Postal/Telephone Codes

All Area Codes (U.S. & Canada)
http://www.allareacodes.com/
Publisher: AllAreaCodes.com

Area Code Facts
http://areacodefacts.com/
Publisher: AreaCodeFacts.com

Canadian Postal Code Look-Up Service
http://www.westminster.ca/
Publisher: Westminster International

Infobel World - Telephone Directories
http://www.infobel.com/teldir/
Publisher: Kapitol

International Calling Codes
http://www.the-acr.com/codes/cntrycd.htm
Publisher: American Computer Resources

International Country Codes
http://countrycode.org/
Publisher: Steve Kropla

International Mailing Address Formats
http://www.bitboost.com/ref/international-address-formats.html
Publisher: BitBoost Systems

Postage Rates Worldwide
http://www.atms.ch/rates/
Publisher: Markus Seitz, Luzern, Switzerland

Universal Postal Union (UPU)
http://www.upu.int/
Publisher: International Postal Union