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 237,684,487,542,793,012,780,631,851,008
ASN type ISP
Registry ripe
Allocated 6 years ago on Oct 21, 2019
Updated 6 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

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

IP Address ASN Details
109.234.44.41 AS57728 CEZNET s.r.o. 1.94ms from Prague, CZ
188.122.195.2 AS57728 CEZNET s.r.o. 5.60ms from Prague, CZ
185.255.119.2 AS57728 CEZNET s.r.o. 0.41ms from Prague, CZ
2a00:1807:6::1 AS57728 CEZNET s.r.o. 0.72ms from Prague, CZ
109.234.47.246 AS57728 CEZNET s.r.o. 1.84ms from Prague, CZ
188.122.216.165 AS57728 CEZNET s.r.o. 4.06ms from Prague, CZ
188.122.193.129 AS57728 CEZNET s.r.o. 8.21ms from Prague, CZ
188.122.221.1 AS57728 CEZNET s.r.o. 4.15ms from Prague, CZ
188.122.199.130 AS57728 CEZNET s.r.o. 5.59ms from Prague, CZ
188.122.212.1 AS57728 CEZNET s.r.o. 4.15ms from Prague, CZ
81.25.22.161 AS57728 CEZNET s.r.o. 1.94ms from Prague, CZ
81.25.18.217 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
188.122.219.129 AS57728 CEZNET s.r.o. 4.34ms from Prague, CZ
188.122.208.20 AS57728 CEZNET s.r.o. 4.03ms from Prague, CZ
188.122.201.164 AS57728 CEZNET s.r.o. 4.16ms from Prague, CZ
188.122.211.233 AS57728 CEZNET s.r.o. 4.02ms from Prague, CZ
2a00:1800:ff0:31::1 AS57728 CEZNET s.r.o. 2.64ms from Prague, CZ
188.122.220.1 AS57728 CEZNET s.r.o. 4.10ms from Prague, CZ
188.122.202.202 AS57728 CEZNET s.r.o. 4.14ms from Prague, CZ
2a00:1800:ff2:2::1 AS57728 CEZNET s.r.o. 2.80ms from Prague, CZ
81.25.17.105 AS57728 CEZNET s.r.o. 1.90ms from Prague, CZ
185.255.116.214 AS57728 CEZNET s.r.o. 0.35ms from Prague, CZ
188.122.203.255 AS57728 CEZNET s.r.o. 3.50ms from Prague, CZ
188.122.196.137 AS57728 CEZNET s.r.o. 4.03ms from Prague, CZ
109.234.46.1 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
73.117.51.192 AS7922 Comcast Cable Communications, LLC 12.06ms from Ashburn, US
86.189.198.160 AS2856 British Telecommunications PLC 2.47ms from Erith, GB
80.133.94.96 AS3320 Deutsche Telekom AG 7.21ms from Frankfurt am Main, DE
154.49.98.112 AS174 Cogent Communications, LLC 0.60ms from London, GB
92.207.69.240 AS31655 Gamma Telecom Holdings Ltd 3.83ms from London, GB
221.225.67.240 AS140292 CHINATELECOM Jiangsu province Suzhou 5G network 6.76ms from Nanjing, CN
113.13.40.112 AS4134 CHINANET-BACKBONE 6.84ms from Nanning, CN
118.111.202.32 AS2518 BIGLOBE Inc. 7.53ms from Osaka, JP
23.116.232.192 AS7018 AT&T Enterprises, LLC 5.46ms from San Jose, US
140.129.130.64 AS1659 Taiwan Academic Network (TANet) Information Center 3.43ms from Taipei, TW
35.75.156.32 AS16509 Amazon.com, Inc. 0.17ms from Tokyo, JP
219.101.32.96 AS9600 So-net Corporation 1.59ms from Tokyo, JP
178.223.190.112 AS8400 TELEKOM SRBIJA a.d. 5.50ms from Belgrade, RS
40.141.189.128 AS7029 Windstream Communications LLC 9.55ms from Chicago, US
34.174.74.176 AS396982 Google LLC 0.12ms from Dallas, US
52.31.120.160 AS16509 Amazon.com, Inc. 0.17ms from Dublin, IE
113.108.95.112 AS4134 CHINANET-BACKBONE 1.80ms from Guangzhou, CN
84.130.163.176 AS3320 Deutsche Telekom AG 1.74ms from Hamburg, DE
91.4.191.32 AS3320 Deutsche Telekom AG 6.29ms from Hamburg, DE
178.186.170.64 AS12389 PJSC Rostelecom 5.75ms from Novosibirsk, RU
86.254.160.48 AS3215 Orange S.A. 10.19ms from Paris, FR
86.241.50.176 AS3215 Orange S.A. 7.37ms from Saint-Denis, FR
43.200.40.0 AS16509 Amazon.com, Inc. 0.17ms from Seoul, KR
116.124.55.128 AS9318 SK Broadband Co Ltd 7.63ms from Seoul, KR
114.35.161.128 AS3462 Data Communication Business Group 5.52ms from Taichung, TW

Traceroute

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

$
traceroute -a -n -q1 -f2 188.122.220.1
traceroute to 188.122.220.1 (188.122.220.1): 64 hops max, 52 byte packets
2 [] 91.210.16.186 1.238 ms
3 [AS39791] 89.111.64.25 1.577 ms
5 *
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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