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: 199.26.72.0/21source · retrieved
BeforeARIN delegated statistics 2026-05-31 (produced 2026-05-31T13:00:19+00:00), before the report: allocated (dated 2013-10-08)source · retrieved
AfterARIN delegated statistics 2026-06-02 (produced 2026-06-02T13:00:19+00:00), after the report: allocated (dated 2013-10-08)source · retrieved
2024-03-04ARINTransfer logMerger/acquisition or reorganizationConfirmed
Transfer log
Merger/acquisition: Fibernet Direct (ARIN) to Crown Castle Fiber LLC (ARIN)
From
Fibernet Direct 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 Fibernet Direct (ARIN) to Crown Castle Fiber LLC (ARIN) on 2024-03-04 17:17 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 2024-03-04 17:17 UTC, Fibernet Direct (ARIN) to Crown Castle Fiber LLC (ARIN); resources moved: 199.26.72.0/21source · retrieved
BeforeARIN delegated statistics 2024-03-03 (produced 2024-03-03T14:00:45+00:00), before the report: allocated (dated 2013-10-08)source · retrieved
AfterARIN delegated statistics 2024-03-05 (produced 2024-03-05T14:00:45+00:00), after the report: allocated (dated 2013-10-08)source · retrieved
2013-10-08ARIN+ AddApparent reissuance of previously removed resourceObserved only
ARIN-Issued
Add 199.26.72.0-199.26.79.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it reserved on 2013-10-07 and allocated (dated 2013-10-08) on 2013-10-09. The tracker saw this range released from hold on 2013-10-07 (199.26.72.0-199.26.79.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2013-10-07: Remove 199.26.72.0-199.26.79.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2013-10-08: "Add 199.26.72.0-199.26.79.255"source · retrieved
BeforeARIN delegated statistics 2013-10-07 (produced 2013-10-07T05:08:34+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2013-10-09 (produced 2013-10-09T05:04:02+00:00), after the report: allocated (dated 2013-10-08)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, observed only (classifier 1.3.0)
: Apparent reissuance of previously removed resource, observed only (classifier 1.3.1)
: Apparent reissuance of previously removed resource, observed only (classifier 1.3.2)
: Apparent reissuance of previously removed resource, observed only (classifier 1.4.0) current
2013-10-07ARIN− RemoveReleased from hold (ARIN lists it as 'available')Observed only
ARIN-Issued
Remove 199.26.72.0-199.26.79.255
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed
ARIN's statistics show it reserved on 2013-10-06 and available on 2013-10-08. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2013-07-08, 91 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2013-10-08: Add 199.26.72.0-199.26.79.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2013-10-07: "Remove 199.26.72.0-199.26.79.255"source · retrieved
BeforeARIN delegated statistics 2013-10-06 (produced 2013-10-06T05:08:13+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2013-10-08 (produced 2013-10-08T05:03:56+00:00), after the report: availablesource · retrieved
Classification history for this change (4 versions)
: Released from hold (ARIN lists it as 'available'), observed only (classifier 1.3.0)
: Released from hold (ARIN lists it as 'available'), observed only (classifier 1.3.1)
: Released from hold (ARIN lists it as 'available'), observed only (classifier 1.3.2)
: Released from hold (ARIN lists it as 'available'), observed only (classifier 1.4.0) current
2013-07-08ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2013-09-06. Possible reissue candidate after this date; not confirmed available.
Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2008-10-21) on 2013-07-07 and reserved on 2013-07-09. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2013-09-06. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 199.26.72.0/21 allocated on 2013-07-08, reserved on 2013-07-09source · retrieved
BeforeARIN delegated statistics 2013-07-07 (produced 2013-07-07T05:06:34+00:00), before the report: allocated (dated 2008-10-21)source · retrieved
AfterARIN delegated statistics 2013-07-09 (produced 2013-07-09T05:06:23+00:00), after the report: 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
Transfer records (2)
Date (UTC)
Log
Type
Range moved
From
To
ARIN
Merger acquisition
199.26.72.0/21
Crown Castle Fiber LLC ARIN
Zayo Bandwidth ARIN
ARIN
Merger acquisition
199.26.72.0/21
Fibernet Direct ARIN
Crown Castle Fiber LLC 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.