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 1,948
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 6 months ago on Jul 29, 2025

IP Ranges

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 1,948 domain names hosted across 534 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 ██████████ 94
89.203.160.25 ██████████ 45
89.203.197.145 ██████████ 44
85.13.80.72 ██████████ 43
195.146.100.73 ██████████ 43
81.19.42.107 ██████████ 42
195.146.111.115 ██████████ 41
81.19.42.113 ██████████ 40
212.11.104.13 ██████████ 36

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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
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.
AS51184 Fonira Telekom GmbH
AS51331 SychrovNET s.r.o
AS51449 Kabelova televize Usti nad Orlici, spol. s r. o.
AS51524 Ales Tesacek
AS53062 ALT | GRUPO BRASIL TECPAR
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
AS9498 BHARTI Airtel Ltd.
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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.
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.
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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
89.203.213.1 AS25512 CD-Telematika a.s. 3.26ms from Prague, CZ
89.203.169.254 AS25512 CD-Telematika a.s. 3.72ms from Prague, CZ
85.13.85.1 AS25512 CD-Telematika a.s. 2.57ms from Prague, CZ
89.203.131.5 AS25512 CD-Telematika a.s. 4.04ms from Prague, CZ
82.117.134.1 AS25512 CD-Telematika a.s. 2.88ms from Prague, CZ
85.13.107.10 AS25512 CD-Telematika a.s. 0.44ms from Prague, CZ
213.235.142.254 AS25512 CD-Telematika a.s. 3.84ms from Prague, CZ
213.235.134.6 AS25512 CD-Telematika a.s. 7.02ms from Prague, CZ
81.19.32.145 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
85.13.69.1 AS25512 CD-Telematika a.s. 3.62ms from Prague, CZ
85.13.66.129 AS25512 CD-Telematika a.s. 0.32ms from Prague, CZ
85.13.118.131 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
212.11.114.225 AS25512 CD-Telematika a.s. 2.47ms from Prague, CZ
85.13.117.114 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
89.203.249.11 AS25512 CD-Telematika a.s. 0.45ms from Prague, CZ
195.146.114.113 AS25512 CD-Telematika a.s. 0.36ms from Prague, CZ
85.13.71.1 AS25512 CD-Telematika a.s. 2.15ms from Prague, CZ
89.203.236.145 AS25512 CD-Telematika a.s. 0.23ms from Prague, CZ
89.203.179.129 AS25512 CD-Telematika a.s. 5.88ms from Prague, CZ
2001:1a48:ffff::2e2 AS25512 CD-Telematika a.s. 0.23ms from Ceske Budejovice, CZ
195.146.103.1 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
85.13.84.89 AS25512 CD-Telematika a.s. 3.30ms from Prague, CZ
89.203.168.97 AS25512 CD-Telematika a.s. 4.32ms from Prague, CZ
82.202.122.193 AS25512 CD-Telematika a.s. 4.22ms from Prague, CZ
2001:1a48:2a:ffff::1 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
84.225.249.24 AS8448 CETIN Hungary Zrt. 1.09ms from Budapest, HU
162.213.224.8 AS46598 Southern Ohio Communication Services 4.22ms from Columbus, US
136.116.7.168 AS396982 Google LLC 0.11ms from Council Bluffs, US
47.242.65.8 AS45102 Alibaba (US) Technology Co., Ltd. 0.58ms from Hong Kong, HK
18.130.218.136 AS16509 Amazon.com, Inc. 0.18ms from London, GB
101.140.6.120 AS17511 OPTAGE Inc. 3.51ms from Osaka, JP
82.150.169.136 AS16246 O2 Czech Republic, a.s. 3.97ms from Prague, CZ
118.59.107.8 AS4766 Korea Telecom 4.85ms from Seoul, KR
209.126.116.136 AS30083 velia.net 0.16ms from St. Louis, US
20.86.19.232 AS8075 Microsoft Corporation 1.24ms from Amsterdam, NL
157.187.224.24 AS668 United States Department of Defense (DoD) 2.67ms from Ashburn, US
124.176.24.248 AS1221 Telstra Limited 9.28ms from Brisbane, AU
23.61.7.56 AS5432 Proximus NV 0.47ms from Brussels, BE
34.55.100.88 AS396982 Google LLC 0.11ms from Council Bluffs, US
24.127.192.104 AS7922 Comcast Cable Communications, LLC 8.04ms from Flint, US
91.2.30.104 AS3320 Deutsche Telekom AG 6.12ms from Frankfurt am Main, DE
121.33.115.248 AS4134 CHINANET-BACKBONE 3.31ms from Guangzhou, CN
47.98.54.8 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 5.19ms from Hangzhou, CN
14.234.35.104 AS45899 VNPT Corp 3.22ms from Ho Chi Minh City, VN
86.185.159.72 AS2856 British Telecommunications PLC 2.98ms from London, GB
5.48.209.200 AS5410 Bouygues Telecom SA 7.67ms from Marseille, FR
80.22.142.88 AS3269 Telecom Italia S.p.A. 4.56ms from Milan, IT
95.115.91.56 AS6805 Telefonica Germany GmbH & Co.OHG 15.77ms from Nuernberg, DE
69.124.199.200 AS6128 Cablevision Systems Corp. 9.06ms from Piscataway, US
83.11.217.136 AS5617 Orange Polska Spolka Akcyjna 7.79ms from Poznan, PL

Traceroute

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

$
traceroute -a -n -q1 -f2 -m13 89.203.235.23
traceroute to 89.203.235.23 (89.203.235.23): 13 hops max, 52 byte packets
5 *
6 *
7 *
8 [] 91.210.16.101 5.31 ms
9 [AS25512] 81.19.34.25 5.369 ms
10 [AS25512] 89.203.212.18 9.737 ms
11 *
12 *
13 *
Measurement taken from IPinfo ProbeNet in Brno, CZ
On

Related Networks

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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