Find IP IPv4 Network/Subnet and its host address ranges

What is an IPv4 IP address its network and host address ranges?

An IPv4 IP address is an address used in order to uniquely identify a device on an IP network. The address is made up of 32 binary bits, which can be divisible into a network portion and host portion with the help of a subnet mask. The 32 binary bits are broken into four octets (1 octet = 8 bits). Each octet is converted to decimal and separated by a period (dot).

How to Subnet IPv4? Its simple answer is that subnetting is the process of taking a network and splitting it into smaller networks, known as subnets. It's used to free up more public IPv4 addresses and segment networks for security and easier management.
Following are the ranges of IPv4 subnet/network address and their host addresses.

IPv4 AddressIPv6 Address
255.66.31.1 0:0:0:0:0:ffff:ff42:1f01
255.66.31.2 0:0:0:0:0:ffff:ff42:1f02
255.66.31.3 0:0:0:0:0:ffff:ff42:1f03
255.66.31.4 0:0:0:0:0:ffff:ff42:1f04
255.66.31.5 0:0:0:0:0:ffff:ff42:1f05
255.66.31.6 0:0:0:0:0:ffff:ff42:1f06
255.66.31.7 0:0:0:0:0:ffff:ff42:1f07
255.66.31.8 0:0:0:0:0:ffff:ff42:1f08
255.66.31.9 0:0:0:0:0:ffff:ff42:1f09
255.66.31.10 0:0:0:0:0:ffff:ff42:1f0a
255.66.31.11 0:0:0:0:0:ffff:ff42:1f0b
255.66.31.12 0:0:0:0:0:ffff:ff42:1f0c
255.66.31.13 0:0:0:0:0:ffff:ff42:1f0d
255.66.31.14 0:0:0:0:0:ffff:ff42:1f0e
255.66.31.15 0:0:0:0:0:ffff:ff42:1f0f
255.66.31.16 0:0:0:0:0:ffff:ff42:1f10
255.66.31.17 0:0:0:0:0:ffff:ff42:1f11
255.66.31.18 0:0:0:0:0:ffff:ff42:1f12
255.66.31.19 0:0:0:0:0:ffff:ff42:1f13
255.66.31.20 0:0:0:0:0:ffff:ff42:1f14
255.66.31.21 0:0:0:0:0:ffff:ff42:1f15
255.66.31.22 0:0:0:0:0:ffff:ff42:1f16
255.66.31.23 0:0:0:0:0:ffff:ff42:1f17
255.66.31.24 0:0:0:0:0:ffff:ff42:1f18
255.66.31.25 0:0:0:0:0:ffff:ff42:1f19
255.66.31.26 0:0:0:0:0:ffff:ff42:1f1a
255.66.31.27 0:0:0:0:0:ffff:ff42:1f1b
255.66.31.28 0:0:0:0:0:ffff:ff42:1f1c
255.66.31.29 0:0:0:0:0:ffff:ff42:1f1d
255.66.31.30 0:0:0:0:0:ffff:ff42:1f1e
255.66.31.31 0:0:0:0:0:ffff:ff42:1f1f
255.66.31.32 0:0:0:0:0:ffff:ff42:1f20
255.66.31.33 0:0:0:0:0:ffff:ff42:1f21
255.66.31.34 0:0:0:0:0:ffff:ff42:1f22
255.66.31.35 0:0:0:0:0:ffff:ff42:1f23
255.66.31.36 0:0:0:0:0:ffff:ff42:1f24
255.66.31.37 0:0:0:0:0:ffff:ff42:1f25
255.66.31.38 0:0:0:0:0:ffff:ff42:1f26
255.66.31.39 0:0:0:0:0:ffff:ff42:1f27
255.66.31.40 0:0:0:0:0:ffff:ff42:1f28
255.66.31.41 0:0:0:0:0:ffff:ff42:1f29
255.66.31.42 0:0:0:0:0:ffff:ff42:1f2a
255.66.31.43 0:0:0:0:0:ffff:ff42:1f2b
255.66.31.44 0:0:0:0:0:ffff:ff42:1f2c
255.66.31.45 0:0:0:0:0:ffff:ff42:1f2d
255.66.31.46 0:0:0:0:0:ffff:ff42:1f2e
255.66.31.47 0:0:0:0:0:ffff:ff42:1f2f
255.66.31.48 0:0:0:0:0:ffff:ff42:1f30
255.66.31.49 0:0:0:0:0:ffff:ff42:1f31
255.66.31.50 0:0:0:0:0:ffff:ff42:1f32
255.66.31.51 0:0:0:0:0:ffff:ff42:1f33
255.66.31.52 0:0:0:0:0:ffff:ff42:1f34
255.66.31.53 0:0:0:0:0:ffff:ff42:1f35
255.66.31.54 0:0:0:0:0:ffff:ff42:1f36
255.66.31.55 0:0:0:0:0:ffff:ff42:1f37
255.66.31.56 0:0:0:0:0:ffff:ff42:1f38
255.66.31.57 0:0:0:0:0:ffff:ff42:1f39
255.66.31.58 0:0:0:0:0:ffff:ff42:1f3a
255.66.31.59 0:0:0:0:0:ffff:ff42:1f3b
255.66.31.60 0:0:0:0:0:ffff:ff42:1f3c


255.66.31.61 0:0:0:0:0:ffff:ff42:1f3d
255.66.31.62 0:0:0:0:0:ffff:ff42:1f3e
255.66.31.63 0:0:0:0:0:ffff:ff42:1f3f
255.66.31.64 0:0:0:0:0:ffff:ff42:1f40
255.66.31.65 0:0:0:0:0:ffff:ff42:1f41
255.66.31.66 0:0:0:0:0:ffff:ff42:1f42
255.66.31.67 0:0:0:0:0:ffff:ff42:1f43
255.66.31.68 0:0:0:0:0:ffff:ff42:1f44
255.66.31.69 0:0:0:0:0:ffff:ff42:1f45
255.66.31.70 0:0:0:0:0:ffff:ff42:1f46
255.66.31.71 0:0:0:0:0:ffff:ff42:1f47
255.66.31.72 0:0:0:0:0:ffff:ff42:1f48
255.66.31.73 0:0:0:0:0:ffff:ff42:1f49
255.66.31.74 0:0:0:0:0:ffff:ff42:1f4a
255.66.31.75 0:0:0:0:0:ffff:ff42:1f4b
255.66.31.76 0:0:0:0:0:ffff:ff42:1f4c
255.66.31.77 0:0:0:0:0:ffff:ff42:1f4d
255.66.31.78 0:0:0:0:0:ffff:ff42:1f4e
255.66.31.79 0:0:0:0:0:ffff:ff42:1f4f
255.66.31.80 0:0:0:0:0:ffff:ff42:1f50
255.66.31.81 0:0:0:0:0:ffff:ff42:1f51
255.66.31.82 0:0:0:0:0:ffff:ff42:1f52
255.66.31.83 0:0:0:0:0:ffff:ff42:1f53
255.66.31.84 0:0:0:0:0:ffff:ff42:1f54
255.66.31.85 0:0:0:0:0:ffff:ff42:1f55
255.66.31.86 0:0:0:0:0:ffff:ff42:1f56
255.66.31.87 0:0:0:0:0:ffff:ff42:1f57
255.66.31.88 0:0:0:0:0:ffff:ff42:1f58
255.66.31.89 0:0:0:0:0:ffff:ff42:1f59
255.66.31.90 0:0:0:0:0:ffff:ff42:1f5a
255.66.31.91 0:0:0:0:0:ffff:ff42:1f5b
255.66.31.92 0:0:0:0:0:ffff:ff42:1f5c
255.66.31.93 0:0:0:0:0:ffff:ff42:1f5d
255.66.31.94 0:0:0:0:0:ffff:ff42:1f5e
255.66.31.95 0:0:0:0:0:ffff:ff42:1f5f
255.66.31.96 0:0:0:0:0:ffff:ff42:1f60
255.66.31.97 0:0:0:0:0:ffff:ff42:1f61
255.66.31.98 0:0:0:0:0:ffff:ff42:1f62
255.66.31.99 0:0:0:0:0:ffff:ff42:1f63
255.66.31.100 0:0:0:0:0:ffff:ff42:1f64
255.66.31.101 0:0:0:0:0:ffff:ff42:1f65
255.66.31.102 0:0:0:0:0:ffff:ff42:1f66
255.66.31.103 0:0:0:0:0:ffff:ff42:1f67
255.66.31.104 0:0:0:0:0:ffff:ff42:1f68
255.66.31.105 0:0:0:0:0:ffff:ff42:1f69
255.66.31.106 0:0:0:0:0:ffff:ff42:1f6a
255.66.31.107 0:0:0:0:0:ffff:ff42:1f6b
255.66.31.108 0:0:0:0:0:ffff:ff42:1f6c
255.66.31.109 0:0:0:0:0:ffff:ff42:1f6d
255.66.31.110 0:0:0:0:0:ffff:ff42:1f6e
255.66.31.111 0:0:0:0:0:ffff:ff42:1f6f
255.66.31.112 0:0:0:0:0:ffff:ff42:1f70
255.66.31.113 0:0:0:0:0:ffff:ff42:1f71
255.66.31.114 0:0:0:0:0:ffff:ff42:1f72
255.66.31.115 0:0:0:0:0:ffff:ff42:1f73
255.66.31.116 0:0:0:0:0:ffff:ff42:1f74
255.66.31.117 0:0:0:0:0:ffff:ff42:1f75
255.66.31.118 0:0:0:0:0:ffff:ff42:1f76
255.66.31.119 0:0:0:0:0:ffff:ff42:1f77
255.66.31.120 0:0:0:0:0:ffff:ff42:1f78


255.66.31.121 0:0:0:0:0:ffff:ff42:1f79
255.66.31.122 0:0:0:0:0:ffff:ff42:1f7a
255.66.31.123 0:0:0:0:0:ffff:ff42:1f7b
255.66.31.124 0:0:0:0:0:ffff:ff42:1f7c
255.66.31.125 0:0:0:0:0:ffff:ff42:1f7d
255.66.31.126 0:0:0:0:0:ffff:ff42:1f7e
255.66.31.127 0:0:0:0:0:ffff:ff42:1f7f
255.66.31.128 0:0:0:0:0:ffff:ff42:1f80
255.66.31.129 0:0:0:0:0:ffff:ff42:1f81
255.66.31.130 0:0:0:0:0:ffff:ff42:1f82
255.66.31.131 0:0:0:0:0:ffff:ff42:1f83
255.66.31.132 0:0:0:0:0:ffff:ff42:1f84
255.66.31.133 0:0:0:0:0:ffff:ff42:1f85
255.66.31.134 0:0:0:0:0:ffff:ff42:1f86
255.66.31.135 0:0:0:0:0:ffff:ff42:1f87
255.66.31.136 0:0:0:0:0:ffff:ff42:1f88
255.66.31.137 0:0:0:0:0:ffff:ff42:1f89
255.66.31.138 0:0:0:0:0:ffff:ff42:1f8a
255.66.31.139 0:0:0:0:0:ffff:ff42:1f8b
255.66.31.140 0:0:0:0:0:ffff:ff42:1f8c
255.66.31.141 0:0:0:0:0:ffff:ff42:1f8d
255.66.31.142 0:0:0:0:0:ffff:ff42:1f8e
255.66.31.143 0:0:0:0:0:ffff:ff42:1f8f
255.66.31.144 0:0:0:0:0:ffff:ff42:1f90
255.66.31.145 0:0:0:0:0:ffff:ff42:1f91
255.66.31.146 0:0:0:0:0:ffff:ff42:1f92
255.66.31.147 0:0:0:0:0:ffff:ff42:1f93
255.66.31.148 0:0:0:0:0:ffff:ff42:1f94
255.66.31.149 0:0:0:0:0:ffff:ff42:1f95
255.66.31.150 0:0:0:0:0:ffff:ff42:1f96
255.66.31.151 0:0:0:0:0:ffff:ff42:1f97
255.66.31.152 0:0:0:0:0:ffff:ff42:1f98
255.66.31.153 0:0:0:0:0:ffff:ff42:1f99
255.66.31.154 0:0:0:0:0:ffff:ff42:1f9a
255.66.31.155 0:0:0:0:0:ffff:ff42:1f9b
255.66.31.156 0:0:0:0:0:ffff:ff42:1f9c
255.66.31.157 0:0:0:0:0:ffff:ff42:1f9d
255.66.31.158 0:0:0:0:0:ffff:ff42:1f9e
255.66.31.159 0:0:0:0:0:ffff:ff42:1f9f
255.66.31.160 0:0:0:0:0:ffff:ff42:1fa0
255.66.31.161 0:0:0:0:0:ffff:ff42:1fa1
255.66.31.162 0:0:0:0:0:ffff:ff42:1fa2
255.66.31.163 0:0:0:0:0:ffff:ff42:1fa3
255.66.31.164 0:0:0:0:0:ffff:ff42:1fa4
255.66.31.165 0:0:0:0:0:ffff:ff42:1fa5
255.66.31.166 0:0:0:0:0:ffff:ff42:1fa6
255.66.31.167 0:0:0:0:0:ffff:ff42:1fa7
255.66.31.168 0:0:0:0:0:ffff:ff42:1fa8
255.66.31.169 0:0:0:0:0:ffff:ff42:1fa9
255.66.31.170 0:0:0:0:0:ffff:ff42:1faa
255.66.31.171 0:0:0:0:0:ffff:ff42:1fab
255.66.31.172 0:0:0:0:0:ffff:ff42:1fac
255.66.31.173 0:0:0:0:0:ffff:ff42:1fad
255.66.31.174 0:0:0:0:0:ffff:ff42:1fae
255.66.31.175 0:0:0:0:0:ffff:ff42:1faf
255.66.31.176 0:0:0:0:0:ffff:ff42:1fb0
255.66.31.177 0:0:0:0:0:ffff:ff42:1fb1
255.66.31.178 0:0:0:0:0:ffff:ff42:1fb2
255.66.31.179 0:0:0:0:0:ffff:ff42:1fb3
255.66.31.180 0:0:0:0:0:ffff:ff42:1fb4


255.66.31.181 0:0:0:0:0:ffff:ff42:1fb5
255.66.31.182 0:0:0:0:0:ffff:ff42:1fb6
255.66.31.183 0:0:0:0:0:ffff:ff42:1fb7
255.66.31.184 0:0:0:0:0:ffff:ff42:1fb8
255.66.31.185 0:0:0:0:0:ffff:ff42:1fb9
255.66.31.186 0:0:0:0:0:ffff:ff42:1fba
255.66.31.187 0:0:0:0:0:ffff:ff42:1fbb
255.66.31.188 0:0:0:0:0:ffff:ff42:1fbc
255.66.31.189 0:0:0:0:0:ffff:ff42:1fbd
255.66.31.190 0:0:0:0:0:ffff:ff42:1fbe
255.66.31.191 0:0:0:0:0:ffff:ff42:1fbf
255.66.31.192 0:0:0:0:0:ffff:ff42:1fc0
255.66.31.193 0:0:0:0:0:ffff:ff42:1fc1
255.66.31.194 0:0:0:0:0:ffff:ff42:1fc2
255.66.31.195 0:0:0:0:0:ffff:ff42:1fc3
255.66.31.196 0:0:0:0:0:ffff:ff42:1fc4
255.66.31.197 0:0:0:0:0:ffff:ff42:1fc5
255.66.31.198 0:0:0:0:0:ffff:ff42:1fc6
255.66.31.199 0:0:0:0:0:ffff:ff42:1fc7
255.66.31.200 0:0:0:0:0:ffff:ff42:1fc8
255.66.31.201 0:0:0:0:0:ffff:ff42:1fc9
255.66.31.202 0:0:0:0:0:ffff:ff42:1fca
255.66.31.203 0:0:0:0:0:ffff:ff42:1fcb
255.66.31.204 0:0:0:0:0:ffff:ff42:1fcc
255.66.31.205 0:0:0:0:0:ffff:ff42:1fcd
255.66.31.206 0:0:0:0:0:ffff:ff42:1fce
255.66.31.207 0:0:0:0:0:ffff:ff42:1fcf
255.66.31.208 0:0:0:0:0:ffff:ff42:1fd0
255.66.31.209 0:0:0:0:0:ffff:ff42:1fd1
255.66.31.210 0:0:0:0:0:ffff:ff42:1fd2
255.66.31.211 0:0:0:0:0:ffff:ff42:1fd3
255.66.31.212 0:0:0:0:0:ffff:ff42:1fd4
255.66.31.213 0:0:0:0:0:ffff:ff42:1fd5
255.66.31.214 0:0:0:0:0:ffff:ff42:1fd6
255.66.31.215 0:0:0:0:0:ffff:ff42:1fd7
255.66.31.216 0:0:0:0:0:ffff:ff42:1fd8
255.66.31.217 0:0:0:0:0:ffff:ff42:1fd9
255.66.31.218 0:0:0:0:0:ffff:ff42:1fda
255.66.31.219 0:0:0:0:0:ffff:ff42:1fdb
255.66.31.220 0:0:0:0:0:ffff:ff42:1fdc
255.66.31.221 0:0:0:0:0:ffff:ff42:1fdd
255.66.31.222 0:0:0:0:0:ffff:ff42:1fde
255.66.31.223 0:0:0:0:0:ffff:ff42:1fdf
255.66.31.224 0:0:0:0:0:ffff:ff42:1fe0
255.66.31.225 0:0:0:0:0:ffff:ff42:1fe1
255.66.31.226 0:0:0:0:0:ffff:ff42:1fe2
255.66.31.227 0:0:0:0:0:ffff:ff42:1fe3
255.66.31.228 0:0:0:0:0:ffff:ff42:1fe4
255.66.31.229 0:0:0:0:0:ffff:ff42:1fe5
255.66.31.230 0:0:0:0:0:ffff:ff42:1fe6
255.66.31.231 0:0:0:0:0:ffff:ff42:1fe7
255.66.31.232 0:0:0:0:0:ffff:ff42:1fe8
255.66.31.233 0:0:0:0:0:ffff:ff42:1fe9
255.66.31.234 0:0:0:0:0:ffff:ff42:1fea
255.66.31.235 0:0:0:0:0:ffff:ff42:1feb
255.66.31.236 0:0:0:0:0:ffff:ff42:1fec
255.66.31.237 0:0:0:0:0:ffff:ff42:1fed
255.66.31.238 0:0:0:0:0:ffff:ff42:1fee
255.66.31.239 0:0:0:0:0:ffff:ff42:1fef
255.66.31.240 0:0:0:0:0:ffff:ff42:1ff0
255.66.31.241 0:0:0:0:0:ffff:ff42:1ff1
255.66.31.242 0:0:0:0:0:ffff:ff42:1ff2
255.66.31.243 0:0:0:0:0:ffff:ff42:1ff3
255.66.31.244 0:0:0:0:0:ffff:ff42:1ff4
255.66.31.245 0:0:0:0:0:ffff:ff42:1ff5
255.66.31.246 0:0:0:0:0:ffff:ff42:1ff6
255.66.31.247 0:0:0:0:0:ffff:ff42:1ff7
255.66.31.248 0:0:0:0:0:ffff:ff42:1ff8
255.66.31.249 0:0:0:0:0:ffff:ff42:1ff9
255.66.31.250 0:0:0:0:0:ffff:ff42:1ffa
255.66.31.251 0:0:0:0:0:ffff:ff42:1ffb
255.66.31.252 0:0:0:0:0:ffff:ff42:1ffc
255.66.31.253 0:0:0:0:0:ffff:ff42:1ffd
255.66.31.254 0:0:0:0:0:ffff:ff42:1ffe
255.66.31.255 0:0:0:0:0:ffff:ff42:1fff


How we got IPv4 subnet masks?

An IPv4 subnet mask consists of 32 bits; it is a sequence of ones (1) followed by a block of zeros (0). The ones indicate bits in the address used for the network prefix and the trailing block of zeros designates that part as being the host identifier.