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Central Office Lookup Tool

Find consumer and business lists by geography and telecommunications infrastructure using our Central Office Lookup Tool. Find out detailed information about specific Central Offices including location, consumer and business list counts, and the telecommunications companies and equipment hosted in that facility.

Map of Central Office Locations

Find detailed information on over 35,000 Central Offices. Enter a CLLI code, NPA-NXX, zip code, or click on the name of a state to find the Central Office of interest.

State / Province
AlabamaLouisianaOhio
AlaskaMaineOklahoma
American SamoaMarshall IslandsOregon
ArizonaMarylandPalau
ArkansasMassachusettsPennsylvania
CaliforniaMichiganRhode Island
ColoradoMicronesiaSouth Carolina
ConnecticutMinnesotaSouth Dakota
DelawareMississippiTennessee
Dist. of ColumbiaMissouriTexas
FloridaMontanaUtah
GeorgiaNebraskaVermont
GuamNevadaVirgin Islands
HawaiiNew HampshireVirginia
IdahoNew JerseyWashington
IllinoisNew MexicoWest Virginia
IndianaNew YorkWisconsin
IowaNorth CarolinaWyoming
KansasNorth Dakota 
KentuckyNorthern Marianas 

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Direct Marketing Services - Marigold Technologies