rirtracker

IPv4 range · 3 prefixes · 2,048 addresses

143.223.10.0 - 143.223.17.255

143.223.10.0/23, 143.223.12.0/22, 143.223.16.0/23

Now

ARIN statistics
Allocated (dated 2026-02-18) on 2026-10-09 (US)
Registry
ARIN
Holder
TKO Worldwide, LLC
From
ARIN's statistics for 2026-10-09 and the latest transfer record

Latest change

+ Add Intra-ARIN transfer

Reported
2026-02-18
Confidence
Confirmed
Inventory
No effect on ARIN applicant inventory

Timeline since 2026-01-01 (1)

2026-02-18 + Add Intra-ARIN transfer Confirmed
ARIN-Issued
Add 143.223.10.0-143.223.17.255
From
WME ARIN
To
TKO Worldwide, LLC ARIN
Piece of
143.223.0.0/19: the rest of the block stayed with the seller
Inventory
No effect on ARIN applicant inventory

ARIN's transfer log records a transfer from WME (ARIN) to TKO Worldwide, LLC (ARIN), recorded as 8 transfer records that together cover exactly this range, on 2026-02-18 19:26 UTC. ARIN-Issued lists it as "Add" because the registration changed hands; it is not a new allocation from ARIN.

Evidence (11) · classifier 1.0.0,
  1. ARIN-Issued ARIN-Issued report for 2026-02-18: "Add 143.223.10.0-143.223.17.255" source · retrieved
  2. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.10.0/24 source · retrieved
  3. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.11.0/24 source · retrieved
  4. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.12.0/24 source · retrieved
  5. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.13.0/24 source · retrieved
  6. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.14.0/24 source · retrieved
  7. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.15.0/24 source · retrieved
  8. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.16.0/24 source · retrieved
  9. Transfer log Transfer log: RESOURCE_TRANSFER on 2026-02-18 19:26 UTC, WME (ARIN) to TKO Worldwide, LLC (ARIN); resources moved: 143.223.17.0/24 source · retrieved
  10. Before ARIN delegated statistics 2026-02-17 (produced 2026-02-17T14:00:51+00:00), before the report: allocated (dated 1990-06-30) source · retrieved
  11. After ARIN delegated statistics 2026-02-19 (produced 2026-02-19T14:00:48+00:00), after the report: allocated (dated 2026-02-18) source · retrieved

Transfer records (9)

Date (UTC)TypeRange movedFromTo
Resource transfer143.223.10.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.11.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.12.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.13.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.14.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.15.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.16.0/24 WME ARINTKO Worldwide, LLC ARIN
Resource transfer143.223.17.0/24 WME ARINTKO Worldwide, LLC ARIN
Merger acquisition143.223.0.0/16 William Morris Agency, Inc. ARINWME 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/143.223.10.0-143.223.17.255.json