rirtracker

ASN

AS21987

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

− Remove No substantive resource change found

Reported
2026-10-13 (ARIN)
Confidence
Strong inference
Inventory
No effect on ARIN applicant inventory

Hold

Removed
2025-12-08 (ARIN)
Estimated hold end
2026-06-08 (from ARIN's published rule; since mid-2024 ARIN has released many of these sooner)

Timeline (6)

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.

2026-10-13 ARIN − Remove No substantive resource change found Strong inference
ARIN-Issued
Remove AS21987
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).

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2026-10-13: "Remove AS21987" source · retrieved
  2. Before ARIN delegated statistics 2026-10-12 (produced 2026-10-12T13:00:20+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2026-10-14 (produced 2026-10-14T13:00:21+00:00), after the report: reserved source · retrieved
2025-12-08 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 2026-06-08. 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 2018-10-02) on 2025-12-07 and reserved on 2025-12-09. 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 2026-06-08. 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: AS21987 assigned on 2025-12-08, reserved on 2025-12-09 source · retrieved
  2. Before ARIN delegated statistics 2025-12-07 (produced 2025-12-07T14:00:48+00:00), before the report: assigned (dated 2018-10-02) source · retrieved
  3. After ARIN delegated statistics 2025-12-09 (produced 2025-12-09T14:00:47+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
2018-10-02 ARIN + Add Apparent reissuance of previously removed resource Observed only
ARIN-Issued
Add AS21987
Inventory
Likely issued from ARIN-controlled inventory

No transfer record matches. ARIN's statistics show it reserved on 2018-10-01 and assigned (dated 2018-10-02) on 2018-10-03. The tracker saw this range released from hold on 2018-10-01 (AS21987), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2018-10-01: Remove AS21987), so the before-and-after statistics may include it.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2018-10-02: "Add AS21987" source · retrieved
  2. Before ARIN delegated statistics 2018-10-01 (produced 2018-10-01T05:00:15+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2018-10-03 (produced 2018-10-03T05:00:16+00:00), after the report: assigned (dated 2018-10-02) source · retrieved
Classification history for this change (4 versions)
  1. : Apparent reissuance of previously removed resource, observed only (classifier 1.3.0)
  2. : Apparent reissuance of previously removed resource, observed only (classifier 1.3.1)
  3. : Apparent reissuance of previously removed resource, observed only (classifier 1.3.2)
  4. : Apparent reissuance of previously removed resource, observed only (classifier 1.4.0) current
2018-10-01 ARIN − Remove Released from hold (ARIN lists it as 'available') Observed only
ARIN-Issued
Remove AS21987
Inventory
ARIN's statistics now list it as 'available'; reissue not confirmed

ARIN's statistics show it reserved on 2018-09-30 and available on 2018-10-02. 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 2018-07-10, 83 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2018-10-02: Add AS21987), so the before-and-after statistics may include it.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2018-10-01: "Remove AS21987" source · retrieved
  2. Before ARIN delegated statistics 2018-09-30 (produced 2018-09-30T05:00:14+00:00), before the report: reserved source · retrieved
  3. After ARIN delegated statistics 2018-10-02 (produced 2018-10-02T05:00:18+00:00), after the report: available source · retrieved
Classification history for this change (4 versions)
  1. : Released from hold (ARIN lists it as 'available'), observed only (classifier 1.3.0)
  2. : Released from hold (ARIN lists it as 'available'), observed only (classifier 1.3.1)
  3. : Released from hold (ARIN lists it as 'available'), observed only (classifier 1.3.2)
  4. : Released from hold (ARIN lists it as 'available'), observed only (classifier 1.4.0) current
2018-07-10 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 2019-01-10. 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 2015-02-12) on 2018-07-09 and reserved on 2018-07-11. 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 2019-01-10. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS21987 assigned on 2018-07-10, reserved on 2018-07-11 source · retrieved
  2. Before ARIN delegated statistics 2018-07-09 (produced 2018-07-09T05:00:24+00:00), before the report: assigned (dated 2015-02-12) source · retrieved
  3. After ARIN delegated statistics 2018-07-11 (produced 2018-07-11T05:00:24+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
2014-12-09 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 2015-06-09. 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 2001-07-24) on 2014-12-08 and reserved on 2014-12-10. 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 2015-06-09. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS21987 assigned on 2014-12-09, reserved on 2014-12-10 source · retrieved
  2. Before ARIN delegated statistics 2014-12-08 (produced 2014-12-08T06:05:15+00:00), before the report: assigned (dated 2001-07-24) source · retrieved
  3. After ARIN delegated statistics 2014-12-10 (produced 2014-12-10T06:04:29+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

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/21987.json