rirtracker

IPv4 range · 65,536 addresses

131.161.0.0/16

Now

LACNIC statistics
Allocated (62 records, dated 2014-09-08 to 2020-07-07), assigned (2 records, dated 2014-09-12 to 2014-09-30) (AR, BR, BZ, CL, EC, HN, MX, PE, PY, SX), in the latest file
Registry
LACNIC
Holder
Not looked up
From
LACNIC's latest statistics

Latest change

Released Released from hold (LACNIC lists it as 'available')

Reported
2014-04-23 (LACNIC)
Confidence
Strong inference
Inventory
LACNIC'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.

2014-04-23 LACNIC Released Released from hold (LACNIC lists it as 'available') Strong inference
Statistics
131.161.0.0/16 reserved on 2014-04-22, available on 2014-04-23
Inventory
LACNIC's statistics now list it as 'available'; reissue not confirmed

LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. LACNIC moved it from its reserved (held) records to the status it calls 'available'. 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: 131.161.0.0/16 reserved on 2014-04-22, available on 2014-04-23 source · retrieved
  2. Before LACNIC delegated statistics 2014-04-22, before the change: reserved source · retrieved
  3. After LACNIC delegated statistics 2014-04-23, 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
2010-03-26 ARIN − Remove Unresolved change Observed only
ARIN-Issued
Remove 131.161.0.0-131.161.255.255
Inventory
Inventory effect unknown

ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2010-03-25 and not issued on 2010-03-27. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.

Evidence (3) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2010-03-26: "Remove 131.161.0.0-131.161.255.255" source · retrieved
  2. Before ARIN delegated statistics 2010-03-25, before the report: not issued source · retrieved
  3. After ARIN delegated statistics 2010-03-27, after the report: not issued source · retrieved
Classification history for this change (4 versions)
  1. : Unresolved change, observed only (classifier 1.3.0)
  2. : Unresolved change, observed only (classifier 1.3.1)
  3. : Unresolved change, observed only (classifier 1.3.2)
  4. : Unresolved change, observed only (classifier 1.4.0) current
2009-03-24 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 2009-05-23. 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 allocated (dated 1988-12-09) on 2009-03-23 and not issued on 2009-03-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2009-05-23. 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: 131.161.0.0/16 allocated on 2009-03-24, not listed on 2009-03-25 source · retrieved
  2. Before ARIN delegated statistics 2009-03-23, before the report: allocated (dated 1988-12-09) source · retrieved
  3. After ARIN delegated statistics 2009-03-25, after the report: not issued 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

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2026-11-12RIPE NCC131.161.200.0/22Transfer logTransfer into the RIPE NCC
2026-04-17LACNIC131.161.176.0/22+ RegisteredRestored
2026-04-14LACNIC131.161.176.0/22− DeregisteredRemoved
2025-03-06LACNIC131.161.156.0/22Transfer logIntra-LACNIC transfer
2024-11-07LACNIC131.161.160.0/22Transfer logIntra-LACNIC transfer
2024-05-13LACNIC131.161.72.0/22Transfer logIntra-LACNIC transfer
2022-05-30LACNIC131.161.44.0/22+ RegisteredRestored
2022-05-26LACNIC131.161.44.0/22− DeregisteredRemoved
2020-07-07LACNIC131.161.220.0/22+ RegisteredApparent reissuance
2020-07-01LACNIC131.161.8.0/22+ RegisteredApparent reissuance
2020-03-17LACNIC131.161.8.0/22ReleasedHold released
2020-03-17LACNIC131.161.220.0/22ReleasedHold released
2018-05-25LACNIC131.161.56.0/22Transfer logIntra-LACNIC transfer
2017-07-27LACNIC131.161.8.0/22− DeregisteredRemoved
2017-07-27LACNIC131.161.220.0/22− DeregisteredRemoved
2014-10-27LACNIC131.161.36.0/22+ RegisteredApparent new issuance
2014-10-25LACNIC131.161.36.0/22ReleasedHold released
2014-10-17LACNIC131.161.104.0/22+ RegisteredApparent new issuance
2014-10-14LACNIC131.161.164.0/22+ RegisteredApparent new issuance
2014-10-14LACNIC131.161.244.0/22+ RegisteredApparent new issuance
2014-10-10LACNIC131.161.36.0/22ReleasedHold released
2014-10-10LACNIC131.161.196.0/22+ RegisteredApparent new issuance
2014-10-10LACNIC131.161.252.0/22+ RegisteredApparent new issuance
2014-10-08LACNIC131.161.228.0/22+ RegisteredApparent new issuance
2014-10-07LACNIC131.161.68.0/22+ RegisteredApparent new issuance
2014-10-07LACNIC131.161.164.0/22ReleasedHold released
2014-10-07LACNIC131.161.248.0/22+ RegisteredApparent new issuance
2014-10-06LACNIC131.161.204.0/22+ RegisteredApparent new issuance
2014-10-06LACNIC131.161.208.0/22+ RegisteredApparent new issuance
2014-10-06LACNIC131.161.212.0/22+ RegisteredApparent new issuance
2014-10-03LACNIC131.161.224.0/22+ RegisteredApparent new issuance
2014-10-02LACNIC131.161.92.0/22+ RegisteredApparent new issuance
2014-10-02LACNIC131.161.104.0/22ReleasedHold released
2014-10-02LACNIC131.161.220.0/22+ RegisteredApparent new issuance
2014-10-01LACNIC131.161.32.0/22+ RegisteredApparent new issuance
2014-10-01LACNIC131.161.240.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.96.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.156.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.180.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.188.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.216.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.232.0/22+ RegisteredApparent new issuance
2014-09-30LACNIC131.161.236.0/22+ RegisteredApparent new issuance
2014-09-29LACNIC131.161.84.0/22+ RegisteredApparent new issuance
2014-09-29LACNIC131.161.192.0/22+ RegisteredApparent new issuance
2014-09-27LACNIC131.161.68.0/22ReleasedHold released
2014-09-27LACNIC131.161.84.0/22ReleasedHold released
2014-09-27LACNIC131.161.92.0/22ReleasedHold released
2014-09-26LACNIC131.161.124.0/22+ RegisteredApparent new issuance
2014-09-26LACNIC131.161.200.0/22+ RegisteredApparent new issuance
2014-09-25LACNIC131.161.36.0/22ReleasedHold released
2014-09-25LACNIC131.161.116.0/22+ RegisteredApparent new issuance
2014-09-25LACNIC131.161.144.0/22+ RegisteredApparent new issuance
2014-09-25LACNIC131.161.176.0/22+ RegisteredApparent new issuance
2014-09-24LACNIC131.161.32.0/22ReleasedHold released
2014-09-24LACNIC131.161.184.0/22+ RegisteredApparent new issuance
2014-09-23LACNIC131.161.8.0/22+ RegisteredApparent new issuance
2014-09-23LACNIC131.161.120.0/22+ RegisteredApparent new issuance
2014-09-23LACNIC131.161.128.0/22+ RegisteredApparent new issuance
2014-09-23LACNIC131.161.152.0/22+ RegisteredApparent new issuance

Transfer records (5)

Date (UTC)LogTypeRange movedFromTo
RIPE NCCResource transfer131.161.200.0/22 (no name given) LACNICZugspitze Ventures OU RIPE NCC
LACNICResource transfer131.161.156.0/22 MLM WIRELESS LACNICEmex Internet LACNIC
LACNICResource transfer131.161.160.0/22 MUNIZ NET COMUNICACAO MULTIMIDIA LTDA LACNICPALMA COMERCIO DE MATERIAIS DE INFORMATICA LTDA LACNIC
LACNICResource transfer131.161.72.0/22 UDS SOLUÇÕES DIGITAIS LTDA LACNICVSX NETWORKS LTDA LACNIC
LACNICResource transfer131.161.56.0/22 CHILENETWORKS SPA LACNICMegacable Comunicaciones de Mexico, S.A. de C.V. LACNIC

Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv4 range (ARIN's from 2009, the RIPE NCC's from 2012, APNIC's from 2010, LACNIC's from 2016, AFRINIC's from 2018). A transfer between two registries is in both logs.

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/131.161.0.0-131.161.255.255.json