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 1,867
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 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 1,867 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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Hosted Domains API & Database

Peers

There are 54 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
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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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.
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 & Database

Pingable IPs

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

IP Address ASN Details
82.202.120.139 AS25512 CD-Telematika a.s. 0.92ms from Prague, CZ
82.202.88.229 AS25512 CD-Telematika a.s. 2.46ms from Prague, CZ
2001:1a48:d:1:e68d:8cff:fe02:fa8 AS25512 CD-Telematika a.s. 3.96ms from Prague, CZ
85.13.73.1 AS25512 CD-Telematika a.s. 3.68ms from Prague, CZ
195.146.101.239 AS25512 CD-Telematika a.s. 0.32ms from Prague, CZ
82.117.137.81 AS25512 CD-Telematika a.s. 0.35ms from Prague, CZ
195.146.123.1 AS25512 CD-Telematika a.s. 0.53ms from Prague, CZ
212.11.115.13 AS25512 CD-Telematika a.s. 2.48ms from Prague, CZ
89.203.223.21 AS25512 CD-Telematika a.s. 2.03ms from Prague, CZ
213.235.129.2 AS25512 CD-Telematika a.s. 0.90ms from Prague, CZ
213.235.183.137 AS25512 CD-Telematika a.s. 0.69ms from Prague, CZ
89.203.160.11 AS25512 CD-Telematika a.s. 3.13ms from Prague, CZ
89.203.149.1 AS25512 CD-Telematika a.s. 4.74ms from Prague, CZ
89.203.159.1 AS25512 CD-Telematika a.s. 3.53ms from Prague, CZ
85.13.81.112 AS25512 CD-Telematika a.s. 2.96ms from Prague, CZ
89.203.128.239 AS25512 CD-Telematika a.s. 2.30ms from Prague, CZ
82.202.123.5 AS25512 CD-Telematika a.s. 4.38ms from Prague, CZ
89.203.185.184 AS25512 CD-Telematika a.s. 5.21ms from Prague, CZ
89.203.206.1 AS25512 CD-Telematika a.s. 3.19ms from Prague, CZ
89.203.204.2 AS25512 CD-Telematika a.s. 0.54ms from Prague, CZ
212.11.127.89 AS25512 CD-Telematika a.s. 0.98ms from Prague, CZ
213.235.178.69 AS25512 CD-Telematika a.s. 8.48ms from Prague, CZ
82.117.130.93 AS25512 CD-Telematika a.s. 0.31ms from Prague, CZ
85.13.85.1 AS25512 CD-Telematika a.s. 2.54ms from Prague, CZ
213.235.156.97 AS25512 CD-Telematika a.s. 0.38ms 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
20.86.19.232 AS8075 Microsoft Corporation 1.20ms from Amsterdam, NL
73.128.0.136 AS7922 Comcast Cable Communications, LLC 4.48ms from Ashburn, US
70.22.228.232 AS701 Verizon Business 2.50ms from Boston, US
84.193.159.216 AS6848 Telenet BV 7.25ms from Brussels, BE
154.178.34.136 AS8452 TE-AS 3.80ms from Cairo, EG
154.124.147.152 AS8346 SONATEL-AS Autonomous System 2.18ms from Dakar, SN
183.131.38.40 AS136188 NINGBO, ZHEJIANG Province, P.R.China. 7.27ms from Hangzhou, CN
45.122.255.120 AS45903 CMC Telecom Infrastructure Company 1.22ms from Ho Chi Minh City, VN
39.33.161.184 AS17557 Pakistan Telecommunication Company Limited 18.19ms from Islamabad, PK
78.151.143.120 AS13285 TalkTalk Communications Limited 3.58ms from London, GB
140.91.201.40 AS31898 Oracle Corporation 0.42ms from London, GB
92.234.219.152 AS5089 Virgin Media Limited 13.76ms from London, GB
5.65.154.168 AS5607 Sky UK Limited 5.86ms from London, GB
85.210.154.168 AS8075 Microsoft Corporation 0.17ms from London, GB
172.247.183.120 AS40065 CNSERVERS LLC 0.20ms from Los Angeles, US
37.99.158.8 AS47794 Etihad Atheeb Telecom Company 10.82ms from Manama, BH
186.53.195.8 AS6057 Administracion Nacional de Telecomunicaciones 1.60ms from Montevideo, UY
23.226.71.232 AS53755 Input Output Flood LLC 0.55ms from Phoenix, US
73.25.1.88 AS7922 Comcast Cable Communications, LLC 7.46ms from Portland, US
52.87.229.24 AS14618 Amazon.com, Inc. 0.38ms from Reston, US
50.46.117.104 AS20055 Wholesail networks LLC 4.28ms from Seattle, US
211.173.137.136 AS18310 SK Broadband Co Ltd 6.51ms from Seoul, KR
222.97.181.232 AS4766 Korea Telecom 6.55ms from Seoul, KR
218.212.151.136 AS55430 Starhub Ltd 2.08ms from Singapore, SG
118.86.30.248 AS4721 JCOM Co., Ltd. 15.32ms from Tokyo, JP

Traceroute

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

$
traceroute -a -n -q1 -f3 89.203.139.55
traceroute to 89.203.139.55 (89.203.139.55): 64 hops max, 52 byte packets
3 [] 91.210.16.101 0.525 ms
4 *
5 *
Measurement taken from IPinfo ProbeNet in Prague, 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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