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 237,684,487,542,793,014,000,000,000,000
ASN type ISP
Registry ripe
Allocated 6 years ago on Oct 21, 2019
Updated 7 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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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

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

IP Address ASN Details
188.122.223.228 AS57728 CEZNET s.r.o. 5.61ms from Prague, CZ
109.234.41.57 AS57728 CEZNET s.r.o. 1.88ms from Prague, CZ
2a00:1800:0:ffff::f3 AS57728 CEZNET s.r.o. 2.52ms from Prague, CZ
81.25.17.33 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
2a00:1807:1:1504::1 AS57728 CEZNET s.r.o. 0.41ms from Prague, CZ
188.122.222.25 AS57728 CEZNET s.r.o. 0.51ms from Prague, CZ
81.25.31.17 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
2a00:1807:6:2608::1 AS57728 CEZNET s.r.o. 0.67ms from Prague, CZ
109.234.40.177 AS57728 CEZNET s.r.o. 1.93ms from Prague, CZ
188.122.200.1 AS57728 CEZNET s.r.o. 3.27ms from Prague, CZ
81.25.25.30 AS57728 CEZNET s.r.o. 3.28ms from Prague, CZ
81.25.20.9 AS57728 CEZNET s.r.o. 1.91ms from Prague, CZ
188.122.201.164 AS57728 CEZNET s.r.o. 2.96ms from Prague, CZ
81.25.19.73 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
81.25.16.195 AS57728 CEZNET s.r.o. 1.90ms from Prague, CZ
188.122.210.129 AS57728 CEZNET s.r.o. 0.51ms from Prague, CZ
188.122.211.249 AS57728 CEZNET s.r.o. 2.84ms from Prague, CZ
188.122.219.1 AS57728 CEZNET s.r.o. 4.24ms from Prague, CZ
188.122.202.202 AS57728 CEZNET s.r.o. 3.08ms from Prague, CZ
109.234.45.57 AS57728 CEZNET s.r.o. 2.00ms from Prague, CZ
81.25.28.21 AS57728 CEZNET s.r.o. 2.53ms from Prague, CZ
109.234.47.241 AS57728 CEZNET s.r.o. 1.82ms from Prague, CZ
185.255.119.2 AS57728 CEZNET s.r.o. 0.39ms from Prague, CZ
188.122.193.129 AS57728 CEZNET s.r.o. 5.23ms from Prague, CZ
2a00:1800:1021::1 AS57728 CEZNET s.r.o. 3.81ms 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
94.71.181.32 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.62ms from Athens, GR
174.109.34.16 AS11426 Charter Communications Inc 10.27ms from Charlotte, US
183.0.184.96 AS4134 CHINANET-BACKBONE 7.79ms from Guangzhou, CN
212.56.109.16 AS6871 Plusnet 2.65ms from London, GB
119.95.12.32 AS9299 Philippine Long Distance Telephone Company 9.55ms from Manila, PH
16.51.77.224 AS16509 Amazon.com, Inc. 0.66ms from Melbourne, AU
69.138.140.16 AS7922 Comcast Cable Communications, LLC 4.27ms from Miami, US
35.237.168.128 AS396982 Google LLC 0.13ms from Moncks Corner, US
69.138.61.240 AS7922 Comcast Cable Communications, LLC 7.67ms from Murfreesboro, US
120.50.97.176 AS10175 Kumho Cable 9.63ms from Seoul, KR
175.195.99.64 AS4766 Korea Telecom 1.42ms from Seoul, KR
40.141.189.128 AS7029 Windstream Communications LLC 9.57ms from Chicago, US
42.121.96.224 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 4.73ms from Hangzhou, CN
4.250.19.0 AS8075 Microsoft Corporation 0.28ms from London, GB
114.163.206.0 AS4713 NTT DOCOMO BUSINESS,Inc. 1.69ms from Osaka, JP
124.133.143.48 AS4837 CHINA UNICOM China169 Backbone 6.57ms from Qingdao, CN
13.57.110.208 AS16509 Amazon.com, Inc. 0.12ms from San Jose, US
126.251.113.48 AS131937 Joetsu Cable Vision 5.14ms from Tokyo, JP
60.98.47.208 AS17676 SoftBank Corp. 2.99ms from Tokyo, JP
66.217.78.192 AS7029 Windstream Communications LLC 0.51ms from Ashburn, US
111.114.100.48 AS4538 China Education and Research Network Center 16.83ms from Chengdu, CN
173.21.246.128 AS30036 Mediacom Communications Corp 6.84ms from Chicago, US
183.230.210.160 AS9808 China Mobile Communications Group Co., Ltd. 5.19ms from Chongqing, CN
86.44.13.240 AS5466 Eircom Limited 2.63ms from Dublin, IE
68.150.65.0 AS6327 Shaw Communications 3.19ms from Edmonton, CA

Traceroute

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

$
traceroute -a -n -q1 -f2 185.255.119.1
traceroute to 185.255.119.1 (185.255.119.1): 64 hops max, 52 byte packets
2 [] 91.210.16.186 1.304 ms
3 [AS39791] 89.111.69.1 0.446 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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