asn.dev

Autonomous system

AS31420 TERASYST-AS

Unclassified RIPE

IPv4 addresses 5.12K 6 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly BG
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Terasyst Ltd

Bulgaria · AI-generated

residential isp bulgaria access

TERASYST-AS is operated by Terasyst Ltd.

What it's used for

  • The address space carries static residential and business access, evidenced by reverse DNS entries such as 254.lan-za1-2.static.rozabg.com and 64-171-134-79.filibe.net.
  • The AS announces 5120 IPv4 addresses across 6 prefixes while maintaining only 2 observed neighbours, a ratio that indicates an access or eyeball network rather than a transit provider.

Notable

  • Registrants include Terasyst Ltd, Angelsoft NOC, and Angel Soft OOD, with netnames like TERASYST and BG-ANGELSOFT-20071022 appearing across the inventory.
  • The address inventory consists of six IPv4 prefixes, including a /21 and several /22 and /24 blocks, all located in Bulgaria.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS57344Telehouse EAD1,070
AS8717A1 Bulgaria EAD162

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 6 prefixes · 5.12K addresses IPv6 0 prefixes

CountryNamePrefixes
BGBulgaria6

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS31420
Registry name
TERASYST-AS
Registrant
AS8262-MNT
Abuse contact
abuse@rozabg.com
Registered
2004-05-11
Last changed
2023-07-06
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
60% valid · 12 valid, 8 with no ROA
ROAs
6 authorising AS31420
ASPA
no ASPA record
IRR
100% registered · 20 of 20 announcements
Route objects
26 naming AS31420

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: 442 networks and 1,782 prefixes, as published 2026-10-16. 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

Cross-check