asn.dev

Autonomous system

AS47681 RIOMEDIA

Unclassified RIPE

IPv4 addresses 1.02K 1 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

O2 Czech Republic

Czechia · AI-generated

residential isp czechia

RIOMEDIA is operated by O2 Czech Republic, a.s.

What it's used for

  • The space carries residential customer traffic, evidenced by the reverse DNS record 185-191-186-254.client.rionet.cz and the netname CZ-CZNET-20170224.
  • The AS announces 1024 IPv4 addresses across 1 prefix (185.191.184.0/22) and maintains 1 observed neighbour, a ratio characteristic of an access network rather than a transit provider.
  • Traffic from this AS consists of subscriber eyeballs for O2's fixed-line and mobile broadband services in the Czech Republic.

Notable

  • The registrant O2 Czech Republic, a.s. aligns with the AS holder, confirming consistent ownership of the address space.
  • The address inventory is a single contiguous /22 block, indicating a consolidated allocation for the operator's customer base.

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
AS16246O2 Czech Republic, a.s.58

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, 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 1 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
CZCzechia1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS47681
Registry name
RIOMEDIA
Registrant
AS5610-MTN
Abuse contact
abuse@o2.cz
Registered
2008-07-31
Last changed
2024-06-20
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS47681
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS47681

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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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