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.
2015-07-02ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN)
From
Sparta Inc. AESO ARIN
To
Parsons Corporation ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN) on 2015-07-02 19:42 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 2015-07-02 19:42 UTC, Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN); resources moved: 157.185.0.0/16source · retrieved
BeforeARIN delegated statistics 2015-07-01 (produced 2015-07-01T05:05:05+00:00), before the report: assigned (dated 1992-01-22)source · retrieved
AfterARIN delegated statistics 2015-07-03 (produced 2015-07-03T05:05:15+00:00), after the report: assigned (dated 1992-01-22)source · retrieved
Sold in pieces
2 pieces of this block transferred since 2008-12-01, 50% of it so far.
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.