81.90.160.0/20

AS5610 · O2 Czech Republic, a.s.

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Summary

Country	Czechia
Domain	o2.cz
ASN	AS5610
Registry	RIPE
ID	CZ-CZNET-20020704

WHOIS Details

inetnum:        81.90.160.0 - 81.90.175.255
netname:        CZ-CZNET-20020704
country:        CZ
org:            ORG-STaN1-RIPE
admin-c:        CZO2-RIPE
admin-c:        VAKO1-RIPE
tech-c:         CZO2-RIPE
tech-c:         VAKO1-RIPE
status:         ALLOCATED PA
notify:         reg@telecom.cz
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS5610-MTN
mnt-lower:      AS5610-MTN
mnt-routes:     AS5610-MTN
mnt-domains:    AS5610-MTN
created:        2017-11-14T08:41:09Z
last-modified:  2018-12-18T08:17:57Z
source:         RIPE
abuse-email:    abuse@o2.cz
abuse-c:        AR14410-RIPE
abuse-org:      ORG-STaN1-RIPE

organisation:   ORG-STaN1-RIPE
org-name:       O2 Czech Republic, a.s.
country:        CZ
org-type:       LIR
address:        Za Brumlovkou 266/2
address:        140 22
address:        Praha 4 - Michle
address:        CZECH REPUBLIC
phone:          +420 2 71466184
fax-no:         +420 2 71464414
e-mail:         marek.vogel@o2.cz
admin-c:        VAKO1-RIPE
admin-c:        MV96-RIPE
admin-c:        HVJI1-RIPE
tech-c:         CZO2-RIPE
abuse-c:        AR14410-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        AS5610-MTN
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS5610-MTN
created:        2004-04-17T11:04:17Z
last-modified:  2020-12-16T12:31:56Z
source:         RIPE

role:           5610-Tech-and-Admin
address:        Za Brumlovkou 266/2
address:        Praha 4 - Michle, PSC 140 22
e-mail:         router@o2.cz
nic-hdl:        CZO2-RIPE
admin-c:        VAKO1-RIPE
admin-c:        MV96-RIPE
admin-c:        HVJI1-RIPE
tech-c:         VAKO1-RIPE
tech-c:         HVJI1-RIPE
abuse-mailbox:  abuse@o2.cz
org:            ORG-STaN1-RIPE
mnt-by:         AS5610-MTN
created:        2016-02-18T09:58:30Z
last-modified:  2018-04-20T10:44:21Z
source:         RIPE

person:         Vaclav Kordula
address:        O2 Czech Republic, a.s.
address:        Za Brumlovkou 266/2
address:        Praha 4 - Michle, PS? 140 22
address:        Czech Republic
phone:          +420 2 714668845
e-mail:         vaclav.kordula@o2.cz
nic-hdl:        VAKO1-RIPE
notify:         vaclav.kordula@o2.cz
mnt-by:         AS5610-MTN
created:        1970-01-01T00:00:00Z
last-modified:  2016-02-12T13:32:30Z
source:         RIPE

route:          81.90.160.0/20
descr:          O2 InternetHome TermsNet
origin:         AS5610
mnt-by:         AS5610-MTN
created:        2016-11-15T14:13:09Z
last-modified:  2016-11-15T14:13:09Z
source:         RIPE

Overlapping Ranges

BGP prefixes that are contained by 81.90.160.0/20

Range	ASN	Company	Num of IPs
81.90.168.0/24	AS5610	Elsat spol. s r.o.	256

Nearby Ranges

BGP prefixes that overlap with 81.90.0.0/16

Range	ASN	Company	Num of IPs
81.90.0.0/20	AS12739	JSC Netline	4,096
81.90.48.0/20	AS29003	IP TELECOM, SERVICOS DE TELECOMUNICACOES S.A.	4,096
81.90.80.0/20	AS29646	FFastfill UK Limited	4,096
81.90.240.0/20	AS39761	ABAK, Co.Ltd.	4,096
81.90.208.0/20	AS39775	Limited Liability Company HyperNet	4,096
81.90.192.0/20	AS39835	goetel GmbH	4,096
81.90.128.0/20	AS48901	DSNET Ltd	4,096
81.90.64.0/20	AS15830	Equinix (Finland) Oy	4,096
81.90.32.0/20	AS25058	CMO Internet Dienstleistungen GmbH	4,096
81.90.224.0/20	AS25071	RadioCom Ltd	4,096
81.90.112.0/20	AS2586	Elisa Eesti AS	4,096
81.90.128.0/20	AS25048	DSNET Ltd	4,096
81.90.180.0/22	AS50340	Kokunov Evgeny Andreevich	1,024
81.90.168.0/24	AS5610	Elsat spol. s r.o.	256
81.90.190.0/24	AS9009	Think Huge Ltd	256
81.90.191.0/24	AS199967	Think Huge Ltd	256
81.90.30.0/24	AS201664	NetWarm LTD	256
81.90.25.0/24	AS207567	intezio	256
81.90.28.0/24	AS207567	Frankfurt, Germany	256
81.90.31.0/24	AS207713	GLOBAL INTERNET SOLUTIONS LLC	256
81.90.188.0/24	AS212238	Think Huge Ltd	256
81.90.189.0/24	AS212238	Think Huge Ltd	256
81.90.29.0/24	AS215540	GLOBAL CONNECTIVITY SOLUTIONS LLP	256
81.90.133.0/24	AS25048	DSNet Ltd	256
81.90.237.0/24	AS25071	ISP RadioCom	256
81.90.134.0/24	AS48901	Office	256
81.90.136.0/24	AS48901	Office	256
81.90.137.0/24	AS48901	Office	256

Hosted domains

There are 52 domain names hosted across 10 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
81.90.160.71	gowin.ro	27
81.90.160.100	nemovitostiliberec.cz	8
81.90.160.107	pouzitekompresory.cz	3
81.90.161.226	veverkovic.cz	2
81.90.160.97	pronajem-ceske-budejovice.com	2
81.90.160.69	guildprint.cz	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

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

IP Address	ASN	Details
81.90.168.82	AS5610 O2 Czech Republic, a.s.	`2.67ms` from Prague, CZ
81.90.173.5	AS5610 O2 Czech Republic, a.s.	`3.51ms` from Prague, CZ
81.90.170.67	AS5610 O2 Czech Republic, a.s.	`2.68ms` 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
20.71.181.4	AS8075 Microsoft Corporation	`0.28ms` from Amsterdam, NL
67.177.79.148	AS7922 Comcast Cable Communications, LLC	`10.94ms` from Atlanta, US
27.252.14.228	AS9500 One New Zealand Group Limited	`1.33ms` from Auckland, NZ
122.163.199.52	AS24560 Bharti Airtel Ltd., Telemedia Services	`9.14ms` from Delhi, IN
119.246.90.116	AS9269 Hong Kong Broadband Network Ltd.	`1.19ms` from Hong Kong, HK
73.77.197.244	AS7922 Comcast Cable Communications, LLC	`5.69ms` from Houston, US
211.213.163.244	AS9318 SK Broadband Co Ltd	`2.38ms` from Incheon, KR
51.219.52.4	AS31655 Gamma Telecom Holdings Ltd	`4.68ms` from London, GB
106.6.21.228	AS4134 CHINANET-BACKBONE	`5.98ms` from Nanchang, CN
54.83.95.244	AS14618 Amazon.com, Inc.	`0.24ms` from Reston, US
71.56.161.148	AS7922 Comcast Cable Communications, LLC	`12.88ms` from Reston, US
91.254.198.228	AS1267 WIND TRE S.P.A.	`8.52ms` from Rome, IT
119.214.235.148	AS4766 Korea Telecom	`1.30ms` from Seoul, KR
220.87.252.52	AS4766 Korea Telecom	`5.25ms` from Seoul, KR
139.219.227.196	AS58593 Shanghai Blue Cloud Technology Co.,Ltd	`2.74ms` from Shanghai, CN
133.114.89.100	AS2527 Sony Network Communications Inc.	`1.52ms` from Tokyo, JP
1.237.212.196	AS9318 SK Broadband Co Ltd	`1.55ms` from Incheon, KR
171.78.187.100	AS24560 Bharti Airtel Ltd., Telemedia Services	`9.45ms` from Kolkata, IN
106.200.123.132	AS45609 Bharti Airtel Ltd. AS for GPRS Service	`0.51ms` from Lohogaon, IN
80.47.180.164	AS13285 TalkTalk Communications Limited	`1.72ms` from London, GB
81.34.160.36	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.11ms` from Madrid, ES
83.254.33.196	AS1257 Tele2 Sverige AB	`7.34ms` from Stockholm, SE
213.230.91.132	AS8193 "Uzbektelekom" Joint Stock Company	`0.81ms` from Tashkent, UZ
111.177.11.52	AS136192 Xiangyang, Hubei Province, P.R.China.	`5.06ms` from Wuhan, CN
47.93.233.68	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.34ms` from Beijing, CN

Traceroute

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

traceroute -a -n -q1 -m6 81.90.163.83

traceroute to 81.90.163.83 (81.90.163.83): 6 hops max, 52 byte packets

1 [AS15169] 142.251.248.129 32.333 ms

2 [AS15169] 192.178.98.38 32.361 ms

3 [AS5610] 194.228.92.84 34.198 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Hamina, FI

On February 7th 2026

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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