Gaithersburg, Maryland Area Codes

240 301
Map of Gaithersburg Local time Prefixes

Map of Gaithersburg

Local time – 1 timezone

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Atlantic timezone

Prefixes – 68 codes

Prefix
Type
Location
Carrier
Assigned
Wireless
Cellco Partnership DBA Verizon Wireless
2012/09/10
(240) 224-0
Landline
Bandwidth.com CLEC, LLC - MD
2013/05/21
(240) 224-1
Wireless
T-mobile USA, Inc.
2014/05/12
(240) 224-2
Wireless
Cellco Partnership DBA Verizon Wireless
2013/04/23
(240) 224-3
Landline
Bandwidth.com CLEC, LLC - MD
2013/05/21
(240) 224-4
Wireless
Cellco Partnership DBA Verizon Wireless
2013/06/20
(240) 224-5
Wireless
T-mobile USA, Inc.
2013/05/22
(240) 224-6
Wireless
T-mobile USA, Inc.
2013/05/22
(240) 224-7
Landline
Comcast IP Phone, LLC
2013/03/29
(240) 224-8
Landline
Peerless Network of Maryland, LLC
2013/04/04
(240) 224-9
Landline
Peerless Network of Maryland, LLC
2013/04/04
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 243-0
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 243-1
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 243-2
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 243-3
Wireless
New Cingular Wireless PCS, LLC
2014/09/09
(240) 243-4
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 243-5
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 243-6
Landline
Comcast IP Phone, LLC
2018/11/02
(240) 243-7
Wireless
New Cingular Wireless PCS, LLC
2019/01/10
(240) 243-8
Landline
Terra Nova Telecom Inc.
2020/12/30
(240) 243-9
Landline
Allegiance Telecom of Maryland, Inc.
-
Landline
Starpower Communications, LLC - DC
-
(240) 246-0
Landline
Starpower Communications, LLC - DC
-
(240) 246-1
Landline
Starpower Communications, LLC - DC
-
(240) 246-2
Landline
Starpower Communications, LLC - DC
-
(240) 246-3
Wireless
Sprint Spectrum, L.P.
2005/06/02
(240) 246-4
Wireless
New Cingular Wireless PCS, LLC
2004/12/17
(240) 246-5
Wireless
New Cingular Wireless PCS, LLC
2004/12/17
(240) 246-6
Wireless
New Cingular Wireless PCS, LLC
2004/12/17
(240) 246-7
Landline
Comcast IP Phone, LLC
2005/06/30
(240) 246-8
Landline
Starpower Communications, LLC - DC
-
(240) 246-9
Landline
Starpower Communications, LLC - DC
-
Landline
Level 3 Communications, LLC - AK
-
(240) 252-0
Wireless
New Cingular Wireless PCS, LLC
2004/02/10
(240) 252-1
Landline
Level 3 Communications, LLC - AK
2005/02/18
(240) 252-2
Landline
Level 3 Communications, LLC - AK
2011/01/10
(240) 252-3
Landline
Level 3 Communications, LLC - AK
2005/02/18
(240) 252-4
Landline
Level 3 Communications, LLC - AK
-
(240) 252-5
Landline
Level 3 Communications, LLC - AK
2005/02/18
(240) 252-6
Landline
Level 3 Communications, LLC - AK
2005/02/18
(240) 252-7
Landline
Level 3 Communications, LLC - AK
2005/02/18
(240) 252-8
Wireless
New Cingular Wireless PCS, LLC
2006/08/23
(240) 252-9
Wireless
New Cingular Wireless PCS, LLC
2004/02/10
Landline
Onvoy, LLC - MD
2015/12/23
(240) 261-0
Landline
Onvoy, LLC - MD
2015/12/29
(240) 261-1
Landline
Onvoy, LLC - MD
2015/12/29
(240) 261-2
Landline
Onvoy, LLC - MD
2015/12/29
(240) 261-3
Wireless
T-mobile USA, Inc.
2016/03/02
(240) 261-4
Landline
Comcast IP Phone, LLC
2016/04/04
(240) 261-5
Landline
Onvoy, LLC - MD
2017/05/08
(240) 261-6
Landline
Comcast IP Phone, LLC
2016/07/20
(240) 261-7
Landline
Bandwidth.com CLEC, LLC - MD
2016/08/22
(240) 261-8
Wireless
Cellco Partnership DBA Verizon Wireless
2018/06/27
(240) 261-9
Landline
Local Access LLC - MD
2016/05/02
Prefix
Type
Location
Carrier
Assigned
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 306-0
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 306-1
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 306-2
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 306-3
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 306-4
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 306-5
Wireless
Cellco Partnership DBA Verizon Wireless
2017/09/07
(240) 306-6
Wireless
T-mobile USA, Inc.
2018/06/29
(240) 306-7
Wireless
New Cingular Wireless PCS, LLC
2019/10/10
(240) 306-8
Wireless
New Cingular Wireless PCS, LLC
2019/10/10
(240) 306-9
Landline
Allegiance Telecom of Maryland, Inc.
-
(240) 327
Landline
Core Communications, Inc.- MD
-
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-0
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-1
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-2
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-3
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-4
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-5
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-6
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
(240) 361-7
Wireless
New Cingular Wireless PCS, LLC
2006/01/03
(240) 361-8
Wireless
New Cingular Wireless PCS, LLC
2006/01/03
(240) 361-9
Landline
Cavalier Telephone Mid-atlantic, LLC - MD
-
Landline
Cavalier East, LLC - MD
2001/05/09
(240) 364-0
Landline
Cavalier East, LLC - MD
-
(240) 364-1
Landline
Cavalier East, LLC - MD
-
(240) 364-2
Landline
Cavalier East, LLC - MD
-
(240) 364-3
Landline
Cavalier East, LLC - MD
-
(240) 364-4
Wireless
New Cingular Wireless PCS, LLC
2007/10/05
(240) 364-5
Landline
Cavalier East, LLC - MD
-
(240) 364-6
Landline
Cavalier East, LLC - MD
-
(240) 364-7
Landline
Cavalier East, LLC - MD
-
(240) 364-8
Landline
Cavalier East, LLC - MD
-
(240) 364-9
Landline
Cavalier East, LLC - MD
-
(240) 372
Wireless
Sprint Spectrum, L.P.
-
Wireless
Sprint Spectrum, L.P.
2002/11/04
(240) 388-0
Wireless
Sprint Spectrum, L.P.
2003/04/19
(240) 388-1
Wireless
Sprint Spectrum, L.P.
2003/04/19
(240) 388-2
Wireless
Sprint Spectrum, L.P.
2003/07/22
(240) 388-3
Wireless
Sprint Spectrum, L.P.
2004/04/16
(240) 388-4
Wireless
Sprint Spectrum, L.P.
2004/04/16
(240) 388-5
Wireless
New Cingular Wireless PCS, LLC
2007/11/19
(240) 388-6
Wireless
Sprint Spectrum, L.P.
2002/11/07
(240) 388-7
Wireless
Sprint Spectrum, L.P.
2003/02/05
(240) 388-8
Wireless
Sprint Spectrum, L.P.
2003/02/05
(240) 388-9
Landline
Bandwidth.com CLEC, LLC - MD
2004/10/13
Prefix
Type
Location
Carrier
Assigned
Landline
Xo Maryland, LLC
2001/02/13
(240) 404-0
Landline
Xo Maryland, LLC
-
(240) 404-1
Landline
Verizon Maryland, Inc.
2002/05/29
(240) 404-2
Landline
Verizon Maryland, Inc.
2002/05/29
(240) 404-3
Landline
Verizon Maryland, Inc.
2002/05/29
(240) 404-4
Landline
Verizon Maryland, Inc.
2002/05/29
(240) 404-5
Landline
Verizon Maryland, Inc.
2002/05/29
(240) 404-6
Landline
Xo Maryland, LLC
2005/07/20
(240) 404-7
Landline
Xo Maryland, LLC
2005/07/20
(240) 404-8
Wireless
New Cingular Wireless PCS, LLC
2008/05/27
(240) 404-9
Landline
Xo Maryland, LLC
-
Wireless
New Cingular Wireless PCS, LLC
-
(240) 449-0
Wireless
New Cingular Wireless PCS, LLC
2003/11/12
(240) 449-1
Landline
Ctc Communications Corp. - MD
2005/08/09
(240) 449-2
Wireless
New Cingular Wireless PCS, LLC
2003/04/02
(240) 449-3
Landline
Level 3 Communications, LLC - AK
2006/04/11
(240) 449-4
Landline
Bandwidth.com CLEC, LLC - MD
2011/04/08
(240) 449-5
Wireless
New Cingular Wireless PCS, LLC
2005/03/14
(240) 449-6
Wireless
New Cingular Wireless PCS, LLC
2005/03/14
(240) 449-7
Wireless
New Cingular Wireless PCS, LLC
2005/03/14
(240) 449-8
Landline
Level 3 Communications, LLC - AK
2006/04/11
(240) 449-9
Wireless
New Cingular Wireless PCS, LLC
-
Landline
Paetec Communications, Inc. - CA
2005/04/22
(240) 454-0
Landline
Onvoy, LLC - MD
2008/11/05
(240) 454-1
Wireless
Cellco Partnership DBA Verizon Wireless
2010/06/03
(240) 454-2
Wireless
Cellco Partnership DBA Verizon Wireless
2011/01/04
(240) 454-3
Landline
Bandwidth.com CLEC, LLC - MD
2011/04/08
(240) 454-4
Wireless
Cellco Partnership DBA Verizon Wireless
2011/03/03
(240) 454-5
Landline
Bandwidth.com CLEC, LLC - MD
2011/04/08
(240) 454-6
Landline
Paetec Communications, Inc. - CA
2006/11/22
(240) 454-7
Landline
Paetec Communications, Inc. - CA
2005/09/21
(240) 454-8
Landline
Xo Maryland, LLC
2006/07/17
(240) 454-9
Landline
Xo Maryland, LLC
2006/07/17
Landline
Baltimore-washington Telephone (Bwt)
2015/05/22
(240) 474-0
Landline
Onvoy, LLC - MD
2016/02/04
(240) 474-1
Wireless
New Cingular Wireless PCS, LLC
2015/06/15
(240) 474-2
Wireless
New Cingular Wireless PCS, LLC
2015/06/15
(240) 474-3
Wireless
New Cingular Wireless PCS, LLC
2015/06/15
(240) 474-4
Landline
Baltimore-washington Telephone (Bwt)
2015/05/27
(240) 474-5
Landline
Comcast IP Phone, LLC
2015/09/02
(240) 474-6
Wireless
T-mobile USA, Inc.
2015/11/16
(240) 474-7
Wireless
New Cingular Wireless PCS, LLC
2015/09/17
(240) 474-8
Wireless
New Cingular Wireless PCS, LLC
2015/12/09
(240) 474-9
Landline
Onvoy, LLC - MD
2016/02/04
Landline
Lightwave Communications, LLC - MD
2005/05/20
(240) 477-0
Wireless
New Cingular Wireless PCS, LLC
2008/05/27
(240) 477-1
Landline
Lightwave Communications, LLC - MD
2005/05/23
(240) 477-2
Wireless
New Cingular Wireless PCS, LLC
2006/03/22
(240) 477-3
Wireless
New Cingular Wireless PCS, LLC
2006/03/22
(240) 477-4
Landline
Comcast IP Phone, LLC
2006/05/10
(240) 477-5
Landline
Comcast IP Phone, LLC
2006/05/10
(240) 477-6
Landline
Comcast IP Phone, LLC
2006/07/21
(240) 477-7
Landline
Comcast IP Phone, LLC
2006/07/21
(240) 477-8
Landline
Comcast IP Phone, LLC
2006/07/21
(240) 477-9
Wireless
New Cingular Wireless PCS, LLC
2008/05/27
Prefix
Type
Location
Carrier
Assigned
Landline
Mcimetro Access Transmission Services LLC
2015/06/12
(240) 562-0
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-1
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-2
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-3
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-4
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-5
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-6
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-7
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-8
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
(240) 562-9
Landline
Mcimetro Access Transmission Services LLC
2015/06/08
Landline
Peerless Network of Maryland, LLC
-
(240) 597-0
Landline
Peerless Network of Maryland, LLC
-
(240) 597-1
Landline
Peerless Network of Maryland, LLC
-
(240) 597-2
Landline
Commio, LLC
2021/06/17
(240) 597-3
Landline
Core Communications, Inc.- MD
2019/06/10
(240) 597-4
Landline
Core Communications, Inc.- MD
2019/06/10
(240) 597-5
Landline
Core Communications, Inc.- MD
2019/06/10
(240) 597-6
Wireless
New Cingular Wireless PCS, LLC
2019/06/17
(240) 597-7
Landline
Peerless Network of Maryland, LLC
2019/11/29
(240) 597-8
Landline
Radiantiq LLC
2021/05/10
(240) 597-9
Landline
Peerless Network of Maryland, LLC
-
Prefix
Type
Location
Carrier
Assigned
(240) 631
Landline
Verizon Maryland, Inc.
-
(240) 632
Landline
Verizon Maryland, Inc.
-
Wireless
New Cingular Wireless PCS, LLC
2006/05/19
(240) 654-0
Landline
Level 3 Communications, LLC - AK
2008/05/05
(240) 654-1
Landline
Level 3 Communications, LLC - AK
2008/05/05
(240) 654-2
Wireless
New Cingular Wireless PCS, LLC
2006/05/23
(240) 654-3
Landline
Comcast IP Phone, LLC
2008/03/18
(240) 654-4
Landline
Comcast IP Phone, LLC
2008/03/18
(240) 654-5
Landline
Ymax Communications Corp. - MD
2009/07/14
(240) 654-6
Landline
Ymax Communications Corp. - MD
2009/07/14
(240) 654-7
Wireless
New Cingular Wireless PCS, LLC
2008/07/07
(240) 654-8
Landline
Ymax Communications Corp. - MD
2008/07/09
(240) 654-9
Landline
Ymax Communications Corp. - MD
2008/07/09
Landline
Vonage America LLC
2018/12/04
(240) 658-0
Landline
Vonage America LLC
2018/12/05
(240) 658-1
Landline
Vonage America LLC
2018/12/05
(240) 658-2
Landline
Vonage America LLC
2018/12/05
(240) 658-3
Landline
Vonage America LLC
2018/12/05
(240) 658-4
Landline
Vonage America LLC
2018/12/05
(240) 658-5
Wireless
T-mobile USA, Inc.
2019/11/05
(240) 658-6
Landline
Vonage America LLC
2018/12/05
(240) 658-7
Wireless
Onvoy Spectrum, LLC
2021/04/21
(240) 658-8
Landline
Onvoy, LLC - MD
2021/01/19
(240) 658-9
Landline
Onvoy, LLC - MD
2021/01/19
(240) 683
Landline
Verizon Maryland, Inc.
-
Landline
Verizon Maryland, Inc.
-
(240) 686-0
Landline
Verizon Maryland, Inc.
-
(240) 686-1
Landline
Verizon Maryland, Inc.
-
(240) 686-2
Landline
Verizon Maryland, Inc.
-
(240) 686-3
Landline
Verizon Maryland, Inc.
-
(240) 686-4
Landline
Verizon Maryland, Inc.
-
(240) 686-5
Landline
Bandwidth.com CLEC, LLC - MD
2012/07/16
(240) 686-6
Landline
Comcast IP Phone, LLC
2014/05/27
(240) 686-7
Landline
Verizon Maryland, Inc.
-
(240) 686-8
Landline
Ymax Communications Corp. - MD
2007/06/29
(240) 686-9
Wireless
New Cingular Wireless PCS, LLC
2014/09/09
Landline
Teleport Communications America - ID - LLC
2016/11/10
(240) 690-0
Landline
Telnyx LLC
2017/03/02
(240) 690-1
Wireless
New Cingular Wireless PCS, LLC
2017/01/13
(240) 690-2
Landline
Onvoy, LLC - MD
2018/05/16
(240) 690-3
Landline
Teleport Communications America - ID - LLC
2016/11/10
(240) 690-4
Landline
Comcast IP Phone, LLC
2017/02/15
(240) 690-5
Landline
Onvoy, LLC - MD
2017/11/15
(240) 690-6
Landline
Onvoy, LLC - MD
2017/11/15
(240) 690-7
Landline
Mcimetro Access Transmission Services LLC
2019/05/15
(240) 690-8
Landline
Peerless Network of Maryland, LLC
2019/07/31
(240) 690-9
Landline
Vonage America LLC
2018/11/30
Prefix
Type
Location
Carrier
Assigned
Wireless
Cellco Partnership DBA Verizon Wireless
2014/10/07
(240) 702-0
Landline
Comcast IP Phone, LLC
2015/06/02
(240) 702-1
Landline
Onvoy, LLC - MD
2014/10/10
(240) 702-2
Landline
Onvoy, LLC - MD
2014/10/10
(240) 702-3
Wireless
Cellco Partnership DBA Verizon Wireless
2015/09/15
(240) 702-4
Wireless
New Cingular Wireless PCS, LLC
2014/10/27
(240) 702-5
Wireless
New Cingular Wireless PCS, LLC
2014/10/27
(240) 702-6
Wireless
New Cingular Wireless PCS, LLC
2014/10/27
(240) 702-7
Wireless
T-mobile USA, Inc.
2014/12/05
(240) 702-8
Wireless
T-mobile USA, Inc.
2014/12/10
(240) 702-9
Landline
Vonage America LLC
2018/11/30
Landline
Global Crossing Local Services, Inc. - KY
-
(240) 720-0
Landline
Global Crossing Local Services, Inc. - KY
-
(240) 720-1
Landline
Global Crossing Local Services, Inc. - KY
-
(240) 720-2
Landline
Local Access LLC - MD
2007/08/17
(240) 720-3
Landline
Level 3 Communications, LLC - AK
2007/11/20
(240) 720-4
Landline
Global Crossing Local Services, Inc. - KY
-
(240) 720-5
Landline
Ymax Communications Corp. - MD
2008/04/02
(240) 720-6
Landline
Xo Maryland, LLC
2008/10/02
(240) 720-7
Landline
Bandwidth.com CLEC, LLC - MD
2010/09/28
(240) 720-8
Landline
Global Crossing Local Services, Inc. - KY
-
(240) 720-9
Landline
Global Crossing Local Services, Inc. - KY
-
Wireless
New Cingular Wireless PCS, LLC
2005/05/06
(240) 750-0
Wireless
Cellco Partnership DBA Verizon Wireless
2006/12/15
(240) 750-1
Wireless
New Cingular Wireless PCS, LLC
2005/05/10
(240) 750-2
Wireless
New Cingular Wireless PCS, LLC
2005/05/10
(240) 750-3
Wireless
Cellco Partnership DBA Verizon Wireless
2007/04/09
(240) 750-4
Wireless
Cellco Partnership DBA Verizon Wireless
2007/04/09
(240) 750-5
Wireless
Cellco Partnership DBA Verizon Wireless
2008/04/02
(240) 750-6
Landline
Level 3 Communications, LLC - AK
2007/09/05
(240) 750-7
Wireless
Cellco Partnership DBA Verizon Wireless
2007/08/30
(240) 750-8
Wireless
Cellco Partnership DBA Verizon Wireless
2007/08/30
(240) 750-9
Wireless
Cellco Partnership DBA Verizon Wireless
2007/08/30
Landline
Level 3 Communications, LLC - AK
-
(240) 751-0
Wireless
New Cingular Wireless PCS, LLC
2006/10/30
(240) 751-1
Landline
Level 3 Communications, LLC - AK
-
(240) 751-2
Wireless
New Cingular Wireless PCS, LLC
2006/07/12
(240) 751-3
Wireless
New Cingular Wireless PCS, LLC
2006/07/12
(240) 751-4
Landline
Level 3 Communications, LLC - AK
2002/12/23
(240) 751-5
Wireless
New Cingular Wireless PCS, LLC
2006/10/30
(240) 751-6
Wireless
New Cingular Wireless PCS, LLC
2006/10/30
(240) 751-7
Wireless
New Cingular Wireless PCS, LLC
2006/10/30
(240) 751-8
Wireless
New Cingular Wireless PCS, LLC
2006/10/30
(240) 751-9
Landline
Level 3 Communications, LLC - AK
2007/05/11
Landline
Level 3 Communications, LLC - AK
-
(240) 780-0
Landline
Local Access LLC - MD
2013/08/12
(240) 780-1
Wireless
New Cingular Wireless PCS, LLC
2009/04/20
(240) 780-2
Landline
Bandwidth.com CLEC, LLC - MD
2010/11/03
(240) 780-3
Landline
Level 3 Communications, LLC - AK
-
(240) 780-4
Landline
Level 3 Communications, LLC - AK
-
(240) 780-5
Landline
Onvoy, LLC - MD
2021/06/16
(240) 780-6
Wireless
New Cingular Wireless PCS, LLC
2009/04/20
(240) 780-7
Landline
Comcast IP Phone, LLC
2012/09/12
(240) 780-8
Landline
Bandwidth.com CLEC, LLC - MD
2012/09/20
(240) 780-9
Landline
Commio, LLC
2021/06/17
Wireless
Sprint Spectrum, L.P.
2001/03/15
(240) 793-0
Wireless
Sprint Spectrum, L.P.
-
(240) 793-1
Wireless
Sprint Spectrum, L.P.
-
(240) 793-2
Wireless
Sprint Spectrum, L.P.
2002/10/31
(240) 793-3
Wireless
Sprint Spectrum, L.P.
2002/10/31
(240) 793-4
Wireless
Sprint Spectrum, L.P.
-
(240) 793-5
Wireless
Sprint Spectrum, L.P.
-
(240) 793-6
Wireless
Sprint Spectrum, L.P.
-
(240) 793-7
Wireless
Sprint Spectrum, L.P.
-
(240) 793-8
Wireless
Sprint Spectrum, L.P.
-
(240) 793-9
Wireless
Sprint Spectrum, L.P.
-
Prefix
Type
Location
Carrier
Assigned
Wireless
Cellco Partnership DBA Verizon Wireless
2013/10/04
(240) 801-0
Wireless
Cellco Partnership DBA Verizon Wireless
2013/10/09
(240) 801-1
Wireless
T-mobile USA, Inc.
2014/07/31
(240) 801-2
Wireless
Cellco Partnership DBA Verizon Wireless
2015/02/03
(240) 801-3
Landline
Onvoy, LLC - MD
2015/05/28
(240) 801-4
Landline
Comcast IP Phone, LLC
2014/04/01
(240) 801-5
Landline
Bandwidth.com CLEC, LLC - MD
2014/05/02
(240) 801-6
Landline
Bandwidth.com CLEC, LLC - MD
2014/05/02
(240) 801-7
Landline
Bandwidth.com CLEC, LLC - MD
2014/05/02
(240) 801-8
Landline
Comcast IP Phone, LLC
2014/05/27
(240) 801-9
Landline
Comcast IP Phone, LLC
2014/06/16
Wireless
Cellco Partnership DBA Verizon Wireless
2015/11/17
(240) 805-0
Wireless
Cellco Partnership DBA Verizon Wireless
2015/11/18
(240) 805-1
Landline
Paetec Communications, Inc. - CA
2016/06/30
(240) 805-2
Wireless
New Cingular Wireless PCS, LLC
2016/08/22
(240) 805-3
Wireless
Cellco Partnership DBA Verizon Wireless
2016/09/02
(240) 805-4
Wireless
New Cingular Wireless PCS, LLC
2016/02/12
(240) 805-5
Landline
Comcast IP Phone, LLC
2015/12/17
(240) 805-6
Landline
Vonage America LLC
2018/11/30
(240) 805-7
Wireless
New Cingular Wireless PCS, LLC
2017/12/07
(240) 805-8
Wireless
New Cingular Wireless PCS, LLC
2016/06/23
(240) 805-9
Unknown
Barr Tell USA, Inc.
2016/11/01
Landline
Atx Communications Services, Ltd.
-
(240) 813-0
Landline
Bandwidth.com CLEC, LLC - MD
2008/11/17
(240) 813-1
Landline
Us Lec of Maryland, Inc.
2008/03/06
(240) 813-2
Landline
Us Lec of Maryland, Inc.
2007/07/02
(240) 813-3
Landline
Bandwidth.com CLEC, LLC - MD
2010/05/27
(240) 813-4
Landline
Bandwidth.com CLEC, LLC - MD
2010/05/27
(240) 813-5
Wireless
New Cingular Wireless PCS, LLC
2005/04/13
(240) 813-6
Landline
Atx Communications Services, Ltd.
-
(240) 813-7
Landline
Xo Maryland, LLC
2009/12/10
(240) 813-8
Landline
Bandwidth.com CLEC, LLC - MD
2010/12/22
(240) 813-9
Landline
Bandwidth.com CLEC, LLC - MD
2010/05/27
Wireless
Sprint Spectrum, L.P.
-
(240) 848-0
Wireless
New Cingular Wireless PCS, LLC
2011/01/31
(240) 848-1
Wireless
Sprint Spectrum, L.P.
2004/06/16
(240) 848-2
Wireless
Sprint Spectrum, L.P.
2004/11/30
(240) 848-3
Wireless
Sprint Spectrum, L.P.
2004/11/30
(240) 848-4
Wireless
Sprint Spectrum, L.P.
2005/03/02
(240) 848-5
Wireless
Sprint Spectrum, L.P.
2005/03/23
(240) 848-6
Wireless
Sprint Spectrum, L.P.
2005/08/23
(240) 848-7
Landline
Bandwidth.com CLEC, LLC - MD
2010/07/19
(240) 848-8
Wireless
New Cingular Wireless PCS, LLC
2011/01/31
(240) 848-9
Landline
Level 3 Telecom of Maryland, LLC - MD
2011/09/21
Prefix
Type
Location
Carrier
Assigned
Landline
Us Lec of Maryland, Inc.
-
(240) 912-0
Landline
Us Lec of Maryland, Inc.
-
(240) 912-1
Landline
Us Lec of Maryland, Inc.
-
(240) 912-2
Landline
Us Lec of Maryland, Inc.
-
(240) 912-3
Landline
Us Lec of Maryland, Inc.
-
(240) 912-4
Landline
Comcast IP Phone, LLC
2006/11/15
(240) 912-5
Landline
Comcast IP Phone, LLC
2006/11/15
(240) 912-6
Landline
Comcast IP Phone, LLC
2006/11/15
(240) 912-7
Landline
Comcast IP Phone, LLC
2006/11/15
(240) 912-8
Landline
Us Lec of Maryland, Inc.
-
(240) 912-9
Landline
Comcast IP Phone, LLC
2006/11/15
Prefix
Type
Location
Carrier
Assigned
(301) 208
Landline
Verizon Maryland, Inc.
-
(301) 216
Landline
Verizon Maryland, Inc.
-
Landline
Mcimetro Access Transmission Services LLC
-
(301) 250-0
Wireless
New Cingular Wireless PCS, LLC
2011/08/17
(301) 250-1
Landline
Onvoy, LLC - MD
2012/02/06
(301) 250-2
Landline
Mcimetro Access Transmission Services LLC
-
(301) 250-3
Wireless
New Cingular Wireless PCS, LLC
2014/07/10
(301) 250-4
Landline
Mcimetro Access Transmission Services LLC
-
(301) 250-5
Wireless
New Cingular Wireless PCS, LLC
2011/08/17
(301) 250-6
Wireless
New Cingular Wireless PCS, LLC
2011/08/17
(301) 250-7
Landline
Xo Maryland, LLC
2010/12/17
(301) 250-8
Wireless
New Cingular Wireless PCS, LLC
2011/08/17
(301) 250-9
Landline
Mcimetro Access Transmission Services LLC
-
(301) 252
Wireless
Sprint Spectrum, L.P.
-
Prefix
Type
Location
Carrier
Assigned
(301) 330
Landline
Verizon Maryland, Inc.
-
Landline
Mcimetro Access Transmission Services LLC
-
(301) 337-0
Wireless
Cellco Partnership DBA Verizon Wireless
2012/05/15
(301) 337-1
Wireless
Cellco Partnership DBA Verizon Wireless
2012/05/15
(301) 337-2
Landline
Mcimetro Access Transmission Services LLC
-
(301) 337-3
Landline
Broadview Networks, Inc. - MD
2011/02/24
(301) 337-4
Landline
Teleport Communications America - ID - LLC
2003/05/07
(301) 337-5
Wireless
Cellco Partnership DBA Verizon Wireless
2012/08/06
(301) 337-6
Landline
Comcast IP Phone, LLC
2013/06/25
(301) 337-7
Landline
Bandwidth.com CLEC, LLC - MD
2010/01/20
(301) 337-8
Landline
Bandwidth.com CLEC, LLC - MD
2010/01/20
(301) 337-9
Wireless
Cellco Partnership DBA Verizon Wireless
2012/10/04
Landline
Verizon Maryland, Inc.
2005/12/08
(301) 355-0
Landline
Level 3 Communications, LLC - AK
2009/09/30
(301) 355-1
Landline
Global Crossing Local Services, Inc. - KY
2009/11/02
(301) 355-2
Landline
Level 3 Communications, LLC - AK
2011/01/03
(301) 355-3
Landline
Cbeyond Comm, LLC MD
2008/05/21
(301) 355-4
Landline
Comcast IP Phone, LLC
2009/07/29
(301) 355-5
Landline
Verizon Maryland, Inc.
2007/07/31
(301) 355-6
Landline
Verizon Maryland, Inc.
2007/07/31
(301) 355-7
Landline
Verizon Maryland, Inc.
2007/07/31
(301) 355-8
Landline
Comcast IP Phone, LLC
2009/07/29
(301) 355-9
Landline
Ymax Communications Corp. - MD
2011/01/21
Wireless
Sprint Spectrum, L.P.
-
(301) 366-0
Landline
Comcast IP Phone, LLC
2013/08/30
(301) 366-1
Wireless
New Cingular Wireless PCS, LLC
2010/06/07
(301) 366-2
Wireless
New Cingular Wireless PCS, LLC
2010/06/07
(301) 366-3
Wireless
Sprint Spectrum, L.P.
2003/09/17
(301) 366-4
Wireless
Sprint Spectrum, L.P.
2003/09/17
(301) 366-5
Wireless
Sprint Spectrum, L.P.
2004/09/08
(301) 366-6
Wireless
New Cingular Wireless PCS, LLC
2010/06/07
(301) 366-7
Wireless
Sprint Spectrum, L.P.
2003/12/05
(301) 366-8
Wireless
Sprint Spectrum, L.P.
2003/12/05
(301) 366-9
Wireless
New Cingular Wireless PCS, LLC
2010/09/15
(301) 370
Wireless
Sprint Spectrum, L.P.
-
Prefix
Type
Location
Carrier
Assigned
Landline
Verizon Maryland, Inc.
-
(301) 407-0
Landline
Verizon Maryland, Inc.
-
(301) 407-1
Landline
Comcast IP Phone, LLC
2011/05/27
(301) 407-2
Landline
Level 3 Communications, LLC - AK
2014/09/29
(301) 407-3
Wireless
Sprint Spectrum, L.P.
2005/06/16
(301) 407-4
Landline
Verizon Maryland, Inc.
2003/04/02
(301) 407-5
Wireless
Sprint Spectrum, L.P.
2006/04/07
(301) 407-6
Landline
Paetec Communications, Inc. - CA
2011/10/03
(301) 407-7
Wireless
Sprint Spectrum, L.P.
2005/11/29
(301) 407-8
Wireless
Sprint Spectrum, L.P.
2006/04/07
(301) 407-9
Landline
Verizon Maryland, Inc.
-
Prefix
Type
Location
Carrier
Assigned
(301) 515
Landline
Verizon Maryland, Inc.
-
(301) 519
Landline
Verizon Maryland, Inc.
-
Landline
Quantum Telecommunications, Inc. - MD
2003/10/16
(301) 525-0
Landline
Quantum Telecommunications, Inc. - MD
2003/10/16
(301) 525-1
Wireless
Cellco Partnership DBA Verizon Wireless
2008/05/06
(301) 525-2
Wireless
Cellco Partnership DBA Verizon Wireless
2008/08/04
(301) 525-3
Wireless
Cellco Partnership DBA Verizon Wireless
2008/09/03
(301) 525-4
Wireless
Cellco Partnership DBA Verizon Wireless
2008/02/05
(301) 525-5
Wireless
Cellco Partnership DBA Verizon Wireless
2008/02/05
(301) 525-6
Wireless
Cellco Partnership DBA Verizon Wireless
2008/06/03
(301) 525-7
Wireless
Cellco Partnership DBA Verizon Wireless
2008/10/03
(301) 525-8
Wireless
Cellco Partnership DBA Verizon Wireless
2008/11/05
(301) 525-9
Wireless
Cellco Partnership DBA Verizon Wireless
2008/12/09
(301) 527
Landline
Verizon Maryland, Inc.
-
(301) 528
Landline
Verizon Maryland, Inc.
-
(301) 540
Landline
Verizon Maryland, Inc.
-
Landline
Teleport Communications America - ID - LLC
-
(301) 556-0
Landline
Teleport Communications America - ID - LLC
-
(301) 556-1
Landline
Teleport Communications America - ID - LLC
-
(301) 556-2
Landline
Teleport Communications America - ID - LLC
-
(301) 556-3
Wireless
Sprint Spectrum, L.P.
2004/10/21
(301) 556-4
Landline
Teleport Communications America - ID - LLC
-
(301) 556-5
Landline
Vdl, Inc. DBA Global Telecom Brokers - MD
2004/02/24
(301) 556-6
Wireless
Sprint Spectrum, L.P.
2004/02/05
(301) 556-7
Wireless
Sprint Spectrum, L.P.
2004/02/05
(301) 556-8
Wireless
Sprint Spectrum, L.P.
2005/10/18
(301) 556-9
Landline
Teleport Communications America - ID - LLC
-
Wireless
Cellco Partnership DBA Verizon Wireless
-
(301) 569-0
Wireless
Cellco Partnership DBA Verizon Wireless
2013/09/05
(301) 569-1
Wireless
Cellco Partnership DBA Verizon Wireless
2014/02/27
(301) 569-2
Landline
Bandwidth.com CLEC, LLC - MD
2011/04/08
(301) 569-3
Wireless
Cellco Partnership DBA Verizon Wireless
2014/02/27
(301) 569-4
Landline
Comcast IP Phone, LLC
2013/11/27
(301) 569-5
Landline
Centurylink Communications, LLC LA
2013/08/01
(301) 569-6
Landline
Comcast IP Phone, LLC
2011/08/26
(301) 569-7
Landline
Comcast IP Phone, LLC
2011/12/15
(301) 569-8
Landline
Ymax Communications Corp. - MD
2011/08/23
(301) 569-9
Landline
Bandwidth.com CLEC, LLC - MD
2012/03/07
Landline
Paetec Communications, Inc. - CA
-
(301) 591-0
Landline
Paetec Communications, Inc. - CA
-
(301) 591-1
Landline
Paetec Communications, Inc. - CA
-
(301) 591-2
Landline
Paetec Communications, Inc. - CA
-
(301) 591-3
Landline
Paetec Communications, Inc. - CA
-
(301) 591-4
Landline
Paetec Communications, Inc. - CA
-
(301) 591-5
Landline
Paetec Communications, Inc. - CA
-
(301) 591-6
Landline
Peerless Network of Maryland, LLC
2020/03/23
(301) 591-7
Landline
Onvoy, LLC - MD
2021/01/19
(301) 591-8
Landline
Paetec Communications, Inc. - CA
-
(301) 591-9
Landline
Paetec Communications, Inc. - CA
-
Prefix
Type
Location
Carrier
Assigned
Landline
Verizon Maryland, Inc.
2004/04/22
(301) 740-0
Wireless
Sprint Spectrum, L.P.
2004/11/01
(301) 740-1
Landline
Verizon Maryland, Inc.
2004/04/22
(301) 740-2
Landline
Verizon Maryland, Inc.
2004/04/22
(301) 740-3
Landline
Verizon Maryland, Inc.
2004/04/22
(301) 740-4
Wireless
Sprint Spectrum, L.P.
2005/03/11
(301) 740-5
Wireless
Sprint Spectrum, L.P.
2006/01/11
(301) 740-6
Landline
Ymax Communications Corp. - MD
2011/08/23
(301) 740-7
Landline
Verizon Maryland, Inc.
2006/03/02
(301) 740-8
Landline
Verizon Maryland, Inc.
2006/03/02
(301) 740-9
Landline
Verizon Maryland, Inc.
2006/03/02
Prefix
Type
Location
Carrier
Assigned
Landline
AT&T - Local
-
(301) 820-0
Wireless
New Cingular Wireless PCS, LLC
2012/01/24
(301) 820-1
Wireless
New Cingular Wireless PCS, LLC
2012/01/24
(301) 820-2
Wireless
New Cingular Wireless PCS, LLC
2010/09/01
(301) 820-3
Landline
Ctc Communications Corp. - MD
2011/05/17
(301) 820-4
Landline
AT&T - Local
-
(301) 820-5
Wireless
New Cingular Wireless PCS, LLC
2009/10/19
(301) 820-6
Landline
AT&T - Local
-
(301) 820-7
Landline
Onvoy, LLC - MD
2011/06/07
(301) 820-8
Wireless
New Cingular Wireless PCS, LLC
2012/01/24
(301) 820-9
Landline
AT&T - Local
-
(301) 869
Landline
Verizon Maryland, Inc.
-
Prefix
Type
Location
Carrier
Assigned
(301) 916
Landline
Verizon Maryland, Inc.
-
(301) 926
Landline
Verizon Maryland, Inc.
-
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-0
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-1
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-2
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-3
Landline
Mcimetro Access Transmission Services LLC
2008/05/21
(301) 944-4
Wireless
Cellco Partnership DBA Verizon Wireless
2011/06/15
(301) 944-5
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-6
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-7
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-8
Landline
Mcimetro Access Transmission Services LLC
-
(301) 944-9
Landline
Mcimetro Access Transmission Services LLC
-
(301) 947
Landline
Verizon Maryland, Inc.
-
Landline
Verizon Maryland, Inc.
2002/05/22
(301) 956-0
Wireless
New Cingular Wireless PCS, LLC
2007/07/23
(301) 956-1
Landline
Verizon Maryland, Inc.
-
(301) 956-2
Landline
Paetec Communications, Inc. - CA
2009/02/02
(301) 956-3
Wireless
Cellco Partnership DBA Verizon Wireless
2009/03/04
(301) 956-4
Wireless
Cellco Partnership DBA Verizon Wireless
2009/04/02
(301) 956-5
Wireless
Cellco Partnership DBA Verizon Wireless
2009/05/04
(301) 956-6
Wireless
Cellco Partnership DBA Verizon Wireless
2009/01/05
(301) 956-7
Landline
Ymax Communications Corp. - MD
2011/03/03
(301) 956-8
Landline
Ymax Communications Corp. - MD
2011/03/03
(301) 956-9
Wireless
Cellco Partnership DBA Verizon Wireless
2010/02/04
(301) 963
Landline
Verizon Maryland, Inc.
-
(301) 972
Landline
Verizon Maryland, Inc.
-
(301) 977
Landline
Verizon Maryland, Inc.
-
(301) 987
Landline
Verizon Maryland, Inc.
-
(301) 990
Landline
Verizon Maryland, Inc.
-

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