81.2.192.0/18

AS24806 · INTERNET CZ, a.s.

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Summary

Country	Czechia
Domain	internet-cz.cz
ASN	AS24806
Registry	RIPE
ID	CZ-INTERNET-20020404

WHOIS Details

inetnum:        81.2.192.0 - 81.2.255.255
org:            ORG-ICa1-RIPE
netname:        CZ-INTERNET-20020404
country:        CZ
admin-c:        ES4377-RIPE
tech-c:         PK677-RIPE
tech-c:         FK4606-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         INTERNET-CZ-MNT
mnt-routes:     INTERNET-CZ-MNT
created:        2002-04-22T13:57:59Z
last-modified:  2025-12-11T09:11:55Z
source:         RIPE
abuse-email:    abuse@forpsi.com
abuse-c:        ICZ-RIPE
abuse-org:      ORG-ICa1-RIPE

organisation:   ORG-ICa1-RIPE
org-name:       INTERNET CZ, a.s.
country:        CZ
org-type:       LIR
address:        Ktis 2
address:        38403
address:        Ktis
address:        CZECH REPUBLIC
phone:          +420 383835353
fax-no:         +420 383835354
admin-c:        SC279-RIPE
admin-c:        ES4377-RIPE
admin-c:        FK4606-RIPE
mnt-ref:        INTERNET-CZ-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         INTERNET-CZ-MNT
abuse-c:        ICZ-RIPE
created:        2004-04-17T11:04:30Z
last-modified:  2025-04-25T07:33:27Z
source:         RIPE
e-mail:         noc@forpsi.com
abuse-email:    abuse@forpsi.com
abuse-c:        ICZ-RIPE
abuse-org:      undefined

person:         Erich Syrovatka
address:        INTERNET CZ, a.s.
address:        Ktis 2
address:        Ktis
address:        384 03
address:        CZ
phone:          +420 383835353
nic-hdl:        ES4377-RIPE
mnt-by:         INTERNET-CZ-MNT
created:        2007-12-11T09:18:22Z
last-modified:  2017-10-30T21:57:50Z
source:         RIPE

person:         Frantisek Koller
address:        INTERNET CZ, a.s.
address:        Ktis 2
address:        Ktis
address:        384 03
address:        CZ
phone:          +420 383835353
nic-hdl:        FK4606-RIPE
mnt-by:         INTERNET-CZ-MNT
created:        2023-07-03T11:04:01Z
last-modified:  2023-07-03T11:04:01Z
source:         RIPE

person:         Petr Kolonicz
address:        INTERNET CZ,a.s.
address:        Ktis2
address:        Ktis
address:        38403
address:        cz
phone:          +420 383835353
e-mail:         petr@forpsi.net
nic-hdl:        PK677-RIPE
mnt-by:         INTERNET-CZ-MNT
created:        2002-04-25T05:53:44Z
last-modified:  2017-10-30T21:45:40Z
source:         RIPE

route:          81.2.192.0/18
descr:          INTERNET CZ, a.s.
origin:         AS24806
notify:         noc@internet-cz.cz
mnt-by:         INTERNET-CZ-MNT
created:        2002-05-07T07:57:50Z
last-modified:  2002-05-07T07:57:50Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 81.2.0.0/16

Range	ASN	Company	Num of IPs
81.2.64.0/18	AS20712	Andrews & Arnold Ltd	16,384
81.2.128.0/18	AS174	Cogent Communications Group LLC	16,384
81.2.0.0/18	AS12332	PJSC Rostelecom	16,384
81.2.176.0/21	AS48945	Independent Fibre Networks	2,048
81.2.56.0/21	AS12389	Dynamic Broadband Clients. Spassk	2,048
81.2.152.0/21	AS48945	Independent Fibre Networks	2,048
81.2.132.0/22	AS203591	TECNO GENERAL S.R.L	1,024
81.2.144.0/22	AS208905	EXELERA TELECOM LTD	1,024
81.2.150.0/23	AS198545	Cogent Communications Group LLC	512
81.2.142.0/23	AS198545	Cogent Communications Group LLC	512
81.2.190.0/24	AS205520	XTB-COGENT	256
81.2.128.0/24	AS19970	CarrierDomain Inc	256
81.2.187.0/24	AS208290	WIFISAX GmbH	256
81.2.187.0/24	AS208290	WIFISAX GmbH	256
81.2.191.0/24	AS200736	MEDIANET INVEST M.I.K.E	256
81.2.187.0/24	AS209784	WIFISAX GmbH	256
81.2.187.0/24	AS209784	WIFISAX GmbH	256
81.2.140.0/24	AS213671	4TH UTILITY HOLDINGS LIMITED	256
81.2.141.0/24	AS213671	4TH UTILITY HOLDINGS LIMITED	256
81.2.149.0/24	AS174	Netspark LTD	256
81.2.130.0/24	AS174	NICTECH P C	256
81.2.148.0/24	AS201042	SD1-Telecom	256

Hosted domains

There are 310,512 domain names hosted across 1,414 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
81.2.196.19	domacaudiaren.sk	124224
81.2.194.128	cdnxsalty9.com	98283
81.2.196.60	podlipami.info	20640
81.2.195.30	hifibrno.cz	4354
81.2.195.254	stairjumper.cz	3861
81.2.194.241	onclinic.cz	3838
81.2.195.31	grip-digital.com	3240
81.2.194.244	edsystem.cz	3159
81.2.195.32	jzdservices.eu	2919
81.2.196.170	akservices.cz	2557
81.2.196.46	finance.wien	2164
81.2.195.68	dreams-res.sk	2148
81.2.195.73	laasko.cz	2075
81.2.195.60	vsfs.cz	1606
81.2.195.115	czechmalefoot.com	1528
81.2.194.176	z-pension.eu	1149
81.2.195.125	basketnj.cz	1073
81.2.194.180	klikovky.cz	1029
81.2.195.103	thegoldbankhotel.com	1009
81.2.195.101	metalopolis.net	995

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

2,107 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
81.2.210.132	AS24806 INTERNET CZ, a.s.	`3.51ms` from Prague, CZ
81.2.228.64	AS24806 INTERNET CZ, a.s.	`3.46ms` from Prague, CZ
81.2.241.174	AS24806 INTERNET CZ, a.s.	`3.53ms` from Prague, CZ
81.2.232.144	AS24806 INTERNET CZ, a.s.	`0.22ms` from Prague, CZ
81.2.245.144	AS24806 INTERNET CZ, a.s.	`3.53ms` from Prague, CZ
81.2.244.204	AS24806 INTERNET CZ, a.s.	`3.52ms` from Prague, CZ
81.2.195.171	AS24806 INTERNET CZ, a.s.	`3.46ms` from Prague, CZ
81.2.219.244	AS24806 INTERNET CZ, a.s.	`3.87ms` from Prague, CZ
81.2.236.10	AS24806 INTERNET CZ, a.s.	`3.50ms` from Prague, CZ
81.2.247.79	AS24806 INTERNET CZ, a.s.	`3.52ms` from Prague, CZ
81.2.239.166	AS24806 INTERNET CZ, a.s.	`3.49ms` from Prague, CZ
81.2.255.51	AS24806 INTERNET CZ, a.s.	`3.53ms` from Prague, CZ
81.2.249.130	AS24806 INTERNET CZ, a.s.	`3.51ms` from Prague, CZ
81.2.243.172	AS24806 INTERNET CZ, a.s.	`3.53ms` from Prague, CZ
81.2.254.200	AS24806 INTERNET CZ, a.s.	`3.50ms` from Prague, CZ
81.2.253.133	AS24806 INTERNET CZ, a.s.	`3.52ms` from Prague, CZ
81.2.250.101	AS24806 INTERNET CZ, a.s.	`3.50ms` from Prague, CZ
81.2.196.33	AS24806 INTERNET CZ, a.s.	`3.41ms` from Prague, CZ
81.2.209.94	AS24806 INTERNET CZ, a.s.	`3.58ms` from Prague, CZ
81.2.206.97	AS24806 INTERNET CZ, a.s.	`3.66ms` from Prague, CZ
81.2.238.55	AS24806 INTERNET CZ, a.s.	`3.43ms` from Prague, CZ
81.2.217.27	AS24806 INTERNET CZ, a.s.	`3.45ms` from Prague, CZ
81.2.248.111	AS24806 INTERNET CZ, a.s.	`3.53ms` from Prague, CZ
81.2.198.27	AS24806 INTERNET CZ, a.s.	`3.46ms` from Prague, CZ
81.2.237.28	AS24806 INTERNET CZ, a.s.	`3.49ms` 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
79.104.34.226	AS3216 PJSC "Vimpelcom"	`0.57ms` from Amsterdam, NL
185.251.0.242	AS39572 DataWeb Global Group B.V.	`0.21ms` from Amsterdam, NL
197.39.145.162	AS8452 TE-AS	`3.64ms` from Cairo, EG
117.176.180.50	AS9808 China Mobile Communications Group Co., Ltd.	`6.07ms` from Chengdu, CN
93.107.122.66	AS15502 Vodafone Ireland Limited	`5.02ms` from Dublin, IE
96.11.121.130	AS10796 Charter Communications Inc	`7.07ms` from Flint, US
143.51.158.66	AS16086 DNA Oyj	`1.71ms` from Helsinki, FI
116.105.25.2	AS24086 Viettel Corporation	`9.69ms` from Ho Chi Minh City, VN
95.0.75.18	AS9121 Turk Telekomunikasyon Anonim Sirketi	`0.72ms` from Istanbul, TR
184.175.227.82	AS19531 Nodes Direct	`1.14ms` from Jacksonville, US
107.119.93.34	AS7018 AT&T Enterprises, LLC	`13.67ms` from Los Angeles, US
114.226.81.242	AS4134 CHINANET-BACKBONE	`5.89ms` from Nanjing, CN
67.79.132.130	AS33363 Charter Communications, Inc	`1.93ms` from Orlando, US
151.45.23.114	AS1267 WIND TRE S.P.A.	`11.60ms` from Rome, IT
201.117.221.34	AS8151 UNINET	`0.92ms` from Santiago de Queretaro, MX
163.255.222.18	AS4766 Korea Telecom	`5.21ms` from Seoul, KR
58.192.208.50	AS4538 China Education and Research Network Center	`11.54ms` from Shanghai, CN
39.108.216.130	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.60ms` from Shenzhen, CN
193.119.51.210	AS7545 TPG Telecom Limited	`5.04ms` from Sydney, AU
197.4.4.18	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`12.55ms` from Tunis, TN
38.127.146.82	AS174 Cogent Communications, LLC	`1.46ms` from Ashburn, US
162.241.45.50	AS19871 Network Solutions, LLC	`0.90ms` from Atlanta, US
158.69.244.162	AS16276 OVH SAS	`0.12ms` from Beauharnois, CA
189.123.195.66	AS28573 Claro NXT Telecomunicacoes Ltda	`6.78ms` from Curitiba, BR
174.136.63.130	AS33494 IHNetworks, LLC	`0.20ms` from Draper, US

Traceroute

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

traceroute -a -n -q1 -f2 81.2.235.56

traceroute to 81.2.235.56 (81.2.235.56): 64 hops max, 52 byte packets

2 [] 91.210.16.165 1.043 ms

3 [AS24806] 81.2.192.17 3.994 ms

4 [AS24806] 81.2.192.86 3.794 ms

5 [AS24806] 81.2.235.56 3.574 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On December 28th 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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