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.
2026-07-08ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Sidus Group, LLC (ARIN) to Fulcrum Services LLC (ARIN)
From
Sidus Group, LLC ARIN
To
Fulcrum Services LLC ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from Sidus Group, LLC (ARIN) to Fulcrum Services LLC (ARIN) on 2026-07-08 20:23 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.
Evidence (3) · classifier 1.4.0,
Transfer logTransfer log: MERGER_ACQUISITION on 2026-07-08 20:23 UTC, Sidus Group, LLC (ARIN) to Fulcrum Services LLC (ARIN); resources moved: AS401373source · retrieved
BeforeARIN delegated statistics 2026-07-07 (produced 2026-07-07T09:00:21+00:00), before the report: assigned (dated 2024-10-04)source · retrieved
AfterARIN delegated statistics 2026-07-09 (produced 2026-07-09T09:00:22+00:00), after the report: assigned (dated 2024-10-04)source · retrieved
2024-10-04ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add AS401373
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it available on 2024-10-03 and assigned (dated 2024-10-04) on 2024-10-05. 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 2024-10-04: "Add AS401373"source · retrieved
BeforeARIN delegated statistics 2024-10-03 (produced 2024-10-03T13:00:53+00:00), before the report: availablesource · retrieved
AfterARIN delegated statistics 2024-10-05 (produced 2024-10-05T13:00:53+00:00), after the report: assigned (dated 2024-10-04)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 (1)
Date (UTC)
Log
Type
Range moved
From
To
ARIN
Merger acquisition
AS401373
Sidus Group, LLC ARIN
Fulcrum Services LLC ARIN
Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this ASN (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.