rirtracker

IPv4 range · 16,384 addresses

64.37.0.0/18

Now

ARIN statistics
Allocated (dated 2010-12-07), allocated (dated 2010-12-08), reserved (US), in the latest file
Registry
Not known
Holder
Not looked up

Latest change

− Remove Unresolved change

Reported
2010-12-02 (ARIN)
Confidence
Observed only
Inventory
Inventory effect unknown

Hold

Removed
2010-01-28 (ARIN)
Estimated hold end
2010-03-29 (from ARIN's published rule)

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.

2010-12-02 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 64.37.0.0-64.37.63.255
Inventory
Inventory effect unknown

ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2010-12-02: "Remove 64.37.0.0-64.37.63.255" source · retrieved
  2. Before ARIN delegated statistics 2010-12-01, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-12-03, after the report: not issued source · retrieved
Classification history for this change (4 versions)
  1. : Unresolved change, observed only (classifier 1.3.0)
  2. : Unresolved change, observed only (classifier 1.3.1)
  3. : Unresolved change, observed only (classifier 1.3.2)
  4. : Unresolved change, observed only (classifier 1.4.0) current
2010-01-28 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 2010-03-29. 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 assigned (dated 2000-02-03) on 2010-01-27 and not issued on 2010-01-29. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-03-29. 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: 64.37.0.0/18 assigned on 2010-01-28, not listed on 2010-01-29 source · retrieved
  2. Before ARIN delegated statistics 2010-01-27, before the report: assigned (dated 2000-02-03) source · retrieved
  3. After ARIN delegated statistics 2010-01-29, after the report: not issued 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

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2025-05-12ARIN64.37.32.0/20Not in ARIN-IssuedRemoved
2022-05-11ARIN64.37.0.0/20Transfer logMerger/acquisition
2020-01-09ARIN64.37.0.0/20Transfer logMerger/acquisition
2010-12-08ARIN64.37.48.0/20+ AddApparent reissuance
2010-12-07ARIN64.37.0.0/20+ AddApparent reissuance
2010-12-07ARIN64.37.16.0/20+ AddApparent reissuance
2010-12-07ARIN64.37.32.0/20+ AddApparent reissuance

Transfer records (2)

Date (UTC)LogTypeRange movedFromTo
ARINMerger acquisition64.37.0.0/20 InfoWest, Inc. ARINInfoWest ARIN
ARINMerger acquisition64.37.0.0/20 AWI Networks ARINInfoWest, Inc. 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.

This page as data: ip/64.37.0.0-64.37.63.255.json