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
157.187.81.1 0:0:0:0:0:ffff:9dbb:5101
157.187.81.2 0:0:0:0:0:ffff:9dbb:5102
157.187.81.3 0:0:0:0:0:ffff:9dbb:5103
157.187.81.4 0:0:0:0:0:ffff:9dbb:5104
157.187.81.5 0:0:0:0:0:ffff:9dbb:5105
157.187.81.6 0:0:0:0:0:ffff:9dbb:5106
157.187.81.7 0:0:0:0:0:ffff:9dbb:5107
157.187.81.8 0:0:0:0:0:ffff:9dbb:5108
157.187.81.9 0:0:0:0:0:ffff:9dbb:5109
157.187.81.10 0:0:0:0:0:ffff:9dbb:510a
157.187.81.11 0:0:0:0:0:ffff:9dbb:510b
157.187.81.12 0:0:0:0:0:ffff:9dbb:510c
157.187.81.13 0:0:0:0:0:ffff:9dbb:510d
157.187.81.14 0:0:0:0:0:ffff:9dbb:510e
157.187.81.15 0:0:0:0:0:ffff:9dbb:510f
157.187.81.16 0:0:0:0:0:ffff:9dbb:5110
157.187.81.17 0:0:0:0:0:ffff:9dbb:5111
157.187.81.18 0:0:0:0:0:ffff:9dbb:5112
157.187.81.19 0:0:0:0:0:ffff:9dbb:5113
157.187.81.20 0:0:0:0:0:ffff:9dbb:5114
157.187.81.21 0:0:0:0:0:ffff:9dbb:5115
157.187.81.22 0:0:0:0:0:ffff:9dbb:5116
157.187.81.23 0:0:0:0:0:ffff:9dbb:5117
157.187.81.24 0:0:0:0:0:ffff:9dbb:5118
157.187.81.25 0:0:0:0:0:ffff:9dbb:5119
157.187.81.26 0:0:0:0:0:ffff:9dbb:511a
157.187.81.27 0:0:0:0:0:ffff:9dbb:511b
157.187.81.28 0:0:0:0:0:ffff:9dbb:511c
157.187.81.29 0:0:0:0:0:ffff:9dbb:511d
157.187.81.30 0:0:0:0:0:ffff:9dbb:511e
157.187.81.31 0:0:0:0:0:ffff:9dbb:511f
157.187.81.32 0:0:0:0:0:ffff:9dbb:5120
157.187.81.33 0:0:0:0:0:ffff:9dbb:5121
157.187.81.34 0:0:0:0:0:ffff:9dbb:5122
157.187.81.35 0:0:0:0:0:ffff:9dbb:5123
157.187.81.36 0:0:0:0:0:ffff:9dbb:5124
157.187.81.37 0:0:0:0:0:ffff:9dbb:5125
157.187.81.38 0:0:0:0:0:ffff:9dbb:5126
157.187.81.39 0:0:0:0:0:ffff:9dbb:5127
157.187.81.40 0:0:0:0:0:ffff:9dbb:5128
157.187.81.41 0:0:0:0:0:ffff:9dbb:5129
157.187.81.42 0:0:0:0:0:ffff:9dbb:512a
157.187.81.43 0:0:0:0:0:ffff:9dbb:512b
157.187.81.44 0:0:0:0:0:ffff:9dbb:512c
157.187.81.45 0:0:0:0:0:ffff:9dbb:512d
157.187.81.46 0:0:0:0:0:ffff:9dbb:512e
157.187.81.47 0:0:0:0:0:ffff:9dbb:512f
157.187.81.48 0:0:0:0:0:ffff:9dbb:5130
157.187.81.49 0:0:0:0:0:ffff:9dbb:5131
157.187.81.50 0:0:0:0:0:ffff:9dbb:5132
157.187.81.51 0:0:0:0:0:ffff:9dbb:5133
157.187.81.52 0:0:0:0:0:ffff:9dbb:5134
157.187.81.53 0:0:0:0:0:ffff:9dbb:5135
157.187.81.54 0:0:0:0:0:ffff:9dbb:5136
157.187.81.55 0:0:0:0:0:ffff:9dbb:5137
157.187.81.56 0:0:0:0:0:ffff:9dbb:5138
157.187.81.57 0:0:0:0:0:ffff:9dbb:5139
157.187.81.58 0:0:0:0:0:ffff:9dbb:513a
157.187.81.59 0:0:0:0:0:ffff:9dbb:513b
157.187.81.60 0:0:0:0:0:ffff:9dbb:513c


157.187.81.61 0:0:0:0:0:ffff:9dbb:513d
157.187.81.62 0:0:0:0:0:ffff:9dbb:513e
157.187.81.63 0:0:0:0:0:ffff:9dbb:513f
157.187.81.64 0:0:0:0:0:ffff:9dbb:5140
157.187.81.65 0:0:0:0:0:ffff:9dbb:5141
157.187.81.66 0:0:0:0:0:ffff:9dbb:5142
157.187.81.67 0:0:0:0:0:ffff:9dbb:5143
157.187.81.68 0:0:0:0:0:ffff:9dbb:5144
157.187.81.69 0:0:0:0:0:ffff:9dbb:5145
157.187.81.70 0:0:0:0:0:ffff:9dbb:5146
157.187.81.71 0:0:0:0:0:ffff:9dbb:5147
157.187.81.72 0:0:0:0:0:ffff:9dbb:5148
157.187.81.73 0:0:0:0:0:ffff:9dbb:5149
157.187.81.74 0:0:0:0:0:ffff:9dbb:514a
157.187.81.75 0:0:0:0:0:ffff:9dbb:514b
157.187.81.76 0:0:0:0:0:ffff:9dbb:514c
157.187.81.77 0:0:0:0:0:ffff:9dbb:514d
157.187.81.78 0:0:0:0:0:ffff:9dbb:514e
157.187.81.79 0:0:0:0:0:ffff:9dbb:514f
157.187.81.80 0:0:0:0:0:ffff:9dbb:5150
157.187.81.81 0:0:0:0:0:ffff:9dbb:5151
157.187.81.82 0:0:0:0:0:ffff:9dbb:5152
157.187.81.83 0:0:0:0:0:ffff:9dbb:5153
157.187.81.84 0:0:0:0:0:ffff:9dbb:5154
157.187.81.85 0:0:0:0:0:ffff:9dbb:5155
157.187.81.86 0:0:0:0:0:ffff:9dbb:5156
157.187.81.87 0:0:0:0:0:ffff:9dbb:5157
157.187.81.88 0:0:0:0:0:ffff:9dbb:5158
157.187.81.89 0:0:0:0:0:ffff:9dbb:5159
157.187.81.90 0:0:0:0:0:ffff:9dbb:515a
157.187.81.91 0:0:0:0:0:ffff:9dbb:515b
157.187.81.92 0:0:0:0:0:ffff:9dbb:515c
157.187.81.93 0:0:0:0:0:ffff:9dbb:515d
157.187.81.94 0:0:0:0:0:ffff:9dbb:515e
157.187.81.95 0:0:0:0:0:ffff:9dbb:515f
157.187.81.96 0:0:0:0:0:ffff:9dbb:5160
157.187.81.97 0:0:0:0:0:ffff:9dbb:5161
157.187.81.98 0:0:0:0:0:ffff:9dbb:5162
157.187.81.99 0:0:0:0:0:ffff:9dbb:5163
157.187.81.100 0:0:0:0:0:ffff:9dbb:5164
157.187.81.101 0:0:0:0:0:ffff:9dbb:5165
157.187.81.102 0:0:0:0:0:ffff:9dbb:5166
157.187.81.103 0:0:0:0:0:ffff:9dbb:5167
157.187.81.104 0:0:0:0:0:ffff:9dbb:5168
157.187.81.105 0:0:0:0:0:ffff:9dbb:5169
157.187.81.106 0:0:0:0:0:ffff:9dbb:516a
157.187.81.107 0:0:0:0:0:ffff:9dbb:516b
157.187.81.108 0:0:0:0:0:ffff:9dbb:516c
157.187.81.109 0:0:0:0:0:ffff:9dbb:516d
157.187.81.110 0:0:0:0:0:ffff:9dbb:516e
157.187.81.111 0:0:0:0:0:ffff:9dbb:516f
157.187.81.112 0:0:0:0:0:ffff:9dbb:5170
157.187.81.113 0:0:0:0:0:ffff:9dbb:5171
157.187.81.114 0:0:0:0:0:ffff:9dbb:5172
157.187.81.115 0:0:0:0:0:ffff:9dbb:5173
157.187.81.116 0:0:0:0:0:ffff:9dbb:5174
157.187.81.117 0:0:0:0:0:ffff:9dbb:5175
157.187.81.118 0:0:0:0:0:ffff:9dbb:5176
157.187.81.119 0:0:0:0:0:ffff:9dbb:5177
157.187.81.120 0:0:0:0:0:ffff:9dbb:5178


157.187.81.121 0:0:0:0:0:ffff:9dbb:5179
157.187.81.122 0:0:0:0:0:ffff:9dbb:517a
157.187.81.123 0:0:0:0:0:ffff:9dbb:517b
157.187.81.124 0:0:0:0:0:ffff:9dbb:517c
157.187.81.125 0:0:0:0:0:ffff:9dbb:517d
157.187.81.126 0:0:0:0:0:ffff:9dbb:517e
157.187.81.127 0:0:0:0:0:ffff:9dbb:517f
157.187.81.128 0:0:0:0:0:ffff:9dbb:5180
157.187.81.129 0:0:0:0:0:ffff:9dbb:5181
157.187.81.130 0:0:0:0:0:ffff:9dbb:5182
157.187.81.131 0:0:0:0:0:ffff:9dbb:5183
157.187.81.132 0:0:0:0:0:ffff:9dbb:5184
157.187.81.133 0:0:0:0:0:ffff:9dbb:5185
157.187.81.134 0:0:0:0:0:ffff:9dbb:5186
157.187.81.135 0:0:0:0:0:ffff:9dbb:5187
157.187.81.136 0:0:0:0:0:ffff:9dbb:5188
157.187.81.137 0:0:0:0:0:ffff:9dbb:5189
157.187.81.138 0:0:0:0:0:ffff:9dbb:518a
157.187.81.139 0:0:0:0:0:ffff:9dbb:518b
157.187.81.140 0:0:0:0:0:ffff:9dbb:518c
157.187.81.141 0:0:0:0:0:ffff:9dbb:518d
157.187.81.142 0:0:0:0:0:ffff:9dbb:518e
157.187.81.143 0:0:0:0:0:ffff:9dbb:518f
157.187.81.144 0:0:0:0:0:ffff:9dbb:5190
157.187.81.145 0:0:0:0:0:ffff:9dbb:5191
157.187.81.146 0:0:0:0:0:ffff:9dbb:5192
157.187.81.147 0:0:0:0:0:ffff:9dbb:5193
157.187.81.148 0:0:0:0:0:ffff:9dbb:5194
157.187.81.149 0:0:0:0:0:ffff:9dbb:5195
157.187.81.150 0:0:0:0:0:ffff:9dbb:5196
157.187.81.151 0:0:0:0:0:ffff:9dbb:5197
157.187.81.152 0:0:0:0:0:ffff:9dbb:5198
157.187.81.153 0:0:0:0:0:ffff:9dbb:5199
157.187.81.154 0:0:0:0:0:ffff:9dbb:519a
157.187.81.155 0:0:0:0:0:ffff:9dbb:519b
157.187.81.156 0:0:0:0:0:ffff:9dbb:519c
157.187.81.157 0:0:0:0:0:ffff:9dbb:519d
157.187.81.158 0:0:0:0:0:ffff:9dbb:519e
157.187.81.159 0:0:0:0:0:ffff:9dbb:519f
157.187.81.160 0:0:0:0:0:ffff:9dbb:51a0
157.187.81.161 0:0:0:0:0:ffff:9dbb:51a1
157.187.81.162 0:0:0:0:0:ffff:9dbb:51a2
157.187.81.163 0:0:0:0:0:ffff:9dbb:51a3
157.187.81.164 0:0:0:0:0:ffff:9dbb:51a4
157.187.81.165 0:0:0:0:0:ffff:9dbb:51a5
157.187.81.166 0:0:0:0:0:ffff:9dbb:51a6
157.187.81.167 0:0:0:0:0:ffff:9dbb:51a7
157.187.81.168 0:0:0:0:0:ffff:9dbb:51a8
157.187.81.169 0:0:0:0:0:ffff:9dbb:51a9
157.187.81.170 0:0:0:0:0:ffff:9dbb:51aa
157.187.81.171 0:0:0:0:0:ffff:9dbb:51ab
157.187.81.172 0:0:0:0:0:ffff:9dbb:51ac
157.187.81.173 0:0:0:0:0:ffff:9dbb:51ad
157.187.81.174 0:0:0:0:0:ffff:9dbb:51ae
157.187.81.175 0:0:0:0:0:ffff:9dbb:51af
157.187.81.176 0:0:0:0:0:ffff:9dbb:51b0
157.187.81.177 0:0:0:0:0:ffff:9dbb:51b1
157.187.81.178 0:0:0:0:0:ffff:9dbb:51b2
157.187.81.179 0:0:0:0:0:ffff:9dbb:51b3
157.187.81.180 0:0:0:0:0:ffff:9dbb:51b4


157.187.81.181 0:0:0:0:0:ffff:9dbb:51b5
157.187.81.182 0:0:0:0:0:ffff:9dbb:51b6
157.187.81.183 0:0:0:0:0:ffff:9dbb:51b7
157.187.81.184 0:0:0:0:0:ffff:9dbb:51b8
157.187.81.185 0:0:0:0:0:ffff:9dbb:51b9
157.187.81.186 0:0:0:0:0:ffff:9dbb:51ba
157.187.81.187 0:0:0:0:0:ffff:9dbb:51bb
157.187.81.188 0:0:0:0:0:ffff:9dbb:51bc
157.187.81.189 0:0:0:0:0:ffff:9dbb:51bd
157.187.81.190 0:0:0:0:0:ffff:9dbb:51be
157.187.81.191 0:0:0:0:0:ffff:9dbb:51bf
157.187.81.192 0:0:0:0:0:ffff:9dbb:51c0
157.187.81.193 0:0:0:0:0:ffff:9dbb:51c1
157.187.81.194 0:0:0:0:0:ffff:9dbb:51c2
157.187.81.195 0:0:0:0:0:ffff:9dbb:51c3
157.187.81.196 0:0:0:0:0:ffff:9dbb:51c4
157.187.81.197 0:0:0:0:0:ffff:9dbb:51c5
157.187.81.198 0:0:0:0:0:ffff:9dbb:51c6
157.187.81.199 0:0:0:0:0:ffff:9dbb:51c7
157.187.81.200 0:0:0:0:0:ffff:9dbb:51c8
157.187.81.201 0:0:0:0:0:ffff:9dbb:51c9
157.187.81.202 0:0:0:0:0:ffff:9dbb:51ca
157.187.81.203 0:0:0:0:0:ffff:9dbb:51cb
157.187.81.204 0:0:0:0:0:ffff:9dbb:51cc
157.187.81.205 0:0:0:0:0:ffff:9dbb:51cd
157.187.81.206 0:0:0:0:0:ffff:9dbb:51ce
157.187.81.207 0:0:0:0:0:ffff:9dbb:51cf
157.187.81.208 0:0:0:0:0:ffff:9dbb:51d0
157.187.81.209 0:0:0:0:0:ffff:9dbb:51d1
157.187.81.210 0:0:0:0:0:ffff:9dbb:51d2
157.187.81.211 0:0:0:0:0:ffff:9dbb:51d3
157.187.81.212 0:0:0:0:0:ffff:9dbb:51d4
157.187.81.213 0:0:0:0:0:ffff:9dbb:51d5
157.187.81.214 0:0:0:0:0:ffff:9dbb:51d6
157.187.81.215 0:0:0:0:0:ffff:9dbb:51d7
157.187.81.216 0:0:0:0:0:ffff:9dbb:51d8
157.187.81.217 0:0:0:0:0:ffff:9dbb:51d9
157.187.81.218 0:0:0:0:0:ffff:9dbb:51da
157.187.81.219 0:0:0:0:0:ffff:9dbb:51db
157.187.81.220 0:0:0:0:0:ffff:9dbb:51dc
157.187.81.221 0:0:0:0:0:ffff:9dbb:51dd
157.187.81.222 0:0:0:0:0:ffff:9dbb:51de
157.187.81.223 0:0:0:0:0:ffff:9dbb:51df
157.187.81.224 0:0:0:0:0:ffff:9dbb:51e0
157.187.81.225 0:0:0:0:0:ffff:9dbb:51e1
157.187.81.226 0:0:0:0:0:ffff:9dbb:51e2
157.187.81.227 0:0:0:0:0:ffff:9dbb:51e3
157.187.81.228 0:0:0:0:0:ffff:9dbb:51e4
157.187.81.229 0:0:0:0:0:ffff:9dbb:51e5
157.187.81.230 0:0:0:0:0:ffff:9dbb:51e6
157.187.81.231 0:0:0:0:0:ffff:9dbb:51e7
157.187.81.232 0:0:0:0:0:ffff:9dbb:51e8
157.187.81.233 0:0:0:0:0:ffff:9dbb:51e9
157.187.81.234 0:0:0:0:0:ffff:9dbb:51ea
157.187.81.235 0:0:0:0:0:ffff:9dbb:51eb
157.187.81.236 0:0:0:0:0:ffff:9dbb:51ec
157.187.81.237 0:0:0:0:0:ffff:9dbb:51ed
157.187.81.238 0:0:0:0:0:ffff:9dbb:51ee
157.187.81.239 0:0:0:0:0:ffff:9dbb:51ef
157.187.81.240 0:0:0:0:0:ffff:9dbb:51f0
157.187.81.241 0:0:0:0:0:ffff:9dbb:51f1
157.187.81.242 0:0:0:0:0:ffff:9dbb:51f2
157.187.81.243 0:0:0:0:0:ffff:9dbb:51f3
157.187.81.244 0:0:0:0:0:ffff:9dbb:51f4
157.187.81.245 0:0:0:0:0:ffff:9dbb:51f5
157.187.81.246 0:0:0:0:0:ffff:9dbb:51f6
157.187.81.247 0:0:0:0:0:ffff:9dbb:51f7
157.187.81.248 0:0:0:0:0:ffff:9dbb:51f8
157.187.81.249 0:0:0:0:0:ffff:9dbb:51f9
157.187.81.250 0:0:0:0:0:ffff:9dbb:51fa
157.187.81.251 0:0:0:0:0:ffff:9dbb:51fb
157.187.81.252 0:0:0:0:0:ffff:9dbb:51fc
157.187.81.253 0:0:0:0:0:ffff:9dbb:51fd
157.187.81.254 0:0:0:0:0:ffff:9dbb:51fe
157.187.81.255 0:0:0:0:0:ffff:9dbb:51ff


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.