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 7 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 ██████████ 26
81.25.16.230 ██████████ 17
188.122.202.244 ██████████ 17
188.122.212.135 ██████████ 12
109.234.40.198 ██████████ 10
188.122.212.8 ██████████ 7
81.25.29.229 ██████████ 4
81.25.27.204 ██████████ 4
188.122.213.155 █████████ 4
188.122.192.110 ██████████ 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

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

IP Address ASN Details
81.25.26.1 AS57728 CEZNET s.r.o. 2.63ms from Prague, CZ
188.122.202.202 AS57728 CEZNET s.r.o. 2.53ms from Prague, CZ
188.122.219.129 AS57728 CEZNET s.r.o. 2.90ms from Prague, CZ
188.122.210.129 AS57728 CEZNET s.r.o. 2.84ms from Prague, CZ
109.234.47.246 AS57728 CEZNET s.r.o. 1.83ms from Prague, CZ
188.122.216.1 AS57728 CEZNET s.r.o. 2.60ms from Prague, CZ
109.234.41.9 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
2a00:1807:6::1 AS57728 CEZNET s.r.o. 0.71ms from Prague, CZ
109.234.46.1 AS57728 CEZNET s.r.o. 1.92ms from Prague, CZ
185.255.116.158 AS57728 CEZNET s.r.o. 0.35ms from Prague, CZ
81.25.20.233 AS57728 CEZNET s.r.o. 1.91ms from Prague, CZ
188.122.220.1 AS57728 CEZNET s.r.o. 2.51ms from Prague, CZ
81.25.16.195 AS57728 CEZNET s.r.o. 1.90ms from Prague, CZ
185.255.119.1 AS57728 CEZNET s.r.o. 0.43ms from Prague, CZ
188.122.222.178 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
188.122.223.129 AS57728 CEZNET s.r.o. 5.38ms from Prague, CZ
2a00:1807:7:2702::1 AS57728 CEZNET s.r.o. 0.69ms from Prague, CZ
188.122.212.129 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
109.234.40.177 AS57728 CEZNET s.r.o. 1.93ms from Prague, CZ
188.122.193.1 AS57728 CEZNET s.r.o. 7.49ms from Prague, CZ
188.122.208.227 AS57728 CEZNET s.r.o. 2.48ms from Prague, CZ
81.25.18.217 AS57728 CEZNET s.r.o. 1.88ms from Prague, CZ
81.25.29.161 AS57728 CEZNET s.r.o. 2.52ms from Prague, CZ
109.234.45.33 AS57728 CEZNET s.r.o. 1.97ms from Prague, CZ
2a00:1800:0:ffff::f3 AS57728 CEZNET s.r.o. 2.53ms 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
85.75.113.240 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.23ms from Athens, GR
73.95.215.0 AS7922 Comcast Cable Communications, LLC 5.70ms from Denver, US
14.223.125.176 AS4134 CHINANET BACKBONE 2.93ms from Guangzhou, CN
222.252.159.0 AS45899 VNPT Corp 3.20ms from Hanoi, VN
86.182.154.176 AS2856 British Telecommunications PLC 17.30ms from London, GB
47.6.138.32 AS20115 Charter Communications LLC 12.68ms from San Jose, US
162.232.212.112 AS7018 AT&T Enterprises, LLC 19.37ms from San Jose, US
99.89.2.128 AS7018 AT&T Enterprises, LLC 4.09ms from San Jose, US
24.113.152.64 AS11404 Wave Broadband 4.87ms from Seattle, US
221.145.118.64 AS4766 Korea Telecom 1.59ms from Seoul, KR
4.181.26.192 AS8075 Microsoft Corporation 0.34ms from Seoul, KR
89.161.55.128 AS39375 Telekomunikacja Podlasie Sp. z o.o. 2.91ms from Warsaw, PL
5.13.194.16 AS8708 DIGI ROMANIA S.A. 5.88ms from Bacau, RO
75.185.204.144 AS10796 Charter Communications Inc 6.94ms from Cleveland, US
197.92.183.16 AS20011 Dimension Data 2.04ms from Durban, ZA
109.153.172.144 AS2856 British Telecommunications PLC 4.93ms from London, GB
93.190.175.0 AS47227 Charles Briscoe-Smith trading as Servology 0.69ms from London, GB
177.30.17.64 AS26615 TIM S/A 2.63ms from Osasco, BR
106.68.24.240 AS7545 TPG Telecom Limited 1.49ms from Perth, AU
100.53.88.192 AS14618 Amazon.com, Inc. 0.42ms from Reston, US
138.117.55.128 AS264229 GLOBAL FLASH TELECOM E TECNOLOGIA LTDA - ME 1.30ms from Rio de Janeiro, BR
186.244.135.208 AS7738 V tal 1.62ms from Rio de Janeiro, BR
79.33.97.144 AS3269 Telecom Italia S.p.A. 15.33ms from Rome, IT
58.37.173.80 AS4812 China Telecom (Group) 4.39ms from Shanghai, CN
118.139.182.144 AS26496 GoDaddy.com, LLC 0.99ms from Singapore, SG

Traceroute

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

$
traceroute -a -n -q1 -f2 81.25.31.165
traceroute to 81.25.31.165 (81.25.31.165): 64 hops max, 52 byte packets
2 [] 91.210.16.186 1.265 ms
3 [AS39791] 89.111.69.1 0.448 ms
6 *
7 [AS57728] 81.25.31.165 3.255 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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