Autonomous system
AS56344 ASVIRIDIUM
Residential RIPE Cable/DSL/ISP
Summary
Viridium.cz
isp residential czechia cable
The AS handle ASVIRIDIUM is held by Viridium.cz s.r.o.
What it's used for
- The address space carries residential and small business internet access, as indicated by the PeeringDB classification of "Cable/DSL/ISP" and the company's self-description as a telecommunications partner.
- The network announces 1024 IPv4 addresses in a single /22 prefix (91.225.84.0/22) and one IPv6 /48 prefix (2001:67c:2f18::/48).
- With 18 observed neighbours, the network functions as a regional access provider, connecting end-user traffic to the broader internet.
Notable
- The RDAP registrant for the announced prefix is Viridium.cz s.r.o., which matches the AS holder.
- The address inventory consists of a single contiguous IPv4 block and a single IPv6 block, typical for a regional ISP managing its own allocated space.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| NIX.CZ - Neutral Internet eXchange for the Czech Republic | Prague, Czech Republic | 91.210.16.94 |
Transit providers
6 upstream, 0 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 1.02K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 2 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS56344- Registry name
- ASVIRIDIUM
- Registrant
- Viridium.cz s.r.o.
- Abuse contact
- lukas@viridium.cz
- Registered
- 2011-02-08
- Last changed
- 2020-11-16
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Viridium.cz
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
AS56344- Present at
- 1 exchanges
- Facilities
- 1 facilities
- Website
- http://www.viridium.cz
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
- RPKI
- 0% valid · 0 valid, 5 with no ROA
- ROAs
- 0 authorising AS56344
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 5 naming AS56344
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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