Home of the world's largest radio/scanner frequency database. Celebrating 28 years of no ads and no subscriber fees.
This service dates back to the BBS days.
A directory of shortwave listening frequencies around the world.
Shortwave Listening Tips:
Need some help finding frequencies for your iPod to transmit to your car on? Look here first!
The database of radio scanner frequencies at radioreference.com. Curious about what's happening in your area? Tune in and give a listen.
The ARRL's official amateur radio bandplan reference.
A wiki page that documents explanations for and origins of various types of radio broadcasts people picked up with software defined radios and analyzed with software like GQRX.
FrequencyCheck is a website that helps you determine if your current cellphone will work on the cellular networks of a particular country. You can either search for devices compatible with a particular carrier, or carriers compatible with a certain mobile device.