rirtracker

IPv4 range · 4,096 addresses

64.37.32.0/20

Now

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

Latest change

Not in ARIN-Issued Removed (return, revocation or reclamation not publicly distinguishable)

Reported
2025-05-12 (ARIN)
Confidence
Strong inference
Inventory
Possible future reissue candidate after hold

Hold

Removed
2025-05-12 (ARIN)
Estimated hold end
2025-07-11 (from ARIN's published rule)
Now
Possible reissue candidate; not confirmed available.

Timeline (2)

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.

2025-05-12 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 2025-07-11. 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 2010-12-07) on 2025-05-11 and reserved on 2025-05-13. 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 2025-07-11. 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: 64.37.32.0/20 allocated on 2025-05-12, reserved on 2025-05-13 source · retrieved
  2. Before ARIN delegated statistics 2025-05-11 (produced 2025-05-11T13:01:11+00:00), before the report: allocated (dated 2010-12-07) source · retrieved
  3. After ARIN delegated statistics 2025-05-13 (produced 2025-05-13T13:01:09+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
2010-12-07 ARIN + Add Apparent reissuance of previously removed resource Strong inference
ARIN-Issued
Add 64.37.32.0-64.37.47.255
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it not issued on 2010-12-06 and assigned (dated 2010-12-07) on 2010-12-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (64.37.0.0-64.37.63.255), so it appears to have been issued again from ARIN's pool.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2010-12-07: "Add 64.37.32.0-64.37.47.255" source · retrieved
  2. Before ARIN delegated statistics 2010-12-06, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-12-08, after the report: assigned (dated 2010-12-07) source · retrieved
Classification history for this change (4 versions)
  1. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.0)
  2. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.1)
  3. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.2)
  4. : Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2010-12-02ARIN64.37.0.0/18− RemoveUnresolved
2010-01-28ARIN64.37.0.0/18Not in ARIN-IssuedRemoved

Transfer records

No transfer log has a transfer of any part of this IPv4 range.

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/64.37.32.0-64.37.47.255.json