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 1,856
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 2 months 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 1,856 domain names hosted across 523 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 ██████████ 96
85.13.80.72 ████████ 44
195.146.100.73 ██████████ 43
89.203.197.145 ██████████ 42
195.146.111.115 ██████████ 41
81.19.42.107 ██████████ 40
81.19.42.113 ██████████ 39
212.11.104.13 ███████ 35
89.203.205.195 ██████████ 30

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Peers

There are 54 peers for this ASN.

Peers Name
AS1299 Arelion Sweden AB
AS13335 Cloudflare, Inc.
AS14840 BR.Digital Provider
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.
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
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
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, 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.
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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
81.19.43.18 AS25512 CD-Telematika a.s. 1.47ms from Prague, CZ
82.202.71.37 AS25512 CD-Telematika a.s. 0.63ms from Prague, CZ
82.202.80.29 AS25512 CD-Telematika a.s. 2.46ms from Prague, CZ
213.235.182.1 AS25512 CD-Telematika a.s. 7.14ms from Prague, CZ
89.203.197.1 AS25512 CD-Telematika a.s. 3.23ms from Prague, CZ
2001:1a48:1111:2::3 AS25512 CD-Telematika a.s. 0.36ms from Prague, CZ
213.235.134.6 AS25512 CD-Telematika a.s. 11.68ms from Vienna, AT
89.203.160.22 AS25512 CD-Telematika a.s. 3.10ms from Prague, CZ
89.203.194.1 AS25512 CD-Telematika a.s. 3.22ms from Prague, CZ
2001:1a48:13:411:21e:42ff:fe21:1247 AS25512 CD-Telematika a.s. 4.31ms from Prague, CZ
89.203.193.249 AS25512 CD-Telematika a.s. 0.45ms from Prague, CZ
213.235.145.13 AS25512 CD-Telematika a.s. 5.71ms from Vienna, AT
89.203.222.49 AS25512 CD-Telematika a.s. 0.25ms from Prague, CZ
82.202.90.1 AS25512 CD-Telematika a.s. 0.43ms from Prague, CZ
195.146.111.119 AS25512 CD-Telematika a.s. 1.38ms from Prague, CZ
89.203.152.33 AS25512 CD-Telematika a.s. 4.79ms from Prague, CZ
85.13.85.1 AS25512 CD-Telematika a.s. 2.54ms from Prague, CZ
89.203.172.1 AS25512 CD-Telematika a.s. 3.31ms from Prague, CZ
82.117.151.97 AS25512 CD-Telematika a.s. 0.66ms from Prague, CZ
89.203.220.17 AS25512 CD-Telematika a.s. 0.26ms from Prague, CZ
213.235.140.254 AS25512 CD-Telematika a.s. 3.73ms from Prague, CZ
2001:1a48:1112:9::2 AS25512 CD-Telematika a.s. 0.37ms from Prague, CZ
89.203.206.1 AS25512 CD-Telematika a.s. 3.21ms from Prague, CZ
213.235.176.209 AS25512 CD-Telematika a.s. 0.71ms from Prague, CZ
85.13.106.125 AS25512 CD-Telematika a.s. 0.42ms 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
86.93.195.168 AS1136 KPN B.V. 0.83ms from Amsterdam, NL
73.135.239.200 AS7922 Comcast Cable Communications, LLC 6.07ms from Ashburn, US
210.18.236.88 AS9738 Brennan IT 0.20ms from Brisbane, AU
14.174.200.24 AS45899 VNPT Corp 2.58ms from Da Nang, VN
115.72.144.216 AS7552 Viettel Group 3.55ms from Ho Chi Minh City, VN
3.96.165.168 AS16509 Amazon.com, Inc. 0.12ms from Montreal, CA
68.175.140.184 AS11351 Charter Communications Inc 17.39ms from Piscataway, US
75.101.215.136 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
54.234.118.216 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
1.235.28.168 AS9318 SK Broadband Co Ltd 1.74ms from Seoul, KR
139.168.48.152 AS1221 Telstra Limited 14.72ms from Sydney, AU
73.117.4.8 AS7922 Comcast Cable Communications, LLC 11.79ms from Ashburn, US
121.121.87.248 AS9534 Binariang Berhad 3.01ms from Kuala Lumpur, MY
76.101.187.88 AS7922 Comcast Cable Communications, LLC 7.55ms from Miami, US
72.89.168.248 AS701 Verizon Business 2.82ms from New York City, US
118.153.105.136 AS2516 KDDI CORPORATION 7.30ms from Osaka, JP
78.194.72.248 AS12322 Free SAS 6.38ms from Paris, FR
172.69.48.88 AS13335 Cloudflare, Inc. 0.13ms from Pittsburgh, US
124.49.154.40 AS17858 LG POWERCOMM 2.73ms from Seoul, KR
188.239.61.184 AS136907 HUAWEI CLOUDS 1.00ms from Singapore, SG
171.81.51.104 AS4134 CHINANET-BACKBONE 6.13ms from Wuhan, CN
105.101.112.24 AS36947 Telecom Algeria 10.96ms from Algiers, DZ
72.179.58.168 AS11427 Charter Communications Inc 12.52ms from Dallas, US
77.6.65.24 AS6805 Telefonica Germany GmbH & Co.OHG 1.19ms from Hamburg, DE
217.43.6.56 AS2856 British Telecommunications PLC 4.43ms from London, GB

Traceroute

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

$
traceroute -a -n -q1 -f4 -m7 85.184.29.92
traceroute to 85.184.29.92 (85.184.29.92): 7 hops max, 52 byte packets
4 [AS6939] 184.104.193.78 13.544 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Columbus, US
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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