Autonomous System details

AS5610

O2 Czech Republic, a.s. · o2.cz

Czechia

Major ISP

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AS5610 – O2 Czech Republic, a.s.

Field	Value
Country	Czechia
Website	o2.cz
Hosted domains	7,689
IPv4 addresses	1,542,400
IPv6 addresses	950,739,159,096,991,670,629,200,000,000
ASN type	ISP
Registry	ripe
Allocated	24 years ago on Jul 22, 2002
Updated	2 years ago on Jun 12, 2024

Netblock	Company	Num of IPs
88.100.0.0/14	O2 Czech Republic, a.s.	262,144
90.180.0.0/14	O2 Czech Republic, a.s.	262,144
85.70.0.0/15	O2 Czech Republic, a.s.	131,072
85.160.0.0/15	O2 Czech Republic, a.s.	131,072
88.100.0.0/15	O2 Czech Republic, a.s.	131,072
90.178.0.0/15	O2 Czech Republic, a.s.	131,072
109.80.0.0/15	O2 Czech Republic, a.s.	131,072
80.188.0.0/16	O2 Czech Republic, a.s.	65,536
83.208.0.0/16	O2 Czech Republic, a.s.	65,536
85.70.0.0/16	O2 Czech Republic, a.s.	65,536
85.71.0.0/16	O2 Czech Republic, a.s.	65,536
88.102.0.0/16	O2 Czech Republic, a.s.	65,536
90.177.0.0/16	O2 Czech Republic, a.s.	65,536
90.181.0.0/16	O2 Czech Republic, a.s.	65,536
90.182.0.0/16	O2 Czech Republic, a.s.	65,536
90.183.0.0/16	O2 Czech Republic, a.s.	65,536
160.218.0.0/16	O2 Czech Republic, a.s.	65,536
194.228.0.0/16	O2 Czech Republic, a.s.	65,536
37.188.128.0/17	O2 Czech Republic, a.s.	32,768
80.188.0.0/17	O2 Czech Republic, a.s.	32,768
80.188.128.0/17	O2 Czech Republic, a.s.	32,768
85.70.0.0/17	O2 Czech Republic, a.s.	32,768
85.70.128.0/17	O2 Czech Republic, a.s.	32,768
90.176.128.0/17	O2 Czech Republic, a.s.	32,768
194.228.0.0/17	O2 Czech Republic, a.s.	32,768
194.228.128.0/17	O2 Czech Republic, a.s.	32,768
83.208.0.0/18	O2 Czech Republic, a.s.	16,384
83.208.64.0/18	O2 Czech Republic, a.s.	16,384
85.193.0.0/18	O2 Czech Republic, a.s.	16,384
90.176.64.0/18	O2 Czech Republic, a.s.	16,384
91.191.64.0/18	CETIN Networks, s.r.o.	16,384
83.69.32.0/19	O2 Czech Republic, a.s.	8,192
83.208.128.0/19	O2 Czech Republic, a.s.	8,192
85.71.224.0/19	O2 Czech Republic, a.s.	8,192
88.83.160.0/19	O2 Czech Republic, a.s.	8,192
90.176.32.0/19	XDSL NETWORK-ADSL	8,192
92.243.192.0/19	O2 Czech Republic, a.s.	8,192
81.90.160.0/20	O2 Czech Republic, a.s.	4,096
109.81.112.0/20	O2 Czech Republic, a.s.	4,096
109.81.160.0/20	O2 Czech Republic, a.s.	4,096
217.117.208.0/20	O2 Czech Republic, a.s.	4,096
217.194.160.0/20	O2 Czech Republic, a.s.	4,096
81.90.168.0/21	O2 Czech Republic, a.s.	2,048
83.208.220.0/22	O2 Czech Republic, a.s.	1,024
91.193.132.0/22	Burza cennych papiru Praha, a.s.	1,024
185.61.228.0/22	O2 Czech Republic, a.s.	1,024
185.143.112.0/22	K-net Technical International Group, s.r.o.	1,024
193.84.12.0/22	Frenstat p.R.	1,024
194.228.72.0/22	Internet for school	1,024
193.84.12.0/23	Frenstat p.R.	512
193.84.14.0/23	Frenstat p.R.	512
194.50.248.0/23	Banka CREDITAS a.s	512
5.23.39.0/24	Gi Group Holding S.p.A	256
80.188.40.0/24	KOROZLUKY 1	256
80.188.222.0/24	DUKELSKYCHHRDINU	256
81.90.168.0/24	Elsat spol. s r.o.	256
81.90.170.0/24	Elsat spol. s r.o.	256
81.90.173.0/24	Elsat spol. s r.o.	256
88.83.175.0/24	Elsat spol. s r.o.	256
90.176.170.0/24	XDSL NETWORK-ADSL	256
90.182.108.0/24	O2 Czech Republic, a.s.	256
91.213.10.0/24	CGI IT Czech Republic s.r.o.	256
91.232.82.0/24	ABIS Czech, a.s.	256
161.195.144.0/24	Aramark Services, Inc.	256
193.17.13.0/24	Enterprise Services France SAS	256
194.165.47.0/24	Ing. Jiri Orsag, CSc.	256
195.5.186.0/24	Agrofert JSC	256

Netblock	Company
2a00:1028::/29	O2 Czech Republic, a.s.
2a02:9b8::/31	O2 Czech Republic, a.s.
2001:41d8::/32	O2 Czech Republic, a.s.
2a00:1028::/32	O2 Czech Republic, a.s.
2001:67c:dd4::/48	ITIXO s.r.o.

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WHOIS Details

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                                                ASHandle:       AS5610
                                                OrgID:          AS5610
                                                ASName:         AS5610
                                                ASNumber:       AS5610
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 7,689 domain names hosted across 2,004 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
90.183.125.35	██████████	217
90.182.39.34	██████████	175
194.228.93.211	██████████	159
160.218.161.165	██████████	146
194.228.235.215	███████	136
90.182.205.206	██████████	119
160.218.161.162	███████	117
80.188.239.11	██████████	95
90.182.39.46	██████████	94
194.228.93.212	█████████	82

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Hosted Domains API & Database

Peers

There are 77 peers for this ASN.

Peers	Name
AS1239	Cogent Communications, LLC
AS1299	Arelion Sweden AB
AS13105	INFORM LLC
AS14840	BR.Digital Telecom
AS15380	Air Navigation Services of the Czech Republic, state enterprise
AS15935	ha-vel internet s.r.o.
AS16019	Vodafone Czech Republic a.s.
AS16246	O2 Czech Republic, a.s.
AS174	Cogent Communications, LLC
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS197353	NN Management Services, s.r.o.
AS197920	SKODA ICT s.r.o.
AS198101	Kooperativa pojistovna, a.s., Vienna Insurance Group
AS198150	SIACOM JSC
AS198282	CAH Building s.r.o.
AS198605	Gen Digital dba as Avast
AS198991	TV Nova sro
AS199059	Maurice Ward & Co., s.r.o.
AS199490	INTERCONNECT s.r.o.
AS201163	Komercni banka, a.s.
AS202297	Skylon Solutions Limited
AS203411	FORTUNA GAME a.s.
AS204172	TTC TELEKOMUNIKACE s.r.o.
AS204372	PPF banka a.s.
AS204907	Air Bank a.s.
AS205233	KBC GLOBAL SERVICES NV
AS206613	Tipsport.net a.s.
AS206683	Moravskoslezske inovacni centrum Ostrava, a.s.
AS208712	CENDIS, s.p.
AS208906	SYNOT ICT Services, a.s.
AS208950	Ezpada s.r.o
AS211274	Quadruple a.s.
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
AS21241	Global Payments Europe, s.r.o.
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS215711	The Ministry of Agriculture of the Czech Republic
AS21942	ON SEMICONDUCTOR
AS22356	Durand do Brasil Ltda
AS24482	SG.GS
AS24940	Hetzner Online GmbH
AS25321	Brink's Cash Solutions (CZ), a.s.
AS2571	DHL Information Services (Europe) s.r.o
AS263444	Open X Tecnologia Ltda
AS2852	CESNET z.s.p.o.
AS28952	O2 Business Services, a.s
AS29504	Freenet Liberec, z.s.
AS32590	Valve Corporation
AS33891	Core-Backbone GmbH
AS35096	Alef Nula a.s.
AS36236	NetActuate, Inc
AS38952	MAFRA, a.s.
AS39120	Convergenze S.p.A.
AS39392	SH.cz s.r.o.
AS39453	Ustav zdravotnickych informaci a statistiky Ceske republiky
AS40994	Hohl IT e.U.
AS42908	ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS43037	Seznam.cz, a.s.
AS43733	Viva Armenia CJSC
AS43757	ICZ a.s.
AS43866	Altron a.s.
AS4455	IX Reach Ltd
AS47232	ISP Alliance a.s.
AS48451	Prazska energetika, a.s.
AS49544	i3D.net B.V
AS49580	Monet +, a.s.
AS50948	AMDOCS (UK) LIMITED
AS57463	NetIX Communications JSC
AS59747	NIX.CZ z.s.p.o.
AS60068	Datacamp Limited
AS6204	INTERKVM HOST SRL
AS62083	Fio banka, a.s.
AS6461	Zayo Bandwidth
AS6663	Euroweb Romania S.R.L.
AS6881	NIX.CZ z.s.p.o.
AS6939	Hurricane Electric LLC
AS8218	Zayo Infrastructure France SA
AS8220	COLT Technology Services Group Limited

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ASN API & Database

Upstreams

There are 4 upstreams for this ASN.

upstreams	Name
AS1299	Arelion Sweden AB
AS174	Cogent Communications, LLC
AS6461	Zayo Bandwidth
AS6939	Hurricane Electric LLC

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ASN API & Database

Downstreams

There are 37 downstreams for this ASN.

Downstreams	Name
AS13105	INFORM LLC
AS15380	Air Navigation Services of the Czech Republic, state enterprise
AS16246	O2 Czech Republic, a.s.
AS197353	NN Management Services, s.r.o.
AS197920	SKODA ICT s.r.o.
AS198282	CAH Building s.r.o.
AS198605	Gen Digital dba as Avast
AS198991	TV Nova sro
AS199059	Maurice Ward & Co., s.r.o.
AS201163	Komercni banka, a.s.
AS203411	FORTUNA GAME a.s.
AS204172	TTC TELEKOMUNIKACE s.r.o.
AS204372	PPF banka a.s.
AS204907	Air Bank a.s.
AS205233	KBC GLOBAL SERVICES NV
AS206613	Tipsport.net a.s.
AS206683	Moravskoslezske inovacni centrum Ostrava, a.s.
AS208712	CENDIS, s.p.
AS208906	SYNOT ICT Services, a.s.
AS208950	Ezpada s.r.o
AS211274	Quadruple a.s.
AS21241	Global Payments Europe, s.r.o.
AS215711	The Ministry of Agriculture of the Czech Republic
AS21942	ON SEMICONDUCTOR
AS25321	Brink's Cash Solutions (CZ), a.s.
AS2571	DHL Information Services (Europe) s.r.o
AS28952	O2 Business Services, a.s
AS35096	Alef Nula a.s.
AS38952	MAFRA, a.s.
AS39453	Ustav zdravotnickych informaci a statistiky Ceske republiky
AS42908	ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS43037	Seznam.cz, a.s.
AS43757	ICZ a.s.
AS43866	Altron a.s.
AS49580	Monet +, a.s.
AS59747	NIX.CZ z.s.p.o.
AS62083	Fio banka, a.s.

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ASN API & Database

Pingable IPs

3,111 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
90.181.22.240	AS5610 O2 Czech Republic, a.s.	`4.85ms` from Prague, CZ
90.181.223.142	AS5610 O2 Czech Republic, a.s.	`0.78ms` from Prague, CZ
85.70.218.163	AS5610 O2 Czech Republic, a.s.	`1.27ms` from Prague, CZ
90.182.128.38	AS5610 O2 Czech Republic, a.s.	`0.94ms` from Prague, CZ
2a00:1028:83b2:4e5c:a9d7:7e50:f241:b12e	AS5610 O2 Czech Republic, a.s.	`2.81ms` from Prague, CZ
88.100.163.57	AS5610 O2 Czech Republic, a.s.	`7.65ms` from Prague, CZ
90.183.50.197	AS5610 O2 Czech Republic, a.s.	`0.88ms` from Prague, CZ
80.188.253.48	AS5610 O2 Czech Republic, a.s.	`1.39ms` from Prague, CZ
90.180.137.119	AS5610 O2 Czech Republic, a.s.	`5.86ms` from Prague, CZ
109.80.133.88	AS5610 O2 Czech Republic, a.s.	`5.91ms` from Prague, CZ
88.102.37.61	AS5610 O2 Czech Republic, a.s.	`2.77ms` from Prague, CZ
194.228.250.217	AS5610 O2 Czech Republic, a.s.	`1.13ms` from Prague, CZ
194.228.229.11	AS5610 O2 Czech Republic, a.s.	`0.56ms` from Prague, CZ
90.183.153.241	AS5610 O2 Czech Republic, a.s.	`1.77ms` from Prague, CZ
90.181.228.235	AS5610 O2 Czech Republic, a.s.	`7.62ms` from Prague, CZ
90.180.68.200	AS5610 O2 Czech Republic, a.s.	`4.80ms` from Prague, CZ
2a00:1028:c000:1c41:1afd:74ff:fe8b:7b10	AS5610 O2 Czech Republic, a.s.	`1.23ms` from Prague, CZ
88.100.17.103	AS5610 O2 Czech Republic, a.s.	`2.89ms` from Prague, CZ
90.179.113.238	AS5610 O2 Czech Republic, a.s.	`5.52ms` from Prague, CZ
85.71.197.140	AS5610 O2 Czech Republic, a.s.	`10.17ms` from Prague, CZ
88.100.150.5	AS5610 O2 Czech Republic, a.s.	`1.07ms` from Prague, CZ
88.103.127.50	AS5610 O2 Czech Republic, a.s.	`7.36ms` from Prague, CZ
85.70.199.211	AS5610 O2 Czech Republic, a.s.	`4.46ms` from Prague, CZ
90.181.73.171	AS5610 O2 Czech Republic, a.s.	`6.55ms` from Prague, CZ
194.228.7.85	AS5610 O2 Czech Republic, a.s.	`0.93ms` 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
105.105.104.26	AS36947 Telecom Algeria	`14.38ms` from Algiers, DZ
188.4.104.234	AS1241 Forthnet	`12.24ms` from Athens, GR
108.231.68.58	AS7018 AT&T Enterprises, LLC	`15.11ms` from Atlanta, US
188.225.52.90	AS28840 PJSC "TATTELECOM"	`13.32ms` from Chelyabinsk, RU
174.105.229.122	AS10796 Charter Communications Inc	`6.23ms` from Columbus, US
109.57.91.218	AS44034 Hi3G Access AB	`10.28ms` from Copenhagen, DK
187.69.172.202	AS22085 Claro S/A	`14.53ms` from Curitiba, BR
90.129.242.74	AS1257 Tele2 Sverige AB	`1.10ms` from Goeteborg, SE
14.182.105.154	AS45899 VNPT Corp	`3.41ms` from Hanoi, VN
116.104.128.42	AS7552 Viettel Group	`2.27ms` from Hanoi, VN
113.254.93.250	AS9304 HGC Global Communications Limited	`1.46ms` from Hong Kong, HK
84.71.25.10	AS5378 Vodafone Limited	`4.32ms` from London, GB
79.147.6.218	AS3352 TELEFONICA DE ESPANA S.A.U.	`14.24ms` from Madrid, ES
157.250.33.250	AS53306 OUTSCALE INC	`0.71ms` from New York City, US
82.61.102.90	AS3269 Telecom Italia S.p.A.	`4.56ms` from Rome, IT
24.176.226.234	AS20115 Charter Communications LLC	`8.17ms` from San Jose, US
174.7.122.42	AS6327 Shaw Communications	`7.21ms` from Seattle, US
61.76.174.154	AS4766 Korea Telecom	`6.92ms` from Seoul, KR
121.161.121.202	AS4766 Korea Telecom	`1.87ms` from Seoul, KR
101.91.168.10	AS4811 China Telecom (Group)	`3.33ms` from Shanghai, CN
174.86.54.106	AS20115 Charter Communications LLC	`3.57ms` from St. Louis, US
153.213.9.90	AS4713 NTT DOCOMO BUSINESS,Inc.	`9.37ms` from Tokyo, JP
46.249.176.154	AS25406 SPLIUS, UAB	`3.24ms` from Vilnius, LT
187.127.246.170	AS47583 Hostinger International Limited	`0.18ms` from Vilnius, LT
98.236.85.186	AS7922 Comcast Cable Communications, LLC	`9.89ms` from Ashburn, US

Traceroute

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

traceroute -a -n -q1 -m13 85.160.55.29

traceroute to 85.160.55.29 (85.160.55.29): 13 hops max, 52 byte packets

1 [AS16276] 141.227.131.3 1.464 ms

2 *

3 *

4 *

5 *

6 [AS16276] 54.36.50.245 14.932 ms

7 [AS16276] 54.36.50.242 22.298 ms

8 *

9 *

10 [AS5610] 194.228.21.200 34.105 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Amsterdam, NL

On April 13th 2026

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS5610 at robtex.

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