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.
2026-06-01ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN)
From
Crown Castle Fiber LLC ARIN
To
Zayo Bandwidth ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN) on 2026-06-01 16:06 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 2026-06-01 16:06 UTC, Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN); resources moved: 160.72.0.0/16source · retrieved
BeforeARIN delegated statistics 2026-05-31 (produced 2026-05-31T13:00:19+00:00), before the report: allocated (dated 2016-04-29)source · retrieved
AfterARIN delegated statistics 2026-06-02 (produced 2026-06-02T13:00:19+00:00), after the report: allocated (dated 2016-04-29)source · retrieved
2024-02-29ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Lightower Fiber Networks I, LLC (ARIN) to Crown Castle Fiber LLC (ARIN)
From
Lightower Fiber Networks I, LLC ARIN
To
Crown Castle Fiber LLC ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from Lightower Fiber Networks I, LLC (ARIN) to Crown Castle Fiber LLC (ARIN) on 2024-02-29 20:25 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 2024-02-29 20:25 UTC, Lightower Fiber Networks I, LLC (ARIN) to Crown Castle Fiber LLC (ARIN); resources moved: 160.72.0.0/16source · retrieved
BeforeARIN delegated statistics 2024-02-28 (produced 2024-02-28T14:00:43+00:00), before the report: allocated (dated 2016-04-29)source · retrieved
AfterARIN delegated statistics 2024-03-01 (produced 2024-03-01T14:00:43+00:00), after the report: allocated (dated 2016-04-29)source · retrieved
ARIN's transfer log records a transfer from Weyerhaeuser Company (ARIN) to Lightower Fiber Networks I, LLC (ARIN) on 2016-04-29 19:45 UTC. ARIN-Issued lists it as "Add" because the registration changed hands; it is not a new allocation from ARIN.
Evidence (4) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2016-04-29: "Add 160.72.0.0-160.72.255.255"source · retrieved
Transfer logTransfer log: RESOURCE_TRANSFER on 2016-04-29 19:45 UTC, Weyerhaeuser Company (ARIN) to Lightower Fiber Networks I, LLC (ARIN); resources moved: 160.72.0.0/16source · retrieved
BeforeARIN delegated statistics 2016-04-28 (produced 2016-04-28T05:04:39+00:00), before the report: assigned (dated 1994-10-03)source · retrieved
AfterARIN delegated statistics 2016-04-30 (produced 2016-04-30T05:04:53+00:00), after the report: allocated (dated 2016-04-29)source · retrieved
Classification history for this change (4 versions)
: Intra-ARIN transfer, confirmed (classifier 1.4.0) current
2015-12-11ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: MacMillan Bloedel Limited (ARIN) to Weyerhaeuser Company (ARIN)
From
MacMillan Bloedel Limited ARIN
To
Weyerhaeuser Company ARIN
Inventory
No effect on ARIN applicant inventory
ARIN's transfer log records a merger, acquisition or reorganization from MacMillan Bloedel Limited (ARIN) to Weyerhaeuser Company (ARIN) on 2015-12-11 14:43 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 2015-12-11 14:43 UTC, MacMillan Bloedel Limited (ARIN) to Weyerhaeuser Company (ARIN); resources moved: 160.72.0.0/16source · retrieved
BeforeARIN delegated statistics 2015-12-10 (produced 2015-12-10T06:04:38+00:00), before the report: assigned (dated 1994-10-03)source · retrieved
AfterARIN delegated statistics 2015-12-12 (produced 2015-12-12T06:04:13+00:00), after the report: assigned (dated 1994-10-03)source · retrieved
Transfer records (4)
Date (UTC)
Log
Type
Range moved
From
To
ARIN
Merger acquisition
160.72.0.0/16
Crown Castle Fiber LLC ARIN
Zayo Bandwidth ARIN
ARIN
Merger acquisition
160.72.0.0/16
Lightower Fiber Networks I, LLC ARIN
Crown Castle Fiber LLC ARIN
ARIN
Resource transfer
160.72.0.0/16
Weyerhaeuser Company ARIN
Lightower Fiber Networks I, LLC ARIN
ARIN
Merger acquisition
160.72.0.0/16
MacMillan Bloedel Limited ARIN
Weyerhaeuser Company ARIN
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.