Worked example
Four complete adjacent /24 networks can be represented by one lossless /22 statement when policy permits.
BGP Prefix-List Generator
Automatically aggregate and compress a list of IP prefixes into a mathematically equivalent set of BGP prefix-lists. Uses lossless ge/le boundaries to reduce configuration size without accidentally permitting unauthorized subnets.
Paste the exact IPv4 subnets (e.g., 10.0.0.0/24) you want to permit.
Paste your IPv4 CIDR blocks above and click Generate Prefix-List
to calculate the optimal configuration.
How to use BGP Prefix-List Generator
Convert approved networks into vendor-specific prefix-list statements while preserving exact route-policy intent.
Common mistake
Permissive le/ge bounds may authorize more-specific routes that were not present in the source list.