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If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	37.221.88.0/24	Aricoma Systems a.s.
	37.221.88.0/22	Cloud4com s.r.o.
	37.221.89.0/24	Aricoma Systems a.s.
	37.221.90.0/24	Aricoma Systems a.s.
	37.221.91.0/24	Aricoma Systems a.s.
	185.65.92.0/22	Cloud4com s.r.o.
	185.65.92.0/24	DataSpring CZ DCs
	185.65.93.0/24	DataSpring CZ DCs
	185.65.94.0/24	DataSpring CZ DCs
	185.65.95.0/24	DataSpring CZ DCs
	185.78.100.0/22	Cloud4com s.r.o.
	185.78.100.0/24	DataSpring CZ DCs
	185.78.101.0/24	DataSpring CZ DCs
	185.78.102.0/24	DataSpring CZ DCs
	185.78.103.0/24	DataSpring CZ DCs
	185.138.244.0/22	Cloud4com s.r.o.
	185.138.244.0/24	DataSpring CZ DCs
	185.138.245.0/24	DataSpring CZ Microsoft Azure Stack pools
	185.138.246.0/24	DataSpring CZ DCs
	185.138.247.0/24	Cloud4com s.r.o.
	185.146.148.0/22	Cloud4com s.r.o.
	185.146.148.0/24	DataSpring CZ DCs
	185.146.149.0/24	Cloud4com s.r.o.
	185.146.150.0/24	Cloud4com s.r.o.
	185.146.151.0/24	Cloud4com s.r.o.
	194.169.252.0/24	Cloud4com s.r.o.
	2a03:1aa0::/32	Cloud4com s.r.o.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS16019	Vodafone Czech Republic a.s.	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS16019	Vodafone Czech Republic a.s.	✔	✔
	AS6939	Hurricane Electric LLC	✔	✔
	AS6204	INTERKVM HOST SRL	✔	✔
	AS8218	Zayo Europe	✔	✔
	AS24940	Hetzner Online GmbH	✔	✔
	AS49544	i3D.net B.V	✔	✔
	AS1764	Next Layer Telecommunications	✔	✔
	AS49121	Infinity Telecom, s.r.o.	✔	✔
	AS32590	Valve Corporation	✔	✔
	AS40994	Alwyzon (Hohl IT)	✔	✔
	AS50698	TETA s.r.o.	✔	✔
	AS51184	Fonira Telekom GmbH	✔	✔
	AS34170	Aztelekom LLC	✔	✔
	AS199524	Gcore S.A.	✔	✔
	AS6663	Türk Telekom International	✔	✔
	AS21430	WIA spol. s.r.o.	✔	✘
	AS2852	CESNET z.s.p.o.	✔	✘
	AS8801	Rocket Fibre Ltd	✔	✔
	AS24482	SG.GS	✔	✔
	AS42473	Anexia Cloud Solutions GmbH	✔	✔
	AS36236	NetActuate, Inc	✔	✔
	AS4455	IX Reach Ltd	✔	✘
	AS22356	Durand do Brasil Ltda	✘	✔
	AS14840	BR.DIGITAL	✘	✔
	AS47927	WIFIWEB s.r.l.	✘	✔
	AS1820	WNET TELECOM USA Corp.	✘	✔
	AS263444	Open X Tecnologia Ltda	✘	✔

aut-num:        AS201730
as-name:        DataSpring
org:            ORG-CS814-RIPE
remarks:        DataSpring CZ AS
remarks:        For routing please contact ripe-tech@dataspring.cz
remarks:        General policy for boundary filtering:
remarks:        AFI IPv4: accept 0.0.0.0/0 le 24
remarks:        AFI IPv6: accept ::/0 le 48
import:         from AS199803 accept ANY # Comsource
export:         to AS199803 announce AS-CZ-DS # Comsource
import:         from AS6881 accept ANY # NIX.CZ
import:         from AS6939 accept ANY # Hurricane Electric
import:         from AS47200 accept ANY # NIX.CZ route servers
export:         to AS6881 announce AS-CZ-DS # NIX.CZ
export:         to AS6939 announce AS-CZ-DS # Hurricane Electric
export:         to AS47200 announce AS-CZ-DS # NIX.CZ route servers
export:         to AS5610 announce AS-CZ-DS # O2-CZECH-REPUBLIC
import:         from AS5610 accept ANY # O2-CZECH-REPUBLIC
export:         to AS26415 announce AS-CZ-DS # VERISIGN-AS
import:         from AS26415 accept ANY # VERISIGN-AS
export:         to AS8075 announce AS-CZ-DS # Microsoft
import:         from AS8075 accept ANY # Microsoft
export:         to AS16509 announce AS-CZ-DS # Amazon
import:         from AS16509 accept ANY # Amazon
export:         to AS6855 announce AS-CZ-DS # TMCZ (SLOVAK TELEKOM)
import:         from AS6855 accept ANY # TMCZ (SLOVAK TELEKOM)
import:         from AS16019 accept ANY # Vodafone CZ
export:         to AS16019 announce AS-CZ-DS # Vodafone CZ
import:         from AS20804 accept ANY # EXATEL
export:         to AS20804 announce AS-CZ-DS # EXATEL
import:         from AS32787 accept ANY # Akamai_Prolexic
export:         to AS32787 announce AS-CZ-DS # Akamai_Prolexic
import:         from AS49544 accept ANY # i3D.net
export:         to AS49544 announce AS-CZ-DS # i3D.net
remarks:        CUSTOMERS
import:         from AS44424 accept AS44424 # MALL
export:         to AS44424 announce ANY # MALL
import:         from AS197376 accept AS197376 # TEST-TRANSIT-IPV6PROJECT.EU
export:         to AS197376 announce ANY # TEST-TRANSIT-IPV6PROJECT.EU
import:         from AS215582 accept AS215582 # IPV6PROJECT.EU
export:         to AS215582 announce ANY # IPV6PROJECT.EU
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
notify:         support@cloud4com.com
status:         ASSIGNED
notify:         ripe-notify@dataspring.cz
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CLOUD4COM-ROOT-MNT
mnt-by:         MNT-ICT
created:        2014-07-31T15:44:07Z
last-modified:  2024-03-13T09:56:22Z
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:        ****************************


organisation:   ORG-CS814-RIPE
org-name:       Cloud4com s.r.o.
country:        CZ
org-type:       LIR
address:        Dummy address for ORG-CS814-RIPE
# Email removed, Log into bgp.tools to see whois emails
abuse-c:        AR74237-RIPE
mnt-ref:        CLOUD4COM-ROOT-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CLOUD4COM-ROOT-MNT
created:        2024-02-20T09:10:34Z
last-modified:  2024-11-26T09:08:42Z
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: 2026-03-11T03:24:09Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-ctiol	218
RIPE	as-exatel-pl	1358
RIPE	as-cz-ds	2
RIPE	as-transcz	796
RIPE	as201730:as-cz-ds	4