IPv4 range · 512 addresses

198.72.78.0/23

Now

ARIN statistics: Allocated (dated 2014-05-13) (US), in the latest file
Registry: ARIN
Holder: Not looked up
From: ARIN's latest statistics

Latest change

− Remove Released from hold (ARIN lists it as 'available')

Reported: 2014-05-05 (ARIN)
Confidence: Strong inference
Inventory: ARIN's statistics now list it as 'available'; reissue not confirmed

Timeline (3)

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.

2014-05-05 ARIN − Remove Released from hold (ARIN lists it as 'available') Strong inference

ARIN-Issued: Remove 198.72.78.0-198.72.79.255
Inventory: ARIN's statistics now list it as 'available'; reissue not confirmed

ARIN's statistics show it reserved on 2014-05-04 and available on 2014-05-06. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2014-02-18, 76 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0, 2026-10-13 23:51 UTC

ARIN-Issued ARIN-Issued report for 2014-05-05: "Remove 198.72.78.0-198.72.79.255" source · retrieved 2026-10-12 18:38 UTC
Before ARIN delegated statistics 2014-05-04 (produced 2014-05-04T05:04:17+00:00), before the report: reserved source · retrieved 2026-10-12 20:15 UTC
After ARIN delegated statistics 2014-05-06 (produced 2014-05-06T05:04:08+00:00), after the report: available source · retrieved 2026-10-12 20:15 UTC

Classification history for this change (4 versions)

2026-10-13 03:24 UTC: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.0)
2026-10-13 08:05 UTC: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.1)
2026-10-13 14:48 UTC: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.2)
2026-10-13 23:51 UTC: Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.4.0) current

2014-02-18 ARIN Not in ARIN-Issued Removed (return, revocation or reclamation not publicly distinguishable) Strong inference

Inventory: Possible future reissue candidate after hold
Hold estimate: Estimated hold end 2014-04-19. Possible reissue candidate after this date; not confirmed available.

Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2013-11-04) on 2014-02-17 and reserved on 2014-02-19. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2014-04-19. This does not confirm availability.

Evidence (3) · classifier 1.4.0, 2026-10-13 23:58 UTC

Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 198.72.78.0/23 assigned on 2014-02-18, reserved on 2014-02-19 source · retrieved 2026-10-12 20:12 UTC
Before ARIN delegated statistics 2014-02-17 (produced 2014-02-17T06:05:36+00:00), before the report: assigned (dated 2013-11-04) source · retrieved 2026-10-12 20:12 UTC
After ARIN delegated statistics 2014-02-19 (produced 2014-02-19T06:06:06+00:00), after the report: reserved source · retrieved 2026-10-12 20:12 UTC

Classification history for this change (4 versions)

2026-10-13 04:41 UTC: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
2026-10-13 08:11 UTC: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
2026-10-13 14:55 UTC: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
2026-10-13 23:58 UTC: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current

2013-11-04 ARIN + Add Apparent new issuance Strong inference

ARIN-Issued: Add 198.72.78.0-198.72.79.255
Inventory: Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it available on 2013-11-03 and assigned (dated 2013-11-04) on 2013-11-05. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.

Evidence (3) · classifier 1.4.0, 2026-10-13 23:51 UTC

ARIN-Issued ARIN-Issued report for 2013-11-04: "Add 198.72.78.0-198.72.79.255" source · retrieved 2026-10-12 18:38 UTC
Before ARIN delegated statistics 2013-11-03 (produced 2013-11-03T05:06:37+00:00), before the report: available source · retrieved 2026-10-12 20:07 UTC
After ARIN delegated statistics 2013-11-05 (produced 2013-11-05T06:06:31+00:00), after the report: assigned (dated 2013-11-04) source · retrieved 2026-10-12 20:07 UTC

Classification history for this change (4 versions)

2026-10-13 03:22 UTC: Apparent reissuance of previously removed resource, strong inference (classifier 1.3.0)
2026-10-13 08:05 UTC: Apparent reissuance of previously removed resource, strong inference (classifier 1.3.1)
2026-10-13 14:48 UTC: Apparent new issuance, strong inference (classifier 1.3.2)
2026-10-13 23:51 UTC: Apparent new issuance, strong inference (classifier 1.4.0) current

Transfer records

No transfer log has a 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.

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