AS20701 CZNIC-AS3 CZ.NIC, z.s.p.o.
🇨🇿Org handle: ORG-Cz1-RIPE
RIPE NCCallocatedASPA Published
Announced Prefixes (BGP)
4total
2 IPv42 IPv6
IPv4 Addresses
Allocated (RIR)512
Announced (BGP)512
IPv6 Addresses
Allocated (RIR)2.4×10²⁴
Announced (BGP)2.4×10²⁴
Routing hygiene
Score 10/100 · Low riskRPKI ROA coverage
100%
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
1
diversity 0/100
- Only one upstream seen in the AS paths of its routes
Based on 4 announced prefixes, updated daily (2026-10-24). How the score works · RPKI explained
Announced Prefixes
(BGP)4|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | RIPE | 2026-10-25 | |
| Valid | RIPE | 2026-10-25 | |
| Valid | RIPE | 2026-10-25 | |
| Valid | RIPE | 2026-10-25 |
Allocated Prefixes
(RIR)4Prefix | Country | RIR | Status |
|---|---|---|---|
| 185.43.135.0/24 | 🇨🇿 CZ | RIPE | assigned |
| 193.17.47.0/24 | 🇨🇿 CZ | RIPENCC | assigned |
| 2001:148f:fffe::/48 | 🇨🇿 CZ | RIPE | assigned |
| 2001:148f:ffff::/48 | 🇨🇿 CZ | RIPE | assigned |
All 4 announced prefixes of AS20701 →
Upstream Providers(1)
| ASN | Name |
|---|---|
| AS25192 | 🇨🇿CZNIC-AS CZ.NIC, z.s.p.o. |
BGP Neighbours
(seen in AS paths)Upstreams (1)
Networks AS20701 hands its own prefixes to: transit providers, or peers at an exchange.
- AS25192CZNIC CZ.NIC, Z.S.P.O4
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/20701Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/20701" | jq