rirtracker

IPv4 range · 1,024 addresses

131.221.152.0/22

Now

LACNIC statistics
Allocated (dated 2026-04-30) (BR), in the latest file
Registry
LACNIC
Holder
Not looked up
From
LACNIC's latest statistics

Latest change

+ Registered Apparent reissuance of previously removed resource

Reported
2026-04-30 (LACNIC)
Confidence
Strong inference
Inventory
Likely issued from LACNIC-controlled inventory

Timeline (7)

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.

2026-04-30 LACNIC + Registered Apparent reissuance of previously removed resource Strong inference
Statistics
131.221.152.0/22 reserved on 2026-04-29, allocated on 2026-04-30
Inventory
Likely issued from LACNIC-controlled inventory

No transfer record matches. LACNIC's statistics show it reserved on 2026-04-29 and allocated (dated 2026-04-30) on 2026-04-30. The tracker saw this range released from hold on 2026-04-16 (131.221.152.0/22), so it appears to have been issued again from LACNIC's pool.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 reserved on 2026-04-29, allocated on 2026-04-30 source · retrieved
  2. Before LACNIC delegated statistics 2026-04-29, before the change: reserved source · retrieved
  3. After LACNIC delegated statistics 2026-04-30, after the change: allocated (dated 2026-04-30) source · retrieved
Classification history for this change (5 versions)
  1. : Apparent reissuance of previously removed resource, strong inference (classifier 1.2.0)
  2. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.0)
  3. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.1)
  4. : Apparent reissuance of previously removed resource, strong inference (classifier 1.3.2)
  5. : Apparent reissuance of previously removed resource, strong inference (classifier 1.4.0) current
2026-04-16 LACNIC Released Released from hold (LACNIC lists it as 'available') Strong inference
Statistics
131.221.152.0/22 reserved on 2026-04-15, available on 2026-04-16
Inventory
LACNIC's statistics now list it as 'available'; reissue not confirmed

LACNIC's statistics show it reserved on 2026-04-15 and available on 2026-04-16. LACNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2025-08-15, 244 days earlier. That is LACNIC's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 reserved on 2026-04-15, available on 2026-04-16 source · retrieved
  2. Before LACNIC delegated statistics 2026-04-15, before the change: reserved source · retrieved
  3. After LACNIC delegated statistics 2026-04-16, after the change: available source · retrieved
Classification history for this change (5 versions)
  1. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.2.0)
  2. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.0)
  3. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.1)
  4. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.2)
  5. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.4.0) current
2025-08-15 LACNIC − Deregistered Removed (return, revocation or reclamation not publicly distinguishable) Strong inference
Statistics
131.221.152.0/22 allocated on 2025-08-14, reserved on 2025-08-15
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2026-02-15. Possible reissue candidate after this date; not confirmed available.

Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2023-06-15) on 2025-08-14 and reserved on 2025-08-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the estimated hold end is 2026-02-15. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 allocated on 2025-08-14, reserved on 2025-08-15 source · retrieved
  2. Before LACNIC delegated statistics 2025-08-14, before the change: allocated (dated 2023-06-15) source · retrieved
  3. After LACNIC delegated statistics 2025-08-15, after the change: 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
2023-06-15 LACNIC + Registered Apparent reissuance of previously removed resource Strong inference
Statistics
131.221.152.0/22 reserved on 2023-06-14, allocated on 2023-06-15
Inventory
Likely issued from LACNIC-controlled inventory

No transfer record matches. LACNIC's statistics show it reserved on 2023-06-14 and allocated (dated 2023-06-15) on 2023-06-15. The tracker saw this range released from hold on 2023-04-04 (131.221.152.0/22), so it appears to have been issued again from LACNIC's pool.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 reserved on 2023-06-14, allocated on 2023-06-15 source · retrieved
  2. Before LACNIC delegated statistics 2023-06-14, before the change: reserved source · retrieved
  3. After LACNIC delegated statistics 2023-06-15, after the change: allocated (dated 2023-06-15) 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
2023-04-04 LACNIC Released Released from hold (LACNIC lists it as 'available') Strong inference
Statistics
131.221.152.0/22 reserved on 2023-04-03, available on 2023-04-04
Inventory
LACNIC's statistics now list it as 'available'; reissue not confirmed

LACNIC's statistics show it reserved on 2023-04-03 and available on 2023-04-04. LACNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2022-10-28, 158 days earlier. That is LACNIC's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 reserved on 2023-04-03, available on 2023-04-04 source · retrieved
  2. Before LACNIC delegated statistics 2023-04-03, before the change: reserved source · retrieved
  3. After LACNIC delegated statistics 2023-04-04, after the change: available source · retrieved
Classification history for this change (4 versions)
  1. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.0)
  2. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.1)
  3. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.3.2)
  4. : Released from hold (LACNIC lists it as 'available'), strong inference (classifier 1.4.0) current
2022-10-28 LACNIC − Deregistered Removed (return, revocation or reclamation not publicly distinguishable) Strong inference
Statistics
131.221.152.0/22 allocated on 2022-10-27, reserved on 2022-10-28
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2023-04-28. Possible reissue candidate after this date; not confirmed available.

Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2014-10-15) on 2022-10-27 and reserved on 2022-10-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the estimated hold end is 2023-04-28. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 allocated on 2022-10-27, reserved on 2022-10-28 source · retrieved
  2. Before LACNIC delegated statistics 2022-10-27, before the change: allocated (dated 2014-10-15) source · retrieved
  3. After LACNIC delegated statistics 2022-10-28, after the change: 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
2014-10-15 LACNIC + Registered Apparent new issuance Strong inference
Statistics
131.221.152.0/22 available on 2014-10-14, allocated on 2014-10-15
Inventory
Likely issued from LACNIC-controlled inventory

No transfer record matches. LACNIC's statistics show it available on 2014-10-14 and allocated (dated 2014-10-15) on 2014-10-15. It moved from LACNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by LACNIC.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing LACNIC's daily statistics: 131.221.152.0/22 available on 2014-10-14, allocated on 2014-10-15 source · retrieved
  2. Before LACNIC delegated statistics 2014-10-14, before the change: available source · retrieved
  3. After LACNIC delegated statistics 2014-10-15, after the change: allocated (dated 2014-10-15) 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 new issuance, strong inference (classifier 1.4.0) current

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2014-04-23LACNIC131.221.0.0/16ReleasedHold released

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.

This page as data: ip/131.221.152.0-131.221.155.255.json