ARRL headquarters office in Newington, Connecticut. General amateur radio information, membership information, news, events schedule, coordinating organizations.

Founded in 1921. Site offers organization details, operating information for visitors, clubs, repeaters, awards, beacons and contact details.

Canadian HQ features rules and regulations, club information, contest schedules and links.

Resource of amateur radio and technical information, plus a bookshop and links.

Offers organizational information, clubstation and licencing information, download area, a callsign search, bandplan details and news. [English, German]

Provides information about membership, contests, forums, events, licensing and regulatory matters, searches and regulations.

JARL offers regional and organizational news, WSL bureau, membership information, licencing requirements and applications, activities and related information.

Offers information on membership, awards program, regulations, activities and contact details.

Provides news, licence information, membership, callbook and a bookstore.

Information on contest station, the country and the organization.