UCB Libraries


How do I... find a telephone number?


US Sources

ReferenceUSA - Business / residential; build custom searches based on various information CU

AnyWho (AT&T) - Business / residential

InfoSpace - Business / residential

Switchboard.com - Business / residential; reverse lookup

National Tollfree Directory - Numbers with an 800, 866, 877 or 888 prefix

YellowBook - Business / residential search; reverse lookup


Colorado / Local Sources

DexOnline (Quest) - Business, residential and government search

Google Local - Search for businesses in Colorado (and the US); provides maps, business information and reviews, and directions
State of Colorado Telephone Directory - search for state employees and organizations

-- Consult the US telephone directory sources for more Colorado options


International Sources

AnyWho - Lists available telephone directories by country

Canada 411 - Business, residential and toll-free look-ups in Canada

Infobel World - Links to telephone directories by world region / country


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