asn.dev

Autonomous system

AS28933 LTFE-AS

Unclassified RIPE

IPv4 addresses 16.64K 2 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly SI
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

University of Ljubljana, Faculty of Electrical Engineering

Slovenia · AI-generated

education research sl

LTFE-AS is operated by University of Ljubljana, Faculty of Electrical Engineering.

What it's used for

  • The address space carries academic and research infrastructure, evidenced by netnames SI-LT-FE-20091006 and LTFE-SI registered to the Faculty.
  • The AS announces 16,640 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a stub or internal network rather than a transit provider.

Notable

  • Registrants for both announced prefixes align with the AS holder, listing the University of Ljubljana, Faculty of Electrical Engineering.
  • The inventory consists of a large /18 block (212.101.128.0/18) and a small /24 block (195.47.197.0/24), reflecting a typical academic allocation pattern.

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
AS5603Telekom Slovenije, d.d.156

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 2 prefixes · 16.64K addresses IPv6 1 prefixes

CountryNamePrefixes
SISlovenia3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS28933
Registry name
LTFE-AS
Registrant
AS5603-MNT
Abuse contact
andrej.kos@fe.uni-lj.si
Registered
2003-04-10
Last changed
2023-02-23
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 3 valid, 0 with no ROA
ROAs
3 authorising AS28933
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
3 naming AS28933

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: 431 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