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
65.121.210.1 0:0:0:0:0:ffff:4179:d201
65.121.210.2 0:0:0:0:0:ffff:4179:d202
65.121.210.3 0:0:0:0:0:ffff:4179:d203
65.121.210.4 0:0:0:0:0:ffff:4179:d204
65.121.210.5 0:0:0:0:0:ffff:4179:d205
65.121.210.6 0:0:0:0:0:ffff:4179:d206
65.121.210.7 0:0:0:0:0:ffff:4179:d207
65.121.210.8 0:0:0:0:0:ffff:4179:d208
65.121.210.9 0:0:0:0:0:ffff:4179:d209
65.121.210.10 0:0:0:0:0:ffff:4179:d20a
65.121.210.11 0:0:0:0:0:ffff:4179:d20b
65.121.210.12 0:0:0:0:0:ffff:4179:d20c
65.121.210.13 0:0:0:0:0:ffff:4179:d20d
65.121.210.14 0:0:0:0:0:ffff:4179:d20e
65.121.210.15 0:0:0:0:0:ffff:4179:d20f
65.121.210.16 0:0:0:0:0:ffff:4179:d210
65.121.210.17 0:0:0:0:0:ffff:4179:d211
65.121.210.18 0:0:0:0:0:ffff:4179:d212
65.121.210.19 0:0:0:0:0:ffff:4179:d213
65.121.210.20 0:0:0:0:0:ffff:4179:d214
65.121.210.21 0:0:0:0:0:ffff:4179:d215
65.121.210.22 0:0:0:0:0:ffff:4179:d216
65.121.210.23 0:0:0:0:0:ffff:4179:d217
65.121.210.24 0:0:0:0:0:ffff:4179:d218
65.121.210.25 0:0:0:0:0:ffff:4179:d219
65.121.210.26 0:0:0:0:0:ffff:4179:d21a
65.121.210.27 0:0:0:0:0:ffff:4179:d21b
65.121.210.28 0:0:0:0:0:ffff:4179:d21c
65.121.210.29 0:0:0:0:0:ffff:4179:d21d
65.121.210.30 0:0:0:0:0:ffff:4179:d21e
65.121.210.31 0:0:0:0:0:ffff:4179:d21f
65.121.210.32 0:0:0:0:0:ffff:4179:d220
65.121.210.33 0:0:0:0:0:ffff:4179:d221
65.121.210.34 0:0:0:0:0:ffff:4179:d222
65.121.210.35 0:0:0:0:0:ffff:4179:d223
65.121.210.36 0:0:0:0:0:ffff:4179:d224
65.121.210.37 0:0:0:0:0:ffff:4179:d225
65.121.210.38 0:0:0:0:0:ffff:4179:d226
65.121.210.39 0:0:0:0:0:ffff:4179:d227
65.121.210.40 0:0:0:0:0:ffff:4179:d228
65.121.210.41 0:0:0:0:0:ffff:4179:d229
65.121.210.42 0:0:0:0:0:ffff:4179:d22a
65.121.210.43 0:0:0:0:0:ffff:4179:d22b
65.121.210.44 0:0:0:0:0:ffff:4179:d22c
65.121.210.45 0:0:0:0:0:ffff:4179:d22d
65.121.210.46 0:0:0:0:0:ffff:4179:d22e
65.121.210.47 0:0:0:0:0:ffff:4179:d22f
65.121.210.48 0:0:0:0:0:ffff:4179:d230
65.121.210.49 0:0:0:0:0:ffff:4179:d231
65.121.210.50 0:0:0:0:0:ffff:4179:d232
65.121.210.51 0:0:0:0:0:ffff:4179:d233
65.121.210.52 0:0:0:0:0:ffff:4179:d234
65.121.210.53 0:0:0:0:0:ffff:4179:d235
65.121.210.54 0:0:0:0:0:ffff:4179:d236
65.121.210.55 0:0:0:0:0:ffff:4179:d237
65.121.210.56 0:0:0:0:0:ffff:4179:d238
65.121.210.57 0:0:0:0:0:ffff:4179:d239
65.121.210.58 0:0:0:0:0:ffff:4179:d23a
65.121.210.59 0:0:0:0:0:ffff:4179:d23b
65.121.210.60 0:0:0:0:0:ffff:4179:d23c


65.121.210.61 0:0:0:0:0:ffff:4179:d23d
65.121.210.62 0:0:0:0:0:ffff:4179:d23e
65.121.210.63 0:0:0:0:0:ffff:4179:d23f
65.121.210.64 0:0:0:0:0:ffff:4179:d240
65.121.210.65 0:0:0:0:0:ffff:4179:d241
65.121.210.66 0:0:0:0:0:ffff:4179:d242
65.121.210.67 0:0:0:0:0:ffff:4179:d243
65.121.210.68 0:0:0:0:0:ffff:4179:d244
65.121.210.69 0:0:0:0:0:ffff:4179:d245
65.121.210.70 0:0:0:0:0:ffff:4179:d246
65.121.210.71 0:0:0:0:0:ffff:4179:d247
65.121.210.72 0:0:0:0:0:ffff:4179:d248
65.121.210.73 0:0:0:0:0:ffff:4179:d249
65.121.210.74 0:0:0:0:0:ffff:4179:d24a
65.121.210.75 0:0:0:0:0:ffff:4179:d24b
65.121.210.76 0:0:0:0:0:ffff:4179:d24c
65.121.210.77 0:0:0:0:0:ffff:4179:d24d
65.121.210.78 0:0:0:0:0:ffff:4179:d24e
65.121.210.79 0:0:0:0:0:ffff:4179:d24f
65.121.210.80 0:0:0:0:0:ffff:4179:d250
65.121.210.81 0:0:0:0:0:ffff:4179:d251
65.121.210.82 0:0:0:0:0:ffff:4179:d252
65.121.210.83 0:0:0:0:0:ffff:4179:d253
65.121.210.84 0:0:0:0:0:ffff:4179:d254
65.121.210.85 0:0:0:0:0:ffff:4179:d255
65.121.210.86 0:0:0:0:0:ffff:4179:d256
65.121.210.87 0:0:0:0:0:ffff:4179:d257
65.121.210.88 0:0:0:0:0:ffff:4179:d258
65.121.210.89 0:0:0:0:0:ffff:4179:d259
65.121.210.90 0:0:0:0:0:ffff:4179:d25a
65.121.210.91 0:0:0:0:0:ffff:4179:d25b
65.121.210.92 0:0:0:0:0:ffff:4179:d25c
65.121.210.93 0:0:0:0:0:ffff:4179:d25d
65.121.210.94 0:0:0:0:0:ffff:4179:d25e
65.121.210.95 0:0:0:0:0:ffff:4179:d25f
65.121.210.96 0:0:0:0:0:ffff:4179:d260
65.121.210.97 0:0:0:0:0:ffff:4179:d261
65.121.210.98 0:0:0:0:0:ffff:4179:d262
65.121.210.99 0:0:0:0:0:ffff:4179:d263
65.121.210.100 0:0:0:0:0:ffff:4179:d264
65.121.210.101 0:0:0:0:0:ffff:4179:d265
65.121.210.102 0:0:0:0:0:ffff:4179:d266
65.121.210.103 0:0:0:0:0:ffff:4179:d267
65.121.210.104 0:0:0:0:0:ffff:4179:d268
65.121.210.105 0:0:0:0:0:ffff:4179:d269
65.121.210.106 0:0:0:0:0:ffff:4179:d26a
65.121.210.107 0:0:0:0:0:ffff:4179:d26b
65.121.210.108 0:0:0:0:0:ffff:4179:d26c
65.121.210.109 0:0:0:0:0:ffff:4179:d26d
65.121.210.110 0:0:0:0:0:ffff:4179:d26e
65.121.210.111 0:0:0:0:0:ffff:4179:d26f
65.121.210.112 0:0:0:0:0:ffff:4179:d270
65.121.210.113 0:0:0:0:0:ffff:4179:d271
65.121.210.114 0:0:0:0:0:ffff:4179:d272
65.121.210.115 0:0:0:0:0:ffff:4179:d273
65.121.210.116 0:0:0:0:0:ffff:4179:d274
65.121.210.117 0:0:0:0:0:ffff:4179:d275
65.121.210.118 0:0:0:0:0:ffff:4179:d276
65.121.210.119 0:0:0:0:0:ffff:4179:d277
65.121.210.120 0:0:0:0:0:ffff:4179:d278


65.121.210.121 0:0:0:0:0:ffff:4179:d279
65.121.210.122 0:0:0:0:0:ffff:4179:d27a
65.121.210.123 0:0:0:0:0:ffff:4179:d27b
65.121.210.124 0:0:0:0:0:ffff:4179:d27c
65.121.210.125 0:0:0:0:0:ffff:4179:d27d
65.121.210.126 0:0:0:0:0:ffff:4179:d27e
65.121.210.127 0:0:0:0:0:ffff:4179:d27f
65.121.210.128 0:0:0:0:0:ffff:4179:d280
65.121.210.129 0:0:0:0:0:ffff:4179:d281
65.121.210.130 0:0:0:0:0:ffff:4179:d282
65.121.210.131 0:0:0:0:0:ffff:4179:d283
65.121.210.132 0:0:0:0:0:ffff:4179:d284
65.121.210.133 0:0:0:0:0:ffff:4179:d285
65.121.210.134 0:0:0:0:0:ffff:4179:d286
65.121.210.135 0:0:0:0:0:ffff:4179:d287
65.121.210.136 0:0:0:0:0:ffff:4179:d288
65.121.210.137 0:0:0:0:0:ffff:4179:d289
65.121.210.138 0:0:0:0:0:ffff:4179:d28a
65.121.210.139 0:0:0:0:0:ffff:4179:d28b
65.121.210.140 0:0:0:0:0:ffff:4179:d28c
65.121.210.141 0:0:0:0:0:ffff:4179:d28d
65.121.210.142 0:0:0:0:0:ffff:4179:d28e
65.121.210.143 0:0:0:0:0:ffff:4179:d28f
65.121.210.144 0:0:0:0:0:ffff:4179:d290
65.121.210.145 0:0:0:0:0:ffff:4179:d291
65.121.210.146 0:0:0:0:0:ffff:4179:d292
65.121.210.147 0:0:0:0:0:ffff:4179:d293
65.121.210.148 0:0:0:0:0:ffff:4179:d294
65.121.210.149 0:0:0:0:0:ffff:4179:d295
65.121.210.150 0:0:0:0:0:ffff:4179:d296
65.121.210.151 0:0:0:0:0:ffff:4179:d297
65.121.210.152 0:0:0:0:0:ffff:4179:d298
65.121.210.153 0:0:0:0:0:ffff:4179:d299
65.121.210.154 0:0:0:0:0:ffff:4179:d29a
65.121.210.155 0:0:0:0:0:ffff:4179:d29b
65.121.210.156 0:0:0:0:0:ffff:4179:d29c
65.121.210.157 0:0:0:0:0:ffff:4179:d29d
65.121.210.158 0:0:0:0:0:ffff:4179:d29e
65.121.210.159 0:0:0:0:0:ffff:4179:d29f
65.121.210.160 0:0:0:0:0:ffff:4179:d2a0
65.121.210.161 0:0:0:0:0:ffff:4179:d2a1
65.121.210.162 0:0:0:0:0:ffff:4179:d2a2
65.121.210.163 0:0:0:0:0:ffff:4179:d2a3
65.121.210.164 0:0:0:0:0:ffff:4179:d2a4
65.121.210.165 0:0:0:0:0:ffff:4179:d2a5
65.121.210.166 0:0:0:0:0:ffff:4179:d2a6
65.121.210.167 0:0:0:0:0:ffff:4179:d2a7
65.121.210.168 0:0:0:0:0:ffff:4179:d2a8
65.121.210.169 0:0:0:0:0:ffff:4179:d2a9
65.121.210.170 0:0:0:0:0:ffff:4179:d2aa
65.121.210.171 0:0:0:0:0:ffff:4179:d2ab
65.121.210.172 0:0:0:0:0:ffff:4179:d2ac
65.121.210.173 0:0:0:0:0:ffff:4179:d2ad
65.121.210.174 0:0:0:0:0:ffff:4179:d2ae
65.121.210.175 0:0:0:0:0:ffff:4179:d2af
65.121.210.176 0:0:0:0:0:ffff:4179:d2b0
65.121.210.177 0:0:0:0:0:ffff:4179:d2b1
65.121.210.178 0:0:0:0:0:ffff:4179:d2b2
65.121.210.179 0:0:0:0:0:ffff:4179:d2b3
65.121.210.180 0:0:0:0:0:ffff:4179:d2b4


65.121.210.181 0:0:0:0:0:ffff:4179:d2b5
65.121.210.182 0:0:0:0:0:ffff:4179:d2b6
65.121.210.183 0:0:0:0:0:ffff:4179:d2b7
65.121.210.184 0:0:0:0:0:ffff:4179:d2b8
65.121.210.185 0:0:0:0:0:ffff:4179:d2b9
65.121.210.186 0:0:0:0:0:ffff:4179:d2ba
65.121.210.187 0:0:0:0:0:ffff:4179:d2bb
65.121.210.188 0:0:0:0:0:ffff:4179:d2bc
65.121.210.189 0:0:0:0:0:ffff:4179:d2bd
65.121.210.190 0:0:0:0:0:ffff:4179:d2be
65.121.210.191 0:0:0:0:0:ffff:4179:d2bf
65.121.210.192 0:0:0:0:0:ffff:4179:d2c0
65.121.210.193 0:0:0:0:0:ffff:4179:d2c1
65.121.210.194 0:0:0:0:0:ffff:4179:d2c2
65.121.210.195 0:0:0:0:0:ffff:4179:d2c3
65.121.210.196 0:0:0:0:0:ffff:4179:d2c4
65.121.210.197 0:0:0:0:0:ffff:4179:d2c5
65.121.210.198 0:0:0:0:0:ffff:4179:d2c6
65.121.210.199 0:0:0:0:0:ffff:4179:d2c7
65.121.210.200 0:0:0:0:0:ffff:4179:d2c8
65.121.210.201 0:0:0:0:0:ffff:4179:d2c9
65.121.210.202 0:0:0:0:0:ffff:4179:d2ca
65.121.210.203 0:0:0:0:0:ffff:4179:d2cb
65.121.210.204 0:0:0:0:0:ffff:4179:d2cc
65.121.210.205 0:0:0:0:0:ffff:4179:d2cd
65.121.210.206 0:0:0:0:0:ffff:4179:d2ce
65.121.210.207 0:0:0:0:0:ffff:4179:d2cf
65.121.210.208 0:0:0:0:0:ffff:4179:d2d0
65.121.210.209 0:0:0:0:0:ffff:4179:d2d1
65.121.210.210 0:0:0:0:0:ffff:4179:d2d2
65.121.210.211 0:0:0:0:0:ffff:4179:d2d3
65.121.210.212 0:0:0:0:0:ffff:4179:d2d4
65.121.210.213 0:0:0:0:0:ffff:4179:d2d5
65.121.210.214 0:0:0:0:0:ffff:4179:d2d6
65.121.210.215 0:0:0:0:0:ffff:4179:d2d7
65.121.210.216 0:0:0:0:0:ffff:4179:d2d8
65.121.210.217 0:0:0:0:0:ffff:4179:d2d9
65.121.210.218 0:0:0:0:0:ffff:4179:d2da
65.121.210.219 0:0:0:0:0:ffff:4179:d2db
65.121.210.220 0:0:0:0:0:ffff:4179:d2dc
65.121.210.221 0:0:0:0:0:ffff:4179:d2dd
65.121.210.222 0:0:0:0:0:ffff:4179:d2de
65.121.210.223 0:0:0:0:0:ffff:4179:d2df
65.121.210.224 0:0:0:0:0:ffff:4179:d2e0
65.121.210.225 0:0:0:0:0:ffff:4179:d2e1
65.121.210.226 0:0:0:0:0:ffff:4179:d2e2
65.121.210.227 0:0:0:0:0:ffff:4179:d2e3
65.121.210.228 0:0:0:0:0:ffff:4179:d2e4
65.121.210.229 0:0:0:0:0:ffff:4179:d2e5
65.121.210.230 0:0:0:0:0:ffff:4179:d2e6
65.121.210.231 0:0:0:0:0:ffff:4179:d2e7
65.121.210.232 0:0:0:0:0:ffff:4179:d2e8
65.121.210.233 0:0:0:0:0:ffff:4179:d2e9
65.121.210.234 0:0:0:0:0:ffff:4179:d2ea
65.121.210.235 0:0:0:0:0:ffff:4179:d2eb
65.121.210.236 0:0:0:0:0:ffff:4179:d2ec
65.121.210.237 0:0:0:0:0:ffff:4179:d2ed
65.121.210.238 0:0:0:0:0:ffff:4179:d2ee
65.121.210.239 0:0:0:0:0:ffff:4179:d2ef
65.121.210.240 0:0:0:0:0:ffff:4179:d2f0
65.121.210.241 0:0:0:0:0:ffff:4179:d2f1
65.121.210.242 0:0:0:0:0:ffff:4179:d2f2
65.121.210.243 0:0:0:0:0:ffff:4179:d2f3
65.121.210.244 0:0:0:0:0:ffff:4179:d2f4
65.121.210.245 0:0:0:0:0:ffff:4179:d2f5
65.121.210.246 0:0:0:0:0:ffff:4179:d2f6
65.121.210.247 0:0:0:0:0:ffff:4179:d2f7
65.121.210.248 0:0:0:0:0:ffff:4179:d2f8
65.121.210.249 0:0:0:0:0:ffff:4179:d2f9
65.121.210.250 0:0:0:0:0:ffff:4179:d2fa
65.121.210.251 0:0:0:0:0:ffff:4179:d2fb
65.121.210.252 0:0:0:0:0:ffff:4179:d2fc
65.121.210.253 0:0:0:0:0:ffff:4179:d2fd
65.121.210.254 0:0:0:0:0:ffff:4179:d2fe
65.121.210.255 0:0:0:0:0:ffff:4179:d2ff


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.