127.192.0.0/11

Loopback RFC 5735

Class A — /11 prefix — 2,097,150 usable hosts

Network Address

127.192.0.0

Broadcast Address

127.223.255.255

Subnet Mask

255.224.0.0

Usable Hosts

2,097,150

First Usable IP

127.192.0.1

Last Usable IP

127.223.255.254

Total IPs

2,097,152

Prefix Length

/11

Network address — the base address of the block (127.192.0.0). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 127.223.255.255 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	127.192.0.0/11
Network Address	127.192.0.0
Broadcast Address	127.223.255.255
Subnet Mask	255.224.0.0
Wildcard Mask	0.31.255.255
Prefix Length	/11
IP Address Class	Class A
Total IP Addresses	2,097,152
Usable Host Addresses	2,097,150
First Usable IP	127.192.0.1
Last Usable IP	127.223.255.254
Network (Hex)	0x7FC00000
Broadcast (Hex)	0x7FDFFFFF
Governing RFC	RFC 5735
Address Type	Loopback

Binary Representation

Network Address

01111111 01111111.11000000.00000000.00000000

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 127.192.0.0/11 into 2 equal /12 subnets (1,048,574 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	127.192.0.0/12	127.192.0.0	127.192.0.1	127.207.255.254	127.207.255.255	1,048,574
2	127.208.0.0/12	127.208.0.0	127.208.0.1	127.223.255.254	127.223.255.255	1,048,574

Split 127.192.0.0/11 into 4 equal /13 subnets (524,286 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	127.192.0.0/13	127.192.0.0	127.192.0.1	127.199.255.254	127.199.255.255	524,286
2	127.200.0.0/13	127.200.0.0	127.200.0.1	127.207.255.254	127.207.255.255	524,286
3	127.208.0.0/13	127.208.0.0	127.208.0.1	127.215.255.254	127.215.255.255	524,286
4	127.216.0.0/13	127.216.0.0	127.216.0.1	127.223.255.254	127.223.255.255	524,286

Split 127.192.0.0/11 into 8 equal /14 subnets (262,142 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	127.192.0.0/14	127.192.0.0	127.192.0.1	127.195.255.254	127.195.255.255	262,142
2	127.196.0.0/14	127.196.0.0	127.196.0.1	127.199.255.254	127.199.255.255	262,142
3	127.200.0.0/14	127.200.0.0	127.200.0.1	127.203.255.254	127.203.255.255	262,142
4	127.204.0.0/14	127.204.0.0	127.204.0.1	127.207.255.254	127.207.255.255	262,142
5	127.208.0.0/14	127.208.0.0	127.208.0.1	127.211.255.254	127.211.255.255	262,142
6	127.212.0.0/14	127.212.0.0	127.212.0.1	127.215.255.254	127.215.255.255	262,142
7	127.216.0.0/14	127.216.0.0	127.216.0.1	127.219.255.254	127.219.255.255	262,142
8	127.220.0.0/14	127.220.0.0	127.220.0.1	127.223.255.254	127.223.255.255	262,142

Split 127.192.0.0/11 into 16 equal /15 subnets (131,070 usable hosts each).

#	CIDR	Network	First Usable	Last Usable	Broadcast	Hosts
1	127.192.0.0/15	127.192.0.0	127.192.0.1	127.193.255.254	127.193.255.255	131,070
2	127.194.0.0/15	127.194.0.0	127.194.0.1	127.195.255.254	127.195.255.255	131,070
3	127.196.0.0/15	127.196.0.0	127.196.0.1	127.197.255.254	127.197.255.255	131,070
4	127.198.0.0/15	127.198.0.0	127.198.0.1	127.199.255.254	127.199.255.255	131,070
5	127.200.0.0/15	127.200.0.0	127.200.0.1	127.201.255.254	127.201.255.255	131,070
6	127.202.0.0/15	127.202.0.0	127.202.0.1	127.203.255.254	127.203.255.255	131,070
7	127.204.0.0/15	127.204.0.0	127.204.0.1	127.205.255.254	127.205.255.255	131,070
8	127.206.0.0/15	127.206.0.0	127.206.0.1	127.207.255.254	127.207.255.255	131,070
9	127.208.0.0/15	127.208.0.0	127.208.0.1	127.209.255.254	127.209.255.255	131,070
10	127.210.0.0/15	127.210.0.0	127.210.0.1	127.211.255.254	127.211.255.255	131,070
11	127.212.0.0/15	127.212.0.0	127.212.0.1	127.213.255.254	127.213.255.255	131,070
12	127.214.0.0/15	127.214.0.0	127.214.0.1	127.215.255.254	127.215.255.255	131,070
13	127.216.0.0/15	127.216.0.0	127.216.0.1	127.217.255.254	127.217.255.255	131,070
14	127.218.0.0/15	127.218.0.0	127.218.0.1	127.219.255.254	127.219.255.255	131,070
15	127.220.0.0/15	127.220.0.0	127.220.0.1	127.221.255.254	127.221.255.255	131,070
16	127.222.0.0/15	127.222.0.0	127.222.0.1	127.223.255.254	127.223.255.255	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 127.192.0.0/10 Sibling /11 block 127.224.0.0/11

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