/13 Subnet Mask (255.248.0.0)
| Prefix | /13 |
|---|---|
| Subnet mask | 255.248.0.0 |
| Wildcard mask | 0.7.255.255 |
| Binary mask | 11111111.11111000.00000000.00000000 |
| Total addresses | 524,288 |
| Usable hosts | 524,286 |
| Host bits | 19 |
| Subnets of /13 in a /8 | 32 |
e.g. 10.0.0.5/22 or 10.0.0.5 255.255.252.0
| Network address | 10.0.0.0 | |
|---|---|---|
| Broadcast address | 10.7.255.255 | |
| First usable host | 10.0.0.1 | |
| Last usable host | 10.7.255.254 | |
| Total addresses | 524,288 | |
| Usable hosts | 524,286 | |
| Subnet mask | 255.248.0.0 | |
| Wildcard mask | 0.7.255.255 | |
| CIDR notation | 10.0.0.0/13 | |
| IP class | Class A (legacy) | |
| Address type | Private (RFC 1918) | |
| IP address (binary) | 00001010.00000000.00000000.00000000 | |
| Subnet mask (binary) | 11111111.11111000.00000000.00000000 |
■ network bits ■ host bits
| Requested hosts | CIDR | First host | Last host | Broadcast | Usable hosts |
|---|
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What is a /13 subnet?
A /13 subnet uses the first 13 bits of an IPv4 address for the network and leaves 19 bits for hosts. Its subnet mask is 255.248.0.0, and it contains 2¹⁹ = 524,288 addresses, of which 524,286 can be assigned to devices. Typical use: Eight /16s; a size used to reserve address space for a group of VPCs or a large site. Use the subnet calculator above to check any /13 network.
/13 subnet example
For 10.0.0.0/13: network address 10.0.0.0, usable hosts 10.0.0.1 – 10.7.255.254, broadcast address 10.7.255.255, wildcard mask 0.7.255.255.
Frequently asked questions
How many usable IPs are in a /13?
524,286. The block has 524,288 addresses; the first is the network address and the last is the broadcast address.
What is the subnet mask for /13?
255.248.0.0, or 11111111.11111000.00000000.00000000 in binary.
How many /13 subnets are in a /8?
32 (2⁵), because a /13 uses 5 more network bits than a /8.
What is the difference between /13 and /12?
A /12 (255.240.0.0) is twice as large: 1,048,576 addresses and 1,048,574 usable hosts, spanning two consecutive /13 blocks such as 10.0.0.0–10.15.255.255.