Hillsdale, Illinois Area Codes

Map of Hillsdale

Local time – 1 timezone

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Eastern timezone

Prefixes – 2 codes

Prefix
Type
Location
Carrier
Assigned
(309) 658
Landline
Citizens Telecom CO Illinois-frontier Citizens -il
-
Landline
Mediacom Telephony of Illinois, LLC - IL
2001/10/26
(309) 771-1
Landline
Mediacom Telephony of Illinois, LLC - IL
2010/03/15
(309) 771-2
Landline
Twilio International, Inc.
2021/07/27
(309) 771-3
Landline
Onvoy, LLC
2021/03/09
(309) 771-5
Landline
Onvoy, LLC
2020/03/03
(309) 771-7
Landline
Centurylink Communications, LLC LA
2016/09/07
(309) 771-8
Landline
Stratus Networks
2020/11/18