IPRangeExplorer

11.63.91.128/28

Public

Class A — /28 prefix — 14 usable hosts

Network Address
11.63.91.128
Broadcast Address
11.63.91.143
Subnet Mask
255.255.255.240
Usable Hosts
14
First Usable IP
11.63.91.129
Last Usable IP
11.63.91.142
Total IPs
16
Prefix Length
/28

Network address — the base address of the block (11.63.91.128). All devices in this subnet share this prefix. Cannot be assigned to a host.

Broadcast address — packets sent to 11.63.91.143 are delivered to every device in the subnet. Also reserved — not assignable.

Usable hosts — the 14 addresses between those two that you can assign to servers, VMs, or interfaces.

Subnet mask — 255.255.255.240 is the dotted-decimal equivalent of /28. Older tools and Cisco configs use this format instead of CIDR slash notation.

Full Details

CIDR Notation 11.63.91.128/28
Network Address 11.63.91.128
Broadcast Address 11.63.91.143
Subnet Mask 255.255.255.240
Wildcard Mask 0.0.0.15
Prefix Length /28
IP Address Class Class A
Total IP Addresses 16
Usable Host Addresses 14
First Usable IP 11.63.91.129
Last Usable IP 11.63.91.142
Network (Hex) 0x0B3F5B80
Broadcast (Hex) 0x0B3F5B8F
Address Type Public / Globally Routable

Binary Representation

Network Address
00001011.00111111.01011011 00001011.00111111.01011011.10000000
Subnet Mask
11111111.11111111.11111111.11110000

The first 28 bits (1s in the mask) identify the network. The remaining 4 bits identify hosts within the network.

Split into Equal Subnets

Split 11.63.91.128/28 into 2 equal /29 subnets (6 usable hosts each).

# CIDR Network First Usable Last Usable Broadcast Hosts
1 11.63.91.128/29 11.63.91.128 11.63.91.129 11.63.91.134 11.63.91.135 6
2 11.63.91.136/29 11.63.91.136 11.63.91.137 11.63.91.142 11.63.91.143 6

All 16 IP Addresses in this Range

11.63.91.128 net
11.63.91.129
11.63.91.130
11.63.91.131
11.63.91.132
11.63.91.133
11.63.91.134
11.63.91.135
11.63.91.136
11.63.91.137
11.63.91.138
11.63.91.139
11.63.91.140
11.63.91.141
11.63.91.142
11.63.91.143 bcast

/28 Subnet Reference

Total IPs 16
Usable Hosts 14
Subnet Mask 255.255.255.240
Wildcard 0.0.0.15
Full /28 reference →

Related Ranges

Parent /27 block 11.63.91.128/27 Sibling /28 block 11.63.91.144/28

Adjacent Prefix Sizes

/26 62 hosts /27 30 hosts /28 14 hosts /29 6 hosts /30 2 hosts

Calculate Another