Dear colleagues,

The RIPE NCC is the operator of the e164.arpa zone (ENUM) and maintains the 
associate registry in accordance with the instructions of the Internet 
Architecture Board (IAB). As delegations are based on E.164 country code 
allocations, any changes to the registry are coordinated with and approved by 
the respective holders of the E.164 country code via the ITU’s 
Telecommunications Standardisation Bureau (TSB).

Recent checks have shown that over time, many of the current 57 delegations 
have deteriorated – they are no longer technically functional or the contacts 
details for the country code registry have not been updated.

Seeking advice from the IAB on these matters, they agreed to revise the 
instructions to address these issues. Among the changes is new text regarding 
the deletion of delegations and instructions that allow the RIPE NCC to do 
periodic checks on registry data.

This will allow us to initiate a process to review the existing delegations and 
coordinate with the registries, governments and the TSB to mitigate and correct 
any errors. In cases where we are unable to correct an error, we will advise 
the government involved to remove the delegation, until such time that a new 
registry can assume responsibility for the country code and restore its 
technical functionality.

ITU Study Group 2, which is responsible for the E.164 number registry, shared 
our concerns and at its last meeting agreed to update its instructions to the 
TSB to reflect these changes. As we remain committed to coordinating any 
delegations with TSB, the Member States involved and Study Group 2, we welcome 
the study group’s renewed interest in the topic and its support in reviewing 
and updating these registrations.

The new instructions have now been published on our website and, with the IAB’s 
approval, we will now operate the registry in accordance with these.

The instructions are available here: 
https://www.ripe.net/manage-ips-and-asns/dns/enum/iab-instructions


Kind Regards,

Marco Hogewoning
Senior External Relations Officer, RIPE NCC,

Ted Hardie

For the IAB

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