asn.dev

Autonomous system

AS48853 SEVMASH-AS JSC PO Sevmash

Unclassified RIPE

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly RU
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

JSC PO Sevmash

Russian Federation · AI-generated

business shipbuilding corporate

SEVMASH-AS is held by JSC PO Sevmash.

What it's used for

  • The space carries corporate infrastructure for a major shipbuilding enterprise, identified by the netname RU-SEVMASH and registrant JSC PO Sevmash.
  • The AS announces a single IPv4 prefix, 193.25.191.0/24, comprising 256 addresses, with 0 IPv6 prefixes.
  • With only 2 observed neighbours, the network functions as a small, isolated corporate estate rather than a transit or access provider.
  • Traffic from this AS consists of internal corporate communications, engineering systems, and administrative endpoints for the shipyard located in Severodvinsk.

Notable

  • The RDAP registrant JSC PO Sevmash aligns directly with the AS holder and the netname RU-SEVMASH.
  • JSC PO Sevmash is a subsidiary of the United Shipbuilding Corporation, a vertically integrated state-owned enterprise responsible for submarine construction and repair.
  • The address inventory is minimal, consisting of a single /24 block, which is typical for a specific site or department within a larger corporate network.

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

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS20632PJSC MegaFon57
AS8359MTS PJSC1

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-05, 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 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
RURussian Federation1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS48853
Registry name
SEVMASH-AS
Registrant
IPADDRESS-RU
Abuse contact
john@sevmash.ru
Registered
2018-06-28
Last changed
2026-01-12
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS48853
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS48853

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: 454 networks and 1,854 prefixes, as published 2026-11-06. 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