rirtracker

IPv4 range · 32,768 addresses

163.123.128.0/17

Now

ARIN statistics
Allocated (48 records, dated 2020-09-28 to 2025-09-30), reserved (2 records) (CA, US), in the latest file
Registry
Not known
Holder
Not looked up

Latest change

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

Reported
2018-12-27 (ARIN)
Confidence
Strong inference
Inventory
Possible future reissue candidate after hold

Hold

Removed
2018-12-27 (ARIN)
Estimated hold end
2019-02-25 (from ARIN's published rule)
Now
Possible reissue candidate; not confirmed available.

Timeline (5)

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.

2018-12-27 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 2019-02-25. 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 2017-09-18) on 2018-12-26 and reserved on 2018-12-28. 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 2019-02-25. 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: 163.123.128.0/17 allocated on 2018-12-27, reserved on 2018-12-28 source · retrieved
  2. Before ARIN delegated statistics 2018-12-26 (produced 2018-12-26T06:00:12+00:00), before the report: allocated (dated 2017-09-18) source · retrieved
  3. After ARIN delegated statistics 2018-12-28 (produced 2018-12-28T06:00:11+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
2018-02-05 ARIN Transfer log Merger/acquisition or reorganization Confirmed
Transfer log
Merger/acquisition: Virtuzo (ARIN) to OppoBox LLC (ARIN)
From
Virtuzo ARIN
To
OppoBox LLC ARIN
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a merger, acquisition or reorganization from Virtuzo (ARIN) to OppoBox LLC (ARIN) on 2018-02-05 15:37 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 2018-02-05 15:37 UTC, Virtuzo (ARIN) to OppoBox LLC (ARIN); resources moved: 163.123.128.0/17 source · retrieved
  2. Before ARIN delegated statistics 2018-02-04 (produced 2018-02-04T06:10:04+00:00), before the report: allocated (dated 2017-09-18) source · retrieved
  3. After ARIN delegated statistics 2018-02-06 (produced 2018-02-06T06:09:51+00:00), after the report: allocated (dated 2017-09-18) source · retrieved
2017-09-18 ARIN + Add Unresolved change Observed only
ARIN-Issued
Add 163.123.128.0-163.123.255.255
Inventory
Inventory effect unknown

No transfer record matches. ARIN's statistics show it not listed on 2017-09-17 and allocated (dated 2017-09-18) on 2017-09-19. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2017-09-18: "Add 163.123.128.0-163.123.255.255" source · retrieved
  2. Before ARIN delegated statistics 2017-09-17 (produced 2017-09-17T05:11:26+00:00), before the report: not listed source · retrieved
  3. After ARIN delegated statistics 2017-09-19 (produced 2017-09-19T05:11:22+00:00), after the report: allocated (dated 2017-09-18) 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
2017-09-18 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 163.123.128.0-163.123.255.255
Inventory
Inventory effect unknown

No transfer record matches. ARIN's statistics show it not listed on 2017-09-17 and allocated (dated 2017-09-18) on 2017-09-19. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2017-09-18: "Remove 163.123.128.0-163.123.255.255" source · retrieved
  2. Before ARIN delegated statistics 2017-09-17 (produced 2017-09-17T05:11:26+00:00), before the report: not listed source · retrieved
  3. After ARIN delegated statistics 2017-09-19 (produced 2017-09-19T05:11:22+00:00), after the report: allocated (dated 2017-09-18) 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
2010-08-11 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 163.123.128.0-163.123.255.255
Inventory
Inventory effect unknown

ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2010-08-10 and not issued on 2010-08-12. (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 2010-08-11: "Remove 163.123.128.0-163.123.255.255" source · retrieved
  2. Before ARIN delegated statistics 2010-08-10, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-08-12, 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

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2026-10-08RIPE NCC163.123.193.0/24Transfer logTransfer into the RIPE NCC
2026-10-08ARIN163.123.193.0/24Not in ARIN-IssuedTransfer out of ARIN
2026-10-08RIPE NCC163.123.195.0/24Transfer logTransfer into the RIPE NCC
2026-10-08ARIN163.123.195.0/24Not in ARIN-IssuedTransfer out of ARIN
2026-03-09ARIN163.123.232.0/22Not in ARIN-IssuedRemoved
2026-02-11ARIN163.123.192.0/24Transfer logTransfer out of ARIN
2026-02-11RIPE NCC163.123.192.0/24Transfer logTransfer into the RIPE NCC
2026-02-11ARIN163.123.194.0/24Transfer logTransfer out of ARIN
2026-02-11RIPE NCC163.123.194.0/24Transfer logTransfer into the RIPE NCC
2026-02-09ARIN163.123.191.0/24Not in ARIN-IssuedRemoved
2025-12-11ARIN163.123.198.0/23Transfer logMerger/acquisition
2025-09-30ARIN163.123.236.0/22+ AddApparent reissuance
2025-09-30ARIN163.123.236.0/22− RemoveARIN pool record
2025-06-18ARIN163.123.191.0/24Not in ARIN-IssuedRemoved
2025-03-26ARIN163.123.148.0/22Transfer logMerger/acquisition
2024-08-07ARIN163.123.220.0/22Transfer logMerger/acquisition
2024-02-06ARIN163.123.204.0/22Transfer logMerger/acquisition
2023-08-22ARIN163.123.164.0/22Transfer logMerger/acquisition
2023-02-06ARIN163.123.236.0/22Not in ARIN-IssuedRemoved
2022-07-22ARIN163.123.132.0/24+ AddApparent reissuance
2022-07-21ARIN163.123.132.0/24− RemoveARIN pool record
2022-05-11ARIN163.123.192.0/22Transfer logMerger/acquisition
2022-02-07ARIN163.123.132.0/24Not in ARIN-IssuedRemoved
2021-04-22ARIN163.123.192.0/22Transfer logMerger/acquisition
2020-11-19ARIN163.123.190.0/24+ AddApparent reissuance
2020-11-19ARIN163.123.190.0/24− RemoveARIN pool record
2020-10-21ARIN163.123.189.0/24+ AddApparent reissuance
2020-10-21ARIN163.123.189.0/24− RemoveARIN pool record
2020-10-14ARIN163.123.212.0/22+ AddApparent reissuance
2020-10-14ARIN163.123.212.0/22− RemoveARIN pool record
2020-10-14ARIN163.123.246.0/23+ AddApparent reissuance
2020-10-14ARIN163.123.246.0/23− RemoveARIN pool record
2020-10-12ARIN163.123.176.0/24+ AddApparent reissuance
2020-10-12ARIN163.123.176.0/24− RemoveARIN pool record
2020-10-12ARIN163.123.180.0/22+ AddApparent reissuance
2020-10-12ARIN163.123.180.0/22− RemoveARIN pool record
2020-10-08ARIN163.123.188.0/24+ AddApparent reissuance
2020-10-08ARIN163.123.188.0/24− RemoveARIN pool record
2020-10-08ARIN163.123.227.0/24+ AddApparent reissuance
2020-10-08ARIN163.123.227.0/24− RemoveARIN pool record
2020-10-07ARIN163.123.200.0/22+ AddApparent reissuance
2020-10-07ARIN163.123.200.0/22− RemoveARIN pool record
2020-10-05ARIN163.123.152.0/22+ AddApparent reissuance
2020-10-05ARIN163.123.216.0/24+ AddApparent reissuance
2020-10-05ARIN163.123.216.0/24− RemoveARIN pool record
2020-10-05ARIN163.123.232.0/22+ AddApparent reissuance
2020-10-05ARIN163.123.232.0/22− RemoveARIN pool record
2020-10-04ARIN163.123.152.0/22− RemoveNo material change
2020-10-02ARIN163.123.137.0/24+ AddApparent reissuance
2020-10-02ARIN163.123.137.0/24− RemoveARIN pool record
2020-10-02ARIN163.123.198.0/23+ AddApparent reissuance
2020-10-02ARIN163.123.198.0/23− RemoveARIN pool record
2020-10-02ARIN163.123.226.0/24+ AddApparent reissuance
2020-10-02ARIN163.123.226.0/24− RemoveARIN pool record
2020-10-01ARIN163.123.218.0/24+ AddApparent reissuance
2020-10-01ARIN163.123.218.0/24− RemoveARIN pool record
2020-09-30ARIN163.123.196.0/24+ AddApparent reissuance
2020-09-30ARIN163.123.196.0/24− RemoveARIN pool record
2020-09-30ARIN163.123.197.0/24+ AddApparent reissuance
2020-09-30ARIN163.123.197.0/24− RemoveARIN pool record

Transfer records (16)

Date (UTC)LogTypeRange movedFromTo
RIPE NCCResource transfer163.123.193.0/24 (no name given) ARINAGX Management Consultancy - FZCO RIPE NCC
RIPE NCCResource transfer163.123.195.0/24 (no name given) ARINAGX Management Consultancy - FZCO RIPE NCC
ARINResource transfer163.123.193.0/24 Path Network, Inc. ARINAGX Management Consultancy - FZCO RIPE NCC
ARINResource transfer163.123.195.0/24 Path Network, Inc. ARINAGX Management Consultancy - FZCO RIPE NCC
RIPE NCCResource transfer163.123.192.0/24 (no name given) ARINSamuel Cosgrove RIPE NCC
RIPE NCCResource transfer163.123.194.0/24 (no name given) ARINSamuel Cosgrove RIPE NCC
ARINResource transfer163.123.192.0/24 Path Network, Inc. ARINSamuel Cosgrove RIPE NCC
ARINResource transfer163.123.194.0/24 Path Network, Inc. ARINSamuel Cosgrove RIPE NCC
ARINMerger acquisition163.123.198.0/23 Cyber Safe Solutions LLC ARINCyberMaxx LLC ARIN
ARINMerger acquisition163.123.148.0/22 Celerity Networks LLC ARINGallatin Wireless Internet, LLC ARIN
ARINMerger acquisition163.123.220.0/22 Tunbroker LLC ARINNetSWAT LLC ARIN
ARINMerger acquisition163.123.204.0/22 Nexril ARINPureVoltage Hosting Inc. ARIN
ARINMerger acquisition163.123.164.0/22 Monster Broadband, Inc. ARINPoint Broadband Fiber Holding, LLC ARIN
ARINMerger acquisition163.123.192.0/22 Packet Rabbit Inc ARINPath Network, Inc. ARIN
ARINMerger acquisition163.123.192.0/22 Geekasaurus Solutions Inc ARINPacket Rabbit Inc ARIN
ARINMerger acquisition163.123.128.0/17 Virtuzo ARINOppoBox 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.

This page as data: ip/163.123.128.0-163.123.255.255.json