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	Prefix	Description
	78.31.24.0/21	ICZ a.s.
	192.108.126.0/24	ICZ a.s.
	2001:67c:1578::/48	ICZ a.s.

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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.	✔	✔
	AS5578	SWAN, a.s.	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS6855	Slovak Telekom, a.s.	✔	✔
	AS5610	O2 Czech Republic, a.s.	✔	✔
	AS5578	SWAN, a.s.	✔	✘

aut-num:        AS43757
as-name:        ICZAS-CZ
org:            ORG-Ia714-RIPE
remarks:        >> =========== Czech Republic ===========
remarks:        >> O2 Czech Republic
import:         from AS5610 accept ANY
export:         to AS5610 announce {78.31.24.0/21};
remarks:        >> T-Mobile Czech Republic (GTS CZ)
import:         from AS5588 accept ANY
export:         to AS5588 announce {78.31.24.0/21};
remarks:        >> =========== Slovakia =================
remarks:        >> Slovak Telekom
import:         from AS6855 accept ANY
export:         to AS6855 announce {192.108.126.0/24};
remarks:        >> Slovanet
import:         from AS8778 accept ANY
export:         to AS8778 announce {192.108.126.0/24};
remarks:        >> SWAN
import:         from AS5578 accept ANY
export:         to AS5578 announce {192.108.126.0/24};
remarks:        >> ======================================
mp-import:      afi ipv6.unicast from AS5610 accept ANY
mp-export:      afi ipv6.unicast to AS5610 announce AS43757
mp-import:      afi ipv6.unicast from AS5588 accept ANY
mp-export:      afi ipv6.unicast to AS5588 announce AS43757
remarks:        >> ======================================
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         ICZAS-MNT
created:        2007-09-24T13:16:02Z
last-modified:  2025-10-02T08:48:24Z
source:         RIPE
sponsoring-org: ORG-Ra2-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-IA714-RIPE
org-name:       ICZ a.s.
country:        CZ
org-type:       OTHER
address:        Dummy address for ORG-IA714-RIPE
# Email removed, Log into bgp.tools to see whois emails/phone numbers
abuse-c:        ABC-CZ
mnt-ref:        ICZAS-MNT
mnt-by:         ICZAS-MNT
mnt-by:         GTSCZ-MNT
created:        2007-09-19T08:30:38Z
last-modified:  2026-04-29T06:54:58Z
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: 2026-05-06T03:23:50Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-ctiol	219
RIPE	as-gtscz-cust	137
RIPE	as-slovanet	30