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
65.121.51.1 0:0:0:0:0:ffff:4179:3301
65.121.51.2 0:0:0:0:0:ffff:4179:3302
65.121.51.3 0:0:0:0:0:ffff:4179:3303
65.121.51.4 0:0:0:0:0:ffff:4179:3304
65.121.51.5 0:0:0:0:0:ffff:4179:3305
65.121.51.6 0:0:0:0:0:ffff:4179:3306
65.121.51.7 0:0:0:0:0:ffff:4179:3307
65.121.51.8 0:0:0:0:0:ffff:4179:3308
65.121.51.9 0:0:0:0:0:ffff:4179:3309
65.121.51.10 0:0:0:0:0:ffff:4179:330a
65.121.51.11 0:0:0:0:0:ffff:4179:330b
65.121.51.12 0:0:0:0:0:ffff:4179:330c
65.121.51.13 0:0:0:0:0:ffff:4179:330d
65.121.51.14 0:0:0:0:0:ffff:4179:330e
65.121.51.15 0:0:0:0:0:ffff:4179:330f
65.121.51.16 0:0:0:0:0:ffff:4179:3310
65.121.51.17 0:0:0:0:0:ffff:4179:3311
65.121.51.18 0:0:0:0:0:ffff:4179:3312
65.121.51.19 0:0:0:0:0:ffff:4179:3313
65.121.51.20 0:0:0:0:0:ffff:4179:3314
65.121.51.21 0:0:0:0:0:ffff:4179:3315
65.121.51.22 0:0:0:0:0:ffff:4179:3316
65.121.51.23 0:0:0:0:0:ffff:4179:3317
65.121.51.24 0:0:0:0:0:ffff:4179:3318
65.121.51.25 0:0:0:0:0:ffff:4179:3319
65.121.51.26 0:0:0:0:0:ffff:4179:331a
65.121.51.27 0:0:0:0:0:ffff:4179:331b
65.121.51.28 0:0:0:0:0:ffff:4179:331c
65.121.51.29 0:0:0:0:0:ffff:4179:331d
65.121.51.30 0:0:0:0:0:ffff:4179:331e
65.121.51.31 0:0:0:0:0:ffff:4179:331f
65.121.51.32 0:0:0:0:0:ffff:4179:3320
65.121.51.33 0:0:0:0:0:ffff:4179:3321
65.121.51.34 0:0:0:0:0:ffff:4179:3322
65.121.51.35 0:0:0:0:0:ffff:4179:3323
65.121.51.36 0:0:0:0:0:ffff:4179:3324
65.121.51.37 0:0:0:0:0:ffff:4179:3325
65.121.51.38 0:0:0:0:0:ffff:4179:3326
65.121.51.39 0:0:0:0:0:ffff:4179:3327
65.121.51.40 0:0:0:0:0:ffff:4179:3328
65.121.51.41 0:0:0:0:0:ffff:4179:3329
65.121.51.42 0:0:0:0:0:ffff:4179:332a
65.121.51.43 0:0:0:0:0:ffff:4179:332b
65.121.51.44 0:0:0:0:0:ffff:4179:332c
65.121.51.45 0:0:0:0:0:ffff:4179:332d
65.121.51.46 0:0:0:0:0:ffff:4179:332e
65.121.51.47 0:0:0:0:0:ffff:4179:332f
65.121.51.48 0:0:0:0:0:ffff:4179:3330
65.121.51.49 0:0:0:0:0:ffff:4179:3331
65.121.51.50 0:0:0:0:0:ffff:4179:3332
65.121.51.51 0:0:0:0:0:ffff:4179:3333
65.121.51.52 0:0:0:0:0:ffff:4179:3334
65.121.51.53 0:0:0:0:0:ffff:4179:3335
65.121.51.54 0:0:0:0:0:ffff:4179:3336
65.121.51.55 0:0:0:0:0:ffff:4179:3337
65.121.51.56 0:0:0:0:0:ffff:4179:3338
65.121.51.57 0:0:0:0:0:ffff:4179:3339
65.121.51.58 0:0:0:0:0:ffff:4179:333a
65.121.51.59 0:0:0:0:0:ffff:4179:333b
65.121.51.60 0:0:0:0:0:ffff:4179:333c


65.121.51.61 0:0:0:0:0:ffff:4179:333d
65.121.51.62 0:0:0:0:0:ffff:4179:333e
65.121.51.63 0:0:0:0:0:ffff:4179:333f
65.121.51.64 0:0:0:0:0:ffff:4179:3340
65.121.51.65 0:0:0:0:0:ffff:4179:3341
65.121.51.66 0:0:0:0:0:ffff:4179:3342
65.121.51.67 0:0:0:0:0:ffff:4179:3343
65.121.51.68 0:0:0:0:0:ffff:4179:3344
65.121.51.69 0:0:0:0:0:ffff:4179:3345
65.121.51.70 0:0:0:0:0:ffff:4179:3346
65.121.51.71 0:0:0:0:0:ffff:4179:3347
65.121.51.72 0:0:0:0:0:ffff:4179:3348
65.121.51.73 0:0:0:0:0:ffff:4179:3349
65.121.51.74 0:0:0:0:0:ffff:4179:334a
65.121.51.75 0:0:0:0:0:ffff:4179:334b
65.121.51.76 0:0:0:0:0:ffff:4179:334c
65.121.51.77 0:0:0:0:0:ffff:4179:334d
65.121.51.78 0:0:0:0:0:ffff:4179:334e
65.121.51.79 0:0:0:0:0:ffff:4179:334f
65.121.51.80 0:0:0:0:0:ffff:4179:3350
65.121.51.81 0:0:0:0:0:ffff:4179:3351
65.121.51.82 0:0:0:0:0:ffff:4179:3352
65.121.51.83 0:0:0:0:0:ffff:4179:3353
65.121.51.84 0:0:0:0:0:ffff:4179:3354
65.121.51.85 0:0:0:0:0:ffff:4179:3355
65.121.51.86 0:0:0:0:0:ffff:4179:3356
65.121.51.87 0:0:0:0:0:ffff:4179:3357
65.121.51.88 0:0:0:0:0:ffff:4179:3358
65.121.51.89 0:0:0:0:0:ffff:4179:3359
65.121.51.90 0:0:0:0:0:ffff:4179:335a
65.121.51.91 0:0:0:0:0:ffff:4179:335b
65.121.51.92 0:0:0:0:0:ffff:4179:335c
65.121.51.93 0:0:0:0:0:ffff:4179:335d
65.121.51.94 0:0:0:0:0:ffff:4179:335e
65.121.51.95 0:0:0:0:0:ffff:4179:335f
65.121.51.96 0:0:0:0:0:ffff:4179:3360
65.121.51.97 0:0:0:0:0:ffff:4179:3361
65.121.51.98 0:0:0:0:0:ffff:4179:3362
65.121.51.99 0:0:0:0:0:ffff:4179:3363
65.121.51.100 0:0:0:0:0:ffff:4179:3364
65.121.51.101 0:0:0:0:0:ffff:4179:3365
65.121.51.102 0:0:0:0:0:ffff:4179:3366
65.121.51.103 0:0:0:0:0:ffff:4179:3367
65.121.51.104 0:0:0:0:0:ffff:4179:3368
65.121.51.105 0:0:0:0:0:ffff:4179:3369
65.121.51.106 0:0:0:0:0:ffff:4179:336a
65.121.51.107 0:0:0:0:0:ffff:4179:336b
65.121.51.108 0:0:0:0:0:ffff:4179:336c
65.121.51.109 0:0:0:0:0:ffff:4179:336d
65.121.51.110 0:0:0:0:0:ffff:4179:336e
65.121.51.111 0:0:0:0:0:ffff:4179:336f
65.121.51.112 0:0:0:0:0:ffff:4179:3370
65.121.51.113 0:0:0:0:0:ffff:4179:3371
65.121.51.114 0:0:0:0:0:ffff:4179:3372
65.121.51.115 0:0:0:0:0:ffff:4179:3373
65.121.51.116 0:0:0:0:0:ffff:4179:3374
65.121.51.117 0:0:0:0:0:ffff:4179:3375
65.121.51.118 0:0:0:0:0:ffff:4179:3376
65.121.51.119 0:0:0:0:0:ffff:4179:3377
65.121.51.120 0:0:0:0:0:ffff:4179:3378


65.121.51.121 0:0:0:0:0:ffff:4179:3379
65.121.51.122 0:0:0:0:0:ffff:4179:337a
65.121.51.123 0:0:0:0:0:ffff:4179:337b
65.121.51.124 0:0:0:0:0:ffff:4179:337c
65.121.51.125 0:0:0:0:0:ffff:4179:337d
65.121.51.126 0:0:0:0:0:ffff:4179:337e
65.121.51.127 0:0:0:0:0:ffff:4179:337f
65.121.51.128 0:0:0:0:0:ffff:4179:3380
65.121.51.129 0:0:0:0:0:ffff:4179:3381
65.121.51.130 0:0:0:0:0:ffff:4179:3382
65.121.51.131 0:0:0:0:0:ffff:4179:3383
65.121.51.132 0:0:0:0:0:ffff:4179:3384
65.121.51.133 0:0:0:0:0:ffff:4179:3385
65.121.51.134 0:0:0:0:0:ffff:4179:3386
65.121.51.135 0:0:0:0:0:ffff:4179:3387
65.121.51.136 0:0:0:0:0:ffff:4179:3388
65.121.51.137 0:0:0:0:0:ffff:4179:3389
65.121.51.138 0:0:0:0:0:ffff:4179:338a
65.121.51.139 0:0:0:0:0:ffff:4179:338b
65.121.51.140 0:0:0:0:0:ffff:4179:338c
65.121.51.141 0:0:0:0:0:ffff:4179:338d
65.121.51.142 0:0:0:0:0:ffff:4179:338e
65.121.51.143 0:0:0:0:0:ffff:4179:338f
65.121.51.144 0:0:0:0:0:ffff:4179:3390
65.121.51.145 0:0:0:0:0:ffff:4179:3391
65.121.51.146 0:0:0:0:0:ffff:4179:3392
65.121.51.147 0:0:0:0:0:ffff:4179:3393
65.121.51.148 0:0:0:0:0:ffff:4179:3394
65.121.51.149 0:0:0:0:0:ffff:4179:3395
65.121.51.150 0:0:0:0:0:ffff:4179:3396
65.121.51.151 0:0:0:0:0:ffff:4179:3397
65.121.51.152 0:0:0:0:0:ffff:4179:3398
65.121.51.153 0:0:0:0:0:ffff:4179:3399
65.121.51.154 0:0:0:0:0:ffff:4179:339a
65.121.51.155 0:0:0:0:0:ffff:4179:339b
65.121.51.156 0:0:0:0:0:ffff:4179:339c
65.121.51.157 0:0:0:0:0:ffff:4179:339d
65.121.51.158 0:0:0:0:0:ffff:4179:339e
65.121.51.159 0:0:0:0:0:ffff:4179:339f
65.121.51.160 0:0:0:0:0:ffff:4179:33a0
65.121.51.161 0:0:0:0:0:ffff:4179:33a1
65.121.51.162 0:0:0:0:0:ffff:4179:33a2
65.121.51.163 0:0:0:0:0:ffff:4179:33a3
65.121.51.164 0:0:0:0:0:ffff:4179:33a4
65.121.51.165 0:0:0:0:0:ffff:4179:33a5
65.121.51.166 0:0:0:0:0:ffff:4179:33a6
65.121.51.167 0:0:0:0:0:ffff:4179:33a7
65.121.51.168 0:0:0:0:0:ffff:4179:33a8
65.121.51.169 0:0:0:0:0:ffff:4179:33a9
65.121.51.170 0:0:0:0:0:ffff:4179:33aa
65.121.51.171 0:0:0:0:0:ffff:4179:33ab
65.121.51.172 0:0:0:0:0:ffff:4179:33ac
65.121.51.173 0:0:0:0:0:ffff:4179:33ad
65.121.51.174 0:0:0:0:0:ffff:4179:33ae
65.121.51.175 0:0:0:0:0:ffff:4179:33af
65.121.51.176 0:0:0:0:0:ffff:4179:33b0
65.121.51.177 0:0:0:0:0:ffff:4179:33b1
65.121.51.178 0:0:0:0:0:ffff:4179:33b2
65.121.51.179 0:0:0:0:0:ffff:4179:33b3
65.121.51.180 0:0:0:0:0:ffff:4179:33b4


65.121.51.181 0:0:0:0:0:ffff:4179:33b5
65.121.51.182 0:0:0:0:0:ffff:4179:33b6
65.121.51.183 0:0:0:0:0:ffff:4179:33b7
65.121.51.184 0:0:0:0:0:ffff:4179:33b8
65.121.51.185 0:0:0:0:0:ffff:4179:33b9
65.121.51.186 0:0:0:0:0:ffff:4179:33ba
65.121.51.187 0:0:0:0:0:ffff:4179:33bb
65.121.51.188 0:0:0:0:0:ffff:4179:33bc
65.121.51.189 0:0:0:0:0:ffff:4179:33bd
65.121.51.190 0:0:0:0:0:ffff:4179:33be
65.121.51.191 0:0:0:0:0:ffff:4179:33bf
65.121.51.192 0:0:0:0:0:ffff:4179:33c0
65.121.51.193 0:0:0:0:0:ffff:4179:33c1
65.121.51.194 0:0:0:0:0:ffff:4179:33c2
65.121.51.195 0:0:0:0:0:ffff:4179:33c3
65.121.51.196 0:0:0:0:0:ffff:4179:33c4
65.121.51.197 0:0:0:0:0:ffff:4179:33c5
65.121.51.198 0:0:0:0:0:ffff:4179:33c6
65.121.51.199 0:0:0:0:0:ffff:4179:33c7
65.121.51.200 0:0:0:0:0:ffff:4179:33c8
65.121.51.201 0:0:0:0:0:ffff:4179:33c9
65.121.51.202 0:0:0:0:0:ffff:4179:33ca
65.121.51.203 0:0:0:0:0:ffff:4179:33cb
65.121.51.204 0:0:0:0:0:ffff:4179:33cc
65.121.51.205 0:0:0:0:0:ffff:4179:33cd
65.121.51.206 0:0:0:0:0:ffff:4179:33ce
65.121.51.207 0:0:0:0:0:ffff:4179:33cf
65.121.51.208 0:0:0:0:0:ffff:4179:33d0
65.121.51.209 0:0:0:0:0:ffff:4179:33d1
65.121.51.210 0:0:0:0:0:ffff:4179:33d2
65.121.51.211 0:0:0:0:0:ffff:4179:33d3
65.121.51.212 0:0:0:0:0:ffff:4179:33d4
65.121.51.213 0:0:0:0:0:ffff:4179:33d5
65.121.51.214 0:0:0:0:0:ffff:4179:33d6
65.121.51.215 0:0:0:0:0:ffff:4179:33d7
65.121.51.216 0:0:0:0:0:ffff:4179:33d8
65.121.51.217 0:0:0:0:0:ffff:4179:33d9
65.121.51.218 0:0:0:0:0:ffff:4179:33da
65.121.51.219 0:0:0:0:0:ffff:4179:33db
65.121.51.220 0:0:0:0:0:ffff:4179:33dc
65.121.51.221 0:0:0:0:0:ffff:4179:33dd
65.121.51.222 0:0:0:0:0:ffff:4179:33de
65.121.51.223 0:0:0:0:0:ffff:4179:33df
65.121.51.224 0:0:0:0:0:ffff:4179:33e0
65.121.51.225 0:0:0:0:0:ffff:4179:33e1
65.121.51.226 0:0:0:0:0:ffff:4179:33e2
65.121.51.227 0:0:0:0:0:ffff:4179:33e3
65.121.51.228 0:0:0:0:0:ffff:4179:33e4
65.121.51.229 0:0:0:0:0:ffff:4179:33e5
65.121.51.230 0:0:0:0:0:ffff:4179:33e6
65.121.51.231 0:0:0:0:0:ffff:4179:33e7
65.121.51.232 0:0:0:0:0:ffff:4179:33e8
65.121.51.233 0:0:0:0:0:ffff:4179:33e9
65.121.51.234 0:0:0:0:0:ffff:4179:33ea
65.121.51.235 0:0:0:0:0:ffff:4179:33eb
65.121.51.236 0:0:0:0:0:ffff:4179:33ec
65.121.51.237 0:0:0:0:0:ffff:4179:33ed
65.121.51.238 0:0:0:0:0:ffff:4179:33ee
65.121.51.239 0:0:0:0:0:ffff:4179:33ef
65.121.51.240 0:0:0:0:0:ffff:4179:33f0
65.121.51.241 0:0:0:0:0:ffff:4179:33f1
65.121.51.242 0:0:0:0:0:ffff:4179:33f2
65.121.51.243 0:0:0:0:0:ffff:4179:33f3
65.121.51.244 0:0:0:0:0:ffff:4179:33f4
65.121.51.245 0:0:0:0:0:ffff:4179:33f5
65.121.51.246 0:0:0:0:0:ffff:4179:33f6
65.121.51.247 0:0:0:0:0:ffff:4179:33f7
65.121.51.248 0:0:0:0:0:ffff:4179:33f8
65.121.51.249 0:0:0:0:0:ffff:4179:33f9
65.121.51.250 0:0:0:0:0:ffff:4179:33fa
65.121.51.251 0:0:0:0:0:ffff:4179:33fb
65.121.51.252 0:0:0:0:0:ffff:4179:33fc
65.121.51.253 0:0:0:0:0:ffff:4179:33fd
65.121.51.254 0:0:0:0:0:ffff:4179:33fe
65.121.51.255 0:0:0:0:0:ffff:4179:33ff


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.