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

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 ██████████ 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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Peers

There are 54 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.
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
82.202.117.241 AS25512 CD-Telematika a.s. 7.39ms from Prague, CZ
82.117.148.254 AS25512 CD-Telematika a.s. 0.59ms from Prague, CZ
85.13.97.18 AS25512 CD-Telematika a.s. 0.32ms from Prague, CZ
82.202.75.225 AS25512 CD-Telematika a.s. 2.99ms from Prague, CZ
89.203.155.155 AS25512 CD-Telematika a.s. 0.87ms from Prague, CZ
81.19.36.129 AS25512 CD-Telematika a.s. 0.36ms from Prague, CZ
89.203.162.12 AS25512 CD-Telematika a.s. 2.87ms from Prague, CZ
89.203.147.1 AS25512 CD-Telematika a.s. 0.53ms from Prague, CZ
82.202.77.105 AS25512 CD-Telematika a.s. 3.00ms from Prague, CZ
82.117.154.201 AS25512 CD-Telematika a.s. 4.38ms from Prague, CZ
85.13.95.101 AS25512 CD-Telematika a.s. 2.60ms from Prague, CZ
85.13.106.120 AS25512 CD-Telematika a.s. 0.42ms from Prague, CZ
89.203.230.94 AS25512 CD-Telematika a.s. 0.41ms from Prague, CZ
85.13.96.61 AS25512 CD-Telematika a.s. 0.23ms from Prague, CZ
2001:1a48:2a:ffff::1 AS25512 CD-Telematika a.s. 1.68ms from Prague, CZ
89.203.191.1 AS25512 CD-Telematika a.s. 3.32ms from Prague, CZ
89.203.207.1 AS25512 CD-Telematika a.s. 3.17ms from Prague, CZ
213.235.141.254 AS25512 CD-Telematika a.s. 3.65ms from Prague, CZ
82.202.65.190 AS25512 CD-Telematika a.s. 0.48ms from Prague, CZ
89.203.247.11 AS25512 CD-Telematika a.s. 5.81ms from Prague, CZ
89.203.192.127 AS25512 CD-Telematika a.s. 0.40ms from Prague, CZ
81.19.47.241 AS25512 CD-Telematika a.s. 0.29ms from Prague, CZ
82.202.102.99 AS25512 CD-Telematika a.s. 3.28ms from Prague, CZ
89.203.144.113 AS25512 CD-Telematika a.s. 5.99ms from Prague, CZ
85.13.105.1 AS25512 CD-Telematika a.s. 1.05ms 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
66.22.29.40 AS25773 RADWARE INC. 0.41ms from Ashburn, US
152.97.84.184 AS21766 BEN LOMAND RURAL TELEPHONE COOPERATIVE, INC. 6.96ms from Atlanta, US
74.221.187.200 AS26827 EPB Fiber Optics 2.90ms from Atlanta, US
66.22.146.88 AS20347 Nvidia Corporation 0.35ms from Chicago, US
177.159.109.152 AS18881 TELEFÔNICA BRASIL S.A 0.62ms from Fortaleza, BR
83.55.125.104 AS3352 TELEFONICA DE ESPANA S.A.U. 6.92ms from Madrid, ES
84.246.224.168 AS34177 CELESTE SAS 6.25ms from Paris, FR
220.78.141.88 AS4766 Korea Telecom 1.75ms from Seoul, KR
102.165.23.152 AS198250 UPSTREAM NETWORK LTD 0.57ms from Amsterdam, NL
111.192.6.88 AS4808 China Unicom Beijing Province Network 4.58ms from Beijing, CN
190.9.96.72 AS271572 DIEGO DEL REI MENEZES-ME 18.74ms from Fortaleza, BR
80.146.117.24 AS3320 Deutsche Telekom AG 4.31ms from Hamburg, DE
1.242.72.152 AS9318 SK Broadband Co Ltd 1.64ms from Incheon, KR
176.37.236.248 AS39608 Lanet Network Ltd 0.46ms from Kyiv, UA
79.165.242.56 AS8615 "Central Telegraph" Public Joint-stock Company 1.47ms from Moscow, RU
72.69.132.184 AS701 Verizon Business 2.73ms from New York City, US
183.131.38.40 AS136188 NINGBO, ZHEJIANG Province, P.R.China. 0.72ms from Ningbo, CN
27.195.4.136 AS4837 CHINA UNICOM China169 Backbone 6.68ms from Qingdao, CN
213.100.175.104 AS1257 Tele2 Sverige AB 12.99ms from Riga, LV
106.251.121.104 AS3786 LG DACOM Corporation 1.93ms from Seoul, KR
178.198.19.72 AS3303 Swisscom (Switzerland) Ltd 1.48ms from Zuerich, CH
47.13.95.72 AS20115 Charter Communications LLC 19.17ms from Atlanta, US
177.255.182.8 AS27831 Colombia Móvil 12.33ms from Bogota, CO
23.15.181.168 AS16625 Akamai Technologies, Inc. 0.10ms from Brussels, BE
34.247.167.24 AS16509 Amazon.com, Inc. 0.46ms from Dublin, IE

Traceroute

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

$
traceroute -a -n -q1 -m12 82.202.89.131
traceroute to 82.202.89.131 (82.202.89.131): 12 hops max, 52 byte packets
2 [AS15169] 192.178.99.18 16.852 ms
3 *
4 [AS25512] 81.19.33.33 16.604 ms
7 [AS39791] 89.111.69.142 22.861 ms
8 [] 91.210.16.101 21.705 ms
9 [AS25512] 81.19.33.33 20.938 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Milan, IT
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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