I occasionally get this question, as many technical people don’t fully understand it.
A TLD is ‘actually” the last section of a URL (owned by the domain registrars themselves).
Examples:
- .com
- .net
- .org
- .us (and other 2 digit country codes)
You can find a full list of TLD’s here:
Various other TLD’s have been proposed through the years, here are a few common ones (that are in various states of approval or implementation):
- .museum
- .info
- .xxx
- .biz
- .mobi
References:
- http://tools.ietf.org/html/rfc2606
- http://www.icann.org/tlds/
- http://en.wikipedia.org/wiki/Top-level_domain
Cheers!