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
139.12.18.1 0:0:0:0:0:ffff:8b0c:1201
139.12.18.2 0:0:0:0:0:ffff:8b0c:1202
139.12.18.3 0:0:0:0:0:ffff:8b0c:1203
139.12.18.4 0:0:0:0:0:ffff:8b0c:1204
139.12.18.5 0:0:0:0:0:ffff:8b0c:1205
139.12.18.6 0:0:0:0:0:ffff:8b0c:1206
139.12.18.7 0:0:0:0:0:ffff:8b0c:1207
139.12.18.8 0:0:0:0:0:ffff:8b0c:1208
139.12.18.9 0:0:0:0:0:ffff:8b0c:1209
139.12.18.10 0:0:0:0:0:ffff:8b0c:120a
139.12.18.11 0:0:0:0:0:ffff:8b0c:120b
139.12.18.12 0:0:0:0:0:ffff:8b0c:120c
139.12.18.13 0:0:0:0:0:ffff:8b0c:120d
139.12.18.14 0:0:0:0:0:ffff:8b0c:120e
139.12.18.15 0:0:0:0:0:ffff:8b0c:120f
139.12.18.16 0:0:0:0:0:ffff:8b0c:1210
139.12.18.17 0:0:0:0:0:ffff:8b0c:1211
139.12.18.18 0:0:0:0:0:ffff:8b0c:1212
139.12.18.19 0:0:0:0:0:ffff:8b0c:1213
139.12.18.20 0:0:0:0:0:ffff:8b0c:1214
139.12.18.21 0:0:0:0:0:ffff:8b0c:1215
139.12.18.22 0:0:0:0:0:ffff:8b0c:1216
139.12.18.23 0:0:0:0:0:ffff:8b0c:1217
139.12.18.24 0:0:0:0:0:ffff:8b0c:1218
139.12.18.25 0:0:0:0:0:ffff:8b0c:1219
139.12.18.26 0:0:0:0:0:ffff:8b0c:121a
139.12.18.27 0:0:0:0:0:ffff:8b0c:121b
139.12.18.28 0:0:0:0:0:ffff:8b0c:121c
139.12.18.29 0:0:0:0:0:ffff:8b0c:121d
139.12.18.30 0:0:0:0:0:ffff:8b0c:121e
139.12.18.31 0:0:0:0:0:ffff:8b0c:121f
139.12.18.32 0:0:0:0:0:ffff:8b0c:1220
139.12.18.33 0:0:0:0:0:ffff:8b0c:1221
139.12.18.34 0:0:0:0:0:ffff:8b0c:1222
139.12.18.35 0:0:0:0:0:ffff:8b0c:1223
139.12.18.36 0:0:0:0:0:ffff:8b0c:1224
139.12.18.37 0:0:0:0:0:ffff:8b0c:1225
139.12.18.38 0:0:0:0:0:ffff:8b0c:1226
139.12.18.39 0:0:0:0:0:ffff:8b0c:1227
139.12.18.40 0:0:0:0:0:ffff:8b0c:1228
139.12.18.41 0:0:0:0:0:ffff:8b0c:1229
139.12.18.42 0:0:0:0:0:ffff:8b0c:122a
139.12.18.43 0:0:0:0:0:ffff:8b0c:122b
139.12.18.44 0:0:0:0:0:ffff:8b0c:122c
139.12.18.45 0:0:0:0:0:ffff:8b0c:122d
139.12.18.46 0:0:0:0:0:ffff:8b0c:122e
139.12.18.47 0:0:0:0:0:ffff:8b0c:122f
139.12.18.48 0:0:0:0:0:ffff:8b0c:1230
139.12.18.49 0:0:0:0:0:ffff:8b0c:1231
139.12.18.50 0:0:0:0:0:ffff:8b0c:1232
139.12.18.51 0:0:0:0:0:ffff:8b0c:1233
139.12.18.52 0:0:0:0:0:ffff:8b0c:1234
139.12.18.53 0:0:0:0:0:ffff:8b0c:1235
139.12.18.54 0:0:0:0:0:ffff:8b0c:1236
139.12.18.55 0:0:0:0:0:ffff:8b0c:1237
139.12.18.56 0:0:0:0:0:ffff:8b0c:1238
139.12.18.57 0:0:0:0:0:ffff:8b0c:1239
139.12.18.58 0:0:0:0:0:ffff:8b0c:123a
139.12.18.59 0:0:0:0:0:ffff:8b0c:123b
139.12.18.60 0:0:0:0:0:ffff:8b0c:123c


139.12.18.61 0:0:0:0:0:ffff:8b0c:123d
139.12.18.62 0:0:0:0:0:ffff:8b0c:123e
139.12.18.63 0:0:0:0:0:ffff:8b0c:123f
139.12.18.64 0:0:0:0:0:ffff:8b0c:1240
139.12.18.65 0:0:0:0:0:ffff:8b0c:1241
139.12.18.66 0:0:0:0:0:ffff:8b0c:1242
139.12.18.67 0:0:0:0:0:ffff:8b0c:1243
139.12.18.68 0:0:0:0:0:ffff:8b0c:1244
139.12.18.69 0:0:0:0:0:ffff:8b0c:1245
139.12.18.70 0:0:0:0:0:ffff:8b0c:1246
139.12.18.71 0:0:0:0:0:ffff:8b0c:1247
139.12.18.72 0:0:0:0:0:ffff:8b0c:1248
139.12.18.73 0:0:0:0:0:ffff:8b0c:1249
139.12.18.74 0:0:0:0:0:ffff:8b0c:124a
139.12.18.75 0:0:0:0:0:ffff:8b0c:124b
139.12.18.76 0:0:0:0:0:ffff:8b0c:124c
139.12.18.77 0:0:0:0:0:ffff:8b0c:124d
139.12.18.78 0:0:0:0:0:ffff:8b0c:124e
139.12.18.79 0:0:0:0:0:ffff:8b0c:124f
139.12.18.80 0:0:0:0:0:ffff:8b0c:1250
139.12.18.81 0:0:0:0:0:ffff:8b0c:1251
139.12.18.82 0:0:0:0:0:ffff:8b0c:1252
139.12.18.83 0:0:0:0:0:ffff:8b0c:1253
139.12.18.84 0:0:0:0:0:ffff:8b0c:1254
139.12.18.85 0:0:0:0:0:ffff:8b0c:1255
139.12.18.86 0:0:0:0:0:ffff:8b0c:1256
139.12.18.87 0:0:0:0:0:ffff:8b0c:1257
139.12.18.88 0:0:0:0:0:ffff:8b0c:1258
139.12.18.89 0:0:0:0:0:ffff:8b0c:1259
139.12.18.90 0:0:0:0:0:ffff:8b0c:125a
139.12.18.91 0:0:0:0:0:ffff:8b0c:125b
139.12.18.92 0:0:0:0:0:ffff:8b0c:125c
139.12.18.93 0:0:0:0:0:ffff:8b0c:125d
139.12.18.94 0:0:0:0:0:ffff:8b0c:125e
139.12.18.95 0:0:0:0:0:ffff:8b0c:125f
139.12.18.96 0:0:0:0:0:ffff:8b0c:1260
139.12.18.97 0:0:0:0:0:ffff:8b0c:1261
139.12.18.98 0:0:0:0:0:ffff:8b0c:1262
139.12.18.99 0:0:0:0:0:ffff:8b0c:1263
139.12.18.100 0:0:0:0:0:ffff:8b0c:1264
139.12.18.101 0:0:0:0:0:ffff:8b0c:1265
139.12.18.102 0:0:0:0:0:ffff:8b0c:1266
139.12.18.103 0:0:0:0:0:ffff:8b0c:1267
139.12.18.104 0:0:0:0:0:ffff:8b0c:1268
139.12.18.105 0:0:0:0:0:ffff:8b0c:1269
139.12.18.106 0:0:0:0:0:ffff:8b0c:126a
139.12.18.107 0:0:0:0:0:ffff:8b0c:126b
139.12.18.108 0:0:0:0:0:ffff:8b0c:126c
139.12.18.109 0:0:0:0:0:ffff:8b0c:126d
139.12.18.110 0:0:0:0:0:ffff:8b0c:126e
139.12.18.111 0:0:0:0:0:ffff:8b0c:126f
139.12.18.112 0:0:0:0:0:ffff:8b0c:1270
139.12.18.113 0:0:0:0:0:ffff:8b0c:1271
139.12.18.114 0:0:0:0:0:ffff:8b0c:1272
139.12.18.115 0:0:0:0:0:ffff:8b0c:1273
139.12.18.116 0:0:0:0:0:ffff:8b0c:1274
139.12.18.117 0:0:0:0:0:ffff:8b0c:1275
139.12.18.118 0:0:0:0:0:ffff:8b0c:1276
139.12.18.119 0:0:0:0:0:ffff:8b0c:1277
139.12.18.120 0:0:0:0:0:ffff:8b0c:1278


139.12.18.121 0:0:0:0:0:ffff:8b0c:1279
139.12.18.122 0:0:0:0:0:ffff:8b0c:127a
139.12.18.123 0:0:0:0:0:ffff:8b0c:127b
139.12.18.124 0:0:0:0:0:ffff:8b0c:127c
139.12.18.125 0:0:0:0:0:ffff:8b0c:127d
139.12.18.126 0:0:0:0:0:ffff:8b0c:127e
139.12.18.127 0:0:0:0:0:ffff:8b0c:127f
139.12.18.128 0:0:0:0:0:ffff:8b0c:1280
139.12.18.129 0:0:0:0:0:ffff:8b0c:1281
139.12.18.130 0:0:0:0:0:ffff:8b0c:1282
139.12.18.131 0:0:0:0:0:ffff:8b0c:1283
139.12.18.132 0:0:0:0:0:ffff:8b0c:1284
139.12.18.133 0:0:0:0:0:ffff:8b0c:1285
139.12.18.134 0:0:0:0:0:ffff:8b0c:1286
139.12.18.135 0:0:0:0:0:ffff:8b0c:1287
139.12.18.136 0:0:0:0:0:ffff:8b0c:1288
139.12.18.137 0:0:0:0:0:ffff:8b0c:1289
139.12.18.138 0:0:0:0:0:ffff:8b0c:128a
139.12.18.139 0:0:0:0:0:ffff:8b0c:128b
139.12.18.140 0:0:0:0:0:ffff:8b0c:128c
139.12.18.141 0:0:0:0:0:ffff:8b0c:128d
139.12.18.142 0:0:0:0:0:ffff:8b0c:128e
139.12.18.143 0:0:0:0:0:ffff:8b0c:128f
139.12.18.144 0:0:0:0:0:ffff:8b0c:1290
139.12.18.145 0:0:0:0:0:ffff:8b0c:1291
139.12.18.146 0:0:0:0:0:ffff:8b0c:1292
139.12.18.147 0:0:0:0:0:ffff:8b0c:1293
139.12.18.148 0:0:0:0:0:ffff:8b0c:1294
139.12.18.149 0:0:0:0:0:ffff:8b0c:1295
139.12.18.150 0:0:0:0:0:ffff:8b0c:1296
139.12.18.151 0:0:0:0:0:ffff:8b0c:1297
139.12.18.152 0:0:0:0:0:ffff:8b0c:1298
139.12.18.153 0:0:0:0:0:ffff:8b0c:1299
139.12.18.154 0:0:0:0:0:ffff:8b0c:129a
139.12.18.155 0:0:0:0:0:ffff:8b0c:129b
139.12.18.156 0:0:0:0:0:ffff:8b0c:129c
139.12.18.157 0:0:0:0:0:ffff:8b0c:129d
139.12.18.158 0:0:0:0:0:ffff:8b0c:129e
139.12.18.159 0:0:0:0:0:ffff:8b0c:129f
139.12.18.160 0:0:0:0:0:ffff:8b0c:12a0
139.12.18.161 0:0:0:0:0:ffff:8b0c:12a1
139.12.18.162 0:0:0:0:0:ffff:8b0c:12a2
139.12.18.163 0:0:0:0:0:ffff:8b0c:12a3
139.12.18.164 0:0:0:0:0:ffff:8b0c:12a4
139.12.18.165 0:0:0:0:0:ffff:8b0c:12a5
139.12.18.166 0:0:0:0:0:ffff:8b0c:12a6
139.12.18.167 0:0:0:0:0:ffff:8b0c:12a7
139.12.18.168 0:0:0:0:0:ffff:8b0c:12a8
139.12.18.169 0:0:0:0:0:ffff:8b0c:12a9
139.12.18.170 0:0:0:0:0:ffff:8b0c:12aa
139.12.18.171 0:0:0:0:0:ffff:8b0c:12ab
139.12.18.172 0:0:0:0:0:ffff:8b0c:12ac
139.12.18.173 0:0:0:0:0:ffff:8b0c:12ad
139.12.18.174 0:0:0:0:0:ffff:8b0c:12ae
139.12.18.175 0:0:0:0:0:ffff:8b0c:12af
139.12.18.176 0:0:0:0:0:ffff:8b0c:12b0
139.12.18.177 0:0:0:0:0:ffff:8b0c:12b1
139.12.18.178 0:0:0:0:0:ffff:8b0c:12b2
139.12.18.179 0:0:0:0:0:ffff:8b0c:12b3
139.12.18.180 0:0:0:0:0:ffff:8b0c:12b4


139.12.18.181 0:0:0:0:0:ffff:8b0c:12b5
139.12.18.182 0:0:0:0:0:ffff:8b0c:12b6
139.12.18.183 0:0:0:0:0:ffff:8b0c:12b7
139.12.18.184 0:0:0:0:0:ffff:8b0c:12b8
139.12.18.185 0:0:0:0:0:ffff:8b0c:12b9
139.12.18.186 0:0:0:0:0:ffff:8b0c:12ba
139.12.18.187 0:0:0:0:0:ffff:8b0c:12bb
139.12.18.188 0:0:0:0:0:ffff:8b0c:12bc
139.12.18.189 0:0:0:0:0:ffff:8b0c:12bd
139.12.18.190 0:0:0:0:0:ffff:8b0c:12be
139.12.18.191 0:0:0:0:0:ffff:8b0c:12bf
139.12.18.192 0:0:0:0:0:ffff:8b0c:12c0
139.12.18.193 0:0:0:0:0:ffff:8b0c:12c1
139.12.18.194 0:0:0:0:0:ffff:8b0c:12c2
139.12.18.195 0:0:0:0:0:ffff:8b0c:12c3
139.12.18.196 0:0:0:0:0:ffff:8b0c:12c4
139.12.18.197 0:0:0:0:0:ffff:8b0c:12c5
139.12.18.198 0:0:0:0:0:ffff:8b0c:12c6
139.12.18.199 0:0:0:0:0:ffff:8b0c:12c7
139.12.18.200 0:0:0:0:0:ffff:8b0c:12c8
139.12.18.201 0:0:0:0:0:ffff:8b0c:12c9
139.12.18.202 0:0:0:0:0:ffff:8b0c:12ca
139.12.18.203 0:0:0:0:0:ffff:8b0c:12cb
139.12.18.204 0:0:0:0:0:ffff:8b0c:12cc
139.12.18.205 0:0:0:0:0:ffff:8b0c:12cd
139.12.18.206 0:0:0:0:0:ffff:8b0c:12ce
139.12.18.207 0:0:0:0:0:ffff:8b0c:12cf
139.12.18.208 0:0:0:0:0:ffff:8b0c:12d0
139.12.18.209 0:0:0:0:0:ffff:8b0c:12d1
139.12.18.210 0:0:0:0:0:ffff:8b0c:12d2
139.12.18.211 0:0:0:0:0:ffff:8b0c:12d3
139.12.18.212 0:0:0:0:0:ffff:8b0c:12d4
139.12.18.213 0:0:0:0:0:ffff:8b0c:12d5
139.12.18.214 0:0:0:0:0:ffff:8b0c:12d6
139.12.18.215 0:0:0:0:0:ffff:8b0c:12d7
139.12.18.216 0:0:0:0:0:ffff:8b0c:12d8
139.12.18.217 0:0:0:0:0:ffff:8b0c:12d9
139.12.18.218 0:0:0:0:0:ffff:8b0c:12da
139.12.18.219 0:0:0:0:0:ffff:8b0c:12db
139.12.18.220 0:0:0:0:0:ffff:8b0c:12dc
139.12.18.221 0:0:0:0:0:ffff:8b0c:12dd
139.12.18.222 0:0:0:0:0:ffff:8b0c:12de
139.12.18.223 0:0:0:0:0:ffff:8b0c:12df
139.12.18.224 0:0:0:0:0:ffff:8b0c:12e0
139.12.18.225 0:0:0:0:0:ffff:8b0c:12e1
139.12.18.226 0:0:0:0:0:ffff:8b0c:12e2
139.12.18.227 0:0:0:0:0:ffff:8b0c:12e3
139.12.18.228 0:0:0:0:0:ffff:8b0c:12e4
139.12.18.229 0:0:0:0:0:ffff:8b0c:12e5
139.12.18.230 0:0:0:0:0:ffff:8b0c:12e6
139.12.18.231 0:0:0:0:0:ffff:8b0c:12e7
139.12.18.232 0:0:0:0:0:ffff:8b0c:12e8
139.12.18.233 0:0:0:0:0:ffff:8b0c:12e9
139.12.18.234 0:0:0:0:0:ffff:8b0c:12ea
139.12.18.235 0:0:0:0:0:ffff:8b0c:12eb
139.12.18.236 0:0:0:0:0:ffff:8b0c:12ec
139.12.18.237 0:0:0:0:0:ffff:8b0c:12ed
139.12.18.238 0:0:0:0:0:ffff:8b0c:12ee
139.12.18.239 0:0:0:0:0:ffff:8b0c:12ef
139.12.18.240 0:0:0:0:0:ffff:8b0c:12f0
139.12.18.241 0:0:0:0:0:ffff:8b0c:12f1
139.12.18.242 0:0:0:0:0:ffff:8b0c:12f2
139.12.18.243 0:0:0:0:0:ffff:8b0c:12f3
139.12.18.244 0:0:0:0:0:ffff:8b0c:12f4
139.12.18.245 0:0:0:0:0:ffff:8b0c:12f5
139.12.18.246 0:0:0:0:0:ffff:8b0c:12f6
139.12.18.247 0:0:0:0:0:ffff:8b0c:12f7
139.12.18.248 0:0:0:0:0:ffff:8b0c:12f8
139.12.18.249 0:0:0:0:0:ffff:8b0c:12f9
139.12.18.250 0:0:0:0:0:ffff:8b0c:12fa
139.12.18.251 0:0:0:0:0:ffff:8b0c:12fb
139.12.18.252 0:0:0:0:0:ffff:8b0c:12fc
139.12.18.253 0:0:0:0:0:ffff:8b0c:12fd
139.12.18.254 0:0:0:0:0:ffff:8b0c:12fe
139.12.18.255 0:0:0:0:0:ffff:8b0c:12ff


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.