rirtracker

IPv4 range · 2 prefixes · 6,144 addresses

209.177.72.0 - 209.177.95.255

209.177.72.0/21, 209.177.80.0/20

Now

ARIN statistics
Allocated (dated 2010-04-05), allocated (dated 2017-09-08), allocated (dated 2017-09-11), allocated (dated 2022-10-04), allocated (dated 2025-07-31) (US), in the latest file
Registry
ARIN
Holder
Not looked up
From
ARIN's latest statistics

Latest change

− Remove Unresolved change

Reported
2010-03-31 (ARIN)
Confidence
Observed only
Inventory
Inventory effect unknown

Timeline (1)

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.

2010-03-31 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 209.177.72.0-209.177.95.255
Inventory
Inventory effect unknown

ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2010-03-30 and not issued on 2010-04-01. (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 2010-03-31: "Remove 209.177.72.0-209.177.95.255" source · retrieved
  2. Before ARIN delegated statistics 2010-03-30, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-04-01, 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
2025-07-31ARIN209.177.76.0/24+ AddIntra-ARIN transfer
2022-10-04ARIN209.177.79.0/24+ AddApparent reissuance
2022-10-04ARIN209.177.79.0/24− RemoveARIN pool record
2022-10-03ARIN209.177.79.0/24− RemoveNo material change
2021-11-08ARIN209.177.79.0/24Not in ARIN-IssuedRemoved
2018-01-12ARIN209.177.80.0/20Transfer logMerger/acquisition
2017-09-12ARIN209.177.79.0/24+ AddApparent new issuance
2017-09-12ARIN209.177.79.0/24− RemoveARIN pool record
2017-09-11ARIN209.177.73.0/24+ AddApparent new issuance
2017-09-11ARIN209.177.73.0/24− RemoveARIN pool record
2017-09-11ARIN209.177.76.0/24+ AddApparent new issuance
2017-09-11ARIN209.177.76.0/24− RemoveARIN pool record
2017-09-11ARIN209.177.78.0/24+ AddApparent new issuance
2017-09-11ARIN209.177.78.0/24− RemoveARIN pool record
2017-09-08ARIN209.177.72.0/24+ AddApparent new issuance
2017-09-08ARIN209.177.74.0/23+ AddApparent new issuance
2017-09-08ARIN209.177.77.0/24+ AddApparent new issuance
2010-04-05ARIN209.177.80.0/20+ AddApparent new issuance

Transfer records (2)

Date (UTC)LogTypeRange movedFromTo
ARINResource transfer209.177.76.0/24 NetOne, Inc ARINGuardian Alarm Co of Michigan Inc. ARIN
ARINMerger acquisition209.177.80.0/20 Zenlayer Inc ARINZenlayer 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/209.177.72.0-209.177.95.255.json