ICANN Registrars by TLD

Here is the list of all ICANN accredited registrars by TLD on 2010-02-02 (information retrieved on 2010-02-04). For each TLD, links will give you, the list of all registrars accredited for this TLD, data about the TLD registry operator, list of all registrars sorted by their domain names volume in this TLD including during time, and the list of all registrars sorted by their accreditation/deaccreditation dates in this TLD.
You can also get the list of registrars by country, or go back to the main page on ICANN registrars.

On average, registrars are accredited in 8.1 TLDs (standard deviation: 4.0).