rirtracker

ASN

AS401205

Now

ARIN statistics
Reserved, in the latest file
Registry
ARIN
Holder
None: it's in the registry's own pool
From
ARIN's latest statistics

Latest change

Not in ARIN-Issued Removed (return, revocation or reclamation not publicly distinguishable)

Reported
2026-10-14 (ARIN)
Confidence
Strong inference
Inventory
Possible future reissue candidate after hold

Hold

Removed
2026-10-14 (ARIN)
Estimated hold end
2027-04-14 (from ARIN's published rule; since mid-2024 ARIN has released many of these sooner)
Released from hold
2025-05-23
Now
Possible reissue candidate; not confirmed available.

Timeline (5)

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.

2026-10-14 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 2027-04-14. 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 2025-06-05) on 2026-10-13 and reserved on 2026-10-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2027-04-14. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner.

Evidence (3) · classifier 1.4.0,
  1. Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS401205 assigned on 2026-10-14, reserved on 2026-10-15 source · retrieved
  2. Before ARIN delegated statistics 2026-10-13 (produced 2026-10-13T13:00:21+00:00), before the report: assigned (dated 2025-06-05) source · retrieved
  3. After ARIN delegated statistics 2026-10-15 (produced 2026-10-15T13:00:21+00:00), after the report: reserved source · retrieved
2025-06-05 ARIN + Add Apparent reissuance of previously removed resource Strong inference
ARIN-Issued
Add AS401205
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it available on 2025-06-04 and assigned (dated 2025-06-05) on 2025-06-06. The tracker saw this range released from hold on 2025-05-23 (AS401205), so it appears to have been issued again from ARIN's pool.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2025-06-05: "Add AS401205" source · retrieved
  2. Before ARIN delegated statistics 2025-06-04 (produced 2025-06-04T13:01:11+00:00), before the report: available source · retrieved
  3. After ARIN delegated statistics 2025-06-06 (produced 2025-06-06T13:01:11+00:00), after the report: assigned (dated 2025-06-05) source · retrieved
Classification history for this change (4 versions)
  1. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.0)
  2. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.1)
  3. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.2)
  4. : Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2025-05-23 ARIN − Remove Released from hold (ARIN lists it as 'available') Strong inference
ARIN-Issued
Remove AS401205
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed

ARIN's statistics show it reserved on 2025-05-22 and available on 2025-05-24. 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 2024-09-05, 260 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2025-05-23: "Remove AS401205" source · retrieved
  2. Before ARIN delegated statistics 2025-05-22 (produced 2025-05-22T13:01:12+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2025-05-24 (produced 2025-05-24T13:01:12+00:00), after the report: available source · retrieved
Classification history for this change (4 versions)
  1. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.0)
  2. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.1)
  3. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.3.2)
  4. : Released from hold (ARIN lists it as 'available'), strong inference (classifier 1.4.0) current
2024-09-05 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 2025-03-05. 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 2024-06-25) on 2024-09-04 and reserved on 2024-09-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2025-03-05. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner.

Evidence (3) · classifier 1.4.0,
  1. Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS401205 assigned on 2024-09-05, reserved on 2024-09-06 source · retrieved
  2. Before ARIN delegated statistics 2024-09-04 (produced 2024-09-04T13:00:52+00:00), before the report: assigned (dated 2024-06-25) source · retrieved
  3. After ARIN delegated statistics 2024-09-06 (produced 2024-09-06T13:00:53+00:00), after the report: reserved source · retrieved
Classification history for this change (4 versions)
  1. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
  2. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
  3. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
  4. : Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current
2024-06-25 ARIN + Add Apparent new issuance Strong inference
ARIN-Issued
Add AS401205
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it available on 2024-06-24 and assigned (dated 2024-06-25) on 2024-06-26. 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,
  1. ARIN-Issued ARIN-Issued report for 2024-06-25: "Add AS401205" source · retrieved
  2. Before ARIN delegated statistics 2024-06-24 (produced 2024-06-24T13:00:44+00:00), before the report: available source · retrieved
  3. After ARIN delegated statistics 2024-06-26 (produced 2024-06-26T13:00:46+00:00), after the report: assigned (dated 2024-06-25) source · retrieved
Classification history for this change (4 versions)
  1. : Apparent new issuance, strong inference (classifier 1.3.0)
  2. : Apparent new issuance, strong inference (classifier 1.3.1)
  3. : Apparent new issuance, strong inference (classifier 1.3.2)
  4. : Apparent new issuance, strong inference (classifier 1.4.0) current

Transfer records

No transfer log has a transfer of any part of this ASN.

RDAP lookups

Looked upWhyRegistryHandleOrganizationStatusLast changed
After 7 days not registered (RDAP 404)
After 24 hours not registered (RDAP 404)
First seen not registered (RDAP 404)

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: asn/401205.json