AS24971
MasterDC s.r.o.
AS24971 is MasterDC s.r.o. (master.cz). It announces 58,112 IPv4 addresses in 33 prefixes, and 13 IPv6 prefixes.
Czechia· RIPE· allocated 2002-06-11· hosting
58,112
IPv4 addresses announced
33
IPv4 prefixes
13
IPv6 prefixes
97.83%
of its routes RPKI-valid
58,112
of its IPv4 geolocated
3
countries
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- Czechia57,840 · 99.53%
- The Netherlands256 · 0.44%
- Slovakia16 · 0.03%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- MASTER-AS
- name
- MasterDC s.r.o.
- org
- ORG-MIs2-RIPE
- org name
- MasterDC s.r.o.
- org address
- Purkynova 3030/35e, 612 00, Brno, CZECH REPUBLIC
- org country
- CZ
- country
- CZ
- source
- ripe
- status
- ASSIGNED
- created
- 2002-06-11
- updated
- 2026-09-22
- descr
- Czech Republic / www.master.cz / e-mail: noc@master.cz
- remarks
- ======================== Upstream ======================== / = Arelion FKA Telia / = RETN / ======================== Downstream ======================== / = Q-Net CZ / = netsafe / = INTACTO GAMES a.s. / = DCIT, a.s. / = amccomp s.r.o. / = LAYER6 / = Dragon-Capital / = INIZIO Internet Media s.r.o. / ======================== peering.cz peering ======================== / ======================== NIX Prague peering ======================== / ======================== NIX Bratislava peering ================
- maintainer
- RIPE-NCC-END-MNT|MASTER-MNT
- abuse name
- MasterDC contact
- abuse email
- abuse@master.cz
- abuse phone
- +420777919484
- abuse kind
- role
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP763aura, anonymousvpn_org1.31%
- anyip, ipfoxy0.01%
- floppydata0.00%
- None here
- Tor IP100.02%
- None here
- Hosting IP54,01692.95%
- None here
- None here
- None here
- SSH IP4,2697.35%
- SMTP IP1,3132.26%
- 1.41%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 5.180.200.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 37.140.220.0/24 | Czechia | valid | 17 | 2026-10-02 |
| 37.205.8.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 37.205.12.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 77.93.192.0/19 | Czechia | valid | 17 | 2026-10-02 |
| 80.79.16.0/20 | Czechia | valid | 17 | 2026-10-02 |
| 81.31.32.0/20 | Czechia | valid | 17 | 2026-10-02 |
| 83.167.224.0/19 | Czechia | valid | 17 | 2026-10-02 |
| 83.223.52.0/24 | The Netherlands | not found | 17 | 2026-10-02 |
| 85.118.128.0/21 | Czechia | valid | 17 | 2026-10-02 |
| 89.185.224.0/19 | Czechia | valid | 17 | 2026-10-02 |
| 91.213.160.0/24 | Czechia | valid | 17 | 2026-10-02 |
| 91.214.192.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 91.216.179.0/24 | Czechia | valid | 17 | 2026-10-02 |
| 91.226.216.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 92.63.56.0/24 | Czechia | valid | 17 | 2026-10-02 |
| 130.193.16.0/24 | Czechia | valid | 17 | 2026-10-02 |
| 149.62.144.0/21 | Czechia | valid | 17 | 2026-10-02 |
| 176.227.168.0/23 | Czechia | valid | 17 | 2026-10-02 |
| 178.238.32.0/20 | Czechia | valid | 17 | 2026-10-02 |
| 185.8.164.0/23 | Czechia | valid | 17 | 2026-10-02 |
| 185.8.166.0/23 | Czechia | valid | 17 | 2026-10-02 |
| 185.25.184.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 185.32.160.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 185.58.40.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 185.85.164.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 185.145.160.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 185.239.216.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 188.213.234.0/23 | Czechia | valid | 17 | 2026-10-02 |
| 188.215.18.0/23 | Czechia | valid | 17 | 2026-10-02 |
| 193.169.160.0/23 | Czechia | valid | 17 | 2026-10-02 |
| 194.145.180.0/22 | Czechia | valid | 17 | 2026-10-02 |
| 195.140.252.0/22 | Czechia | valid | 17 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2001:678:a50::/48 | Czechia | valid | 20 | 2026-10-02 |
| 2001:67c:68::/48 | Czechia | valid | 20 | 2026-10-02 |
| 2a00:8220::/32 | Czechia | valid | 20 | 2026-10-02 |
| 2a00:a5a0::/32 | Czechia | valid | 20 | 2026-10-02 |
| 2a01:430::/32 | Czechia | valid | 20 | 2026-10-02 |
| 2a03:3b40::/40 | Czechia | valid | 20 | 2026-10-02 |
| 2a03:3b40:100::/40 | Czechia | valid | 20 | 2026-10-02 |
| 2a03:3b40:200::/39 | Czechia | valid | 20 | 2026-10-02 |
| 2a03:7460::/32 | Czechia | valid | 20 | 2026-10-02 |
| 2a04:16c0:200::/48 | The Netherlands | valid | 20 | 2026-10-02 |
| 2a07:4880::/29 | Czechia | valid | 20 | 2026-10-02 |
| 2a0b:3240::/32 | Czechia | valid | 20 | 2026-10-02 |
| 2a0c:6380::/29 | Czechia | valid | 20 | 2026-10-02 |
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