Longest Prefix Match Visualizer
Visualize which IPv4 or IPv6 routes contain an address and highlight every equally specific longest-prefix match.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
Avoid live production secrets; use dummy or masked data where possible. Data handling details
Matching routes
How it works
Enter one address and a route list. Each line begins with a prefix and may have a free-text label. Matching routes are ordered by prefix length and visualized by specificity. If several routes have the same longest prefix, all remain highlighted: LPM alone cannot choose among them, because a real routing table uses protocol preference, metric, attributes, and ECMP rules. Routes from the other address family are valid but do not match. This tool does not read the host routing table.