Three-letter codes that have already been registered, or which cannot be registered due to contractual obligations between SITA and ICANN, have not been released as part of this process.
The total number of airports that has registered three-letter codes is 237, out of which 10 were registered after the codes release in December 2008.
The total number of registrations of three-letter codes from non-airports is 390. These registrations were effected before the codes became reserved back in 2002 and also after the codes release in December 2008.
Sixty-one three-letter codes were registered by non-airport customers between 1 December 2008 and 28 February 2009, compared to only 10 codes registered by airports during the same period. The highest number of registrations effected after the codes were released has been within the registrant groups of aviation suppliers and service providers, airlines, and aerospace companies.