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.
2019-01-14ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add AS397131
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it available on 2019-01-13 and assigned (dated 2019-01-14) on 2019-01-15. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2019-01-14: "Add AS397131"source · retrieved
BeforeARIN delegated statistics 2019-01-13 (produced 2019-01-13T06:00:12+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2019-01-15 (produced 2019-01-15T06:00:11+00:00), after the report: assigned (dated 2019-01-14)source · retrieved
Classification history for this change (4 versions)
: Apparent new issuance, strong inference (classifier 1.4.0) current
2019-01-11ARIN− RemoveReleased from hold (ARIN lists it as 'available')Strong inference
ARIN-Issued
Remove AS397131
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed
ARIN's statistics show it reserved on 2019-01-10 and available on 2019-01-12. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. 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 2019-01-11: "Remove AS397131"source · retrieved
BeforeARIN delegated statistics 2019-01-10 (produced 2019-01-10T06:00:12+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2019-01-12 (produced 2019-01-12T06:00:09+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
Transfer records
No transfer log has a transfer of any part of this ASN.
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.