ARIN's statistics now list it as 'available'; reissue not confirmed
Timeline (2)
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.
2013-04-29ARIN− RemoveReleased from hold (ARIN lists it as 'available')Strong inference
ARIN-Issued
Remove 137.175.0.0-137.175.255.255
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed
ARIN's statistics show it reserved on 2013-04-28 and available on 2013-04-30. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2013-01-25, 94 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2013-04-29: "Remove 137.175.0.0-137.175.255.255"source · retrieved
BeforeARIN delegated statistics 2013-04-28 (produced 2013-04-28T05:05:02+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2013-04-30 (produced 2013-04-30T05:05:01+00:00), after the report: availablesource · retrieved
Classification history for this change (4 versions)
: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.0)
: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.1)
: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.2)
: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.4.0) current
2013-01-25ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2013-03-26. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 1989-12-13) on 2013-01-24 and not issued on 2013-01-26. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2013-03-26. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 137.175.0.0/16 assigned on 2013-01-25, not listed on 2013-01-26source · retrieved
BeforeARIN delegated statistics 2013-01-24, before the report: assigned (dated 1989-12-13)source · retrieved
AfterARIN delegated statistics 2013-01-26, after the report: not issuedsource · 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
Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv4 range (ARIN's from 2009, the RIPE NCC's from 2012, APNIC's from 2010, LACNIC's from 2016, AFRINIC's from 2018). A transfer between two registries is in both logs.
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.