Dear Ruben et al, Thank you for this helpful input. This is exactly the kind of information the RIPE NCC is trying to gather as part of the current review of Public ENUM in e164.arpa. It also shows why we cannot rely only on Tier-0 query volumes or on whether delegations formally exist. The more complete operational picture lives at the Tier-1 level and below, where national delegations are actually managed and where any reliance on the infrastructure would be visible. We appreciate the clarification that 1.3.e164.arpa remains maintained, that the contact information is current, that DNSSEC is in place, and that revocation is not being sought. We will follow up with ISOC NL and SURF soon to better understand the use cases and any further information that could help inform the review. Kind regards, Hisham Ibrahim RIPE NCC On Sat, 2 May 2026 at 16:40, Ruben Brave <brave@entelligence.nl> wrote:

Dear Hisham, dear colleagues,

Thank you for the continued transparency around this process, and for your 6 April update acknowledging that framing this discussion primarily in terms of closure is premature. We agree, and would like to contribute the perspective that has so far been missing from this thread: that of an active national delegating authority.

Internet Society Netherlands (ISOC NL) holds the delegation for *1.3.e164.arpa*, covering the Dutch country code (+31), with SURF providing the technical infrastructure. The delegation is operationally sound, contact information is current, and DNSSEC is in place. We do not intend to request revocation.

More importantly, we are actively exploring forward-looking applications for the +31 delegation. The principle at the heart of ENUM, linking a regulated, government-authorised numbering resource to verifiable Internet identifiers through a standards-based, DNSSEC-signed framework, is gaining renewed relevance in the context of the IP interconnection transition, DNS-based identity verification, and European digital identity frameworks. We are engaged with national stakeholders, including the Dutch Ministry of Economic Affairs and Climate Policy (EZK), to assess how this infrastructure can meet these emerging needs.

We therefore support Marco Hogewoning's call for further study before any conclusions are reached and specifically echo his point that low query volume at the Tier-0 level is a poor proxy for actual reliance on the ENUM protocol and national delegations. The relevant signal is at the Tier-1 level and below, which is precisely where active national delegations like ours operate.

We look forward to the RIPE 92 session and would welcome the opportunity to contribute the Dutch delegating authority's perspective directly. We are also happy to coordinate with RIPE NCC and SURF on providing more granular usage data from 1.3.e164.arpa specifically, if that would support a more complete factual basis for this discussion.

Met vriendelijke groet, Kind regards,

Ruben Brave <http://www.rubenbrave.com/> Chairman (voorzitter@isoc.nl, +31 (0)6 53 868 270)

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Met vriendelijke groet, Kind regards,

<https://rubenbrave.com?promo=email_sig&utm_source=product&utm_medium=email_sig&utm_campaign=edit_panel&utm_content=thumb> Ruben Brave rubenbrave.com <https://rubenbrave.com?promo=email_sig&utm_source=product&utm_medium=email_sig&utm_campaign=edit_panel&utm_content=thumb> Ruben Brave <http://bit.ly/profile-rubenbrave> Managing Partner +31 (0)6 53 868 270 Entelligence bv <https://www.entelligence.nl/>, Keizersgracht 62, 1015 CS Amsterdam

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