Looking glass, RPKI and routing tools for network engineers.
Check Host
Ping, HTTP, TCP and DNS checks from nodes worldwide.
open →RPKI Analyzer
Paste a BGP table and find RPKI-invalid routes.
open →BGP Map
AS-path graph for a prefix from the RIPEstat looking glass.
open →ASN Lookup
Prefixes an AS announces, plus its upstreams and downstreams.
open →Routing History
Who has originated a prefix over time, with a hijack check.
open →MAC Converter
Convert between Cisco, colon, hyphen and bare formats. Vendor lookup.
open →Subnet Calculator
IPv4 and IPv6 ranges, masks, wildcard and subnet splitting.
open →Check Host
Test reachability of a host from check-host.net nodes in many countries.
MAC Address Converter
Paste one MAC per line in any format. Every format is shown side by side.
| Cisco | Colon | Hyphen | Bare | Type | Vendor |
|---|
IP Subnet Calculator
IPv4 with CIDR or dotted mask (192.168.10.77/26 or 192.168.10.77 255.255.255.192), or IPv6 with prefix length.
RPKI Route Analyzer
Paste a BGP table (Cisco show ip bgp, MikroTik route print, or simple "prefix AS" lines). Each prefix and its origin AS are validated against RPKI through RIPEstat.
BGP Map
AS paths seen by RIPE RIS route collectors for a prefix or IP. The origin AS is at the bottom. Hover an AS to trace its links.
ASN Lookup
Prefixes originated by an AS and its neighbours as seen by RIPE RIS. Upstreams are ASes to the left of it in AS paths (closer to the rest of the internet); downstreams are to the right.
Routing History
Every AS that has originated a prefix (and its more-specifics) over time, compared with what RIS collectors see right now and with RPKI.