178.17.80.0/20

AS42908 · ORIGINAL AS CZ-NORDICTELECOMREGIONAL

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Summary

Country	Czechia
Domain	o2.cz
ASN	AS42908
Registry	RIPE
ID	CZ-CZNET-20100318

WHOIS Details

inetnum:        178.17.80.0 - 178.17.111.255
netname:        CZ-CZNET-20100318
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:        2025-04-01T07:33:38Z
last-modified:  2025-04-01T07:33:38Z
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

Nearby Ranges

BGP prefixes that overlap with 178.17.0.0/16

Range	ASN	Company	Num of IPs
178.17.32.0/20	AS31463	Redcentric Solutions Ltd	4,096
178.17.96.0/20	AS16246	O2 Czech Republic, a.s.	4,096
178.17.240.0/20	AS49375	No One Internet Ltd	4,096
178.17.112.0/20	AS1886	BT NET d.o.o. za trgovinu i usluge	4,096
178.17.128.0/20	AS42514	Signal Service LLC	4,096
178.17.224.0/20	AS62023	German fiberONE customers (fiberone.de)	4,096
178.17.160.0/20	AS43289	Trabia	4,096
178.17.144.0/20	AS41164	Telia Norge AS	4,096
178.17.192.0/20	AS34139	TSI Service JSC	4,096
178.17.0.0/20	AS50825	UVT Internet s.r.o.	4,096
178.17.232.0/22	AS200519	German fiberONE customers (fiberone.de)	1,024
178.17.208.0/22	AS210279	DIGITAL MEDIA TECHNOLOGIES LTD	1,024
178.17.212.0/22	AS212694	Applied Satellite Technology Ltd	1,024
178.17.120.0/22	AS1886	BTnet d.o.o.	1,024
178.17.116.0/22	AS1886	BTnet d.o.o	1,024
178.17.124.0/22	AS1886	BTnet d.o.o.	1,024
178.17.112.0/22	AS1886	BTnet d.o.o.	1,024
178.17.180.0/23	AS43038	MTS PJSC	512
178.17.182.0/23	AS43038	MTS PJSC	512
178.17.70.0/23	AS1273	Barclays Bank PLC	512
178.17.178.0/23	AS43038	MTS PJSC	512
178.17.66.0/23	AS1273	Barclays Bank PLC	512
178.17.176.0/23	AS43038	MTS PJSC	512
178.17.236.0/23	AS200519	German fiberONE customers (fiberone.de)	512
178.17.218.0/24	AS207311	Centrum Medyczne Luxmed Sp. z o.o.	256
178.17.36.0/24	AS31463	Nexcess - 4D Sirius II	256
178.17.39.0/24	AS31463	Nexcess - 4D Sirius II	256
178.17.30.0/24	AS44252	Moja Supernova DOO	256
178.17.216.0/24	AS210085	Rzeszowska Agencja Rozwoju Regionalnego S.A.	256

Hosted domains

There are 12 domain names hosted across 8 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
178.17.81.29	net2home.cz	4
178.17.89.148	uwlka.cz	2
178.17.91.31	dancingwarrior.cz	1
178.17.80.32	navarafoto.eu	1
178.17.86.70	msdom.cz	1
178.17.81.28	djlobo.eu	1
178.17.85.33	pericz.cz	1
178.17.92.56	lauramade.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

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Pingable IPs

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

IP Address	ASN	Details
178.17.86.26	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	6.59ms from Prague, CZ
178.17.91.65	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	5.15ms from Prague, CZ
178.17.89.157	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	6.67ms from Prague, CZ
178.17.90.30	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	6.27ms from Prague, CZ
178.17.88.132	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	5.70ms from Prague, CZ
178.17.87.76	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	6.69ms from Prague, CZ
178.17.85.20	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	7.13ms from Prague, CZ
178.17.80.249	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	0.86ms from Prague, CZ
178.17.81.209	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	4.93ms from Prague, CZ
178.17.92.92	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	5.01ms from Prague, CZ
178.17.83.26	AS42908 ORIGINAL AS CZ-NORDICTELECOMREGIONAL	4.95ms 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
73.99.94.164	AS7922 Comcast Cable Communications, LLC	8.65ms from Ashburn, US
212.122.54.52	AS16097 HL komm Telekommunikations GmbH	0.49ms from Frankfurt am Main, DE
87.150.159.164	AS3320 Deutsche Telekom AG	4.95ms from Frankfurt am Main, DE
211.155.228.36	AS4134 CHINANET-BACKBONE	4.47ms from Hangzhou, CN
103.148.25.84	AS139981 PT. Menaksopal Link Nusantara	7.71ms from Jakarta, ID
213.231.51.180	AS34661 BREEZE NETWORK	6.95ms from Kyiv, UA
82.45.110.68	AS5089 Virgin Media Limited	9.26ms from London, GB
90.208.148.244	AS5607 Sky UK Limited	6.22ms from London, GB
67.205.159.4	AS14061 DigitalOcean, LLC	0.20ms from New York City, US
220.110.49.36	AS4713 NTT Communications Corporation	5.00ms from Osaka, JP
76.31.74.84	AS7922 Comcast Cable Communications, LLC	9.22ms from Richardson, US
143.189.198.180	AS2527 Sony Network Communications Inc.	11.52ms from Tokyo, JP
195.26.226.148	AS216071 SERVERS TECH FZCO	0.66ms from Amsterdam, NL
72.83.117.68	AS701 Verizon Business	2.03ms from Ashburn, US
185.8.155.132	AS5606 GTS Telecom SRL	0.62ms from Bucharest, RO
102.41.23.164	AS8452 TE-AS	3.21ms from Cairo, EG
50.236.163.36	AS7922 Comcast Cable Communications, LLC	1.05ms from Chicago, US
221.207.228.4	AS4837 CHINA UNICOM China169 Backbone	16.66ms from Dalian, CN
27.64.195.4	AS7552 Viettel Group	0.93ms from Ho Chi Minh City, VN
45.114.168.228	AS132839 POWER LINE DATACENTER	1.53ms from Hong Kong, HK
73.136.192.244	AS7922 Comcast Cable Communications, LLC	4.78ms from Houston, US
170.231.170.4	AS27843 WIN EMPRESAS S.A.C.	0.07ms from Lima, PE
72.197.73.228	AS22773 Cox Communications Inc.	4.52ms from Los Angeles, US
31.190.170.4	AS1267 WIND TRE S.P.A.	2.67ms from Milan, IT
126.34.162.148	AS17676 SoftBank Corp.	3.65ms from Osaka, JP

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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