asn.dev

Autonomous system

AS21127 ZSTTKAS Novosibirsk, Russia

Unclassified RIPE

IPv4 addresses 215K 187 prefixes
IPv6 prefixes 21 counted as prefixes, not addresses
Countries 1 mostly RU
Exchanges 0 recorded by PCH
Upstreams 1 8 downstream
Flagged prefixes 0 none

Summary

TransTeleCom

Russian Federation · AI-generated

isp residential telecom russia

ZSTTKAS is operated by TransTeleCom, a major Russian telecommunications provider.

What it's used for

  • The address space carries residential and business customer traffic, evidenced by reverse DNS entries like host-46-50-232-0.bbcustomer.zsttk.net and netnames such as ZSTTK-RTL-NET and RU-TTKS-20120126.
  • With 214,528 IPv4 addresses announced across 187 prefixes and only 8 observed neighbours, the high address-to-neighbour ratio indicates an access network serving end-users rather than a transit provider.

Notable

  • Registrants include ZSTTK NOC, TTK-Svyaz, and Joint Stock Company TransTeleCom, reflecting the corporate structure and subsidiaries of the TransTeleCom group.
  • The address inventory is finely subdivided into numerous /20 and /21 blocks, consistent with a large-scale ISP managing distinct customer segments or regional sites.

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, 8 downstream and 10 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS20485Joint Stock Company TransTeleCom3,159

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 187 prefixes · 215K addresses IPv6 21 prefixes

CountryNamePrefixes
RURussian Federation208

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21127
Registry name
ZSTTKAS
Registrant
Joint Stock Company TransTeleCom
Abuse contact
abuse@ttk.ru
Registered
2002-08-01
Last changed
2025-07-22
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
67% valid · 186 valid, 90 with no ROA
ROAs
8 authorising AS21127
ASPA
no ASPA record
IRR
99.6% registered · 275 of 276 announcements
Route objects
68 naming AS21127

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: 432 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