Agent X Alpha

CIDR Subnet Calculator

Client-SideOffline ReadyNo login required

Calculate network address, broadcast address, subnet mask, and usable host range from an IP and CIDR mask.

Presets:
RFC 1918 Private (Class C)

Netmask: 255.255.255.0 • Wildcard: 0.0.0.255

254 Usable Hosts

Network Address

192.168.1.0

Subnet root

Broadcast Address

192.168.1.255

Subnet broadcast

Subnet Mask

255.255.255.0

/24

Usable Host Range

192.168.1.1 - 192.168.1.254

Allocatable to NICs

Usable Hosts

254

Addresses available

Total Hosts

256

2^(32-prefix)

32-Bit Binary Bitmask Breakdown24 Network Bits / 8 Host Bits
IP Binary:
11000000101010000000000100000000
Mask Binary:
11111111111111111111111100000000
Subnet Division PlannerPartition this /24 network into smaller subnets for VPC subnets and routing.
Divide into:
#Subnet CIDRUsable Host RangeBroadcastUsable HostsCopy
1192.168.1.0/26192.168.1.1 - 192.168.1.62192.168.1.6362
2192.168.1.64/26192.168.1.65 - 192.168.1.126192.168.1.12762
3192.168.1.128/26192.168.1.129 - 192.168.1.190192.168.1.19162
4192.168.1.192/26192.168.1.193 - 192.168.1.254192.168.1.25562

Visual Subnet Planner

Dynamically divide parent CIDR blocks into smaller subnets for multi-tier AWS VPC, Azure VNet, and GCP architectures.

32-Bit Binary Bitmask

Color-coded binary breakdown isolating network prefix bits from allocatable host bits across all 4 octets.

RFC Scope & Architecture

Identifies RFC 1918 Private ranges, Carrier-Grade NAT (CGNAT), and supports modern RFC 3021 /31 point-to-point links.

Frequently Asked Questions

Is CIDR Subnet Calculator free to use?
Yes, CIDR Subnet Calculator is 100% free to use on AgentXAlpha. There are no subscriptions, registration requirements, or hidden daily limits.
How does CIDR Subnet Calculator protect my privacy and data?
CIDR Subnet Calculator executes entirely client-side inside your browser memory using modern Web APIs. Your input and files are never uploaded to any remote server or third party.
Does CIDR Subnet Calculator work on mobile devices?
Yes, CIDR Subnet Calculator is fully responsive and optimized for touchscreens and desktop screens alike across iOS, Android, macOS, Windows, and Linux.
What are the main features of CIDR Subnet Calculator?
Calculate network address, broadcast address, subnet mask, and usable host range from an IP and CIDR mask. It is engineered for fast, zero-latency execution directly in your browser.
Recommended For You

More Network Utilities

View all Network tools
Network

DNS Lookup

Query A, AAAA, MX, CNAME, TXT, NS, SOA records for any domain via Cloudflare DNS-over-HTTPS.

Network APILaunch
Network

IP & Domain Intelligence

What is my IP, GeoIP lookup, ISP & ASN routing, domain-to-IP DNS resolution, domain WHOIS & RDAP lookup, and reverse IP host discovery.

Network APILaunch
Network

Email Header Analyzer

Trace email delivery paths, check SPF/DKIM/DMARC, and detect delays or spoofing.

Client-SideLaunch