asn.dev

Autonomous system

AS35141 A1BG_RSS

Unclassified RIPE

IPv4 addresses 111K 150 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly BG
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

A1 Bulgaria

Bulgaria · AI-generated

telecom residential mobile bulgaria

The AS handle A1BG_RSS is operated by A1 Bulgaria EAD.

What it's used for

  • The address space carries residential and mobile traffic, evidenced by netnames such as BG-MTELNET-20070221, NADEVDA-MEGALAN, and LIULIN-MEGALAN.
  • The AS announces 111360 IPv4 addresses across 150 prefixes with only 1 observed neighbour, a ratio that indicates an access or eyeball network rather than a transit provider.

Notable

  • Registrants include A1 Bulgaria EAD Registry and Megalan Network hostmaster, with abuse contacts consistently pointing to A1 Bulgaria EAD.
  • A1 Bulgaria is part of the A1 Telekom Austria Group, reflecting the broader corporate structure of the operator.
  • The inventory consists of 150 IPv4 prefixes with no IPv6 prefixes announced, showing a purely IPv4-based address estate.

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
AS8717A1 Bulgaria EAD21,473

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, 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 150 prefixes · 111K addresses IPv6 0 prefixes

CountryNamePrefixes
BGBulgaria150

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS35141
Registry name
A1BG_RSS
Registrant
MNT-MEGALAN
Abuse contact
RIPE.Abuse@a1.bg
Registered
2005-06-09
Last changed
2023-09-14
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 361 valid, 0 with no ROA
ROAs
367 authorising AS35141
ASPA
no ASPA record
IRR
100% registered · 361 of 361 announcements
Route objects
361 naming AS35141

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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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