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.
2012-08-24APNIC+ RegisteredUnresolved changeObserved only
Statistics
164.161.0.0/16 not listed on 2012-08-24, allocated on 2012-08-25
Inventory
Inventory effect unknown
No transfer record matches. APNIC's statistics show it not listed on 2012-08-24 and allocated (dated 1993-03-19) on 2012-08-25. 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: 164.161.0.0/16 not listed on 2012-08-24, allocated on 2012-08-25source · retrieved
BeforeAPNIC delegated statistics 2012-08-24, before the change: not listedsource · retrieved
AfterAPNIC delegated statistics 2012-08-25, after the change: allocated (dated 1993-03-19)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
2012-08-23APNIC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Observed only
Statistics
164.161.0.0/16 allocated on 2012-08-23, not listed on 2012-08-24
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 1993-03-19) on 2012-08-23 and not listed on 2012-08-24. 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. Another change to this range was reported the day before or after (2012-08-24: Added 164.161.0.0/16), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 164.161.0.0/16 allocated on 2012-08-23, not listed on 2012-08-24source · retrieved
BeforeAPNIC delegated statistics 2012-08-23, before the change: allocated (dated 1993-03-19)source · retrieved
AfterAPNIC delegated statistics 2012-08-24, 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.