140.0.0.0/7

Public

Class B — /7 prefix — 33,554,430 usable hosts

Network Address

140.0.0.0

Broadcast Address

141.255.255.255

Subnet Mask

254.0.0.0

Usable Hosts

33,554,430

First Usable IP

140.0.0.1

Last Usable IP

141.255.255.254

Total IPs

33,554,432

Prefix Length

Network address — the base address of the block (140.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 141.255.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 33,554,430 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 254.0.0.0 is the dotted-decimal equivalent of /7. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	140.0.0.0/7
Network Address	140.0.0.0
Broadcast Address	141.255.255.255
Subnet Mask	254.0.0.0
Wildcard Mask	1.255.255.255
Prefix Length	/7
IP Address Class	Class B
Total IP Addresses	33,554,432
Usable Host Addresses	33,554,430
First Usable IP	140.0.0.1
Last Usable IP	141.255.255.254
Network (Hex)	0x8C000000
Broadcast (Hex)	0x8DFFFFFF
Address Type	Public / Globally Routable

Binary Representation

Network Address

100011 10001100.00000000.00000000.00000000

Subnet Mask

11111110.00000000.00000000.00000000

The first 7 bits (1s in the mask) identify the network. The remaining 25 bits identify hosts within the network.

Split into Equal Subnets

Split 140.0.0.0/7 into 2 equal /8 subnets (16,777,214 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	140.0.0.0/8	140.0.0.0	140.0.0.1	140.255.255.254	140.255.255.255	16,777,214
2	141.0.0.0/8	141.0.0.0	141.0.0.1	141.255.255.254	141.255.255.255	16,777,214

Split 140.0.0.0/7 into 4 equal /9 subnets (8,388,606 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	140.0.0.0/9	140.0.0.0	140.0.0.1	140.127.255.254	140.127.255.255	8,388,606
2	140.128.0.0/9	140.128.0.0	140.128.0.1	140.255.255.254	140.255.255.255	8,388,606
3	141.0.0.0/9	141.0.0.0	141.0.0.1	141.127.255.254	141.127.255.255	8,388,606
4	141.128.0.0/9	141.128.0.0	141.128.0.1	141.255.255.254	141.255.255.255	8,388,606

Split 140.0.0.0/7 into 8 equal /10 subnets (4,194,302 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	140.0.0.0/10	140.0.0.0	140.0.0.1	140.63.255.254	140.63.255.255	4,194,302
2	140.64.0.0/10	140.64.0.0	140.64.0.1	140.127.255.254	140.127.255.255	4,194,302
3	140.128.0.0/10	140.128.0.0	140.128.0.1	140.191.255.254	140.191.255.255	4,194,302
4	140.192.0.0/10	140.192.0.0	140.192.0.1	140.255.255.254	140.255.255.255	4,194,302
5	141.0.0.0/10	141.0.0.0	141.0.0.1	141.63.255.254	141.63.255.255	4,194,302
6	141.64.0.0/10	141.64.0.0	141.64.0.1	141.127.255.254	141.127.255.255	4,194,302
7	141.128.0.0/10	141.128.0.0	141.128.0.1	141.191.255.254	141.191.255.255	4,194,302
8	141.192.0.0/10	141.192.0.0	141.192.0.1	141.255.255.254	141.255.255.255	4,194,302

Split 140.0.0.0/7 into 16 equal /11 subnets (2,097,150 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	140.0.0.0/11	140.0.0.0	140.0.0.1	140.31.255.254	140.31.255.255	2,097,150
2	140.32.0.0/11	140.32.0.0	140.32.0.1	140.63.255.254	140.63.255.255	2,097,150
3	140.64.0.0/11	140.64.0.0	140.64.0.1	140.95.255.254	140.95.255.255	2,097,150
4	140.96.0.0/11	140.96.0.0	140.96.0.1	140.127.255.254	140.127.255.255	2,097,150
5	140.128.0.0/11	140.128.0.0	140.128.0.1	140.159.255.254	140.159.255.255	2,097,150
6	140.160.0.0/11	140.160.0.0	140.160.0.1	140.191.255.254	140.191.255.255	2,097,150
7	140.192.0.0/11	140.192.0.0	140.192.0.1	140.223.255.254	140.223.255.255	2,097,150
8	140.224.0.0/11	140.224.0.0	140.224.0.1	140.255.255.254	140.255.255.255	2,097,150
9	141.0.0.0/11	141.0.0.0	141.0.0.1	141.31.255.254	141.31.255.255	2,097,150
10	141.32.0.0/11	141.32.0.0	141.32.0.1	141.63.255.254	141.63.255.255	2,097,150
11	141.64.0.0/11	141.64.0.0	141.64.0.1	141.95.255.254	141.95.255.255	2,097,150
12	141.96.0.0/11	141.96.0.0	141.96.0.1	141.127.255.254	141.127.255.255	2,097,150
13	141.128.0.0/11	141.128.0.0	141.128.0.1	141.159.255.254	141.159.255.255	2,097,150
14	141.160.0.0/11	141.160.0.0	141.160.0.1	141.191.255.254	141.191.255.255	2,097,150
15	141.192.0.0/11	141.192.0.0	141.192.0.1	141.223.255.254	141.223.255.255	2,097,150
16	141.224.0.0/11	141.224.0.0	141.224.0.1	141.255.255.254	141.255.255.255	2,097,150

/7 Subnet Reference

Total IPs 33,554,432

Usable Hosts 33,554,430

Subnet Mask 254.0.0.0

Wildcard 1.255.255.255

Full /7 reference →

Related Ranges

Parent /6 block 140.0.0.0/6 Sibling /7 block 142.0.0.0/7

Adjacent Prefix Sizes

/5 134,217,726 hosts /6 67,108,862 hosts /7 33,554,430 hosts /8 16,777,214 hosts /9 8,388,606 hosts