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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 (Michigan).
Click on the pictures below for a larger version.
Big Rapids
Listing Updated:
November 2011Operating Company:
at&t/SBC/Ameritech/Michigan BellCLLI:
BGRPMIMNDS0Switch Type:
Genband/Nortel DMS-100Prefixes Served:
(231) 527, 591-2, 796Notes:
Source: TCO
Northport
Listing Updated:
November 2011Operating Company:
at&t/SBC/Ameritech/Michigan BellCLLI:
NPRTMIMNRSASwitch Type:
Genband/Nortel RSCPrefixes Served:
(231) 386Notes:
Source: TCO
Traverse City
Listing Updated:
November 2011Operating Company:
at&t/SBC/Ameritech/Michigan BellCLLI:
TRCYMIMNDS1Switch Type:
Genband/Nortel DMS-100/200Prefixes Served:
(231) 890, 922, 929, 932-3, 935Notes:
Source: TCO
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Copyright 2020 Telephone Central Office Building
Pictures |