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
199.145.66.1 0:0:0:0:0:ffff:c791:4201
199.145.66.2 0:0:0:0:0:ffff:c791:4202
199.145.66.3 0:0:0:0:0:ffff:c791:4203
199.145.66.4 0:0:0:0:0:ffff:c791:4204
199.145.66.5 0:0:0:0:0:ffff:c791:4205
199.145.66.6 0:0:0:0:0:ffff:c791:4206
199.145.66.7 0:0:0:0:0:ffff:c791:4207
199.145.66.8 0:0:0:0:0:ffff:c791:4208
199.145.66.9 0:0:0:0:0:ffff:c791:4209
199.145.66.10 0:0:0:0:0:ffff:c791:420a
199.145.66.11 0:0:0:0:0:ffff:c791:420b
199.145.66.12 0:0:0:0:0:ffff:c791:420c
199.145.66.13 0:0:0:0:0:ffff:c791:420d
199.145.66.14 0:0:0:0:0:ffff:c791:420e
199.145.66.15 0:0:0:0:0:ffff:c791:420f
199.145.66.16 0:0:0:0:0:ffff:c791:4210
199.145.66.17 0:0:0:0:0:ffff:c791:4211
199.145.66.18 0:0:0:0:0:ffff:c791:4212
199.145.66.19 0:0:0:0:0:ffff:c791:4213
199.145.66.20 0:0:0:0:0:ffff:c791:4214
199.145.66.21 0:0:0:0:0:ffff:c791:4215
199.145.66.22 0:0:0:0:0:ffff:c791:4216
199.145.66.23 0:0:0:0:0:ffff:c791:4217
199.145.66.24 0:0:0:0:0:ffff:c791:4218
199.145.66.25 0:0:0:0:0:ffff:c791:4219
199.145.66.26 0:0:0:0:0:ffff:c791:421a
199.145.66.27 0:0:0:0:0:ffff:c791:421b
199.145.66.28 0:0:0:0:0:ffff:c791:421c
199.145.66.29 0:0:0:0:0:ffff:c791:421d
199.145.66.30 0:0:0:0:0:ffff:c791:421e
199.145.66.31 0:0:0:0:0:ffff:c791:421f
199.145.66.32 0:0:0:0:0:ffff:c791:4220
199.145.66.33 0:0:0:0:0:ffff:c791:4221
199.145.66.34 0:0:0:0:0:ffff:c791:4222
199.145.66.35 0:0:0:0:0:ffff:c791:4223
199.145.66.36 0:0:0:0:0:ffff:c791:4224
199.145.66.37 0:0:0:0:0:ffff:c791:4225
199.145.66.38 0:0:0:0:0:ffff:c791:4226
199.145.66.39 0:0:0:0:0:ffff:c791:4227
199.145.66.40 0:0:0:0:0:ffff:c791:4228
199.145.66.41 0:0:0:0:0:ffff:c791:4229
199.145.66.42 0:0:0:0:0:ffff:c791:422a
199.145.66.43 0:0:0:0:0:ffff:c791:422b
199.145.66.44 0:0:0:0:0:ffff:c791:422c
199.145.66.45 0:0:0:0:0:ffff:c791:422d
199.145.66.46 0:0:0:0:0:ffff:c791:422e
199.145.66.47 0:0:0:0:0:ffff:c791:422f
199.145.66.48 0:0:0:0:0:ffff:c791:4230
199.145.66.49 0:0:0:0:0:ffff:c791:4231
199.145.66.50 0:0:0:0:0:ffff:c791:4232
199.145.66.51 0:0:0:0:0:ffff:c791:4233
199.145.66.52 0:0:0:0:0:ffff:c791:4234
199.145.66.53 0:0:0:0:0:ffff:c791:4235
199.145.66.54 0:0:0:0:0:ffff:c791:4236
199.145.66.55 0:0:0:0:0:ffff:c791:4237
199.145.66.56 0:0:0:0:0:ffff:c791:4238
199.145.66.57 0:0:0:0:0:ffff:c791:4239
199.145.66.58 0:0:0:0:0:ffff:c791:423a
199.145.66.59 0:0:0:0:0:ffff:c791:423b
199.145.66.60 0:0:0:0:0:ffff:c791:423c


199.145.66.61 0:0:0:0:0:ffff:c791:423d
199.145.66.62 0:0:0:0:0:ffff:c791:423e
199.145.66.63 0:0:0:0:0:ffff:c791:423f
199.145.66.64 0:0:0:0:0:ffff:c791:4240
199.145.66.65 0:0:0:0:0:ffff:c791:4241
199.145.66.66 0:0:0:0:0:ffff:c791:4242
199.145.66.67 0:0:0:0:0:ffff:c791:4243
199.145.66.68 0:0:0:0:0:ffff:c791:4244
199.145.66.69 0:0:0:0:0:ffff:c791:4245
199.145.66.70 0:0:0:0:0:ffff:c791:4246
199.145.66.71 0:0:0:0:0:ffff:c791:4247
199.145.66.72 0:0:0:0:0:ffff:c791:4248
199.145.66.73 0:0:0:0:0:ffff:c791:4249
199.145.66.74 0:0:0:0:0:ffff:c791:424a
199.145.66.75 0:0:0:0:0:ffff:c791:424b
199.145.66.76 0:0:0:0:0:ffff:c791:424c
199.145.66.77 0:0:0:0:0:ffff:c791:424d
199.145.66.78 0:0:0:0:0:ffff:c791:424e
199.145.66.79 0:0:0:0:0:ffff:c791:424f
199.145.66.80 0:0:0:0:0:ffff:c791:4250
199.145.66.81 0:0:0:0:0:ffff:c791:4251
199.145.66.82 0:0:0:0:0:ffff:c791:4252
199.145.66.83 0:0:0:0:0:ffff:c791:4253
199.145.66.84 0:0:0:0:0:ffff:c791:4254
199.145.66.85 0:0:0:0:0:ffff:c791:4255
199.145.66.86 0:0:0:0:0:ffff:c791:4256
199.145.66.87 0:0:0:0:0:ffff:c791:4257
199.145.66.88 0:0:0:0:0:ffff:c791:4258
199.145.66.89 0:0:0:0:0:ffff:c791:4259
199.145.66.90 0:0:0:0:0:ffff:c791:425a
199.145.66.91 0:0:0:0:0:ffff:c791:425b
199.145.66.92 0:0:0:0:0:ffff:c791:425c
199.145.66.93 0:0:0:0:0:ffff:c791:425d
199.145.66.94 0:0:0:0:0:ffff:c791:425e
199.145.66.95 0:0:0:0:0:ffff:c791:425f
199.145.66.96 0:0:0:0:0:ffff:c791:4260
199.145.66.97 0:0:0:0:0:ffff:c791:4261
199.145.66.98 0:0:0:0:0:ffff:c791:4262
199.145.66.99 0:0:0:0:0:ffff:c791:4263
199.145.66.100 0:0:0:0:0:ffff:c791:4264
199.145.66.101 0:0:0:0:0:ffff:c791:4265
199.145.66.102 0:0:0:0:0:ffff:c791:4266
199.145.66.103 0:0:0:0:0:ffff:c791:4267
199.145.66.104 0:0:0:0:0:ffff:c791:4268
199.145.66.105 0:0:0:0:0:ffff:c791:4269
199.145.66.106 0:0:0:0:0:ffff:c791:426a
199.145.66.107 0:0:0:0:0:ffff:c791:426b
199.145.66.108 0:0:0:0:0:ffff:c791:426c
199.145.66.109 0:0:0:0:0:ffff:c791:426d
199.145.66.110 0:0:0:0:0:ffff:c791:426e
199.145.66.111 0:0:0:0:0:ffff:c791:426f
199.145.66.112 0:0:0:0:0:ffff:c791:4270
199.145.66.113 0:0:0:0:0:ffff:c791:4271
199.145.66.114 0:0:0:0:0:ffff:c791:4272
199.145.66.115 0:0:0:0:0:ffff:c791:4273
199.145.66.116 0:0:0:0:0:ffff:c791:4274
199.145.66.117 0:0:0:0:0:ffff:c791:4275
199.145.66.118 0:0:0:0:0:ffff:c791:4276
199.145.66.119 0:0:0:0:0:ffff:c791:4277
199.145.66.120 0:0:0:0:0:ffff:c791:4278


199.145.66.121 0:0:0:0:0:ffff:c791:4279
199.145.66.122 0:0:0:0:0:ffff:c791:427a
199.145.66.123 0:0:0:0:0:ffff:c791:427b
199.145.66.124 0:0:0:0:0:ffff:c791:427c
199.145.66.125 0:0:0:0:0:ffff:c791:427d
199.145.66.126 0:0:0:0:0:ffff:c791:427e
199.145.66.127 0:0:0:0:0:ffff:c791:427f
199.145.66.128 0:0:0:0:0:ffff:c791:4280
199.145.66.129 0:0:0:0:0:ffff:c791:4281
199.145.66.130 0:0:0:0:0:ffff:c791:4282
199.145.66.131 0:0:0:0:0:ffff:c791:4283
199.145.66.132 0:0:0:0:0:ffff:c791:4284
199.145.66.133 0:0:0:0:0:ffff:c791:4285
199.145.66.134 0:0:0:0:0:ffff:c791:4286
199.145.66.135 0:0:0:0:0:ffff:c791:4287
199.145.66.136 0:0:0:0:0:ffff:c791:4288
199.145.66.137 0:0:0:0:0:ffff:c791:4289
199.145.66.138 0:0:0:0:0:ffff:c791:428a
199.145.66.139 0:0:0:0:0:ffff:c791:428b
199.145.66.140 0:0:0:0:0:ffff:c791:428c
199.145.66.141 0:0:0:0:0:ffff:c791:428d
199.145.66.142 0:0:0:0:0:ffff:c791:428e
199.145.66.143 0:0:0:0:0:ffff:c791:428f
199.145.66.144 0:0:0:0:0:ffff:c791:4290
199.145.66.145 0:0:0:0:0:ffff:c791:4291
199.145.66.146 0:0:0:0:0:ffff:c791:4292
199.145.66.147 0:0:0:0:0:ffff:c791:4293
199.145.66.148 0:0:0:0:0:ffff:c791:4294
199.145.66.149 0:0:0:0:0:ffff:c791:4295
199.145.66.150 0:0:0:0:0:ffff:c791:4296
199.145.66.151 0:0:0:0:0:ffff:c791:4297
199.145.66.152 0:0:0:0:0:ffff:c791:4298
199.145.66.153 0:0:0:0:0:ffff:c791:4299
199.145.66.154 0:0:0:0:0:ffff:c791:429a
199.145.66.155 0:0:0:0:0:ffff:c791:429b
199.145.66.156 0:0:0:0:0:ffff:c791:429c
199.145.66.157 0:0:0:0:0:ffff:c791:429d
199.145.66.158 0:0:0:0:0:ffff:c791:429e
199.145.66.159 0:0:0:0:0:ffff:c791:429f
199.145.66.160 0:0:0:0:0:ffff:c791:42a0
199.145.66.161 0:0:0:0:0:ffff:c791:42a1
199.145.66.162 0:0:0:0:0:ffff:c791:42a2
199.145.66.163 0:0:0:0:0:ffff:c791:42a3
199.145.66.164 0:0:0:0:0:ffff:c791:42a4
199.145.66.165 0:0:0:0:0:ffff:c791:42a5
199.145.66.166 0:0:0:0:0:ffff:c791:42a6
199.145.66.167 0:0:0:0:0:ffff:c791:42a7
199.145.66.168 0:0:0:0:0:ffff:c791:42a8
199.145.66.169 0:0:0:0:0:ffff:c791:42a9
199.145.66.170 0:0:0:0:0:ffff:c791:42aa
199.145.66.171 0:0:0:0:0:ffff:c791:42ab
199.145.66.172 0:0:0:0:0:ffff:c791:42ac
199.145.66.173 0:0:0:0:0:ffff:c791:42ad
199.145.66.174 0:0:0:0:0:ffff:c791:42ae
199.145.66.175 0:0:0:0:0:ffff:c791:42af
199.145.66.176 0:0:0:0:0:ffff:c791:42b0
199.145.66.177 0:0:0:0:0:ffff:c791:42b1
199.145.66.178 0:0:0:0:0:ffff:c791:42b2
199.145.66.179 0:0:0:0:0:ffff:c791:42b3
199.145.66.180 0:0:0:0:0:ffff:c791:42b4


199.145.66.181 0:0:0:0:0:ffff:c791:42b5
199.145.66.182 0:0:0:0:0:ffff:c791:42b6
199.145.66.183 0:0:0:0:0:ffff:c791:42b7
199.145.66.184 0:0:0:0:0:ffff:c791:42b8
199.145.66.185 0:0:0:0:0:ffff:c791:42b9
199.145.66.186 0:0:0:0:0:ffff:c791:42ba
199.145.66.187 0:0:0:0:0:ffff:c791:42bb
199.145.66.188 0:0:0:0:0:ffff:c791:42bc
199.145.66.189 0:0:0:0:0:ffff:c791:42bd
199.145.66.190 0:0:0:0:0:ffff:c791:42be
199.145.66.191 0:0:0:0:0:ffff:c791:42bf
199.145.66.192 0:0:0:0:0:ffff:c791:42c0
199.145.66.193 0:0:0:0:0:ffff:c791:42c1
199.145.66.194 0:0:0:0:0:ffff:c791:42c2
199.145.66.195 0:0:0:0:0:ffff:c791:42c3
199.145.66.196 0:0:0:0:0:ffff:c791:42c4
199.145.66.197 0:0:0:0:0:ffff:c791:42c5
199.145.66.198 0:0:0:0:0:ffff:c791:42c6
199.145.66.199 0:0:0:0:0:ffff:c791:42c7
199.145.66.200 0:0:0:0:0:ffff:c791:42c8
199.145.66.201 0:0:0:0:0:ffff:c791:42c9
199.145.66.202 0:0:0:0:0:ffff:c791:42ca
199.145.66.203 0:0:0:0:0:ffff:c791:42cb
199.145.66.204 0:0:0:0:0:ffff:c791:42cc
199.145.66.205 0:0:0:0:0:ffff:c791:42cd
199.145.66.206 0:0:0:0:0:ffff:c791:42ce
199.145.66.207 0:0:0:0:0:ffff:c791:42cf
199.145.66.208 0:0:0:0:0:ffff:c791:42d0
199.145.66.209 0:0:0:0:0:ffff:c791:42d1
199.145.66.210 0:0:0:0:0:ffff:c791:42d2
199.145.66.211 0:0:0:0:0:ffff:c791:42d3
199.145.66.212 0:0:0:0:0:ffff:c791:42d4
199.145.66.213 0:0:0:0:0:ffff:c791:42d5
199.145.66.214 0:0:0:0:0:ffff:c791:42d6
199.145.66.215 0:0:0:0:0:ffff:c791:42d7
199.145.66.216 0:0:0:0:0:ffff:c791:42d8
199.145.66.217 0:0:0:0:0:ffff:c791:42d9
199.145.66.218 0:0:0:0:0:ffff:c791:42da
199.145.66.219 0:0:0:0:0:ffff:c791:42db
199.145.66.220 0:0:0:0:0:ffff:c791:42dc
199.145.66.221 0:0:0:0:0:ffff:c791:42dd
199.145.66.222 0:0:0:0:0:ffff:c791:42de
199.145.66.223 0:0:0:0:0:ffff:c791:42df
199.145.66.224 0:0:0:0:0:ffff:c791:42e0
199.145.66.225 0:0:0:0:0:ffff:c791:42e1
199.145.66.226 0:0:0:0:0:ffff:c791:42e2
199.145.66.227 0:0:0:0:0:ffff:c791:42e3
199.145.66.228 0:0:0:0:0:ffff:c791:42e4
199.145.66.229 0:0:0:0:0:ffff:c791:42e5
199.145.66.230 0:0:0:0:0:ffff:c791:42e6
199.145.66.231 0:0:0:0:0:ffff:c791:42e7
199.145.66.232 0:0:0:0:0:ffff:c791:42e8
199.145.66.233 0:0:0:0:0:ffff:c791:42e9
199.145.66.234 0:0:0:0:0:ffff:c791:42ea
199.145.66.235 0:0:0:0:0:ffff:c791:42eb
199.145.66.236 0:0:0:0:0:ffff:c791:42ec
199.145.66.237 0:0:0:0:0:ffff:c791:42ed
199.145.66.238 0:0:0:0:0:ffff:c791:42ee
199.145.66.239 0:0:0:0:0:ffff:c791:42ef
199.145.66.240 0:0:0:0:0:ffff:c791:42f0
199.145.66.241 0:0:0:0:0:ffff:c791:42f1
199.145.66.242 0:0:0:0:0:ffff:c791:42f2
199.145.66.243 0:0:0:0:0:ffff:c791:42f3
199.145.66.244 0:0:0:0:0:ffff:c791:42f4
199.145.66.245 0:0:0:0:0:ffff:c791:42f5
199.145.66.246 0:0:0:0:0:ffff:c791:42f6
199.145.66.247 0:0:0:0:0:ffff:c791:42f7
199.145.66.248 0:0:0:0:0:ffff:c791:42f8
199.145.66.249 0:0:0:0:0:ffff:c791:42f9
199.145.66.250 0:0:0:0:0:ffff:c791:42fa
199.145.66.251 0:0:0:0:0:ffff:c791:42fb
199.145.66.252 0:0:0:0:0:ffff:c791:42fc
199.145.66.253 0:0:0:0:0:ffff:c791:42fd
199.145.66.254 0:0:0:0:0:ffff:c791:42fe
199.145.66.255 0:0:0:0:0:ffff:c791:42ff


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.