Autonomous System details

AS16246

O2 Czech Republic, a.s. · o2.cz

Czechia

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AS16246 – O2 Czech Republic, a.s.

Field	Value
Country	Czechia
Website	o2.cz
Hosted domains	703
IPv4 addresses	133,120
IPv6 addresses	713,053,462,628,379,038,000,000,000,000
ASN type	ISP
Registry	ripe
Allocated	23 years ago on Oct 21, 2003
Updated	2 years ago on Jun 20, 2024

Netblock	Company	Num of IPs
188.175.0.0/16	O2 Czech Republic, a.s.	65,536
94.74.192.0/18	O2 Czech Republic, a.s.	16,384
82.150.160.0/19	O2 Czech Republic, a.s.	8,192
86.63.192.0/19	O2 Czech Republic, a.s.	8,192
92.240.160.0/19	O2 Czech Republic, a.s.	8,192
213.180.32.0/19	O2 Czech Republic, a.s.	8,192
95.143.128.0/20	O2 Czech Republic, a.s.	4,096
176.98.96.0/20	O2 Czech Republic, a.s.	4,096
178.17.96.0/20	O2 Czech Republic, a.s.	4,096
77.87.232.0/21	CATR	2,048
78.108.152.0/21	Assignment for PorubaNET's FO customers	2,048
91.197.116.0/22	CATR	1,024
185.15.252.0/22	O2 Czech Republic, a.s.	1,024

Netblock	Company
2a02:350::/29	O2 Czech Republic, a.s.
2a03:b4c0::/32	O2 Czech Republic, a.s.

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WHOIS Details

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                                                ASHandle:       AS16246
                                                OrgID:          AS16246
                                                ASName:         AS16246
                                                ASNumber:       AS16246
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 703 domain names hosted across 211 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
188.175.126.28	██████████	35
82.150.165.218	██████████	33
94.74.229.44	██████████	30
188.175.30.5	██████████	28
94.74.194.116	██████████	27
213.180.34.211	██████████	27
213.180.35.58	██████████	20
94.74.222.181	██████████	18
94.74.220.5	██████████	16
185.15.252.1	██████████	14

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Peers

There are 14 peers for this ASN.

Peers	Name
AS12570	O2 Czech Republic, a.s.
AS197197	CETIN a.s.
AS202657	Pavel Jochim
AS207015	Position s.r.o.
AS212315	Frantisek Toman
AS29321	O2 Czech Republic, a.s.
AS31246	NETBOX Autonomous system
AS39736	ICT Support, s.r.o.
AS41046	O2 Czech Republic, a.s.
AS44070	O2 Czech Republic, a.s.
AS47681	O2 Czech Republic, a.s.
AS49767	O2 Czech Republic, a.s.
AS5610	O2 Czech Republic, a.s.
AS62178	MASTER IT Technologies, a.s.

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ASN API & Database

Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS5610	O2 Czech Republic, a.s.

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Downstreams

There are 13 downstreams for this ASN.

Downstreams	Name
AS12570	O2 Czech Republic, a.s.
AS197197	CETIN a.s.
AS202657	Pavel Jochim
AS207015	Position s.r.o.
AS212315	Frantisek Toman
AS29321	O2 Czech Republic, a.s.
AS31246	NETBOX Autonomous system
AS39736	ICT Support, s.r.o.
AS41046	O2 Czech Republic, a.s.
AS44070	O2 Czech Republic, a.s.
AS47681	O2 Czech Republic, a.s.
AS49767	O2 Czech Republic, a.s.
AS62178	MASTER IT Technologies, a.s.

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ASN API & Database

Pingable IPs

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

IP Address	ASN	Details
188.175.167.129	AS16246 O2 Czech Republic, a.s.	`9.26ms` from Brno, CZ
188.175.42.70	AS16246 O2 Czech Republic, a.s.	`9.06ms` from Brno, CZ
188.175.13.136	AS16246 O2 Czech Republic, a.s.	`9.05ms` from Brno, CZ
188.175.22.18	AS16246 O2 Czech Republic, a.s.	`9.08ms` from Brno, CZ
188.175.115.130	AS16246 O2 Czech Republic, a.s.	`2.28ms` from Prague, CZ
95.143.133.1	AS16246 O2 Czech Republic, a.s.	`3.39ms` from Prague, CZ
94.74.202.138	AS16246 O2 Czech Republic, a.s.	`2.20ms` from Prague, CZ
188.175.194.1	AS16246 O2 Czech Republic, a.s.	`0.95ms` from Prague, CZ
94.74.208.172	AS16246 O2 Czech Republic, a.s.	`10.73ms` from Prague, CZ
188.175.155.190	AS16246 O2 Czech Republic, a.s.	`9.72ms` from Prague, CZ
188.175.143.1	AS16246 O2 Czech Republic, a.s.	`8.03ms` from Prague, CZ
94.74.207.15	AS16246 O2 Czech Republic, a.s.	`5.64ms` from Prague, CZ
213.180.36.164	AS16246 O2 Czech Republic, a.s.	`2.87ms` from Prague, CZ
188.175.170.35	AS16246 O2 Czech Republic, a.s.	`8.29ms` from Prague, CZ
188.175.94.1	AS16246 O2 Czech Republic, a.s.	`14.66ms` from Prague, CZ
178.17.103.193	AS16246 O2 Czech Republic, a.s.	`6.26ms` from Prague, CZ
188.175.188.1	AS16246 O2 Czech Republic, a.s.	`14.96ms` from Prague, CZ
92.240.165.11	AS16246 O2 Czech Republic, a.s.	`3.39ms` from Prague, CZ
92.240.163.42	AS16246 O2 Czech Republic, a.s.	`3.54ms` from Prague, CZ
188.175.159.18	AS16246 O2 Czech Republic, a.s.	`9.72ms` from Prague, CZ
82.150.164.45	AS16246 O2 Czech Republic, a.s.	`1.57ms` from Prague, CZ
82.150.168.1	AS16246 O2 Czech Republic, a.s.	`5.46ms` from Prague, CZ
188.175.168.211	AS16246 O2 Czech Republic, a.s.	`8.27ms` from Prague, CZ
188.175.83.13	AS16246 O2 Czech Republic, a.s.	`6.67ms` from Brno, CZ
188.175.17.65	AS16246 O2 Czech Republic, a.s.	`8.95ms` from Brno, 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
107.213.253.198	AS7018 AT&T Enterprises, LLC	`2.98ms` from Dallas, US
109.147.140.70	AS2856 British Telecommunications PLC	`4.97ms` from Erith, GB
183.6.48.214	AS4134 CHINANET BACKBONE	`2.52ms` from Guangzhou, CN
98.194.137.22	AS7922 Comcast Cable Communications, LLC	`7.51ms` from Houston, US
194.73.86.198	AS2856 British Telecommunications PLC	`2.72ms` from London, GB
195.167.135.54	AS5631 Telcom Networks Limited	`0.57ms` from London, GB
85.210.40.86	AS8075 Microsoft Corporation	`0.23ms` from London, GB
174.177.120.70	AS7922 Comcast Cable Communications, LLC	`13.69ms` from Murfreesboro, US
180.220.115.6	AS9617 JCOM Co., Ltd.	`13.33ms` from Osaka, JP
78.196.110.182	AS12322 Free SAS	`1.22ms` from Paris, FR
41.142.55.198	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`4.38ms` from Rabat, MA
34.142.214.6	AS396982 Google LLC	`0.16ms` from Singapore, SG
142.113.218.198	AS577 Bell Canada	`1.95ms` from Toronto, CA
185.197.237.22	AS211941 UnternehmerTUM GmbH	`6.44ms` from Vienna, AT
45.92.243.6	AS200999 CloudFerro S.A	`0.09ms` from Warsaw, PL
186.89.44.102	AS8048 CANTV Servicios, Venezuela	`15.73ms` from Willemstad, CW
188.142.52.214	AS1136 KPN B.V.	`3.08ms` from Amsterdam, NL
75.191.108.22	AS11426 Charter Communications Inc	`13.66ms` from Ashburn, US
101.27.148.70	AS4837 CHINA UNICOM China169 Backbone	`9.13ms` from Beijing, CN
75.198.34.214	AS6167 Verizon Business	`14.55ms` from Chicago, US
72.181.213.150	AS11427 Charter Communications Inc	`5.36ms` from Dallas, US
141.216.89.230	AS394769 University of Michigan - Flint	`2.26ms` from Detroit, US
54.246.57.134	AS16509 Amazon.com, Inc.	`0.43ms` from Dublin, IE
78.153.64.6	AS12759 Stephan Fuss trading as SoftCom Datensysteme	`0.52ms` from Duesseldorf, DE
135.225.181.150	AS8075 Microsoft Corporation	`0.20ms` from Gaevle, SE

Traceroute

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

traceroute -a -n -q1 -f3 188.175.31.176

traceroute to 188.175.31.176 (188.175.31.176): 64 hops max, 52 byte packets

3 [AS12570] 212.96.178.177 1.418 ms

4 [AS16246] 94.74.231.253 5.145 ms

5 [AS16246] 188.175.255.124 15.75 ms

6 *

7 [AS16246] 188.175.255.203 18.616 ms

8 [AS16246] 188.175.0.42 9.96 ms

9 [AS16246] 188.175.31.176 9.195 ms

Measurement taken from

IPinfo ProbeNet in Brno, CZ

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 AS16246 at robtex.

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