asn.dev

Autonomous system

AS39906 COPROSYS

Unclassified RIPE

IPv4 addresses 33.79K 31 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly CZ
Exchanges 1 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

CoProSys

Czechia · AI-generated

isp residential czech fiber

COPROSYS is operated by CoProSys a.s., a Czech internet service provider.

What it's used for

  • The address space carries residential and business internet access, evidenced by netnames such as CZ-COPROSYS-20061128 and CRFREENET-CZ, and a reverse DNS entry pointing to coprosys.cz.
  • The AS announces 33,792 IPv4 addresses across 31 prefixes and 2 IPv6 prefixes, with only 2 observed routing neighbours, indicating a local access network rather than a transit provider.
  • Traffic from this AS consists of subscriber eyeballs and local business endpoints served by CoProSys in the Czech Republic.

Notable

  • Registrants for the majority of prefixes are CoProSys a.s., consistent with the AS holder; one prefix (93.170.84.0/22) is registered to ALFA TELECOM s.r.o. under the netname PLZEN-NETWORK.
  • The address inventory is finely subdivided into multiple /20, /21, /22, and /24 blocks, reflecting site-by-site or regional segmentation of the ISP's 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

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
NIX.CZ - Neutral Internet eXchange for the Czech RepublicPrague, Czech Republic91.210.16.53

Transit providers

1 upstream, 1 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS203072DomaTV s.r.o.727

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 31 prefixes · 33.79K addresses IPv6 2 prefixes

CountryNamePrefixes
CZCzechia33

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS39906
Registry name
COPROSYS
Registrant
COPROSYS-MNT
Abuse contact
abuse@coprosys.cz
Registered
2006-05-12
Last changed
2018-09-04
Allocation
allocated

Declared

PeeringDB profile

self-reported
Name
CoProSys
Scope
Not Disclosed
Traffic ratio
Not Disclosed

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 13 valid, 0 with no ROA
ROAs
13 authorising AS39906
ASPA
no ASPA record
IRR
100% registered · 13 of 13 announcements
Route objects
23 naming AS39906

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