AS number 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 1,832
Number of IPv4 117,760
Number of IPv6 79,228,162,514,264,337,593,543,950,336
ASN type Hosting
Registry ripe
Allocated 23 years ago on Dec 17, 2002
Updated 22 days ago on Jul 29, 2025

IP Ranges

Netblock Company Num of IPs
89.203.128.0/17 CD-Telematika a.s. 32,768
213.235.128.0/18 CD-Telematika a.s. 16,384
82.202.64.0/18 CD-Telematika a.s. 16,384
85.13.64.0/18 CD-Telematika a.s. 16,384
195.146.96.0/19 CD-Telematika a.s. 8,192
212.11.96.0/19 CD-Telematika a.s. 8,192
82.117.128.0/19 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 1,832 domain names hosted across 518 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.19.42.5 ██████████ 97
82.202.105.206 ██████████ 97
85.13.80.72 ████████ 44
195.146.100.73 ██████████ 43
89.203.197.145 ██████████ 41
195.146.111.115 ██████████ 41
81.19.42.107 ██████████ 40
81.19.42.113 ██████████ 39
212.11.104.13 ██████████ 35
89.203.205.195 ██████████ 29

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Peers

There are 57 peers for this ASN.

Peers Name
AS1299 Arelion Sweden AB
AS13335 Cloudflare, Inc.
AS14840 BR.Digital Provider
AS16509 Amazon.com, Inc.
AS174 Cogent Communications
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.
AS202297 Skylon Solutions Limited
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.
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.
AS47767 Regionalni centrum Olomouc 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
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
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
AS6461 Zayo Bandwidth
AS6939 Hurricane Electric LLC
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ASN API ASN Database Download

Downstreams

There are 28 downstreams for this ASN.

Downstreams Name
AS1299 Arelion Sweden AB
AS174 Cogent Communications
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.
AS47767 Regionalni centrum Olomouc 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 ASN Database Download

Pingable IPs

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

IP Address ASN Details
85.13.67.1 AS25512 CD-Telematika a.s. 2.08ms from Prague, CZ
89.203.149.1 AS25512 CD-Telematika a.s. 4.75ms from Prague, CZ
82.117.156.254 AS25512 CD-Telematika a.s. 3.70ms from Prague, CZ
213.235.160.23 AS25512 CD-Telematika a.s. 6.79ms from Prague, CZ
85.13.119.185 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
85.13.91.141 AS25512 CD-Telematika a.s. 3.30ms from Prague, CZ
82.202.105.131 AS25512 CD-Telematika a.s. 0.27ms from Prague, CZ
89.203.171.1 AS25512 CD-Telematika a.s. 3.38ms from Prague, CZ
85.13.79.1 AS25512 CD-Telematika a.s. 0.47ms from Prague, CZ
213.235.133.76 AS25512 CD-Telematika a.s. 0.30ms from Prague, CZ
212.11.109.1 AS25512 CD-Telematika a.s. 2.90ms from Prague, CZ
81.19.32.146 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
85.13.84.1 AS25512 CD-Telematika a.s. 3.38ms from Prague, CZ
89.203.221.81 AS25512 CD-Telematika a.s. 0.26ms from Prague, CZ
2001:1a48:1112:9::2 AS25512 CD-Telematika a.s. 0.36ms from Prague, CZ
89.203.230.92 AS25512 CD-Telematika a.s. 0.44ms from Prague, CZ
89.203.159.1 AS25512 CD-Telematika a.s. 3.56ms from Prague, CZ
212.11.96.37 AS25512 CD-Telematika a.s. 1.22ms from Prague, CZ
85.13.127.193 AS25512 CD-Telematika a.s. 0.32ms from Prague, CZ
85.13.69.5 AS25512 CD-Telematika a.s. 3.63ms from Prague, CZ
89.203.129.83 AS25512 CD-Telematika a.s. 0.33ms from Prague, CZ
89.203.150.1 AS25512 CD-Telematika a.s. 4.47ms from Prague, CZ
2001:1a48:5:1::44 AS25512 CD-Telematika a.s. 0.67ms from Prague, CZ
89.203.141.1 AS25512 CD-Telematika a.s. 3.24ms from Prague, CZ
2001:1a48:1a48::c AS25512 CD-Telematika a.s. 0.35ms 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
197.255.126.24 AS37074 University of Ghana 1.41ms from Accra, GH
198.44.168.152 AS62610 Zenlayer Inc 0.38ms from Lima, PE
94.180.80.248 AS43478 JSC ER-Telecom Holding 1.74ms from Novosibirsk, RU
137.184.188.168 AS14061 DigitalOcean, LLC 0.24ms from Santa Clara, US
42.188.123.184 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 5.76ms from Singapore, SG
27.125.151.24 AS55430 Starhub Ltd 2.75ms from Singapore, SG
118.78.164.232 AS4837 CHINA UNICOM China169 Backbone 7.73ms from Taiyuan, CN
64.217.48.88 AS7018 AT&T Enterprises, LLC 3.41ms from Dallas, US
51.198.239.184 AS5607 Sky UK Limited 5.03ms from London, GB
84.234.249.200 AS29695 Altibox AS 9.12ms from Oslo, NO
194.146.67.200 AS198575 Departement de la Manche 6.28ms from Paris, FR
38.51.152.56 AS264111 RedeBr Telecom 6.05ms from Rio de Janeiro, BR
200.158.225.24 AS27699 TELEFÔNICA BRASIL S.A 8.37ms from Sao Paulo, BR
120.142.91.184 AS10036 DLIVE 5.32ms from Seoul, KR
197.5.24.136 AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom) 11.71ms from Tunis, TN
79.170.212.56 AS43957 WNT Telecommunication GmbH 0.21ms from Vienna, AT
79.240.104.184 AS3320 Deutsche Telekom AG 9.50ms from Frankfurt am Main, DE
116.29.148.24 AS4134 CHINANET-BACKBONE 4.65ms from Guangzhou, CN
89.181.4.248 AS2860 NOS COMUNICACOES, S.A. 10.81ms from Lisbon, PT
194.223.43.72 AS7545 TPG Telecom Limited 1.46ms from Melbourne, AU
138.197.113.184 AS14061 DigitalOcean, LLC 0.18ms from New York City, US
132.148.209.168 AS26496 GoDaddy.com, LLC 1.20ms from Phoenix, US
118.84.113.72 AS4134 CHINANET-BACKBONE 3.36ms from Shanghai, CN
101.68.157.56 AS4837 CHINA UNICOM China169 Backbone 5.29ms from Shanghai, CN
115.49.251.152 AS4837 CHINA UNICOM China169 Backbone 5.05ms from Zhengzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -f4 -m11 89.203.229.219
traceroute to 89.203.229.219 (89.203.229.219): 11 hops max, 52 byte packets
4 [] 201.16.2.155 104.6 ms
5 *
6 *
7 [AS25512] 81.19.33.109 200.976 ms
8 [AS25512] 89.203.212.202 199.166 ms
9 *
10 *
11 *
Measurement taken from IPinfo ProbeNet in Campina Grande, BR
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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