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 Sematech, Inc. (ARIN) to SECURED SERVERS LLC (ARIN) on 2015-05-08 17:20 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 2015-05-08: "Add 131.153.0.0-131.153.255.255"source · retrieved
Transfer logTransfer log: RESOURCE_TRANSFER on 2015-05-08 17:20 UTC, Sematech, Inc. (ARIN) to SECURED SERVERS LLC (ARIN); resources moved: 131.153.0.0/16source · retrieved
BeforeARIN delegated statistics 2015-05-07 (produced 2015-05-07T05:04:48+00:00), before the report: assigned (dated 1988-11-29)source · retrieved
AfterARIN delegated statistics 2015-05-09 (produced 2015-05-09T05:05:37+00:00), after the report: allocated (dated 2015-05-08)source · retrieved
Classification history for this change (4 versions)
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.