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	Prefix	Description
	193.239.0.0/23	Alef Nula a.s.
	193.239.0.0/22	Alef Nula a.s.
	193.239.1.0/24	Alef Nula a.s.
	193.239.2.0/23	Alef Nula a.s.
	2001:67c:21d0::/48	Alef Nula a.s.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

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

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Peers

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

aut-num:        AS35096
as-name:        ALEFNULA
import:         from AS12767 accept ANY
import:         from AS2819 accept ANY
import:         from AS5588 accept ANY
import:         from AS5610 accept ANY
export:         to AS12767 announce AS35096
export:         to AS2819 announce AS35096
export:         to AS5588 announce AS35096
export:         to AS5610 announce AS35096
org:            ORG-ANa3-RIPE
default:        to AS12767
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
notify:         martin.bisko@alef.com
notify:         petr.vacha@alef.com
mnt-by:         ALEFCZ-MNT
created:        2005-06-02T13:07:44Z
last-modified:  2019-12-04T11:18:51Z
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-ANa3-RIPE
org-name:       Alef Nula a.s.
country:        CZ
org-type:       OTHER
address:        Dummy address for ORG-ANa3-RIPE
e-mail:         unread@ripe.net
abuse-c:        AR30127-RIPE
mnt-ref:        ALEFCZ-MNT
mnt-by:         ALEFCZ-MNT
created:        2005-05-23T14:13:09Z
last-modified:  2022-12-01T16:15:39Z
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: 2025-04-17T03:25:03Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-gtscz-cust	134
LEVEL3	as-level3-origins-eu	0
RIPE	as-ctiol	214
LEVEL3	as-level3-origins-na	0
RIPE	as-pragonet	22