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 Hosting
Registry ripe
Allocated 23 years ago on Dec 17, 2002
Updated 8 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 1,957 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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Peers

There are 54 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
AS21241 Global Payments Europe, s.r.o.
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.
AS4455 IX Reach Ltd
AS47131 PH, spol. s r. o.
AS47868 AS SUPRO-NET
AS48417 ITS akciova spolecnost
AS49544 i3D.net B.V
AS50833 FIBER TELECOM s.r.o.
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 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.
AS21241 Global Payments Europe, s.r.o.
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

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

IP Address ASN Details
89.203.227.1 AS25512 CD-Telematika a.s. 4.47ms from Prague, CZ
89.203.250.12 AS25512 CD-Telematika a.s. 0.44ms from Prague, CZ
195.146.114.113 AS25512 CD-Telematika a.s. 0.36ms from Prague, CZ
85.13.70.3 AS25512 CD-Telematika a.s. 2.78ms from Prague, CZ
89.203.130.6 AS25512 CD-Telematika a.s. 3.92ms from Prague, CZ
89.203.215.1 AS25512 CD-Telematika a.s. 3.20ms from Prague, CZ
89.203.159.1 AS25512 CD-Telematika a.s. 3.41ms from Prague, CZ
2001:1a48:18::2 AS25512 CD-Telematika a.s. 4.20ms from Prague, CZ
82.202.122.193 AS25512 CD-Telematika a.s. 4.20ms from Prague, CZ
212.11.98.38 AS25512 CD-Telematika a.s. 1.06ms from Prague, CZ
89.203.214.1 AS25512 CD-Telematika a.s. 3.25ms from Prague, CZ
213.235.141.254 AS25512 CD-Telematika a.s. 3.65ms from Prague, CZ
82.202.115.193 AS25512 CD-Telematika a.s. 1.97ms from Prague, CZ
89.203.179.129 AS25512 CD-Telematika a.s. 5.86ms from Prague, CZ
212.11.115.13 AS25512 CD-Telematika a.s. 2.51ms from Prague, CZ
89.203.137.17 AS25512 CD-Telematika a.s. 0.63ms from Prague, CZ
82.202.86.17 AS25512 CD-Telematika a.s. 2.46ms from Prague, CZ
89.203.206.1 AS25512 CD-Telematika a.s. 3.11ms from Prague, CZ
89.203.145.125 AS25512 CD-Telematika a.s. 6.12ms from Prague, CZ
213.235.178.33 AS25512 CD-Telematika a.s. 7.26ms from Prague, CZ
89.203.239.21 AS25512 CD-Telematika a.s. 4.31ms from Prague, CZ
82.117.148.189 AS25512 CD-Telematika a.s. 0.59ms from Prague, CZ
82.117.140.3 AS25512 CD-Telematika a.s. 0.60ms from Prague, CZ
212.11.96.3 AS25512 CD-Telematika a.s. 1.07ms from Prague, CZ
213.235.191.1 AS25512 CD-Telematika a.s. 3.23ms 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
82.170.88.152 AS1136 KPN B.V. 2.47ms from Amsterdam, NL
83.198.197.24 AS3215 Orange S.A. 18.69ms from Antananarivo, MG
24.145.115.168 AS11776 Breezeline 9.95ms from Ashburn, US
73.128.0.136 AS7922 Comcast Cable Communications, LLC 4.41ms from Ashburn, US
96.4.2.120 AS11686 Zayo Bandwidth 5.66ms from Atlanta, US
179.14.220.24 AS27831 Colombia Móvil 10.90ms from Bogota, CO
34.57.213.88 AS396982 Google LLC 0.11ms from Council Bluffs, US
136.119.138.24 AS396982 Google LLC 0.11ms from Council Bluffs, US
66.25.81.120 AS11427 Charter Communications Inc 9.66ms from Dallas, US
60.48.182.232 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 2.30ms from Kuala Lumpur, MY
88.7.202.40 AS3352 TELEFONICA DE ESPANA S.A.U. 5.07ms from Madrid, ES
65.240.225.232 AS701 Verizon Business 3.33ms from Miami, US
107.3.221.216 AS7922 Comcast Cable Communications, LLC 11.74ms from Murfreesboro, US
3.228.123.168 AS14618 Amazon.com, Inc. 0.15ms from Reston, US
190.22.244.216 AS7418 TELEFÓNICA CHILE S.A. 2.27ms from Santiago, CL
122.35.161.184 AS17858 LG POWERCOMM 4.14ms from Seoul, KR
1.33.60.248 AS2514 NTT PC Communications, Inc. 3.38ms from Tokyo, JP
80.211.156.200 AS31034 Aruba S.p.A. 0.33ms from Arezzo, IT
59.29.114.40 AS4766 Korea Telecom 5.30ms from Incheon, KR
5.76.190.56 AS9198 JSC Kazakhtelecom 4.74ms from Karagandy, KZ
4.187.200.216 AS8075 Microsoft Corporation 0.13ms from Lohogaon, IN
6.2.4.120 AS668 United States Department of Defense (DoD) 1.67ms from Los Angeles, US
112.31.61.88 AS9808 China Mobile Communications Group Co., Ltd. 11.47ms from Nanjing, CN
194.132.58.8 AS209454 The North Alliance Sverige AB 0.95ms from Stockholm, SE
194.179.135.104 AS57630 84 Grams AB 0.15ms from Stockholm, SE

Traceroute

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

$
traceroute -a -n -q1 -f3 81.19.36.1
traceroute to 81.19.36.1 (81.19.36.1): 64 hops max, 52 byte packets
4 [AS8966] 195.229.3.199 110.249 ms
5 *
6 [AS174] 154.54.76.209 117.624 ms
7 [AS174] 154.54.62.122 123.116 ms
8 [AS174] 154.54.72.166 130.558 ms
9 [AS174] 154.54.72.169 130.13 ms
10 [AS174] 154.54.77.137 135.871 ms
11 [AS174] 154.54.77.102 135.456 ms
12 [AS174] 149.6.24.34 129.519 ms
13 [AS25512] 81.19.36.1 129.452 ms
Measurement taken from IPinfo ProbeNet in Al Fujairah City, AE
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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