240.0.0.0/7

Public

Class E (Reserved) — /7 prefix — 33,554,430 usable hosts

Network Address

240.0.0.0

Broadcast Address

241.255.255.255

Subnet Mask

254.0.0.0

Usable Hosts

33,554,430

First Usable IP

240.0.0.1

Last Usable IP

241.255.255.254

Total IPs

33,554,432

Prefix Length

Network address — the base address of the block (240.0.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 241.255.255.255 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	240.0.0.0/7
Network Address	240.0.0.0
Broadcast Address	241.255.255.255
Subnet Mask	254.0.0.0
Wildcard Mask	1.255.255.255
Prefix Length	/7
IP Address Class	Class E (Reserved)
Total IP Addresses	33,554,432
Usable Host Addresses	33,554,430
First Usable IP	240.0.0.1
Last Usable IP	241.255.255.254
Network (Hex)	0xF0000000
Broadcast (Hex)	0xF1FFFFFF
Address Type	Public / Globally Routable

Binary Representation

Network Address

111100 11110000.00000000.00000000.00000000

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 240.0.0.0/7 into 2 equal /8 subnets (16,777,214 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	240.0.0.0/8	240.0.0.0	240.0.0.1	240.255.255.254	240.255.255.255	16,777,214
2	241.0.0.0/8	241.0.0.0	241.0.0.1	241.255.255.254	241.255.255.255	16,777,214

Split 240.0.0.0/7 into 4 equal /9 subnets (8,388,606 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	240.0.0.0/9	240.0.0.0	240.0.0.1	240.127.255.254	240.127.255.255	8,388,606
2	240.128.0.0/9	240.128.0.0	240.128.0.1	240.255.255.254	240.255.255.255	8,388,606
3	241.0.0.0/9	241.0.0.0	241.0.0.1	241.127.255.254	241.127.255.255	8,388,606
4	241.128.0.0/9	241.128.0.0	241.128.0.1	241.255.255.254	241.255.255.255	8,388,606

Split 240.0.0.0/7 into 8 equal /10 subnets (4,194,302 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	240.0.0.0/10	240.0.0.0	240.0.0.1	240.63.255.254	240.63.255.255	4,194,302
2	240.64.0.0/10	240.64.0.0	240.64.0.1	240.127.255.254	240.127.255.255	4,194,302
3	240.128.0.0/10	240.128.0.0	240.128.0.1	240.191.255.254	240.191.255.255	4,194,302
4	240.192.0.0/10	240.192.0.0	240.192.0.1	240.255.255.254	240.255.255.255	4,194,302
5	241.0.0.0/10	241.0.0.0	241.0.0.1	241.63.255.254	241.63.255.255	4,194,302
6	241.64.0.0/10	241.64.0.0	241.64.0.1	241.127.255.254	241.127.255.255	4,194,302
7	241.128.0.0/10	241.128.0.0	241.128.0.1	241.191.255.254	241.191.255.255	4,194,302
8	241.192.0.0/10	241.192.0.0	241.192.0.1	241.255.255.254	241.255.255.255	4,194,302

Split 240.0.0.0/7 into 16 equal /11 subnets (2,097,150 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	240.0.0.0/11	240.0.0.0	240.0.0.1	240.31.255.254	240.31.255.255	2,097,150
2	240.32.0.0/11	240.32.0.0	240.32.0.1	240.63.255.254	240.63.255.255	2,097,150
3	240.64.0.0/11	240.64.0.0	240.64.0.1	240.95.255.254	240.95.255.255	2,097,150
4	240.96.0.0/11	240.96.0.0	240.96.0.1	240.127.255.254	240.127.255.255	2,097,150
5	240.128.0.0/11	240.128.0.0	240.128.0.1	240.159.255.254	240.159.255.255	2,097,150
6	240.160.0.0/11	240.160.0.0	240.160.0.1	240.191.255.254	240.191.255.255	2,097,150
7	240.192.0.0/11	240.192.0.0	240.192.0.1	240.223.255.254	240.223.255.255	2,097,150
8	240.224.0.0/11	240.224.0.0	240.224.0.1	240.255.255.254	240.255.255.255	2,097,150
9	241.0.0.0/11	241.0.0.0	241.0.0.1	241.31.255.254	241.31.255.255	2,097,150
10	241.32.0.0/11	241.32.0.0	241.32.0.1	241.63.255.254	241.63.255.255	2,097,150
11	241.64.0.0/11	241.64.0.0	241.64.0.1	241.95.255.254	241.95.255.255	2,097,150
12	241.96.0.0/11	241.96.0.0	241.96.0.1	241.127.255.254	241.127.255.255	2,097,150
13	241.128.0.0/11	241.128.0.0	241.128.0.1	241.159.255.254	241.159.255.255	2,097,150
14	241.160.0.0/11	241.160.0.0	241.160.0.1	241.191.255.254	241.191.255.255	2,097,150
15	241.192.0.0/11	241.192.0.0	241.192.0.1	241.223.255.254	241.223.255.255	2,097,150
16	241.224.0.0/11	241.224.0.0	241.224.0.1	241.255.255.254	241.255.255.255	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 240.0.0.0/6 Sibling /7 block 242.0.0.0/7

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