asn.dev

Autonomous system

AS48746 ATSA-

Unclassified RIPE

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

Summary

BULATSA

Bulgaria · AI-generated

government aviation infrastructure

The AS handle ATSA- is held by BULATSA (Bulgarian Air Traffic Services Authority).

What it's used for

  • The space carries internal network infrastructure for the national Air Navigation Service Provider, as indicated by the netname ATSA-BG and registrant Air Traffic Services Authority.
  • The inventory consists of 256 IPv4 addresses within a single /24 prefix (91.212.37.0/24) and 0 IPv6 prefixes, with 2 observed routing neighbours.
  • Traffic from this AS consists of operational data, air traffic control systems, and administrative communications for the state-owned enterprise responsible for Bulgarian airspace.

Notable

  • The RDAP registrant Air Traffic Services Authority aligns with the AS handle ATSA- and the operator's official name.
  • BULATSA is a state-owned enterprise established to perform state functions for the provision of air navigation services in the Republic of Bulgaria.
  • The address inventory is a single contiguous /24 block, typical for a dedicated institutional network rather than a distributed 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

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

ASNetworkPaths seen
AS205132Vivacom Bulgaria EAD38
AS8717A1 Bulgaria EAD22

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, 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
BGBulgaria1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS48746
Registry name
ATSA-BG
Registrant
BT95-ADM
Abuse contact
emil.kostadinov@bulatsa.com
Registered
2009-01-29
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS48746
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS48746

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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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