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.
2018-06-13RIPE NCC+ RegisteredApparent new issuanceStrong inference
Statistics
31.210.20.0/22 available on 2018-06-12, allocated on 2018-06-13
Inventory
Likely issued from RIPE NCC-controlled inventory
No transfer record matches. The RIPE NCC's statistics show it available on 2018-06-12 and allocated (dated 2018-06-13) on 2018-06-13. It moved from the RIPE NCC's unissued pool to an active registration dated around that day, so it appears to be newly issued by the RIPE NCC.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: 31.210.20.0/22 available on 2018-06-12, allocated on 2018-06-13source · retrieved
BeforeRIPE NCC delegated statistics 2018-06-12 (produced 2018-06-12T21:59:59+00:00), before the change: availablesource · retrieved
AfterRIPE NCC delegated statistics 2018-06-13 (produced 2018-06-13T21:59:59+00:00), after the change: allocated (dated 2018-06-13)source · retrieved
Classification history for this change (4 versions)
: Apparent new issuance, strong inference (classifier 1.4.0) current
2013-12-19RIPE NCCReleasedReleased from hold (the RIPE NCC lists it as 'available')Strong inference
Statistics
31.210.20.0/22 reserved on 2013-12-18, available on 2013-12-19
Inventory
The RIPE NCC's statistics now list it as 'available'; reissue not confirmed
The RIPE NCC's statistics show it reserved on 2013-12-18 and available on 2013-12-19. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. 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: 31.210.20.0/22 reserved on 2013-12-18, available on 2013-12-19source · retrieved
BeforeRIPE NCC delegated statistics 2013-12-18 (produced 2013-12-18T22:59:59+00:00), before the change: reservedsource · retrieved
AfterRIPE NCC delegated statistics 2013-12-19 (produced 2013-12-19T22:59:59+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
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.