CIDR Prefix: /3
CIDR Prefix Reference Guide
The /3 CIDR prefix represents a subnet block with a netmask of 224.0.0.0, allocating a total of 536,870,912 IP addresses.
224.0.0.0
31.255.255.255
536,870,910
536,870,912
11100000.00000000.00000000.00000000
Supernet
How to use this CIDR reference
1. Match Routing Limits: Check netmask binary allocations to determine subnet partition boundaries.
2. Size Host Tiers: Evaluate the usable hosts metrics to verify if the block matches host requirements.
3. Firewall Mapping: Use the wildcard mask values to write access control rules (ACLs) in networking equipment.
Understanding Prefix Networking Size
CIDR (Classless Inter-Domain Routing) prefixes represent the allocation size of subnetworks. The numeric prefix (/3) specifies the number of active routing identifier bits. The remaining host bits address connecting endpoints. Netmask and wildcard values are standard mappings required to write network forwarding tables, routing policies, and local system firewalls.