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
81.56.15.1 0:0:0:0:0:ffff:5138:f01
81.56.15.2 0:0:0:0:0:ffff:5138:f02
81.56.15.3 0:0:0:0:0:ffff:5138:f03
81.56.15.4 0:0:0:0:0:ffff:5138:f04
81.56.15.5 0:0:0:0:0:ffff:5138:f05
81.56.15.6 0:0:0:0:0:ffff:5138:f06
81.56.15.7 0:0:0:0:0:ffff:5138:f07
81.56.15.8 0:0:0:0:0:ffff:5138:f08
81.56.15.9 0:0:0:0:0:ffff:5138:f09
81.56.15.10 0:0:0:0:0:ffff:5138:f0a
81.56.15.11 0:0:0:0:0:ffff:5138:f0b
81.56.15.12 0:0:0:0:0:ffff:5138:f0c
81.56.15.13 0:0:0:0:0:ffff:5138:f0d
81.56.15.14 0:0:0:0:0:ffff:5138:f0e
81.56.15.15 0:0:0:0:0:ffff:5138:f0f
81.56.15.16 0:0:0:0:0:ffff:5138:f10
81.56.15.17 0:0:0:0:0:ffff:5138:f11
81.56.15.18 0:0:0:0:0:ffff:5138:f12
81.56.15.19 0:0:0:0:0:ffff:5138:f13
81.56.15.20 0:0:0:0:0:ffff:5138:f14
81.56.15.21 0:0:0:0:0:ffff:5138:f15
81.56.15.22 0:0:0:0:0:ffff:5138:f16
81.56.15.23 0:0:0:0:0:ffff:5138:f17
81.56.15.24 0:0:0:0:0:ffff:5138:f18
81.56.15.25 0:0:0:0:0:ffff:5138:f19
81.56.15.26 0:0:0:0:0:ffff:5138:f1a
81.56.15.27 0:0:0:0:0:ffff:5138:f1b
81.56.15.28 0:0:0:0:0:ffff:5138:f1c
81.56.15.29 0:0:0:0:0:ffff:5138:f1d
81.56.15.30 0:0:0:0:0:ffff:5138:f1e
81.56.15.31 0:0:0:0:0:ffff:5138:f1f
81.56.15.32 0:0:0:0:0:ffff:5138:f20
81.56.15.33 0:0:0:0:0:ffff:5138:f21
81.56.15.34 0:0:0:0:0:ffff:5138:f22
81.56.15.35 0:0:0:0:0:ffff:5138:f23
81.56.15.36 0:0:0:0:0:ffff:5138:f24
81.56.15.37 0:0:0:0:0:ffff:5138:f25
81.56.15.38 0:0:0:0:0:ffff:5138:f26
81.56.15.39 0:0:0:0:0:ffff:5138:f27
81.56.15.40 0:0:0:0:0:ffff:5138:f28
81.56.15.41 0:0:0:0:0:ffff:5138:f29
81.56.15.42 0:0:0:0:0:ffff:5138:f2a
81.56.15.43 0:0:0:0:0:ffff:5138:f2b
81.56.15.44 0:0:0:0:0:ffff:5138:f2c
81.56.15.45 0:0:0:0:0:ffff:5138:f2d
81.56.15.46 0:0:0:0:0:ffff:5138:f2e
81.56.15.47 0:0:0:0:0:ffff:5138:f2f
81.56.15.48 0:0:0:0:0:ffff:5138:f30
81.56.15.49 0:0:0:0:0:ffff:5138:f31
81.56.15.50 0:0:0:0:0:ffff:5138:f32
81.56.15.51 0:0:0:0:0:ffff:5138:f33
81.56.15.52 0:0:0:0:0:ffff:5138:f34
81.56.15.53 0:0:0:0:0:ffff:5138:f35
81.56.15.54 0:0:0:0:0:ffff:5138:f36
81.56.15.55 0:0:0:0:0:ffff:5138:f37
81.56.15.56 0:0:0:0:0:ffff:5138:f38
81.56.15.57 0:0:0:0:0:ffff:5138:f39
81.56.15.58 0:0:0:0:0:ffff:5138:f3a
81.56.15.59 0:0:0:0:0:ffff:5138:f3b
81.56.15.60 0:0:0:0:0:ffff:5138:f3c


81.56.15.61 0:0:0:0:0:ffff:5138:f3d
81.56.15.62 0:0:0:0:0:ffff:5138:f3e
81.56.15.63 0:0:0:0:0:ffff:5138:f3f
81.56.15.64 0:0:0:0:0:ffff:5138:f40
81.56.15.65 0:0:0:0:0:ffff:5138:f41
81.56.15.66 0:0:0:0:0:ffff:5138:f42
81.56.15.67 0:0:0:0:0:ffff:5138:f43
81.56.15.68 0:0:0:0:0:ffff:5138:f44
81.56.15.69 0:0:0:0:0:ffff:5138:f45
81.56.15.70 0:0:0:0:0:ffff:5138:f46
81.56.15.71 0:0:0:0:0:ffff:5138:f47
81.56.15.72 0:0:0:0:0:ffff:5138:f48
81.56.15.73 0:0:0:0:0:ffff:5138:f49
81.56.15.74 0:0:0:0:0:ffff:5138:f4a
81.56.15.75 0:0:0:0:0:ffff:5138:f4b
81.56.15.76 0:0:0:0:0:ffff:5138:f4c
81.56.15.77 0:0:0:0:0:ffff:5138:f4d
81.56.15.78 0:0:0:0:0:ffff:5138:f4e
81.56.15.79 0:0:0:0:0:ffff:5138:f4f
81.56.15.80 0:0:0:0:0:ffff:5138:f50
81.56.15.81 0:0:0:0:0:ffff:5138:f51
81.56.15.82 0:0:0:0:0:ffff:5138:f52
81.56.15.83 0:0:0:0:0:ffff:5138:f53
81.56.15.84 0:0:0:0:0:ffff:5138:f54
81.56.15.85 0:0:0:0:0:ffff:5138:f55
81.56.15.86 0:0:0:0:0:ffff:5138:f56
81.56.15.87 0:0:0:0:0:ffff:5138:f57
81.56.15.88 0:0:0:0:0:ffff:5138:f58
81.56.15.89 0:0:0:0:0:ffff:5138:f59
81.56.15.90 0:0:0:0:0:ffff:5138:f5a
81.56.15.91 0:0:0:0:0:ffff:5138:f5b
81.56.15.92 0:0:0:0:0:ffff:5138:f5c
81.56.15.93 0:0:0:0:0:ffff:5138:f5d
81.56.15.94 0:0:0:0:0:ffff:5138:f5e
81.56.15.95 0:0:0:0:0:ffff:5138:f5f
81.56.15.96 0:0:0:0:0:ffff:5138:f60
81.56.15.97 0:0:0:0:0:ffff:5138:f61
81.56.15.98 0:0:0:0:0:ffff:5138:f62
81.56.15.99 0:0:0:0:0:ffff:5138:f63
81.56.15.100 0:0:0:0:0:ffff:5138:f64
81.56.15.101 0:0:0:0:0:ffff:5138:f65
81.56.15.102 0:0:0:0:0:ffff:5138:f66
81.56.15.103 0:0:0:0:0:ffff:5138:f67
81.56.15.104 0:0:0:0:0:ffff:5138:f68
81.56.15.105 0:0:0:0:0:ffff:5138:f69
81.56.15.106 0:0:0:0:0:ffff:5138:f6a
81.56.15.107 0:0:0:0:0:ffff:5138:f6b
81.56.15.108 0:0:0:0:0:ffff:5138:f6c
81.56.15.109 0:0:0:0:0:ffff:5138:f6d
81.56.15.110 0:0:0:0:0:ffff:5138:f6e
81.56.15.111 0:0:0:0:0:ffff:5138:f6f
81.56.15.112 0:0:0:0:0:ffff:5138:f70
81.56.15.113 0:0:0:0:0:ffff:5138:f71
81.56.15.114 0:0:0:0:0:ffff:5138:f72
81.56.15.115 0:0:0:0:0:ffff:5138:f73
81.56.15.116 0:0:0:0:0:ffff:5138:f74
81.56.15.117 0:0:0:0:0:ffff:5138:f75
81.56.15.118 0:0:0:0:0:ffff:5138:f76
81.56.15.119 0:0:0:0:0:ffff:5138:f77
81.56.15.120 0:0:0:0:0:ffff:5138:f78


81.56.15.121 0:0:0:0:0:ffff:5138:f79
81.56.15.122 0:0:0:0:0:ffff:5138:f7a
81.56.15.123 0:0:0:0:0:ffff:5138:f7b
81.56.15.124 0:0:0:0:0:ffff:5138:f7c
81.56.15.125 0:0:0:0:0:ffff:5138:f7d
81.56.15.126 0:0:0:0:0:ffff:5138:f7e
81.56.15.127 0:0:0:0:0:ffff:5138:f7f
81.56.15.128 0:0:0:0:0:ffff:5138:f80
81.56.15.129 0:0:0:0:0:ffff:5138:f81
81.56.15.130 0:0:0:0:0:ffff:5138:f82
81.56.15.131 0:0:0:0:0:ffff:5138:f83
81.56.15.132 0:0:0:0:0:ffff:5138:f84
81.56.15.133 0:0:0:0:0:ffff:5138:f85
81.56.15.134 0:0:0:0:0:ffff:5138:f86
81.56.15.135 0:0:0:0:0:ffff:5138:f87
81.56.15.136 0:0:0:0:0:ffff:5138:f88
81.56.15.137 0:0:0:0:0:ffff:5138:f89
81.56.15.138 0:0:0:0:0:ffff:5138:f8a
81.56.15.139 0:0:0:0:0:ffff:5138:f8b
81.56.15.140 0:0:0:0:0:ffff:5138:f8c
81.56.15.141 0:0:0:0:0:ffff:5138:f8d
81.56.15.142 0:0:0:0:0:ffff:5138:f8e
81.56.15.143 0:0:0:0:0:ffff:5138:f8f
81.56.15.144 0:0:0:0:0:ffff:5138:f90
81.56.15.145 0:0:0:0:0:ffff:5138:f91
81.56.15.146 0:0:0:0:0:ffff:5138:f92
81.56.15.147 0:0:0:0:0:ffff:5138:f93
81.56.15.148 0:0:0:0:0:ffff:5138:f94
81.56.15.149 0:0:0:0:0:ffff:5138:f95
81.56.15.150 0:0:0:0:0:ffff:5138:f96
81.56.15.151 0:0:0:0:0:ffff:5138:f97
81.56.15.152 0:0:0:0:0:ffff:5138:f98
81.56.15.153 0:0:0:0:0:ffff:5138:f99
81.56.15.154 0:0:0:0:0:ffff:5138:f9a
81.56.15.155 0:0:0:0:0:ffff:5138:f9b
81.56.15.156 0:0:0:0:0:ffff:5138:f9c
81.56.15.157 0:0:0:0:0:ffff:5138:f9d
81.56.15.158 0:0:0:0:0:ffff:5138:f9e
81.56.15.159 0:0:0:0:0:ffff:5138:f9f
81.56.15.160 0:0:0:0:0:ffff:5138:fa0
81.56.15.161 0:0:0:0:0:ffff:5138:fa1
81.56.15.162 0:0:0:0:0:ffff:5138:fa2
81.56.15.163 0:0:0:0:0:ffff:5138:fa3
81.56.15.164 0:0:0:0:0:ffff:5138:fa4
81.56.15.165 0:0:0:0:0:ffff:5138:fa5
81.56.15.166 0:0:0:0:0:ffff:5138:fa6
81.56.15.167 0:0:0:0:0:ffff:5138:fa7
81.56.15.168 0:0:0:0:0:ffff:5138:fa8
81.56.15.169 0:0:0:0:0:ffff:5138:fa9
81.56.15.170 0:0:0:0:0:ffff:5138:faa
81.56.15.171 0:0:0:0:0:ffff:5138:fab
81.56.15.172 0:0:0:0:0:ffff:5138:fac
81.56.15.173 0:0:0:0:0:ffff:5138:fad
81.56.15.174 0:0:0:0:0:ffff:5138:fae
81.56.15.175 0:0:0:0:0:ffff:5138:faf
81.56.15.176 0:0:0:0:0:ffff:5138:fb0
81.56.15.177 0:0:0:0:0:ffff:5138:fb1
81.56.15.178 0:0:0:0:0:ffff:5138:fb2
81.56.15.179 0:0:0:0:0:ffff:5138:fb3
81.56.15.180 0:0:0:0:0:ffff:5138:fb4


81.56.15.181 0:0:0:0:0:ffff:5138:fb5
81.56.15.182 0:0:0:0:0:ffff:5138:fb6
81.56.15.183 0:0:0:0:0:ffff:5138:fb7
81.56.15.184 0:0:0:0:0:ffff:5138:fb8
81.56.15.185 0:0:0:0:0:ffff:5138:fb9
81.56.15.186 0:0:0:0:0:ffff:5138:fba
81.56.15.187 0:0:0:0:0:ffff:5138:fbb
81.56.15.188 0:0:0:0:0:ffff:5138:fbc
81.56.15.189 0:0:0:0:0:ffff:5138:fbd
81.56.15.190 0:0:0:0:0:ffff:5138:fbe
81.56.15.191 0:0:0:0:0:ffff:5138:fbf
81.56.15.192 0:0:0:0:0:ffff:5138:fc0
81.56.15.193 0:0:0:0:0:ffff:5138:fc1
81.56.15.194 0:0:0:0:0:ffff:5138:fc2
81.56.15.195 0:0:0:0:0:ffff:5138:fc3
81.56.15.196 0:0:0:0:0:ffff:5138:fc4
81.56.15.197 0:0:0:0:0:ffff:5138:fc5
81.56.15.198 0:0:0:0:0:ffff:5138:fc6
81.56.15.199 0:0:0:0:0:ffff:5138:fc7
81.56.15.200 0:0:0:0:0:ffff:5138:fc8
81.56.15.201 0:0:0:0:0:ffff:5138:fc9
81.56.15.202 0:0:0:0:0:ffff:5138:fca
81.56.15.203 0:0:0:0:0:ffff:5138:fcb
81.56.15.204 0:0:0:0:0:ffff:5138:fcc
81.56.15.205 0:0:0:0:0:ffff:5138:fcd
81.56.15.206 0:0:0:0:0:ffff:5138:fce
81.56.15.207 0:0:0:0:0:ffff:5138:fcf
81.56.15.208 0:0:0:0:0:ffff:5138:fd0
81.56.15.209 0:0:0:0:0:ffff:5138:fd1
81.56.15.210 0:0:0:0:0:ffff:5138:fd2
81.56.15.211 0:0:0:0:0:ffff:5138:fd3
81.56.15.212 0:0:0:0:0:ffff:5138:fd4
81.56.15.213 0:0:0:0:0:ffff:5138:fd5
81.56.15.214 0:0:0:0:0:ffff:5138:fd6
81.56.15.215 0:0:0:0:0:ffff:5138:fd7
81.56.15.216 0:0:0:0:0:ffff:5138:fd8
81.56.15.217 0:0:0:0:0:ffff:5138:fd9
81.56.15.218 0:0:0:0:0:ffff:5138:fda
81.56.15.219 0:0:0:0:0:ffff:5138:fdb
81.56.15.220 0:0:0:0:0:ffff:5138:fdc
81.56.15.221 0:0:0:0:0:ffff:5138:fdd
81.56.15.222 0:0:0:0:0:ffff:5138:fde
81.56.15.223 0:0:0:0:0:ffff:5138:fdf
81.56.15.224 0:0:0:0:0:ffff:5138:fe0
81.56.15.225 0:0:0:0:0:ffff:5138:fe1
81.56.15.226 0:0:0:0:0:ffff:5138:fe2
81.56.15.227 0:0:0:0:0:ffff:5138:fe3
81.56.15.228 0:0:0:0:0:ffff:5138:fe4
81.56.15.229 0:0:0:0:0:ffff:5138:fe5
81.56.15.230 0:0:0:0:0:ffff:5138:fe6
81.56.15.231 0:0:0:0:0:ffff:5138:fe7
81.56.15.232 0:0:0:0:0:ffff:5138:fe8
81.56.15.233 0:0:0:0:0:ffff:5138:fe9
81.56.15.234 0:0:0:0:0:ffff:5138:fea
81.56.15.235 0:0:0:0:0:ffff:5138:feb
81.56.15.236 0:0:0:0:0:ffff:5138:fec
81.56.15.237 0:0:0:0:0:ffff:5138:fed
81.56.15.238 0:0:0:0:0:ffff:5138:fee
81.56.15.239 0:0:0:0:0:ffff:5138:fef
81.56.15.240 0:0:0:0:0:ffff:5138:ff0
81.56.15.241 0:0:0:0:0:ffff:5138:ff1
81.56.15.242 0:0:0:0:0:ffff:5138:ff2
81.56.15.243 0:0:0:0:0:ffff:5138:ff3
81.56.15.244 0:0:0:0:0:ffff:5138:ff4
81.56.15.245 0:0:0:0:0:ffff:5138:ff5
81.56.15.246 0:0:0:0:0:ffff:5138:ff6
81.56.15.247 0:0:0:0:0:ffff:5138:ff7
81.56.15.248 0:0:0:0:0:ffff:5138:ff8
81.56.15.249 0:0:0:0:0:ffff:5138:ff9
81.56.15.250 0:0:0:0:0:ffff:5138:ffa
81.56.15.251 0:0:0:0:0:ffff:5138:ffb
81.56.15.252 0:0:0:0:0:ffff:5138:ffc
81.56.15.253 0:0:0:0:0:ffff:5138:ffd
81.56.15.254 0:0:0:0:0:ffff:5138:ffe
81.56.15.255 0:0:0:0:0:ffff:5138:fff


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.