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​​​​​​​​​​​​​​DNIC Notification Form

Assignment of Data Network Identification Codes (DNIC) by the Administrations (According to Recommendation ITU-T X.121 (10/00))

• Notification Form for the assignment of Data Network Identification Codes (DNIC) by the Administrations

Note from the TSB

• The Recommendation ITU-T X.121 stipulates that th​e 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)​​
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• For information, the List of Data Country o​r 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.​