This data was last updated ago, at 2026-10-09 21:19 UTC. The site normally updates once a day, so the latest update didn't finish; recent changes may be missing.
ASN
AS399581
Now
ARIN statistics
Reserved on 2026-10-09
Registry
Not known
Holder
Not looked up
Latest change
− RemoveReleased from hold (ARIN lists it as 'available')
Possible reissue candidate; not confirmed available.
Timeline since 2026-01-01 (2)
2026-09-08− RemoveReleased from hold (ARIN lists it as 'available')Strong inference
ARIN-Issued
Remove AS399581
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed
ARIN's statistics show it reserved on 2026-09-07 and available on 2026-09-09. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2026-04-16, 145 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.
Evidence (3) · classifier 1.0.0,
ARIN-IssuedARIN-Issued report for 2026-09-08: "Remove AS399581"source · retrieved
BeforeARIN delegated statistics 2026-09-07 (produced 2026-09-07T13:00:21+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2026-09-09 (produced 2026-09-09T13:00:20+00:00), after the report: availablesource · retrieved
2026-04-16Not in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Earliest estimated hold expiration 2026-10-16. 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 2021-04-19) on 2026-04-15 and reserved on 2026-04-17. 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 earliest estimated hold expiration is 2026-10-16. This does not confirm availability.
Evidence (3) · classifier 1.0.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS399581 assigned on 2026-04-16, reserved on 2026-04-17source · retrieved
BeforeARIN delegated statistics 2026-04-15 (produced 2026-04-15T13:00:39+00:00), before the report: assigned (dated 2021-04-19)source · retrieved
AfterARIN delegated statistics 2026-04-17 (produced 2026-04-17T13:00:39+00:00), after the report: reservedsource · retrieved
Transfer records
ARIN's transfer log has no 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.