Look up DNS records for any domain. View A, AAAA, MX, TXT, NS, and CNAME records using public DNS servers.
Subnet Calculator
Calculate IP subnets, network addresses, broadcast addresses, and available host ranges.
Free · No signup
/
More hostsFewer hosts
/0/8/16/24/32
Common Subnet Reference
| CIDR | Subnet Mask | Usable Hosts |
|---|---|---|
| /8 | 255.0.0.0 | 16,777,214 |
| /16 | 255.255.0.0 | 65,534 |
| /24 | 255.255.255.0 | 254 |
| /25 | 255.255.255.128 | 126 |
| /26 | 255.255.255.192 | 62 |
| /27 | 255.255.255.224 | 30 |
| /28 | 255.255.255.240 | 14 |
| /29 | 255.255.255.248 | 6 |
| /30 | 255.255.255.252 | 2 |
| /31 | 255.255.255.254 | 2 (P2P) |
| /32 | 255.255.255.255 | 1 |
100% Client-Side: All calculations are performed locally in your browser. No data is sent to any server. You can enter IP addresses with CIDR notation (e.g., 192.168.1.0/24) or separately.
Related tools
Useful next steps for this task
View your public IP address and network information. Detects IPv4 and IPv6 addresses.
Look up common port numbers and their associated services and protocols.
Identify the manufacturer and vendor from any MAC address using a comprehensive OUI database.
Parse and analyze URLs, extract components like protocol, host, path, query parameters, and more.