UDXF Utility Links Page
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Aeronautical
Aircraft Database
AirNav Page
Air Transport Association
Aviation@Landings: Aviation's Busiest Hub in Cyberspace
World Aeronautical Database
Clubs/DX Pages
Benelux DX-Club (BDXC-NL)
Bob Colyard's Utility DXing Web Page
DXA Home page
Michigan Area Radio Enthusiasts
Marius Rensen's HF-FAX pages
Longwave Home Page
Utilitarias DX Club (spanish)
UTDX
Utility Monitoring Central
Radio Reference
HF Archive
Maritime
Fairplay Publications
Globe Wireless Home Page
Marine Radiofacsimile Broadcast Schedules
Maritime Mobile Access & Retrieval System (MARS)
Maritime Radio Page
Seefunker
Military/Government
AFN
Scramble Air Force Databases Online!
DefenseLINK
Monitoring NASA Communications
Navy: Welcome Aboard
NIST Time and Frequency Division Homepage
State of the Russian Navy Data Page
The Army HomePage
United States Coast Guard
UHF Satcom
Miscellaneous
Radio HF Internet Newsletter
High Frequency Beacon Society
International Telecommunication Union (ITU)
Glossary of Radio Communications
IARU Monitoring System
Jane's Information Group
NSNET home page
Numbers & Oddities home page
Extreme worldwide scanner radio
Signals - The HF monitoring site
Strong Signals - Radio Monitoring At Its Finest
Utility Address- and QSL-page
UKQRM
Virtual Museum of Radio Communications
Propagation
hfradio.org - Propagation
Propagation
WM7D dot Net -> Hamradio -> Solar
Vendors
AirNav - The Aircraft Tracking Software for Windows
AOR UK
BlackCat Systems
Computer Aided Technologies - Scancat & Hoka Code-3
CombiTech - home of Mscan & Mscan Meteo
Computer-supported ShortWave Listening
DXtreme Software on the Web
ERGO Software
FineWare WWW Page
Grove Enterprises
Hoka Electronics
Hoka Electronics Italia - Luca Barbi
Klingenfuss Publications
Monitoring Times
PC Frequency Manager
RadioCom
Shoc RadioManager
SIGINT Systems
Signals Analyzer
Skyweb
Universal Radio, Inc.
Visual Radio