Autonomous System details

AS25512

CD-Telematika a.s. · cdt.cz

Czechia

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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	79,228,162,514,264,338,000,000,000,000
ASN type	ISP
Registry	ripe
Allocated	23 years ago on Dec 17, 2002
Updated	9 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	██████████	84
82.202.105.206	██████████	76
89.203.160.25	██████████	59
195.146.100.73	██████████	44
212.11.104.13	██████████	41
195.146.111.115	██████████	40
81.19.42.113	██████████	39
89.203.197.145	██████████	37
89.203.160.24	███████	37
81.19.42.107	██████████	36

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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
AS14840	BR.Digital Telecom
AS15935	ha-vel internet s.r.o.
AS16509	Amazon.com, Inc.
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
AS24940	Hetzner Online GmbH
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
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 27 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
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

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

IP Address	ASN	Details
2001:1a48:5:1::43	AS25512 CD-Telematika a.s.	`0.71ms` from Prague, CZ
212.11.110.1	AS25512 CD-Telematika a.s.	`3.04ms` from Prague, CZ
85.13.75.33	AS25512 CD-Telematika a.s.	`3.68ms` from Prague, CZ
89.203.187.1	AS25512 CD-Telematika a.s.	`3.16ms` from Prague, CZ
85.13.118.57	AS25512 CD-Telematika a.s.	`0.29ms` from Prague, CZ
82.202.80.129	AS25512 CD-Telematika a.s.	`3.00ms` from Prague, CZ
213.235.140.254	AS25512 CD-Telematika a.s.	`3.72ms` from Prague, CZ
89.203.216.1	AS25512 CD-Telematika a.s.	`3.20ms` from Prague, CZ
212.11.116.33	AS25512 CD-Telematika a.s.	`3.04ms` from Prague, CZ
89.203.159.1	AS25512 CD-Telematika a.s.	`3.35ms` from Prague, CZ
195.146.114.113	AS25512 CD-Telematika a.s.	`0.36ms` from Prague, CZ
82.202.79.225	AS25512 CD-Telematika a.s.	`2.98ms` from Prague, CZ
82.202.105.117	AS25512 CD-Telematika a.s.	`0.27ms` from Prague, CZ
82.202.70.81	AS25512 CD-Telematika a.s.	`0.66ms` from Prague, CZ
89.203.222.49	AS25512 CD-Telematika a.s.	`0.26ms` from Prague, CZ
85.13.110.254	AS25512 CD-Telematika a.s.	`4.04ms` from Prague, CZ
81.19.47.241	AS25512 CD-Telematika a.s.	`0.29ms` from Prague, CZ
2001:1a48:2::2	AS25512 CD-Telematika a.s.	`5.95ms` from Prague, CZ
89.203.152.2	AS25512 CD-Telematika a.s.	`4.74ms` from Prague, CZ
213.235.159.1	AS25512 CD-Telematika a.s.	`6.92ms` from Prague, CZ
213.235.157.8	AS25512 CD-Telematika a.s.	`2.09ms` from Prague, CZ
89.203.213.1	AS25512 CD-Telematika a.s.	`3.23ms` from Prague, CZ
85.13.97.18	AS25512 CD-Telematika a.s.	`0.32ms` from Prague, CZ
2001:1a48:20::1	AS25512 CD-Telematika a.s.	`4.21ms` from Prague, CZ
212.11.98.38	AS25512 CD-Telematika a.s.	`1.00ms` 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
123.112.226.56	AS4808 China Unicom Beijing Province Network	`3.53ms` from Beijing, CN
34.222.238.248	AS16509 Amazon.com, Inc.	`0.32ms` from Boardman, US
50.110.61.136	AS5650 Frontier Communications of America, Inc.	`12.20ms` from Chicago, US
84.66.15.152	AS5378 Vodafone Limited	`4.70ms` from London, GB
203.220.206.8	AS7545 TPG Telecom Limited	`1.81ms` from Melbourne, AU
86.217.170.104	AS3215 Orange S.A.	`8.70ms` from Paris, FR
18.208.172.104	AS14618 Amazon.com, Inc.	`0.60ms` from Reston, US
34.232.139.232	AS14618 Amazon.com, Inc.	`0.18ms` from Reston, US
98.160.127.72	AS22773 Cox Communications Inc.	`5.91ms` from Tulsa, US
36.105.173.168	AS4134 CHINANET-BACKBONE	`17.79ms` from UEruemqi, CN
181.127.24.200	AS23201 Telecel S.A.	`9.91ms` from Asuncion, PY
172.176.0.24	AS8075 Microsoft Corporation	`0.27ms` from Boydton, US
70.119.123.120	AS11427 Charter Communications Inc	`5.29ms` from Dallas, US
91.39.128.184	AS3320 Deutsche Telekom AG	`8.16ms` from Frankfurt am Main, DE
125.242.14.216	AS17858 LG POWERCOMM	`1.61ms` from Incheon, KR
218.55.148.56	AS9318 SK Broadband Co Ltd	`2.89ms` from Incheon, KR
79.30.114.184	AS3269 Telecom Italia S.p.A.	`1.80ms` from Milan, IT
115.226.252.24	AS4134 CHINANET-BACKBONE	`8.46ms` from Ningbo, CN
174.54.238.56	AS7922 Comcast Cable Communications, LLC	`17.27ms` from Ashburn, US
154.203.197.8	AS214143 SKYDIGITAL TELECOM LTD	`1.07ms` from Bangkok, TH
184.16.114.8	AS5650 Frontier Communications of America, Inc.	`7.36ms` from Chicago, US
72.178.119.88	AS11427 Charter Communications Inc	`4.83ms` from Dallas, US
96.52.97.72	AS6327 Shaw Communications	`4.18ms` from Edmonton, CA
63.180.212.152	AS16509 Amazon.com, Inc.	`0.16ms` from Frankfurt am Main, DE
184.85.145.88	AS16625 Akamai Technologies, Inc.	`0.41ms` from Helsinki, FI

Traceroute

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

traceroute -a -n -q1 -m5 82.117.150.141

traceroute to 82.117.150.141 (82.117.150.141): 5 hops max, 52 byte packets

1 [AS208450] 45.136.59.1 8.018 ms

2 [AS41371] 88.151.180.149 0.748 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Aktau, KZ

On April 13th 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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