Autonomous system
AS39251 NETGUARD NETGUARD LLC
Unclassified RIPE
Summary
NetGuard
isp residential bulgaria nsp
NETGUARD is operated by NetGuard LLC, a Bulgarian internet service provider.
What it's used for
- The address space carries residential and business subscriber traffic, evidenced by netnames such as
BG-NETGUARD-20070209andNetguard_Plovdivassociated with registrantNETGUARD LLC. - The AS announces 22,272 IPv4 addresses across 22 prefixes and 1 IPv6 prefix, while maintaining 58 observed neighbours; this ratio of moderate address space to high peering density indicates a regional access provider purchasing transit and peering for local connectivity.
- Traffic from this AS consists of subscriber eyeballs and local business endpoints within Bulgaria, consistent with NetGuard's role as a national ISP.
Notable
- Registrants for the majority of prefixes are
NETGUARD LLC, aligning with the AS holder; however, the prefix85.130.72.0/22is registered toA1 Bulgaria EAD Abuseunder the netnameNetguard-LTD, suggesting a historical transfer or lease from the former A1 Bulgaria infrastructure. - The inventory is composed of a mix of /20, /21, /22, /23, and /24 blocks, with the largest allocations being
77.76.16.0/20and91.92.80.0/20.
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 | 185.1.226.16 |
| Bulgarian Internet eXchange | Sofia, Bulgaria | 193.169.198.210 |
| Balkan Internet Exchange | Sofia, Bulgaria | 185.1.30.32 |
Transit providers
13 upstream, 4 downstream and 21 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS1299 | Arelion Sweden AB | 1,071 |
| AS3356 | Level 3 Parent, LLC | 1,046 |
| AS174 | Cogent Communications, LLC | 856 |
| AS3257 | GTT Communications Inc. | 585 |
| AS6939 | Hurricane Electric LLC | 554 |
| AS8280 | SYNAPSECOM S.A. Provider of Telecommunications and Internet Services | 74 |
| AS3303 | Swisscom (Schweiz) AG | 73 |
| AS208972 | GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI | 73 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 22 prefixes · 22.27K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BG | Bulgaria | 23 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS39251- Registry name
- NETGUARD
- Registrant
- NETGUARDBG-MNT
- Abuse contact
- abuse@netguard.bg
- Registered
- 2006-01-18
- Last changed
- 2024-05-24
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 74 valid, 0 with no ROA
- ROAs
- 36 authorising AS39251
- ASPA
- no ASPA record
- IRR
- 100% registered · 74 of 74 announcements
- Route objects
- 82 naming AS39251
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: 449 networks and 1,846 prefixes, as published 2026-11-03. 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