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
188.122.203.255 AS57728 CEZNET s.r.o. 2.76ms from Prague, CZ
188.122.202.202 AS57728 CEZNET s.r.o. 2.53ms from Prague, CZ
81.25.27.1 AS57728 CEZNET s.r.o. 2.57ms from Prague, CZ
109.234.47.246 AS57728 CEZNET s.r.o. 1.83ms from Prague, CZ
188.122.197.249 AS57728 CEZNET s.r.o. 2.48ms from Prague, CZ
188.122.216.1 AS57728 CEZNET s.r.o. 2.60ms from Prague, CZ
188.122.193.1 AS57728 CEZNET s.r.o. 7.49ms from Prague, CZ
81.25.18.217 AS57728 CEZNET s.r.o. 1.88ms from Prague, CZ
109.234.43.1 AS57728 CEZNET s.r.o. 4.19ms from Prague, CZ
2a00:1800:ff2:2::1 AS57728 CEZNET s.r.o. 2.82ms from Prague, CZ
2a0a:b6c0:0:10::1 AS57728 CEZNET s.r.o. 2.35ms from Prague, CZ
185.255.118.30 AS57728 CEZNET s.r.o. 0.49ms from Prague, CZ
188.122.212.129 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
188.122.223.129 AS57728 CEZNET s.r.o. 5.38ms from Prague, CZ
81.25.17.17 AS57728 CEZNET s.r.o. 1.89ms from Prague, CZ
2a00:1800:1:5:: AS57728 CEZNET s.r.o. 4.98ms from Prague, CZ
188.122.199.130 AS57728 CEZNET s.r.o. 4.87ms from Prague, CZ
188.122.213.1 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
81.25.20.233 AS57728 CEZNET s.r.o. 1.91ms from Prague, CZ
188.122.192.113 AS57728 CEZNET s.r.o. 2.48ms from Prague, CZ
185.255.119.1 AS57728 CEZNET s.r.o. 0.43ms from Prague, CZ
81.25.31.161 AS57728 CEZNET s.r.o. 2.56ms from Prague, CZ
109.234.40.177 AS57728 CEZNET s.r.o. 1.93ms from Prague, CZ
109.234.44.41 AS57728 CEZNET s.r.o. 1.93ms from Prague, CZ
188.122.220.1 AS57728 CEZNET s.r.o. 2.51ms 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
108.234.50.176 AS7018 AT&T Enterprises, LLC 7.13ms from Atlanta, US
84.236.176.32 AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL 6.33ms from Madrid, ES
185.53.192.208 AS200148 FIDOKA srl SB 11.36ms from Milan, IT
138.117.55.128 AS264229 GLOBAL FLASH TELECOM E TECNOLOGIA LTDA - ME 1.30ms from Rio de Janeiro, BR
4.181.26.192 AS8075 Microsoft Corporation 0.34ms from Seoul, KR
118.139.182.144 AS26496 GoDaddy.com, LLC 0.99ms from Singapore, SG
42.176.79.96 AS4837 CHINA UNICOM China169 Backbone 8.45ms from Tieling, CN
89.161.55.128 AS39375 Telekomunikacja Podlasie Sp. z o.o. 2.91ms from Warsaw, PL
66.217.78.192 AS7029 Windstream Communications LLC 0.54ms from Ashburn, US
20.115.65.128 AS8075 Microsoft Corporation 0.45ms from Ashburn, US
97.149.11.96 AS6167 Verizon Business 13.92ms from Chicago, US
73.102.219.224 AS7922 Comcast Cable Communications, LLC 11.93ms from Chicago, US
207.210.240.16 AS17378 TierPoint, LLC 0.67ms from Dallas, US
66.52.14.16 AS20115 Charter Communications LLC 3.95ms from Dallas, US
187.144.121.176 AS8151 UNINET 0.95ms from Guadalajara, MX
88.249.55.176 AS9121 Turk Telekomunikasyon Anonim Sirketi 16.07ms from Istanbul, TR
86.146.230.16 AS2856 British Telecommunications PLC 4.92ms from London, GB
86.13.59.80 AS5089 Virgin Media Limited 7.94ms from London, GB
16.54.130.48 AS16509 Amazon.com, Inc. 0.14ms from Montreal, CA
52.200.20.176 AS14618 Amazon.com, Inc. 0.25ms from Reston, US
110.45.58.0 AS10066 LG HelloVision Corp. 8.43ms from Seoul, KR
14.8.48.128 AS2516 KDDI CORPORATION 5.06ms from Tokyo, JP
84.159.122.128 AS3320 Deutsche Telekom AG 6.78ms from Frankfurt am Main, DE
20.113.30.160 AS8075 Microsoft Corporation 0.30ms from Frankfurt am Main, DE
49.63.177.64 AS4766 Korea Telecom 5.64ms from Incheon, KR

Traceroute

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

$
traceroute -a -n -q1 -f2 188.122.215.1
traceroute to 188.122.215.1 (188.122.215.1): 64 hops max, 52 byte packets
2 [] 91.210.16.186 1.089 ms
3 [AS39791] 89.111.64.25 1.092 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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