10.48.0.0/12

Private (RFC 1918) RFC 1918

Class A — /12 prefix — 1,048,574 usable hosts

Network Address

10.48.0.0

Broadcast Address

10.63.255.255

Subnet Mask

255.240.0.0

Usable Hosts

1,048,574

First Usable IP

10.48.0.1

Last Usable IP

10.63.255.254

Total IPs

1,048,576

Prefix Length

/12

Network address — the base address of the block (10.48.0.0). 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 1,048,574 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.240.0.0 is the dotted-decimal equivalent of /12. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	10.48.0.0/12
Network Address	10.48.0.0
Broadcast Address	10.63.255.255
Subnet Mask	255.240.0.0
Wildcard Mask	0.15.255.255
Prefix Length	/12
IP Address Class	Class A
Total IP Addresses	1,048,576
Usable Host Addresses	1,048,574
First Usable IP	10.48.0.1
Last Usable IP	10.63.255.254
Network (Hex)	0x0A300000
Broadcast (Hex)	0x0A3FFFFF
Governing RFC	RFC 1918
Address Type	Private (RFC 1918)

Binary Representation

Network Address

00001010 00001010.00110000.00000000.00000000

Subnet Mask

11111111.11110000.00000000.00000000

The first 12 bits (1s in the mask) identify the network. The remaining 20 bits identify hosts within the network.

Split into Equal Subnets

Split 10.48.0.0/12 into 2 equal /13 subnets (524,286 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.48.0.0/13	10.48.0.0	10.48.0.1	10.55.255.254	10.55.255.255	524,286
2	10.56.0.0/13	10.56.0.0	10.56.0.1	10.63.255.254	10.63.255.255	524,286

Split 10.48.0.0/12 into 4 equal /14 subnets (262,142 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.48.0.0/14	10.48.0.0	10.48.0.1	10.51.255.254	10.51.255.255	262,142
2	10.52.0.0/14	10.52.0.0	10.52.0.1	10.55.255.254	10.55.255.255	262,142
3	10.56.0.0/14	10.56.0.0	10.56.0.1	10.59.255.254	10.59.255.255	262,142
4	10.60.0.0/14	10.60.0.0	10.60.0.1	10.63.255.254	10.63.255.255	262,142

Split 10.48.0.0/12 into 8 equal /15 subnets (131,070 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.48.0.0/15	10.48.0.0	10.48.0.1	10.49.255.254	10.49.255.255	131,070
2	10.50.0.0/15	10.50.0.0	10.50.0.1	10.51.255.254	10.51.255.255	131,070
3	10.52.0.0/15	10.52.0.0	10.52.0.1	10.53.255.254	10.53.255.255	131,070
4	10.54.0.0/15	10.54.0.0	10.54.0.1	10.55.255.254	10.55.255.255	131,070
5	10.56.0.0/15	10.56.0.0	10.56.0.1	10.57.255.254	10.57.255.255	131,070
6	10.58.0.0/15	10.58.0.0	10.58.0.1	10.59.255.254	10.59.255.255	131,070
7	10.60.0.0/15	10.60.0.0	10.60.0.1	10.61.255.254	10.61.255.255	131,070
8	10.62.0.0/15	10.62.0.0	10.62.0.1	10.63.255.254	10.63.255.255	131,070

Split 10.48.0.0/12 into 16 equal /16 subnets (65,534 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	10.48.0.0/16	10.48.0.0	10.48.0.1	10.48.255.254	10.48.255.255	65,534
2	10.49.0.0/16	10.49.0.0	10.49.0.1	10.49.255.254	10.49.255.255	65,534
3	10.50.0.0/16	10.50.0.0	10.50.0.1	10.50.255.254	10.50.255.255	65,534
4	10.51.0.0/16	10.51.0.0	10.51.0.1	10.51.255.254	10.51.255.255	65,534
5	10.52.0.0/16	10.52.0.0	10.52.0.1	10.52.255.254	10.52.255.255	65,534
6	10.53.0.0/16	10.53.0.0	10.53.0.1	10.53.255.254	10.53.255.255	65,534
7	10.54.0.0/16	10.54.0.0	10.54.0.1	10.54.255.254	10.54.255.255	65,534
8	10.55.0.0/16	10.55.0.0	10.55.0.1	10.55.255.254	10.55.255.255	65,534
9	10.56.0.0/16	10.56.0.0	10.56.0.1	10.56.255.254	10.56.255.255	65,534
10	10.57.0.0/16	10.57.0.0	10.57.0.1	10.57.255.254	10.57.255.255	65,534
11	10.58.0.0/16	10.58.0.0	10.58.0.1	10.58.255.254	10.58.255.255	65,534
12	10.59.0.0/16	10.59.0.0	10.59.0.1	10.59.255.254	10.59.255.255	65,534
13	10.60.0.0/16	10.60.0.0	10.60.0.1	10.60.255.254	10.60.255.255	65,534
14	10.61.0.0/16	10.61.0.0	10.61.0.1	10.61.255.254	10.61.255.255	65,534
15	10.62.0.0/16	10.62.0.0	10.62.0.1	10.62.255.254	10.62.255.255	65,534
16	10.63.0.0/16	10.63.0.0	10.63.0.1	10.63.255.254	10.63.255.255	65,534

/12 Subnet Reference

Total IPs 1,048,576

Usable Hosts 1,048,574

Subnet Mask 255.240.0.0

Wildcard 0.15.255.255

Full /12 reference →

Related Ranges

Parent /11 block 10.32.0.0/11 Sibling /12 block 10.32.0.0/12

Adjacent Prefix Sizes

/10 4,194,302 hosts /11 2,097,150 hosts /12 1,048,574 hosts /13 524,286 hosts /14 262,142 hosts