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
81.90.64.0/20	AS15830	Equinix (Finland) Oy	4,096
81.90.128.0/20	AS25048	DSNET Ltd	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
81.90.48.0/20	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
81.90.16.0/20	AS48407	TigrisNet	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
81.90.134.0/24	AS48901	Office	256
81.90.136.0/24	AS48901	Office	256
81.90.191.0/24	AS199967	Think Huge Ltd	256
81.90.30.0/24	AS201664	NetWarm LTD	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
81.90.137.0/24	AS48901	Office	256
81.90.133.0/24	AS25048	DSNet Ltd	256
81.90.237.0/24	AS25071	ISP RadioCom	256
81.90.190.0/24	AS9009	Think Huge Ltd	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.sk	27
81.90.160.100	nemovitosti-hradeckralove.cz	8
81.90.160.107	pouzitekompresory.cz	3
81.90.161.226	veverkovic.cz	2
81.90.160.97	pronajem-hradec.cz	2
81.90.173.70	ivyimy.cz	1
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

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

IP Address	ASN	Details
81.90.168.17	AS5610 O2 Czech Republic, a.s.	`2.67ms` from Prague, CZ
81.90.173.5	AS5610 O2 Czech Republic, a.s.	`3.50ms` 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
65.48.113.20	AS40911 L2Networks Corp.	`10.32ms` from Atlanta, US
36.68.107.100	AS7713 PT Telekomunikasi Indonesia	`17.96ms` from Batam, ID
91.12.158.180	AS3320 Deutsche Telekom AG	`5.49ms` from Berlin, DE
91.208.178.4	AS47848 NEXENT BANK N.V.	`0.62ms` from Bucharest, RO
41.236.239.180	AS8452 TE-AS	`9.86ms` from Cairo, EG
79.206.129.212	AS3320 Deutsche Telekom AG	`2.54ms` from Duesseldorf, DE
174.3.123.36	AS6327 Shaw Communications	`4.19ms` from Edmonton, CA
74.141.231.20	AS10796 Charter Communications Inc	`16.56ms` from Flint, US
192.193.116.100	AS1696 Citigroup Inc.	`0.85ms` from Frankfurt am Main, DE
47.238.222.164	AS45102 Alibaba (US) Technology Co., Ltd.	`0.50ms` from Hong Kong, HK
119.246.90.116	AS9269 Hong Kong Broadband Network Ltd.	`1.16ms` from Hong Kong, HK
197.65.48.36	AS16637 MTN SA	`19.34ms` from Johannesburg, ZA
178.150.73.180	AS13188 CONTENT DELIVERY NETWORK LTD	`0.91ms` from Kyiv, UA
154.118.114.20	AS37340 SPECTRANET LIMITED	`9.56ms` from Lagos, NG
45.51.143.52	AS20001 Charter Communications Inc	`7.46ms` from Los Angeles, US
5.205.245.36	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.41ms` from Madrid, ES
90.113.229.84	AS3215 Orange S.A.	`12.13ms` from Marseille, FR
41.139.227.244	AS37061 Safaricom Limited	`6.99ms` from Nairobi, KE
84.190.22.100	AS3320 Deutsche Telekom AG	`3.81ms` from Nuernberg, DE
42.150.79.20	AS9824 JCOM Co., Ltd.	`17.87ms` from Osaka, JP
176.160.109.36	AS5410 Bouygues Telecom SA	`3.34ms` from Paris, FR
160.202.159.180	AS208808 Enegan S.p.A.	`1.99ms` from Rome, IT
178.45.234.244	AS12389 PJSC Rostelecom	`8.54ms` from Samara, RU
104.134.161.212	AS395973 Google LLC	`1.19ms` from San Jose, US
200.212.144.20	AS4230 CLARO S.A.	`0.78ms` from Sao Paulo, BR

Traceroute

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

traceroute -a -n -q1 -m6 81.90.172.60

traceroute to 81.90.172.60 (81.90.172.60): 6 hops max, 52 byte packets

1 [AS15169] 142.251.248.129 153.385 ms

2 [AS15169] 192.178.98.110 152 ms

3 [AS5610] 194.228.92.84 157.135 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Las Vegas, US

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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