2026-03-08 (from ARIN's published rule; since mid-2024 ARIN has released many of these sooner)
Now
Possible reissue candidate; not confirmed available.
Timeline (2)
Every change the tracker has found, newest first. It covers ARIN from 2008-12-01, the RIPE NCC from 2010-04-23, APNIC from 2008-02-15, LACNIC from 2012-06-29 and AFRINIC from 2012-10-03.
2025-09-08ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2026-03-08. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2024-04-04) on 2025-09-07 and reserved on 2025-09-09. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2026-03-08. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS400955 assigned on 2025-09-08, reserved on 2025-09-09source · retrieved
BeforeARIN delegated statistics 2025-09-07 (produced 2025-09-07T13:00:51+00:00), before the report: assigned (dated 2024-04-04)source · retrieved
AfterARIN delegated statistics 2025-09-09 (produced 2025-09-09T13:00:50+00:00), after the report: reservedsource · retrieved
Classification history for this change (4 versions)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current
2024-04-04ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add AS400955
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it available on 2024-04-03 and assigned (dated 2024-04-04) on 2024-04-05. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2024-04-04: "Add AS400955"source · retrieved
BeforeARIN delegated statistics 2024-04-03 (produced 2024-04-03T13:00:50+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2024-04-05 (produced 2024-04-05T13:00:46+00:00), after the report: assigned (dated 2024-04-04)source · retrieved
Classification history for this change (4 versions)
: Apparent new issuance, strong inference (classifier 1.3.0)
: Apparent new issuance, strong inference (classifier 1.3.1)
: Apparent new issuance, strong inference (classifier 1.3.2)
: Apparent new issuance, strong inference (classifier 1.4.0) current
Transfer records
No transfer log has a transfer of any part of this ASN.
RDAP lookups
Not looked up. The tracker queries RDAP for changes as they're reported (on first sight, after 24 hours and after seven days); older changes aren't looked up because today's RDAP says nothing about the past.