ToolHub
Home › Dev Tools › CIDR Merge

CIDR Merge online

Merge overlapping/adjacent CIDRs into a minimal set.

Related tools

IP / CIDR Calculator Calculate an IPv4 subnet from CIDR: network, broadcast, host range, netmask, and host count. User-Agent Parser Parse a User-Agent string to identify the operating system, browser, and device. DNS Lookup Look up DNS records (A, AAAA, MX, TXT, CNAME, NS...) via DNS-over-HTTPS. WHOIS Lookup Look up domain and IP registration info via RDAP. What Is My IP See your public IP address along with its location (GeoIP). API Tester Send HTTP requests (GET/POST/PUT...) like a mini Postman.
🔒 CIDR Merge online runs entirely in your browser — the data you enter is not sent to any server. Free, no sign-up required. See446 free dev tools more.