What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

DevFreeBy Daniel BeglaryanUpdated August 2026

Subnet Calculator

Work out the network, broadcast, usable host range, and address count for any IPv4 or IPv6 CIDR block.

PrivateWorks OfflineNo Account

IP version

IP address

You can also paste address/prefix here.

CIDR prefix or subnet mask

Network

192.168.1.0/24

Broadcast

192.168.1.255

Usable hosts

254

Subnet mask

255.255.255.0

IPv4 subnet details

CIDR notation	192.168.1.0/24
Netmask	255.255.255.0
Wildcard mask	0.0.0.255
Network address	192.168.1.0
Broadcast address	192.168.1.255
First usable host	192.168.1.1
Last usable host	192.168.1.254
Host address range	192.168.1.1 – 192.168.1.254
Total addresses	256
Usable hosts	254
IP class	Class C
Address type	Private (RFC 1918)
Netmask (binary)	11111111.11111111.11111111.00000000

Everything is computed in your browser — the address you type never leaves your device.

Deep dive

About Subnet Calculator.

Calculate Any IPv4 or IPv6 Subnet

Enter an IP address with a CIDR prefix — or an IPv4 subnet mask — and get the network address, broadcast address, first and last usable host, total and usable host counts, the wildcard mask, and the full address range, updated live as you type.

IPv4 is computed with exact 32-bit integer math and IPv6 with 128-bit BigInt math, so even a /0 or a /48 reports the correct address count without rounding. It also handles the edge cases many calculators skip: /31 point-to-point links (RFC 3021), /32 single hosts, private, loopback, and link-local ranges, and :: zero-compression in IPv6.

One honest note on IPv6: it has no broadcast address and does not reserve the first and last host, so the whole prefix is reported as usable — that is expected behavior, not a missing feature.

Plan a network: pick a prefix and see exactly how many usable hosts it gives you before you commit an addressing scheme.
Firewall and ACL rules: turn a CIDR block into its precise host range and wildcard mask for router, firewall, and access-list configs.
Study for certs: check your subnetting answers for CCNA, Network+, or a networking class in seconds.
IPv6 addressing: work out the network and range for a /48, /56, or /64 delegation and read the compressed and expanded forms side by side.
Troubleshoot: confirm whether two addresses fall inside the same subnet by comparing their network addresses.
Convert mask to CIDR: paste a dotted subnet mask like 255.255.255.0 and read back the equivalent /24 prefix.

Privacy: This calculator runs entirely in your browser. The addresses and prefixes you enter never leave your device — nothing is uploaded, logged, or stored, which matters when you are working with internal or client network details.

Three steps