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.
2010-09-24ARIN− RemoveUnresolved changeObserved only
ARIN-Issued
Remove 142.54.202.0-142.54.255.255
Inventory
Inventory effect unknown
No transfer record matches. ARIN's statistics show it assigned (dated 1991-05-13) on 2010-09-23 and assigned (dated 1991-05-13), not issued on 2010-09-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) The range is only partly registered on one side, so the tracker doesn't draw a conclusion.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2010-09-24: "Remove 142.54.202.0-142.54.255.255"source · retrieved
BeforeARIN delegated statistics 2010-09-23, before the report: assigned (dated 1991-05-13)source · retrieved
AfterARIN delegated statistics 2010-09-25, after the report: assigned (dated 1991-05-13), not issuedsource · retrieved
Classification history for this change (4 versions)
: Unresolved change, observed only (classifier 1.3.0)
: Unresolved change, observed only (classifier 1.3.1)
: Unresolved change, observed only (classifier 1.3.2)
: Unresolved change, observed only (classifier 1.4.0) current
Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv4 range (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.