Is my IP address or network configuration sent to a server?

No. All IP bitwise subnetting calculations execute entirely inside your browser memory.

What CIDR prefix ranges are supported?

All standard IPv4 subnets from /0 up to /32 are supported.

Total IPs equals 2^(32 - CIDR). Usable hosts equals Total IPs minus 2 (excluding network and broadcast addresses).

Network & Webmaster Utilities

Calculate network address, broadcast address, subnet mask, usable host range, and total IPs from any IP and CIDR prefix.

100% Client-Side Subnetting Engine

IP Address (e.g. 192.168.1.1):

CIDR Slash Notation:

Presets:

Private NetworkClass C

Netmask

255.255.255.0

Wildcard Mask

0.0.0.255

Network IP

192.168.1.0/24

First Usable Host

192.168.1.1

Last Usable Host

192.168.1.254

Broadcast IP

192.168.1.255

Total Hosts

256

Usable Hosts

254

Binary Bitmask Breakdown

11000000101010000000000100000001

🔵 Network Portion: 24 bits⚪ Host Portion: 8 bits

Subnet Mask Binary11111111.11111111.11111111.00000000

Feature	SearchZee (IPv4 & CIDR Subnet Calculator)	Typical Online Tools
Sign-up required	✓ None — use it immediately	Account or email required
Usage limits	✓ Unlimited, no daily caps	Free-tier caps & paywalls
Cost	✓ Free, no paid tier	Freemium upsells
Ads	✓ No ads, no sponsored results	Ad-supported
Speed	⚡ Instant — runs in your browser	Upload, queue, wait