212.4.128.0/19

AS12570 · O2 Czech Republic, a.s.

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Summary

Country	Czechia
Domain	o2.cz
ASN	AS12570
Registry	RIPE
ID	CZ-CZNET-20080611

WHOIS Details

inetnum:        212.4.128.0 - 212.4.159.255
netname:        CZ-CZNET-20080611
org:            ORG-STaN1-RIPE
country:        CZ
admin-c:        CZO2-RIPE
tech-c:         CZO2-RIPE
status:         ALLOCATED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS5610-MTN
created:        2008-06-11T13:41:00Z
last-modified:  2024-06-20T15:31:29Z
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
abuse-email:    abuse@o2.cz
abuse-c:        AR14410-RIPE
abuse-org:      undefined

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

route:          212.4.128.0/19
descr:          ITSELF
origin:         AS12570
mnt-by:         MNET-IP-MNT
remarks:        Please report abuse -> abuse@selfnet.cz
created:        2008-06-20T07:26:08Z
last-modified:  2018-09-27T08:30:09Z
source:         RIPE

Overlapping Ranges

BGP prefixes that are contained by 212.4.128.0/19

Range	ASN	Company	Num of IPs
212.4.132.0/24	AS51424	SPERLNET s.r.o.	256
212.4.142.0/23	AS56566	SATT a.s.	512

Nearby Ranges

BGP prefixes that overlap with 212.4.0.0/16

Range	ASN	Company	Num of IPs
212.4.224.0/19	AS12665	MSH Medien System Haus GmbH & Co. KG	8,192
212.4.160.0/19	AS20676	Plusnet GmbH	8,192
212.4.32.0/19	AS2119	Telenor Norge AS	8,192
212.4.96.0/19	AS29231	Grupalia Internet S.A.	8,192
212.4.0.0/19	AS702	Verizon Italia SpA	8,192
212.4.64.0/19	AS8821	WWZ Telekom AG	8,192
212.4.192.0/19	AS8918	Coolwave Communications Limited	8,192
212.4.240.0/22	AS16509	MSH Medien System Haus GmbH & Co. KG	1,024
212.4.142.0/23	AS56566	SATT a.s.	512
212.4.27.0/24	AS16509	Verizon Italia SpA	256
212.4.132.0/24	AS51424	SPERLNET s.r.o.	256
212.4.110.0/24	AS29231	Grupalia Network	256
212.4.195.0/24	AS8918	Coolwave Communications Limited	256

Hosted domains

There are 682 domain names hosted across 94 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
212.4.158.38	aaazvirata.cz	105
212.4.158.101	brezi-eu.cz	50
212.4.158.48	airgas.cz	42
212.4.153.212	obchodled.cz	30
212.4.138.244	i-dvirka.cz	25
212.4.158.57	svatbavzahranici.eu	24
212.4.158.60	gedwizard.cz	24
212.4.158.46	svatbavcizine.cz	20
212.4.158.42	lsbyc.cz	19
212.4.158.36	keep-it-fine.com	19
212.4.153.244	therat.cz	19
212.4.158.231	pozarniochranabrno.cz	17
212.4.153.241	brennholzhevlin.at	15
212.4.158.49	nibowaka.net	14
212.4.136.153	hispanicobrand.com	13
212.4.158.53	svatba-v-keni.cz	13
212.4.153.213	chatakrasne.cz	11
212.4.138.26	brnobankrot.cz	10
212.4.133.188	vojtahoralek.eu	9
212.4.158.55	sedmihlavasan.cz	9

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

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

IP Address	ASN	Details
212.4.131.114	AS12570 O2 Czech Republic, a.s.	`4.59ms` from Brno, CZ
212.4.153.1	AS12570 O2 Czech Republic, a.s.	`0.78ms` from Brno, CZ
212.4.132.124	AS51424 Jiri Sperl	`3.46ms` from Prague, CZ
212.4.139.2	AS12570 O2 Czech Republic, a.s.	`1.56ms` from Brno, CZ
212.4.134.1	AS12570 O2 Czech Republic, a.s.	`0.89ms` from Brno, CZ
212.4.156.222	AS12570 O2 Czech Republic, a.s.	`1.16ms` from Brno, CZ
212.4.130.1	AS12570 O2 Czech Republic, a.s.	`1.45ms` from Brno, CZ
212.4.158.2	AS12570 O2 Czech Republic, a.s.	`0.94ms` from Brno, CZ
212.4.142.66	AS56566 SATT a.s.	`7.69ms` from Prague, CZ
212.4.129.21	AS12570 O2 Czech Republic, a.s.	`7.11ms` from Brno, CZ
212.4.151.172	AS12570 O2 Czech Republic, a.s.	`7.21ms` from Brno, CZ
212.4.138.129	AS12570 O2 Czech Republic, a.s.	`1.02ms` from Brno, CZ
212.4.133.1	AS12570 O2 Czech Republic, a.s.	`2.96ms` from Brno, CZ
212.4.154.1	AS12570 O2 Czech Republic, a.s.	`2.50ms` from Brno, CZ
212.4.136.102	AS12570 O2 Czech Republic, a.s.	`0.94ms` from Brno, CZ
212.4.155.137	AS12570 O2 Czech Republic, a.s.	`3.14ms` from Brno, CZ
212.4.152.140	AS12570 O2 Czech Republic, a.s.	`0.12ms` from Brno, CZ
212.4.148.1	AS12570 O2 Czech Republic, a.s.	`2.04ms` from Brno, CZ
212.4.128.1	AS12570 O2 Czech Republic, a.s.	`0.86ms` from Brno, CZ
212.4.144.1	AS12570 O2 Czech Republic, a.s.	`3.25ms` from Brno, CZ
212.4.137.25	AS12570 O2 Czech Republic, a.s.	`2.95ms` from Brno, CZ
212.4.150.1	AS12570 O2 Czech Republic, a.s.	`0.87ms` from Brno, CZ
212.4.157.50	AS12570 O2 Czech Republic, a.s.	`1.46ms` from Brno, CZ
212.4.135.9	AS12570 O2 Czech Republic, a.s.	`7.40ms` from Brno, CZ
212.4.143.129	AS56566 SATT a.s.	`7.68ms` 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
98.64.168.243	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
50.85.13.35	AS8075 Microsoft Corporation	`0.31ms` from Amsterdam, NL
58.31.252.67	AS17429 BEIJING GEHUA CATV NETWORK CO.LTD	`7.44ms` from Beijing, CN
94.44.50.35	AS21334 One Hungary Ltd.	`15.36ms` from Budapest, HU
194.47.18.19	AS1653 Vetenskapsradet / SUNET	`4.92ms` from Copenhagen, DK
68.71.121.3	AS25674 Lingo Telecom, LLC	`0.95ms` from Dallas, US
78.143.157.35	AS31122 Digiweb ltd	`4.15ms` from Dublin, IE
72.240.103.163	AS13490 Buckeye Cablevision, Inc.	`9.32ms` from Flint, US
149.202.4.243	AS16276 OVH SAS	`0.08ms` from Gravelines, FR
51.92.185.35	AS16509 Amazon.com, Inc.	`6.22ms` from Madrid, ES
73.244.223.83	AS7922 Comcast Cable Communications, LLC	`4.61ms` from Miami, US
73.0.109.51	AS7922 Comcast Cable Communications, LLC	`2.81ms` from Miami, US
62.35.13.243	AS5410 Bouygues Telecom SA	`3.72ms` from Paris, FR
177.70.78.3	AS262544 RazaoInfo Internet Ltda	`6.63ms` from Porto Alegre, BR
52.1.249.211	AS14618 Amazon.com, Inc.	`0.23ms` from Reston, US
211.244.83.115	AS9318 SK Broadband Co Ltd	`1.52ms` from Seoul, KR
86.59.107.131	AS8437 Hutchison Drei Austria GmbH	`1.97ms` from Vienna, AT
111.175.97.115	AS4134 CHINANET-BACKBONE	`1.23ms` from Wuhan, CN
39.164.60.35	AS24445 Henan Mobile Communications Co.,Ltd	`6.66ms` from Zhengzhou, CN
109.177.32.115	AS5384 Emirates Internet	`2.77ms` from Al Fujairah City, AE
92.253.40.3	AS8376 Jordan Data Communications Company LLC	`0.93ms` from Amman, JO
89.245.63.51	AS8881 1&1 Versatel GmbH	`8.72ms` from Berlin, DE
181.32.122.243	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`11.52ms` from Bogota, CO
186.132.124.51	AS22927 Telefonica de Argentina	`1.86ms` from Buenos Aires, AR
97.243.232.131	AS6167 Verizon Business	`18.77ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 -f5 212.4.132.84

traceroute to 212.4.132.84 (212.4.132.84): 64 hops max, 52 byte packets

5 [AS5610] 90.182.199.93 0.975 ms

6 *

7 [AS41046] 81.200.48.214 0.87 ms

8 [AS16246] 94.74.231.206 0.705 ms

9 [AS12570] 212.96.178.13 1.646 ms

10 [AS204064] 185.201.15.90 3.715 ms

11 *

12 *

13 [AS51424] 212.4.132.84 4.27 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On February 7th 2026

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