IP Subnet Calculator — CIDR → Mask, Range & Hosts
Network homework or office VLAN planning: one input gives the full subnet breakdown, instantly.
Quick answer: Free subnet calculator: enter IP/CIDR (e.g. 192.168.1.0/26) — get mask, wildcard, network, broadcast, first/last host and count.
How to use
- Type IP + CIDR (a.b.c.d/n).
- Read the full breakdown live.
About this tool
Slash-notation is compact but opaque. Type 10.0.0.0/26 and instantly see /26's mask (255.255.255.192), its 64 addresses, usable hosts, network and broadcast addresses — the math network admins do daily, done honestly with real bit arithmetic.
FAQ
What does /26 mean?
Why two fewer hosts?
Private ranges?
IPv6?
Is it exact?
Offline?
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The complete ip subnet calculator guide
Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Ip Subnet Calculator — Complete Guide, Mistakes & FAQ covers all of it step by step.
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