rirtracker

IPv4 range · 1,024 addresses

31.207.56.0/22

Now

ARIN statistics
Allocated (dated 2026-07-21), reserved (US), in the latest file
Registry
Not known
Holder
Not looked up

Latest change

+ Add Inter-RIR transfer into ARIN

Reported
2016-05-17 (ARIN)
Confidence
Confirmed
Inventory
Transferred into ARIN administration; not a new issuance

Timeline (2)

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.

2016-05-17 ARIN + Add Inter-RIR transfer into ARIN Confirmed
ARIN-Issued
Add 31.207.56.0-31.207.59.255
From
CEU Servers s.r.o. RIPE NCC
To
Whitestone Power & Communications ARIN
Same transfer
Also a change at the RIPE NCC, the sending registry: RIPE NCC, 2016-05-17. Lists that cover every registry show it there.
Inventory
Transferred into ARIN administration; not a new issuance

ARIN's transfer log records a transfer from CEU Servers s.r.o. (RIPE NCC) to Whitestone Power & Communications (ARIN) on 2016-05-17 15:08 UTC: it came to ARIN from the RIPE NCC. It was already issued by another registry, so this is not a new issuance.

Evidence (4) · classifier 1.4.0,
  1. ARIN-Issued ARIN-Issued report for 2016-05-17: "Add 31.207.56.0-31.207.59.255" source · retrieved
  2. Transfer log Transfer log: RESOURCE_TRANSFER on 2016-05-17 15:08 UTC, CEU Servers s.r.o. (RIPE NCC) to Whitestone Power & Communications (ARIN); resources moved: 31.207.56.0/22 source · retrieved
  3. Before ARIN delegated statistics 2016-05-16 (produced 2016-05-16T05:04:01+00:00), before the report: not listed source · retrieved
  4. After ARIN delegated statistics 2016-05-18 (produced 2016-05-18T05:03:46+00:00), after the report: allocated (dated 2016-05-17) source · retrieved
Classification history for this change (4 versions)
  1. : Inter-RIR transfer into ARIN, confirmed (classifier 1.3.0)
  2. : Inter-RIR transfer into ARIN, confirmed (classifier 1.3.1)
  3. : Inter-RIR transfer into ARIN, confirmed (classifier 1.3.2)
  4. : Inter-RIR transfer into ARIN, confirmed (classifier 1.4.0) current
2016-05-17 RIPE NCC Transfer log Inter-RIR transfer out of the RIPE NCC Confirmed
Transfer log
Transfer: CEU Servers s.r.o. (RIPE NCC) to (no name) (ARIN)
From
CEU Servers s.r.o. RIPE NCC
To
(no name given) ARIN
Same transfer
ARIN recorded it too: ARIN, 2016-05-17.
Inventory
Transferred out of RIPE NCC administration; not offered to RIPE NCC applicants

The RIPE NCC's transfer log records a transfer from CEU Servers s.r.o. (RIPE NCC) to an unnamed organization (ARIN) on 2016-05-17 19:00 UTC: it left the RIPE NCC for ARIN. It is not a new allocation and is not offered to RIPE NCC applicants.

Evidence (3) · classifier 1.4.0,
  1. Transfer log Transfer log: RESOURCE_TRANSFER on 2016-05-17 19:00 UTC, CEU Servers s.r.o. (RIPE NCC) to (no name) (ARIN); resources moved: 31.207.56.0/22 source · retrieved
  2. Before RIPE NCC delegated statistics 2016-05-16 (produced 2016-05-16T21:59:59+00:00), before the change: allocated (dated 2011-05-02) source · retrieved
  3. After RIPE NCC delegated statistics 2016-05-17 (produced 2016-05-17T21:59:59+00:00), after the change: not listed source · retrieved
Classification history for this change (4 versions)
  1. : Inter-RIR transfer out of the RIPE NCC, confirmed (classifier 1.3.0)
  2. : Inter-RIR transfer out of the RIPE NCC, confirmed (classifier 1.3.1)
  3. : Inter-RIR transfer out of the RIPE NCC, confirmed (classifier 1.3.2)
  4. : Inter-RIR transfer out of the RIPE NCC, confirmed (classifier 1.4.0) current

Changes to overlapping ranges

DateRegistryRangeRecorded asWhat happened
2026-07-21ARIN31.207.56.0/23+ AddIntra-ARIN transfer
2026-06-08ARIN31.207.58.0/23Not in ARIN-IssuedRemoved
2018-09-25ARIN31.207.58.0/23+ AddIntra-ARIN transfer
2011-05-03RIPE NCC31.207.0.0/18+ RegisteredApparent new issuance

Transfer records (4)

Date (UTC)LogTypeRange movedFromTo
ARINResource transfer31.207.56.0/23 Whitestone Power & Communications ARINHeritage NetWorks, LLC ARIN
ARINResource transfer31.207.58.0/23 Whitestone Power & Communications ARINVertical Broadband LLC ARIN
RIPE NCCResource transfer31.207.56.0/22 CEU Servers s.r.o. RIPE NCC(no name given) ARIN
ARINResource transfer31.207.56.0/22 CEU Servers s.r.o. RIPE NCCWhitestone Power & Communications ARIN

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.

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