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.
2026-01-15ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Hammerhead Resources Inc. (ARIN) to Whitecap Resources Inc. (ARIN)
From
Hammerhead Resources Inc. ARIN
To
Whitecap Resources Inc. ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from Hammerhead Resources Inc. (ARIN) to Whitecap Resources Inc. (ARIN) on 2026-01-15 19:41 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 2026-01-15 19:41 UTC, Hammerhead Resources Inc. (ARIN) to Whitecap Resources Inc. (ARIN); resources moved: 150.107.124.0/24source · retrieved
BeforeARIN delegated statistics 2026-01-14 (produced 2026-01-14T14:00:47+00:00), before the report: allocated (dated 2023-02-07)source · retrieved
AfterARIN delegated statistics 2026-01-16 (produced 2026-01-16T14:00:49+00:00), after the report: allocated (dated 2023-02-07)source · retrieved
2023-02-08APNICTransfer logInter-RIR transfer out of APNICConfirmed
Transfer log
Transfer: Divinetworks Ltd. (APNIC) to HR-233 (ARIN)
Transferred out of APNIC administration; not offered to APNIC applicants
APNIC's transfer log records a transfer from Divinetworks Ltd. (APNIC) to HR-233 (ARIN) on 2023-02-07 22:19 UTC: it left APNIC for ARIN. It is not a new allocation and is not offered to APNIC applicants.
Evidence (3) · classifier 1.4.0,
Transfer logTransfer log: RESOURCE_TRANSFER on 2023-02-07 22:19 UTC, Divinetworks Ltd. (APNIC) to HR-233 (ARIN); resources moved: 150.107.124.0/24source · retrieved
BeforeAPNIC delegated statistics 2023-02-08, before the change: allocated (dated 2014-06-20)source · retrieved
AfterAPNIC delegated statistics 2023-02-09, after the change: not listedsource · retrieved
Classification history for this change (4 versions)
: Inter-RIR transfer out of APNIC, confirmed (classifier 1.3.0)
: Inter-RIR transfer out of APNIC, confirmed (classifier 1.3.1)
: Inter-RIR transfer out of APNIC, confirmed (classifier 1.3.2)
: Inter-RIR transfer out of APNIC, confirmed (classifier 1.4.0) current
2023-02-07ARIN+ AddInter-RIR transfer into ARINConfirmed
ARIN-Issued
Add 150.107.124.0-150.107.124.255
From
Divinetworks Ltd. APNIC
To
Hammerhead Resources Inc. ARIN
Same transfer
Also a change at APNIC, the sending registry: APNIC, 2023-02-08. Lists that cover every registry show it there.
Inventory
Transferred into ARIN administration; not a new issuance
ARIN's transfer log records a transfer from Divinetworks Ltd. (APNIC) to Hammerhead Resources Inc. (ARIN) on 2023-02-07 14:12 UTC: it came to ARIN from APNIC. It was already issued by another registry, so this is not a new issuance.
Evidence (4) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2023-02-07: "Add 150.107.124.0-150.107.124.255"source · retrieved
Transfer logTransfer log: RESOURCE_TRANSFER on 2023-02-07 14:12 UTC, Divinetworks Ltd. (APNIC) to Hammerhead Resources Inc. (ARIN); resources moved: 150.107.124.0/24source · retrieved
BeforeARIN delegated statistics 2023-02-06 (produced 2023-02-06T14:00:10+00:00), before the report: not listedsource · retrieved
AfterARIN delegated statistics 2023-02-08 (produced 2023-02-08T14:00:11+00:00), after the report: allocated (dated 2023-02-07)source · retrieved
Classification history for this change (4 versions)
: Inter-RIR transfer into ARIN, confirmed (classifier 1.3.0)
: Inter-RIR transfer into ARIN, confirmed (classifier 1.3.1)
: Inter-RIR transfer into ARIN, confirmed (classifier 1.3.2)
: Inter-RIR transfer into ARIN, confirmed (classifier 1.4.0) current
2021-08-30APNIC+ RegisteredRestored to the same holderStrong inference
Statistics
150.107.124.0/24 reserved on 2021-08-30, allocated on 2021-08-31
Inventory
No effect on APNIC applicant inventory
No transfer record matches. APNIC's statistics show it reserved on 2021-08-30 and allocated (dated 2014-06-20) on 2021-08-31. The tracker saw it removed from registration on 2021-08-10 (20 days earlier), and it is back with the same holder record it had before, so it went back to its previous holder rather than to a new one: most likely a suspension lifted, a reinstatement or a correction.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 150.107.124.0/24 reserved on 2021-08-30, allocated on 2021-08-31source · retrieved
BeforeAPNIC delegated statistics 2021-08-30, before the change: reservedsource · retrieved
AfterAPNIC delegated statistics 2021-08-31, after the change: allocated (dated 2014-06-20)source · retrieved
Classification history for this change (4 versions)
: Restored to the same holder, strong inference (classifier 1.3.0)
: Restored to the same holder, strong inference (classifier 1.3.1)
: Restored to the same holder, strong inference (classifier 1.3.2)
: Restored to the same holder, strong inference (classifier 1.4.0) current
2021-08-10APNIC− DeregisteredRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Statistics
150.107.124.0/24 allocated on 2021-08-10, reserved on 2021-08-11
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2022-08-10. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2014-06-20) on 2021-08-10 and reserved on 2021-08-11. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned IPv4 space a year after the removal or later since 2014, so the tracker estimates the hold ends on 2022-08-10. That is what APNIC has done, not a rule it states. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsFound by comparing APNIC's daily statistics: 150.107.124.0/24 allocated on 2021-08-10, reserved on 2021-08-11source · retrieved
BeforeAPNIC delegated statistics 2021-08-10, before the change: allocated (dated 2014-06-20)source · retrieved
AfterAPNIC delegated statistics 2021-08-11, 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
Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv4 range (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.