asn.dev

Autonomous system

AS56371 CRBG-AS

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 2 0 downstream
Flagged prefixes 0 none

Summary

Creditreform Bulgaria

Bulgaria · AI-generated

business corporate debt-collection

The AS handle CRBG-AS is held by Creditreform Bulgaria EOOD.

What it's used for

  • The space carries corporate infrastructure, evidenced by the netname CREDITREFORM and registrant A1 Bulgaria EAD Abuse associated with the single announced prefix.
  • The AS announces 256 IPv4 addresses across 1 prefix with 2 observed neighbours, indicating a small, self-contained corporate network rather than a transit or access provider.
  • Traffic from this AS consists of office workers and business endpoints for Creditreform Bulgaria, a debt collection and management agency established in 1993.

Notable

  • The registrant A1 Bulgaria EAD Abuse differs from the AS holder, suggesting the address space is leased from or managed in coordination with A1 Bulgaria, a major Bulgarian telecommunications operator.
  • The address inventory is minimal, consisting of a single /24 block, which fits the profile of a specific corporate site or internal estate rather than a broad service network.

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
AS8866Vivacom Bulgaria EAD34
AS41313"NOVATEL" EOOD27

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, 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
AS56371
Registry name
CRBG-AS
Registrant
Creditreform Bulgaria EOOD
Abuse contact
lir@a1.bg
Registered
2011-02-11
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS56371
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS56371

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 1,779 prefixes, as published 2026-10-22. 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