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.
2018-09-10ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add 192.188.81.0-192.188.81.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it reserved on 2018-09-09 and assigned (dated 2018-09-10) on 2018-09-11. 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 2018-09-10: "Add 192.188.81.0-192.188.81.255"source · retrieved
BeforeARIN delegated statistics 2018-09-09 (produced 2018-09-09T05:00:16+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2018-09-11 (produced 2018-09-11T05:00:17+00:00), after the report: assigned (dated 2018-09-10)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
2018-09-10ARIN− RemoveChange to ARIN's own pool recordStrong inference
ARIN-Issued
Remove 192.188.81.0-192.188.81.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2018-09-09 and assigned (dated 2018-09-10) on 2018-09-11. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.188.81.0-192.188.81.255. The issuance is explained on that line.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2018-09-10: "Remove 192.188.81.0-192.188.81.255"source · retrieved
BeforeARIN delegated statistics 2018-09-09 (produced 2018-09-09T05:00:16+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2018-09-11 (produced 2018-09-11T05:00:17+00:00), after the report: assigned (dated 2018-09-10)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
2010-12-21APNIC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Observed only
Statistics
192.188.81.0/24 allocated on 2010-12-21, not listed on 2010-12-22
Inventory
Possible future reissue candidate after hold
Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2008-05-09) on 2010-12-21 and not listed on 2010-12-22. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, and its statistics show a steady one (a year) only for removals from 2014-07-01 on; this one came earlier, so the tracker gives no estimate. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 192.188.81.0/24 allocated on 2010-12-21, not listed on 2010-12-22source · retrieved
BeforeAPNIC delegated statistics 2010-12-21, before the change: allocated (dated 2008-05-09)source · retrieved
AfterAPNIC delegated statistics 2010-12-22, after the change: not listedsource · retrieved
Classification history for this change (4 versions)
: Removed (return, revocation or reclamation not publicly distinguishable), observed only (classifier 1.3.0)
: Removed (return, revocation or reclamation not publicly distinguishable), observed only (classifier 1.3.1)
: Removed (return, revocation or reclamation not publicly distinguishable), observed only (classifier 1.3.2)
: Removed (return, revocation or reclamation not publicly distinguishable), observed only (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.