AS204064 CEZNET s.r.o. 🇨🇿 CZ

Announcing 6 prefixes, seen at the RIS collectors.

IPv4 prefixes

4,352 (17 × /24)

IPv6 prefixes

8 × /32

Upstreams

transit providers observed

Peers

settlement-free adjacencies

Downstreams

transit customers observed

Customer cone

ASes reachable through it

Registry and operator data

AS number: AS204064
Name: CEZNET s.r.o.
Organisation: CEZNET s.r.o.
Country: 🇨🇿 CZ
RIR: RIPENCC
Allocated: 2015-09-03

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

6 valid (100.0%) 0 invalid (0.0%) 0 no ROA (0.0%)

Whois

Fetched from whois.ripe.net

as-block:       AS203940 - AS205662
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2026-03-05T15:29:31Z
last-modified:  2026-03-05T15:29:31Z
source:         RIPE

aut-num:        AS204064
as-name:        CEZNET-AS
descr:          CEZNET s.r.o.
descr:          TAN
org:            ORG-TBS13-RIPE
import:         from AS47232 accept ANY
export:         to AS47232 announce AS204064
import:         from AS39392 accept ANY
export:         to AS39392 announce AS204064
admin-c:        CH13482-RIPE
tech-c:         CH13482-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CEZNET-MNT
created:        2015-09-03T12:31:29Z
last-modified:  2025-09-12T10:26:04Z
source:         RIPE

organisation:   ORG-TBS13-RIPE
org-name:       CEZNET s.r.o.
country:        CZ
reg-nr:         26378191
org-type:       LIR
address:        Duhova 1531/3
address:        140 00
address:        Praha 4
address:        CZECH REPUBLIC
phone:          +420 211 046 699
admin-c:        CH13482-RIPE
tech-c:         CH13482-RIPE
abuse-c:        CH13482-RIPE
mnt-ref:        CEZNET-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CEZNET-MNT
created:        2017-04-26T07:50:49Z
last-modified:  2026-05-13T07:38:07Z
source:         RIPE # Filtered

role:           CEZNET hostmaster
address:        CEZNET s.r.o.
address:        Vilemovska 1602
address:        Tachov
address:        347 01
address:        The Czech Republic
abuse-mailbox:  dohled@ceznet.cz
phone:          +420 211 046 699
admin-c:        MV6352-RIPE
tech-c:         KD4331-RIPE
tech-c:         MJ83172-RIPE
nic-hdl:        CH13482-RIPE
mnt-by:         CEZNET-MNT
created:        2024-01-12T08:23:53Z
last-modified:  2024-01-12T08:25:01Z
source:         RIPE # Filtered