rirtracker

IPv4 range · 65,536 addresses

130.51.0.0/16

Now

ARIN statistics
Allocated (88 records, dated 2020-01-17 to 2025-10-06) (CA, US), in the latest file
Registry
ARIN
Holder
Not looked up
From
ARIN's latest statistics

Latest change

− Remove Unresolved change

Reported
2011-10-05 (ARIN)
Confidence
Observed only
Inventory
Inventory effect unknown

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.

2011-10-05 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 130.51.0.0-130.51.255.255
Inventory
Inventory effect unknown

ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2011-10-04 and not issued on 2011-10-06. (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 2011-10-05: "Remove 130.51.0.0-130.51.255.255" source · retrieved
  2. Before ARIN delegated statistics 2011-10-04, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2011-10-06, 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
2011-04-05 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 2011-06-04. 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 1988-05-24) on 2011-04-04 and not issued on 2011-04-06. (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 2011-06-04. 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: 130.51.0.0/16 assigned on 2011-04-05, not listed on 2011-04-06 source · retrieved
  2. Before ARIN delegated statistics 2011-04-04, before the report: assigned (dated 1988-05-24) source · retrieved
  3. After ARIN delegated statistics 2011-04-06, 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
2026-03-31ARIN130.51.172.0/22Transfer logMerger/acquisition
2026-01-09ARIN130.51.164.0/22Transfer logMerger/acquisition
2025-12-23ARIN130.51.94.0/24Transfer logMerger/acquisition
2025-12-18ARIN130.51.200.0/23Transfer logMerger/acquisition
2025-10-06ARIN130.51.34.0/23+ AddApparent reissuance
2025-10-06ARIN130.51.34.0/23− RemoveARIN pool record
2025-04-03ARIN130.51.198.0/23+ AddIntra-ARIN transfer
2024-10-23ARIN130.51.248.0/22Transfer logMerger/acquisition
2024-06-28ARIN130.51.96.0/22+ AddApparent reissuance
2024-06-28ARIN130.51.96.0/22− RemoveARIN pool record
2024-06-05ARIN130.51.109.0/24+ AddApparent reissuance
2024-06-05ARIN130.51.109.0/24− RemoveARIN pool record
2024-05-30ARIN130.51.84.0/22Transfer logMerger/acquisition
2024-04-26ARIN130.51.120.0/24+ AddApparent reissuance
2024-04-26ARIN130.51.120.0/24− RemoveARIN pool record
2024-04-12ARIN130.51.126.0/24+ AddApparent reissuance
2024-04-12ARIN130.51.126.0/24− RemoveARIN pool record
2024-04-09ARIN130.51.78.0/24+ AddApparent reissuance
2024-04-09ARIN130.51.78.0/24− RemoveARIN pool record
2024-04-04ARIN130.51.64.0/22+ AddApparent reissuance
2024-04-04ARIN130.51.64.0/20− RemoveARIN pool record
2024-04-04ARIN130.51.68.0/22+ AddApparent reissuance
2024-04-04ARIN130.51.72.0/22+ AddApparent reissuance
2024-04-04ARIN130.51.76.0/24+ AddApparent reissuance
2024-04-04ARIN130.51.77.0/24+ AddApparent reissuance
2024-04-04ARIN130.51.79.0/24+ AddApparent reissuance
2024-04-04ARIN130.51.88.0/22+ AddApparent reissuance
2024-04-04ARIN130.51.92.0/24+ AddApparent reissuance
2024-04-04ARIN130.51.93.0/24+ AddApparent reissuance
2024-04-04ARIN130.51.94.0/24+ AddApparent reissuance
2024-04-04ARIN130.51.95.0/24+ AddApparent reissuance
2024-04-03ARIN130.51.56.0/22+ AddApparent reissuance
2024-04-03ARIN130.51.60.0/22+ AddApparent reissuance
2024-04-03ARIN130.51.80.0/22+ AddApparent reissuance
2024-04-03ARIN130.51.80.0/22− RemoveARIN pool record
2024-04-03ARIN130.51.127.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.48.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.48.0/20− RemoveARIN pool record
2024-04-02ARIN130.51.52.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.80.0/20− RemoveARIN pool record
2024-04-02ARIN130.51.84.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.96.0/20− RemoveARIN pool record
2024-04-02ARIN130.51.100.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.104.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.108.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.110.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.111.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.112.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.112.0/20− RemoveARIN pool record
2024-04-02ARIN130.51.116.0/22+ AddApparent reissuance
2024-04-02ARIN130.51.121.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.122.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.123.0/24+ AddApparent reissuance
2024-04-02ARIN130.51.124.0/23+ AddApparent reissuance
2022-06-06ARIN130.51.196.0/22Not in ARIN-IssuedRemoved
2022-05-13ARIN130.51.8.0/22Transfer logMerger/acquisition
2022-01-25ARIN130.51.212.0/22Transfer logMerger/acquisition
2021-03-23ARIN130.51.44.0/22+ AddApparent reissuance
2021-03-18ARIN130.51.40.0/22+ AddApparent reissuance
2021-03-18ARIN130.51.40.0/21− RemoveARIN pool record

Transfer records (9)

Date (UTC)LogTypeRange movedFromTo
ARINMerger acquisition130.51.172.0/22 The Computer Works of Arkansas, Inc. ARINCG COMPUTER WORKS LLC ARIN
ARINMerger acquisition130.51.164.0/22 Wifinity, LLC ARINNet Vision Communications, LLC ARIN
ARINMerger acquisition130.51.94.0/24 Planet X Hosting LLC ARINQuickMeg Inc ARIN
ARINMerger acquisition130.51.200.0/23 HIGH SPEED UTAH LLC ARINWasatch Broadband ARIN
ARINResource transfer130.51.198.0/23 Mobile Technology Ventures Inc ARINCore Transit LLC ARIN
ARINMerger acquisition130.51.248.0/22 Element Wireless ARINWisper ISP, LLC ARIN
ARINMerger acquisition130.51.84.0/22 QUANTUM DATA CENTERS ARINQuantum Services Group, LLC. ARIN
ARINMerger acquisition130.51.8.0/22 247RACK.com ARIN247RACK.com ARIN
ARINMerger acquisition130.51.212.0/22 Vergennes Broadband LLC ARINPoint Broadband Fiber Holding, 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.

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