ZIP Code - Wikipedia

China, Maine - Wikipedia

List of California area codes - Wikipedia

ZIP code - Simple English Wikipedia, the free encyclopedia

Area codes 602, 480, and 623 - Wikipedia

Postal codes in Slovakia - Wikipedia

Keeping Truth Alive In A World Of Anonymous Wikipedia Edits

File:Map of Russian postal codes.svg - Wikipedia

Mr. ZIP - Wikipedia

Wikipedia Plus

Blacked Out Wikipedia Homepage protesting SOPA and PIPA Stock Photo - Alamy

Postal codes in Spain - Wikipedia

File:City of Troy map 2.svg - Wikipedia