This data was last updated ago, at 2026-10-09 21:19 UTC. The site normally updates once a day, so the latest update didn't finish; recent changes may be missing.
IPv4 range · 256 addresses
204.153.143.0/24
Now
ARIN statistics
Allocated (dated 2026-01-14) on 2026-10-09 (US)
Registry
ARIN
Holder
Not looked up
From
ARIN's statistics for 2026-10-09
Latest change
+ AddApparent reissuance of previously removed resource
2026-01-14+ AddApparent reissuance of previously removed resourceObserved only
ARIN-Issued
Add 204.153.143.0-204.153.143.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it reserved on 2026-01-13 and allocated (dated 2026-01-14) on 2026-01-15. The tracker saw this range released from hold on 2026-01-13 (204.153.143.0-204.153.143.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2026-01-13: Remove 204.153.143.0-204.153.143.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.0.0,
ARIN-IssuedARIN-Issued report for 2026-01-14: "Add 204.153.143.0-204.153.143.255"source · retrieved
BeforeARIN delegated statistics 2026-01-13 (produced 2026-01-13T14:00:48+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2026-01-15 (produced 2026-01-15T14:00:48+00:00), after the report: allocated (dated 2026-01-14)source · retrieved
2026-01-14− RemoveChange to ARIN's own pool recordObserved only
ARIN-Issued
Remove 204.153.143.0-204.153.143.255
Inventory
Part of the issuance reported the same day
ARIN's statistics show it reserved on 2026-01-13 and allocated (dated 2026-01-14) on 2026-01-15. ARIN removed its own pool record for this range as part of issuing it: the same report adds 204.153.143.0-204.153.143.255. The issuance is explained on that line. Another change to this range was reported the day before or after (2026-01-13: Remove 204.153.143.0-204.153.143.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.0.0,
ARIN-IssuedARIN-Issued report for 2026-01-14: "Remove 204.153.143.0-204.153.143.255"source · retrieved
BeforeARIN delegated statistics 2026-01-13 (produced 2026-01-13T14:00:48+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2026-01-15 (produced 2026-01-15T14:00:48+00:00), after the report: allocated (dated 2026-01-14)source · retrieved
2026-01-13− RemoveNo substantive resource change foundObserved only
ARIN-Issued
Remove 204.153.143.0-204.153.143.255
Inventory
No effect on ARIN applicant inventory
ARIN-Issued lists it as "Remove", but ARIN's statistics show the same record before and after (reserved). Another change to this range was reported the day before or after (2026-01-14: Remove 204.153.143.0-204.153.143.255; 2026-01-14: Add 204.153.143.0-204.153.143.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.0.0,
ARIN-IssuedARIN-Issued report for 2026-01-13: "Remove 204.153.143.0-204.153.143.255"source · retrieved
BeforeARIN delegated statistics 2026-01-12 (produced 2026-01-12T14:00:47+00:00), before the report: reservedsource · retrieved
AfterARIN delegated statistics 2026-01-14 (produced 2026-01-14T14:00:47+00:00), after the report: reservedsource · retrieved
Transfer records
ARIN's transfer log has no transfer of any part of this IPv4 range.
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.