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 186
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 4 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 186 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
81.25.31.235 ██████████ 15
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
81.25.29.229 ██████████ 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

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

IP Address ASN Details
188.122.220.1 AS57728 CEZNET s.r.o. 4.16ms from Prague, CZ
188.122.198.49 AS57728 CEZNET s.r.o. 4.12ms from Prague, CZ
188.122.213.1 AS57728 CEZNET s.r.o. 4.11ms from Prague, CZ
188.122.192.233 AS57728 CEZNET s.r.o. 4.11ms from Prague, CZ
81.25.20.145 AS57728 CEZNET s.r.o. 1.87ms from Prague, CZ
109.234.44.41 AS57728 CEZNET s.r.o. 1.90ms from Prague, CZ
188.122.214.1 AS57728 CEZNET s.r.o. 4.11ms from Prague, CZ
188.122.202.202 AS57728 CEZNET s.r.o. 4.16ms from Prague, CZ
81.25.25.30 AS57728 CEZNET s.r.o. 3.23ms from Prague, CZ
81.25.26.147 AS57728 CEZNET s.r.o. 2.61ms from Prague, CZ
81.25.22.161 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
188.122.219.1 AS57728 CEZNET s.r.o. 4.35ms from Prague, CZ
185.255.119.3 AS57728 CEZNET s.r.o. 0.35ms from Prague, CZ
2a00:1807:7:2706::1 AS57728 CEZNET s.r.o. 0.59ms from Prague, CZ
188.122.215.1 AS57728 CEZNET s.r.o. 4.11ms from Prague, CZ
188.122.208.11 AS57728 CEZNET s.r.o. 4.07ms from Prague, CZ
109.234.40.145 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
188.122.221.1 AS57728 CEZNET s.r.o. 4.16ms from Prague, CZ
188.122.211.233 AS57728 CEZNET s.r.o. 4.06ms from Prague, CZ
2a00:1800:1:: AS57728 CEZNET s.r.o. 5.00ms from Prague, CZ
81.25.29.161 AS57728 CEZNET s.r.o. 2.53ms from Prague, CZ
188.122.193.1 AS57728 CEZNET s.r.o. 8.19ms from Prague, CZ
188.122.195.3 AS57728 CEZNET s.r.o. 5.55ms from Prague, CZ
81.25.17.105 AS57728 CEZNET s.r.o. 1.88ms from Prague, CZ
188.122.196.137 AS57728 CEZNET s.r.o. 4.11ms 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
103.136.201.128 AS138692 Polly IT 0.73ms from Dhaka, BD
91.137.49.96 AS199284 Thueringer Netkom GmbH 7.54ms from Frankfurt am Main, DE
70.117.253.128 AS11427 Charter Communications Inc 13.36ms from Houston, US
88.3.23.224 AS3352 TELEFONICA DE ESPANA S.A.U. 1.75ms from Madrid, ES
73.5.169.16 AS7922 Comcast Cable Communications, LLC 4.83ms from Minneapolis, US
182.89.45.192 AS4837 CHINA UNICOM China169 Backbone 4.64ms from Nanning, CN
202.157.238.16 AS9354 Community Network Center Inc. 4.05ms from Osaka, JP
115.28.167.128 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.20ms from Qingdao, CN
14.9.105.0 AS2516 KDDI CORPORATION 10.25ms from Tokyo, JP
153.161.9.80 AS4713 NTT DOCOMO BUSINESS,Inc. 3.33ms from Tokyo, JP
206.172.230.160 AS577 Bell Canada 1.80ms from Toronto, CA
1.196.216.160 AS4134 CHINANET-BACKBONE 11.33ms from Zhengzhou, CN
181.93.26.128 AS7303 Telecom Argentina S.A. 1.93ms from Buenos Aires, AR
117.207.29.80 AS9829 National Internet Backbone 9.80ms from Delhi, IN
35.32.31.80 AS27274 Central Michigan University 2.77ms from Grand Rapids, US
45.49.84.240 AS20001 Charter Communications Inc 4.22ms from Los Angeles, US
93.179.100.96 AS25820 IT7 Networks Inc 0.26ms from Los Angeles, US
87.29.232.0 AS3269 Telecom Italia S.p.A. 4.73ms from Milan, IT
98.14.129.32 AS12271 Charter Communications Inc 2.96ms from New York City, US
100.27.143.48 AS14618 Amazon.com, Inc. 0.20ms from Reston, US
43.200.40.0 AS16509 Amazon.com, Inc. 0.15ms from Seoul, KR
121.5.183.64 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.80ms from Shanghai, CN
83.176.212.192 AS1257 Tele2 Sverige AB 16.24ms from Vilnius, LT
178.129.152.224 AS28812 PJSC "Bashinformsvyaz" 9.23ms from Yekaterinburg, RU
185.247.138.48 AS60721 Bursabil Teknoloji A.S. 0.20ms from Bursa, TR

Traceroute

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

$
traceroute -a -n -q1 -f3 -m8 109.234.42.135
traceroute to 109.234.42.135 (109.234.42.135): 8 hops max, 52 byte packets
4 [AS39791] 89.111.69.1 0.388 ms
6 *
7 *
8 *
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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