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	1,957
IPv4 addresses	117,760
IPv6 addresses	79,228,162,514,264,337,593,543,950,336
ASN type	Hosting
Registry	ripe
Allocated	23 years ago on Dec 17, 2002
Updated	7 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

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 1,957 domain names hosted across 544 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
81.19.42.5	██████████	95
82.202.105.206	██████████	94
89.203.160.25	█████████	45
89.203.197.145	██████████	45
195.146.100.73	██████████	43
85.13.80.72	██████████	42
81.19.42.107	██████████	42
195.146.111.115	██████████	41
212.11.104.13	██████████	40
81.19.42.113	██████████	40

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Hosted Domains API & Database

Peers

There are 55 peers for this ASN.

Peers	Name
AS1239	Cogent Communications, LLC
AS1299	Arelion Sweden AB
AS13335	Cloudflare, Inc.
AS14840	BR.Digital Telecom
AS15935	ha-vel internet s.r.o.
AS174	Cogent Communications, LLC
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
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.
AS206159	Fresh Data 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.
AS51184	Fonira Telekom GmbH
AS51331	SychrovNET s.r.o
AS51449	Kabelova televize Usti nad Orlici, spol. s r. o.
AS51524	Ales Tesacek
AS54113	Fastly, Inc.
AS56450	Alberon Letohrad s.r.o
AS56717	OG Soft s.r.o.
AS56827	mirnet s.r.o.
AS57463	NetIX Communications JSC
AS60275	RVTech s.r.o.
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 28 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.
AS206159	Fresh Data 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.
AS60275	RVTech s.r.o.
AS6461	Zayo Bandwidth
AS6881	NIX.CZ z.s.p.o.

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ASN API & Database

Pingable IPs

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

IP Address	ASN	Details
82.202.117.241	AS25512 CD-Telematika a.s.	`7.44ms` from Prague, CZ
212.11.110.1	AS25512 CD-Telematika a.s.	`2.57ms` from Prague, CZ
85.13.85.1	AS25512 CD-Telematika a.s.	`2.55ms` from Prague, CZ
195.146.127.125	AS25512 CD-Telematika a.s.	`0.35ms` from Prague, CZ
212.11.109.1	AS25512 CD-Telematika a.s.	`2.92ms` from Prague, CZ
85.13.76.145	AS25512 CD-Telematika a.s.	`5.14ms` from Prague, CZ
82.202.69.1	AS25512 CD-Telematika a.s.	`0.66ms` from Prague, CZ
195.146.107.169	AS25512 CD-Telematika a.s.	`0.38ms` from Prague, CZ
2001:1a48:a200::1	AS25512 CD-Telematika a.s.	`1.32ms` from Prague, CZ
213.235.133.217	AS25512 CD-Telematika a.s.	`0.36ms` from Prague, CZ
85.13.111.206	AS25512 CD-Telematika a.s.	`4.06ms` from Prague, CZ
82.117.129.45	AS25512 CD-Telematika a.s.	`0.79ms` from Prague, CZ
212.11.116.49	AS25512 CD-Telematika a.s.	`2.50ms` from Prague, CZ
89.203.236.161	AS25512 CD-Telematika a.s.	`0.23ms` from Prague, CZ
82.202.113.1	AS25512 CD-Telematika a.s.	`4.49ms` from Prague, CZ
89.203.190.1	AS25512 CD-Telematika a.s.	`3.31ms` from Prague, CZ
213.235.159.1	AS25512 CD-Telematika a.s.	`6.98ms` from Prague, CZ
85.13.112.66	AS25512 CD-Telematika a.s.	`4.04ms` from Prague, CZ
85.13.117.62	AS25512 CD-Telematika a.s.	`0.30ms` from Prague, CZ
212.11.112.241	AS25512 CD-Telematika a.s.	`2.49ms` from Prague, CZ
85.13.95.101	AS25512 CD-Telematika a.s.	`2.62ms` from Prague, CZ
89.203.179.129	AS25512 CD-Telematika a.s.	`5.88ms` from Prague, CZ
82.202.102.2	AS25512 CD-Telematika a.s.	`3.18ms` from Prague, CZ
89.203.171.1	AS25512 CD-Telematika a.s.	`3.21ms` from Prague, CZ
89.203.206.1	AS25512 CD-Telematika a.s.	`3.10ms` 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
1.158.170.88	AS1221 Telstra Limited	`4.11ms` from Adelaide, AU
190.104.190.88	AS27895 Núcleo S.A.	`5.55ms` from Asuncion, PY
129.204.20.184	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.94ms` from Guangzhou, CN
123.26.132.216	AS45899 VNPT Corp	`2.26ms` from Hanoi, VN
86.138.42.216	AS2856 British Telecommunications PLC	`4.46ms` from London, GB
149.61.49.88	AS23171 Manhattan College	`0.78ms` from New York City, US
142.196.61.168	AS33363 Charter Communications, Inc	`5.60ms` from Orlando, US
115.11.57.184	AS4766 Korea Telecom	`4.62ms` from Seoul, KR
98.238.159.72	AS7922 Comcast Cable Communications, LLC	`6.92ms` from Fremont, US
164.63.208.72	AS57834 Petrol Ofisi A.S.	`4.34ms` from Istanbul, TR
35.243.225.104	AS396982 Google LLC	`0.15ms` from Moncks Corner, US
52.91.103.136	AS14618 Amazon.com, Inc.	`0.43ms` from Reston, US
18.238.187.184	AS16509 Amazon.com, Inc.	`0.18ms` from Santa Clara, US
192.197.232.56	AS3848 WorldLinx Telecommunications, Inc.	`18.20ms` from Seattle, US
172.200.145.40	AS8075 Microsoft Corporation	`0.15ms` from Boydton, US
99.20.79.184	AS7018 AT&T Enterprises, LLC	`3.29ms` from Chicago, US
3.137.138.104	AS16509 Amazon.com, Inc.	`0.99ms` from Columbus, US
23.41.244.104	AS20940 Akamai International B.V.	`0.50ms` from Denver, US
188.106.242.136	AS3209 Vodafone GmbH	`19.01ms` from Duesseldorf, DE
217.80.26.104	AS3320 Deutsche Telekom AG	`8.81ms` from Frankfurt am Main, DE
115.239.127.56	AS4134 CHINANET-BACKBONE	`7.19ms` from Hangzhou, CN
95.145.184.168	AS2856 British Telecommunications PLC	`11.08ms` from London, GB
5.71.220.56	AS5607 Sky UK Limited	`13.05ms` from London, GB
88.18.237.184	AS3352 TELEFONICA DE ESPANA S.A.U.	`12.35ms` from Madrid, ES
94.85.65.8	AS3269 Telecom Italia S.p.A.	`2.08ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -f3 82.202.80.129

traceroute to 82.202.80.129 (82.202.80.129): 64 hops max, 52 byte packets

3 [] 91.210.16.101 0.434 ms

4 [AS25512] 81.19.33.33 0.49 ms

5 [AS25512] 89.203.212.110 2.49 ms

6 [AS25512] 82.202.80.129 2.5 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On February 16th 2026

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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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