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
37.153.81.1 0:0:0:0:0:ffff:2599:5101
37.153.81.2 0:0:0:0:0:ffff:2599:5102
37.153.81.3 0:0:0:0:0:ffff:2599:5103
37.153.81.4 0:0:0:0:0:ffff:2599:5104
37.153.81.5 0:0:0:0:0:ffff:2599:5105
37.153.81.6 0:0:0:0:0:ffff:2599:5106
37.153.81.7 0:0:0:0:0:ffff:2599:5107
37.153.81.8 0:0:0:0:0:ffff:2599:5108
37.153.81.9 0:0:0:0:0:ffff:2599:5109
37.153.81.10 0:0:0:0:0:ffff:2599:510a
37.153.81.11 0:0:0:0:0:ffff:2599:510b
37.153.81.12 0:0:0:0:0:ffff:2599:510c
37.153.81.13 0:0:0:0:0:ffff:2599:510d
37.153.81.14 0:0:0:0:0:ffff:2599:510e
37.153.81.15 0:0:0:0:0:ffff:2599:510f
37.153.81.16 0:0:0:0:0:ffff:2599:5110
37.153.81.17 0:0:0:0:0:ffff:2599:5111
37.153.81.18 0:0:0:0:0:ffff:2599:5112
37.153.81.19 0:0:0:0:0:ffff:2599:5113
37.153.81.20 0:0:0:0:0:ffff:2599:5114
37.153.81.21 0:0:0:0:0:ffff:2599:5115
37.153.81.22 0:0:0:0:0:ffff:2599:5116
37.153.81.23 0:0:0:0:0:ffff:2599:5117
37.153.81.24 0:0:0:0:0:ffff:2599:5118
37.153.81.25 0:0:0:0:0:ffff:2599:5119
37.153.81.26 0:0:0:0:0:ffff:2599:511a
37.153.81.27 0:0:0:0:0:ffff:2599:511b
37.153.81.28 0:0:0:0:0:ffff:2599:511c
37.153.81.29 0:0:0:0:0:ffff:2599:511d
37.153.81.30 0:0:0:0:0:ffff:2599:511e
37.153.81.31 0:0:0:0:0:ffff:2599:511f
37.153.81.32 0:0:0:0:0:ffff:2599:5120
37.153.81.33 0:0:0:0:0:ffff:2599:5121
37.153.81.34 0:0:0:0:0:ffff:2599:5122
37.153.81.35 0:0:0:0:0:ffff:2599:5123
37.153.81.36 0:0:0:0:0:ffff:2599:5124
37.153.81.37 0:0:0:0:0:ffff:2599:5125
37.153.81.38 0:0:0:0:0:ffff:2599:5126
37.153.81.39 0:0:0:0:0:ffff:2599:5127
37.153.81.40 0:0:0:0:0:ffff:2599:5128
37.153.81.41 0:0:0:0:0:ffff:2599:5129
37.153.81.42 0:0:0:0:0:ffff:2599:512a
37.153.81.43 0:0:0:0:0:ffff:2599:512b
37.153.81.44 0:0:0:0:0:ffff:2599:512c
37.153.81.45 0:0:0:0:0:ffff:2599:512d
37.153.81.46 0:0:0:0:0:ffff:2599:512e
37.153.81.47 0:0:0:0:0:ffff:2599:512f
37.153.81.48 0:0:0:0:0:ffff:2599:5130
37.153.81.49 0:0:0:0:0:ffff:2599:5131
37.153.81.50 0:0:0:0:0:ffff:2599:5132
37.153.81.51 0:0:0:0:0:ffff:2599:5133
37.153.81.52 0:0:0:0:0:ffff:2599:5134
37.153.81.53 0:0:0:0:0:ffff:2599:5135
37.153.81.54 0:0:0:0:0:ffff:2599:5136
37.153.81.55 0:0:0:0:0:ffff:2599:5137
37.153.81.56 0:0:0:0:0:ffff:2599:5138
37.153.81.57 0:0:0:0:0:ffff:2599:5139
37.153.81.58 0:0:0:0:0:ffff:2599:513a
37.153.81.59 0:0:0:0:0:ffff:2599:513b
37.153.81.60 0:0:0:0:0:ffff:2599:513c


37.153.81.61 0:0:0:0:0:ffff:2599:513d
37.153.81.62 0:0:0:0:0:ffff:2599:513e
37.153.81.63 0:0:0:0:0:ffff:2599:513f
37.153.81.64 0:0:0:0:0:ffff:2599:5140
37.153.81.65 0:0:0:0:0:ffff:2599:5141
37.153.81.66 0:0:0:0:0:ffff:2599:5142
37.153.81.67 0:0:0:0:0:ffff:2599:5143
37.153.81.68 0:0:0:0:0:ffff:2599:5144
37.153.81.69 0:0:0:0:0:ffff:2599:5145
37.153.81.70 0:0:0:0:0:ffff:2599:5146
37.153.81.71 0:0:0:0:0:ffff:2599:5147
37.153.81.72 0:0:0:0:0:ffff:2599:5148
37.153.81.73 0:0:0:0:0:ffff:2599:5149
37.153.81.74 0:0:0:0:0:ffff:2599:514a
37.153.81.75 0:0:0:0:0:ffff:2599:514b
37.153.81.76 0:0:0:0:0:ffff:2599:514c
37.153.81.77 0:0:0:0:0:ffff:2599:514d
37.153.81.78 0:0:0:0:0:ffff:2599:514e
37.153.81.79 0:0:0:0:0:ffff:2599:514f
37.153.81.80 0:0:0:0:0:ffff:2599:5150
37.153.81.81 0:0:0:0:0:ffff:2599:5151
37.153.81.82 0:0:0:0:0:ffff:2599:5152
37.153.81.83 0:0:0:0:0:ffff:2599:5153
37.153.81.84 0:0:0:0:0:ffff:2599:5154
37.153.81.85 0:0:0:0:0:ffff:2599:5155
37.153.81.86 0:0:0:0:0:ffff:2599:5156
37.153.81.87 0:0:0:0:0:ffff:2599:5157
37.153.81.88 0:0:0:0:0:ffff:2599:5158
37.153.81.89 0:0:0:0:0:ffff:2599:5159
37.153.81.90 0:0:0:0:0:ffff:2599:515a
37.153.81.91 0:0:0:0:0:ffff:2599:515b
37.153.81.92 0:0:0:0:0:ffff:2599:515c
37.153.81.93 0:0:0:0:0:ffff:2599:515d
37.153.81.94 0:0:0:0:0:ffff:2599:515e
37.153.81.95 0:0:0:0:0:ffff:2599:515f
37.153.81.96 0:0:0:0:0:ffff:2599:5160
37.153.81.97 0:0:0:0:0:ffff:2599:5161
37.153.81.98 0:0:0:0:0:ffff:2599:5162
37.153.81.99 0:0:0:0:0:ffff:2599:5163
37.153.81.100 0:0:0:0:0:ffff:2599:5164
37.153.81.101 0:0:0:0:0:ffff:2599:5165
37.153.81.102 0:0:0:0:0:ffff:2599:5166
37.153.81.103 0:0:0:0:0:ffff:2599:5167
37.153.81.104 0:0:0:0:0:ffff:2599:5168
37.153.81.105 0:0:0:0:0:ffff:2599:5169
37.153.81.106 0:0:0:0:0:ffff:2599:516a
37.153.81.107 0:0:0:0:0:ffff:2599:516b
37.153.81.108 0:0:0:0:0:ffff:2599:516c
37.153.81.109 0:0:0:0:0:ffff:2599:516d
37.153.81.110 0:0:0:0:0:ffff:2599:516e
37.153.81.111 0:0:0:0:0:ffff:2599:516f
37.153.81.112 0:0:0:0:0:ffff:2599:5170
37.153.81.113 0:0:0:0:0:ffff:2599:5171
37.153.81.114 0:0:0:0:0:ffff:2599:5172
37.153.81.115 0:0:0:0:0:ffff:2599:5173
37.153.81.116 0:0:0:0:0:ffff:2599:5174
37.153.81.117 0:0:0:0:0:ffff:2599:5175
37.153.81.118 0:0:0:0:0:ffff:2599:5176
37.153.81.119 0:0:0:0:0:ffff:2599:5177
37.153.81.120 0:0:0:0:0:ffff:2599:5178


37.153.81.121 0:0:0:0:0:ffff:2599:5179
37.153.81.122 0:0:0:0:0:ffff:2599:517a
37.153.81.123 0:0:0:0:0:ffff:2599:517b
37.153.81.124 0:0:0:0:0:ffff:2599:517c
37.153.81.125 0:0:0:0:0:ffff:2599:517d
37.153.81.126 0:0:0:0:0:ffff:2599:517e
37.153.81.127 0:0:0:0:0:ffff:2599:517f
37.153.81.128 0:0:0:0:0:ffff:2599:5180
37.153.81.129 0:0:0:0:0:ffff:2599:5181
37.153.81.130 0:0:0:0:0:ffff:2599:5182
37.153.81.131 0:0:0:0:0:ffff:2599:5183
37.153.81.132 0:0:0:0:0:ffff:2599:5184
37.153.81.133 0:0:0:0:0:ffff:2599:5185
37.153.81.134 0:0:0:0:0:ffff:2599:5186
37.153.81.135 0:0:0:0:0:ffff:2599:5187
37.153.81.136 0:0:0:0:0:ffff:2599:5188
37.153.81.137 0:0:0:0:0:ffff:2599:5189
37.153.81.138 0:0:0:0:0:ffff:2599:518a
37.153.81.139 0:0:0:0:0:ffff:2599:518b
37.153.81.140 0:0:0:0:0:ffff:2599:518c
37.153.81.141 0:0:0:0:0:ffff:2599:518d
37.153.81.142 0:0:0:0:0:ffff:2599:518e
37.153.81.143 0:0:0:0:0:ffff:2599:518f
37.153.81.144 0:0:0:0:0:ffff:2599:5190
37.153.81.145 0:0:0:0:0:ffff:2599:5191
37.153.81.146 0:0:0:0:0:ffff:2599:5192
37.153.81.147 0:0:0:0:0:ffff:2599:5193
37.153.81.148 0:0:0:0:0:ffff:2599:5194
37.153.81.149 0:0:0:0:0:ffff:2599:5195
37.153.81.150 0:0:0:0:0:ffff:2599:5196
37.153.81.151 0:0:0:0:0:ffff:2599:5197
37.153.81.152 0:0:0:0:0:ffff:2599:5198
37.153.81.153 0:0:0:0:0:ffff:2599:5199
37.153.81.154 0:0:0:0:0:ffff:2599:519a
37.153.81.155 0:0:0:0:0:ffff:2599:519b
37.153.81.156 0:0:0:0:0:ffff:2599:519c
37.153.81.157 0:0:0:0:0:ffff:2599:519d
37.153.81.158 0:0:0:0:0:ffff:2599:519e
37.153.81.159 0:0:0:0:0:ffff:2599:519f
37.153.81.160 0:0:0:0:0:ffff:2599:51a0
37.153.81.161 0:0:0:0:0:ffff:2599:51a1
37.153.81.162 0:0:0:0:0:ffff:2599:51a2
37.153.81.163 0:0:0:0:0:ffff:2599:51a3
37.153.81.164 0:0:0:0:0:ffff:2599:51a4
37.153.81.165 0:0:0:0:0:ffff:2599:51a5
37.153.81.166 0:0:0:0:0:ffff:2599:51a6
37.153.81.167 0:0:0:0:0:ffff:2599:51a7
37.153.81.168 0:0:0:0:0:ffff:2599:51a8
37.153.81.169 0:0:0:0:0:ffff:2599:51a9
37.153.81.170 0:0:0:0:0:ffff:2599:51aa
37.153.81.171 0:0:0:0:0:ffff:2599:51ab
37.153.81.172 0:0:0:0:0:ffff:2599:51ac
37.153.81.173 0:0:0:0:0:ffff:2599:51ad
37.153.81.174 0:0:0:0:0:ffff:2599:51ae
37.153.81.175 0:0:0:0:0:ffff:2599:51af
37.153.81.176 0:0:0:0:0:ffff:2599:51b0
37.153.81.177 0:0:0:0:0:ffff:2599:51b1
37.153.81.178 0:0:0:0:0:ffff:2599:51b2
37.153.81.179 0:0:0:0:0:ffff:2599:51b3
37.153.81.180 0:0:0:0:0:ffff:2599:51b4


37.153.81.181 0:0:0:0:0:ffff:2599:51b5
37.153.81.182 0:0:0:0:0:ffff:2599:51b6
37.153.81.183 0:0:0:0:0:ffff:2599:51b7
37.153.81.184 0:0:0:0:0:ffff:2599:51b8
37.153.81.185 0:0:0:0:0:ffff:2599:51b9
37.153.81.186 0:0:0:0:0:ffff:2599:51ba
37.153.81.187 0:0:0:0:0:ffff:2599:51bb
37.153.81.188 0:0:0:0:0:ffff:2599:51bc
37.153.81.189 0:0:0:0:0:ffff:2599:51bd
37.153.81.190 0:0:0:0:0:ffff:2599:51be
37.153.81.191 0:0:0:0:0:ffff:2599:51bf
37.153.81.192 0:0:0:0:0:ffff:2599:51c0
37.153.81.193 0:0:0:0:0:ffff:2599:51c1
37.153.81.194 0:0:0:0:0:ffff:2599:51c2
37.153.81.195 0:0:0:0:0:ffff:2599:51c3
37.153.81.196 0:0:0:0:0:ffff:2599:51c4
37.153.81.197 0:0:0:0:0:ffff:2599:51c5
37.153.81.198 0:0:0:0:0:ffff:2599:51c6
37.153.81.199 0:0:0:0:0:ffff:2599:51c7
37.153.81.200 0:0:0:0:0:ffff:2599:51c8
37.153.81.201 0:0:0:0:0:ffff:2599:51c9
37.153.81.202 0:0:0:0:0:ffff:2599:51ca
37.153.81.203 0:0:0:0:0:ffff:2599:51cb
37.153.81.204 0:0:0:0:0:ffff:2599:51cc
37.153.81.205 0:0:0:0:0:ffff:2599:51cd
37.153.81.206 0:0:0:0:0:ffff:2599:51ce
37.153.81.207 0:0:0:0:0:ffff:2599:51cf
37.153.81.208 0:0:0:0:0:ffff:2599:51d0
37.153.81.209 0:0:0:0:0:ffff:2599:51d1
37.153.81.210 0:0:0:0:0:ffff:2599:51d2
37.153.81.211 0:0:0:0:0:ffff:2599:51d3
37.153.81.212 0:0:0:0:0:ffff:2599:51d4
37.153.81.213 0:0:0:0:0:ffff:2599:51d5
37.153.81.214 0:0:0:0:0:ffff:2599:51d6
37.153.81.215 0:0:0:0:0:ffff:2599:51d7
37.153.81.216 0:0:0:0:0:ffff:2599:51d8
37.153.81.217 0:0:0:0:0:ffff:2599:51d9
37.153.81.218 0:0:0:0:0:ffff:2599:51da
37.153.81.219 0:0:0:0:0:ffff:2599:51db
37.153.81.220 0:0:0:0:0:ffff:2599:51dc
37.153.81.221 0:0:0:0:0:ffff:2599:51dd
37.153.81.222 0:0:0:0:0:ffff:2599:51de
37.153.81.223 0:0:0:0:0:ffff:2599:51df
37.153.81.224 0:0:0:0:0:ffff:2599:51e0
37.153.81.225 0:0:0:0:0:ffff:2599:51e1
37.153.81.226 0:0:0:0:0:ffff:2599:51e2
37.153.81.227 0:0:0:0:0:ffff:2599:51e3
37.153.81.228 0:0:0:0:0:ffff:2599:51e4
37.153.81.229 0:0:0:0:0:ffff:2599:51e5
37.153.81.230 0:0:0:0:0:ffff:2599:51e6
37.153.81.231 0:0:0:0:0:ffff:2599:51e7
37.153.81.232 0:0:0:0:0:ffff:2599:51e8
37.153.81.233 0:0:0:0:0:ffff:2599:51e9
37.153.81.234 0:0:0:0:0:ffff:2599:51ea
37.153.81.235 0:0:0:0:0:ffff:2599:51eb
37.153.81.236 0:0:0:0:0:ffff:2599:51ec
37.153.81.237 0:0:0:0:0:ffff:2599:51ed
37.153.81.238 0:0:0:0:0:ffff:2599:51ee
37.153.81.239 0:0:0:0:0:ffff:2599:51ef
37.153.81.240 0:0:0:0:0:ffff:2599:51f0
37.153.81.241 0:0:0:0:0:ffff:2599:51f1
37.153.81.242 0:0:0:0:0:ffff:2599:51f2
37.153.81.243 0:0:0:0:0:ffff:2599:51f3
37.153.81.244 0:0:0:0:0:ffff:2599:51f4
37.153.81.245 0:0:0:0:0:ffff:2599:51f5
37.153.81.246 0:0:0:0:0:ffff:2599:51f6
37.153.81.247 0:0:0:0:0:ffff:2599:51f7
37.153.81.248 0:0:0:0:0:ffff:2599:51f8
37.153.81.249 0:0:0:0:0:ffff:2599:51f9
37.153.81.250 0:0:0:0:0:ffff:2599:51fa
37.153.81.251 0:0:0:0:0:ffff:2599:51fb
37.153.81.252 0:0:0:0:0:ffff:2599:51fc
37.153.81.253 0:0:0:0:0:ffff:2599:51fd
37.153.81.254 0:0:0:0:0:ffff:2599:51fe
37.153.81.255 0:0:0:0:0:ffff:2599:51ff


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.