- 3905 Century Club - offers a guide to net operations including schedules, QSL bureaus, and awards.
- Amateur Communications Emergency Services (ACES) -
- Amateur Radio Emergency Service (ARES/RACES) (11) -
- 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.
- Brooklyn Heights Amateur Radio Club (BHARC) - part of the N2HDW repeater network for New York and New Jersey.
- CEPT Amateur Radio Club (5P1ER) -
- Chicago Amateur Radio Club, Inc. - includes a calendar of events and photos.
- Condor Connection -
- 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.
- 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.
- Midwest Country Cousins Amateur Radio Network - mateur ham radio club broadcasting every night at 9:30 U.S. Central time.
- 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.
- Old China Hands - group of radio amateurs that served in the China, Burma, India Theater before, during, and shortly after WWII.
- 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 Information Network (RAIN) - audio news broadcast of ham radio topics in the ToolVox format.
- Radio Amateur Satellite Corporation (AMSAT)@ -
- Rainbow Amateur Radio Association - international organization for gay & lesbian ham radio enthusiasts.
- REACT International, Inc. (3) -
- Steel City Amateur Radio Club - Carnegie, PA - details of events, activities, members, technical information, and more.
- U.S. Navy-Marine Corps MARS - volunteer organization that is an adjunct of Naval Communications, whose motto is: "Serving Those Who Serve".
- 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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