asn.dev

Autonomous system

AS41088 N_SYS s.r.o.

Unclassified RIPE

IPv4 addresses 9.22K 2 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly CZ
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

N_SYS s.r.o.

Czechia · AI-generated

isp residential cable czech

The AS handle N_SYS s.r.o. is held by N_SYS s.r.o.

What it's used for

  • The address space carries residential and business internet services, as indicated by the netnames CZ-NSYS-20060606 and CZ-NSYS-20151109 and the operator's self-description as providing "internet a chytrá televize" (internet and smart TV).
  • The network announces 9,216 IPv4 addresses across 2 prefixes and 2 IPv6 prefixes, with only 1 observed neighbour, indicating a local access provider rather than a transit hub.
  • Traffic from this AS consists of subscriber eyeballs and media streams for the cable/DSL/ISP services offered in the Náchod region of Czechia.

Notable

  • Registrants for both announced prefixes are consistently listed as "N_SYS s.r.o.", matching the AS holder.
  • The address inventory is compact, consisting of one /19 and one /22 block, typical of a regional cable operator.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS203072DomaTV s.r.o.188

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, 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 2 prefixes · 9.22K addresses IPv6 2 prefixes

CountryNamePrefixes
CZCzechia4

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS41088
Registry name
CZNSYS
Registrant
CZNSYS-MNT
Abuse contact
teichman@nsys.cz
Registered
2006-06-12
Last changed
2020-01-09
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 4 valid, 0 with no ROA
ROAs
4 authorising AS41088
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
4 naming AS41088

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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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