East Contra Costa, California Area Codes

Map of East Contra Costa

Local time – 1 timezone

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Mountain timezone

Prefixes – 19 codes

Prefix
Type
Location
Carrier
Assigned
Landline
Pacific Bell
-
(925) 240-0
Landline
Pacific Bell
-
(925) 240-1
Landline
Pacific Bell
-
(925) 240-2
Landline
Pacific Bell
-
(925) 240-3
Landline
Bandwidth.com CLEC, LLC - CA
2010/02/03
(925) 240-4
Landline
Comcast IP Phone, LLC
2012/11/14
(925) 240-5
Landline
Pacific Bell
-
(925) 240-6
Landline
Pacific Bell
-
(925) 240-7
Landline
Pacific Bell
-
(925) 240-8
Landline
Pacific Bell
-
(925) 240-9
Landline
Pacific Bell
-
Unknown
Sonic Telecom, LLC - CA
2017/01/13
(925) 306-0
Unknown
Sonic Telecom, LLC - CA
2017/01/13
(925) 306-1
Landline
Onvoy, LLC - CA
2017/05/23
(925) 306-2
Wireless
New Cingular Wireless PCS, LLC
2017/08/14
(925) 306-3
Landline
Integrated Path Communications, LLC - CA
2018/07/03
(925) 306-4
Landline
Bandwidth.com CLEC, LLC - CA
2020/06/23
(925) 306-5
Wireless
New Cingular Wireless PCS, LLC
2020/03/05
(925) 306-6
Unknown
Sonic Telecom, LLC - CA
2019/05/15
(925) 306-7
Wireless
New Cingular Wireless PCS, LLC
2019/10/23
(925) 306-8
Landline
Telnyx LLC
2017/05/31
(925) 306-9
Wireless
New Cingular Wireless PCS, LLC
2018/07/09
Landline
Level 3 Telecom of California, LP - CA
-
(925) 308-0
Wireless
New Cingular Wireless PCS, LLC
2014/10/28
(925) 308-1
Landline
Level 3 Telecom of California, LP - CA
-
(925) 308-2
Landline
Onvoy, LLC - CA
2010/02/16
(925) 308-3
Wireless
New Cingular Wireless PCS, LLC
2014/10/28
(925) 308-4
Landline
Comcast IP Phone, LLC
2005/08/17
(925) 308-5
Landline
Bandwidth.com CLEC, LLC - CA
2010/04/23
(925) 308-6
Landline
Bandwidth.com CLEC, LLC - CA
2011/05/04
(925) 308-7
Landline
Pacific Bell
2004/02/10
(925) 308-8
Landline
Pacific Bell
2004/02/10
(925) 308-9
Landline
Level 3 Communications, LLC - AK
2005/10/28
Wireless
New Cingular Wireless PCS, LLC
2016/04/11
(925) 390-0
Landline
Onvoy, LLC - CA
2016/04/21
(925) 390-1
Landline
Onvoy, LLC - CA
2016/04/21
(925) 390-2
Wireless
New Cingular Wireless PCS, LLC
2017/07/31
(925) 390-3
Landline
Bandwidth.com CLEC, LLC - CA
2016/06/27
(925) 390-4
Landline
Local Access Services LLC - CA
2016/08/17
(925) 390-5
Landline
Comcast IP Phone, LLC
2016/08/26
(925) 390-6
Unknown
Sonic Telecom, LLC - CA
2016/08/30
(925) 390-7
Landline
AT&T Corp.
2016/10/27
(925) 390-8
Wireless
New Cingular Wireless PCS, LLC
2016/04/11
(925) 390-9
Wireless
New Cingular Wireless PCS, LLC
2016/04/11
Landline
Teleport Communications America - ID - LLC
-
(925) 392-0
Landline
Level 3 Communications, LLC - AK
2005/10/28
(925) 392-1
Landline
Bandwidth.com CLEC, LLC - CA
2011/05/04
(925) 392-3
Landline
Level 3 Communications, LLC - AK
2004/12/10
(925) 392-4
Landline
Level 3 Communications, LLC - AK
2002/12/18
(925) 392-5
Landline
Bandwidth.com CLEC, LLC - CA
2010/06/07
(925) 392-6
Landline
Onvoy, LLC - CA
2013/02/15
(925) 392-7
Landline
Onvoy, LLC - CA
2009/11/19
(925) 392-8
Landline
AT&T Corp.
2006/03/10
(925) 392-9
Landline
Teleport Communications America - ID - LLC
-
Landline
Level 3 Communications, LLC - AK
-
(925) 418-0
Landline
Level 3 Communications, LLC - AK
2014/09/25
(925) 418-1
Landline
Fusion Communications, LLC
2012/04/10
(925) 418-2
Wireless
New Cingular Wireless PCS, LLC
2015/05/11
(925) 418-3
Landline
Mcimetro Access Transmission Services LLC
2008/06/23
(925) 418-4
Landline
Comcast IP Phone, LLC
2008/11/26
(925) 418-5
Landline
Level 3 Communications, LLC - AK
-
(925) 418-6
Landline
Onvoy, LLC - CA
2010/12/21
(925) 418-7
Landline
Level 3 Communications, LLC - AK
2011/10/05
(925) 418-8
Landline
Level 3 Communications, LLC - AK
-
(925) 418-9
Wireless
New Cingular Wireless PCS, LLC
2015/05/11
Landline
O1 Communications, Inc. - CA
-
(925) 420-0
Landline
Bandwidth.com CLEC, LLC - CA
2012/11/16
(925) 420-1
Landline
O1 Communications, Inc. - CA
-
(925) 420-2
Landline
O1 Communications, Inc. - CA
-
(925) 420-3
Landline
Comcast IP Phone, LLC
2014/09/22
(925) 420-4
Landline
Bandwidth.com CLEC, LLC - CA
2015/05/18
(925) 420-5
Landline
Comcast IP Phone, LLC
2006/10/05
(925) 420-6
Landline
Comcast IP Phone, LLC
2006/10/05
(925) 420-7
Landline
Onvoy, LLC - CA
2013/10/31
(925) 420-8
Landline
Onvoy, LLC - CA
2013/10/31
(925) 420-9
Landline
Onvoy, LLC - CA
2014/11/26
Landline
Bandwidth.com CLEC, LLC - CA
2020/06/26
(925) 450-0
Landline
Bandwidth.com CLEC, LLC - CA
2020/06/26
(925) 450-1
Landline
Bandwidth.com CLEC, LLC - CA
2020/06/26
(925) 450-2
Landline
Bandwidth.com CLEC, LLC - CA
2020/06/26
(925) 450-3
Landline
Bandwidth.com CLEC, LLC - CA
2020/10/15
(925) 450-4
Landline
Twilio International, Inc.
2020/08/11
(925) 450-5
Wireless
New Cingular Wireless PCS, LLC
2020/08/30
(925) 450-6
Landline
Bandwidth.com CLEC, LLC - CA
2020/10/15
(925) 450-7
Landline
Bandwidth.com CLEC, LLC - CA
2020/10/15
(925) 450-8
Wireless
New Cingular Wireless PCS, LLC
2021/05/09
Landline
Pacific Bell
-
(925) 513-0
Landline
Pacific Bell
-
(925) 513-1
Landline
Pacific Bell
-
(925) 513-2
Landline
Pacific Bell
-
(925) 513-3
Landline
Pacific Bell
-
(925) 513-4
Landline
Pacific Bell
-
(925) 513-5
Landline
Comcast IP Phone, LLC
2011/08/31
(925) 513-6
Landline
Pacific Bell
-
(925) 513-7
Landline
Pacific Bell
-
(925) 513-8
Landline
Pacific Bell
-
(925) 513-9
Landline
Pacific Bell
-
(925) 516
Landline
Pacific Bell
-
Unknown
Ton80 Communications, LLC
2020/11/03
(925) 578-0
Unknown
Sonic Telecom, LLC - CA
2021/06/17
(925) 578-1
Landline
Onvoy, LLC - CA
2021/07/02
(925) 578-2
Landline
Onvoy, LLC - CA
2021/03/19
(925) 578-3
Landline
Onvoy, LLC - CA
2021/03/19
(925) 578-4
Landline
Onvoy, LLC - CA
2021/03/19
(925) 578-5
Wireless
Onvoy Spectrum, LLC
2021/06/28
(925) 578-6
Landline
Onvoy, LLC - CA
2021/07/02
(925) 578-7
Unknown
Ton80 Communications, LLC
2020/11/03
(925) 578-8
Landline
Onvoy, LLC - CA
2021/07/02
(925) 578-9
Landline
Onvoy, LLC - CA
2021/07/02
(925) 625
Landline
Pacific Bell
-
Landline
Mcimetro Access Transmission Services LLC
-
(925) 626-0
Landline
Bandwidth.com CLEC, LLC - CA
2015/05/18
(925) 626-1
Landline
Xo California, Inc.
2006/03/13
(925) 626-2
Landline
Paetec Communications, Inc. - CA
2012/08/14
(925) 626-3
Landline
Pacific Bell
2006/08/15
(925) 626-4
Landline
Xo California, Inc.
2007/03/13
(925) 626-5
Landline
AT&T Corp.
2014/02/07
(925) 626-6
Unknown
Sonic Telecom, LLC - CA
2015/03/30
(925) 626-7
Landline
Comcast IP Phone, LLC
2008/05/29
(925) 626-8
Landline
Comcast IP Phone, LLC
2015/09/24
(925) 626-9
Landline
Mcimetro Access Transmission Services LLC
-
(925) 634
Landline
Pacific Bell
-
Landline
Matrix Telecom, LLC. S/i/i Tnci - CA
-
(925) 666-0
Landline
Level 3 Communications, LLC - AK
-
(925) 666-1
Landline
Onvoy, LLC - CA
-
(925) 666-2
Landline
Onvoy, LLC - CA
-
(925) 666-3
Landline
Onvoy, LLC - CA
-
(925) 666-4
Landline
Us Telepacific Corp. - CA
-
(925) 666-5
Landline
Bandwidth.com CLEC, LLC - CA
2020/06/23
(925) 666-6
Landline
Onvoy, LLC - CA
2010/09/08
(925) 666-7
Landline
Onvoy, LLC - CA
2005/12/13
(925) 666-8
Landline
Comcast IP Phone, LLC
2014/03/18
(925) 666-9
Landline
Onvoy, LLC - CA
2014/11/26
Landline
Pacific Bell
-
(925) 679-0
Landline
Pacific Bell
-
(925) 679-1
Landline
Pacific Bell
-
(925) 679-2
Landline
Pacific Bell
-
(925) 679-3
Landline
Pacific Bell
-
(925) 679-4
Landline
Comcast IP Phone, LLC
2015/11/09
(925) 679-5
Landline
Bandwidth.com CLEC, LLC - CA
2008/10/24
(925) 679-6
Landline
Centurylink Communications, LLC LA
2014/02/28
(925) 679-7
Landline
AT&T Corp.
2010/04/20
(925) 679-8
Landline
Pacific Bell
-
(925) 679-9
Landline
Pacific Bell
-
Landline
Pacific Bell
-
(925) 684-0
Landline
Pacific Bell
-
(925) 684-1
Landline
Pacific Bell
-
(925) 684-2
Landline
Pacific Bell
-
(925) 684-3
Landline
Pacific Bell
-
(925) 684-4
Landline
Comcast IP Phone, LLC
2007/04/05
(925) 684-5
Landline
Utility Telecom Group, LLC - CA
2006/05/10
(925) 684-6
Landline
Onvoy, LLC - CA
2013/03/01
(925) 684-7
Landline
Comcast IP Phone, LLC
2010/04/28
(925) 684-8
Landline
Onvoy, LLC - CA
2016/02/12
(925) 684-9
Landline
Pacific Bell
-
Landline
Us Telepacific Corp. - CA
2001/03/01
(925) 809-0
Wireless
New Cingular Wireless PCS, LLC
2015/10/30
(925) 809-1
Landline
Us Telepacific Corp. - CA
-
(925) 809-2
Wireless
New Cingular Wireless PCS, LLC
2015/10/30
(925) 809-3
Landline
Us Telepacific Corp. - CA
-
(925) 809-4
Landline
Onvoy, LLC - CA
2014/11/26
(925) 809-5
Wireless
New Cingular Wireless PCS, LLC
2014/07/09
(925) 809-6
Landline
Peerless Network of California, LLC - CA
2013/03/05
(925) 809-7
Landline
Pacific Bell
2004/05/24
(925) 809-8
Landline
Onvoy, LLC - CA
2016/02/12
(925) 809-9
Landline
Us Telepacific Corp. - CA
-
Landline
Fractel, LLC
2021/07/13
(925) 880-0
Landline
Fractel, LLC
2021/07/13
(925) 880-2
Landline
Fractel, LLC
2021/07/13
(925) 880-4
Landline
Fractel, LLC
2021/07/13
(925) 880-8
Landline
Fractel, LLC
2021/07/13
(925) 880-9
Landline
Fractel, LLC
2021/07/13