Autonomous System details

AS24971

MasterDC s.r.o. · master.cz

Czechia

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AS24971 – MasterDC s.r.o.

Field	Value
Country	Czechia
Website	master.cz
Hosted domains	119,424
IPv4 addresses	58,880
IPv6 addresses	1,665,032,979,616,295,314,167,600,000,000
ASN type	Hosting
Registry	ripe
Allocated	24 years ago on Jun 11, 2002
Updated	14 days ago on Apr 15, 2026

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 119,424 domain names hosted across 5,809 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
83.167.244.201	██████████	11,503
81.31.37.22	██████████	9,451
83.167.244.202	██████████	9,160
83.167.249.7	██████████	2,116
81.31.35.130	██████████	2,102
80.79.30.99	██████████	1,963
77.93.211.215	████████	1,766
89.185.235.28	██████████	1,694
77.93.211.212	██████████	1,441
5.180.200.5	█████████	1,327

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Peers

There are 50 peers for this ASN.

Peers	Name
AS1299	Arelion Sweden AB
AS13194	Bite IP Network
AS14840	BR.Digital Telecom
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS197451	Brno University of Technology
AS198150	SIACOM JSC
AS202857	INIZIO Internet Media s.r.o.
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
AS24482	SG.GS
AS24940	Hetzner Online GmbH
AS263444	Open X Tecnologia Ltda
AS264409	GRUPO YAX
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
AS47232	ISP Alliance a.s.
AS47692	Nessus GmbH
AS48921	Yoursafe Holding B.V.
AS49544	i3D.net B.V
AS50629	LWLcom GmbH
AS51134	Development 777 s.r.o.
AS51184	Fonira Telekom GmbH
AS53062	ALT \| GRUPO BRASIL TECPAR
AS57304	JSC RetnNet
AS57463	NetIX Communications JSC
AS59890	Kabel-TV Lampert GmbH & Co KG
AS6204	INTERKVM HOST SRL
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 8 downstreams for this ASN.

Downstreams	Name
AS202857	INIZIO Internet Media s.r.o.
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

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

IP Address	ASN	Details
2a01:430:195::1	AS24971 MasterDC s.r.o.	`3.08ms` from Bratislava, SK
2a01:430:26::1:161	AS24971 MasterDC s.r.o.	`2.93ms` from Bratislava, SK
2a01:430:13f::1	AS24971 MasterDC s.r.o.	`2.96ms` from Bratislava, SK
2a01:430:126:0:66d1:54ff:fee0:245b	AS24971 MasterDC s.r.o.	`2.93ms` from Bratislava, SK
89.185.236.55	AS24971 MasterDC s.r.o.	`0.14ms` from Brno, CZ
77.93.205.29	AS24971 MasterDC s.r.o.	`0.33ms` from Brno, CZ
89.185.245.113	AS24971 MasterDC s.r.o.	`0.17ms` from Brno, CZ
89.185.224.38	AS24971 MasterDC s.r.o.	`0.17ms` from Brno, CZ
77.93.201.227	AS24971 MasterDC s.r.o.	`0.15ms` from Brno, CZ
130.193.16.19	AS24971 MasterDC s.r.o.	`0.15ms` from Brno, CZ
2a01:430:26c::100	AS24971 MasterDC s.r.o.	`0.38ms` from Prague, CZ
2a0c:6380:1:104::1	AS24971 MasterDC s.r.o.	`0.44ms` from Prague, CZ
83.223.52.1	AS24971 MasterDC s.r.o.	`0.28ms` from Prague, CZ
2a03:3b40:288:0:9209:d0ff:fe0c:fdf6	AS24971 MasterDC s.r.o.	`2.82ms` from Prague, CZ
185.145.160.2	AS24971 MasterDC s.r.o.	`0.33ms` from Prague, CZ
2a01:430:292:0:beef:ffff:ffff:ffff	AS24971 MasterDC s.r.o.	`0.37ms` from Prague, CZ
2a01:430:25b:5::194	AS24971 MasterDC s.r.o.	`0.23ms` from Prague, CZ
2a01:430:230::1	AS24971 MasterDC s.r.o.	`0.40ms` from Prague, CZ
77.93.209.218	AS24971 MasterDC s.r.o.	`0.21ms` from Prague, CZ
2a03:3b40:209::1	AS24971 MasterDC s.r.o.	`6.32ms` from Prague, CZ
2a01:430:24a::107	AS24971 MasterDC s.r.o.	`0.34ms` from Prague, CZ
2a01:430:267::c0ff:ee	AS24971 MasterDC s.r.o.	`0.31ms` from Prague, CZ
2a01:430:16b:0:ffff:1a1a:882d:ef01	AS24971 MasterDC s.r.o.	`2.92ms` from Bratislava, SK
2a01:430:10b:1::2	AS24971 MasterDC s.r.o.	`2.83ms` from Bratislava, SK
2a01:430:103:5::1	AS24971 MasterDC s.r.o.	`2.94ms` from Bratislava, SK

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
70.65.117.59	AS6327 Shaw Communications	`5.06ms` from Calgary, CA
104.194.158.75	AS14956 RouterHosting LLC	`0.68ms` from Frankfurt am Main, DE
79.215.96.91	AS3320 Deutsche Telekom AG	`6.40ms` from Frankfurt am Main, DE
14.61.102.139	AS4766 Korea Telecom	`6.70ms` from Incheon, KR
211.201.154.235	AS9318 SK Broadband Co Ltd	`0.87ms` from Incheon, KR
182.187.142.75	AS17557 Pakistan Telecommunication Company Limited	`5.12ms` from Islamabad, PK
52.85.113.251	AS16509 Amazon.com, Inc.	`0.34ms` from London, GB
133.18.139.11	AS24282 KAGOYA JAPAN Inc.	`0.98ms` from Osaka, JP
150.9.10.187	AS4685 Asahi Net	`1.88ms` from Osaka, JP
181.178.52.155	AS11556 Cable & Wireless Panama	`1.67ms` from Panama, PA
174.48.248.171	AS7922 Comcast Cable Communications, LLC	`7.44ms` from Pompano Beach, US
54.209.32.91	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
187.148.219.187	AS8151 UNINET	`8.63ms` from Santiago de Queretaro, MX
112.178.161.155	AS4766 Korea Telecom	`5.40ms` from Seoul, KR
18.140.195.123	AS16509 Amazon.com, Inc.	`0.17ms` from Singapore, SG
182.20.81.203	AS10010 TOKAI Communications Corporation	`2.88ms` from Tokyo, JP
173.66.200.27	AS701 Verizon Business	`1.97ms` from Ashburn, US
110.242.44.235	AS4837 CHINA UNICOM China169 Backbone	`11.19ms` from Beijing, CN
178.223.218.187	AS8400 TELEKOM SRBIJA a.d.	`3.83ms` from Belgrade, RS
217.160.208.91	AS8560 IONOS SE	`0.62ms` from Berlin, DE
85.101.204.251	AS9121 Turk Telekomunikasyon Anonim Sirketi	`4.41ms` from Istanbul, TR
212.34.105.75	AS12389 PJSC Rostelecom	`6.95ms` from Moscow, RU
182.101.244.59	AS4134 CHINANET BACKBONE	`7.34ms` from Nanchang, CN
68.132.52.219	AS701 Verizon Business	`2.48ms` from New York City, US
45.88.129.59	AS207147 Nexera SAS	`1.92ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -m9 185.145.162.1

traceroute to 185.145.162.1 (185.145.162.1): 9 hops max, 52 byte packets

1 [AS15169] 142.251.248.129 264.753 ms

2 *

3 *

4 [AS24971] 83.167.254.164 159.255 ms

5 [AS24971] 83.167.254.175 162.081 ms

6 [AS24971] 194.145.182.39 159.086 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Delhi, IN

On April 24th 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 AS24971 at robtex.

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