asn.dev

Autonomous system

AS204784 SISTECH

Unclassified RIPE

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly BG
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

SIS Technology AD

Bulgaria · AI-generated

business bg ipv4

SISTECH is operated by SIS Technology AD.

What it's used for

  • The address space carries corporate infrastructure, evidenced by the netname SIS-TECHNOLOGY-IPV4-BLK and reverse DNS entries pointing to sistechnology.com (e.g., ip-64-61.sistechnology.com).
  • The AS announces 256 IPv4 addresses within a single /24 prefix (185.184.61.0/24) and has 1 observed neighbour, indicating a small, self-contained internal network rather than a transit or large access provider.
  • Traffic from this AS consists of internal corporate endpoints and services hosted by SIS Technology AD, a Bulgarian technology company.

Notable

  • The RDAP registrant SIS TECHNOLOGY AD matches the AS holder, confirming direct ownership of the announced space.
  • The inventory consists of a single contiguous /24 block with no IPv6 prefixes, representing a compact and simple 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

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

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS57619Varna Data Center EOOD60

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, 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 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
BGBulgaria1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS204784
Registry name
sistech
Registrant
lir-bg-psbg-1-MNT
Abuse contact
abuse@netwave-bg.com
Registered
2022-06-03
Last changed
2025-10-10
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS204784
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS204784

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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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