The U.S. National Level
ARRL - the U.S. national association for amateur radio
FCC (U.S. Federal Communications Commission)
Support organizations and sites
Amateur radio practice exams - HamExam.org
eHam.net - a web site providing numerous resources and references for amateur radio
Contesting
Contest Calendar - provided by WA7BNM
General interest
AC6VV's Amateur Radio and DX Reference Guide
The history of telecommunications - a useful reference guide of historical facts
Origin of our club's call sign W6KA: Thomas Edison Nikirk, Boy Scout and Amateur Radio Operator
Kaiser Permanente Amateur Radio Network
Become a storm spotter from home
Amateur Radio and Emergency Communications - an introduction for beginners
Some vendor/commercial links
Ham Radio Outlet — store in Anaheim
Buyer of amateur radio estates/collections
Field Components, Inc. — coaxial cables, connectors, and other components