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Area Code 231
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Code 231 (Northwest Lower Peninsula of Michigan).
Click on the pictures below for a larger version.
Big Rapids
Listing Updated:
December 2021Operating Company:
at&t/SBC/Ameritech/Michigan BellCLLI:
BGRPMIMNDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(231) 527, 591-2, 796Notes:
Source: GSV
Northport
Listing Updated:
November 2023Operating Company:
at&t/SBC/Ameritech/Michigan BellCLLI:
NPRTMIMNRSASwitch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(231) 386Notes:
Source: GSV
Traverse City
Listing Updated:
September 2023Operating Company:
at&t/SBC/Ameritech/Michigan BellCLLI:
TRCYMIMNDS1Switch Type:
Ribbon/Genband/Nortel DMS-100/200Prefixes Served:
(231) 890, 922, 929, 932-3, 935Notes:
Source: GSV
Visit other Michigan Area Codes: 231 248 269 313 517 586 616 734 810 906 989
Visit nearby regions: Indiana Ohio Ontario Wisconsin
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Copyright 2023 Telephone Central Office Building
Pictures |