131.128.0.0/10

Public

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

Network Address

131.128.0.0

Broadcast Address

131.191.255.255

Subnet Mask

255.192.0.0

Usable Hosts

4,194,302

First Usable IP

131.128.0.1

Last Usable IP

131.191.255.254

Total IPs

4,194,304

Prefix Length

/10

Network address — the base address of the block (131.128.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 131.191.255.255 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	131.128.0.0/10
Network Address	131.128.0.0
Broadcast Address	131.191.255.255
Subnet Mask	255.192.0.0
Wildcard Mask	0.63.255.255
Prefix Length	/10
IP Address Class	Class B
Total IP Addresses	4,194,304
Usable Host Addresses	4,194,302
First Usable IP	131.128.0.1
Last Usable IP	131.191.255.254
Network (Hex)	0x83800000
Broadcast (Hex)	0x83BFFFFF
Address Type	Public / Globally Routable

Binary Representation

Network Address

10000011 10000011.10000000.00000000.00000000

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 131.128.0.0/10 into 2 equal /11 subnets (2,097,150 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	131.128.0.0/11	131.128.0.0	131.128.0.1	131.159.255.254	131.159.255.255	2,097,150
2	131.160.0.0/11	131.160.0.0	131.160.0.1	131.191.255.254	131.191.255.255	2,097,150

Split 131.128.0.0/10 into 4 equal /12 subnets (1,048,574 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	131.128.0.0/12	131.128.0.0	131.128.0.1	131.143.255.254	131.143.255.255	1,048,574
2	131.144.0.0/12	131.144.0.0	131.144.0.1	131.159.255.254	131.159.255.255	1,048,574
3	131.160.0.0/12	131.160.0.0	131.160.0.1	131.175.255.254	131.175.255.255	1,048,574
4	131.176.0.0/12	131.176.0.0	131.176.0.1	131.191.255.254	131.191.255.255	1,048,574

Split 131.128.0.0/10 into 8 equal /13 subnets (524,286 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	131.128.0.0/13	131.128.0.0	131.128.0.1	131.135.255.254	131.135.255.255	524,286
2	131.136.0.0/13	131.136.0.0	131.136.0.1	131.143.255.254	131.143.255.255	524,286
3	131.144.0.0/13	131.144.0.0	131.144.0.1	131.151.255.254	131.151.255.255	524,286
4	131.152.0.0/13	131.152.0.0	131.152.0.1	131.159.255.254	131.159.255.255	524,286
5	131.160.0.0/13	131.160.0.0	131.160.0.1	131.167.255.254	131.167.255.255	524,286
6	131.168.0.0/13	131.168.0.0	131.168.0.1	131.175.255.254	131.175.255.255	524,286
7	131.176.0.0/13	131.176.0.0	131.176.0.1	131.183.255.254	131.183.255.255	524,286
8	131.184.0.0/13	131.184.0.0	131.184.0.1	131.191.255.254	131.191.255.255	524,286

Split 131.128.0.0/10 into 16 equal /14 subnets (262,142 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	131.128.0.0/14	131.128.0.0	131.128.0.1	131.131.255.254	131.131.255.255	262,142
2	131.132.0.0/14	131.132.0.0	131.132.0.1	131.135.255.254	131.135.255.255	262,142
3	131.136.0.0/14	131.136.0.0	131.136.0.1	131.139.255.254	131.139.255.255	262,142
4	131.140.0.0/14	131.140.0.0	131.140.0.1	131.143.255.254	131.143.255.255	262,142
5	131.144.0.0/14	131.144.0.0	131.144.0.1	131.147.255.254	131.147.255.255	262,142
6	131.148.0.0/14	131.148.0.0	131.148.0.1	131.151.255.254	131.151.255.255	262,142
7	131.152.0.0/14	131.152.0.0	131.152.0.1	131.155.255.254	131.155.255.255	262,142
8	131.156.0.0/14	131.156.0.0	131.156.0.1	131.159.255.254	131.159.255.255	262,142
9	131.160.0.0/14	131.160.0.0	131.160.0.1	131.163.255.254	131.163.255.255	262,142
10	131.164.0.0/14	131.164.0.0	131.164.0.1	131.167.255.254	131.167.255.255	262,142
11	131.168.0.0/14	131.168.0.0	131.168.0.1	131.171.255.254	131.171.255.255	262,142
12	131.172.0.0/14	131.172.0.0	131.172.0.1	131.175.255.254	131.175.255.255	262,142
13	131.176.0.0/14	131.176.0.0	131.176.0.1	131.179.255.254	131.179.255.255	262,142
14	131.180.0.0/14	131.180.0.0	131.180.0.1	131.183.255.254	131.183.255.255	262,142
15	131.184.0.0/14	131.184.0.0	131.184.0.1	131.187.255.254	131.187.255.255	262,142
16	131.188.0.0/14	131.188.0.0	131.188.0.1	131.191.255.254	131.191.255.255	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 131.128.0.0/9 Sibling /10 block 131.192.0.0/10

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