asn.dev

Autonomous system

AS201447 AS_CNB The Czech National Bank

Unclassified RIPE

IPv4 addresses 1.02K 3 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly CZ
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Czech National Bank

Czechia · AI-generated

government finance central-bank

AS_CNB is operated by The Czech National Bank.

What it's used for

  • The address space carries internal corporate infrastructure, identified by the netname CNBNET across all announced prefixes.
  • The AS announces 1024 IPv4 addresses across 3 prefixes with only 1 observed neighbour, indicating a small, self-contained internal network rather than a transit or access provider.
  • Traffic from this AS consists of internal administrative, financial, and supervisory systems for the central bank of the Czech Republic.

Notable

  • All registrants for the announced prefixes are listed as The Czech National Bank, matching the AS holder.
  • The address inventory is finely subdivided into three small blocks (one /23 and two /24s), consistent with site-by-site segmentation for a single corporate entity.

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
AS6855Slovak Telekom, a.s.244

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 3 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
CZCzechia3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS201447
Registry name
AS_CNB
Registrant
MNT-CNB
Abuse contact
abuse@cnb.cz
Registered
2022-11-09
Last changed
2022-11-09
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 4 with no ROA
ROAs
1 authorising AS201447
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
4 naming AS201447

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: 447 networks and 1,843 prefixes, as published 2026-11-01. 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