Subnetting Practice for IT Students

Check your subnetting homework and CCNA practice problems instantly.

Nessun accesso richiesto

IPv4 address

Prefix

/0/8/16/24/32

254

Usable hosts

256

Total addresses

Network address192.168.1.0/24

Usable host range192.168.1.1 – 192.168.1.254

Broadcast address192.168.1.255

Subnet mask255.255.255.0

Wildcard mask0.0.0.255

Mask (binary)11111111.11111111.11111111.00000000

IP classC

Address typePrivate (RFC 1918)

IPv4 subnetting reference. /31 and /32 are handled per RFC 3021 (point-to-point and single-host). All math runs locally in your browser.

IT Students tips

🎓

Studying for CCNA / Network+? Work the problem by hand, then verify network, broadcast, and host range here.

💡

The binary mask and wildcard mask help connect the dot-decimal notation to what's happening bit-by-bit.

🎯

Practice the /25, /26, /27, /28 boundaries — these are the most common exam questions.

Come funziona

Inserisci

Enter your data into the tool above. Everything stays local to your browser.

Elabora

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Scarica

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Perché il nostro?

✓Completamente gratuito — nessun costo nascosto, mai

✓Nessun account, email o accesso richiesto

✓I file non lasciano mai il tuo dispositivo

✓Assolutamente nessun limite di dimensione file

✓Nessuna filigrana su nessun output

Also check out…

🖧

Subnet Planning for Network Admins

Plan IP allocation, calculate usable hosts, and si

🏠

Home Lab & Self-Hosting Subnets

Plan IP ranges for your home network, VLANs, Docke

☁️

Plan Cloud VPC CIDR Blocks

Size AWS/GCP/Azure VPC and subnet CIDR ranges befo

🛡️

CIDR Ranges for Firewall Rules

Convert IP ranges to CIDR notation for firewall al

Domande frequenti

Back to Subnet / CIDR Calculator