Autonomous System details

AS57728

CEZNET s.r.o.  ·  ceznet.cz

Czechia

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AS57728 – CEZNET s.r.o.

Field Value
Country Czechia
Website ceznet.cz
Hosted domains 200
IPv4 addresses 15,360
IPv6 addresses 237,684,487,542,793,012,780,631,851,008
ASN type ISP
Registry ripe
Allocated 6 years ago on Oct 21, 2019
Updated 5 months ago on Sep 26, 2025

IP Ranges

Netblock Company Num of IPs
188.122.192.0/19 Magnalink, a.s. 8,192
81.25.16.0/21 CER 2,048
81.25.24.0/21 CER 2,048
109.234.40.0/21 CER 2,048
185.255.116.0/22 CEZNET s.r.o. 1,024
Netblock Company
2a00:1800::/32 CEZNET s.r.o.
2a00:1807::/32 CER
2a0a:b6c0::/32 Magnalink, a.s.
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WHOIS Details

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                                                ASHandle:       AS57728
                                                OrgID:          AS57728
                                                ASName:         AS57728
                                                ASNumber:       AS57728
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 200 domain names hosted across 67 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.25.31.235 ██████████ 29
81.25.16.230 █████████ 19
188.122.202.244 ██████████ 18
188.122.212.135 ██████████ 13
109.234.40.198 ███████ 11
188.122.212.8 ██████████ 8
81.25.27.204 ██████████ 5
81.25.28.84 ██████████ 5
188.122.212.40 ████████ 4
188.122.212.121 ███████ 4

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Peers

There is 1 peer for this ASN.

Peers Name
AS39791 Telco Pro Services, a. s.
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Upstreams

There is 1 peer for this ASN.

upstreams Name
AS39791 Telco Pro Services, a. s.
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Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

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

IP Address ASN Details
2a00:1800:1:2:: AS57728 CEZNET s.r.o. 4.98ms from Prague, CZ
81.25.17.9 AS57728 CEZNET s.r.o. 1.91ms from Prague, CZ
81.25.30.65 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
81.25.22.161 AS57728 CEZNET s.r.o. 1.90ms from Prague, CZ
188.122.197.197 AS57728 CEZNET s.r.o. 4.10ms from Prague, CZ
109.234.47.246 AS57728 CEZNET s.r.o. 1.83ms from Prague, CZ
2a00:1807:6:2601::1 AS57728 CEZNET s.r.o. 0.71ms from Prague, CZ
188.122.208.208 AS57728 CEZNET s.r.o. 4.07ms from Prague, CZ
2a0a:b6c0:0:8::1 AS57728 CEZNET s.r.o. 4.10ms from Prague, CZ
81.25.28.254 AS57728 CEZNET s.r.o. 2.52ms from Prague, CZ
2a00:1807:7:2707::1 AS57728 CEZNET s.r.o. 0.70ms from Prague, CZ
2a00:1800:ff2:2::1 AS57728 CEZNET s.r.o. 3.09ms from Prague, CZ
188.122.201.164 AS57728 CEZNET s.r.o. 4.18ms from Prague, CZ
188.122.216.165 AS57728 CEZNET s.r.o. 4.11ms from Prague, CZ
188.122.218.1 AS57728 CEZNET s.r.o. 4.17ms from Prague, CZ
188.122.214.1 AS57728 CEZNET s.r.o. 4.17ms from Prague, CZ
188.122.212.1 AS57728 CEZNET s.r.o. 4.16ms from Prague, CZ
109.234.43.1 AS57728 CEZNET s.r.o. 4.19ms from Prague, CZ
81.25.18.137 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
81.25.29.161 AS57728 CEZNET s.r.o. 2.57ms from Prague, CZ
2a00:1807:1:1511::1 AS57728 CEZNET s.r.o. 0.41ms from Prague, CZ
81.25.26.147 AS57728 CEZNET s.r.o. 2.69ms from Prague, CZ
109.234.45.33 AS57728 CEZNET s.r.o. 1.99ms from Prague, CZ
81.25.27.1 AS57728 CEZNET s.r.o. 2.64ms from Prague, CZ
188.122.210.129 AS57728 CEZNET s.r.o. 3.54ms 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
1.122.20.0 AS1221 Telstra Limited 4.30ms from Adelaide, AU
80.140.21.32 AS3320 Deutsche Telekom AG 2.78ms from Berlin, DE
98.28.60.192 AS10796 Charter Communications Inc 8.87ms from Columbus, US
91.44.224.144 AS3320 Deutsche Telekom AG 7.39ms from Frankfurt am Main, DE
182.183.161.112 AS17557 Pakistan Telecommunication Company Limited 19.00ms from Karachi, PK
116.55.180.112 AS4134 CHINANET-BACKBONE 7.49ms from Kunming, CN
86.1.162.144 AS5089 Virgin Media Limited 3.54ms from London, GB
193.91.44.0 AS15965 CEGECOM S.A. 0.76ms from Luxembourg, LU
84.121.6.192 AS6739 VODAFONE ONO, S.A. 10.05ms from Madrid, ES
95.106.177.80 AS12389 PJSC Rostelecom 11.32ms from Moscow, RU
170.0.3.240 AS264957 Coopercitrus Cooperativa de Produtores Rurais 9.21ms from Osasco, BR
14.39.81.64 AS4766 Korea Telecom 1.24ms from Seoul, KR
92.241.155.0 AS21107 # BLIC.NET AS peering info 6.89ms from Sisak, HR
220.135.11.32 AS3462 Data Communication Business Group 1.66ms from Taichung, TW
79.224.146.224 AS3320 Deutsche Telekom AG 6.29ms from Frankfurt am Main, DE
77.0.86.80 AS6805 Telefonica Germany GmbH & Co.OHG 2.08ms from Hamburg, DE
148.71.221.128 AS12353 Vodafone Portugal 6.93ms from Lisbon, PT
76.108.5.144 AS7922 Comcast Cable Communications, LLC 5.42ms from Miami, US
37.49.193.64 AS21127 Joint Stock Company TransTeleCom 4.53ms from Novosibirsk, RU
187.17.250.224 AS28201 Companhia Itabirana Telecomunicações Ltda 7.86ms from Osasco, BR
112.237.68.96 AS4837 CHINA UNICOM China169 Backbone 8.54ms from Qingdao, CN
187.234.11.96 AS8151 UNINET 4.59ms from Santiago de Queretaro, MX
35.247.69.112 AS396982 Google LLC 0.15ms from The Dalles, US
125.198.37.128 AS2518 BIGLOBE Inc. 5.34ms from Tokyo, JP
172.8.48.0 AS7018 AT&T Enterprises, LLC 5.87ms from Chicago, US

Traceroute

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

$
traceroute -a -n -q1 -f2 109.234.43.1
traceroute to 109.234.43.1 (109.234.43.1): 64 hops max, 52 byte packets
2 [] 91.210.16.186 1.035 ms
3 [AS39791] 89.111.69.1 3.219 ms
5 [AS57728] 109.234.43.1 4.239 ms
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 AS57728 at robtex.

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