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
78.123.81.1 0:0:0:0:0:ffff:4e7b:5101
78.123.81.2 0:0:0:0:0:ffff:4e7b:5102
78.123.81.3 0:0:0:0:0:ffff:4e7b:5103
78.123.81.4 0:0:0:0:0:ffff:4e7b:5104
78.123.81.5 0:0:0:0:0:ffff:4e7b:5105
78.123.81.6 0:0:0:0:0:ffff:4e7b:5106
78.123.81.7 0:0:0:0:0:ffff:4e7b:5107
78.123.81.8 0:0:0:0:0:ffff:4e7b:5108
78.123.81.9 0:0:0:0:0:ffff:4e7b:5109
78.123.81.10 0:0:0:0:0:ffff:4e7b:510a
78.123.81.11 0:0:0:0:0:ffff:4e7b:510b
78.123.81.12 0:0:0:0:0:ffff:4e7b:510c
78.123.81.13 0:0:0:0:0:ffff:4e7b:510d
78.123.81.14 0:0:0:0:0:ffff:4e7b:510e
78.123.81.15 0:0:0:0:0:ffff:4e7b:510f
78.123.81.16 0:0:0:0:0:ffff:4e7b:5110
78.123.81.17 0:0:0:0:0:ffff:4e7b:5111
78.123.81.18 0:0:0:0:0:ffff:4e7b:5112
78.123.81.19 0:0:0:0:0:ffff:4e7b:5113
78.123.81.20 0:0:0:0:0:ffff:4e7b:5114
78.123.81.21 0:0:0:0:0:ffff:4e7b:5115
78.123.81.22 0:0:0:0:0:ffff:4e7b:5116
78.123.81.23 0:0:0:0:0:ffff:4e7b:5117
78.123.81.24 0:0:0:0:0:ffff:4e7b:5118
78.123.81.25 0:0:0:0:0:ffff:4e7b:5119
78.123.81.26 0:0:0:0:0:ffff:4e7b:511a
78.123.81.27 0:0:0:0:0:ffff:4e7b:511b
78.123.81.28 0:0:0:0:0:ffff:4e7b:511c
78.123.81.29 0:0:0:0:0:ffff:4e7b:511d
78.123.81.30 0:0:0:0:0:ffff:4e7b:511e
78.123.81.31 0:0:0:0:0:ffff:4e7b:511f
78.123.81.32 0:0:0:0:0:ffff:4e7b:5120
78.123.81.33 0:0:0:0:0:ffff:4e7b:5121
78.123.81.34 0:0:0:0:0:ffff:4e7b:5122
78.123.81.35 0:0:0:0:0:ffff:4e7b:5123
78.123.81.36 0:0:0:0:0:ffff:4e7b:5124
78.123.81.37 0:0:0:0:0:ffff:4e7b:5125
78.123.81.38 0:0:0:0:0:ffff:4e7b:5126
78.123.81.39 0:0:0:0:0:ffff:4e7b:5127
78.123.81.40 0:0:0:0:0:ffff:4e7b:5128
78.123.81.41 0:0:0:0:0:ffff:4e7b:5129
78.123.81.42 0:0:0:0:0:ffff:4e7b:512a
78.123.81.43 0:0:0:0:0:ffff:4e7b:512b
78.123.81.44 0:0:0:0:0:ffff:4e7b:512c
78.123.81.45 0:0:0:0:0:ffff:4e7b:512d
78.123.81.46 0:0:0:0:0:ffff:4e7b:512e
78.123.81.47 0:0:0:0:0:ffff:4e7b:512f
78.123.81.48 0:0:0:0:0:ffff:4e7b:5130
78.123.81.49 0:0:0:0:0:ffff:4e7b:5131
78.123.81.50 0:0:0:0:0:ffff:4e7b:5132
78.123.81.51 0:0:0:0:0:ffff:4e7b:5133
78.123.81.52 0:0:0:0:0:ffff:4e7b:5134
78.123.81.53 0:0:0:0:0:ffff:4e7b:5135
78.123.81.54 0:0:0:0:0:ffff:4e7b:5136
78.123.81.55 0:0:0:0:0:ffff:4e7b:5137
78.123.81.56 0:0:0:0:0:ffff:4e7b:5138
78.123.81.57 0:0:0:0:0:ffff:4e7b:5139
78.123.81.58 0:0:0:0:0:ffff:4e7b:513a
78.123.81.59 0:0:0:0:0:ffff:4e7b:513b
78.123.81.60 0:0:0:0:0:ffff:4e7b:513c


78.123.81.61 0:0:0:0:0:ffff:4e7b:513d
78.123.81.62 0:0:0:0:0:ffff:4e7b:513e
78.123.81.63 0:0:0:0:0:ffff:4e7b:513f
78.123.81.64 0:0:0:0:0:ffff:4e7b:5140
78.123.81.65 0:0:0:0:0:ffff:4e7b:5141
78.123.81.66 0:0:0:0:0:ffff:4e7b:5142
78.123.81.67 0:0:0:0:0:ffff:4e7b:5143
78.123.81.68 0:0:0:0:0:ffff:4e7b:5144
78.123.81.69 0:0:0:0:0:ffff:4e7b:5145
78.123.81.70 0:0:0:0:0:ffff:4e7b:5146
78.123.81.71 0:0:0:0:0:ffff:4e7b:5147
78.123.81.72 0:0:0:0:0:ffff:4e7b:5148
78.123.81.73 0:0:0:0:0:ffff:4e7b:5149
78.123.81.74 0:0:0:0:0:ffff:4e7b:514a
78.123.81.75 0:0:0:0:0:ffff:4e7b:514b
78.123.81.76 0:0:0:0:0:ffff:4e7b:514c
78.123.81.77 0:0:0:0:0:ffff:4e7b:514d
78.123.81.78 0:0:0:0:0:ffff:4e7b:514e
78.123.81.79 0:0:0:0:0:ffff:4e7b:514f
78.123.81.80 0:0:0:0:0:ffff:4e7b:5150
78.123.81.81 0:0:0:0:0:ffff:4e7b:5151
78.123.81.82 0:0:0:0:0:ffff:4e7b:5152
78.123.81.83 0:0:0:0:0:ffff:4e7b:5153
78.123.81.84 0:0:0:0:0:ffff:4e7b:5154
78.123.81.85 0:0:0:0:0:ffff:4e7b:5155
78.123.81.86 0:0:0:0:0:ffff:4e7b:5156
78.123.81.87 0:0:0:0:0:ffff:4e7b:5157
78.123.81.88 0:0:0:0:0:ffff:4e7b:5158
78.123.81.89 0:0:0:0:0:ffff:4e7b:5159
78.123.81.90 0:0:0:0:0:ffff:4e7b:515a
78.123.81.91 0:0:0:0:0:ffff:4e7b:515b
78.123.81.92 0:0:0:0:0:ffff:4e7b:515c
78.123.81.93 0:0:0:0:0:ffff:4e7b:515d
78.123.81.94 0:0:0:0:0:ffff:4e7b:515e
78.123.81.95 0:0:0:0:0:ffff:4e7b:515f
78.123.81.96 0:0:0:0:0:ffff:4e7b:5160
78.123.81.97 0:0:0:0:0:ffff:4e7b:5161
78.123.81.98 0:0:0:0:0:ffff:4e7b:5162
78.123.81.99 0:0:0:0:0:ffff:4e7b:5163
78.123.81.100 0:0:0:0:0:ffff:4e7b:5164
78.123.81.101 0:0:0:0:0:ffff:4e7b:5165
78.123.81.102 0:0:0:0:0:ffff:4e7b:5166
78.123.81.103 0:0:0:0:0:ffff:4e7b:5167
78.123.81.104 0:0:0:0:0:ffff:4e7b:5168
78.123.81.105 0:0:0:0:0:ffff:4e7b:5169
78.123.81.106 0:0:0:0:0:ffff:4e7b:516a
78.123.81.107 0:0:0:0:0:ffff:4e7b:516b
78.123.81.108 0:0:0:0:0:ffff:4e7b:516c
78.123.81.109 0:0:0:0:0:ffff:4e7b:516d
78.123.81.110 0:0:0:0:0:ffff:4e7b:516e
78.123.81.111 0:0:0:0:0:ffff:4e7b:516f
78.123.81.112 0:0:0:0:0:ffff:4e7b:5170
78.123.81.113 0:0:0:0:0:ffff:4e7b:5171
78.123.81.114 0:0:0:0:0:ffff:4e7b:5172
78.123.81.115 0:0:0:0:0:ffff:4e7b:5173
78.123.81.116 0:0:0:0:0:ffff:4e7b:5174
78.123.81.117 0:0:0:0:0:ffff:4e7b:5175
78.123.81.118 0:0:0:0:0:ffff:4e7b:5176
78.123.81.119 0:0:0:0:0:ffff:4e7b:5177
78.123.81.120 0:0:0:0:0:ffff:4e7b:5178


78.123.81.121 0:0:0:0:0:ffff:4e7b:5179
78.123.81.122 0:0:0:0:0:ffff:4e7b:517a
78.123.81.123 0:0:0:0:0:ffff:4e7b:517b
78.123.81.124 0:0:0:0:0:ffff:4e7b:517c
78.123.81.125 0:0:0:0:0:ffff:4e7b:517d
78.123.81.126 0:0:0:0:0:ffff:4e7b:517e
78.123.81.127 0:0:0:0:0:ffff:4e7b:517f
78.123.81.128 0:0:0:0:0:ffff:4e7b:5180
78.123.81.129 0:0:0:0:0:ffff:4e7b:5181
78.123.81.130 0:0:0:0:0:ffff:4e7b:5182
78.123.81.131 0:0:0:0:0:ffff:4e7b:5183
78.123.81.132 0:0:0:0:0:ffff:4e7b:5184
78.123.81.133 0:0:0:0:0:ffff:4e7b:5185
78.123.81.134 0:0:0:0:0:ffff:4e7b:5186
78.123.81.135 0:0:0:0:0:ffff:4e7b:5187
78.123.81.136 0:0:0:0:0:ffff:4e7b:5188
78.123.81.137 0:0:0:0:0:ffff:4e7b:5189
78.123.81.138 0:0:0:0:0:ffff:4e7b:518a
78.123.81.139 0:0:0:0:0:ffff:4e7b:518b
78.123.81.140 0:0:0:0:0:ffff:4e7b:518c
78.123.81.141 0:0:0:0:0:ffff:4e7b:518d
78.123.81.142 0:0:0:0:0:ffff:4e7b:518e
78.123.81.143 0:0:0:0:0:ffff:4e7b:518f
78.123.81.144 0:0:0:0:0:ffff:4e7b:5190
78.123.81.145 0:0:0:0:0:ffff:4e7b:5191
78.123.81.146 0:0:0:0:0:ffff:4e7b:5192
78.123.81.147 0:0:0:0:0:ffff:4e7b:5193
78.123.81.148 0:0:0:0:0:ffff:4e7b:5194
78.123.81.149 0:0:0:0:0:ffff:4e7b:5195
78.123.81.150 0:0:0:0:0:ffff:4e7b:5196
78.123.81.151 0:0:0:0:0:ffff:4e7b:5197
78.123.81.152 0:0:0:0:0:ffff:4e7b:5198
78.123.81.153 0:0:0:0:0:ffff:4e7b:5199
78.123.81.154 0:0:0:0:0:ffff:4e7b:519a
78.123.81.155 0:0:0:0:0:ffff:4e7b:519b
78.123.81.156 0:0:0:0:0:ffff:4e7b:519c
78.123.81.157 0:0:0:0:0:ffff:4e7b:519d
78.123.81.158 0:0:0:0:0:ffff:4e7b:519e
78.123.81.159 0:0:0:0:0:ffff:4e7b:519f
78.123.81.160 0:0:0:0:0:ffff:4e7b:51a0
78.123.81.161 0:0:0:0:0:ffff:4e7b:51a1
78.123.81.162 0:0:0:0:0:ffff:4e7b:51a2
78.123.81.163 0:0:0:0:0:ffff:4e7b:51a3
78.123.81.164 0:0:0:0:0:ffff:4e7b:51a4
78.123.81.165 0:0:0:0:0:ffff:4e7b:51a5
78.123.81.166 0:0:0:0:0:ffff:4e7b:51a6
78.123.81.167 0:0:0:0:0:ffff:4e7b:51a7
78.123.81.168 0:0:0:0:0:ffff:4e7b:51a8
78.123.81.169 0:0:0:0:0:ffff:4e7b:51a9
78.123.81.170 0:0:0:0:0:ffff:4e7b:51aa
78.123.81.171 0:0:0:0:0:ffff:4e7b:51ab
78.123.81.172 0:0:0:0:0:ffff:4e7b:51ac
78.123.81.173 0:0:0:0:0:ffff:4e7b:51ad
78.123.81.174 0:0:0:0:0:ffff:4e7b:51ae
78.123.81.175 0:0:0:0:0:ffff:4e7b:51af
78.123.81.176 0:0:0:0:0:ffff:4e7b:51b0
78.123.81.177 0:0:0:0:0:ffff:4e7b:51b1
78.123.81.178 0:0:0:0:0:ffff:4e7b:51b2
78.123.81.179 0:0:0:0:0:ffff:4e7b:51b3
78.123.81.180 0:0:0:0:0:ffff:4e7b:51b4


78.123.81.181 0:0:0:0:0:ffff:4e7b:51b5
78.123.81.182 0:0:0:0:0:ffff:4e7b:51b6
78.123.81.183 0:0:0:0:0:ffff:4e7b:51b7
78.123.81.184 0:0:0:0:0:ffff:4e7b:51b8
78.123.81.185 0:0:0:0:0:ffff:4e7b:51b9
78.123.81.186 0:0:0:0:0:ffff:4e7b:51ba
78.123.81.187 0:0:0:0:0:ffff:4e7b:51bb
78.123.81.188 0:0:0:0:0:ffff:4e7b:51bc
78.123.81.189 0:0:0:0:0:ffff:4e7b:51bd
78.123.81.190 0:0:0:0:0:ffff:4e7b:51be
78.123.81.191 0:0:0:0:0:ffff:4e7b:51bf
78.123.81.192 0:0:0:0:0:ffff:4e7b:51c0
78.123.81.193 0:0:0:0:0:ffff:4e7b:51c1
78.123.81.194 0:0:0:0:0:ffff:4e7b:51c2
78.123.81.195 0:0:0:0:0:ffff:4e7b:51c3
78.123.81.196 0:0:0:0:0:ffff:4e7b:51c4
78.123.81.197 0:0:0:0:0:ffff:4e7b:51c5
78.123.81.198 0:0:0:0:0:ffff:4e7b:51c6
78.123.81.199 0:0:0:0:0:ffff:4e7b:51c7
78.123.81.200 0:0:0:0:0:ffff:4e7b:51c8
78.123.81.201 0:0:0:0:0:ffff:4e7b:51c9
78.123.81.202 0:0:0:0:0:ffff:4e7b:51ca
78.123.81.203 0:0:0:0:0:ffff:4e7b:51cb
78.123.81.204 0:0:0:0:0:ffff:4e7b:51cc
78.123.81.205 0:0:0:0:0:ffff:4e7b:51cd
78.123.81.206 0:0:0:0:0:ffff:4e7b:51ce
78.123.81.207 0:0:0:0:0:ffff:4e7b:51cf
78.123.81.208 0:0:0:0:0:ffff:4e7b:51d0
78.123.81.209 0:0:0:0:0:ffff:4e7b:51d1
78.123.81.210 0:0:0:0:0:ffff:4e7b:51d2
78.123.81.211 0:0:0:0:0:ffff:4e7b:51d3
78.123.81.212 0:0:0:0:0:ffff:4e7b:51d4
78.123.81.213 0:0:0:0:0:ffff:4e7b:51d5
78.123.81.214 0:0:0:0:0:ffff:4e7b:51d6
78.123.81.215 0:0:0:0:0:ffff:4e7b:51d7
78.123.81.216 0:0:0:0:0:ffff:4e7b:51d8
78.123.81.217 0:0:0:0:0:ffff:4e7b:51d9
78.123.81.218 0:0:0:0:0:ffff:4e7b:51da
78.123.81.219 0:0:0:0:0:ffff:4e7b:51db
78.123.81.220 0:0:0:0:0:ffff:4e7b:51dc
78.123.81.221 0:0:0:0:0:ffff:4e7b:51dd
78.123.81.222 0:0:0:0:0:ffff:4e7b:51de
78.123.81.223 0:0:0:0:0:ffff:4e7b:51df
78.123.81.224 0:0:0:0:0:ffff:4e7b:51e0
78.123.81.225 0:0:0:0:0:ffff:4e7b:51e1
78.123.81.226 0:0:0:0:0:ffff:4e7b:51e2
78.123.81.227 0:0:0:0:0:ffff:4e7b:51e3
78.123.81.228 0:0:0:0:0:ffff:4e7b:51e4
78.123.81.229 0:0:0:0:0:ffff:4e7b:51e5
78.123.81.230 0:0:0:0:0:ffff:4e7b:51e6
78.123.81.231 0:0:0:0:0:ffff:4e7b:51e7
78.123.81.232 0:0:0:0:0:ffff:4e7b:51e8
78.123.81.233 0:0:0:0:0:ffff:4e7b:51e9
78.123.81.234 0:0:0:0:0:ffff:4e7b:51ea
78.123.81.235 0:0:0:0:0:ffff:4e7b:51eb
78.123.81.236 0:0:0:0:0:ffff:4e7b:51ec
78.123.81.237 0:0:0:0:0:ffff:4e7b:51ed
78.123.81.238 0:0:0:0:0:ffff:4e7b:51ee
78.123.81.239 0:0:0:0:0:ffff:4e7b:51ef
78.123.81.240 0:0:0:0:0:ffff:4e7b:51f0
78.123.81.241 0:0:0:0:0:ffff:4e7b:51f1
78.123.81.242 0:0:0:0:0:ffff:4e7b:51f2
78.123.81.243 0:0:0:0:0:ffff:4e7b:51f3
78.123.81.244 0:0:0:0:0:ffff:4e7b:51f4
78.123.81.245 0:0:0:0:0:ffff:4e7b:51f5
78.123.81.246 0:0:0:0:0:ffff:4e7b:51f6
78.123.81.247 0:0:0:0:0:ffff:4e7b:51f7
78.123.81.248 0:0:0:0:0:ffff:4e7b:51f8
78.123.81.249 0:0:0:0:0:ffff:4e7b:51f9
78.123.81.250 0:0:0:0:0:ffff:4e7b:51fa
78.123.81.251 0:0:0:0:0:ffff:4e7b:51fb
78.123.81.252 0:0:0:0:0:ffff:4e7b:51fc
78.123.81.253 0:0:0:0:0:ffff:4e7b:51fd
78.123.81.254 0:0:0:0:0:ffff:4e7b:51fe
78.123.81.255 0:0:0:0:0:ffff:4e7b: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.