AS number 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 117,393
Number of IPv4 58,880
Number of IPv6 1,665,032,979,616,295,313,626,846,199,808
ASN type Hosting
Registry ripe
Allocated 23 years ago on Jun 11, 2002
Updated 6 days ago on Oct 26, 2025

IP Ranges

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 117,393 domain names hosted across 5,727 IP addresses on this ASN.

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IP Address Domain Domains on this IP
81.31.37.22 ██████████ 12,068
83.167.244.201 ██████████ 12,037
83.167.244.202 ██████████ 9,521
185.25.185.106 ████████ 4,095
83.167.249.7 ██████████ 2,608
77.93.211.215 ████████ 2,547
81.31.35.130 ██████████ 2,249
80.79.30.99 ██████████ 2,222
89.185.235.28 ██████████ 1,844
77.93.211.212 ██████████ 1,735

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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 Provider
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
AS5405 Inter.link GmbH
AS57304 JSC "RetnNet"
AS57463 NetIX Communications JSC
AS59890 Kabel-TV Lampert GmbH & Co KG
AS60068 Datacamp Limited
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

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

IP Address ASN Details
2a01:430:141:1::1 AS24971 MasterDC s.r.o. 2.91ms from Bratislava, SK
2a01:430:149::2 AS24971 MasterDC s.r.o. 2.88ms from Bratislava, SK
2a01:430:120::4d5d:db6e AS24971 MasterDC s.r.o. 2.87ms from Bratislava, SK
81.31.43.198 AS24971 MasterDC s.r.o. 0.14ms from Brno, CZ
149.62.147.51 AS24971 MasterDC s.r.o. 0.17ms from Brno, CZ
185.58.41.81 AS24971 MasterDC s.r.o. 0.17ms from Brno, CZ
83.167.251.253 AS24971 MasterDC s.r.o. 0.20ms from Brno, CZ
89.185.244.84 AS24971 MasterDC s.r.o. 0.17ms from Brno, CZ
91.214.192.254 AS24971 MasterDC s.r.o. 0.21ms from Brno, CZ
185.58.40.254 AS24971 MasterDC s.r.o. 0.19ms from Brno, CZ
2a01:430:260:0:beef:ffff:ffff:ffff AS24971 MasterDC s.r.o. 0.40ms from Prague, CZ
89.185.229.11 AS24971 MasterDC s.r.o. 0.27ms from Prague, CZ
2a01:430:3b::1 AS24971 MasterDC s.r.o. 0.37ms from Prague, CZ
149.62.149.124 AS24971 MasterDC s.r.o. 0.21ms from Prague, CZ
2a01:430:30:101::4 AS24971 MasterDC s.r.o. 0.29ms from Prague, CZ
188.213.234.47 AS24971 MasterDC s.r.o. 0.31ms from Prague, CZ
2a01:430:103:4::2 AS24971 MasterDC s.r.o. 2.91ms from Bratislava, SK
2a01:430:11c::1 AS24971 MasterDC s.r.o. 2.97ms from Bratislava, SK
2a01:430:129:1::1 AS24971 MasterDC s.r.o. 3.14ms from Bratislava, SK
2a03:3b40:100::1 AS24971 MasterDC s.r.o. 2.92ms from Bratislava, SK
81.31.33.19 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
89.185.250.29 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
2a01:430:26f::1 AS24971 MasterDC s.r.o. 0.39ms from Prague, CZ
2a01:430:33::3 AS24971 MasterDC s.r.o. 2.92ms from Bratislava, SK
2a01:430:137:1::2 AS24971 MasterDC s.r.o. 2.89ms 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
217.55.174.75 AS36992 ETISALAT MISR 11.63ms from Cairo, EG
14.254.225.203 AS45899 VNPT Corp 8.29ms from Da Nang, VN
142.202.164.43 AS398203 MidSouth Fiber 0.24ms from Dallas, US
195.123.105.43 AS15943 wilhelm.tel GmbH 0.43ms from Hamburg, DE
58.176.242.155 AS9269 Hong Kong Broadband Network Ltd. 1.27ms from Hong Kong, HK
58.176.8.59 AS9269 Hong Kong Broadband Network Ltd. 1.26ms from Hong Kong, HK
208.32.105.11 AS174 Cogent Communications, LLC 0.10ms from Los Angeles, US
142.41.247.91 AS852 TELUS Communications Inc. 4.02ms from Montreal, CA
71.244.241.155 AS701 Verizon Business 4.43ms from Philadelphia, US
45.236.14.171 AS268219 SDG TELECOM E SERVICOS LTDA - ME 8.27ms from Rio de Janeiro, BR
211.223.226.11 AS10042 SUSEONG COLLEGE 4.82ms from Seoul, KR
54.248.9.75 AS16509 Amazon.com, Inc. 0.14ms from Tokyo, JP
20.89.31.11 AS8075 Microsoft Corporation 0.13ms from Tokyo, JP
92.46.181.107 AS9198 JSC Kazakhtelecom 2.18ms from Almaty, KZ
75.207.108.171 AS6167 Verizon Business 15.45ms from Atlanta, US
122.143.89.187 AS4837 CHINA UNICOM China169 Backbone 4.57ms from Changchun, CN
73.34.38.251 AS7922 Comcast Cable Communications, LLC 7.84ms from Denver, US
65.52.187.187 AS8075 Microsoft Corporation 0.32ms from Hong Kong, HK
61.10.75.235 AS9908 HK Cable TV Ltd 0.44ms from Hong Kong, HK
175.163.116.107 AS4837 CHINA UNICOM China169 Backbone 8.48ms from Liaoyang, CN
79.50.31.171 AS3269 Telecom Italia S.p.A. 15.25ms from Naples, IT
71.123.45.187 AS701 Verizon Business 1.78ms from Philadelphia, US
210.99.162.75 AS4766 Korea Telecom 1.73ms from Seoul, KR
49.31.116.75 AS4766 Korea Telecom 7.20ms from Seoul, KR
103.82.108.123 AS7551 Cloud Central Pty Ltd 4.45ms from Sydney, AU

Traceroute

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

$
traceroute -a -n -q1 -f3 89.185.252.105
traceroute to 89.185.252.105 (89.185.252.105): 64 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Brno, CZ
On

Related Networks

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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