Autonomous system
AS199711 NCISA-AS National Cyber and Information Security Agency
Unclassified APNIC
Summary
National Cyber and Information Security Agency
government security agency
NCISA-AS is operated by the National Cyber and Information Security Agency.
What it's used for
- The address space carries agency infrastructure, identified by netnames
NUKIB-BRNOandNUKIB-PRAHAassociated with the agency's Brno and Prague locations. - The AS announces 768 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 2 observed neighbours, indicating a small, self-contained government network rather than a transit or access provider.
- Traffic from this AS consists of internal agency communications and cybersecurity operations for the Czech Republic's national cyber defense.
Notable
- Registrants for both announced prefixes are
NCISA Admins; National Cyber and Information Security Agency, fully consistent with the AS holder. - The address inventory is finely subdivided into two distinct prefixes corresponding to specific geographic sites (Brno and Prague), reflecting a segmented internal corporate 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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-06, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 768 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 3 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS199711- Registry name
- NCISA-AS
- Registrant
- NBUCZ-MNT
- Abuse contact
- abuse@nukib.gov.cz
- Registered
- 2014-02-28
- Last changed
- 2022-11-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 2 authorising AS199711
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 8 naming AS199711
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: 454 networks and 1,854 prefixes, as published 2026-11-06. 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