asn.dev

Autonomous system

AS39028 ULSK-AS

Unclassified RIPE

IPv4 addresses 27.39K 15 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly RU
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

ER-Telecom Holding (Ulyanovsk)

Russian Federation · AI-generated

residential isp ertelecom ulyanovsk

The AS handle ULSK-AS is held by JSC "ER-Telecom Holding", specifically its Ulyanovsk branch.

What it's used for

  • The address space carries residential and business subscriber traffic, evidenced by reverse DNS entries such as dynamic.ulsk.ertelecom.ru and static-business.ulsk.ertelecom.ru.
  • With 27,392 IPv4 addresses announced across 15 prefixes and only 1 observed neighbour, the network functions as an access provider rather than a transit hub.
  • Traffic consists of subscriber eyeballs for broadband internet access, with specific segments allocated for PPPoE dynamic and static business connections.

Notable

  • Registrants consistently identify JSC "ER-Telecom Holding" and its Ulyanovsk Branch, aligning with the AS holder.
  • The inventory is finely subdivided into /20, /21, and /23 blocks, reflecting site-by-site segmentation for different access technologies and customer tiers.
  • One reverse DNS record points to rostov.ertelecom.ru, indicating shared infrastructure or historical allocation within the broader ER-Telecom 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

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

ASNetworkPaths seen
AS9049JSC "ER-Telecom Holding"2,054

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 15 prefixes · 27.39K addresses IPv6 1 prefixes

CountryNamePrefixes
RURussian Federation16

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS39028
Registry name
ULSK-AS
Registrant
JSC "ER-Telecom Holding"
Abuse contact
abuse@domru.ru
Registered
2011-02-07
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
8% valid · 3 valid, 33 with no ROA
ROAs
1 authorising AS39028
ASPA
no ASPA record
IRR
100% registered · 36 of 36 announcements
Route objects
69 naming AS39028

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: 442 networks and 1,771 prefixes, as published 2026-10-15. 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