Autonomous System details

AS24971

MasterDC s.r.o. · master.cz

Czechia

BitTorrent

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AS24971 – MasterDC s.r.o.

Field	Value
Country	Czechia
Website	master.cz
Hosted domains	117,672
IPv4 addresses	58,880
IPv6 addresses	1,665,032,979,616,295,313,626,846,199,808
ASN type	Hosting
Registry	ripe
Allocated	24 years ago on Jun 11, 2002
Updated	2 months ago on Oct 26, 2025

Netblock	Company	Num of IPs
77.93.192.0/19	MasterDC s.r.o.	8,192
83.167.224.0/19	MasterDC s.r.o.	8,192
89.185.224.0/19	MasterDC s.r.o.	8,192
80.79.16.0/20	MasterDC s.r.o.	4,096
81.31.32.0/20	MasterDC s.r.o.	4,096
178.238.32.0/20	MasterDC s.r.o.	4,096
85.118.128.0/21	MasterDC s.r.o.	2,048
149.62.144.0/21	MasterDC s.r.o.	2,048
5.180.200.0/22	Bydzovsky s.r.o.	1,024
37.205.8.0/22	vpsFree.cz, z.s.	1,024
37.205.12.0/22	vpsFree.cz, z.s.	1,024
91.214.192.0/22	QCM, s.r.o.	1,024
91.226.216.0/22	W HOSTING, s.r.o.	1,024
185.25.184.0/22	NETIO Solutions s.r.o.	1,024
185.32.160.0/22	ANAFRA a.s.	1,024
185.58.40.0/22	MasterDC s.r.o.	1,024
185.85.164.0/22	ServerNow s.r.o.	1,024
185.145.160.0/22	Etnetera Core a.s.	1,024
185.239.216.0/22	AdminIT, s. r. o.	1,024
194.145.180.0/22	ServerNow s.r.o.	1,024
195.140.252.0/22	Virtualmaster, s.r.o.	1,024
176.227.168.0/23	HostingSolutions s.r.o.	512
185.8.164.0/23	vpsFree.cz - Prague3	512
185.8.166.0/23	vpsFree.cz - Brno3	512
188.213.234.0/23	NETIO Solutions s.r.o.	512
188.215.18.0/23	NETIO Solutions s.r.o.	512
193.169.160.0/23	Imarto Inc.	512
37.140.220.0/24	ProfiSMS s.r.o.	256
83.223.52.0/24	Yoursafe Holding B.V.	256
91.213.160.0/24	Internet Info, s.r.o.	256
91.216.179.0/24	oXyShop s.r.o.	256
92.63.56.0/24	NEW TELEKOM, spol. s r.o.	256
130.193.16.0/24	BNV Technologies, s.r.o.	256

Netblock	Company
2a07:4880::/29	Etnetera Core a.s.
2a0c:6380::/29	AdminIT, s. r. o.
2a00:8220::/32	NETIO Solutions s.r.o.
2a00:a5a0::/32	ANAFRA a.s.
2a01:430::/32	MasterDC s.r.o.
2a03:7460::/32	ServerNow s.r.o.
2a0b:3240::/32	Bydzovsky s.r.o.
2a03:3b40:200::/39	vpsFree.cz, z.s.
2a03:3b40::/40	vpsFree.cz - IPv6 - Prague 2
2a03:3b40:100::/40	vpsFree.cz - IPv6 - Brno 2
2001:678:a50::/48	Imarto Inc.
2001:67c:68::/48	Internet Info, s.r.o.
2a04:16c0:200::/48	Yoursafe Holding B.V.

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WHOIS Details

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                                                ASHandle:       AS24971
                                                OrgID:          AS24971
                                                ASName:         AS24971
                                                ASNumber:       AS24971
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 117,672 domain names hosted across 5,770 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
83.167.244.201	██████████	12,196
81.31.37.22	██████████	12,166
83.167.244.202	██████████	9,596
185.25.185.106	███████	4,219
83.167.249.7	██████████	2,619
77.93.211.215	████████	2,466
80.79.30.99	██████████	2,251
81.31.35.130	██████████	2,142
89.185.235.28	██████████	1,853
77.93.211.212	██████████	1,683

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Peers

There are 52 peers for this ASN.

Peers	Name
AS1299	Arelion Sweden AB
AS13004	Serbian Open Exchange DOO
AS14840	BR.Digital Telecom
AS15958	CETINdoo-NET
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS197451	Brno University of Technology
AS198150	SIACOM JSC
AS204957	GREEN FLOID LLC
AS207167	mapnet IT services s.r.o.
AS21045	K-net Technical International Group, s.r.o.
AS211085	mapnet IT services s.r.o.
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD
AS21320	GEANT Vereniging
AS22356	Durand do Brasil Ltda
AS24482	SG.GS
AS263444	Open X Tecnologia Ltda
AS28917	Fiord Networks, UAB
AS29049	Delta Telecom Ltd
AS29504	Freenet Liberec, z.s.
AS3212	Telemach Slovenija d.o.o.
AS32590	Valve Corporation
AS33891	Core-Backbone GmbH
AS35369	LINZ STROM GAS WAERME GmbH fuer Energiedienstleistungen und Telekommunikation
AS36236	NetActuate, Inc
AS37721	Virtual Technologies & Solutions
AS39120	Convergenze S.p.A.
AS40994	Hohl IT e.U.
AS41327	Fiber Telecom S.p.A.
AS43733	Viva Armenia CJSC
AS4455	IX Reach Ltd
AS44901	Belcloud LTD
AS47232	ISP Alliance a.s.
AS48921	Yoursafe Holding B.V.
AS49544	i3D.net B.V
AS50629	LWLcom GmbH
AS51134	Development 777 s.r.o.
AS51184	Fonira Telekom GmbH
AS51185	MainStreaming SpA
AS53062	ALT \| GRUPO BRASIL TECPAR
AS5405	Inter.link GmbH
AS57304	JSC "RetnNet"
AS57463	NetIX Communications JSC
AS59890	Kabel-TV Lampert GmbH & Co KG
AS6204	INTERKVM HOST SRL
AS6424	EDGOO NETWORKS
AS64481	Joint Venture Dragon Capital LLC
AS6663	Euroweb Romania S.R.L.
AS6881	NIX.CZ z.s.p.o.
AS6939	Hurricane Electric LLC
AS8218	Zayo Infrastructure France SA
AS8529	Zain Omantel International FZ-LLC
AS9002	RETN Limited

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ASN API & Database

Upstreams

There are 3 upstreams for this ASN.

upstreams	Name
AS1299	Arelion Sweden AB
AS6939	Hurricane Electric LLC
AS9002	RETN Limited

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ASN API & Database

Downstreams

There are 7 downstreams for this ASN.

Downstreams	Name
AS204957	GREEN FLOID LLC
AS207167	mapnet IT services s.r.o.
AS21045	K-net Technical International Group, s.r.o.
AS211085	mapnet IT services s.r.o.
AS48921	Yoursafe Holding B.V.
AS51134	Development 777 s.r.o.
AS64481	Joint Venture Dragon Capital LLC

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ASN API & Database

Pingable IPs

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

IP Address	ASN	Details
2a01:430:281:1f0::1	AS24971 MasterDC s.r.o.	`2.92ms` from Bratislava, SK
2a01:430:11d::bad:b055	AS24971 MasterDC s.r.o.	`2.95ms` from Bratislava, SK
2a01:430:105:0:beef:ffff:ffff:ffff	AS24971 MasterDC s.r.o.	`3.11ms` from Bratislava, SK
2a01:430:102::2	AS24971 MasterDC s.r.o.	`2.93ms` from Bratislava, SK
2a01:430:37:0:beef:ffff:ffff:fffe	AS24971 MasterDC s.r.o.	`2.99ms` from Bratislava, SK
77.93.211.134	AS24971 MasterDC s.r.o.	`0.14ms` from Brno, CZ
85.118.131.253	AS24971 MasterDC s.r.o.	`0.17ms` from Brno, CZ
178.238.41.61	AS24971 MasterDC s.r.o.	`0.20ms` from Brno, CZ
83.167.238.118	AS24971 MasterDC s.r.o.	`0.14ms` from Brno, CZ
89.185.237.19	AS24971 MasterDC s.r.o.	`0.16ms` from Brno, CZ
77.93.215.66	AS24971 MasterDC s.r.o.	`0.14ms` from Brno, CZ
37.205.13.217	AS24971 MasterDC s.r.o.	`0.23ms` from Prague, CZ
2a01:430:2e::157	AS24971 MasterDC s.r.o.	`0.34ms` from Prague, CZ
2a01:430:20b::2	AS24971 MasterDC s.r.o.	`0.28ms` from Prague, CZ
2a01:430:270::f8	AS24971 MasterDC s.r.o.	`0.33ms` from Prague, CZ
178.238.34.1	AS24971 MasterDC s.r.o.	`0.29ms` from Prague, CZ
2a01:430:26b::1	AS24971 MasterDC s.r.o.	`0.31ms` from Prague, CZ
2a01:430:16c::1	AS24971 MasterDC s.r.o.	`2.96ms` from Bratislava, SK
2a01:430:182::1	AS24971 MasterDC s.r.o.	`3.07ms` from Bratislava, SK
2a01:430:181::1	AS24971 MasterDC s.r.o.	`2.92ms` from Bratislava, SK
2a01:430:28d:abcd::1	AS24971 MasterDC s.r.o.	`5.09ms` from Brno, CZ
81.31.38.221	AS24971 MasterDC s.r.o.	`0.19ms` from Brno, CZ
83.167.228.225	AS24971 MasterDC s.r.o.	`0.18ms` from Brno, CZ
2a01:430:34:0:beef:ffff:ffff:fffe	AS24971 MasterDC s.r.o.	`0.40ms` from Prague, CZ
85.118.132.179	AS24971 MasterDC s.r.o.	`0.23ms` 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
152.201.216.107	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`3.36ms` from Bogota, CO
179.62.156.139	AS27983 Red Intercable Digital S.A.	`11.22ms` from Buenos Aires, AR
52.180.208.11	AS8075 Microsoft Corporation	`1.39ms` from Des Moines, US
27.78.71.155	AS7552 Viettel Group	`1.15ms` from Ho Chi Minh City, VN
201.102.77.171	AS8151 UNINET	`1.14ms` from Mexico City, MX
24.46.27.219	AS6128 Cablevision Systems Corp.	`8.31ms` from New York City, US
153.185.143.155	AS4713 NTT DOCOMO BUSINESS,Inc.	`5.23ms` from Osaka, JP
109.224.71.187	AS197197 CETIN a.s.	`8.10ms` from Prague, CZ
76.28.162.75	AS7922 Comcast Cable Communications, LLC	`5.44ms` from Seattle, US
119.207.196.139	AS4766 Korea Telecom	`1.92ms` from Seoul, KR
111.125.164.11	AS45577 Intervolve Pty Ltd	`0.19ms` from Sydney, AU
71.56.49.75	AS7922 Comcast Cable Communications, LLC	`5.17ms` from Atlanta, US
54.39.75.203	AS16276 OVH SAS	`0.09ms` from Beauharnois, CA
120.8.57.171	AS4837 CHINA UNICOM China169 Backbone	`10.03ms` from Beijing, CN
190.230.158.203	AS7303 Telecom Argentina S.A.	`16.55ms` from Buenos Aires, AR
98.228.217.43	AS7922 Comcast Cable Communications, LLC	`4.82ms` from Chicago, US
161.65.91.59	AS9790 Two Degrees Networks Limited	`6.00ms` from Christchurch, NZ
183.157.20.171	AS4134 CHINANET-BACKBONE	`6.26ms` from Hangzhou, CN
42.115.20.139	AS18403 FPT Telecom Company	`0.12ms` from Hanoi, VN
38.6.224.203	AS398478 PEG TECH INC	`0.27ms` from Hong Kong, HK
4.253.99.155	AS8075 Microsoft Corporation	`0.14ms` from Johannesburg, ZA
203.121.40.27	AS9930 TTNET-MY	`1.42ms` from Kuala Lumpur, MY
212.15.86.123	AS212238 Datacamp Limited	`0.57ms` from Montreal, CA
85.207.100.59	AS25248 RADIOKOMUNIKACE a.s.	`0.38ms` from Prague, CZ
91.105.27.123	AS12578 SIA Tet	`0.71ms` from Riga, LV

Traceroute

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

traceroute -a -n -q1 -f3 89.185.240.245

traceroute to 89.185.240.245 (89.185.240.245): 64 hops max, 52 byte packets

3 [AS24971] 83.167.254.192 181.78 ms

4 [AS24971] 83.167.254.205 0.374 ms

5 [AS24971] 89.185.240.245 18.496 ms

Measurement taken from

IPinfo ProbeNet in Brno, CZ

On December 6th 2025

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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 AS24971 at robtex.

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