10.0.0.0/10

Private (RFC 1918) RFC 1918

Class A — /10 prefix — 4,194,302 usable hosts

Network Address

10.0.0.0

Broadcast Address

10.63.255.255

Subnet Mask

255.192.0.0

Usable Hosts

4,194,302

First Usable IP

10.0.0.1

Last Usable IP

10.63.255.254

Total IPs

4,194,304

Prefix Length

/10

Network address — the base address of the block (10.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 10.63.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 4,194,302 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.192.0.0 is the dotted-decimal equivalent of /10. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	10.0.0.0/10
Network Address	10.0.0.0
Broadcast Address	10.63.255.255
Subnet Mask	255.192.0.0
Wildcard Mask	0.63.255.255
Prefix Length	/10
IP Address Class	Class A
Total IP Addresses	4,194,304
Usable Host Addresses	4,194,302
First Usable IP	10.0.0.1
Last Usable IP	10.63.255.254
Network (Hex)	0x0A000000
Broadcast (Hex)	0x0A3FFFFF
Governing RFC	RFC 1918
Address Type	Private (RFC 1918)

Binary Representation

Network Address

00001010 00001010.00000000.00000000.00000000

Subnet Mask

11111111.11000000.00000000.00000000

The first 10 bits (1s in the mask) identify the network. The remaining 22 bits identify hosts within the network.

Split into Equal Subnets

Split 10.0.0.0/10 into 2 equal /11 subnets (2,097,150 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.0.0.0/11	10.0.0.0	10.0.0.1	10.31.255.254	10.31.255.255	2,097,150
2	10.32.0.0/11	10.32.0.0	10.32.0.1	10.63.255.254	10.63.255.255	2,097,150

Split 10.0.0.0/10 into 4 equal /12 subnets (1,048,574 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.0.0.0/12	10.0.0.0	10.0.0.1	10.15.255.254	10.15.255.255	1,048,574
2	10.16.0.0/12	10.16.0.0	10.16.0.1	10.31.255.254	10.31.255.255	1,048,574
3	10.32.0.0/12	10.32.0.0	10.32.0.1	10.47.255.254	10.47.255.255	1,048,574
4	10.48.0.0/12	10.48.0.0	10.48.0.1	10.63.255.254	10.63.255.255	1,048,574

Split 10.0.0.0/10 into 8 equal /13 subnets (524,286 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.0.0.0/13	10.0.0.0	10.0.0.1	10.7.255.254	10.7.255.255	524,286
2	10.8.0.0/13	10.8.0.0	10.8.0.1	10.15.255.254	10.15.255.255	524,286
3	10.16.0.0/13	10.16.0.0	10.16.0.1	10.23.255.254	10.23.255.255	524,286
4	10.24.0.0/13	10.24.0.0	10.24.0.1	10.31.255.254	10.31.255.255	524,286
5	10.32.0.0/13	10.32.0.0	10.32.0.1	10.39.255.254	10.39.255.255	524,286
6	10.40.0.0/13	10.40.0.0	10.40.0.1	10.47.255.254	10.47.255.255	524,286
7	10.48.0.0/13	10.48.0.0	10.48.0.1	10.55.255.254	10.55.255.255	524,286
8	10.56.0.0/13	10.56.0.0	10.56.0.1	10.63.255.254	10.63.255.255	524,286

Split 10.0.0.0/10 into 16 equal /14 subnets (262,142 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.0.0.0/14	10.0.0.0	10.0.0.1	10.3.255.254	10.3.255.255	262,142
2	10.4.0.0/14	10.4.0.0	10.4.0.1	10.7.255.254	10.7.255.255	262,142
3	10.8.0.0/14	10.8.0.0	10.8.0.1	10.11.255.254	10.11.255.255	262,142
4	10.12.0.0/14	10.12.0.0	10.12.0.1	10.15.255.254	10.15.255.255	262,142
5	10.16.0.0/14	10.16.0.0	10.16.0.1	10.19.255.254	10.19.255.255	262,142
6	10.20.0.0/14	10.20.0.0	10.20.0.1	10.23.255.254	10.23.255.255	262,142
7	10.24.0.0/14	10.24.0.0	10.24.0.1	10.27.255.254	10.27.255.255	262,142
8	10.28.0.0/14	10.28.0.0	10.28.0.1	10.31.255.254	10.31.255.255	262,142
9	10.32.0.0/14	10.32.0.0	10.32.0.1	10.35.255.254	10.35.255.255	262,142
10	10.36.0.0/14	10.36.0.0	10.36.0.1	10.39.255.254	10.39.255.255	262,142
11	10.40.0.0/14	10.40.0.0	10.40.0.1	10.43.255.254	10.43.255.255	262,142
12	10.44.0.0/14	10.44.0.0	10.44.0.1	10.47.255.254	10.47.255.255	262,142
13	10.48.0.0/14	10.48.0.0	10.48.0.1	10.51.255.254	10.51.255.255	262,142
14	10.52.0.0/14	10.52.0.0	10.52.0.1	10.55.255.254	10.55.255.255	262,142
15	10.56.0.0/14	10.56.0.0	10.56.0.1	10.59.255.254	10.59.255.255	262,142
16	10.60.0.0/14	10.60.0.0	10.60.0.1	10.63.255.254	10.63.255.255	262,142

/10 Subnet Reference

Total IPs 4,194,304

Usable Hosts 4,194,302

Subnet Mask 255.192.0.0

Wildcard 0.63.255.255

Full /10 reference →

Related Ranges

Parent /9 block 10.0.0.0/9 Sibling /10 block 10.64.0.0/10

Adjacent Prefix Sizes

/8 16,777,214 hosts /9 8,388,606 hosts /10 4,194,302 hosts /11 2,097,150 hosts /12 1,048,574 hosts