AS43037 SEZNAM-CZ Seznam.cz, a.s.
🇨🇿Org handle: ORG-Sa508-RIPE
RIPE NCCallocated
Announced Prefixes (BGP)
12total
6 IPv46 IPv6
IPv4 Addresses
Allocated (RIR)1,536
Announced (BGP)3,072
IPv6 Addresses
Allocated (RIR)7.9×10²⁸
Announced (BGP)7.9×10²⁸
Announced Prefixes
(BGP)12|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 | |
| Valid | RIPE | 2026-10-09 |
1-10 of 12
1 / 2
Allocated Prefixes
(RIR)9Prefix | Country | RIR | Status |
|---|---|---|---|
| 77.75.74.0/24 | 🇨🇿 CZ | RIPE | assigned |
| 77.75.75.0/24 | 🇨🇿 CZ | RIPE | assigned |
| 185.66.188.0/22 | 🇨🇿 CZ | RIPENCC | allocated |
| 2a02:598::/32 | 🇨🇿 CZ | RIPENCC | allocated |
| 2a02:598:2::/48 | 🇨🇿 CZ | RIPE | assigned |
| 2a02:598:a::/48 | 🇨🇿 CZ | RIPE | assigned |
| 2a02:598:b::/48 | 🇨🇿 CZ | RIPE | assigned |
| 2a02:598:3333::/48 | 🇨🇿 CZ | RIPE | assigned |
| 2a02:598:4444::/48 | 🇨🇿 CZ | RIPE | assigned |
All 12 announced prefixes of AS43037 →
BGP Neighbours
(seen in AS paths)Upstreams (1)
Networks AS43037 hands its own prefixes to: transit providers, or peers at an exchange.
- AS5610O2 CZECH REPUBLIC O2 Czech Republic, A.S12
Downstreams (1)
Networks whose own prefixes AS43037 passes on: usually its customers.
- AS200600SEZNAM CZ DC Seznam.Cz Datova Centra, S.R.O2
Other adjacent networks (1)
Adjacent to AS43037 in the transit part of AS paths: peers, providers or customers.
- AS6939Hurricane Electric1
ASPA
No ASPA
Abuse Contact
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
- ASPA explainedWhy AS43037 should publish an ASPA object
- 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/43037Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/43037" | jq