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DNIC

The Recommendation ITU-T X.121 stipulates that the assignment of Data Country Codes (DCCs) is administered by the ITU. Assignment of network digits to create Data Network Identification Codes (DNICs) will be made by each Administration. The ITU/TSB is to be notified of any new assignments, re-allocations or removals of network digits by completing the notification form.
In accordance with Recommendation ITU-T X.121, details concerning the assignment of Data Network Identification Codes (DNICs) have been individually published in the ITU Operational Bulletin and then collected in a "List of Data Network Identification Codes (DNIC)".
In order to keep this List up-to-date, Administrations are requested to check the accuracy of the information published therein and to inform the TSB of any changes that should be made for its updating.
For any new assignment of Data Network Identification Codes (DNIC), Administrations should fill in the notification form and return it to the TSB.
For information, the List of Data Network Identification Codes (DNIC) is available on the ITU web site, free download:
https://www.itu.int/pub/T-SP-X.121B-2025
For updates to the List, see below numbered series of amendments published in the ITU Operational Bulletin:
Amd. 1: ITU OB No.1321 (1.VIII.2025) (Spain)

For information, the List of Data Country or Geographical Area Codes (DCCs) is available on the ITU web site, free download:
https://www.itu.int/pub/T-SP-X.121A-2011 and there was no changes since its last publication on 15 March 2011.