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.
2019-07-12ARIN+ AddApparent reissuance of previously removed resourceStrong inference
ARIN-Issued
Add 192.138.163.0-192.138.163.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it reserved on 2019-07-11 and allocated (dated 2019-07-12) on 2019-07-13. The tracker saw this range removed from registration on 2018-07-10 (192.138.163.0/24), so it appears to have been issued again from ARIN's pool.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2019-07-12: "Add 192.138.163.0-192.138.163.255"source · retrieved
BeforeARIN delegated statistics 2019-07-11 (produced 2019-07-11T14:00:16+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2019-07-13 (produced 2019-07-13T15:55:23+00:00), after the report: allocated (dated 2019-07-12)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2019-07-12ARIN− RemoveChange to ARIN's own pool recordStrong inference
ARIN-Issued
Remove 192.138.163.0-192.138.163.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2019-07-11 and allocated (dated 2019-07-12) on 2019-07-13. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.138.163.0-192.138.163.255. The issuance is explained on that line.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2019-07-12: "Remove 192.138.163.0-192.138.163.255"source · retrieved
BeforeARIN delegated statistics 2019-07-11 (produced 2019-07-11T14:00:16+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2019-07-13 (produced 2019-07-13T15:55:23+00:00), after the report: allocated (dated 2019-07-12)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
2018-07-10ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2018-09-08. 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 1992-01-10) on 2018-07-09 and reserved on 2018-07-11. 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 2018-09-08. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 192.138.163.0/24 assigned on 2018-07-10, reserved on 2018-07-11source · retrieved
BeforeARIN delegated statistics 2018-07-09 (produced 2018-07-09T05:00:24+00:00), before the report: assigned (dated 1992-01-10)source · retrieved
AfterARIN delegated statistics 2018-07-11 (produced 2018-07-11T05:00:24+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
Transfer records
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.