rirtracker

IPv4 range · 1,024 addresses

143.203.12.0/22

Now

ARIN statistics
Allocated (dated 2026-10-07) on 2026-10-09 (CA)
Registry
ARIN
Holder
TFLM LPTRM-1
From
RDAP, looked up 2026-10-09 20:14 UTC

Latest change

+ Add Apparent reissuance of previously removed resource

Reported
2026-10-07
Confidence
Strong inference Provisional
Inventory
Likely issued from ARIN-controlled inventory

Timeline since 2026-01-01 (2)

2026-10-07 + Add Apparent reissuance of previously removed resource Strong inference Provisional
ARIN-Issued
Add 143.203.12.0-143.203.15.255
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it reserved on 2026-10-06 and allocated (dated 2026-10-07) on 2026-10-08. The tracker saw this range released from hold on 2026-10-02 (143.203.0.0-143.203.63.255), so it appears to have been issued again from ARIN's pool.

Evidence (3) · classifier 1.0.0,
  1. ARIN-Issued ARIN-Issued report for 2026-10-07: "Add 143.203.12.0-143.203.15.255" source · retrieved
  2. Before ARIN delegated statistics 2026-10-06 (produced 2026-10-06T13:00:21+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2026-10-08 (produced 2026-10-08T13:00:23+00:00), after the report: allocated (dated 2026-10-07) source · retrieved
2026-10-07 − Remove Change to ARIN's own pool record Strong inference Provisional
ARIN-Issued
Remove 143.203.12.0-143.203.15.255
Inventory
Part of the issuance reported the same day

ARIN's statistics show it reserved on 2026-10-06 and allocated (dated 2026-10-07) on 2026-10-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 143.203.12.0-143.203.15.255. The issuance is explained on that line.

Evidence (3) · classifier 1.0.0,
  1. ARIN-Issued ARIN-Issued report for 2026-10-07: "Remove 143.203.12.0-143.203.15.255" source · retrieved
  2. Before ARIN delegated statistics 2026-10-06 (produced 2026-10-06T13:00:21+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2026-10-08 (produced 2026-10-08T13:00:23+00:00), after the report: allocated (dated 2026-10-07) source · retrieved

Changes to overlapping ranges

DateRangeARIN actionWhat happened
2026-10-02143.203.0.0/18− RemoveARIN pool record

Transfer records

ARIN's transfer log has no transfer of any part of this IPv4 range.

RDAP lookups

Looked upWhyRegistryHandleOrganizationStatusLast changed
First seen ARINNET-143-203-12-0-1TFLM LPTRM-1active2026-10-07
First seen ARINNET-143-203-12-0-1TFLM LPTRM-1active2026-10-07

Organization-level details only; contact details are never kept. RDAP shows the registration when it was looked up, not in the past.

This page as data: ip/143.203.12.0-143.203.15.255.json