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.
2025-08-19ARIN+ AddApparent reissuance of previously removed resourceStrong inference
ARIN-Issued
Add AS904
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it reserved on 2025-08-18 and assigned (dated 2025-08-19) on 2025-08-20. The tracker saw this range removed from registration on 2024-11-11 (AS904), so it appears to have been issued again from ARIN's pool.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2025-08-19: "Add AS904"source · retrieved
BeforeARIN delegated statistics 2025-08-18 (produced 2025-08-18T13:00:50+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2025-08-20 (produced 2025-08-20T13:00:51+00:00), after the report: assigned (dated 2025-08-19)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2025-08-19ARIN− RemoveChange to ARIN's own pool recordStrong inference
ARIN-Issued
Remove AS904
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2025-08-18 and assigned (dated 2025-08-19) on 2025-08-20. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS904. The issuance is explained on that line.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2025-08-19: "Remove AS904"source · retrieved
BeforeARIN delegated statistics 2025-08-18 (produced 2025-08-18T13:00:50+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2025-08-20 (produced 2025-08-20T13:00:51+00:00), after the report: assigned (dated 2025-08-19)source · retrieved
Classification history for this change (4 versions)
: Change to ARIN's own pool record, strong inference (classifier 1.3.0)
: Change to ARIN's own pool record, strong inference (classifier 1.3.1)
: Change to ARIN's own pool record, strong inference (classifier 1.3.2)
: Change to ARIN's own pool record, strong inference (classifier 1.4.0) current
2024-11-11ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2025-05-11. 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 2022-06-10) on 2024-11-10 and reserved on 2024-11-12. 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 2025-05-11. 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: AS904 assigned on 2024-11-11, reserved on 2024-11-12source · retrieved
BeforeARIN delegated statistics 2024-11-10 (produced 2024-11-10T14:00:51+00:00), before the report: assigned (dated 2022-06-10)source · retrieved
AfterARIN delegated statistics 2024-11-12 (produced 2024-11-12T14:00:54+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
2022-06-10ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add AS904
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it available on 2022-06-09 and assigned (dated 2022-06-10) on 2022-06-11. 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 2022-06-10: "Add AS904"source · retrieved
BeforeARIN delegated statistics 2022-06-09 (produced 2022-06-09T13:00:13+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2022-06-11 (produced 2022-06-11T13:00:08+00:00), after the report: assigned (dated 2022-06-10)source · retrieved
Classification history for this change (4 versions)