206208 looking glass

AS203208 Czech Telecommunication Office 🇨🇿 CZ

Announcing 5 prefixes, seen at the RIS collectors.

IPv4 prefixes
2
768 (3 × /24)
IPv6 prefixes
3
7 × /32
Upstreams
1
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it

Registry and operator data

AS number
AS203208
Name
Czech Telecommunication Office
Organisation
Czech Telecommunication Office
Country
🇨🇿 CZ
RIR
RIPENCC
Allocated
2016-03-08

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

0 valid (0.0%) 0 invalid (0.0%) 5 no ROA (100.0%)

Whois

Fetched from whois.ripe.net

as-block:       AS203113 - AS203887
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:        2024-11-12T15:22:00Z
last-modified:  2024-11-12T15:22:00Z
source:         RIPE

aut-num:        AS203208
as-name:        CTU_AS4_2
org:            ORG-CTO1-RIPE
import:         from AS5588 accept ANY
export:         to AS5588 announce AS203208
import:         from AS12767 accept ANY
export:         to AS12767 announce AS203208
admin-c:        SS41216-RIPE
tech-c:         JK16414-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         SUPER-CTU
created:        2016-03-08T14:32:58Z
last-modified:  2025-07-04T09:55:24Z
source:         RIPE

organisation:   ORG-CTO1-RIPE
org-name:       Czech Telecommunication Office
country:        CZ
reg-nr:         Not Applicable
org-type:       LIR
address:        Sokolovska 219
address:        19000
address:        Prague
address:        CZECH REPUBLIC
phone:          +420224004601
fax-no:         +420224004827
abuse-c:        AC28632-RIPE
mnt-ref:        SUPER-CTU
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         SUPER-CTU
created:        2014-08-11T09:41:33Z
last-modified:  2026-05-13T07:13:32Z
source:         RIPE # Filtered
admin-c:        SS41216-RIPE

person:         Jan Krusina
address:        Sokolovska 219, Prague, 19000, Czech Republic
phone:          +420224004667
nic-hdl:        JK16414-RIPE
mnt-by:         SUPER-CTU
created:        2025-07-04T09:38:42Z
last-modified:  2025-07-04T09:38:42Z
source:         RIPE

person:         Stanislav Schmied
address:        Sokolovska 219, Prague, 19000, Czech Republic
phone:          +420224004601
nic-hdl:        SS41216-RIPE
mnt-by:         SUPER-CTU
created:        2025-07-04T09:01:31Z
last-modified:  2025-07-04T09:01:31Z
source:         RIPE