Autonomous system
AS20911 NETSURF-AS-
Residential RIPE
Summary
Net-Surf.net
isp residential cable bulgaria
NETSURF-AS- is operated by Net-Surf.net Ltd., a Bulgarian internet service provider.
What it's used for
- The address space carries residential broadband traffic, evidenced by netnames such as
NET-SURFNET-GPONandNETSURFNET-BROADBAND, and reverse DNS entries likeip-95-111-122-0.home.megalan.bg. - The AS announces 36608 IPv4 addresses across 25 prefixes and maintains 49 observed neighbours, a ratio consistent with an access network providing connectivity to end-users rather than a transit provider.
Notable
- Registrants are predominantly
Net-Surf.net Ltd., though some prefixes like78.90.248.0/21and95.111.120.0/21listA1 Bulgaria EAD Abuse, suggesting historical acquisition or lease of address space from A1 Bulgaria. - The inventory consists of a mix of larger blocks like
178.254.192.0/18and numerous smaller /23 and /24 prefixes, indicating a fragmented or historically accumulated 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
Internet exchanges
Recorded at 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| NetIX | Sofia, Bulgaria | 185.1.226.29 |
| Bulgarian Internet eXchange | Sofia, Bulgaria | 193.169.198.215 |
| Balkan Internet Exchange | Sofia, Bulgaria | 185.1.30.22 |
Transit providers
15 upstream, 1 downstream and 16 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 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 25 prefixes · 36.61K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BG | Bulgaria | 25 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS20911- Registry name
- NETSURF-AS-BG
- Registrant
- NETSURF-MNTR
- Abuse contact
- abuse@net-surf.net
- Registered
- 2002-02-04
- Last changed
- 2025-12-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 177 valid, 0 with no ROA
- ROAs
- 164 authorising AS20911
- ASPA
- no ASPA record
- IRR
- 100% registered · 177 of 177 announcements
- Route objects
- 190 naming AS20911
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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