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
144.21.100.1 0:0:0:0:0:ffff:9015:6401
144.21.100.2 0:0:0:0:0:ffff:9015:6402
144.21.100.3 0:0:0:0:0:ffff:9015:6403
144.21.100.4 0:0:0:0:0:ffff:9015:6404
144.21.100.5 0:0:0:0:0:ffff:9015:6405
144.21.100.6 0:0:0:0:0:ffff:9015:6406
144.21.100.7 0:0:0:0:0:ffff:9015:6407
144.21.100.8 0:0:0:0:0:ffff:9015:6408
144.21.100.9 0:0:0:0:0:ffff:9015:6409
144.21.100.10 0:0:0:0:0:ffff:9015:640a
144.21.100.11 0:0:0:0:0:ffff:9015:640b
144.21.100.12 0:0:0:0:0:ffff:9015:640c
144.21.100.13 0:0:0:0:0:ffff:9015:640d
144.21.100.14 0:0:0:0:0:ffff:9015:640e
144.21.100.15 0:0:0:0:0:ffff:9015:640f
144.21.100.16 0:0:0:0:0:ffff:9015:6410
144.21.100.17 0:0:0:0:0:ffff:9015:6411
144.21.100.18 0:0:0:0:0:ffff:9015:6412
144.21.100.19 0:0:0:0:0:ffff:9015:6413
144.21.100.20 0:0:0:0:0:ffff:9015:6414
144.21.100.21 0:0:0:0:0:ffff:9015:6415
144.21.100.22 0:0:0:0:0:ffff:9015:6416
144.21.100.23 0:0:0:0:0:ffff:9015:6417
144.21.100.24 0:0:0:0:0:ffff:9015:6418
144.21.100.25 0:0:0:0:0:ffff:9015:6419
144.21.100.26 0:0:0:0:0:ffff:9015:641a
144.21.100.27 0:0:0:0:0:ffff:9015:641b
144.21.100.28 0:0:0:0:0:ffff:9015:641c
144.21.100.29 0:0:0:0:0:ffff:9015:641d
144.21.100.30 0:0:0:0:0:ffff:9015:641e
144.21.100.31 0:0:0:0:0:ffff:9015:641f
144.21.100.32 0:0:0:0:0:ffff:9015:6420
144.21.100.33 0:0:0:0:0:ffff:9015:6421
144.21.100.34 0:0:0:0:0:ffff:9015:6422
144.21.100.35 0:0:0:0:0:ffff:9015:6423
144.21.100.36 0:0:0:0:0:ffff:9015:6424
144.21.100.37 0:0:0:0:0:ffff:9015:6425
144.21.100.38 0:0:0:0:0:ffff:9015:6426
144.21.100.39 0:0:0:0:0:ffff:9015:6427
144.21.100.40 0:0:0:0:0:ffff:9015:6428
144.21.100.41 0:0:0:0:0:ffff:9015:6429
144.21.100.42 0:0:0:0:0:ffff:9015:642a
144.21.100.43 0:0:0:0:0:ffff:9015:642b
144.21.100.44 0:0:0:0:0:ffff:9015:642c
144.21.100.45 0:0:0:0:0:ffff:9015:642d
144.21.100.46 0:0:0:0:0:ffff:9015:642e
144.21.100.47 0:0:0:0:0:ffff:9015:642f
144.21.100.48 0:0:0:0:0:ffff:9015:6430
144.21.100.49 0:0:0:0:0:ffff:9015:6431
144.21.100.50 0:0:0:0:0:ffff:9015:6432
144.21.100.51 0:0:0:0:0:ffff:9015:6433
144.21.100.52 0:0:0:0:0:ffff:9015:6434
144.21.100.53 0:0:0:0:0:ffff:9015:6435
144.21.100.54 0:0:0:0:0:ffff:9015:6436
144.21.100.55 0:0:0:0:0:ffff:9015:6437
144.21.100.56 0:0:0:0:0:ffff:9015:6438
144.21.100.57 0:0:0:0:0:ffff:9015:6439
144.21.100.58 0:0:0:0:0:ffff:9015:643a
144.21.100.59 0:0:0:0:0:ffff:9015:643b
144.21.100.60 0:0:0:0:0:ffff:9015:643c


144.21.100.61 0:0:0:0:0:ffff:9015:643d
144.21.100.62 0:0:0:0:0:ffff:9015:643e
144.21.100.63 0:0:0:0:0:ffff:9015:643f
144.21.100.64 0:0:0:0:0:ffff:9015:6440
144.21.100.65 0:0:0:0:0:ffff:9015:6441
144.21.100.66 0:0:0:0:0:ffff:9015:6442
144.21.100.67 0:0:0:0:0:ffff:9015:6443
144.21.100.68 0:0:0:0:0:ffff:9015:6444
144.21.100.69 0:0:0:0:0:ffff:9015:6445
144.21.100.70 0:0:0:0:0:ffff:9015:6446
144.21.100.71 0:0:0:0:0:ffff:9015:6447
144.21.100.72 0:0:0:0:0:ffff:9015:6448
144.21.100.73 0:0:0:0:0:ffff:9015:6449
144.21.100.74 0:0:0:0:0:ffff:9015:644a
144.21.100.75 0:0:0:0:0:ffff:9015:644b
144.21.100.76 0:0:0:0:0:ffff:9015:644c
144.21.100.77 0:0:0:0:0:ffff:9015:644d
144.21.100.78 0:0:0:0:0:ffff:9015:644e
144.21.100.79 0:0:0:0:0:ffff:9015:644f
144.21.100.80 0:0:0:0:0:ffff:9015:6450
144.21.100.81 0:0:0:0:0:ffff:9015:6451
144.21.100.82 0:0:0:0:0:ffff:9015:6452
144.21.100.83 0:0:0:0:0:ffff:9015:6453
144.21.100.84 0:0:0:0:0:ffff:9015:6454
144.21.100.85 0:0:0:0:0:ffff:9015:6455
144.21.100.86 0:0:0:0:0:ffff:9015:6456
144.21.100.87 0:0:0:0:0:ffff:9015:6457
144.21.100.88 0:0:0:0:0:ffff:9015:6458
144.21.100.89 0:0:0:0:0:ffff:9015:6459
144.21.100.90 0:0:0:0:0:ffff:9015:645a
144.21.100.91 0:0:0:0:0:ffff:9015:645b
144.21.100.92 0:0:0:0:0:ffff:9015:645c
144.21.100.93 0:0:0:0:0:ffff:9015:645d
144.21.100.94 0:0:0:0:0:ffff:9015:645e
144.21.100.95 0:0:0:0:0:ffff:9015:645f
144.21.100.96 0:0:0:0:0:ffff:9015:6460
144.21.100.97 0:0:0:0:0:ffff:9015:6461
144.21.100.98 0:0:0:0:0:ffff:9015:6462
144.21.100.99 0:0:0:0:0:ffff:9015:6463
144.21.100.100 0:0:0:0:0:ffff:9015:6464
144.21.100.101 0:0:0:0:0:ffff:9015:6465
144.21.100.102 0:0:0:0:0:ffff:9015:6466
144.21.100.103 0:0:0:0:0:ffff:9015:6467
144.21.100.104 0:0:0:0:0:ffff:9015:6468
144.21.100.105 0:0:0:0:0:ffff:9015:6469
144.21.100.106 0:0:0:0:0:ffff:9015:646a
144.21.100.107 0:0:0:0:0:ffff:9015:646b
144.21.100.108 0:0:0:0:0:ffff:9015:646c
144.21.100.109 0:0:0:0:0:ffff:9015:646d
144.21.100.110 0:0:0:0:0:ffff:9015:646e
144.21.100.111 0:0:0:0:0:ffff:9015:646f
144.21.100.112 0:0:0:0:0:ffff:9015:6470
144.21.100.113 0:0:0:0:0:ffff:9015:6471
144.21.100.114 0:0:0:0:0:ffff:9015:6472
144.21.100.115 0:0:0:0:0:ffff:9015:6473
144.21.100.116 0:0:0:0:0:ffff:9015:6474
144.21.100.117 0:0:0:0:0:ffff:9015:6475
144.21.100.118 0:0:0:0:0:ffff:9015:6476
144.21.100.119 0:0:0:0:0:ffff:9015:6477
144.21.100.120 0:0:0:0:0:ffff:9015:6478


144.21.100.121 0:0:0:0:0:ffff:9015:6479
144.21.100.122 0:0:0:0:0:ffff:9015:647a
144.21.100.123 0:0:0:0:0:ffff:9015:647b
144.21.100.124 0:0:0:0:0:ffff:9015:647c
144.21.100.125 0:0:0:0:0:ffff:9015:647d
144.21.100.126 0:0:0:0:0:ffff:9015:647e
144.21.100.127 0:0:0:0:0:ffff:9015:647f
144.21.100.128 0:0:0:0:0:ffff:9015:6480
144.21.100.129 0:0:0:0:0:ffff:9015:6481
144.21.100.130 0:0:0:0:0:ffff:9015:6482
144.21.100.131 0:0:0:0:0:ffff:9015:6483
144.21.100.132 0:0:0:0:0:ffff:9015:6484
144.21.100.133 0:0:0:0:0:ffff:9015:6485
144.21.100.134 0:0:0:0:0:ffff:9015:6486
144.21.100.135 0:0:0:0:0:ffff:9015:6487
144.21.100.136 0:0:0:0:0:ffff:9015:6488
144.21.100.137 0:0:0:0:0:ffff:9015:6489
144.21.100.138 0:0:0:0:0:ffff:9015:648a
144.21.100.139 0:0:0:0:0:ffff:9015:648b
144.21.100.140 0:0:0:0:0:ffff:9015:648c
144.21.100.141 0:0:0:0:0:ffff:9015:648d
144.21.100.142 0:0:0:0:0:ffff:9015:648e
144.21.100.143 0:0:0:0:0:ffff:9015:648f
144.21.100.144 0:0:0:0:0:ffff:9015:6490
144.21.100.145 0:0:0:0:0:ffff:9015:6491
144.21.100.146 0:0:0:0:0:ffff:9015:6492
144.21.100.147 0:0:0:0:0:ffff:9015:6493
144.21.100.148 0:0:0:0:0:ffff:9015:6494
144.21.100.149 0:0:0:0:0:ffff:9015:6495
144.21.100.150 0:0:0:0:0:ffff:9015:6496
144.21.100.151 0:0:0:0:0:ffff:9015:6497
144.21.100.152 0:0:0:0:0:ffff:9015:6498
144.21.100.153 0:0:0:0:0:ffff:9015:6499
144.21.100.154 0:0:0:0:0:ffff:9015:649a
144.21.100.155 0:0:0:0:0:ffff:9015:649b
144.21.100.156 0:0:0:0:0:ffff:9015:649c
144.21.100.157 0:0:0:0:0:ffff:9015:649d
144.21.100.158 0:0:0:0:0:ffff:9015:649e
144.21.100.159 0:0:0:0:0:ffff:9015:649f
144.21.100.160 0:0:0:0:0:ffff:9015:64a0
144.21.100.161 0:0:0:0:0:ffff:9015:64a1
144.21.100.162 0:0:0:0:0:ffff:9015:64a2
144.21.100.163 0:0:0:0:0:ffff:9015:64a3
144.21.100.164 0:0:0:0:0:ffff:9015:64a4
144.21.100.165 0:0:0:0:0:ffff:9015:64a5
144.21.100.166 0:0:0:0:0:ffff:9015:64a6
144.21.100.167 0:0:0:0:0:ffff:9015:64a7
144.21.100.168 0:0:0:0:0:ffff:9015:64a8
144.21.100.169 0:0:0:0:0:ffff:9015:64a9
144.21.100.170 0:0:0:0:0:ffff:9015:64aa
144.21.100.171 0:0:0:0:0:ffff:9015:64ab
144.21.100.172 0:0:0:0:0:ffff:9015:64ac
144.21.100.173 0:0:0:0:0:ffff:9015:64ad
144.21.100.174 0:0:0:0:0:ffff:9015:64ae
144.21.100.175 0:0:0:0:0:ffff:9015:64af
144.21.100.176 0:0:0:0:0:ffff:9015:64b0
144.21.100.177 0:0:0:0:0:ffff:9015:64b1
144.21.100.178 0:0:0:0:0:ffff:9015:64b2
144.21.100.179 0:0:0:0:0:ffff:9015:64b3
144.21.100.180 0:0:0:0:0:ffff:9015:64b4


144.21.100.181 0:0:0:0:0:ffff:9015:64b5
144.21.100.182 0:0:0:0:0:ffff:9015:64b6
144.21.100.183 0:0:0:0:0:ffff:9015:64b7
144.21.100.184 0:0:0:0:0:ffff:9015:64b8
144.21.100.185 0:0:0:0:0:ffff:9015:64b9
144.21.100.186 0:0:0:0:0:ffff:9015:64ba
144.21.100.187 0:0:0:0:0:ffff:9015:64bb
144.21.100.188 0:0:0:0:0:ffff:9015:64bc
144.21.100.189 0:0:0:0:0:ffff:9015:64bd
144.21.100.190 0:0:0:0:0:ffff:9015:64be
144.21.100.191 0:0:0:0:0:ffff:9015:64bf
144.21.100.192 0:0:0:0:0:ffff:9015:64c0
144.21.100.193 0:0:0:0:0:ffff:9015:64c1
144.21.100.194 0:0:0:0:0:ffff:9015:64c2
144.21.100.195 0:0:0:0:0:ffff:9015:64c3
144.21.100.196 0:0:0:0:0:ffff:9015:64c4
144.21.100.197 0:0:0:0:0:ffff:9015:64c5
144.21.100.198 0:0:0:0:0:ffff:9015:64c6
144.21.100.199 0:0:0:0:0:ffff:9015:64c7
144.21.100.200 0:0:0:0:0:ffff:9015:64c8
144.21.100.201 0:0:0:0:0:ffff:9015:64c9
144.21.100.202 0:0:0:0:0:ffff:9015:64ca
144.21.100.203 0:0:0:0:0:ffff:9015:64cb
144.21.100.204 0:0:0:0:0:ffff:9015:64cc
144.21.100.205 0:0:0:0:0:ffff:9015:64cd
144.21.100.206 0:0:0:0:0:ffff:9015:64ce
144.21.100.207 0:0:0:0:0:ffff:9015:64cf
144.21.100.208 0:0:0:0:0:ffff:9015:64d0
144.21.100.209 0:0:0:0:0:ffff:9015:64d1
144.21.100.210 0:0:0:0:0:ffff:9015:64d2
144.21.100.211 0:0:0:0:0:ffff:9015:64d3
144.21.100.212 0:0:0:0:0:ffff:9015:64d4
144.21.100.213 0:0:0:0:0:ffff:9015:64d5
144.21.100.214 0:0:0:0:0:ffff:9015:64d6
144.21.100.215 0:0:0:0:0:ffff:9015:64d7
144.21.100.216 0:0:0:0:0:ffff:9015:64d8
144.21.100.217 0:0:0:0:0:ffff:9015:64d9
144.21.100.218 0:0:0:0:0:ffff:9015:64da
144.21.100.219 0:0:0:0:0:ffff:9015:64db
144.21.100.220 0:0:0:0:0:ffff:9015:64dc
144.21.100.221 0:0:0:0:0:ffff:9015:64dd
144.21.100.222 0:0:0:0:0:ffff:9015:64de
144.21.100.223 0:0:0:0:0:ffff:9015:64df
144.21.100.224 0:0:0:0:0:ffff:9015:64e0
144.21.100.225 0:0:0:0:0:ffff:9015:64e1
144.21.100.226 0:0:0:0:0:ffff:9015:64e2
144.21.100.227 0:0:0:0:0:ffff:9015:64e3
144.21.100.228 0:0:0:0:0:ffff:9015:64e4
144.21.100.229 0:0:0:0:0:ffff:9015:64e5
144.21.100.230 0:0:0:0:0:ffff:9015:64e6
144.21.100.231 0:0:0:0:0:ffff:9015:64e7
144.21.100.232 0:0:0:0:0:ffff:9015:64e8
144.21.100.233 0:0:0:0:0:ffff:9015:64e9
144.21.100.234 0:0:0:0:0:ffff:9015:64ea
144.21.100.235 0:0:0:0:0:ffff:9015:64eb
144.21.100.236 0:0:0:0:0:ffff:9015:64ec
144.21.100.237 0:0:0:0:0:ffff:9015:64ed
144.21.100.238 0:0:0:0:0:ffff:9015:64ee
144.21.100.239 0:0:0:0:0:ffff:9015:64ef
144.21.100.240 0:0:0:0:0:ffff:9015:64f0
144.21.100.241 0:0:0:0:0:ffff:9015:64f1
144.21.100.242 0:0:0:0:0:ffff:9015:64f2
144.21.100.243 0:0:0:0:0:ffff:9015:64f3
144.21.100.244 0:0:0:0:0:ffff:9015:64f4
144.21.100.245 0:0:0:0:0:ffff:9015:64f5
144.21.100.246 0:0:0:0:0:ffff:9015:64f6
144.21.100.247 0:0:0:0:0:ffff:9015:64f7
144.21.100.248 0:0:0:0:0:ffff:9015:64f8
144.21.100.249 0:0:0:0:0:ffff:9015:64f9
144.21.100.250 0:0:0:0:0:ffff:9015:64fa
144.21.100.251 0:0:0:0:0:ffff:9015:64fb
144.21.100.252 0:0:0:0:0:ffff:9015:64fc
144.21.100.253 0:0:0:0:0:ffff:9015:64fd
144.21.100.254 0:0:0:0:0:ffff:9015:64fe
144.21.100.255 0:0:0:0:0:ffff:9015:64ff


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.