rirtracker

IPv6 range · 79,228,162,514,264,337,593,543,950,336 addresses

2001:1938::/32

Now

ARIN statistics
Available, in the latest file
Registry
ARIN
Holder
None: it's in the registry's own pool
From
ARIN's latest statistics

Latest change

− Remove Released from hold (ARIN lists it as 'available')

Reported
2025-12-30 (ARIN)
Confidence
Strong inference
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed

Hold

Removed
2024-09-06 (ARIN)
Estimated hold end
2025-03-06 (from ARIN's published rule)
Released from hold
2025-12-30
Now
Possible reissue candidate; not confirmed available.

Timeline (3)

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.

2025-12-30 ARIN − Remove Released from hold (ARIN lists it as 'available') Strong inference
ARIN-Issued
Remove 2001:1938::-2001:1938:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed

ARIN's statistics show it reserved on 2025-12-29 and available on 2025-12-31. 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 2024-09-06, 480 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2025-12-30: "Remove 2001:1938::-2001:1938:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF" source · retrieved
  2. Before ARIN delegated statistics 2025-12-29 (produced 2025-12-29T14:00:47+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2025-12-31 (produced 2025-12-31T14:00:48+00:00), after the report: available source · retrieved
Classification history for this change (4 versions)
  1. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.0)
  2. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.1)
  3. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.2)
  4. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.4.0) current
2024-09-06 ARIN Not in ARIN-Issued Removed (return, revocation or reclamation not publicly distinguishable) Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2025-03-06. 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 2004-02-23) on 2024-09-05 and reserved on 2024-09-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv6 space for 6 calendar months before reissuing it, so the estimated hold end is 2025-03-06. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 2001:1938::/32 allocated on 2024-09-06, reserved on 2024-09-07 source · retrieved
  2. Before ARIN delegated statistics 2024-09-05 (produced 2024-09-05T13:00:52+00:00), before the report: allocated (dated 2004-02-23) source · retrieved
  3. After ARIN delegated statistics 2024-09-07 (produced 2024-09-07T13:00:52+00:00), after the report: reserved source · retrieved
Classification history for this change (4 versions)
  1. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
  2. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
  3. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
  4. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current
2022-05-06 ARIN Transfer log Merger/acquisition or reorganization Confirmed
Transfer log
Merger/acquisition: Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN)
From
Highwinds Network Group, Inc. ARIN
To
StackPath, LLC. ARIN
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a merger, acquisition or reorganization from Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN) on 2022-05-06 18:01 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,
  1. Transfer log Transfer log: MERGER_ACQUISITION on 2022-05-06 18:01 UTC, Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN); resources moved: 2001:1938::/32 source · retrieved
  2. Before ARIN delegated statistics 2022-05-05 (produced 2022-05-05T13:00:10+00:00), before the report: allocated (dated 2004-02-23) source · retrieved
  3. After ARIN delegated statistics 2022-05-07 (produced 2022-05-07T13:00:10+00:00), after the report: allocated (dated 2004-02-23) source · retrieved

Transfer records (1)

Date (UTC)LogTypeRange movedFromTo
ARINMerger acquisition2001:1938::/32 Highwinds Network Group, Inc. ARINStackPath, LLC. ARIN

Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv6 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.

This page as data: ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff.json