1. All IP Ranges
  2. 81.0.0.0/8
  3. 81.25.0.0/16
  4. AS57728  | 81.25.24.0/21

81.25.24.0/21

AS57728  ·  CEZNET s.r.o.

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Summary

Country Czechia
Domain ceznet.cz
ASN AS57728
Registry RIPE
ID CEZNET

WHOIS Details

inetnum:        81.25.28.0 - 81.25.30.255
netname:        CEZNET
descr:          CER
country:        CZ
admin-c:        CH13482-RIPE
tech-c:         CH13482-RIPE
status:         ASSIGNED PA
mnt-by:         CEZNET-MNT
created:        2006-07-24T16:55:44Z
last-modified:  2025-09-16T13:21:19Z
source:         RIPE
abuse-email:    dohled@ceznet.cz
abuse-c:        CH13482-RIPE
abuse-org:      ORG-TBS13-RIPE

role:           CEZNET hostmaster
address:        CEZNET s.r.o.
address:        Vilemovska 1602
address:        Tachov
address:        347 01
address:        The Czech Republic
e-mail:         dohled@ceznet.cz
abuse-mailbox:  dohled@ceznet.cz
phone:          +420 211 046 699
admin-c:        MV6352-RIPE
tech-c:         KD4331-RIPE
tech-c:         MJ83172-RIPE
nic-hdl:        CH13482-RIPE
mnt-by:         CEZNET-MNT
created:        2024-01-12T08:23:53Z
last-modified:  2024-01-12T08:25:01Z
source:         RIPE

route:          81.25.24.0/21
origin:         AS57728
descr:          CEZNET s.r.o.
descr:          CER
mnt-by:         CEZNET-MNT
created:        2020-04-09T07:53:28Z
last-modified:  2025-09-16T11:37:08Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 81.25.0.0/16

Range ASN Company Num of IPs
81.25.208.0/20 AS39478 ASFINAG 4,096
81.25.240.0/20 AS51504 AS Telset 4,096
81.25.128.0/20 AS41589 Lux Green Technologies Sarl 4,096
81.25.96.0/20 AS60409 Associazione Vedica 4,096
81.25.192.0/20 AS2914 NTT United Kingdom Ltd 4,096
81.25.160.0/20 AS15943 wilhelm.tel GmbH 4,096
81.25.144.0/20 AS59702 Junet AB 4,096
81.25.224.0/20 AS15595 Skyline Electronics Ltd. 4,096
81.25.176.0/20 AS20963 P/F 20.11.19 4,096
81.25.0.0/20 AS24789 PJSC Rostelecom 4,096
81.25.40.0/21 AS60273 Altanetica S.L. 2,048
81.25.80.0/21 AS39078 GDM Konsult AB 2,048
81.25.32.0/21 AS60273 Altanetica S.L. 2,048
81.25.64.0/22 AS60720 KVIKTEL LLC 1,024
81.25.72.0/22 AS208496 Daily Telecom Mobile s.r.l. 1,024
81.25.76.0/22 AS31257 LIR Limited 1,024
81.25.76.0/23 AS31257 Orion Telecom LLC 512
81.25.78.0/23 AS31257 Orion Telecom LLC 512
81.25.118.0/24 AS41541 swhosting.com 256
81.25.119.0/24 AS41541 swhosting.com 256
81.25.120.0/24 AS41541 swhosting.com 256
81.25.121.0/24 AS41541 swhosting.com 256
81.25.122.0/24 AS41541 swhosting.com 256
81.25.123.0/24 AS41541 swhosting.com 256
81.25.124.0/24 AS41541 swhosting.com 256
81.25.125.0/24 AS41541 swhosting.com 256
81.25.126.0/24 AS41541 swhosting.com 256
81.25.127.0/24 AS41541 swhosting.com 256
81.25.115.0/24 AS41541 swhosting.com 256
81.25.71.0/24 AS47204 MCS LLC 256
81.25.68.0/24 AS47247 Maximum LLC 256
81.25.113.0/24 AS41541 swhosting.com 256
81.25.69.0/24 AS202376 Arvid Logicum OU 256
81.25.70.0/24 AS202104 Server-plus LLC 256
81.25.116.0/24 AS41541 swhosting.com 256
81.25.228.0/24 AS15595 Skyline ISP 256
81.25.117.0/24 AS41541 swhosting.com 256

Hosted domains

There are 37 domain names hosted across 11 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
81.25.31.235 h2ocorp.cz 15
81.25.28.84 whitesoft.be 5
81.25.27.204 penzion-neuland.cz 5
81.25.29.229 chlas.cz 4
81.25.30.19 zenskylekar.cz 2
81.25.31.243 experimentalcabaret.com 2
81.25.26.2 st-software.com 1
81.25.28.78 experimentalcabaret.cz 1
81.25.29.245 ojuza.cz 1
81.25.31.7 hpshare.cz 1
81.25.26.4 st-software-ftp.com 1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity
Read more

Pingable IPs

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

IP Address ASN Details
81.25.28.0 AS57728 CEZNET s.r.o. 2.45ms from Prague, CZ
81.25.27.129 AS57728 CEZNET s.r.o. 2.64ms from Prague, CZ
81.25.29.161 AS57728 CEZNET s.r.o. 2.53ms from Prague, CZ
81.25.30.65 AS57728 CEZNET s.r.o. 2.49ms from Prague, CZ
81.25.31.17 AS57728 CEZNET s.r.o. 2.52ms from Prague, CZ
81.25.25.30 AS57728 CEZNET s.r.o. 3.23ms from Prague, CZ
81.25.26.147 AS57728 CEZNET s.r.o. 2.61ms 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
2.51.243.85 AS5384 Emirates Internet 1.22ms from Al Fujairah City, AE
86.84.13.133 AS1136 KPN B.V. 0.98ms from Amsterdam, NL
140.32.84.165 AS668 United States Department of Defense (DoD) 2.68ms from Ashburn, US
47.49.150.245 AS20115 Charter Communications LLC 11.73ms from Atlanta, US
132.234.199.181 AS7575 Australian Academic and Research Network (AARNet) 0.77ms from Brisbane, AU
188.157.169.37 AS5483 Magyar Telekom Plc. 4.21ms from Budapest, HU
156.193.97.85 AS8452 TE-AS 5.44ms from Cairo, EG
62.133.60.21 AS215540 GLOBAL CONNECTIVITY SOLUTIONS LLP 0.46ms from Frankfurt am Main, DE
38.71.7.5 AS32696 Tri State Voice & Data, LLC 1.99ms from New York City, US
54.204.156.117 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
75.198.163.5 AS6167 Verizon Business 13.99ms from San Jose, US
78.13.16.149 AS16509 Amazon.com, Inc. 0.37ms from Santiago de Queretaro, MX
183.106.45.197 AS4766 Korea Telecom 8.60ms from Seoul, KR
183.195.230.133 AS24400 Shanghai Mobile Communications Co.,Ltd. 3.01ms from Shanghai, CN
154.44.133.165 AS35203 Goldenphone GmbH 3.48ms from Zuerich, CH
185.184.99.133 AS206516 ProRail B.V. 1.84ms from Amsterdam, NL
20.159.212.245 AS8070 Microsoft Corporation 0.58ms from Boydton, US
222.179.102.53 AS4134 CHINANET-BACKBONE 2.12ms from Chongqing, CN
189.76.17.149 AS22689 SERCOMTEL S/A TELECOMUNICACOES 7.88ms from Curitiba, BR
68.116.219.133 AS20115 Charter Communications LLC 6.29ms from Dallas, US
91.2.122.101 AS3320 Deutsche Telekom AG 2.13ms from Hamburg, DE
103.106.113.69 AS136880 PT. Sumatra Multimedia Solusi 4.94ms from Jakarta, ID
194.3.127.37 AS3215 Orange S.A. 1.72ms from Le Lamentin, MQ
87.3.252.149 AS3269 Telecom Italia S.p.A. 8.50ms from Naples, IT
82.210.253.21 AS48951 Telekom Deutschland GmbH 7.83ms from Nuernberg, DE

Traceroute

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

$
traceroute -a -n -q1 -f3 81.25.27.87
traceroute to 81.25.27.87 (81.25.27.87): 64 hops max, 52 byte packets
4 [AS39791] 89.111.69.1 0.426 ms
7 *
8 [AS57728] 81.25.27.87 2.848 ms
Measurement taken from IPinfo ProbeNet in Prague, CZ
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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