230.128.0.0/11

Multicast RFC 5771

Class D (Multicast) — /11 prefix — 2,097,150 usable hosts

Network Address

230.128.0.0

Broadcast Address

230.159.255.255

Subnet Mask

255.224.0.0

Usable Hosts

2,097,150

First Usable IP

230.128.0.1

Last Usable IP

230.159.255.254

Total IPs

2,097,152

Prefix Length

/11

Network address — the base address of the block (230.128.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 230.159.255.255 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 2,097,150 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.224.0.0 is the dotted-decimal equivalent of /11. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation	230.128.0.0/11
Network Address	230.128.0.0
Broadcast Address	230.159.255.255
Subnet Mask	255.224.0.0
Wildcard Mask	0.31.255.255
Prefix Length	/11
IP Address Class	Class D (Multicast)
Total IP Addresses	2,097,152
Usable Host Addresses	2,097,150
First Usable IP	230.128.0.1
Last Usable IP	230.159.255.254
Network (Hex)	0xE6800000
Broadcast (Hex)	0xE69FFFFF
Governing RFC	RFC 5771
Address Type	Multicast

Binary Representation

Network Address

11100110 11100110.10000000.00000000.00000000

Subnet Mask

11111111.11100000.00000000.00000000

The first 11 bits (1s in the mask) identify the network. The remaining 21 bits identify hosts within the network.

Split into Equal Subnets

Split 230.128.0.0/11 into 2 equal /12 subnets (1,048,574 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	230.128.0.0/12	230.128.0.0	230.128.0.1	230.143.255.254	230.143.255.255	1,048,574
2	230.144.0.0/12	230.144.0.0	230.144.0.1	230.159.255.254	230.159.255.255	1,048,574

Split 230.128.0.0/11 into 4 equal /13 subnets (524,286 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	230.128.0.0/13	230.128.0.0	230.128.0.1	230.135.255.254	230.135.255.255	524,286
2	230.136.0.0/13	230.136.0.0	230.136.0.1	230.143.255.254	230.143.255.255	524,286
3	230.144.0.0/13	230.144.0.0	230.144.0.1	230.151.255.254	230.151.255.255	524,286
4	230.152.0.0/13	230.152.0.0	230.152.0.1	230.159.255.254	230.159.255.255	524,286

Split 230.128.0.0/11 into 8 equal /14 subnets (262,142 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	230.128.0.0/14	230.128.0.0	230.128.0.1	230.131.255.254	230.131.255.255	262,142
2	230.132.0.0/14	230.132.0.0	230.132.0.1	230.135.255.254	230.135.255.255	262,142
3	230.136.0.0/14	230.136.0.0	230.136.0.1	230.139.255.254	230.139.255.255	262,142
4	230.140.0.0/14	230.140.0.0	230.140.0.1	230.143.255.254	230.143.255.255	262,142
5	230.144.0.0/14	230.144.0.0	230.144.0.1	230.147.255.254	230.147.255.255	262,142
6	230.148.0.0/14	230.148.0.0	230.148.0.1	230.151.255.254	230.151.255.255	262,142
7	230.152.0.0/14	230.152.0.0	230.152.0.1	230.155.255.254	230.155.255.255	262,142
8	230.156.0.0/14	230.156.0.0	230.156.0.1	230.159.255.254	230.159.255.255	262,142

Split 230.128.0.0/11 into 16 equal /15 subnets (131,070 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	230.128.0.0/15	230.128.0.0	230.128.0.1	230.129.255.254	230.129.255.255	131,070
2	230.130.0.0/15	230.130.0.0	230.130.0.1	230.131.255.254	230.131.255.255	131,070
3	230.132.0.0/15	230.132.0.0	230.132.0.1	230.133.255.254	230.133.255.255	131,070
4	230.134.0.0/15	230.134.0.0	230.134.0.1	230.135.255.254	230.135.255.255	131,070
5	230.136.0.0/15	230.136.0.0	230.136.0.1	230.137.255.254	230.137.255.255	131,070
6	230.138.0.0/15	230.138.0.0	230.138.0.1	230.139.255.254	230.139.255.255	131,070
7	230.140.0.0/15	230.140.0.0	230.140.0.1	230.141.255.254	230.141.255.255	131,070
8	230.142.0.0/15	230.142.0.0	230.142.0.1	230.143.255.254	230.143.255.255	131,070
9	230.144.0.0/15	230.144.0.0	230.144.0.1	230.145.255.254	230.145.255.255	131,070
10	230.146.0.0/15	230.146.0.0	230.146.0.1	230.147.255.254	230.147.255.255	131,070
11	230.148.0.0/15	230.148.0.0	230.148.0.1	230.149.255.254	230.149.255.255	131,070
12	230.150.0.0/15	230.150.0.0	230.150.0.1	230.151.255.254	230.151.255.255	131,070
13	230.152.0.0/15	230.152.0.0	230.152.0.1	230.153.255.254	230.153.255.255	131,070
14	230.154.0.0/15	230.154.0.0	230.154.0.1	230.155.255.254	230.155.255.255	131,070
15	230.156.0.0/15	230.156.0.0	230.156.0.1	230.157.255.254	230.157.255.255	131,070
16	230.158.0.0/15	230.158.0.0	230.158.0.1	230.159.255.254	230.159.255.255	131,070

/11 Subnet Reference

Total IPs 2,097,152

Usable Hosts 2,097,150

Subnet Mask 255.224.0.0

Wildcard 0.31.255.255

Full /11 reference →

Related Ranges

Parent /10 block 230.128.0.0/10 Sibling /11 block 230.160.0.0/11

Adjacent Prefix Sizes

/9 8,388,606 hosts /10 4,194,302 hosts /11 2,097,150 hosts /12 1,048,574 hosts /13 524,286 hosts