🔍 Find IP Address Class & Type – IPv4 Lookup Tool
Enter any IPv4 address to check if it’s public or private, and learn which IP class it belongs to (A, B, C, D, or E).
📘 IP Address Classes Explained
This table provides an overview of IPv4 address classes, including their ranges, usage, subnet masks, and host capacity.
| Class | IP Range | Default Subnet Mask | Host per Network | Usage |
|---|---|---|---|---|
| Class A | 1.0.0.0 – 126.255.255.255 | 255.0.0.0 | 16 million+ | Public & Private (e.g., 10.0.0.0/8) |
| Class B | 128.0.0.0 – 191.255.255.255 | 255.255.0.0 | 65,000+ | Public & Private (e.g., 172.16.0.0/12) |
| Class C | 192.0.0.0 – 223.255.255.255 | 255.255.255.0 | 254 | Public & Private (e.g., 192.168.0.0/16) |
| Class D | 224.0.0.0 – 239.255.255.255 | N/A | Multicast | Used for multicast groups |
| Class E | 240.0.0.0 – 255.255.255.255 | N/A | Reserved | Experimental use only |