AS24971 MASTER-AS MasterDC s.r.o.
🇨🇿Org handle: ORG-MIs2-RIPE
Czech Republic / www.master.cz
RIPE NCCallocatedASPA Published
Announced Prefixes (BGP)
46total
33 IPv413 IPv6
IPv4 Addresses
Allocated (RIR)59,088
Announced (BGP)58,880
IPv6 Addresses
Allocated (RIR)1.5×10³⁰
Announced (BGP)1.6×10³⁰
Prefix Limit (IPv4)
100
Prefix Limit (IPv6)
50
Country
🇨🇿 CZRIR
RIPE NCCStatus
allocated
Allocated
2002-06-11
Routing hygiene
Score 8/100 · Low riskRPKI ROA coverage
97.8%
no RPKI invalid prefixes
IRR route objects
100%
no origin mismatches
Hijack signals
0
0 announced against others' ROAs, 0 own announced by others
Upstreams
3
diversity 27/100
- Routes concentrated on one upstream (85% of routes)
Based on 46 announced prefixes, updated daily (2026-10-17). How the score works · RPKI explained
Announced Prefixes
(BGP)46|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 | |
| No ROA | RIPE | 2026-10-26 | |
| Valid | RIPE | 2026-10-26 |
1-10 of 46
1 / 5
Allocated Prefixes
(RIR)178Prefix | Country | RIR | Status |
|---|---|---|---|
| 5.180.200.0/22 | 🇨🇿 CZ | RIPENCC | allocated |
| 37.140.220.0/24 | 🇨🇿 CZ | RIPENCC | allocated |
| 37.205.12.0/22 | 🇨🇿 CZ | RIPE | assigned |
| 77.93.192.0/19 | 🇨🇿 CZ | RIPENCC | allocated |
| 77.93.201.32/29 | 🇨🇿 CZ | RIPE | assigned |
| 77.93.204.0/25 | 🇨🇿 CZ | RIPE | assigned |
| 77.93.209.64/26 | 🇨🇿 CZ | RIPE | assigned |
| 77.93.209.192/28 | 🇨🇿 CZ | RIPE | assigned |
| 77.93.211.16/28 | 🇨🇿 CZ | RIPE | assigned |
| 77.93.217.64/26 | 🇨🇿 CZ | RIPE | assigned |
1-10 of 178
1 / 18
All 46 announced prefixes of AS24971 →
BGP Neighbours
(seen in AS paths)Upstreams (3)
Networks AS24971 hands its own prefixes to: transit providers, or peers at an exchange.
Downstreams (6)
Networks whose own prefixes AS24971 passes on: usually its customers.
Abuse Contact
+31205354444
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- How to run an ASPA checkVerify the upstream providers listed above
- IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/24971Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/24971" | jq