Understanding CIDR notation for IPv4 and IPv6 subnets
CIDR (Classless Inter-Domain Routing) notation is a compact method for specifying IP addresses and their routing suffix. This page provides detailed information about the /14 subnet.
Very large network with thousands to millions of hosts. Such large address blocks are typically managed by ISPs or very large corporations and are often subdivided extensively.
| CIDR Notation | /14 |
| Subnet Mask | 255.252.0.0 |
| Binary Subnet Mask | 11111111 11111100 00000000 00000000 |
| Total Addresses | 262,144 |
| Usable Hosts (Standard) | 262,142 |
| AWS Usable IPs | 262,137 (5 reserved) |
| Azure Usable IPs | 262,137 (5 reserved) |
| GCP Usable IPs | 262,138 (4 reserved) |
Large allocation typically used by regional registries or major ISPs
IPv6 uses a 128-bit address space, a massive increase from IPv4's 32 bits. This allows for approximately 340 undecillion (3.4 x 1038) unique addresses, effectively eliminating the address exhaustion concerns of IPv4.
IPv6 addresses are represented as eight groups of four hexadecimal digits, separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334). Leading zeros in each group can be omitted, and one sequence of consecutive all-zero groups can be replaced by a double colon (::), for instance 2001:db8::1.