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.
ARIN's transfer log records a transfer from Alchemy Software, Inc (ARIN) to CALIFORNIA ISO (ARIN) on 2018-11-09 18:52 UTC. ARIN-Issued lists it as "Add" because the registration changed hands; it is not a new allocation from ARIN.
Evidence (4) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2018-11-09: "Add 45.42.16.0-45.42.23.255"source · retrieved
Transfer logTransfer log: RESOURCE_TRANSFER on 2018-11-09 18:52 UTC, Alchemy Software, Inc (ARIN) to CALIFORNIA ISO (ARIN); resources moved: 45.42.16.0/21source · retrieved
BeforeARIN delegated statistics 2018-11-08 (produced 2018-11-08T06:00:12+00:00), before the report: assigned (dated 2015-02-11)source · retrieved
AfterARIN delegated statistics 2018-11-10 (produced 2018-11-10T06:00:12+00:00), after the report: assigned (dated 2018-11-09)source · retrieved
Classification history for this change (4 versions)
: Intra-ARIN transfer, confirmed (classifier 1.4.0) current
2015-02-11ARIN+ AddApparent reissuance of previously removed resourceStrong inference
ARIN-Issued
Add 45.42.16.0-45.42.23.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it available on 2015-02-10 and assigned (dated 2015-02-11) on 2015-02-12. The tracker saw this range released from hold on 2011-08-03 (45.2.0.0-45.255.255.255), so it appears to have been issued again from ARIN's pool.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2015-02-11: "Add 45.42.16.0-45.42.23.255"source · retrieved
BeforeARIN delegated statistics 2015-02-10 (produced 2015-02-10T06:05:34+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2015-02-12 (produced 2015-02-12T06:05:54+00:00), after the report: assigned (dated 2015-02-11)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2015-02-11ARIN− RemoveChange to ARIN's own pool recordStrong inference
ARIN-Issued
Remove 45.42.16.0-45.42.23.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it available on 2015-02-10 and assigned (dated 2015-02-11) on 2015-02-12. ARIN removed its own pool record for this range as part of issuing it: the same report adds 45.42.16.0-45.42.23.255. The issuance is explained on that line.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2015-02-11: "Remove 45.42.16.0-45.42.23.255"source · retrieved
BeforeARIN delegated statistics 2015-02-10 (produced 2015-02-10T06:05:34+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2015-02-12 (produced 2015-02-12T06:05:54+00:00), after the report: assigned (dated 2015-02-11)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
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.