rirtracker

IPv4 range · 65,536 addresses

170.138.0.0/16

Now

ARIN statistics
Allocated (dated 1994-05-18) (US), in the latest file
Registry
ARIN
Holder
UnitedHealth Group Incorporated
From
ARIN's latest statistics and the latest transfer record

Latest change

Transfer log Merger/acquisition or reorganization

Reported
2025-05-20 (ARIN)
Confidence
Confirmed
Inventory
No effect on ARIN applicant inventory

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.

2025-05-20 ARIN Transfer log Merger/acquisition or reorganization Confirmed
Transfer log
Merger/acquisition: ActaMed Corp. (ARIN) to UnitedHealth Group Incorporated (ARIN)
From
ActaMed Corp. ARIN
To
UnitedHealth Group Incorporated ARIN
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a merger, acquisition or reorganization from ActaMed Corp. (ARIN) to UnitedHealth Group Incorporated (ARIN) on 2025-05-20 19:23 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 2025-05-20 19:23 UTC, ActaMed Corp. (ARIN) to UnitedHealth Group Incorporated (ARIN); resources moved: 170.138.0.0/16 source · retrieved
  2. Before ARIN delegated statistics 2025-05-19 (produced 2025-05-19T13:01:09+00:00), before the report: allocated (dated 1994-05-18) source · retrieved
  3. After ARIN delegated statistics 2025-05-21 (produced 2025-05-21T13:01:11+00:00), after the report: allocated (dated 1994-05-18) source · retrieved

Transfer records (1)

Date (UTC)LogTypeRange movedFromTo
ARINMerger acquisition170.138.0.0/16 ActaMed Corp. ARINUnitedHealth Group Incorporated 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/170.138.0.0-170.138.255.255.json