rirtracker

IPv4 range · 4,096 addresses

173.255.144.0/20

Now

ARIN statistics
Allocated (dated 2010-02-01) (only part of the range) (CA), in the latest file
Registry
Not known
Holder
Not looked up

Latest change

Transfer log Merger/acquisition or reorganization

Reported
2017-12-08 (ARIN)
Confidence
Confirmed
Inventory
No effect on ARIN applicant inventory

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.

2017-12-08 ARIN Transfer log Merger/acquisition or reorganization Confirmed
Transfer log
Merger/acquisition: Pacific Online Inc. (ARIN) to Calligo (Canada) Inc. (ARIN)
From
Pacific Online Inc. ARIN
To
Calligo (Canada) Inc. ARIN
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a merger, acquisition or reorganization from Pacific Online Inc. (ARIN) to Calligo (Canada) Inc. (ARIN) on 2017-12-08 16:23 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 2017-12-08 16:23 UTC, Pacific Online Inc. (ARIN) to Calligo (Canada) Inc. (ARIN); resources moved: 173.255.144.0/20 source · retrieved
  2. Before ARIN delegated statistics 2017-12-07 (produced 2017-12-07T06:10:14+00:00), before the report: allocated (dated 2010-02-01) source · retrieved
  3. After ARIN delegated statistics 2017-12-09 (produced 2017-12-09T06:09:38+00:00), after the report: allocated (dated 2010-02-01) source · retrieved
2010-02-01 ARIN + Add Apparent new issuance Strong inference
ARIN-Issued
Add 173.255.144.0-173.255.159.255
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it not issued on 2010-01-31 and allocated (dated 2010-02-01) on 2010-02-02. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2010-02-01: "Add 173.255.144.0-173.255.159.255" source · retrieved
  2. Before ARIN delegated statistics 2010-01-31, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-02-02, after the report: allocated (dated 2010-02-01) source · retrieved
Classification history for this change (4 versions)
  1. : Apparent new issuance, strong inference (classifier 1.3.0)
  2. : Apparent new issuance, strong inference (classifier 1.3.1)
  3. : Apparent new issuance, strong inference (classifier 1.3.2)
  4. : Apparent new issuance, strong inference (classifier 1.4.0) current

Sold in pieces

3 pieces of this block transferred since 2010-04-23, 50% of it so far.

DatePieceWhat happenedFromTo
2018-04-23 173.255.144.0/21Transfer out of ARIN Calligo (Canada) Inc. ARINCalligo Limited RIPE NCC
2026-04-07 173.255.148.0/24Intra-RIPE NCC transfer Calligo Limited RIPE NCCRCARRE S.A. RIPE NCC
2026-04-07 173.255.150.0/24Intra-RIPE NCC transfer Calligo Limited RIPE NCCRCARRE S.A. RIPE NCC

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2026-04-07RIPE NCC173.255.148.0/24Transfer logIntra-RIPE NCC transfer
2026-04-07RIPE NCC173.255.150.0/24Transfer logIntra-RIPE NCC transfer
2018-04-23ARIN173.255.144.0/21Transfer logTransfer out of ARIN
2018-04-23RIPE NCC173.255.144.0/21Transfer logTransfer into the RIPE NCC

Transfer records (4)

Date (UTC)LogTypeRange movedFromTo
RIPE NCCResource transfer173.255.148.0/24 Calligo Limited RIPE NCCRCARRE S.A. RIPE NCC
RIPE NCCResource transfer173.255.144.0/21 (no name given) ARINCalligo Limited RIPE NCC
ARINResource transfer173.255.144.0/21 Calligo (Canada) Inc. ARINCalligo Limited RIPE NCC
ARINMerger acquisition173.255.144.0/20 Pacific Online Inc. ARINCalligo (Canada) 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/173.255.144.0-173.255.159.255.json