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.
2022-01-05ARIN− RemoveChange to ARIN's own pool recordObserved only
ARIN-Issued
Remove 104.156.128.0-104.156.159.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2022-01-04 and allocated (dated 2022-01-05), available, reserved on 2022-01-06. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.156.128.0-104.156.131.255, 104.156.132.0-104.156.135.255, 104.156.136.0-104.156.139.255, 104.156.156.0-104.156.159.255. The issuance is explained on those lines. Another change to this range was reported the day before or after (2022-01-06: Remove 104.156.140.0-104.156.143.255; 2022-01-06: Add 104.156.140.0-104.156.143.255; 2022-01-06: Add 104.156.144.0-104.156.147.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2022-01-05: "Remove 104.156.128.0-104.156.159.255"source · retrieved
BeforeARIN delegated statistics 2022-01-04 (produced 2022-01-04T14:00:13+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2022-01-06 (produced 2022-01-06T14:00:13+00:00), after the report: allocated (dated 2022-01-05), available, 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
2021-01-04ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2021-03-05. 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 2014-07-15) on 2021-01-03 and reserved on 2021-01-05. 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 2021-03-05. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 104.156.128.0/19 assigned on 2021-01-04, reserved on 2021-01-05source · retrieved
BeforeARIN delegated statistics 2021-01-03 (produced 2021-01-03T15:00:13+00:00), before the report: assigned (dated 2014-07-15)source · retrieved
AfterARIN delegated statistics 2021-01-05 (produced 2021-01-05T15:00:13+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
2014-07-15ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add 104.156.128.0-104.156.159.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it available on 2014-07-14 and assigned (dated 2014-07-15) on 2014-07-16. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2014-07-15: "Add 104.156.128.0-104.156.159.255"source · retrieved
BeforeARIN delegated statistics 2014-07-14 (produced 2014-07-14T05:03:15+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2014-07-16 (produced 2014-07-16T05:03:31+00:00), after the report: assigned (dated 2014-07-15)source · retrieved
Classification history for this change (4 versions)
: Apparent new issuance, strong inference (classifier 1.3.2)
: Apparent new issuance, strong inference (classifier 1.4.0) current
2014-07-15ARIN− RemoveChange to ARIN's own pool recordStrong inference
ARIN-Issued
Remove 104.156.128.0-104.156.159.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it available on 2014-07-14 and assigned (dated 2014-07-15) on 2014-07-16. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.156.128.0-104.156.159.255. The issuance is explained on that line.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2014-07-15: "Remove 104.156.128.0-104.156.159.255"source · retrieved
BeforeARIN delegated statistics 2014-07-14 (produced 2014-07-14T05:03:15+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2014-07-16 (produced 2014-07-16T05:03:31+00:00), after the report: assigned (dated 2014-07-15)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
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.