Autonomous System details

AS25512

CD-Telematika a.s. · cdt.cz

Czechia

BitTorrent

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AS25512 – CD-Telematika a.s.

Field	Value
Country	Czechia
Website	cdt.cz
Hosted domains	1,898
IPv4 addresses	117,760
IPv6 addresses	79,228,162,514,264,337,593,543,950,336
ASN type	ISP
Registry	ripe
Allocated	23 years ago on Dec 17, 2002
Updated	4 months ago on Jul 29, 2025

Netblock	Company	Num of IPs
89.203.128.0/17	CD-Telematika a.s.	32,768
82.202.64.0/18	CD-Telematika a.s.	16,384
85.13.64.0/18	CD-Telematika a.s.	16,384
213.235.128.0/18	CD-Telematika a.s.	16,384
82.117.128.0/19	CD-Telematika a.s.	8,192
195.146.96.0/19	CD-Telematika a.s.	8,192
212.11.96.0/19	CD-Telematika a.s.	8,192
81.19.32.0/20	CD-Telematika a.s.	4,096
85.184.16.0/20	CD-Telematika a.s.	4,096
131.117.192.0/21	CD-Telematika a.s.	2,048
185.134.0.0/22	CD-Telematika a.s.	1,024
85.209.124.0/23	FIBER CONNECTIONS s.r.o.	512
91.234.162.0/23	Jiri Pondelicek	512

Netblock	Company
2001:1a48::/32	CD-Telematika a.s.

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WHOIS Details

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                                                ASHandle:       AS25512
                                                OrgID:          AS25512
                                                ASName:         AS25512
                                                ASNumber:       AS25512
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 1,898 domain names hosted across 529 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
81.19.42.5	██████████	96
82.202.105.206	██████████	95
85.13.80.72	██████████	44
195.146.100.73	██████████	43
89.203.197.145	██████████	42
81.19.42.107	██████████	41
195.146.111.115	██████████	41
81.19.42.113	██████████	40
212.11.104.13	██████████	35
89.203.205.195	██████████	30

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Hosted Domains API & Database

Peers

There are 55 peers for this ASN.

Peers	Name
AS1299	Arelion Sweden AB
AS13335	Cloudflare, Inc.
AS14840	BR.Digital Telecom
AS16509	Amazon.com, Inc.
AS174	Cogent Communications, LLC
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS197019	WEDOS Internet, a.s.
AS197550	Internet4you.cz, spol. s r.o.
AS198150	SIACOM JSC
AS200355	CadcaNet plus s. r. o.
AS200678	Komplet NET s.r.o.
AS200828	TERMS a.s.
AS20609	KAZA.cz s.r.o.
AS20708	SKODA AUTO a.s.
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS213387	TeSuNet s.r.o.
AS216450	Letiste Praha, a. s.
AS22356	Durand do Brasil Ltda
AS24482	SG.GS
AS29504	Freenet Liberec, z.s.
AS3161	IT PROFI s.r.o.
AS32590	Valve Corporation
AS33891	Core-Backbone GmbH
AS35046	OMEGA plus Chrudim s.r.o.
AS36236	NetActuate, Inc
AS39120	Convergenze S.p.A.
AS40994	Hohl IT e.U.
AS43507	RETE internet, s.r.o.
AS43614	Economia a.s.
AS43733	Viva Armenia CJSC
AS44306	OMONIA d.o.o.
AS4455	IX Reach Ltd
AS47131	PH, spol. s r. o.
AS47868	AS SUPRO-NET
AS48417	ITS akciova spolecnost
AS49544	i3D.net B.V
AS50975	KYOCERA AVX Components s.r.o.
AS51185	MainStreaming SpA
AS51331	SychrovNET s.r.o
AS51449	Kabelova televize Usti nad Orlici, spol. s r. o.
AS51524	Ales Tesacek
AS53062	ALT \| GRUPO BRASIL TECPAR
AS5405	Inter.link GmbH
AS54113	Fastly, Inc.
AS56450	Alberon Letohrad s.r.o
AS56717	OG Soft s.r.o.
AS56827	mirnet s.r.o.
AS57463	NetIX Communications JSC
AS6204	INTERKVM HOST SRL
AS6461	Zayo Bandwidth
AS6663	Euroweb Romania S.R.L.
AS6881	NIX.CZ z.s.p.o.
AS6939	Hurricane Electric LLC
AS8218	Zayo Infrastructure France SA

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ASN API & Database

Upstreams

There are 4 upstreams for this ASN.

upstreams	Name
AS1299	Arelion Sweden AB
AS174	Cogent Communications, LLC
AS6461	Zayo Bandwidth
AS6939	Hurricane Electric LLC

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ASN API & Database

Downstreams

There are 26 downstreams for this ASN.

Downstreams	Name
AS1299	Arelion Sweden AB
AS174	Cogent Communications, LLC
AS197550	Internet4you.cz, spol. s r.o.
AS200355	CadcaNet plus s. r. o.
AS200678	Komplet NET s.r.o.
AS200828	TERMS a.s.
AS20609	KAZA.cz s.r.o.
AS20708	SKODA AUTO a.s.
AS213387	TeSuNet s.r.o.
AS216450	Letiste Praha, a. s.
AS3161	IT PROFI s.r.o.
AS35046	OMEGA plus Chrudim s.r.o.
AS43507	RETE internet, s.r.o.
AS43614	Economia a.s.
AS47131	PH, spol. s r. o.
AS47868	AS SUPRO-NET
AS48417	ITS akciova spolecnost
AS50975	KYOCERA AVX Components s.r.o.
AS51331	SychrovNET s.r.o
AS51449	Kabelova televize Usti nad Orlici, spol. s r. o.
AS51524	Ales Tesacek
AS56450	Alberon Letohrad s.r.o
AS56717	OG Soft s.r.o.
AS56827	mirnet s.r.o.
AS6461	Zayo Bandwidth
AS6881	NIX.CZ z.s.p.o.

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ASN API & Database

Pingable IPs

268 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
89.203.194.1	AS25512 CD-Telematika a.s.	`3.20ms` from Prague, CZ
213.235.183.93	AS25512 CD-Telematika a.s.	`0.65ms` from Prague, CZ
81.19.44.97	AS25512 CD-Telematika a.s.	`1.00ms` from Prague, CZ
82.117.159.131	AS25512 CD-Telematika a.s.	`0.36ms` from Prague, CZ
85.13.80.43	AS25512 CD-Telematika a.s.	`0.32ms` from Prague, CZ
89.203.159.1	AS25512 CD-Telematika a.s.	`3.46ms` from Prague, CZ
82.202.123.5	AS25512 CD-Telematika a.s.	`4.32ms` from Prague, CZ
82.202.74.85	AS25512 CD-Telematika a.s.	`2.35ms` from Prague, CZ
89.203.131.5	AS25512 CD-Telematika a.s.	`3.94ms` from Prague, CZ
85.13.70.2	AS25512 CD-Telematika a.s.	`2.78ms` from Prague, CZ
2001:1a48:2a:ffff::1	AS25512 CD-Telematika a.s.	`1.68ms` from Prague, CZ
89.203.230.94	AS25512 CD-Telematika a.s.	`0.42ms` from Prague, CZ
213.235.133.82	AS25512 CD-Telematika a.s.	`0.31ms` from Prague, CZ
82.117.156.254	AS25512 CD-Telematika a.s.	`3.68ms` from Prague, CZ
2001:1a48:8:f000::11	AS25512 CD-Telematika a.s.	`2.19ms` from Prague, CZ
82.117.130.241	AS25512 CD-Telematika a.s.	`0.30ms` from Prague, CZ
89.203.162.12	AS25512 CD-Telematika a.s.	`2.92ms` from Prague, CZ
89.203.168.97	AS25512 CD-Telematika a.s.	`4.29ms` from Prague, CZ
82.202.77.105	AS25512 CD-Telematika a.s.	`2.47ms` from Prague, CZ
82.117.151.97	AS25512 CD-Telematika a.s.	`0.76ms` from Prague, CZ
81.19.39.51	AS25512 CD-Telematika a.s.	`0.28ms` from Prague, CZ
195.146.111.98	AS25512 CD-Telematika a.s.	`1.38ms` from Prague, CZ
213.235.178.69	AS25512 CD-Telematika a.s.	`8.66ms` from Prague, CZ
2001:1a48:ffff::252	AS25512 CD-Telematika a.s.	`0.27ms` from Prague, CZ
82.202.116.129	AS25512 CD-Telematika a.s.	`1.65ms` from Prague, CZ

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
73.128.0.136	AS7922 Comcast Cable Communications, LLC	`4.64ms` from Ashburn, US
80.200.82.40	AS5432 Proximus NV	`2.05ms` from Brussels, BE
82.78.203.24	AS8708 DIGI ROMANIA S.A.	`0.80ms` from Bucharest, RO
122.136.165.24	AS4837 CHINA UNICOM China169 Backbone	`11.14ms` from Changchun, CN
35.226.241.120	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
119.202.228.168	AS4766 Korea Telecom	`6.78ms` from Seoul, KR
114.199.43.216	AS9781 GREEN CABLE TELEVISION STATION	`6.11ms` from Seoul, KR
54.250.7.56	AS16509 Amazon.com, Inc.	`0.22ms` from Tokyo, JP
131.147.25.24	AS2527 Sony Network Communications Inc.	`1.46ms` from Tokyo, JP
77.117.242.216	AS25255 ==> TELE2 AUSTRIA <==	`9.54ms` from Vienna, AT
157.245.102.168	AS14061 DigitalOcean, LLC	`0.32ms` from Bengaluru, IN
35.187.108.72	AS396982 Google LLC	`0.13ms` from Brussels, BE
84.225.249.24	AS8448 CETIN Hungary Zrt.	`1.14ms` from Budapest, HU
75.213.215.104	AS6167 Verizon Business	`16.10ms` from Chicago, US
18.200.228.56	AS16509 Amazon.com, Inc.	`0.16ms` from Dublin, IE
146.198.218.40	AS6871 Plusnet	`1.27ms` from London, GB
116.94.226.216	AS7679 QTnet,Inc.	`8.20ms` from Osaka, JP
116.44.253.104	AS17858 LG POWERCOMM	`2.37ms` from Seoul, KR
122.43.66.216	AS17858 LG POWERCOMM	`7.68ms` from Seoul, KR
124.62.107.104	AS17858 LG POWERCOMM	`8.67ms` from Seoul, KR
119.221.169.88	AS4766 Korea Telecom	`8.47ms` from Seoul, KR
191.248.173.40	AS18881 TELEFÔNICA BRASIL S.A	`10.54ms` from São Paulo, BR
121.30.63.168	AS4837 CHINA UNICOM China169 Backbone	`7.12ms` from Taiyuan, CN
60.95.143.24	AS17676 SoftBank Corp.	`2.75ms` from Tokyo, JP
95.57.95.120	AS9198 JSC Kazakhtelecom	`18.19ms` from Astana, KZ

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -f4 212.11.105.2

traceroute to 212.11.105.2 (212.11.105.2): 64 hops max, 52 byte packets

4 [] 193.178.185.34 27.147 ms

5 *

6 *

7 [AS25512] 81.19.34.29 37.57 ms

8 [AS25512] 195.146.103.154 35.832 ms

9 *

10 [AS25512] 212.11.105.2 37.342 ms

Measurement taken from

IPinfo ProbeNet in Helsinki, FI

On November 28th 2025

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS25512 at robtex.

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