Postal/Telephone Codes

All Area Codes (U.S. & Canada)
Publisher: AllAreaCodes.com

Area Code Facts
Publisher: AreaCodeFacts.com

Canadian Postal Code Look-Up Service
Publisher: Westminster International

Infobel World - Telephone Directories
Publisher: Kapitol

International Calling Codes
Publisher: American Computer Resources

International Country Codes
Publisher: Steve Kropla

International Mailing Address Formats
Publisher: BitBoost Systems

Postage Rates Worldwide
Publisher: Markus Seitz, Luzern, Switzerland

Universal Postal Union (UPU)
Publisher: International Postal Union