Network Tools
Calculate subnets, validate IP addresses, convert between IP formats, check port assignments, and reference DNS records. Essential tools for network engineers, system administrators, and DevOps teams.
🔗Domain Name Validator
Validate domain names against RFC 1035 rules: length, characters, labels, and TLD.
⇄IP Address Converter
Convert IPv4 addresses between dotted decimal, binary, hexadecimal, and integer formats.
✓IP Address Validator
Validate IPv4 and IPv6 addresses with class, scope, and private/public detection.
↔IP Subnet Range Calculator
Calculate CIDR notation, total IPs, and subnet mask from a start and end IP address.
⬡Port Number Reference
Searchable reference of well-known TCP/UDP port numbers and their services.
🌐Subnet Calculator
Calculate network address, broadcast, hosts, and subnet mask from IP/CIDR notation.
FAQ
- How do I calculate subnets?
- Enter an IP address and subnet mask (CIDR notation or dotted decimal). The subnet calculator shows network address, broadcast address, usable host range, and subnet details.
- What port information is available?
- The port reference tool lists common ports (1-1024) with their assigned services. Search by port number or service name to find which ports are used by specific protocols and applications.