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.
2025-01-06ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2025-03-07. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 1994-07-07) on 2025-01-05 and reserved on 2025-01-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2025-03-07. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 204.52.188.0/24 allocated on 2025-01-06, reserved on 2025-01-07source · retrieved
BeforeARIN delegated statistics 2025-01-05 (produced 2025-01-05T14:01:06+00:00), before the report: allocated (dated 1994-07-07)source · retrieved
AfterARIN delegated statistics 2025-01-07 (produced 2025-01-07T14:01:08+00:00), after the report: reservedsource · retrieved
Classification history for this change (4 versions)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current
2023-09-28ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Millward Brown, Inc. (ARIN) to KANTAR (ARIN)
From
Millward Brown, Inc. ARIN
To
KANTAR ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from Millward Brown, Inc. (ARIN) to KANTAR (ARIN) on 2023-09-28 14:54 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 2023-09-28 14:54 UTC, Millward Brown, Inc. (ARIN) to KANTAR (ARIN); resources moved: 204.52.188.0/24source · retrieved
BeforeARIN delegated statistics 2023-09-27 (produced 2023-09-27T13:00:12+00:00), before the report: allocated (dated 1994-07-07)source · retrieved
AfterARIN delegated statistics 2023-09-29 (produced 2023-09-29T13:00:13+00:00), after the report: allocated (dated 1994-07-07)source · retrieved
Transfer records (1)
Date (UTC)
Log
Type
Range moved
From
To
ARIN
Merger acquisition
204.52.188.0/24
Millward Brown, Inc. ARIN
KANTAR ARIN
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.