Amateur
- 481
- N2HJD Repeater Megaplex
- Robert Shewell shares information and details of the multi-site and cross-linked repeater system he operates in the Rochester, New York area. Covers six bands and includes an IRLP gateway.
- 482
- NQ4Y.net Tennessee Linked Repeater Network
- Resource offers regional repeater information, station photos and links.
- 483
- Northern Tier Repeater System
- Northern Pennsylvania club. Amateur radio club located in North Central Pennsylvania with four repeaters covering a two-county area.
- 484
- Pikes Peak FM Association
- Information about club's repeaters on Pikes Peak and other information about the club. Located in Colorado Springs, Colorado, United States.
- 485
- Portland Repeater Group
- Includes club and membership information, repeater information, event schedule, and links. Portland, Maine, United States.
- 486
- Repeater Society of Middle Tennessee
- Nashville-area repeater on 146.67 MHz. Member information and news.
- 487
- Saddleback Repeater Association
- Includes club news, events, and membership information, repeater frequencies, and photos. Rochester, New Hampshire.
- 488
- San Diego Repeater Association
- Provides repeater coverage in San Diego and Imperial County in Southern California, as well as Baja, California. Call sign, location, and frequency information.
- 489
- South Yorkshire Repeated Group
- Radio enthusiasts in Yorkshire present news, local activities reports and how to join. United Kingdom.
- 490
- SouthEastern Repeater Association, Inc.
- Organization coordinates repeaters in Kentucky, Mississippi, North Carolina, South Carolina, Virginia, Tennessee, West Virginia, and Georgia.
- 491
- Southern California Repeater Lists
- Lists repeater frequencies of repeaters in Southern California.
- 492
- Southern California Repeater and Remote Base Association
- Provides coordination of a number of heavily utilized amateur radio frequency bands in Southern California. Contains repeater list, band plan and mission statement.
- 493
- Suburban Amateur Repeater Association
- Based in Lake County, Illinois, the core repeaters are located near Lake Zurich. Features membership information and events schedule. United States.
- 494
- The Condor Connection
- An integrated network of privately owned repeaters, the system covers most of California from below the Mexican border to north central California, and parts of Arizona and Nevada. Includes list of repeaters, system information, net details and items for sale.
- 495
- W1YX/R
- Brad Armstrong shares information on the 147.18 repeater located in Monroe County, New York. He includes technical details, photographs, operating tips, updates and links.
- 496
- 50 MHz & Up Group of Northern California
- An educational and public service amateur radio organization centered in the San Francisco Bay area, interested in developing and utilizing communications on frequencies from 50MHz up through light-waves.
- 497
- AB4FK
- Flying Boat Amateur Radio Society with membership information, member listing, net schedules, membership e-mail addresses, and photos.
- 498
- Edge of Space Sciences, Inc.
- EOSS is a volunteer organization with expertise in the process of flying stratospheric high altitude helium balloons, and promoting science and education through high-altitude balloons and amateur radio. Includes flight schedules, radio frequency information, general program data, net and meeting details. Denver, Colorado, United States.