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.
2025-06-25ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: ALSCO (ARIN) to ALSCO (ARIN)
From
ALSCO ARIN
To
ALSCO ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from ALSCO (ARIN) to ALSCO (ARIN) on 2025-06-25 14:48 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.
Evidence (3) · classifier 1.4.0,
Transfer logTransfer log: MERGER_ACQUISITION on 2025-06-25 14:48 UTC, ALSCO (ARIN) to ALSCO (ARIN); resources moved: AS29775source · retrieved
BeforeARIN delegated statistics 2025-06-24 (produced 2025-06-24T13:01:14+00:00), before the report: assigned (dated 2019-01-16)source · retrieved
AfterARIN delegated statistics 2025-06-26 (produced 2025-06-26T13:01:12+00:00), after the report: assigned (dated 2019-01-16)source · retrieved
2019-01-16ARIN+ AddApparent reissuance of previously removed resourceStrong inference
ARIN-Issued
Add AS29775
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it reserved on 2019-01-15 and assigned (dated 2019-01-16) on 2019-01-17. The tracker saw this range removed from registration on 2018-10-11 (AS29775), so it appears to have been issued again from ARIN's pool.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2019-01-16: "Add AS29775"source · retrieved
BeforeARIN delegated statistics 2019-01-15 (produced 2019-01-15T06:00:11+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2019-01-17 (produced 2019-01-17T06:00:17+00:00), after the report: assigned (dated 2019-01-16)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2019-01-16ARIN− RemoveChange to ARIN's own pool recordStrong inference
ARIN-Issued
Remove AS29775
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2019-01-15 and assigned (dated 2019-01-16) on 2019-01-17. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS29775. The issuance is explained on that line.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2019-01-16: "Remove AS29775"source · retrieved
BeforeARIN delegated statistics 2019-01-15 (produced 2019-01-15T06:00:11+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2019-01-17 (produced 2019-01-17T06:00:17+00:00), after the report: assigned (dated 2019-01-16)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
2018-10-11ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2019-04-11. 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 2011-06-30) on 2018-10-10 and reserved on 2018-10-12. 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 2019-04-11. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS29775 assigned on 2018-10-11, reserved on 2018-10-12source · retrieved
BeforeARIN delegated statistics 2018-10-10 (produced 2018-10-10T05:00:17+00:00), before the report: assigned (dated 2011-06-30)source · retrieved
AfterARIN delegated statistics 2018-10-12 (produced 2018-10-12T05:00:15+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
2010-12-29ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2011-06-29. 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 allocated (dated 2003-05-02) on 2010-12-28 and not issued on 2010-12-30. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2011-06-29. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS29775 allocated on 2010-12-29, not listed on 2010-12-30source · retrieved
BeforeARIN delegated statistics 2010-12-28, before the report: allocated (dated 2003-05-02)source · retrieved
AfterARIN delegated statistics 2010-12-30, after the report: not issuedsource · 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
Transfer records (1)
Date (UTC)
Log
Type
Range moved
From
To
ARIN
Merger acquisition
AS29775
ALSCO ARIN
ALSCO ARIN
Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this ASN (ARIN's from 2009, the RIPE NCC's from 2012, APNIC's from 2010, LACNIC's from 2016, AFRINIC's from 2018). A transfer between two registries is in both logs.
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.