There are a number of restrictions on the names that can be registered in .tel. Some of these are contractual requirements from ICANN and others are a matter of Telnic policy. Names which are reserved on behalf of ICANN are not available at the second level and at all other levels within the TLD at which Telnic makes registrations. Further details on the use of reserved names in .tel can be found in Appendix 6 of Telnic's registry agreement with ICANN. This is published on the ICANN web site at http://www.icann.org/en/tlds/agreements/tel/appendix-6-07apr06.htm.
The list of ICANN defined reserved names can be found here. In addition to this list, all labels consisting of one ASCII character are reserved at the second level. The names of all current Top-Level Domains in the IANA database are reserved. The list of these names can be found at http://data.iana.org/TLD/tlds-alpha-by-domain.txt.
ICANN requires Telnic to reserve names of territories, distinct economies, and other geographic and geopolitical names. This list of reserved geopolitical names can be found here. This list changed over time in line with the ICANN requirements. Some names could have been registered by customers before they appeared on the reserved list. Such names will remain active and renewable, but should they ever expire and be deleted, registration requests for these names will be rejected.
It is not possible to register domain names that do not comply with Telnic's naming policy. These registration requests will be rejected by the Shared Registry System (SRS). The .tel naming standard is documented in Section 3 of Telnic's Acceptable Use Policy (AUP). In summary, names in .tel must:
In addition, Telnic has a small list of names that it has reserved for itself. This list was compiled following consultation with Telnic's Interim Policy Advisory Group (iPAG). The names on this reserved list relate to the operation of the registry and the .tel system as a whole. Some are concerned with new features and components of the .tel system that are expected to be introduced following the launch of .tel. Therefore this list remains company confidential.