Free Online Network Tools - Subnet Calculator, MAC Lookup & More
Free online network tools including subnet calculator, MAC address vendor lookup, bandwidth unit converter, and common TCP/UDP port reference. Essential tools for IT professionals.
Essential network tools for IT professionals, system administrators, and CCTV installers. All tools run entirely in your browser — no data is uploaded to any server.
Available Tools
- Subnet Calculator — calculate network address, broadcast, usable range, and hosts from any IP/CIDR
- MAC Address Lookup — identify device manufacturers by OUI prefix
- Bandwidth Converter — convert between Mbps, Gbps, MB/s, and other data rate units
- Port Number Lookup — search common TCP/UDP ports by number or service name
Advertisement
🕸️ All Network Tools
Bandwidth Converter
Free online bandwidth and data rate converter. Convert between Mbps, Gbps, MB/s, GB/s, Kbps, and more. Ideal for network planning and bandwidth calculations.
MAC Address Lookup
Free online MAC address vendor lookup. Enter any MAC address to identify the manufacturer. Search by OUI (first 6 hex digits) to find device vendor information.
Port Number Lookup
Free online port number lookup. Search common TCP and UDP port numbers. Quick reference for well-known ports used by HTTP, HTTPS, SSH, FTP, DNS, DHCP, and more.
Subnet Calculator
Free online subnet calculator. Calculate network address, broadcast address, usable host range, subnet mask, and total hosts from any IP/CIDR notation. IPv4 supported.
Advertisement