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Telephone & Zip Directories

Canada Post - Postal Code Lookup

Canada's official postal code lookup.

Free Lookups

Free Lookup for Zip Code, Area code, city, state, time zone, home sales, county and more.

International Postal Codes

Links to international postal code pages.

National Address Server

"Given a valid U.S. postal address, this server attempts to rewrite the address in the proper format along with the ZIP+4 code."

Postal Codes

Simple to use - just find the country you're interested in and type in the location that you need a code for.

Telephone Directories Online

Links to U.S., Canadian and worldwide telephone directories; also provides links to area code, toll-free and reverse lookup information.

Universal Postal Code Addressing Formats

Provides information on how to address a letter or postal item to different countries.

World Telephone Numbering Guide

Directory of telephone country codes, prefixes, and numbering systems.

Zip Code Lookup

Official United States Postal Service ZIP code lookup.