Network Address
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Broadcast Address
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Subnet Mask
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Wildcard Mask
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Usable Host Range
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Standard Usable Hosts
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Cloud Usable IPs (AWS/GCP -5)
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IP Class / Type
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Client-side IPv4 CIDR breakdown, binary network/host bit representation, and VPC subnet division planner.
Divide this CIDR block into equal smaller subnets:
| Subnet CIDR | Network IP | Usable Host Range | Broadcast IP | Action |
|---|
Classless Inter-Domain Routing (CIDR) replaced traditional Class A, B, and C network categories in 1993 (RFC 1519). A CIDR block represents an IP address followed by a suffix designating the number of leading bits allocated for the Network Identifier, leaving the remainder for Host Allocations.
When planning Virtual Private Clouds (VPC) in public cloud environments, remember that cloud providers automatically reserve 5 IP addresses per subnet block:
.0: Network Address.1: VPC Local Router Gateway.2: Cloud DNS Server.3: Future Feature Reservation.255: Network Broadcast Address (in /24 blocks)