asn.dev

Autonomous system

AS51973 KOLT-AS

Unclassified RIPE

IPv4 addresses 8.19K 2 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly RU
Exchanges 1 recorded by PCH
Upstreams 7 1 downstream
Flagged prefixes 0 none

Summary

Koltushsky Internet Ltd

Russian Federation · AI-generated

isp residential russia local

KOLT-AS is operated by Koltushsky Internet Ltd.

What it's used for

  • The address space carries residential and local internet access traffic, identified by the netname KOLT-NET and the registrant Koltushsky Internet Ltd.
  • The AS announces 8192 IPv4 addresses across 2 prefixes and maintains 33 observed neighbours, a ratio consistent with a regional access provider serving local subscribers.
  • Traffic from this AS consists of subscriber eyeballs and local internet access for residents in the Vsevolozhsk area of Leningrad Oblast.

Notable

  • Registrants for both announced prefixes match the AS holder, with Koltushsky Internet Ltd listed for 46.149.32.0/20 and 81.163.240.0/20.
  • The address inventory is compact, consisting of two /20 blocks, which is typical for a small, localized internet service provider.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
MSK-IX St. PetersburgSt. Petersburg, Russia194.226.102.94

Transit providers

7 upstream, 1 downstream and 10 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS35598INETCOM CARRIER LLC78
AS20764CJSC RASCOM75
AS24482SG.GS2
AS37721Virtual Technologies & Solutions2
AS49673Truenetwork LLC2
AS50673Serverius Holding B.V.2
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 2 prefixes · 8.19K addresses IPv6 1 prefixes

CountryNamePrefixes
RURussian Federation3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS51973
Registry name
KOLT-AS
Registrant
CHELNY-MNT
Abuse contact
abuse@kolt-internet.ru
Registered
2010-12-09
Last changed
2025-12-30
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS51973
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
7 naming AS51973

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check