ASN Lookup Tool

Czech Telecommunication Office ctu.cz CZ CZ 5 Routes

AS Data

AS203208

AS203208Czech Telecommunication Office

AS Number 203208
AS Name CTU_AS4_2
Organization Czech Telecommunication Office(org-cto1-ripe)
Country CZ
Website ctu.cz
Number of IPv4 Routes 2
Number of IPv6 Routes 3
ASN type GOVERNMENT
Allocation Status ASSIGNED
Registry RIPE
Date Allocated 2016-03-08

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Use ASN data for AS203208 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
2a05:1c40::/30 ~317×10²⁷
185.68.214.0/24 256
2a05:1c44::/31 ~158×10²⁷
185.68.212.0/23 512
2a05:1c46::/32 ~79×10²⁷

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS203113 - AS203887'

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

% Information related to 'AS203208'

% Abuse contact for 'AS203208' is 'schmieds@ctu.cz'

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
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:  2025-07-07T11:38:26Z
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

% This query was served by the RIPE Database Query Service version 1.121.1 (BUSA)

Parsed Whois Response

Peers

AS Number Description Country
AS6855 Slovak Telekom, a.s. SK
AS12767 T Mobile Czech Republic a.s. CZ
AS5588 T Mobile Czech Republic a.s. CZ

Upstreams

AS Number Description Country
AS6855 Slovak Telekom, a.s. SK

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Frequently Asked Questions

ASN AS203208 is an Autonomous System Number used to identify a network for BGP internet routing.
AS203208 is listed under Czech Telecommunication Office.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.