Autonomous system
AS8717 A1
Residential RIPE
Summary
A1 Bulgaria
isp residential legacy
A1 Bulgaria EAD (A1BG, historically registered as SPECTRUMNET) — the fixed network of Bulgaria's A1, part of the A1 Telekom Austria Group and formerly known as Mobiltel/Mtel. Roughly a million IPv4 addresses across ~100 prefixes.
What it's used for
- Consumer broadband and cable/FTTH access. The rDNS is layered with the brands A1 absorbed on its way to becoming a fixed operator:
ip-IP-ADDR.home.megalan.bgon the Megalan FTTH pools and reversed-octet names underblizoo.bgon the former Blizoo cable footprint. - Business connectivity and hosting on the older Spectrum Net and Orbitel space (
spnet.netrouters and switches,orbitel.bg,ns1.a1hosting.bg).
Notable
- This is the fixed AS. A1 Bulgaria's mobile network is numbered separately, so reading this AS as a mobile carrier because of the A1 brand gets the kind wrong.
- The inventory is an acquisition archaeology: Spectrum Net (the original holder of the AS name), Orbitel, Megalan and Blizoo all still label their own former address ranges. Most of the consumer space carries no rDNS at all, which is typical for large cable pools.
- Very well connected for a national operator — hundreds of observed BGP neighbours, reflecting a mix of domestic peering and Telekom Austria Group upstreams.
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 5 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.229 |
| NetIX | Sofia, Bulgaria | 185.1.226.147 |
| Bulgarian Internet eXchange | Sofia, Bulgaria | 193.169.198.129 |
| Balkan Internet Exchange | Sofia, Bulgaria | 185.1.30.4 |
| Megaport MegaIX Sofia | Sofia, Bulgaria | 91.212.235.68 |
Transit providers
27 upstream, 168 downstream and 240 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 383 prefixes · 217K addresses IPv6 189 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BG | Bulgaria | 572 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8717- Registry name
- A1BG
- Registrant
- A1 Bulgaria EAD
- Abuse contact
- RIPE.Abuse@a1.bg
- Registered
- 2002-08-22
- Last changed
- 2026-09-28
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 107 valid, 0 with no ROA
- ROAs
- 115 authorising AS8717
- ASPA
- no ASPA record
- IRR
- 100% registered · 107 of 107 announcements
- Route objects
- 112 naming AS8717
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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