asn.dev

Autonomous system

AS28949 TUSNET-AS 8, Kliment Ohridski St.

Unclassified RIPE

IPv4 addresses 4.10K 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

Technical University of Sofia

Bulgaria · AI-generated

education university bulgaria

TUSNET-AS is operated by Technical University of Sofia.

What it's used for

  • The address space carries the university's network, identified by the netname BG-TUSNET and registrant Technical University of Sofia.
  • The AS announces 4096 IPv4 addresses within a single prefix (81.161.240.0/20) and has 2 observed neighbours, a ratio consistent with an on-site institutional network rather than a transit provider.

Notable

  • The RDAP registrant Technical University of Sofia aligns directly with the AS holder and the registry name TUSNET-AS.
  • The inventory consists of a single contiguous IPv4 block with no announced IPv6 prefixes, reflecting a compact, self-contained 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

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

ASNetworkPaths seen
AS8717A1 Bulgaria EAD789
AS6802Bulgarian Research and Education Network Association (BREN)282

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 1 prefixes · 4.10K addresses IPv6 0 prefixes

CountryNamePrefixes
BGBulgaria1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS28949
Registry name
TUSNET-AS
Registrant
Technical University of Sofia
Abuse contact
abuse@tu-sofia.bg
Registered
2003-04-16
Last changed
2025-12-23
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 17 valid, 0 with no ROA
ROAs
17 authorising AS28949
ASPA
no ASPA record
IRR
100% registered · 17 of 17 announcements
Route objects
19 naming AS28949

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