asn.dev

Autonomous system

AS201913 THEOREMA-EXT Theorema Telecom Limited

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 1 0 downstream
Flagged prefixes 0 none

Summary

Theorema Telecom Limited

Russian Federation · AI-generated

telecom residential russia

THEOREMA-EXT is operated by Theorema Telecom Limited.

What it's used for

  • The address space carries subscriber traffic, indicated by the netname TT-SUBSCIBER-ADDON1 associated with the single announced prefix.
  • The AS announces 256 IPv4 addresses across 1 prefix with 1 observed neighbour, a ratio consistent with an access network providing connectivity to end-users.
  • Traffic from this AS consists of residential subscriber data, as Theorema Telecom Limited is a telecommunications provider in the Russian Federation.

Notable

  • The registrant for the prefix 185.77.11.0/24 is listed as Abuse-C Role with netname TT-SUBSCIBER-ADDON1, which aligns with the operator's identity as a telecom provider managing subscriber space.
  • The inventory consists of a single /24 block, representing a compact address estate typical for a regional or specialized access 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

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

Transit providers

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS20632PJSC MegaFon59

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-03, 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
AS201913
Registry name
THEOREMA-EXT
Registrant
AS39046-MNT
Abuse contact
lir@teorema.info
Registered
2022-10-25
Last changed
2024-08-02
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS201913
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS201913

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: 448 networks and 1,851 prefixes, as published 2026-11-04. 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