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.
2018-06-08LACNIC+ RegisteredApparent new issuanceStrong inference
Statistics
192.153.12.0/24 available on 2018-06-07, assigned on 2018-06-08
Inventory
Likely issued from LACNIC-controlled inventory
No transfer record matches. LACNIC's statistics show it available on 2018-06-07 and assigned (dated 2018-06-08) on 2018-06-08. It moved from LACNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by LACNIC.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing LACNIC's daily statistics: 192.153.12.0/24 available on 2018-06-07, assigned on 2018-06-08source · retrieved
BeforeLACNIC delegated statistics 2018-06-07, before the change: availablesource · retrieved
AfterLACNIC delegated statistics 2018-06-08, after the change: assigned (dated 2018-06-08)source · retrieved
Classification history for this change (4 versions)
: Apparent new issuance, strong inference (classifier 1.3.0)
: Apparent new issuance, strong inference (classifier 1.3.1)
: Apparent new issuance, strong inference (classifier 1.3.2)
: Apparent new issuance, strong inference (classifier 1.4.0) current
2014-04-18RIPE NCCReleasedReleased from hold (the RIPE NCC lists it as 'available')Strong inference
Statistics
192.153.12.0/24 reserved on 2014-04-17, available on 2014-04-18
Inventory
The RIPE NCC's statistics now list it as 'available'; reissue not confirmed
The RIPE NCC's statistics show it reserved on 2014-04-17 and available on 2014-04-18. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2014-03-18, 31 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: 192.153.12.0/24 reserved on 2014-04-17, available on 2014-04-18source · retrieved
BeforeRIPE NCC delegated statistics 2014-04-17 (produced 2014-04-17T21:59:59+00:00), before the change: reservedsource · retrieved
AfterRIPE NCC delegated statistics 2014-04-18 (produced 2014-04-18T21:59:59+00:00), after the change: availablesource · retrieved
Classification history for this change (4 versions)
: Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.0)
: Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.1)
: Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.2)
: Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.4.0) current
2014-03-18RIPE NCC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Statistics
192.153.12.0/24 assigned on 2014-03-17, reserved on 2014-03-18
Inventory
Possible future reissue candidate after hold
Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 1992-03-31) on 2014-03-17 and reserved on 2014-03-18. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: 192.153.12.0/24 assigned on 2014-03-17, reserved on 2014-03-18source · retrieved
BeforeRIPE NCC delegated statistics 2014-03-17 (produced 2014-03-17T22:59:59+00:00), before the change: assigned (dated 1992-03-31)source · retrieved
AfterRIPE NCC delegated statistics 2014-03-18 (produced 2014-03-18T22:59:59+00:00), 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
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.