Autonomous system
AS39396 NBIS-AS
Residential RIPE
Summary
NBI Systems
isp residential cable bulgaria
NBIS-AS is operated by NBI Systems Ltd.
What it's used for
- The address space carries residential broadband and static IP services, evidenced by reverse DNS entries such as
giga2.ddns.nbis.net,vasilena.ddns.nbis.net, andstatic-ip-109-121-136-64.client.nbis.net. - The network announces 4,608 IPv4 addresses across 10 prefixes and 1 IPv6 prefix, while maintaining 39 observed neighbours; this ratio of address space to peering partners indicates a regional access provider rather than a transit hub.
- Traffic consists of subscriber eyeballs for broadband internet, digital coax TV, and wired telephone services in the city of Ruse, Bulgaria.
Notable
- Registrants for the largest prefixes are consistently
NBI Sistems LtdorAbuse-C Roleunder netnames likeBG-NBISISTEMI-20160212andBG-NBIS, aligning with the AS holder. - The inventory is composed of multiple /22, /23, and /24 blocks, including a /32 IPv6 prefix, reflecting a segmented local ISP 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 | 185.1.226.176 |
| Balkan Internet Exchange | Sofia, Bulgaria | 185.1.30.30 |
| T-CIX | Sofia, Bulgaria | 185.1.40.21 |
Transit providers
12 upstream, 1 downstream and 19 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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 4.61K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BG | Bulgaria | 11 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS39396- Registry name
- NBIS-AS
- Registrant
- NBIS-MNT
- Abuse contact
- abuse@nbis.net
- Registered
- 2006-02-14
- Last changed
- 2026-02-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 13 valid, 0 with no ROA
- ROAs
- 15 authorising AS39396
- ASPA
- no ASPA record
- IRR
- 100% registered · 13 of 13 announcements
- Route objects
- 18 naming AS39396
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: 440 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