Free tool · Routing & Aggregation

Route Summarization

Aggregate a list of networks into the fewest summary routes.

Aggregate routes (exact — same address space)
192.168.0.0/22
4 networks → 1 aggregate (1,024 addresses)
Single summary route192.168.0.0/22
Summary covers1,024 addresses
Extra addresses includednone — exact fit

About this tool

Free route summarization and supernet calculator. Paste a list of networks and get the minimal set of aggregate CIDR blocks that cover exactly the same address space, plus the single summary route — essential for BGP and OSPF aggregation. Everything runs entirely in your browser — nothing you type is sent to a server.

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