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.
2018-01-04APNIC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Observed only
Statistics
57.147.0.0/16 allocated on 2018-01-04, reserved on 2018-01-05
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2019-01-04. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 1992-01-10) on 2018-01-04 and reserved on 2018-01-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned IPv4 space a year after the removal or later since 2014, so the tracker estimates the hold ends on 2019-01-04. That is what APNIC has done, not a rule it states. This does not confirm availability. Another change to this range was reported the day before or after (2018-01-03: Added 57.147.0.0/16), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 57.147.0.0/16 allocated on 2018-01-04, reserved on 2018-01-05source · retrieved
BeforeAPNIC delegated statistics 2018-01-04, before the change: allocated (dated 1992-01-10)source · retrieved
AfterAPNIC delegated statistics 2018-01-05, after the change: reservedsource · 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
2018-01-03APNIC+ RegisteredUnresolved changeObserved only
Statistics
57.147.0.0/16 not listed on 2018-01-03, allocated on 2018-01-04
Inventory
Inventory effect unknown
No transfer record matches. APNIC's statistics show it not listed on 2018-01-03 and allocated (dated 1992-01-10) on 2018-01-04. 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: 57.147.0.0/16 not listed on 2018-01-03, allocated on 2018-01-04source · retrieved
BeforeAPNIC delegated statistics 2018-01-03, before the change: not listedsource · retrieved
AfterAPNIC delegated statistics 2018-01-04, after the change: allocated (dated 1992-01-10)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.