rirtracker

IPv4 range · 2,048 addresses

37.77.144.0/21

Now

RIPE NCC statistics
Allocated (dated 2021-08-02), allocated (dated 2021-08-03) (CZ, GB, NL, RU, SC, US), in the latest file
Registry
RIPE NCC
Holder
Not looked up
From
The RIPE NCC's latest statistics

Latest change

Released Released from hold (the RIPE NCC lists it as 'available')

Reported
2020-05-02 (RIPE NCC)
Confidence
Strong inference
Inventory
The RIPE NCC's statistics now list it as 'available'; reissue not confirmed

Timeline (4)

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.

2020-05-02 RIPE NCC Released Released from hold (the RIPE NCC lists it as 'available') Strong inference
Statistics
37.77.144.0/21 reserved on 2020-05-01, available on 2020-05-02
Inventory
The RIPE NCC's statistics now list it as 'available'; reissue not confirmed

The RIPE NCC's statistics show it reserved on 2020-05-01 and available on 2020-05-02. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2019-11-04, 180 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing the RIPE NCC's daily statistics: 37.77.144.0/21 reserved on 2020-05-01, available on 2020-05-02 source · retrieved
  2. Before RIPE NCC delegated statistics 2020-05-01 (produced 2020-05-01T21:59:59+00:00), before the change: reserved source · retrieved
  3. After RIPE NCC delegated statistics 2020-05-02 (produced 2020-05-02T21:59:59+00:00), after the change: available source · retrieved
Classification history for this change (4 versions)
  1. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.0)
  2. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.1)
  3. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.2)
  4. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.4.0) current
2016-04-23 RIPE NCC Released Released from hold (the RIPE NCC lists it as 'available') Strong inference
Statistics
37.77.144.0/21 reserved on 2016-04-22, available on 2016-04-23
Inventory
The RIPE NCC's statistics now list it as 'available'; reissue not confirmed

The RIPE NCC's statistics show it reserved on 2016-04-22 and available on 2016-04-23. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2015-10-26, 180 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing the RIPE NCC's daily statistics: 37.77.144.0/21 reserved on 2016-04-22, available on 2016-04-23 source · retrieved
  2. Before RIPE NCC delegated statistics 2016-04-22 (produced 2016-04-22T21:59:59+00:00), before the change: reserved source · retrieved
  3. After RIPE NCC delegated statistics 2016-04-23 (produced 2016-04-23T21:59:59+00:00), after the change: available source · retrieved
Classification history for this change (4 versions)
  1. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.0)
  2. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.1)
  3. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.3.2)
  4. : Released from hold (the RIPE NCC lists it as 'available'), strong inference (classifier 1.4.0) current
2015-10-26 RIPE NCC − Deregistered Removed (return, revocation or reclamation not publicly distinguishable) Strong inference
Statistics
37.77.144.0/21 allocated on 2015-10-25, reserved on 2015-10-26
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2016-04-23. Possible reissue candidate after this date; not confirmed available.

Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it allocated (dated 2012-02-02) on 2015-10-25 and reserved on 2015-10-26. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the estimated hold end is 2016-04-23. This does not confirm availability.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing the RIPE NCC's daily statistics: 37.77.144.0/21 allocated on 2015-10-25, reserved on 2015-10-26 source · retrieved
  2. Before RIPE NCC delegated statistics 2015-10-25 (produced 2015-10-25T22:59:59+00:00), before the change: allocated (dated 2012-02-02) source · retrieved
  3. After RIPE NCC delegated statistics 2015-10-26 (produced 2015-10-26T22:59:59+00:00), 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
2012-02-02 RIPE NCC + Registered Apparent new issuance Strong inference
Statistics
37.77.144.0/21 available on 2012-02-01, allocated on 2012-02-02
Inventory
Likely issued from RIPE NCC-controlled inventory

No transfer record matches. The RIPE NCC's statistics show it available on 2012-02-01 and allocated (dated 2012-02-02) on 2012-02-02. It moved from the RIPE NCC's unissued pool to an active registration dated around that day, so it appears to be newly issued by the RIPE NCC.

Evidence (3) · classifier 1.4.0,
  1. Statistics Found by comparing the RIPE NCC's daily statistics: 37.77.144.0/21 available on 2012-02-01, allocated on 2012-02-02 source · retrieved
  2. Before RIPE NCC delegated statistics 2012-02-01 (produced 2012-02-01T22:59:59+00:00), before the change: available source · retrieved
  3. After RIPE NCC delegated statistics 2012-02-02 (produced 2012-02-02T22:59:59+00:00), after the change: allocated (dated 2012-02-02) 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

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2026-09-15RIPE NCC37.77.145.0/24Transfer logIntra-RIPE NCC transfer
2025-12-04RIPE NCC37.77.149.0/24Transfer logIntra-RIPE NCC transfer
2025-07-17RIPE NCC37.77.144.0/24Transfer logIntra-RIPE NCC transfer
2024-05-28RIPE NCC37.77.150.0/24Transfer logIntra-RIPE NCC transfer
2024-05-21RIPE NCC37.77.146.0/24Transfer logIntra-RIPE NCC transfer
2024-05-21RIPE NCC37.77.148.0/24Transfer logIntra-RIPE NCC transfer
2024-02-01RIPE NCC37.77.147.0/24Transfer logIntra-RIPE NCC transfer
2023-08-25RIPE NCC37.77.151.0/24Transfer logIntra-RIPE NCC transfer
2021-08-03RIPE NCC37.77.151.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.144.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.145.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.146.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.147.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.148.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.149.0/24+ RegisteredApparent reissuance
2021-08-02RIPE NCC37.77.150.0/24+ RegisteredApparent reissuance
2019-11-04RIPE NCC37.77.144.0/22− DeregisteredRemoved
2019-11-04RIPE NCC37.77.148.0/22− DeregisteredRemoved
2018-06-13RIPE NCC37.77.144.0/22+ RegisteredApparent reissuance
2018-06-13RIPE NCC37.77.148.0/22+ RegisteredApparent reissuance

Transfer records (8)

Date (UTC)LogTypeRange movedFromTo
RIPE NCCResource transfer37.77.145.0/24 Like Media s.r.o. RIPE NCCIN8INITY GLOBAL LIMITED RIPE NCC
RIPE NCCResource transfer37.77.149.0/24 Splynx s.r.o. RIPE NCCGlobal Tech Distribution s.r.o. RIPE NCC
RIPE NCCResource transfer37.77.144.0/24 SC ITNS.NET SRL RIPE NCCtruview LLC RIPE NCC
RIPE NCCResource transfer37.77.150.0/24 Smartdata LLC RIPE NCCProton66 OOO RIPE NCC
RIPE NCCResource transfer37.77.146.0/24 Unitel LLC RIPE NCCiNet Ltd RIPE NCC
RIPE NCCResource transfer37.77.148.0/24 Mosnet LLC RIPE NCCiNet Ltd RIPE NCC
RIPE NCCResource transfer37.77.147.0/24 LIR LLC RIPE NCCiNet Ltd RIPE NCC
RIPE NCCResource transfer37.77.151.0/24 Surax Networks BV RIPE NCCVan Veen Beheer B.V. RIPE NCC

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/37.77.144.0-37.77.151.255.json