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
21.59.81.1 0:0:0:0:0:ffff:153b:5101
21.59.81.2 0:0:0:0:0:ffff:153b:5102
21.59.81.3 0:0:0:0:0:ffff:153b:5103
21.59.81.4 0:0:0:0:0:ffff:153b:5104
21.59.81.5 0:0:0:0:0:ffff:153b:5105
21.59.81.6 0:0:0:0:0:ffff:153b:5106
21.59.81.7 0:0:0:0:0:ffff:153b:5107
21.59.81.8 0:0:0:0:0:ffff:153b:5108
21.59.81.9 0:0:0:0:0:ffff:153b:5109
21.59.81.10 0:0:0:0:0:ffff:153b:510a
21.59.81.11 0:0:0:0:0:ffff:153b:510b
21.59.81.12 0:0:0:0:0:ffff:153b:510c
21.59.81.13 0:0:0:0:0:ffff:153b:510d
21.59.81.14 0:0:0:0:0:ffff:153b:510e
21.59.81.15 0:0:0:0:0:ffff:153b:510f
21.59.81.16 0:0:0:0:0:ffff:153b:5110
21.59.81.17 0:0:0:0:0:ffff:153b:5111
21.59.81.18 0:0:0:0:0:ffff:153b:5112
21.59.81.19 0:0:0:0:0:ffff:153b:5113
21.59.81.20 0:0:0:0:0:ffff:153b:5114
21.59.81.21 0:0:0:0:0:ffff:153b:5115
21.59.81.22 0:0:0:0:0:ffff:153b:5116
21.59.81.23 0:0:0:0:0:ffff:153b:5117
21.59.81.24 0:0:0:0:0:ffff:153b:5118
21.59.81.25 0:0:0:0:0:ffff:153b:5119
21.59.81.26 0:0:0:0:0:ffff:153b:511a
21.59.81.27 0:0:0:0:0:ffff:153b:511b
21.59.81.28 0:0:0:0:0:ffff:153b:511c
21.59.81.29 0:0:0:0:0:ffff:153b:511d
21.59.81.30 0:0:0:0:0:ffff:153b:511e
21.59.81.31 0:0:0:0:0:ffff:153b:511f
21.59.81.32 0:0:0:0:0:ffff:153b:5120
21.59.81.33 0:0:0:0:0:ffff:153b:5121
21.59.81.34 0:0:0:0:0:ffff:153b:5122
21.59.81.35 0:0:0:0:0:ffff:153b:5123
21.59.81.36 0:0:0:0:0:ffff:153b:5124
21.59.81.37 0:0:0:0:0:ffff:153b:5125
21.59.81.38 0:0:0:0:0:ffff:153b:5126
21.59.81.39 0:0:0:0:0:ffff:153b:5127
21.59.81.40 0:0:0:0:0:ffff:153b:5128
21.59.81.41 0:0:0:0:0:ffff:153b:5129
21.59.81.42 0:0:0:0:0:ffff:153b:512a
21.59.81.43 0:0:0:0:0:ffff:153b:512b
21.59.81.44 0:0:0:0:0:ffff:153b:512c
21.59.81.45 0:0:0:0:0:ffff:153b:512d
21.59.81.46 0:0:0:0:0:ffff:153b:512e
21.59.81.47 0:0:0:0:0:ffff:153b:512f
21.59.81.48 0:0:0:0:0:ffff:153b:5130
21.59.81.49 0:0:0:0:0:ffff:153b:5131
21.59.81.50 0:0:0:0:0:ffff:153b:5132
21.59.81.51 0:0:0:0:0:ffff:153b:5133
21.59.81.52 0:0:0:0:0:ffff:153b:5134
21.59.81.53 0:0:0:0:0:ffff:153b:5135
21.59.81.54 0:0:0:0:0:ffff:153b:5136
21.59.81.55 0:0:0:0:0:ffff:153b:5137
21.59.81.56 0:0:0:0:0:ffff:153b:5138
21.59.81.57 0:0:0:0:0:ffff:153b:5139
21.59.81.58 0:0:0:0:0:ffff:153b:513a
21.59.81.59 0:0:0:0:0:ffff:153b:513b
21.59.81.60 0:0:0:0:0:ffff:153b:513c


21.59.81.61 0:0:0:0:0:ffff:153b:513d
21.59.81.62 0:0:0:0:0:ffff:153b:513e
21.59.81.63 0:0:0:0:0:ffff:153b:513f
21.59.81.64 0:0:0:0:0:ffff:153b:5140
21.59.81.65 0:0:0:0:0:ffff:153b:5141
21.59.81.66 0:0:0:0:0:ffff:153b:5142
21.59.81.67 0:0:0:0:0:ffff:153b:5143
21.59.81.68 0:0:0:0:0:ffff:153b:5144
21.59.81.69 0:0:0:0:0:ffff:153b:5145
21.59.81.70 0:0:0:0:0:ffff:153b:5146
21.59.81.71 0:0:0:0:0:ffff:153b:5147
21.59.81.72 0:0:0:0:0:ffff:153b:5148
21.59.81.73 0:0:0:0:0:ffff:153b:5149
21.59.81.74 0:0:0:0:0:ffff:153b:514a
21.59.81.75 0:0:0:0:0:ffff:153b:514b
21.59.81.76 0:0:0:0:0:ffff:153b:514c
21.59.81.77 0:0:0:0:0:ffff:153b:514d
21.59.81.78 0:0:0:0:0:ffff:153b:514e
21.59.81.79 0:0:0:0:0:ffff:153b:514f
21.59.81.80 0:0:0:0:0:ffff:153b:5150
21.59.81.81 0:0:0:0:0:ffff:153b:5151
21.59.81.82 0:0:0:0:0:ffff:153b:5152
21.59.81.83 0:0:0:0:0:ffff:153b:5153
21.59.81.84 0:0:0:0:0:ffff:153b:5154
21.59.81.85 0:0:0:0:0:ffff:153b:5155
21.59.81.86 0:0:0:0:0:ffff:153b:5156
21.59.81.87 0:0:0:0:0:ffff:153b:5157
21.59.81.88 0:0:0:0:0:ffff:153b:5158
21.59.81.89 0:0:0:0:0:ffff:153b:5159
21.59.81.90 0:0:0:0:0:ffff:153b:515a
21.59.81.91 0:0:0:0:0:ffff:153b:515b
21.59.81.92 0:0:0:0:0:ffff:153b:515c
21.59.81.93 0:0:0:0:0:ffff:153b:515d
21.59.81.94 0:0:0:0:0:ffff:153b:515e
21.59.81.95 0:0:0:0:0:ffff:153b:515f
21.59.81.96 0:0:0:0:0:ffff:153b:5160
21.59.81.97 0:0:0:0:0:ffff:153b:5161
21.59.81.98 0:0:0:0:0:ffff:153b:5162
21.59.81.99 0:0:0:0:0:ffff:153b:5163
21.59.81.100 0:0:0:0:0:ffff:153b:5164
21.59.81.101 0:0:0:0:0:ffff:153b:5165
21.59.81.102 0:0:0:0:0:ffff:153b:5166
21.59.81.103 0:0:0:0:0:ffff:153b:5167
21.59.81.104 0:0:0:0:0:ffff:153b:5168
21.59.81.105 0:0:0:0:0:ffff:153b:5169
21.59.81.106 0:0:0:0:0:ffff:153b:516a
21.59.81.107 0:0:0:0:0:ffff:153b:516b
21.59.81.108 0:0:0:0:0:ffff:153b:516c
21.59.81.109 0:0:0:0:0:ffff:153b:516d
21.59.81.110 0:0:0:0:0:ffff:153b:516e
21.59.81.111 0:0:0:0:0:ffff:153b:516f
21.59.81.112 0:0:0:0:0:ffff:153b:5170
21.59.81.113 0:0:0:0:0:ffff:153b:5171
21.59.81.114 0:0:0:0:0:ffff:153b:5172
21.59.81.115 0:0:0:0:0:ffff:153b:5173
21.59.81.116 0:0:0:0:0:ffff:153b:5174
21.59.81.117 0:0:0:0:0:ffff:153b:5175
21.59.81.118 0:0:0:0:0:ffff:153b:5176
21.59.81.119 0:0:0:0:0:ffff:153b:5177
21.59.81.120 0:0:0:0:0:ffff:153b:5178


21.59.81.121 0:0:0:0:0:ffff:153b:5179
21.59.81.122 0:0:0:0:0:ffff:153b:517a
21.59.81.123 0:0:0:0:0:ffff:153b:517b
21.59.81.124 0:0:0:0:0:ffff:153b:517c
21.59.81.125 0:0:0:0:0:ffff:153b:517d
21.59.81.126 0:0:0:0:0:ffff:153b:517e
21.59.81.127 0:0:0:0:0:ffff:153b:517f
21.59.81.128 0:0:0:0:0:ffff:153b:5180
21.59.81.129 0:0:0:0:0:ffff:153b:5181
21.59.81.130 0:0:0:0:0:ffff:153b:5182
21.59.81.131 0:0:0:0:0:ffff:153b:5183
21.59.81.132 0:0:0:0:0:ffff:153b:5184
21.59.81.133 0:0:0:0:0:ffff:153b:5185
21.59.81.134 0:0:0:0:0:ffff:153b:5186
21.59.81.135 0:0:0:0:0:ffff:153b:5187
21.59.81.136 0:0:0:0:0:ffff:153b:5188
21.59.81.137 0:0:0:0:0:ffff:153b:5189
21.59.81.138 0:0:0:0:0:ffff:153b:518a
21.59.81.139 0:0:0:0:0:ffff:153b:518b
21.59.81.140 0:0:0:0:0:ffff:153b:518c
21.59.81.141 0:0:0:0:0:ffff:153b:518d
21.59.81.142 0:0:0:0:0:ffff:153b:518e
21.59.81.143 0:0:0:0:0:ffff:153b:518f
21.59.81.144 0:0:0:0:0:ffff:153b:5190
21.59.81.145 0:0:0:0:0:ffff:153b:5191
21.59.81.146 0:0:0:0:0:ffff:153b:5192
21.59.81.147 0:0:0:0:0:ffff:153b:5193
21.59.81.148 0:0:0:0:0:ffff:153b:5194
21.59.81.149 0:0:0:0:0:ffff:153b:5195
21.59.81.150 0:0:0:0:0:ffff:153b:5196
21.59.81.151 0:0:0:0:0:ffff:153b:5197
21.59.81.152 0:0:0:0:0:ffff:153b:5198
21.59.81.153 0:0:0:0:0:ffff:153b:5199
21.59.81.154 0:0:0:0:0:ffff:153b:519a
21.59.81.155 0:0:0:0:0:ffff:153b:519b
21.59.81.156 0:0:0:0:0:ffff:153b:519c
21.59.81.157 0:0:0:0:0:ffff:153b:519d
21.59.81.158 0:0:0:0:0:ffff:153b:519e
21.59.81.159 0:0:0:0:0:ffff:153b:519f
21.59.81.160 0:0:0:0:0:ffff:153b:51a0
21.59.81.161 0:0:0:0:0:ffff:153b:51a1
21.59.81.162 0:0:0:0:0:ffff:153b:51a2
21.59.81.163 0:0:0:0:0:ffff:153b:51a3
21.59.81.164 0:0:0:0:0:ffff:153b:51a4
21.59.81.165 0:0:0:0:0:ffff:153b:51a5
21.59.81.166 0:0:0:0:0:ffff:153b:51a6
21.59.81.167 0:0:0:0:0:ffff:153b:51a7
21.59.81.168 0:0:0:0:0:ffff:153b:51a8
21.59.81.169 0:0:0:0:0:ffff:153b:51a9
21.59.81.170 0:0:0:0:0:ffff:153b:51aa
21.59.81.171 0:0:0:0:0:ffff:153b:51ab
21.59.81.172 0:0:0:0:0:ffff:153b:51ac
21.59.81.173 0:0:0:0:0:ffff:153b:51ad
21.59.81.174 0:0:0:0:0:ffff:153b:51ae
21.59.81.175 0:0:0:0:0:ffff:153b:51af
21.59.81.176 0:0:0:0:0:ffff:153b:51b0
21.59.81.177 0:0:0:0:0:ffff:153b:51b1
21.59.81.178 0:0:0:0:0:ffff:153b:51b2
21.59.81.179 0:0:0:0:0:ffff:153b:51b3
21.59.81.180 0:0:0:0:0:ffff:153b:51b4


21.59.81.181 0:0:0:0:0:ffff:153b:51b5
21.59.81.182 0:0:0:0:0:ffff:153b:51b6
21.59.81.183 0:0:0:0:0:ffff:153b:51b7
21.59.81.184 0:0:0:0:0:ffff:153b:51b8
21.59.81.185 0:0:0:0:0:ffff:153b:51b9
21.59.81.186 0:0:0:0:0:ffff:153b:51ba
21.59.81.187 0:0:0:0:0:ffff:153b:51bb
21.59.81.188 0:0:0:0:0:ffff:153b:51bc
21.59.81.189 0:0:0:0:0:ffff:153b:51bd
21.59.81.190 0:0:0:0:0:ffff:153b:51be
21.59.81.191 0:0:0:0:0:ffff:153b:51bf
21.59.81.192 0:0:0:0:0:ffff:153b:51c0
21.59.81.193 0:0:0:0:0:ffff:153b:51c1
21.59.81.194 0:0:0:0:0:ffff:153b:51c2
21.59.81.195 0:0:0:0:0:ffff:153b:51c3
21.59.81.196 0:0:0:0:0:ffff:153b:51c4
21.59.81.197 0:0:0:0:0:ffff:153b:51c5
21.59.81.198 0:0:0:0:0:ffff:153b:51c6
21.59.81.199 0:0:0:0:0:ffff:153b:51c7
21.59.81.200 0:0:0:0:0:ffff:153b:51c8
21.59.81.201 0:0:0:0:0:ffff:153b:51c9
21.59.81.202 0:0:0:0:0:ffff:153b:51ca
21.59.81.203 0:0:0:0:0:ffff:153b:51cb
21.59.81.204 0:0:0:0:0:ffff:153b:51cc
21.59.81.205 0:0:0:0:0:ffff:153b:51cd
21.59.81.206 0:0:0:0:0:ffff:153b:51ce
21.59.81.207 0:0:0:0:0:ffff:153b:51cf
21.59.81.208 0:0:0:0:0:ffff:153b:51d0
21.59.81.209 0:0:0:0:0:ffff:153b:51d1
21.59.81.210 0:0:0:0:0:ffff:153b:51d2
21.59.81.211 0:0:0:0:0:ffff:153b:51d3
21.59.81.212 0:0:0:0:0:ffff:153b:51d4
21.59.81.213 0:0:0:0:0:ffff:153b:51d5
21.59.81.214 0:0:0:0:0:ffff:153b:51d6
21.59.81.215 0:0:0:0:0:ffff:153b:51d7
21.59.81.216 0:0:0:0:0:ffff:153b:51d8
21.59.81.217 0:0:0:0:0:ffff:153b:51d9
21.59.81.218 0:0:0:0:0:ffff:153b:51da
21.59.81.219 0:0:0:0:0:ffff:153b:51db
21.59.81.220 0:0:0:0:0:ffff:153b:51dc
21.59.81.221 0:0:0:0:0:ffff:153b:51dd
21.59.81.222 0:0:0:0:0:ffff:153b:51de
21.59.81.223 0:0:0:0:0:ffff:153b:51df
21.59.81.224 0:0:0:0:0:ffff:153b:51e0
21.59.81.225 0:0:0:0:0:ffff:153b:51e1
21.59.81.226 0:0:0:0:0:ffff:153b:51e2
21.59.81.227 0:0:0:0:0:ffff:153b:51e3
21.59.81.228 0:0:0:0:0:ffff:153b:51e4
21.59.81.229 0:0:0:0:0:ffff:153b:51e5
21.59.81.230 0:0:0:0:0:ffff:153b:51e6
21.59.81.231 0:0:0:0:0:ffff:153b:51e7
21.59.81.232 0:0:0:0:0:ffff:153b:51e8
21.59.81.233 0:0:0:0:0:ffff:153b:51e9
21.59.81.234 0:0:0:0:0:ffff:153b:51ea
21.59.81.235 0:0:0:0:0:ffff:153b:51eb
21.59.81.236 0:0:0:0:0:ffff:153b:51ec
21.59.81.237 0:0:0:0:0:ffff:153b:51ed
21.59.81.238 0:0:0:0:0:ffff:153b:51ee
21.59.81.239 0:0:0:0:0:ffff:153b:51ef
21.59.81.240 0:0:0:0:0:ffff:153b:51f0
21.59.81.241 0:0:0:0:0:ffff:153b:51f1
21.59.81.242 0:0:0:0:0:ffff:153b:51f2
21.59.81.243 0:0:0:0:0:ffff:153b:51f3
21.59.81.244 0:0:0:0:0:ffff:153b:51f4
21.59.81.245 0:0:0:0:0:ffff:153b:51f5
21.59.81.246 0:0:0:0:0:ffff:153b:51f6
21.59.81.247 0:0:0:0:0:ffff:153b:51f7
21.59.81.248 0:0:0:0:0:ffff:153b:51f8
21.59.81.249 0:0:0:0:0:ffff:153b:51f9
21.59.81.250 0:0:0:0:0:ffff:153b:51fa
21.59.81.251 0:0:0:0:0:ffff:153b:51fb
21.59.81.252 0:0:0:0:0:ffff:153b:51fc
21.59.81.253 0:0:0:0:0:ffff:153b:51fd
21.59.81.254 0:0:0:0:0:ffff:153b:51fe
21.59.81.255 0:0:0:0:0:ffff:153b: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.