AS number 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 169
Number of IPv4 15,360
Number of IPv6 237,684,487,542,793,012,780,631,851,008
ASN type ISP
Registry ripe
Allocated 6 years ago on Oct 21, 2019
Updated a month 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 169 domain names hosted across 67 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
109.234.40.198 ██████████ 11
188.122.212.8 ██████████ 8
81.25.31.235 ██████████ 5
81.25.28.84 ██████████ 5
188.122.192.110 ███████ 4
81.25.29.229 ██████████ 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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Pingable IPs

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

IP Address ASN Details
188.122.212.129 AS57728 CEZNET s.r.o. 2.81ms from Prague, CZ
188.122.209.10 AS57728 CEZNET s.r.o. 2.73ms from Prague, CZ
188.122.200.1 AS57728 CEZNET s.r.o. 3.07ms from Prague, CZ
109.234.40.241 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
188.122.197.1 AS57728 CEZNET s.r.o. 2.73ms from Prague, CZ
188.122.218.1 AS57728 CEZNET s.r.o. 2.75ms from Prague, CZ
188.122.198.65 AS57728 CEZNET s.r.o. 2.67ms from Prague, CZ
81.25.18.217 AS57728 CEZNET s.r.o. 1.81ms from Prague, CZ
188.122.222.153 AS57728 CEZNET s.r.o. 0.34ms from Prague, CZ
109.234.44.41 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
188.122.220.8 AS57728 CEZNET s.r.o. 2.78ms from Prague, CZ
188.122.211.137 AS57728 CEZNET s.r.o. 2.77ms from Prague, CZ
2a00:1800:0:ffff::f1 AS57728 CEZNET s.r.o. 1.80ms from Prague, CZ
188.122.221.2 AS57728 CEZNET s.r.o. 2.79ms from Prague, CZ
81.25.20.65 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
188.122.216.165 AS57728 CEZNET s.r.o. 2.76ms from Prague, CZ
109.234.46.1 AS57728 CEZNET s.r.o. 1.87ms from Prague, CZ
188.122.195.2 AS57728 CEZNET s.r.o. 2.42ms from Prague, CZ
81.25.22.161 AS57728 CEZNET s.r.o. 1.86ms from Prague, CZ
81.25.16.0 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
185.255.116.214 AS57728 CEZNET s.r.o. 0.32ms from Prague, CZ
81.25.28.21 AS57728 CEZNET s.r.o. 2.47ms from Prague, CZ
188.122.210.129 AS57728 CEZNET s.r.o. 0.35ms from Prague, CZ
2a00:1800:1:: AS57728 CEZNET s.r.o. 3.29ms from Prague, CZ
185.255.119.3 AS57728 CEZNET s.r.o. 0.35ms 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
95.114.4.80 AS6805 Telefonica Germany GmbH & Co.OHG 9.32ms from Frankfurt am Main, DE
110.19.34.80 AS4837 CHINA UNICOM China169 Backbone 6.00ms from Hohhot, CN
47.250.96.0 AS45102 Alibaba (US) Technology Co., Ltd. 0.77ms from Kuala Lumpur, MY
185.53.192.208 AS200148 FIDOKA srl SB 11.90ms from Milan, IT
67.87.205.144 AS6128 Cablevision Systems Corp. 8.54ms from New York City, US
79.224.146.224 AS3320 Deutsche Telekom AG 5.34ms from Nuernberg, DE
73.30.253.112 AS7922 Comcast Cable Communications, LLC 9.48ms from Piscataway, US
112.251.117.48 AS4837 CHINA UNICOM China169 Backbone 5.12ms from Qingdao, CN
23.21.99.160 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
54.253.68.48 AS16509 Amazon.com, Inc. 0.14ms from Sydney, AU
218.163.8.224 AS3462 Data Communication Business Group 4.21ms from Taichung, TW
62.90.203.128 AS1680 Cellcom Fixed Line Communication L.P 3.54ms from Tel Aviv, IL
126.65.190.32 AS17676 SoftBank Corp. 2.87ms from Tokyo, JP
47.253.226.112 AS45102 Alibaba (US) Technology Co., Ltd. 0.30ms from Ashburn, US
75.182.35.16 AS11426 Charter Communications Inc 12.66ms from Charlotte, US
129.89.55.80 AS7050 University of Wisconsin - Milwaukee 3.43ms from Chicago, US
18.221.212.112 AS16509 Amazon.com, Inc. 0.10ms from Columbus, US
78.42.9.64 AS3209 Vodafone GmbH 8.60ms from Frankfurt am Main, DE
87.180.247.224 AS3320 Deutsche Telekom AG 3.82ms from Frankfurt am Main, DE
60.17.80.176 AS4837 CHINA UNICOM China169 Backbone 8.38ms from Liaoyang, CN
73.124.251.240 AS7922 Comcast Cable Communications, LLC 4.08ms from Miami, US
79.51.20.208 AS3269 Telecom Italia S.p.A. 2.36ms from Milan, IT
94.41.126.192 AS24955 JSC "Ufanet" 18.88ms from Moscow, RU
54.235.223.16 AS14618 Amazon.com, Inc. 0.24ms from Reston, US
141.223.139.160 AS3784 Pohang University of Science and Technology 6.14ms 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 188.122.201.1
traceroute to 188.122.201.1 (188.122.201.1): 64 hops max, 52 byte packets
3 [AS6204] 103.246.249.33 16.582 ms
4 *
5 [AS39791] 89.111.69.1 24.329 ms
7 [AS57728] 188.122.201.1 19.609 ms
Measurement taken from IPinfo ProbeNet in Nuernberg, DE
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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