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.
2016-08-22ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: US Airways, Inc. (ARIN) to American Airlines Inc. (ARIN)
From
US Airways, Inc. ARIN
To
American Airlines Inc. ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from US Airways, Inc. (ARIN) to American Airlines Inc. (ARIN) on 2016-08-22 12:16 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 2016-08-22 12:16 UTC, US Airways, Inc. (ARIN) to American Airlines Inc. (ARIN); resources moved: AS53741source · retrieved
BeforeARIN delegated statistics 2016-08-21 (produced 2016-08-21T05:09:21+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2016-08-23 (produced 2016-08-23T05:08:55+00:00), after the report: assigned (dated 2011-05-09)source · retrieved
2015-10-13ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2016-04-13. 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 2011-05-09) on 2015-10-12 and reserved on 2015-10-14. 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 2016-04-13. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS53741 assigned on 2015-10-13, reserved on 2015-10-14source · retrieved
BeforeARIN delegated statistics 2015-10-12 (produced 2015-10-12T05:05:25+00:00), before the report: assigned (dated 2011-05-09)source · retrieved
AfterARIN delegated statistics 2015-10-14 (produced 2015-10-14T05:05:38+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
Transfer records (1)
Date (UTC)
Log
Type
Range moved
From
To
ARIN
Merger acquisition
AS53741
US Airways, Inc. ARIN
American Airlines Inc. 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.