AS number details

AS57728

CEZNET s.r.o.  ·  ceznet.cz

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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
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


                                                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.

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
81.25.29.229 ██████████ 4
188.122.212.121 ████████ 4
188.122.212.40 ██████████ 4

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Useful for Cybersecurity

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
188.122.220.8 AS57728 CEZNET s.r.o. 2.78ms from Prague, CZ
2a00:1800:0:ffff::f1 AS57728 CEZNET s.r.o. 1.80ms from Prague, CZ
81.25.30.65 AS57728 CEZNET s.r.o. 2.49ms from Prague, CZ
188.122.211.137 AS57728 CEZNET s.r.o. 2.77ms from Prague, CZ
188.122.222.153 AS57728 CEZNET s.r.o. 0.34ms from Prague, CZ
188.122.210.129 AS57728 CEZNET s.r.o. 0.35ms from Prague, CZ
109.234.41.57 AS57728 CEZNET s.r.o. 1.81ms from Prague, CZ
81.25.16.0 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
109.234.43.2 AS57728 CEZNET s.r.o. 4.12ms from Prague, CZ
81.25.28.21 AS57728 CEZNET s.r.o. 2.47ms from Prague, CZ
2a00:1807:6:2601::1 AS57728 CEZNET s.r.o. 0.63ms from Prague, CZ
188.122.199.130 AS57728 CEZNET s.r.o. 2.44ms from Prague, CZ
109.234.46.1 AS57728 CEZNET s.r.o. 1.87ms from Prague, CZ
188.122.196.98 AS57728 CEZNET s.r.o. 1.29ms from Prague, CZ
188.122.212.129 AS57728 CEZNET s.r.o. 2.81ms from Prague, CZ
185.255.119.3 AS57728 CEZNET s.r.o. 0.35ms from Prague, CZ
188.122.208.25 AS57728 CEZNET s.r.o. 2.71ms from Prague, CZ
81.25.29.161 AS57728 CEZNET s.r.o. 2.48ms from Prague, CZ
185.255.118.57 AS57728 CEZNET s.r.o. 0.39ms from Prague, CZ
109.234.44.41 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
188.122.202.202 AS57728 CEZNET s.r.o. 2.77ms from Prague, CZ
188.122.193.11 AS57728 CEZNET s.r.o. 5.02ms from Prague, CZ
81.25.20.65 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
2a00:1800:ff0:31::1 AS57728 CEZNET s.r.o. 2.59ms from Prague, CZ
81.25.27.1 AS57728 CEZNET s.r.o. 2.58ms 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
92.97.65.224 AS5384 Emirates Internet 2.77ms from Al Fujairah City, AE
18.64.248.48 AS16509 Amazon.com, Inc. 7.33ms from Atlanta, US
35.221.162.240 AS396982 Google LLC 0.14ms from Chang-hua, TW
179.127.167.240 AS28343 UNIFIQUE TELECOMUNICACOES S/A 7.01ms from Chapeco, BR
157.15.202.64 AS151734 WEBYNE DATA CENTRE PRIVATE LIMITED 1.29ms from Delhi, IN
174.29.201.144 AS209 CenturyLink Communications, LLC 1.85ms from Denver, US
110.19.34.80 AS4837 CHINA UNICOM China169 Backbone 6.00ms from Hohhot, CN
223.122.51.112 AS137872 China Mobile Hong Kong Company Limited 1.81ms from Hong Kong, HK
107.148.63.160 AS398478 PEG TECH INC 0.04ms from Hong Kong, HK
36.78.24.0 AS7713 PT Telekomunikasi Indonesia 6.32ms from Jakarta, ID
188.235.0.160 AS50542 JSC ER-Telecom Holding 8.73ms from Moscow, RU
82.55.84.32 AS3269 Telecom Italia S.p.A. 5.98ms from Naples, IT
83.168.34.48 AS6866 Cyprus Telecommunications Authority 2.18ms from Nicosia, CY
122.223.128.80 AS2519 ARTERIA Networks Corporation 10.36ms from Osaka, JP
114.163.206.0 AS4713 NTT Communications Corporation 1.51ms from Osaka, JP
73.30.253.112 AS7922 Comcast Cable Communications, LLC 9.48ms from Piscataway, US
47.253.226.112 AS45102 Alibaba (US) Technology Co., Ltd. 0.30ms from Ashburn, US
182.60.8.208 AS9829 National Internet Backbone 12.87ms from Bengaluru, IN
34.219.117.48 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
179.253.21.80 AS8167 V tal 6.05ms from Brasilia, BR
49.83.96.80 AS4134 CHINANET-BACKBONE 8.49ms from Huai'an, CN
83.35.19.176 AS3352 TELEFONICA DE ESPANA S.A.U. 13.30ms from Madrid, ES
69.180.91.48 AS7922 Comcast Cable Communications, LLC 11.00ms from Miami, US
79.51.20.208 AS3269 Telecom Italia S.p.A. 2.36ms from Milan, IT
220.91.25.32 AS4766 Korea Telecom 1.99ms 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 -f4 -m12 188.122.217.250
traceroute to 188.122.217.250 (188.122.217.250): 12 hops max, 52 byte packets
4 [AS5578] 62.168.90.137 0.501 ms
5 [AS5578] 62.168.99.154 0.601 ms
6 [] 91.210.16.186 7.002 ms
7 [AS39791] 89.111.69.1 6.307 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Bratislava, SK
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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