LACNIC's statistics now list it as 'available'; reissue not confirmed
Timeline (3)
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.
2014-04-23LACNICReleasedReleased from hold (LACNIC lists it as 'available')Strong inference
Statistics
170.231.0.0/16 reserved on 2014-04-22, available on 2014-04-23
Inventory
LACNIC's statistics now list it as 'available'; reissue not confirmed
LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. LACNIC moved it from its reserved (held) records to the status it calls 'available'. That is LACNIC's own label: whether and when it is reissued is not confirmed.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing LACNIC's daily statistics: 170.231.0.0/16 reserved on 2014-04-22, available on 2014-04-23source · retrieved
BeforeLACNIC delegated statistics 2014-04-22, before the change: reservedsource · retrieved
AfterLACNIC delegated statistics 2014-04-23, after the change: availablesource · retrieved
Classification history for this change (4 versions)
: Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.0)
: Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.1)
: Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.2)
: Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.4.0) current
2010-12-02ARIN− RemoveUnresolved changeObserved only
ARIN-Issued
Remove 170.231.0.0-170.231.255.255
Inventory
Inventory effect unknown
ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2010-12-02: "Remove 170.231.0.0-170.231.255.255"source · retrieved
BeforeARIN delegated statistics 2010-12-01, before the report: not issuedsource · retrieved
AfterARIN delegated statistics 2010-12-03, after the report: not issuedsource · 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
2009-12-09ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2010-02-07. 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 1996-04-17) on 2009-12-08 and not issued on 2009-12-10. (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 2010-02-07. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 170.231.0.0/16 assigned on 2009-12-09, not listed on 2009-12-10source · retrieved
BeforeARIN delegated statistics 2009-12-08, before the report: assigned (dated 1996-04-17)source · retrieved
AfterARIN delegated statistics 2009-12-10, 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.