81.0.252.0/23

AS21430 · WIA spol. s.r.o.

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Summary

Country	Czechia
Domain	wia.cz
ASN	AS21430
Registry	RIPE
ID	CZ-WIA-20011214

WHOIS Details

inetnum:        81.0.251.0 - 81.0.253.255
netname:        CZ-WIA-20011214
country:        CZ
org:            ORG-Wss1-RIPE
admin-c:        PU100-RIPE
tech-c:         PU100-RIPE
status:         ALLOCATED PA
mnt-by:         WIA-AS-MNT
mnt-by:         RIPE-NCC-HM-MNT
created:        2022-07-28T08:08:25Z
last-modified:  2022-07-28T08:08:25Z
source:         RIPE
abuse-email:    abuse@wia.cz
abuse-c:        WAC9-RIPE
abuse-org:      ORG-Wss1-RIPE

organisation:   ORG-Wss1-RIPE
org-name:       WIA spol. s.r.o.
country:        CZ
org-type:       LIR
address:        Vojtesska 17
address:        110 00
address:        Praha 1
address:        CZECH REPUBLIC
phone:          +420 225 372 055
phone:          +420 246 035411
fax-no:         +420 246 035410
e-mail:         noc@wia.cz
admin-c:        FM1337-RIPE
admin-c:        PU100-RIPE
mnt-by:         WIA-AS-MNT
mnt-ref:        WIA-AS-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
abuse-c:        WAC9-RIPE
created:        2004-04-17T11:04:59Z
last-modified:  2020-12-16T12:19:39Z
source:         RIPE

person:         Pavel Uhliar
address:        Ceska 9
address:        351 01, Frant. Lazne
address:        Czech Republic
phone:          +420 246035411
fax-no:         +420 246035410
e-mail:         uhliar@wia.cz
nic-hdl:        PU100-RIPE
notify:         uhliar@wia.cz
created:        2001-10-24T09:03:52Z
last-modified:  2015-07-28T18:03:50Z
source:         RIPE
mnt-by:         WIA-AS-MNT

Nearby Ranges

BGP prefixes that overlap with 81.0.0.0/16

Range	ASN	Company	Num of IPs
81.0.0.0/18	AS15704	XTRA TELECOM S.A.	16,384
81.0.128.0/18	AS2116	GLOBALCONNECT AS	16,384
81.0.192.0/22	AS15685	CASABLANCA INT a.s.	1,024
81.0.248.0/23	AS51167	Contabo GmbH	512
81.0.124.0/23	AS12301	Invitech ICT Services Kft.	512
81.0.88.0/23	AS12301	Invitech ICT Services Kft.	512
81.0.96.0/23	AS12301	Invitech ICT Services Kft.	512
81.0.254.0/23	AS15685	CASABLANCA INT a.s.	512
81.0.242.0/23	AS204383	CASABLANCA INT a.s.	512
81.0.108.0/23	AS20845	DIGI - INVITEL pool	512
81.0.122.0/23	AS20845	DIGI - INVITEL pool	512
81.0.126.0/23	AS20845	DIGI - INVITEL pool	512
81.0.98.0/23	AS20845	DIGI - INVITEL pool	512
81.0.210.0/23	AS21430	WIA spol. s.r.o.	512
81.0.244.0/23	AS21430	WIA spol. s.r.o.	512
81.0.218.0/23	AS51167	Contabo GmbH	512
81.0.220.0/23	AS51167	Contabo GmbH	512
81.0.246.0/23	AS51167	Contabo GmbH	512
81.0.229.0/24	AS21430	WIA spol. s.r.o.	256
81.0.68.0/24	AS12301	Egomnet Kft.	256
81.0.119.0/24	AS12301	Data center	256
81.0.104.0/24	AS12301	Datacenter Hosting Internet	256
81.0.97.0/24	AS12301	Net-Tech Consulting Kft.	256
81.0.67.0/24	AS12301	Euroweb Internet Service Provider	256
81.0.199.0/24	AS15685	CASABLANCA INT a.s.	256
81.0.217.0/24	AS15685	CASABLANCA INT a.s.	256
81.0.226.0/24	AS15685	NETHOST s.r.o.	256
81.0.228.0/24	AS15685	CASABLANCA INT a.s.	256
81.0.250.0/24	AS15685	CASABLANCA INT a.s.	256
81.0.227.0/24	AS21430	WIA spol. s.r.o.	256
81.0.124.0/24	AS12301	Deploy Is Kft.	256
81.0.230.0/24	AS204383	CASABLANCA INT a.s.	256

Hosted domains

There are 9 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
81.0.252.214	antispam.cz	7
81.0.252.213	excello.cz	2

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

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

IP Address	ASN	Details
81.0.252.210	AS21430 WIA spol. s.r.o.	`0.37ms` from Prague, CZ
81.0.253.27	AS21430 WIA spol. s.r.o.	`0.36ms` 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
40.65.236.135	AS8075 Microsoft Corporation	`0.23ms` from Boydton, US
217.136.40.23	AS5432 Proximus NV	`3.18ms` from Brussels, BE
169.55.58.199	AS36351 IBM Cloud	`1.17ms` from Dallas, US
173.247.247.39	AS22611 InMotion Hosting, Inc.	`0.23ms` from Los Angeles, US
73.87.2.119	AS7922 Comcast Cable Communications, LLC	`11.71ms` from Manassas, US
34.138.194.55	AS396982 Google LLC	`0.14ms` from Moncks Corner, US
39.73.208.231	AS4837 CHINA UNICOM China169 Backbone	`4.19ms` from Qingdao, CN
112.236.173.55	AS4837 CHINA UNICOM China169 Backbone	`7.62ms` from Qingdao, CN
118.56.68.119	AS4766 Korea Telecom	`7.14ms` from Seoul, KR
15.190.113.23	AS16509 Amazon.com, Inc.	`0.11ms` from Taipei, TW
60.149.160.247	AS17676 SoftBank Corp.	`2.91ms` from Tokyo, JP
99.249.219.119	AS812 Rogers Communications Canada Inc.	`6.95ms` from Toronto, CA
35.90.110.71	AS16509 Amazon.com, Inc.	`0.31ms` from Boardman, US
38.135.29.39	AS152179 GLOBAL COMMUNICATION NETWORK LIMITED	`0.37ms` from Hong Kong, HK
216.150.117.23	AS17049 MBO Video, LLC	`6.27ms` from Kansas City, US
83.49.151.183	AS3352 TELEFONICA DE ESPANA S.A.U.	`7.26ms` from Madrid, ES
99.3.187.167	AS7018 AT&T Enterprises, LLC	`2.01ms` from Miami, US
31.186.61.23	AS39045 Gazprom telecom LLC	`16.20ms` from Moscow, RU
111.59.5.151	AS9808 China Mobile Communications Group Co., Ltd.	`3.32ms` from Nanning, CN
83.114.74.55	AS3215 Orange S.A.	`2.77ms` from Paris, FR
3.94.27.87	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
213.225.220.103	AS29438 Momax Network S.r.l.	`5.01ms` from Rome, IT
95.224.52.135	AS3269 Telecom Italia S.p.A.	`17.13ms` from Rome, IT
13.65.21.7	AS8075 Microsoft Corporation	`0.20ms` from San Antonio, US
67.183.9.167	AS7922 Comcast Cable Communications, LLC	`6.18ms` from Seattle, US

Traceroute

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

traceroute -a -n -q1 81.0.253.10

traceroute to 81.0.253.10 (81.0.253.10): 64 hops max, 52 byte packets

1 [AS42473] 178.255.154.92 0.171 ms

2 [AS21430] 81.0.253.10 0.449 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On December 14th 2025

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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