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.
2021-12-23RIPE NCC+ RegisteredUnresolved changeObserved only
Statistics
AS51140 reserved on 2021-12-22, allocated on 2021-12-23
Inventory
Inventory effect unknown
No transfer record matches. The RIPE NCC's statistics show it reserved on 2021-12-22 and allocated (dated 2015-10-19) on 2021-12-23. 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: AS51140 reserved on 2021-12-22, allocated on 2021-12-23source · retrieved
BeforeRIPE NCC delegated statistics 2021-12-22 (produced 2021-12-22T22:59:00+00:00), before the change: reservedsource · retrieved
AfterRIPE NCC delegated statistics 2021-12-23 (produced 2021-12-23T22:59:00+00:00), after the change: allocated (dated 2015-10-19)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
2021-07-28RIPE NCC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Statistics
AS51140 allocated on 2021-07-27, reserved on 2021-07-28
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2022-01-24. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it allocated (dated 2015-10-19) on 2021-07-27 and reserved on 2021-07-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed ASNs for 180 days (six months), or longer while still routed, before reissuing them, so the estimated hold end is 2022-01-24. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: AS51140 allocated on 2021-07-27, reserved on 2021-07-28source · retrieved
BeforeRIPE NCC delegated statistics 2021-07-27 (produced 2021-07-27T21:59:00+00:00), before the change: allocated (dated 2015-10-19)source · retrieved
AfterRIPE NCC delegated statistics 2021-07-28 (produced 2021-07-28T21:59:00+00:00), after the change: reservedsource · 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
2015-10-19RIPE NCC+ RegisteredApparent reissuance of previously removed resourceStrong inference
Statistics
AS51140 reserved on 2015-10-18, allocated on 2015-10-19
Inventory
Likely issued from RIPE NCC-controlled inventory
No transfer record matches. The RIPE NCC's statistics show it reserved on 2015-10-18 and allocated (dated 2015-10-19) on 2015-10-19. The tracker saw this range removed from registration on 2015-04-20 (AS51140), so it appears to have been issued again from the RIPE NCC's pool.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: AS51140 reserved on 2015-10-18, allocated on 2015-10-19source · retrieved
BeforeRIPE NCC delegated statistics 2015-10-18 (produced 2015-10-18T21:59:59+00:00), before the change: reservedsource · retrieved
AfterRIPE NCC delegated statistics 2015-10-19 (produced 2015-10-19T21:59:59+00:00), after the change: allocated (dated 2015-10-19)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2015-04-20RIPE NCC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Statistics
AS51140 allocated on 2015-04-19, reserved on 2015-04-20
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2015-10-17. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it allocated (dated 2010-06-08) on 2015-04-19 and reserved on 2015-04-20. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed ASNs for 180 days (six months), or longer while still routed, before reissuing them, so the estimated hold end is 2015-10-17. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing the RIPE NCC's daily statistics: AS51140 allocated on 2015-04-19, reserved on 2015-04-20source · retrieved
BeforeRIPE NCC delegated statistics 2015-04-19 (produced 2015-04-19T21:59:59+00:00), before the change: allocated (dated 2010-06-08)source · retrieved
AfterRIPE NCC delegated statistics 2015-04-20 (produced 2015-04-20T21:59:59+00:00), after the change: reservedsource · 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
2010-06-09RIPE NCC+ RegisteredApparent new issuanceStrong inference
Statistics
AS51140 available on 2010-06-08, allocated on 2010-06-09
Inventory
Likely issued from RIPE NCC-controlled inventory
No transfer record matches. The RIPE NCC's statistics show it available on 2010-06-08 and allocated (dated 2010-06-08) on 2010-06-09. 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: AS51140 available on 2010-06-08, allocated on 2010-06-09source · retrieved
BeforeRIPE NCC delegated statistics 2010-06-08, before the change: availablesource · retrieved
AfterRIPE NCC delegated statistics 2010-06-09, after the change: allocated (dated 2010-06-08)source · retrieved
Classification history for this change (4 versions)
: Apparent new issuance, strong inference (classifier 1.3.0)
: Apparent new issuance, strong inference (classifier 1.3.1)
: Apparent new issuance, strong inference (classifier 1.3.2)
: Apparent new issuance, 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.