209.162.221.0/24: ARIN registration changes, transfers and evidence

Now

ARIN statistics: Allocated (dated 2026-07-28) on 2026-10-09 (US)
Registry: ARIN
Holder: Concentra Health Services, Inc.
From: ARIN's statistics for 2026-10-09 and the latest transfer record

Latest change

+ Add Intra-ARIN transfer

Reported: 2026-07-28
Confidence: Confirmed
Inventory: No effect on ARIN applicant inventory

Timeline since 2026-01-01 (1)

2026-07-28 + Add Intra-ARIN transfer Confirmed

ARIN-Issued: Add 209.162.221.0-209.162.221.255
From: Digital Fortress ARIN
To: Concentra Health Services, Inc. ARIN
Piece of: 209.162.208.0/20: the rest of the block stayed with the seller
Inventory: No effect on ARIN applicant inventory

ARIN's transfer log records a transfer from Digital Fortress (ARIN) to Concentra Health Services, Inc. (ARIN) on 2026-07-28 17:51 UTC. ARIN-Issued lists it as "Add" because the registration changed hands; it is not a new allocation from ARIN.

Evidence (4) · classifier 1.0.0, 2026-10-09 19:28 UTC

ARIN-Issued ARIN-Issued report for 2026-07-28: "Add 209.162.221.0-209.162.221.255" source · retrieved 2026-10-09 18:54 UTC
Transfer log Transfer log: RESOURCE_TRANSFER on 2026-07-28 17:51 UTC, Digital Fortress (ARIN) to Concentra Health Services, Inc. (ARIN); resources moved: 209.162.221.0/24 source · retrieved 2026-10-09 18:54 UTC
Before ARIN delegated statistics 2026-07-27 (produced 2026-07-27T09:00:20+00:00), before the report: allocated (dated 1997-11-17) source · retrieved 2026-10-09 19:05 UTC
After ARIN delegated statistics 2026-07-29 (produced 2026-07-29T13:00:20+00:00), after the report: allocated (dated 2026-07-28) source · retrieved 2026-10-09 19:05 UTC

Transfer records (2)

Date (UTC)	Type	Range moved	From	To
2026-07-28 17:51 UTC	Resource transfer	209.162.221.0/24	Digital Fortress ARIN	Concentra Health Services, Inc. ARIN
2021-07-09 16:51 UTC	Merger acquisition	209.162.208.0/20	Atmosera, Inc. ARIN	Digital Fortress ARIN

Date (UTC)

Type

Range moved

From

To

2026-07-28 17:51 UTC

Resource transfer

209.162.221.0/24

Digital Fortress ARIN

Concentra Health Services, Inc. ARIN

2021-07-09 16:51 UTC

Merger acquisition

209.162.208.0/20

Atmosera, Inc. ARIN

Digital Fortress ARIN

Every record in ARIN's transfer log that moved any part of this IPv4 range, back to 2009.

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/209.162.221.0-209.162.221.255.json