Autonomous system
AS44143 A1SERBIA-AS
Unclassified RIPE
Summary
A1 Srbija
mobile residential isp serbia
A1SERBIA-AS is operated by A1 Srbija d.o.o., a Serbian mobile network operator owned by A1 Telekom Austria Group.
What it's used for
- The address space carries dynamic subscriber traffic, as evidenced by reverse DNS entries such as
188-120-107-254.dynamic.a1.rsand95-86-53-254.dynamic.a1.rs. - The AS announces 20,480 IPv4 addresses across 10 prefixes and 1 IPv6 prefix, with 9 observed routing neighbours; this ratio of address volume to peering points indicates an access network serving end-users rather than a transit provider.
- Traffic from this AS consists of mobile and fixed-line subscriber data, including web browsing, VoIP media, and application traffic from A1 Srbija's customer base.
Notable
- All registrants for the announced prefixes are listed as "A1 Serbia IP Admins; A1 Srbija d.o.o. Beograd; A1 SERBIA ABUSE-C", fully consistent with the AS holder.
- A1 Srbija is part of the A1 Telekom Austria Group, which operates mobile and fixed networks across Central and Eastern Europe.
- The inventory includes a mix of /20, /21, and /22 blocks, with netnames dated between 2007 and 2013, reflecting incremental allocation over time.
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 2 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Vienna Internet Exchange | Vienna, Austria | 2001:7f8:30:0:2:1:1:3004 |
| Serbian Open Exchange | Belgrade, Serbia | 185.1.27.34 |
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 11 prefixes · 22.53K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| RS | Serbia | 14 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS44143- Registry name
- A1SERBIA-AS
- Registrant
- A1 Srbija d.o.o. Beograd
- Abuse contact
- zloupotreba@a1.rs
- Registered
- 2007-11-23
- Last changed
- 2026-05-14
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 18 valid, 0 with no ROA
- ROAs
- 18 authorising AS44143
- ASPA
- no ASPA record
- IRR
- 100% registered · 18 of 18 announcements
- Route objects
- 18 naming AS44143
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