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.
2018-05-10ARIN− RemoveNo substantive resource change foundObserved only
ARIN-Issued
Remove 172.83.80.0-172.83.83.255
Inventory
No effect on ARIN applicant inventory
ARIN-Issued lists it as "Remove", but ARIN's statistics show the same record before and after (reserved). Another change to this range was reported the day before or after (2018-05-11: Remove 172.83.80.0-172.83.80.255; 2018-05-11: Remove 172.83.82.0-172.83.82.255; 2018-05-11: Add 172.83.80.0-172.83.80.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2018-05-10: "Remove 172.83.80.0-172.83.83.255"source · retrieved
BeforeARIN delegated statistics 2018-05-09 (produced 2018-05-09T05:11:17+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2018-05-11 (produced 2018-05-11T05:10:30+00:00), after the report: reservedsource · retrieved
Classification history for this change (4 versions)
: No substantive resource change found, observed only (classifier 1.3.0)
: No substantive resource change found, observed only (classifier 1.3.1)
: No substantive resource change found, observed only (classifier 1.3.2)
: No substantive resource change found, 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.