You probably have a domain already, one that was given free by your ISP and it is bound to have their name tied into it. Far better to have your own trading name or your radio station's name, as the core of your web address, and your email addresses.
One of the most important aspects of promotion of any business is having your contact details easy to remember and especially your web address. Once you have decided on the name for your radio station, the next thing you should do is get a suitable web address.
If your radio station has a short name, or a common one, the chances of getting that as a domain, or URL, are much less than a made up name. If your radio station is 'GreatSounds' for example, you are more likely to find a suitable domain name than if its simply KISS FM as all the really useful 'KISS' URLs went some years ago. KissFM.com for example has been secured by iHeartRADIO, the biggest radio group in the USA. (If you were determined to use KISS FM however, there are many URLs possible by using a different 'suffix',- or 'top level domain'.
A Top Level Domain (TLD) is the last part of the URL. Instead of dotcom, how about “dot today”? There are dozens of suffixes in use. It's probably a good idea to avoid the cumbersome TLDs that don't trip off the tongue easilly. We've always been averse to TLDs that have too many 'dots' in the URL as getting just one of these in the wrong place will mean no one finds your radio station.
One of the rarer suffixes that is unlikely to be offered to you by regular ISPs is the 'dot FM' (.FM) suffix. The domain holders are one of the few who published a 'recently dropped' domain names list, so you can see what has suddenly become available once again. Plus of course, a dot FM suffix domain is one of the most ideal ones for a radio station, and the owners of the Dot FM company who issue these keep their domains exclusively for media companies.
Second Level Domains
There may be some interest in using a second level domain to make a suitable URL. The SLDs are a couple of letters immediately before the Top Level Doman, such as the 'co' letters in a URL ending .co.uk, or the 'acc' part of .ac.uk. They usually refer to the type of organisation - 'co' is short for commercial, or company, while 'ac' means an academic institution, such as college or university.
The 'dot FM' TLD registry are now offering dot FM domains at very special rates - see here. If the one you really want has gone, they now also have .radio.FM and .radio.AM domains available. There is a link to DOT FM in this logo where you can order your own eye catching name today.