Autonomous system
AS5603 SIOL-NET Telekom Slovenije d.d.
Mobile RIPE
Summary
Telekom Slovenije
isp mobile eyeball backbone
Telekom Slovenije (SIOL-NET) is Slovenia's incumbent telecom operator, providing mobile, fixed broadband, and TV services under the Telekom Slovenije and SiOL brands.
What it's used for
- Mobile data plus fixed broadband, IPTV, and enterprise connectivity across Slovenia.
Notable
- The national incumbent and a major "eyeball" network — addresses here are mostly consumer mobile devices and home connections.
- Runs the country's largest mobile network alongside its legacy fixed-line infrastructure.
Interesting
- The SiOL brand was Slovenia's pioneering internet service and remains part of the Telekom Slovenije group's identity.
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
Internet exchanges
Recorded at 3 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.194.84 |
| Vienna Internet Exchange | Vienna, Austria | 193.203.0.71 |
| Slovenian Internet Exchange | Ljubljana, Slovenia | 91.220.194.5 |
Transit providers
24 upstream, 125 downstream and 189 adjacent networks observed; most-used upstreams first.
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
IPv4 40 prefixes · 782K addresses IPv6 21 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SI | Slovenia | 61 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS5603- Registry name
- SIOL-NET
- Registrant
- AS5603-MNT
- Abuse contact
- abuse@telekom.si
- Registered
- 2002-09-19
- Last changed
- 2026-09-21
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 98% valid · 93 valid, 2 with no ROA
- ROAs
- 93 authorising AS5603
- ASPA
- no ASPA record
- IRR
- 100% registered · 95 of 95 announcements
- Route objects
- 96 naming AS5603
Reputation
Classification and threat
Mobile Cellular carrier. Addresses are shared by many handsets via CGNAT.
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