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
255.66.111.1 0:0:0:0:0:ffff:ff42:6f01
255.66.111.2 0:0:0:0:0:ffff:ff42:6f02
255.66.111.3 0:0:0:0:0:ffff:ff42:6f03
255.66.111.4 0:0:0:0:0:ffff:ff42:6f04
255.66.111.5 0:0:0:0:0:ffff:ff42:6f05
255.66.111.6 0:0:0:0:0:ffff:ff42:6f06
255.66.111.7 0:0:0:0:0:ffff:ff42:6f07
255.66.111.8 0:0:0:0:0:ffff:ff42:6f08
255.66.111.9 0:0:0:0:0:ffff:ff42:6f09
255.66.111.10 0:0:0:0:0:ffff:ff42:6f0a
255.66.111.11 0:0:0:0:0:ffff:ff42:6f0b
255.66.111.12 0:0:0:0:0:ffff:ff42:6f0c
255.66.111.13 0:0:0:0:0:ffff:ff42:6f0d
255.66.111.14 0:0:0:0:0:ffff:ff42:6f0e
255.66.111.15 0:0:0:0:0:ffff:ff42:6f0f
255.66.111.16 0:0:0:0:0:ffff:ff42:6f10
255.66.111.17 0:0:0:0:0:ffff:ff42:6f11
255.66.111.18 0:0:0:0:0:ffff:ff42:6f12
255.66.111.19 0:0:0:0:0:ffff:ff42:6f13
255.66.111.20 0:0:0:0:0:ffff:ff42:6f14
255.66.111.21 0:0:0:0:0:ffff:ff42:6f15
255.66.111.22 0:0:0:0:0:ffff:ff42:6f16
255.66.111.23 0:0:0:0:0:ffff:ff42:6f17
255.66.111.24 0:0:0:0:0:ffff:ff42:6f18
255.66.111.25 0:0:0:0:0:ffff:ff42:6f19
255.66.111.26 0:0:0:0:0:ffff:ff42:6f1a
255.66.111.27 0:0:0:0:0:ffff:ff42:6f1b
255.66.111.28 0:0:0:0:0:ffff:ff42:6f1c
255.66.111.29 0:0:0:0:0:ffff:ff42:6f1d
255.66.111.30 0:0:0:0:0:ffff:ff42:6f1e
255.66.111.31 0:0:0:0:0:ffff:ff42:6f1f
255.66.111.32 0:0:0:0:0:ffff:ff42:6f20
255.66.111.33 0:0:0:0:0:ffff:ff42:6f21
255.66.111.34 0:0:0:0:0:ffff:ff42:6f22
255.66.111.35 0:0:0:0:0:ffff:ff42:6f23
255.66.111.36 0:0:0:0:0:ffff:ff42:6f24
255.66.111.37 0:0:0:0:0:ffff:ff42:6f25
255.66.111.38 0:0:0:0:0:ffff:ff42:6f26
255.66.111.39 0:0:0:0:0:ffff:ff42:6f27
255.66.111.40 0:0:0:0:0:ffff:ff42:6f28
255.66.111.41 0:0:0:0:0:ffff:ff42:6f29
255.66.111.42 0:0:0:0:0:ffff:ff42:6f2a
255.66.111.43 0:0:0:0:0:ffff:ff42:6f2b
255.66.111.44 0:0:0:0:0:ffff:ff42:6f2c
255.66.111.45 0:0:0:0:0:ffff:ff42:6f2d
255.66.111.46 0:0:0:0:0:ffff:ff42:6f2e
255.66.111.47 0:0:0:0:0:ffff:ff42:6f2f
255.66.111.48 0:0:0:0:0:ffff:ff42:6f30
255.66.111.49 0:0:0:0:0:ffff:ff42:6f31
255.66.111.50 0:0:0:0:0:ffff:ff42:6f32
255.66.111.51 0:0:0:0:0:ffff:ff42:6f33
255.66.111.52 0:0:0:0:0:ffff:ff42:6f34
255.66.111.53 0:0:0:0:0:ffff:ff42:6f35
255.66.111.54 0:0:0:0:0:ffff:ff42:6f36
255.66.111.55 0:0:0:0:0:ffff:ff42:6f37
255.66.111.56 0:0:0:0:0:ffff:ff42:6f38
255.66.111.57 0:0:0:0:0:ffff:ff42:6f39
255.66.111.58 0:0:0:0:0:ffff:ff42:6f3a
255.66.111.59 0:0:0:0:0:ffff:ff42:6f3b
255.66.111.60 0:0:0:0:0:ffff:ff42:6f3c


255.66.111.61 0:0:0:0:0:ffff:ff42:6f3d
255.66.111.62 0:0:0:0:0:ffff:ff42:6f3e
255.66.111.63 0:0:0:0:0:ffff:ff42:6f3f
255.66.111.64 0:0:0:0:0:ffff:ff42:6f40
255.66.111.65 0:0:0:0:0:ffff:ff42:6f41
255.66.111.66 0:0:0:0:0:ffff:ff42:6f42
255.66.111.67 0:0:0:0:0:ffff:ff42:6f43
255.66.111.68 0:0:0:0:0:ffff:ff42:6f44
255.66.111.69 0:0:0:0:0:ffff:ff42:6f45
255.66.111.70 0:0:0:0:0:ffff:ff42:6f46
255.66.111.71 0:0:0:0:0:ffff:ff42:6f47
255.66.111.72 0:0:0:0:0:ffff:ff42:6f48
255.66.111.73 0:0:0:0:0:ffff:ff42:6f49
255.66.111.74 0:0:0:0:0:ffff:ff42:6f4a
255.66.111.75 0:0:0:0:0:ffff:ff42:6f4b
255.66.111.76 0:0:0:0:0:ffff:ff42:6f4c
255.66.111.77 0:0:0:0:0:ffff:ff42:6f4d
255.66.111.78 0:0:0:0:0:ffff:ff42:6f4e
255.66.111.79 0:0:0:0:0:ffff:ff42:6f4f
255.66.111.80 0:0:0:0:0:ffff:ff42:6f50
255.66.111.81 0:0:0:0:0:ffff:ff42:6f51
255.66.111.82 0:0:0:0:0:ffff:ff42:6f52
255.66.111.83 0:0:0:0:0:ffff:ff42:6f53
255.66.111.84 0:0:0:0:0:ffff:ff42:6f54
255.66.111.85 0:0:0:0:0:ffff:ff42:6f55
255.66.111.86 0:0:0:0:0:ffff:ff42:6f56
255.66.111.87 0:0:0:0:0:ffff:ff42:6f57
255.66.111.88 0:0:0:0:0:ffff:ff42:6f58
255.66.111.89 0:0:0:0:0:ffff:ff42:6f59
255.66.111.90 0:0:0:0:0:ffff:ff42:6f5a
255.66.111.91 0:0:0:0:0:ffff:ff42:6f5b
255.66.111.92 0:0:0:0:0:ffff:ff42:6f5c
255.66.111.93 0:0:0:0:0:ffff:ff42:6f5d
255.66.111.94 0:0:0:0:0:ffff:ff42:6f5e
255.66.111.95 0:0:0:0:0:ffff:ff42:6f5f
255.66.111.96 0:0:0:0:0:ffff:ff42:6f60
255.66.111.97 0:0:0:0:0:ffff:ff42:6f61
255.66.111.98 0:0:0:0:0:ffff:ff42:6f62
255.66.111.99 0:0:0:0:0:ffff:ff42:6f63
255.66.111.100 0:0:0:0:0:ffff:ff42:6f64
255.66.111.101 0:0:0:0:0:ffff:ff42:6f65
255.66.111.102 0:0:0:0:0:ffff:ff42:6f66
255.66.111.103 0:0:0:0:0:ffff:ff42:6f67
255.66.111.104 0:0:0:0:0:ffff:ff42:6f68
255.66.111.105 0:0:0:0:0:ffff:ff42:6f69
255.66.111.106 0:0:0:0:0:ffff:ff42:6f6a
255.66.111.107 0:0:0:0:0:ffff:ff42:6f6b
255.66.111.108 0:0:0:0:0:ffff:ff42:6f6c
255.66.111.109 0:0:0:0:0:ffff:ff42:6f6d
255.66.111.110 0:0:0:0:0:ffff:ff42:6f6e
255.66.111.111 0:0:0:0:0:ffff:ff42:6f6f
255.66.111.112 0:0:0:0:0:ffff:ff42:6f70
255.66.111.113 0:0:0:0:0:ffff:ff42:6f71
255.66.111.114 0:0:0:0:0:ffff:ff42:6f72
255.66.111.115 0:0:0:0:0:ffff:ff42:6f73
255.66.111.116 0:0:0:0:0:ffff:ff42:6f74
255.66.111.117 0:0:0:0:0:ffff:ff42:6f75
255.66.111.118 0:0:0:0:0:ffff:ff42:6f76
255.66.111.119 0:0:0:0:0:ffff:ff42:6f77
255.66.111.120 0:0:0:0:0:ffff:ff42:6f78


255.66.111.121 0:0:0:0:0:ffff:ff42:6f79
255.66.111.122 0:0:0:0:0:ffff:ff42:6f7a
255.66.111.123 0:0:0:0:0:ffff:ff42:6f7b
255.66.111.124 0:0:0:0:0:ffff:ff42:6f7c
255.66.111.125 0:0:0:0:0:ffff:ff42:6f7d
255.66.111.126 0:0:0:0:0:ffff:ff42:6f7e
255.66.111.127 0:0:0:0:0:ffff:ff42:6f7f
255.66.111.128 0:0:0:0:0:ffff:ff42:6f80
255.66.111.129 0:0:0:0:0:ffff:ff42:6f81
255.66.111.130 0:0:0:0:0:ffff:ff42:6f82
255.66.111.131 0:0:0:0:0:ffff:ff42:6f83
255.66.111.132 0:0:0:0:0:ffff:ff42:6f84
255.66.111.133 0:0:0:0:0:ffff:ff42:6f85
255.66.111.134 0:0:0:0:0:ffff:ff42:6f86
255.66.111.135 0:0:0:0:0:ffff:ff42:6f87
255.66.111.136 0:0:0:0:0:ffff:ff42:6f88
255.66.111.137 0:0:0:0:0:ffff:ff42:6f89
255.66.111.138 0:0:0:0:0:ffff:ff42:6f8a
255.66.111.139 0:0:0:0:0:ffff:ff42:6f8b
255.66.111.140 0:0:0:0:0:ffff:ff42:6f8c
255.66.111.141 0:0:0:0:0:ffff:ff42:6f8d
255.66.111.142 0:0:0:0:0:ffff:ff42:6f8e
255.66.111.143 0:0:0:0:0:ffff:ff42:6f8f
255.66.111.144 0:0:0:0:0:ffff:ff42:6f90
255.66.111.145 0:0:0:0:0:ffff:ff42:6f91
255.66.111.146 0:0:0:0:0:ffff:ff42:6f92
255.66.111.147 0:0:0:0:0:ffff:ff42:6f93
255.66.111.148 0:0:0:0:0:ffff:ff42:6f94
255.66.111.149 0:0:0:0:0:ffff:ff42:6f95
255.66.111.150 0:0:0:0:0:ffff:ff42:6f96
255.66.111.151 0:0:0:0:0:ffff:ff42:6f97
255.66.111.152 0:0:0:0:0:ffff:ff42:6f98
255.66.111.153 0:0:0:0:0:ffff:ff42:6f99
255.66.111.154 0:0:0:0:0:ffff:ff42:6f9a
255.66.111.155 0:0:0:0:0:ffff:ff42:6f9b
255.66.111.156 0:0:0:0:0:ffff:ff42:6f9c
255.66.111.157 0:0:0:0:0:ffff:ff42:6f9d
255.66.111.158 0:0:0:0:0:ffff:ff42:6f9e
255.66.111.159 0:0:0:0:0:ffff:ff42:6f9f
255.66.111.160 0:0:0:0:0:ffff:ff42:6fa0
255.66.111.161 0:0:0:0:0:ffff:ff42:6fa1
255.66.111.162 0:0:0:0:0:ffff:ff42:6fa2
255.66.111.163 0:0:0:0:0:ffff:ff42:6fa3
255.66.111.164 0:0:0:0:0:ffff:ff42:6fa4
255.66.111.165 0:0:0:0:0:ffff:ff42:6fa5
255.66.111.166 0:0:0:0:0:ffff:ff42:6fa6
255.66.111.167 0:0:0:0:0:ffff:ff42:6fa7
255.66.111.168 0:0:0:0:0:ffff:ff42:6fa8
255.66.111.169 0:0:0:0:0:ffff:ff42:6fa9
255.66.111.170 0:0:0:0:0:ffff:ff42:6faa
255.66.111.171 0:0:0:0:0:ffff:ff42:6fab
255.66.111.172 0:0:0:0:0:ffff:ff42:6fac
255.66.111.173 0:0:0:0:0:ffff:ff42:6fad
255.66.111.174 0:0:0:0:0:ffff:ff42:6fae
255.66.111.175 0:0:0:0:0:ffff:ff42:6faf
255.66.111.176 0:0:0:0:0:ffff:ff42:6fb0
255.66.111.177 0:0:0:0:0:ffff:ff42:6fb1
255.66.111.178 0:0:0:0:0:ffff:ff42:6fb2
255.66.111.179 0:0:0:0:0:ffff:ff42:6fb3
255.66.111.180 0:0:0:0:0:ffff:ff42:6fb4


255.66.111.181 0:0:0:0:0:ffff:ff42:6fb5
255.66.111.182 0:0:0:0:0:ffff:ff42:6fb6
255.66.111.183 0:0:0:0:0:ffff:ff42:6fb7
255.66.111.184 0:0:0:0:0:ffff:ff42:6fb8
255.66.111.185 0:0:0:0:0:ffff:ff42:6fb9
255.66.111.186 0:0:0:0:0:ffff:ff42:6fba
255.66.111.187 0:0:0:0:0:ffff:ff42:6fbb
255.66.111.188 0:0:0:0:0:ffff:ff42:6fbc
255.66.111.189 0:0:0:0:0:ffff:ff42:6fbd
255.66.111.190 0:0:0:0:0:ffff:ff42:6fbe
255.66.111.191 0:0:0:0:0:ffff:ff42:6fbf
255.66.111.192 0:0:0:0:0:ffff:ff42:6fc0
255.66.111.193 0:0:0:0:0:ffff:ff42:6fc1
255.66.111.194 0:0:0:0:0:ffff:ff42:6fc2
255.66.111.195 0:0:0:0:0:ffff:ff42:6fc3
255.66.111.196 0:0:0:0:0:ffff:ff42:6fc4
255.66.111.197 0:0:0:0:0:ffff:ff42:6fc5
255.66.111.198 0:0:0:0:0:ffff:ff42:6fc6
255.66.111.199 0:0:0:0:0:ffff:ff42:6fc7
255.66.111.200 0:0:0:0:0:ffff:ff42:6fc8
255.66.111.201 0:0:0:0:0:ffff:ff42:6fc9
255.66.111.202 0:0:0:0:0:ffff:ff42:6fca
255.66.111.203 0:0:0:0:0:ffff:ff42:6fcb
255.66.111.204 0:0:0:0:0:ffff:ff42:6fcc
255.66.111.205 0:0:0:0:0:ffff:ff42:6fcd
255.66.111.206 0:0:0:0:0:ffff:ff42:6fce
255.66.111.207 0:0:0:0:0:ffff:ff42:6fcf
255.66.111.208 0:0:0:0:0:ffff:ff42:6fd0
255.66.111.209 0:0:0:0:0:ffff:ff42:6fd1
255.66.111.210 0:0:0:0:0:ffff:ff42:6fd2
255.66.111.211 0:0:0:0:0:ffff:ff42:6fd3
255.66.111.212 0:0:0:0:0:ffff:ff42:6fd4
255.66.111.213 0:0:0:0:0:ffff:ff42:6fd5
255.66.111.214 0:0:0:0:0:ffff:ff42:6fd6
255.66.111.215 0:0:0:0:0:ffff:ff42:6fd7
255.66.111.216 0:0:0:0:0:ffff:ff42:6fd8
255.66.111.217 0:0:0:0:0:ffff:ff42:6fd9
255.66.111.218 0:0:0:0:0:ffff:ff42:6fda
255.66.111.219 0:0:0:0:0:ffff:ff42:6fdb
255.66.111.220 0:0:0:0:0:ffff:ff42:6fdc
255.66.111.221 0:0:0:0:0:ffff:ff42:6fdd
255.66.111.222 0:0:0:0:0:ffff:ff42:6fde
255.66.111.223 0:0:0:0:0:ffff:ff42:6fdf
255.66.111.224 0:0:0:0:0:ffff:ff42:6fe0
255.66.111.225 0:0:0:0:0:ffff:ff42:6fe1
255.66.111.226 0:0:0:0:0:ffff:ff42:6fe2
255.66.111.227 0:0:0:0:0:ffff:ff42:6fe3
255.66.111.228 0:0:0:0:0:ffff:ff42:6fe4
255.66.111.229 0:0:0:0:0:ffff:ff42:6fe5
255.66.111.230 0:0:0:0:0:ffff:ff42:6fe6
255.66.111.231 0:0:0:0:0:ffff:ff42:6fe7
255.66.111.232 0:0:0:0:0:ffff:ff42:6fe8
255.66.111.233 0:0:0:0:0:ffff:ff42:6fe9
255.66.111.234 0:0:0:0:0:ffff:ff42:6fea
255.66.111.235 0:0:0:0:0:ffff:ff42:6feb
255.66.111.236 0:0:0:0:0:ffff:ff42:6fec
255.66.111.237 0:0:0:0:0:ffff:ff42:6fed
255.66.111.238 0:0:0:0:0:ffff:ff42:6fee
255.66.111.239 0:0:0:0:0:ffff:ff42:6fef
255.66.111.240 0:0:0:0:0:ffff:ff42:6ff0
255.66.111.241 0:0:0:0:0:ffff:ff42:6ff1
255.66.111.242 0:0:0:0:0:ffff:ff42:6ff2
255.66.111.243 0:0:0:0:0:ffff:ff42:6ff3
255.66.111.244 0:0:0:0:0:ffff:ff42:6ff4
255.66.111.245 0:0:0:0:0:ffff:ff42:6ff5
255.66.111.246 0:0:0:0:0:ffff:ff42:6ff6
255.66.111.247 0:0:0:0:0:ffff:ff42:6ff7
255.66.111.248 0:0:0:0:0:ffff:ff42:6ff8
255.66.111.249 0:0:0:0:0:ffff:ff42:6ff9
255.66.111.250 0:0:0:0:0:ffff:ff42:6ffa
255.66.111.251 0:0:0:0:0:ffff:ff42:6ffb
255.66.111.252 0:0:0:0:0:ffff:ff42:6ffc
255.66.111.253 0:0:0:0:0:ffff:ff42:6ffd
255.66.111.254 0:0:0:0:0:ffff:ff42:6ffe
255.66.111.255 0:0:0:0:0:ffff:ff42:6fff


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.