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.
2011-02-19RIPE NCC+ RegisteredUnresolved changeObserved only
Statistics
193.0.16.0/20 available on 2011-02-18, assigned on 2011-02-19
Inventory
Inventory effect unknown
No transfer record matches. The RIPE NCC's statistics show it available on 2011-02-18 and assigned (dated 1993-09-01) on 2011-02-19. The new registration isn't dated near that day, so the tracker can't tell whether this is a new issuance.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: 193.0.16.0/20 available on 2011-02-18, assigned on 2011-02-19source · retrieved
BeforeRIPE NCC delegated statistics 2011-02-18, before the change: availablesource · retrieved
AfterRIPE NCC delegated statistics 2011-02-19, after the change: assigned (dated 1993-09-01)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
2011-02-16RIPE NCC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Statistics
193.0.16.0/20 assigned on 2011-02-15, available on 2011-02-16
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 1993-09-01) on 2011-02-15 and available on 2011-02-16. 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: 193.0.16.0/20 assigned on 2011-02-15, available on 2011-02-16source · retrieved
BeforeRIPE NCC delegated statistics 2011-02-15, before the change: assigned (dated 1993-09-01)source · retrieved
AfterRIPE NCC delegated statistics 2011-02-16, after the change: availablesource · 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.