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.
2015-11-19APNIC+ RegisteredApparent reissuance of previously removed resourceStrong inference
Statistics
175.158.96.0/22 available on 2015-11-19, allocated on 2015-11-20
Inventory
Likely issued from APNIC-controlled inventory
No transfer record matches. APNIC's statistics show it available on 2015-11-19 and allocated (dated 2015-11-19) on 2015-11-20. The tracker saw this range released from hold on 2015-10-28 (175.158.96.0/21), so it appears to have been issued again from APNIC's pool.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 175.158.96.0/22 available on 2015-11-19, allocated on 2015-11-20source · retrieved
BeforeAPNIC delegated statistics 2015-11-19, before the change: availablesource · retrieved
AfterAPNIC delegated statistics 2015-11-20, after the change: allocated (dated 2015-11-19)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2012-04-02APNIC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Statistics
175.158.96.0/22 allocated on 2012-04-02, reserved on 2012-04-03
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 2010-01-20) on 2012-04-02 and reserved on 2012-04-03. 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: 175.158.96.0/22 allocated on 2012-04-02, reserved on 2012-04-03source · retrieved
BeforeAPNIC delegated statistics 2012-04-02, before the change: allocated (dated 2010-01-20)source · retrieved
AfterAPNIC delegated statistics 2012-04-03, after the change: 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
2010-01-20APNIC+ RegisteredUnresolved changeObserved only
Statistics
175.158.96.0/22 not listed on 2010-01-20, allocated on 2010-01-21
Inventory
Inventory effect unknown
No transfer record matches. APNIC's statistics show it not listed on 2010-01-20 and allocated (dated 2010-01-20) on 2010-01-21. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 175.158.96.0/22 not listed on 2010-01-20, allocated on 2010-01-21source · retrieved
BeforeAPNIC delegated statistics 2010-01-20, before the change: not listedsource · retrieved
AfterAPNIC delegated statistics 2010-01-21, after the change: allocated (dated 2010-01-20)source · retrieved
Classification history for this change (4 versions)
: Unresolved change, observed only (classifier 1.3.0)
: Unresolved change, observed only (classifier 1.3.1)
: Unresolved change, observed only (classifier 1.3.2)
: Unresolved change, observed only (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.