1. All IP Ranges
  2. 81.0.0.0/8
  3. 81.31.0.0/16
  4. AS24971  | 81.31.32.0/20

81.31.32.0/20

AS24971  ·  MasterDC s.r.o.

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

Summary

Country Czechia
Domain master.cz
ASN AS24971
Registry RIPE
ID CZ-MASTER-20020528

WHOIS Details

inetnum:        81.31.32.0 - 81.31.47.255
org:            ORG-MIs2-RIPE
netname:        CZ-MASTER-20020528
country:        CZ
admin-c:        MZ2189-RIPE
tech-c:         PV352-RIPE
status:         ALLOCATED PA
notify:         zidek@master.cz
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MASTER-MNT
mnt-routes:     MASTER-MNT
created:        2002-05-28T08:50:18Z
last-modified:  2017-01-17T13:19:39Z
source:         RIPE
abuse-email:    abuse@master.cz
abuse-c:        MAIc-RIPE
abuse-org:      ORG-MIs2-RIPE

organisation:   ORG-MIs2-RIPE
org-name:       MasterDC s.r.o.
country:        CZ
org-type:       LIR
address:        Purkynova 3030/35e
address:        612 00
address:        Brno
address:        CZECH REPUBLIC
phone:          +420 777919700
e-mail:         lir-req@master.cz
mnt-ref:        MASTER-MNT
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MASTER-MNT
admin-c:        PV352-RIPE
admin-c:        JIPA-RIPE
admin-c:        MZI-RIPE
admin-c:        PZAK-RIPE
abuse-c:        MAIc-RIPE
created:        2004-04-17T11:04:37Z
last-modified:  2025-04-29T09:47:49Z
source:         RIPE
abuse-email:    abuse@master.cz
abuse-c:        MAIc-RIPE
abuse-org:      undefined

person:         Martin Zidek
address:        Master Internet s.r.o.
address:        Cejl 20
address:        602 00 Brno
address:        Czech Republic
phone:          +420 777919700
e-mail:         zidek@master.cz
nic-hdl:        MZ2189-RIPE
mnt-by:         MASTER-MNT
created:        2002-05-24T21:26:48Z
last-modified:  2017-10-30T21:45:28Z
source:         RIPE

person:         Petr Vosmera
address:        MasterDC s.r.o.
address:        Purkynova 3030/35e
address:        612 00 Brno
address:        Czech Republic
phone:          +420 777 919200
fax-no:         +420 608 091405
nic-hdl:        PV352-RIPE
e-mail:         vosmera@master.cz
mnt-by:         MASTER-MNT
created:        2002-05-24T21:49:28Z
last-modified:  2025-04-30T12:45:18Z
source:         RIPE

route:          81.31.32.0/20
descr:          MASTER-NET-1
origin:         AS24971
mnt-by:         MASTER-MNT
created:        2002-06-17T11:04:51Z
last-modified:  2002-06-17T11:04:51Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 81.31.0.0/16

Range ASN Company Num of IPs
81.31.96.0/19 AS8468 Cityfibre Limited 8,192
81.31.160.0/19 AS12660 Sharif University Of Technology 8,192
81.31.0.0/19 AS3257 GTT Communications Inc. 8,192
81.31.80.0/20 AS3292 TDC Holding A/S 4,096
81.31.48.0/20 AS41242 Sofor Oy 4,096
81.31.128.0/20 AS7029 7 REASONS S.R.L. 4,096
81.31.64.0/20 AS12519 FastNet International Ltd 4,096
81.31.204.0/22 AS197383 ACTIVIUM INFORMATION DESIGN SAS 1,024
81.31.252.0/22 AS56876 Chapar Rasaneh LLC 1,024
81.31.242.0/23 AS61317 Chapar Rasaneh LLC 512
81.31.200.0/23 AS44521 Jagex Limited 512
81.31.210.0/23 AS3320 Adrian Landsgesell trading as Landsgesell & Graca Costa Solutions GbR 512
81.31.202.0/23 AS44521 Jagex Limited 512
81.31.235.0/24 AS212609 Private Customer 256
81.31.231.0/24 AS214271 Private Customer 256
81.31.213.0/24 AS214456 ServerSP NOC - Hosting Infrastructure 256
81.31.193.0/24 AS398781 cleardocks LLC 256
81.31.232.0/24 AS401443 Private Customer 256
81.31.199.0/24 AS44486 Marco Lingl trading as Cyberse GmbH & Co. KG 256
81.31.145.0/24 AS47242 Host SpA 256
81.31.146.0/24 AS47242 Host Virtual Datacenter Service Network 256
81.31.147.0/24 AS47242 Host SpA 256
81.31.148.0/24 AS47242 Host SpA 256
81.31.149.0/24 AS47242 Host SpA 256
81.31.151.0/24 AS47242 Host SpA 256
81.31.154.0/24 AS47242 Host Core Network Infrastructure 256
81.31.155.0/24 AS47242 Host SpA 256
81.31.156.0/24 AS47242 Host SpA 256
81.31.157.0/24 AS47242 Host SpA 256
81.31.233.0/24 AS57235 KhatamUnivercity 256
81.31.236.0/24 AS57235 Soheil Saeidi 256
81.31.238.0/24 AS57235 SamanShahmir 256
81.31.239.0/24 AS57235 Khayam Building 256
81.31.248.0/24 AS57235 Sky Com 256
81.31.247.0/24 AS57494 JSC TIMEWEB 256
81.31.246.0/24 AS9123 JSC TIMEWEB 256
81.31.234.0/24 AS149766 Y.U.T Corporate Company Limited 256
81.31.208.0/24 AS150623 HostDZire Web Services Private Limited 256
81.31.214.0/24 AS198016 KSS 256
81.31.197.0/24 AS204601 Zomro B.V. 256
81.31.215.0/24 AS206292 GHCMNET 256
81.31.209.0/24 AS207513 HOSTOFF infrastructure and hosting services 256
81.31.194.0/24 AS208220 Offerhost Solutions Inc 256
81.31.195.0/24 AS208220 Offerhost Solutions Inc 256
81.31.244.0/24 AS210976 Timeweb, LLP 256
81.31.245.0/24 AS210976 Timeweb, LLP 256
81.31.196.0/24 AS211216 Protese S.L. 256
81.31.198.0/24 AS211415 DEMA Com Ltd. 256
81.31.212.0/24 AS211431 Andrew A 256

Hosted domains

There are 17,868 domain names hosted across 196 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
81.31.37.22 lacnyeshop.sk 12166
81.31.35.130 autoskoladato.cz 2142
81.31.33.166 rodokmen.sk 277
81.31.47.204 nemocnice-beroun.cz 277
81.31.46.144 itabule.cz 248
81.31.46.138 skauting.cz 246
81.31.35.135 radeklorenc.cz 213
81.31.47.101 abc3d.cz 130
81.31.44.120 psychologicke-poradenstvo.sk 124
81.31.35.131 kvalitni-pr-clanky.cz 121
81.31.35.144 credit-money.cz 103
81.31.35.50 fonticulus.cz 100
81.31.35.155 envicrack.cz 89
81.31.36.125 detenice.cz 78
81.31.42.6 genea.cz 73
81.31.45.90 kondiceonline.cz 68
81.31.42.13 helmaroto.eu 67
81.31.38.149 panoramaprag.eu 66
81.31.46.146 beup.cz 60
81.31.46.241 aptsladovna.cz 58

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

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

IP Address ASN Details
81.31.33.204 AS24971 MasterDC s.r.o. 0.17ms from Brno, CZ
81.31.40.226 AS24971 MasterDC s.r.o. 0.10ms from Brno, CZ
81.31.35.147 AS24971 MasterDC s.r.o. 0.24ms from Prague, CZ
81.31.46.193 AS24971 MasterDC s.r.o. 0.10ms from Brno, CZ
81.31.43.198 AS24971 MasterDC s.r.o. 0.13ms from Brno, CZ
81.31.42.139 AS24971 MasterDC s.r.o. 0.18ms from Brno, CZ
81.31.44.140 AS24971 MasterDC s.r.o. 0.12ms from Brno, CZ
81.31.45.67 AS24971 MasterDC s.r.o. 0.12ms from Brno, CZ
81.31.36.83 AS24971 MasterDC s.r.o. 0.15ms from Brno, CZ
81.31.47.139 AS24971 MasterDC s.r.o. 0.14ms from Brno, CZ
81.31.37.34 AS24971 MasterDC s.r.o. 0.15ms from Brno, CZ
81.31.32.134 AS24971 MasterDC s.r.o. 0.15ms from Brno, CZ
81.31.38.149 AS24971 MasterDC s.r.o. 0.16ms from Brno, CZ
81.31.39.188 AS24971 MasterDC s.r.o. 0.14ms from Brno, CZ
81.31.41.74 AS24971 MasterDC s.r.o. 0.17ms from Brno, CZ
81.31.34.151 AS24971 MasterDC s.r.o. 0.16ms from Brno, 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
59.182.82.36 AS9829 National Internet Backbone 13.24ms from Bengaluru, IN
174.109.98.228 AS11426 Charter Communications Inc 11.47ms from Charlotte, US
24.79.53.228 AS6327 Shaw Communications 18.12ms from Chicago, US
174.0.151.84 AS6327 Shaw Communications 5.39ms from Edmonton, CA
183.130.16.20 AS4134 CHINANET-BACKBONE 11.34ms from Nanchang, CN
67.231.242.84 AS40244 Turnkey Internet Inc. 3.74ms from New York City, US
117.52.86.164 AS3786 LG DACOM Corporation 1.08ms from Seoul, KR
218.48.60.148 AS9318 SK Broadband Co Ltd 1.34ms from Seoul, KR
175.104.61.164 AS10013 FreeBit Co.,Ltd. 13.41ms from Tokyo, JP
171.40.34.244 AS4134 CHINANET-BACKBONE 3.52ms from Wuhan, CN
115.59.226.4 AS4837 CHINA UNICOM China169 Backbone 4.28ms from Zhengzhou, CN
85.152.76.36 AS12946 R Cable y Telecable Telecomunicaciones, S.A.U. 14.33ms from A Coruna, ES
108.28.195.68 AS701 Verizon Business 1.95ms from Ashburn, US
20.55.60.164 AS8075 Microsoft Corporation 0.70ms from Ashburn, US
123.57.4.180 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 1.95ms from Beijing, CN
121.49.195.4 AS4538 China Education and Research Network Center 18.19ms from Chengdu, CN
23.253.108.100 AS33070 Rackspace Hosting 0.96ms from Dallas, US
83.113.155.148 AS3215 Orange S.A. 13.87ms from Frankfurt am Main, DE
206.84.167.52 AS23674 Nayatel (Pvt) Ltd 1.54ms from Islamabad, PK
49.64.25.36 AS4134 CHINANET-BACKBONE 4.77ms from Nanjing, CN
115.38.133.68 AS18126 Chubu Telecommunications Company, Inc. 9.06ms from Osaka, JP
177.135.155.52 AS18881 TELEFÔNICA BRASIL S.A 1.12ms from Osasco, BR
179.211.135.4 AS28573 Claro NXT Telecomunicacoes Ltda 5.80ms from Rio de Janeiro, BR
204.130.244.116 AS394973 Aarki, Inc. 0.41ms from Santa Clara, US
180.158.198.68 AS4812 China Telecom (Group) 2.55ms from Shanghai, CN

Traceroute

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

$
traceroute -a -n -q1 -f3 81.31.40.202
traceroute to 81.31.40.202 (81.31.40.202): 64 hops max, 52 byte packets
3 [AS24971] 77.93.206.31 0.388 ms
4 [AS24971] 81.31.40.202 0.181 ms
Measurement taken from IPinfo ProbeNet in Brno, CZ
On

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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales
IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs