← All free tools
Free network tool
CIDR aggregation
Collapse a list of prefixes into the smallest equivalent set, or summarise into one route. Runs entirely in your browser — no project or account is required.
Prefixes
One per line.
In5
Out1
ExactYesCovers the same addresses
Aggregated
Merged only where two blocks are the true halves of one parent, so this never covers an address the input did not.
10.0.0.0/22Single summary route
One prefix covering everything — usually covers more than asked for.
- Summary
- 10.0.0.0/22
- Extra addresses covered
- 0