Online Reference - Zip Codes, Addresses, & E-mail Addresses

Zip Codes:

Free ZIP Code Lookup - You can enter a zip code and request the county name, time zone, MSA/PMSA code, area code, latitude/longitude, and congressional district.

ZIP Codes - U.S. - Zip plus 4 lookup, associate zip with place and vice versa, decipher postal abbreviations.

Addresses: (See also Telephone #)

Large E-mail address directories. Includes 411 Locate, Bigfoot, Email Finder, Addresses.com, InfoSpace and others from Free E-mail Address Directory.

PostInfo - Best part is the list by country of postal authorities around the world. Additional useful links include address formatting rules, and postal rate calculators for many countries

National Address Server Puts address in correct format with full zip code.