- 3905 Century Club
 - Offers a guide to net operations including schedules, QSL bureaus, and awards.  Aberdeen Amateur Radio Society
- Amateur Communications Emergency Services (ACES)
- Amateur Radio Emergency Service (ARES/RACES) (6)
- Amateur Radio in Bristol
- Amateur Radio Research and Development Corporation
- Works in development of packet radio and spread spectrum techniques used in amateur radio.
- American Radio Relay League (ARRL) (3)
- Association of North American Radio Clubs
- Shortwave broadcast monitoring, pirate radio, scanning.
- Bracknell Amateur Radio Club
- Brooklyn Heights Amateur Radio Club (BHARC)
- Part of the N2HDW repeater network for New York and New Jersey.
- Cambridgeshire Repeater Group
- Includes information on amateur radio in the Cambridgeshire area.
- CEPT Amateur Radio Club (5P1ER)
- Condor Connection
 Cork Radio Club
- Dundee Amateur Radio Club
- Provides meeting details, club history, pictures, and news.
- Guernsey Amateur Radio Society
- Club which welcomes visitors.
- Hackpen White Horse Radio & Social Club
- Provides details on the club and information for radio enthusiasts.
- Ham Radio India
- Gateway to Indian Radio Amateurs. Resource features Indian amateur news, photos, circuits, articles, downloads, message boards, and discussion forums.
- High Frequency Co-ordination Committee (HFCC)
- Group active in informal co-ordination of short wave frequency channels.
- International Amateur Radio Union
- International Radio Club of America (IRCA)
- Devoted to the hobby of hearing distant stations on the standard AM broadcast band.
- Irish Radio Transmitter Society (IRTS)
- Member Society for Ireland of the International Amateur Radio Union.
- Lake of the Ozarks Amateur Radio Club
- Serves the lake area including Osage Beach, Laurie, and Eldon.
- Lambda Amateur Radio Club
- International club for gay and lesbian amateur "ham" radio enthusiasts.
- Medical Amateur Radio Council (MARCO)
- Membership information, roster, medical resources sharing, newsletter, net schedule, and more...
- Mich-A-Con Amateur Radio Club
- Offers membership, meetings, news, and activities for enthusiasts.
- Motor City Radio Club
- An amateur radio operators club provides emergency preparedness programme, ARES, technical classes, community services, and training for new members. Motor City Radio Club is affiliated with American Radio Relay League (ARRL).
- Murgas Amateur Radio Club - K3YTL
- Offers VHF contesting, packet radio, DX, satellites, ATV, repeaters, hamfest, and more.
- NASWeb
- Site provides club members and non-members alike with timely information about developments in the shortwave radio hobby.
- Newbury and District Amateur Radio Society (NADARS)
- Outer Banks Repeater Association
- Group of ham radio enthusiasts with several repeaters and ATV stations in the Nags Head, Kitty Hawk, and Manteo area.
- Penang YMCA ARC-9M2YMC
- Amateur radio club. Includes club activities, repeater, and frequency information.
- Radio Amateur Satellite Corporation (AMSAT)@
- Browse sites about the worldwide group of amateur radio operators who share an active interest in building, launching, and then communicating with each other through noncommercial amateur radio satellites.
- Radio Society of Great Britain (RSGB)
- Promotes the amateur radio hobby, allowing millions of people worldwide to communicate with each other.
- Rainbow Amateur Radio Association
- International organisation for gay & lesbian ham radio enthusiasts.
- REACT International, Inc. (3)
- Reading and District Amateur Radio Club
- For all radio amateurs in and around Berkshire and the Thames Valley; callsigns G3ULT and M0AAA.
- Royal Air Force Amateur Radio Society
- Latest news and information on the society.
- Royal Signals Amateur Radio Society
- Details of membership, nets, awards, and latest news.
- South Notts Amateur Radio Club
- Steel City Amateur Radio Club - Carnegie, PA
- Details of events, activities, members, technical information, and more.
- Tír Conaill Amateur Radio Society
- U.S. Navy-Marine Corps MARS
- Volunteer organisation that is an adjunct of Naval Communications, whose motto is: "Serving Those Who Serve".
- United Kingdom Radio Society
- For all persons interested in amateur radio, whether licensed or not.
- Virginia Beach Amateur Radio Club (VBARC)
- Dedicated to ham and amateur radio enthusiasts with information about the club and its events.
- W5AC - Texas A&M University
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