Generate random valid port numbers for testing. Filter by well-known, registered, or dynamic ranges. Exclude common ports.

Check port numbers and view common service ports database. Includes well-known, registered, and dynamic ports.

Generate random MAC addresses and validate format. Supports multiple notation styles for network configuration.

Validate IPv4 and IPv6 addresses with CIDR notation. Free online tool for network administrators and developers.

Calculate subnets, CIDR ranges, broadcast addresses, and host capacities. Free online subnet calculator for network engineers.