View

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
	81.19.32.0/20	CD-Telematika a.s.
	82.117.128.0/19	CD-Telematika a.s.
	82.202.64.0/18	CD-Telematika a.s.
	85.13.64.0/18	CD-Telematika a.s.
	85.184.16.0/20	CD-Telematika a.s.
	89.203.128.0/17	CD-Telematika a.s.
	131.117.192.0/21	CD-Telematika a.s.
	185.134.0.0/22	CD-Telematika a.s.
	195.146.96.0/19	CD-Telematika a.s.
	212.11.96.0/19	CD-Telematika a.s.
	213.235.128.0/18	CD-Telematika a.s.
	2001:1a48::/32	CD-Telematika a.s.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS1299	Arelion (fka. Telia Carrier)	✔	✔
	AS174	Cogent Communications, LLC	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS1299	Arelion (fka. Telia Carrier)	✔	✔
	AS174	Cogent Communications, LLC	✔	✔
	AS216450	Letiste Praha, a. s.	✔	✘
	AS43614	Economia a.s.	✔	✔
	AS6939	Hurricane Electric LLC	✔	✔
	AS51331	SychrovNET s.r.o	✔	✔
	AS56450	Alberon Letohrad s.r.o	✔	✔
	AS20609	KAZA.cz s.r.o.	✔	✔
	AS6461	Zayo Bandwidth	✔	✔
	AS47868	AVONET, s.r.o.	✔	✔
	AS43507	RETE internet, s.r.o.	✔	✘
	AS5405	Inter.link GmbH	✔	✔
	AS51524	Ales Tesacek	✔	✘
	AS200678	Komplet NET s.r.o.	✔	✘
	AS197550	Internet4you.cz, spol. s r.o.	✔	✘
	AS56827	mirnet s.r.o.	✔	✘
	AS3161	IT PROFI s.r.o.	✔	✘
	AS200355	CadcaNet plus s. r. o.	✔	✘
	AS200828	TERMS a.s.	✔	✘
	AS56717	OG Soft s.r.o.	✔	✔
	AS50975	KYOCERA AVX Components s.r.o.	✔	✘
	AS47131	PH, spol. s r. o.	✔	✘
	AS213387	TeSuNet s.r.o.	✔	✘
	AS8218	Zayo Europe	✔	✔
	AS24940	Hetzner Online GmbH	✔	✔
	AS6204	INTERKVM HOST SRL	✔	✔
	AS33891	Core-Backbone GmbH	✔	✔
	AS48417	ITS akciova spolecnost	✔	✔
	AS6881	NIX.CZ z.s.p.o.	✔	✔
	AS51449	Kabelova televize Usti nad Orlici, spol. s r. o.	✔	✔
	AS20708	SKODA AUTO a.s.	✔	✘
	AS14840	BR.DIGITAL	✔	✔
	AS49544	i3D.net B.V	✔	✔
	AS9498	Bharti Airtel Ltd.	✔	✘
	AS1764	Next Layer Telecommunications	✔	✔
	AS24482	SG.GS	✔	✔
	AS4455	IX Reach Ltd	✔	✘
	AS35046	OMEGA plus Chrudim s.r.o.	✔	✔
	AS40994	Alwyzon (Hohl IT)	✔	✔
	AS32590	Valve Corporation	✔	✔
	AS51184	Fonira Telekom GmbH	✔	✔
	AS49121	Infinity Telecom, s.r.o.	✔	✔
	AS50698	TETA s.r.o.	✔	✔
	AS53062	ALT | GRUPO BRASIL TECPAR	✔	✘
	AS21430	WIA spol. s.r.o.	✔	✘
	AS2852	CESNET z.s.p.o.	✔	✘
	AS42473	Anexia Cloud Solutions GmbH	✔	✔
	AS199524	Gcore S.A.	✔	✔
	AS197019	WEDOS Internet, a.s.	✔	✔
	AS36236	NetActuate, Inc	✔	✔
	AS1820	WNET TELECOM USA Corp.	✔	✔
	AS16019	Vodafone Czech Republic a.s.	✔	✘
	AS15169	Google LLC	✔	✔
	AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd	✔	✘
	AS30764	PODA a.s.	✔	✘
	AS6663	Türk Telekom International	✔	✔
	AS22356	Durand do Brasil Ltda	✔	✔
	AS1239	Sprint Wireline (Cogent)	✔	✘
	AS47927	WIFIWEB s.r.l.	✘	✔
	AS21241	Global Payments Europe, s.r.o.	✔	✘

---

Downstreams

	ASN	Description	IPv4	IPv6
	AS216450	Letiste Praha, a. s.	✔	✘
	AS51331	SychrovNET s.r.o	✔	✔
	AS43614	Economia a.s.	✔	✔
	AS56450	Alberon Letohrad s.r.o	✔	✔
	AS20609	KAZA.cz s.r.o.	✔	✔
	AS47868	AVONET, s.r.o.	✔	✔
	AS43507	RETE internet, s.r.o.	✔	✘
	AS197550	Internet4you.cz, spol. s r.o.	✔	✘
	AS200355	CadcaNet plus s. r. o.	✔	✘
	AS56717	OG Soft s.r.o.	✔	✔
	AS200828	TERMS a.s.	✔	✘
	AS213387	TeSuNet s.r.o.	✔	✘
	AS48417	ITS akciova spolecnost	✔	✔
	AS6881	NIX.CZ z.s.p.o.	✔	✔
	AS51449	Kabelova televize Usti nad Orlici, spol. s r. o.	✔	✔
	AS20708	SKODA AUTO a.s.	✔	✘
	AS35046	OMEGA plus Chrudim s.r.o.	✔	✔
	AS197019	WEDOS Internet, a.s.	✔	✔
	AS21241	Global Payments Europe, s.r.o.	✔	✘
	AS200678	Komplet NET s.r.o.	✔	✘
	AS3161	IT PROFI s.r.o.	✔	✘
	AS47131	PH, spol. s r. o.	✔	✘
	AS50975	KYOCERA AVX Components s.r.o.	✔	✘
	AS51524	Ales Tesacek	✔	✘
	AS56827	mirnet s.r.o.	✔	✘

aut-num:        AS25512
as-name:        CDT-AS
descr:          The Czech Republic
org:            ORG-CTa3-RIPE
remarks:        # TRANSIT
import:         from AS1299 accept ANY # TELIA
export:         to AS1299 announce AS-CDT-NETWORKS
import:         from AS174 accept ANY # COGENT
export:         to AS174 announce AS-CDT-NETWORKS
remarks:        # Peering
import:         from AS6881 accept ANY # NIXCZ
export:         to AS6881 announce AS-CDT-NETWORKS
import:         from AS47200 accept ANY # NIX Routeservers
export:         to AS47200 announce ANY
import:         from AS47627 accept ANY # NIXSK Routeservers
export:         to AS47627 announce ANY
remarks:        # CUSTOMERS
import:         from AS6881 accept ANY # NIX
export:         to AS6881 announce ANY
import:         from AS21241 accept ANY # MUZO
export:         to AS21241 announce ANY
import:         from AS34040 accept ANY # TTNET
export:         to AS34040 announce ANY
import:         from AS35046 accept ANY # Omega
export:         to AS35046 announce ANY
import:         from AS43507 accept ANY # RETE
export:         to AS43507 announce ANY
import:         from AS44424 accept ANY # MALL
export:         to AS44424 announce ANY
import:         from AS47767 accept ANY # RCO
export:         to AS47767 announce ANY
import:         from AS47868 accept ANY # SUPRO
export:         to AS47868 announce ANY
import:         from AS48417 accept ANY # ITS
export:         to AS48417 announce ANY
import:         from AS56450 accept ANY # ALBERON
export:         to AS56450 announce ANY
import:         from AS197550 accept ANY # INTERNET4YOU
export:         to AS197550 announce ANY
import:         from AS49101 accept ANY # KTCZ
export:         to AS49101 announce ANY
import:         from AS51524 accept ANY # ATESACEK
export:         to AS51524 announce ANY
import:         from AS56827 accept ANY # MIRNET SRO
export:         to AS56827 announce ANY
import:         from AS198403 accept ANY # MATRIGO
export:         to AS198403 announce ANY
import:         from AS56717 accept ANY # RESAL
export:         to AS56717 announce ANY
import:         from AS197698 accept ANY # D-H-T
export:         to AS197698 announce ANY
import:         from AS47131 accept ANY # PHSPOL
export:         to AS47131 announce ANY
import:         from AS43614 accept ANY # ECONOMIA
export:         to AS43614 announce ANY
import:         from AS56456 accept ANY # C2NET
export:         to AS56456 announce ANY
import:         from AS20708 accept ANY # SKODA AUTO a.s.
export:         to AS20708 announce ANY
import:         from AS62178 accept ANY # MASTER IT
export:         to AS62178 announce ANY
import:         from AS49488 accept ANY # TLD via NIX
export:         to AS49488 announce ANY
import:         from AS60275 accept ANY # RVTECH
export:         to AS60275 announce ANY
import:         from AS3161 accept ANY # IT Profi Vimperk
export:         to AS3161 announce ANY
import:         from AS20609 accept ANY # Kaza
export:         to AS20609 announce ANY
import:         from AS30738 accept ANY # Netart
export:         to AS30738 announce ANY
import:         from AS50975 accept ANY # AVX_AS
export:         to AS50975 announce ANY
import:         from AS62159 accept ANY # HAPPY Technik
export:         to AS62159 announce ANY
import:         from AS197019 accept ANY # Wedos
export:         to AS197019 announce ANY
import:         from AS200155 accept ANY # TCPISEK-CZ
export:         to AS200155 announce ANY
import:         from AS200355 accept ANY # CADCANET
export:         to AS200355 announce ANY
import:         from AS201457 accept ANY # KOOPERATIVA-AS
export:         to AS201457 announce ANY
import:         from AS42908 accept ANY # AS-NORDICTELECOM
export:         to AS42908 announce ANY
import:         from AS213387 accept ANY # TESUNET
export:         to AS213387 announce ANY
import:         from AS206159 accept ANY # Fresh Data
export:         to AS206159 announce ANY
remarks:        End of list
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CDT-MNT
created:        2002-12-17T14:28:40Z
last-modified:  2025-07-29T11:30:12Z
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-CTa3-RIPE
org-name:       CD-Telematika a.s.
country:        CZ
org-type:       LIR
address:        Dummy address for ORG-CTa3-RIPE
# Email removed, Log into bgp.tools to see whois emails
abuse-c:        CDT-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        CDT-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         CDT-MNT
created:        2004-04-17T11:04:09Z
last-modified:  2025-09-02T12:06:21Z
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: 2025-12-26T03:24:20Z UTC

---

Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-43413_nt-nix	69
RIPE	as-cdt-fenix	10
RIPE	as8251:as-nix-peerings	49
RIPE	as24971:as-mai-nix-peer	87813
RIPE	as-cesnet-nix-peers	90434
RIPE	as-to2-nix-peer	63
LEVEL3	as-sprint-origins	7309
RIPE	as42000:as-nixcz-peerings	80
RIPE	as-cdt-networks	87