BGP & ASN Lookup
Enter an IPv4 or IPv6 address, a CIDR prefix, or an ASN (e.g. AS15169)
About BGP & ASN Lookup
What you can look up
- IPv4 / IPv6 — finds announcing prefix and origin AS
- CIDR prefix — e.g.
8.8.8.0/24 - ASN — e.g.
AS15169
AS Paths tab
- Multi-vantage — paths from 25+ RIPE RIS collectors worldwide
- Source perspective — filter by source AS or IP to approximate what that network sees
- Communities decoded — blackhole, no-export, customer/peer tagging
RPKI states
- Valid — ROA matches origin AS and prefix length
- Invalid — ROA exists but doesn't match — possible hijack
- No ROA — no Route Origin Authorization published
Data: BGPView · RIPE NCC RIS (bgp-state, ris-peers, as-names) · RPKI — all free, public, real-time.