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	Prefix	Description
	193.0.231.0/24	Air Navigation Services of the Czech Republic, state ...
	2001:678:a20::/48	Air Navigation Services of the Czech Republic, state ...

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS6855	Slovak Telekom, a.s.	✔	✔
	AS5610	O2 Czech Republic, a.s.	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS5610	O2 Czech Republic, a.s.	✔	✔
	AS6855	Slovak Telekom, a.s.	✔	✔

aut-num:        AS15380
as-name:        ANSCZ
descr:          is czech national air traffic control organisation,
descr:          which controls whole air space over the Czech Republic
org:            ORG-ANSO1-RIPE
import:         from AS5610 action pref=100; accept ANY
import:         from AS25248 action pref=100; accept ANY
export:         to AS5610 announce AS15380
export:         to AS25248 announce AS15380
default:        to AS5610 action pref=100; networks ANY
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
notify:         hostmaster@iol.cz
mnt-by:         ANS-MNT
created:        2002-11-04T09:00:14Z
last-modified:  2017-11-15T09:20:08Z
source:         RIPE
sponsoring-org: ORG-STaN1-RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************


organisation:   ORG-ANSO1-RIPE
org-name:       Air Navigation Services of the Czech Republic, state enterprise
country:        CZ
org-type:       OTHER
address:        Dummy address for ORG-ANSO1-RIPE
# Email removed, Log into bgp.tools to see whois emails
abuse-c:        AR30107-RIPE
mnt-ref:        AS5610-MTN
mnt-by:         AS5610-MTN
created:        2013-05-14T06:26:17Z
last-modified:  2022-12-01T16:15:43Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************

Last Update: 2026-03-11T03:23:53Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-btn-customers	1495
RIPE	as-ctiol	218
LEVEL3	as-level3-origins-eu	0
RIPE	as-telenorczix	16
RIPE	as-gtscz-cust	137