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.
2025-10-06ARIN− RemoveChange to ARIN's own pool recordObserved only
ARIN-Issued
Remove 216.235.208.0-216.235.223.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06), reserved on 2025-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 216.235.212.0-216.235.215.255, 216.235.220.0-216.235.220.255, 216.235.223.0-216.235.223.255. The issuance is explained on those lines. Another change to this range was reported the day before or after (2025-10-07: Remove 216.235.221.0-216.235.221.255; 2025-10-07: Remove 216.235.222.0-216.235.222.255; 2025-10-07: Add 216.235.221.0-216.235.221.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2025-10-06: "Remove 216.235.208.0-216.235.223.255"source · retrieved
BeforeARIN delegated statistics 2025-10-05 (produced 2025-10-05T13:00:49+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2025-10-07 (produced 2025-10-07T13:00:46+00:00), after the report: allocated (dated 2025-10-06), reservedsource · retrieved
Classification history for this change (4 versions)
: Change to ARIN's own pool record, observed only (classifier 1.3.0)
: Change to ARIN's own pool record, observed only (classifier 1.3.1)
: Change to ARIN's own pool record, observed only (classifier 1.3.2)
: Change to ARIN's own pool record, observed only (classifier 1.4.0) current
2023-02-06ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2023-04-07. 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 1999-09-22) on 2023-02-05 and reserved on 2023-02-07. 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 2023-04-07. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 216.235.208.0/20 allocated on 2023-02-06, reserved on 2023-02-07source · retrieved
BeforeARIN delegated statistics 2023-02-05 (produced 2023-02-05T14:00:11+00:00), before the report: allocated (dated 1999-09-22)source · retrieved
AfterARIN delegated statistics 2023-02-07 (produced 2023-02-07T14:00:11+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
2016-02-09ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2016-04-09. 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 assigned (dated 1999-09-22) on 2016-02-08 and reserved on 2016-02-10. 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 2016-04-09. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 216.235.208.0/20 assigned on 2016-02-09, reserved on 2016-02-10source · retrieved
BeforeARIN delegated statistics 2016-02-08 (produced 2016-02-08T06:04:28+00:00), before the report: assigned (dated 1999-09-22)source · retrieved
AfterARIN delegated statistics 2016-02-10 (produced 2016-02-10T06:04:24+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
No transfer log has a transfer of any part of this IPv4 range.
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.