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 181
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 3 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 181 domain names hosted across 68 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.25.16.230 ████████ 20
188.122.202.244 ██████████ 18
188.122.212.135 ████████ 13
81.25.31.235 ██████████ 12
109.234.40.198 ███████ 11
188.122.212.8 ██████████ 8
81.25.28.84 ██████████ 5
81.25.29.229 ████████ 4
188.122.192.110 █████████ 4
188.122.212.40 ██████████ 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

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

IP Address ASN Details
81.25.20.9 AS57728 CEZNET s.r.o. 1.82ms from Prague, CZ
188.122.214.1 AS57728 CEZNET s.r.o. 4.32ms from Prague, CZ
188.122.218.1 AS57728 CEZNET s.r.o. 4.37ms from Prague, CZ
81.25.22.1 AS57728 CEZNET s.r.o. 1.86ms from Prague, CZ
2a0a:b6c0:8000::1 AS57728 CEZNET s.r.o. 4.32ms from Prague, CZ
188.122.200.1 AS57728 CEZNET s.r.o. 6.28ms from Prague, CZ
81.25.19.73 AS57728 CEZNET s.r.o. 1.81ms from Prague, CZ
188.122.220.1 AS57728 CEZNET s.r.o. 4.33ms from Prague, CZ
188.122.208.24 AS57728 CEZNET s.r.o. 4.27ms from Prague, CZ
185.255.118.57 AS57728 CEZNET s.r.o. 0.39ms from Prague, CZ
188.122.197.197 AS57728 CEZNET s.r.o. 4.29ms from Prague, CZ
188.122.212.1 AS57728 CEZNET s.r.o. 4.37ms from Prague, CZ
188.122.196.98 AS57728 CEZNET s.r.o. 4.21ms from Prague, CZ
188.122.216.165 AS57728 CEZNET s.r.o. 4.28ms from Prague, CZ
109.234.46.1 AS57728 CEZNET s.r.o. 1.86ms from Prague, CZ
2a00:1807:6::1 AS57728 CEZNET s.r.o. 0.66ms from Prague, CZ
2a00:1807:1:2004::2 AS57728 CEZNET s.r.o. 0.37ms from Prague, CZ
109.234.47.246 AS57728 CEZNET s.r.o. 1.75ms from Prague, CZ
81.25.29.161 AS57728 CEZNET s.r.o. 2.46ms from Prague, CZ
188.122.192.57 AS57728 CEZNET s.r.o. 4.30ms from Prague, CZ
109.234.41.57 AS57728 CEZNET s.r.o. 1.83ms from Prague, CZ
81.25.25.30 AS57728 CEZNET s.r.o. 3.19ms from Prague, CZ
81.25.26.33 AS57728 CEZNET s.r.o. 2.61ms from Prague, CZ
188.122.215.1 AS57728 CEZNET s.r.o. 4.31ms from Prague, CZ
109.234.45.17 AS57728 CEZNET s.r.o. 1.91ms 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
73.207.19.144 AS7922 Comcast Cable Communications, LLC 4.29ms from Atlanta, US
134.102.102.0 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 12.71ms from Berlin, DE
189.163.84.32 AS8151 UNINET 1.02ms from Guadalajara, MX
43.199.178.208 AS16509 Amazon.com, Inc. 0.13ms from Hong Kong, HK
205.147.18.48 AS208172 Proton AG 0.69ms from Istanbul, TR
182.45.255.16 AS4134 CHINANET-BACKBONE 4.74ms from Jinan, CN
63.197.205.48 AS7018 AT&T Enterprises, LLC 4.16ms from Los Angeles, US
137.101.195.80 AS12430 VODAFONE ESPANA S.A.U. 7.79ms from Madrid, ES
109.60.191.128 AS47241 Joint Stock Company TransTeleCom 6.10ms from Moscow, RU
115.209.159.160 AS4134 CHINANET-BACKBONE 18.25ms from Nanjing, CN
24.228.87.64 AS6128 Cablevision Systems Corp. 2.27ms from New York City, US
83.200.201.144 AS3215 Orange S.A. 9.53ms from Paris, FR
88.87.82.96 AS39435 JSC "ER-Telecom Holding" 10.79ms from Samara, RU
46.212.47.128 AS25400 Telia Norge AS 2.15ms from Sandefjord, NO
123.55.139.96 AS4134 CHINANET-BACKBONE 10.00ms from Wuhan, CN
185.247.138.48 AS60721 Bursabil Teknoloji A.S. 0.19ms from Bursa, TR
71.68.74.0 AS11426 Charter Communications Inc 8.55ms from Charlotte, US
34.9.49.16 AS396982 Google LLC 0.12ms from Council Bluffs, US
34.174.230.240 AS396982 Google LLC 0.11ms from Dallas, US
37.209.53.144 AS3209 Vodafone GmbH 7.87ms from Frankfurt am Main, DE
212.30.241.160 AS44515 Advania Island ehf 0.46ms from Hafnarfjoerdur, IS
66.136.111.160 AS7018 AT&T Enterprises, LLC 8.09ms from Houston, US
219.122.242.80 AS17511 OPTAGE Inc. 1.59ms from Osaka, JP
112.225.249.192 AS4837 CHINA UNICOM China169 Backbone 1.51ms from Qingdao, CN
222.108.187.16 AS4766 Korea Telecom 1.25ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f3 188.122.222.45
traceroute to 188.122.222.45 (188.122.222.45): 64 hops max, 52 byte packets
4 [AS39791] 89.111.64.25 1.841 ms
6 *
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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