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 1,868
Number of IPv4 117,760
Number of IPv6 79,228,162,514,264,337,593,543,950,336
ASN type ISP
Registry ripe
Allocated 23 years ago on Dec 17, 2002
Updated 3 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 1,868 domain names hosted across 527 IP addresses on this ASN.

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

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Peers

There are 55 peers for this ASN.

Peers Name
AS1299 Arelion Sweden AB
AS13335 Cloudflare, Inc.
AS14840 BR.Digital Provider
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.
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
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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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 ASN Database Download

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.
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.
AS6461 Zayo Bandwidth
AS6881 NIX.CZ z.s.p.o.
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ASN API ASN Database Download

Pingable IPs

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

IP Address ASN Details
82.202.80.177 AS25512 CD-Telematika a.s. 2.47ms from Prague, CZ
81.19.39.66 AS25512 CD-Telematika a.s. 0.32ms from Prague, CZ
89.203.230.92 AS25512 CD-Telematika a.s. 0.44ms from Prague, CZ
89.203.207.1 AS25512 CD-Telematika a.s. 3.25ms from Prague, CZ
82.202.105.112 AS25512 CD-Telematika a.s. 0.27ms from Prague, CZ
195.146.111.116 AS25512 CD-Telematika a.s. 1.38ms from Prague, CZ
85.13.111.206 AS25512 CD-Telematika a.s. 4.04ms from Prague, CZ
85.13.80.11 AS25512 CD-Telematika a.s. 0.33ms from Prague, CZ
82.202.102.2 AS25512 CD-Telematika a.s. 3.35ms from Prague, CZ
89.203.198.109 AS25512 CD-Telematika a.s. 0.52ms from Prague, CZ
89.203.249.1 AS25512 CD-Telematika a.s. 0.43ms from Prague, CZ
89.203.197.1 AS25512 CD-Telematika a.s. 3.23ms from Prague, CZ
85.13.90.185 AS25512 CD-Telematika a.s. 2.63ms from Prague, CZ
89.203.170.1 AS25512 CD-Telematika a.s. 3.44ms from Prague, CZ
82.202.116.129 AS25512 CD-Telematika a.s. 1.72ms from Prague, CZ
82.202.117.241 AS25512 CD-Telematika a.s. 7.40ms from Prague, CZ
82.117.151.97 AS25512 CD-Telematika a.s. 0.79ms from Prague, CZ
85.13.96.61 AS25512 CD-Telematika a.s. 0.26ms from Prague, CZ
89.203.137.145 AS25512 CD-Telematika a.s. 0.64ms from Prague, CZ
82.117.152.252 AS25512 CD-Telematika a.s. 3.87ms from Prague, CZ
89.203.250.62 AS25512 CD-Telematika a.s. 0.47ms from Prague, CZ
195.146.104.106 AS25512 CD-Telematika a.s. 0.24ms from Ceske Budejovice, CZ
89.203.185.184 AS25512 CD-Telematika a.s. 5.21ms from Prague, CZ
89.203.159.1 AS25512 CD-Telematika a.s. 3.49ms from Prague, CZ
89.203.199.62 AS25512 CD-Telematika a.s. 0.51ms 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
20.242.122.248 AS8075 Microsoft Corporation 0.39ms from Boydton, US
128.198.139.152 AS396425 University of Colorado, Colorado Springs 1.61ms from Denver, US
87.148.228.24 AS3320 Deutsche Telekom AG 4.12ms from Duesseldorf, DE
43.216.154.24 AS16509 Amazon.com, Inc. 0.88ms from Kuala Lumpur, MY
204.246.162.120 AS16509 Amazon.com, Inc. 1.47ms from Las Vegas, US
18.175.221.248 AS16509 Amazon.com, Inc. 0.17ms from London, GB
23.203.178.168 AS16625 Akamai Technologies, Inc. 0.90ms from New York City, US
114.154.79.120 AS4713 NTT Communications Corporation 2.85ms from Osaka, JP
59.86.248.184 AS17839 LG HelloVision Corp. 2.06ms from Seoul, KR
43.206.18.200 AS16509 Amazon.com, Inc. 0.19ms from Tokyo, JP
78.29.47.88 AS8369 Intersvyaz-2 JSC 3.47ms from Yekaterinburg, RU
2.191.131.168 AS58224 Iran Telecommunication Company PJS 15.08ms from Yerevan, AM
39.98.84.56 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.61ms from Zhangjiakou, CN
168.194.75.40 AS264764 Innova Outsourcing S.A 0.40ms from Guatemala City, GT
38.238.248.248 AS134548 DXTL Tseung Kwan O Service 0.73ms from Hong Kong, HK
82.33.199.168 AS5089 Virgin Media Limited 11.49ms from London, GB
3.96.165.168 AS16509 Amazon.com, Inc. 0.11ms from Montreal, CA
15.207.239.136 AS16509 Amazon.com, Inc. 0.12ms from Mumbai, IN
113.153.129.72 AS2516 KDDI CORPORATION 7.84ms from Osaka, JP
138.2.33.184 AS31898 Oracle Corporation 0.16ms from Osaka, JP
54.233.101.104 AS16509 Amazon.com, Inc. 0.18ms from Osasco, BR
213.245.47.152 AS15557 Societe Francaise Du Radiotelephone - SFR SA 7.69ms from Paris, FR
76.115.236.40 AS7922 Comcast Cable Communications, LLC 5.54ms from Portland, US
112.239.16.120 AS4837 CHINA UNICOM China169 Backbone 7.71ms from Qingdao, CN
174.110.42.216 AS11426 Charter Communications Inc 10.87ms from Atlanta, US

Traceroute

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

$
traceroute -a -n -q1 -f5 -m10 195.146.120.145
traceroute to 195.146.120.145 (195.146.120.145): 10 hops max, 52 byte packets
5 [AS6939] 184.105.213.14 110.978 ms
6 *
7 [AS25512] 81.19.33.73 117.701 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Lagos, NG
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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