ARIN reserves one holder's ASN and two IPv6 allocations together

ARIN Issued One Holder an ASN and Two IPv6 Blocks on Christmas Eve. All Three Are Reserved Now.

Why it matters

ARIN's 2 November ledger tied AS402109 and two IPv6 allocations to one holder identifier, each dated 24 December 2025. Its 3 November ledger moved the ASN and both blocks into the reserved column. Three resources crossed together; the public file records the result without naming the transaction that produced it.

Theo March3 November 2026Reading Time 2 minLast update: 3 November 2026

ARIN’s adjacent daily files move one ASN and two IPv6 blocks with a shared prior holder identifier into reserved status.

Summary

ARIN's 2 November extended ledger lists AS402109 as assigned and 2001:506:3a::/48 and 2604:d860::/32 as allocated. All three share one holder identifier and the date 24 December 2025.
The 3 November ledger records those exact three resources as reserved, with the earlier holder identifier and issuance dates absent.

One account entry held three very different pieces of the Internet's numbering system. In the earlier file the ASN row, the /48 row and the /32 row all end in fcb7a9d80400bc555f1c111233cc5e4b. That string is ARIN's opaque holder identifier, and each row carries 20251224. The next file replaces each with a reserved row for the identical resource. A single day's public ledger therefore changes an AS number and two IPv6 prefixes together, without splitting either address block.

The official extended-file specification says records with one identifier within the same file belong to one resource holder. It defines reserved as neither assigned nor allocated and unavailable for issue. The identifier can change between file versions, so the link that matters is already present within the 2 November snapshot. The three successor rows have no holder field to compare.

ARIN's resource request guide describes several ways issued IPv6 space and ASNs can come back: voluntary return, revocation and reclaim. It says those resources are held six months before reissue. The daily ledger does not say which process produced this three-resource change. A dated resource-action or account record would settle that question.