Networking
IP geolocation, MAC address lookup, DNS, subnet, and other browser-native network tools.
11 tools available
Networking tools cover the everyday lookups and calculations of working with IP networks: subnet and CIDR maths, IP and MAC address inspection, DNS record concepts, port references, and address-format conversions. They make the bit-level reality of networking visible without needing a terminal or a privileged command.
The cornerstone is subnetting. An IP address pairs with a mask that splits it into a network part and a host part; CIDR notation (/24) just says how many bits belong to the network. From that one fact you can derive the usable host range, broadcast address, and how many devices a block holds — the maths these calculators automate. The tools also decode the structure of MAC addresses (the vendor prefix) and clarify the private vs public ranges that sit behind every home and office NAT. It all runs in your browser using values you provide.
Private IPv4 ranges & common ports
| Reference | Value | Notes |
|---|---|---|
| Private (Class A) | 10.0.0.0/8 | Large internal networks |
| Private (Class B) | 172.16.0.0/12 | Medium networks |
| Private (Class C) | 192.168.0.0/16 | Home / small office |
| HTTP / HTTPS | 80 / 443 | Web traffic |
| DNS | 53 | Name resolution |
| SSH | 22 | Secure shell |
A /24 subnet holds 256 addresses — 254 usable after the network and broadcast addresses.