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
121.39.72.1 0:0:0:0:0:ffff:7927:4801
121.39.72.2 0:0:0:0:0:ffff:7927:4802
121.39.72.3 0:0:0:0:0:ffff:7927:4803
121.39.72.4 0:0:0:0:0:ffff:7927:4804
121.39.72.5 0:0:0:0:0:ffff:7927:4805
121.39.72.6 0:0:0:0:0:ffff:7927:4806
121.39.72.7 0:0:0:0:0:ffff:7927:4807
121.39.72.8 0:0:0:0:0:ffff:7927:4808
121.39.72.9 0:0:0:0:0:ffff:7927:4809
121.39.72.10 0:0:0:0:0:ffff:7927:480a
121.39.72.11 0:0:0:0:0:ffff:7927:480b
121.39.72.12 0:0:0:0:0:ffff:7927:480c
121.39.72.13 0:0:0:0:0:ffff:7927:480d
121.39.72.14 0:0:0:0:0:ffff:7927:480e
121.39.72.15 0:0:0:0:0:ffff:7927:480f
121.39.72.16 0:0:0:0:0:ffff:7927:4810
121.39.72.17 0:0:0:0:0:ffff:7927:4811
121.39.72.18 0:0:0:0:0:ffff:7927:4812
121.39.72.19 0:0:0:0:0:ffff:7927:4813
121.39.72.20 0:0:0:0:0:ffff:7927:4814
121.39.72.21 0:0:0:0:0:ffff:7927:4815
121.39.72.22 0:0:0:0:0:ffff:7927:4816
121.39.72.23 0:0:0:0:0:ffff:7927:4817
121.39.72.24 0:0:0:0:0:ffff:7927:4818
121.39.72.25 0:0:0:0:0:ffff:7927:4819
121.39.72.26 0:0:0:0:0:ffff:7927:481a
121.39.72.27 0:0:0:0:0:ffff:7927:481b
121.39.72.28 0:0:0:0:0:ffff:7927:481c
121.39.72.29 0:0:0:0:0:ffff:7927:481d
121.39.72.30 0:0:0:0:0:ffff:7927:481e
121.39.72.31 0:0:0:0:0:ffff:7927:481f
121.39.72.32 0:0:0:0:0:ffff:7927:4820
121.39.72.33 0:0:0:0:0:ffff:7927:4821
121.39.72.34 0:0:0:0:0:ffff:7927:4822
121.39.72.35 0:0:0:0:0:ffff:7927:4823
121.39.72.36 0:0:0:0:0:ffff:7927:4824
121.39.72.37 0:0:0:0:0:ffff:7927:4825
121.39.72.38 0:0:0:0:0:ffff:7927:4826
121.39.72.39 0:0:0:0:0:ffff:7927:4827
121.39.72.40 0:0:0:0:0:ffff:7927:4828
121.39.72.41 0:0:0:0:0:ffff:7927:4829
121.39.72.42 0:0:0:0:0:ffff:7927:482a
121.39.72.43 0:0:0:0:0:ffff:7927:482b
121.39.72.44 0:0:0:0:0:ffff:7927:482c
121.39.72.45 0:0:0:0:0:ffff:7927:482d
121.39.72.46 0:0:0:0:0:ffff:7927:482e
121.39.72.47 0:0:0:0:0:ffff:7927:482f
121.39.72.48 0:0:0:0:0:ffff:7927:4830
121.39.72.49 0:0:0:0:0:ffff:7927:4831
121.39.72.50 0:0:0:0:0:ffff:7927:4832
121.39.72.51 0:0:0:0:0:ffff:7927:4833
121.39.72.52 0:0:0:0:0:ffff:7927:4834
121.39.72.53 0:0:0:0:0:ffff:7927:4835
121.39.72.54 0:0:0:0:0:ffff:7927:4836
121.39.72.55 0:0:0:0:0:ffff:7927:4837
121.39.72.56 0:0:0:0:0:ffff:7927:4838
121.39.72.57 0:0:0:0:0:ffff:7927:4839
121.39.72.58 0:0:0:0:0:ffff:7927:483a
121.39.72.59 0:0:0:0:0:ffff:7927:483b
121.39.72.60 0:0:0:0:0:ffff:7927:483c


121.39.72.61 0:0:0:0:0:ffff:7927:483d
121.39.72.62 0:0:0:0:0:ffff:7927:483e
121.39.72.63 0:0:0:0:0:ffff:7927:483f
121.39.72.64 0:0:0:0:0:ffff:7927:4840
121.39.72.65 0:0:0:0:0:ffff:7927:4841
121.39.72.66 0:0:0:0:0:ffff:7927:4842
121.39.72.67 0:0:0:0:0:ffff:7927:4843
121.39.72.68 0:0:0:0:0:ffff:7927:4844
121.39.72.69 0:0:0:0:0:ffff:7927:4845
121.39.72.70 0:0:0:0:0:ffff:7927:4846
121.39.72.71 0:0:0:0:0:ffff:7927:4847
121.39.72.72 0:0:0:0:0:ffff:7927:4848
121.39.72.73 0:0:0:0:0:ffff:7927:4849
121.39.72.74 0:0:0:0:0:ffff:7927:484a
121.39.72.75 0:0:0:0:0:ffff:7927:484b
121.39.72.76 0:0:0:0:0:ffff:7927:484c
121.39.72.77 0:0:0:0:0:ffff:7927:484d
121.39.72.78 0:0:0:0:0:ffff:7927:484e
121.39.72.79 0:0:0:0:0:ffff:7927:484f
121.39.72.80 0:0:0:0:0:ffff:7927:4850
121.39.72.81 0:0:0:0:0:ffff:7927:4851
121.39.72.82 0:0:0:0:0:ffff:7927:4852
121.39.72.83 0:0:0:0:0:ffff:7927:4853
121.39.72.84 0:0:0:0:0:ffff:7927:4854
121.39.72.85 0:0:0:0:0:ffff:7927:4855
121.39.72.86 0:0:0:0:0:ffff:7927:4856
121.39.72.87 0:0:0:0:0:ffff:7927:4857
121.39.72.88 0:0:0:0:0:ffff:7927:4858
121.39.72.89 0:0:0:0:0:ffff:7927:4859
121.39.72.90 0:0:0:0:0:ffff:7927:485a
121.39.72.91 0:0:0:0:0:ffff:7927:485b
121.39.72.92 0:0:0:0:0:ffff:7927:485c
121.39.72.93 0:0:0:0:0:ffff:7927:485d
121.39.72.94 0:0:0:0:0:ffff:7927:485e
121.39.72.95 0:0:0:0:0:ffff:7927:485f
121.39.72.96 0:0:0:0:0:ffff:7927:4860
121.39.72.97 0:0:0:0:0:ffff:7927:4861
121.39.72.98 0:0:0:0:0:ffff:7927:4862
121.39.72.99 0:0:0:0:0:ffff:7927:4863
121.39.72.100 0:0:0:0:0:ffff:7927:4864
121.39.72.101 0:0:0:0:0:ffff:7927:4865
121.39.72.102 0:0:0:0:0:ffff:7927:4866
121.39.72.103 0:0:0:0:0:ffff:7927:4867
121.39.72.104 0:0:0:0:0:ffff:7927:4868
121.39.72.105 0:0:0:0:0:ffff:7927:4869
121.39.72.106 0:0:0:0:0:ffff:7927:486a
121.39.72.107 0:0:0:0:0:ffff:7927:486b
121.39.72.108 0:0:0:0:0:ffff:7927:486c
121.39.72.109 0:0:0:0:0:ffff:7927:486d
121.39.72.110 0:0:0:0:0:ffff:7927:486e
121.39.72.111 0:0:0:0:0:ffff:7927:486f
121.39.72.112 0:0:0:0:0:ffff:7927:4870
121.39.72.113 0:0:0:0:0:ffff:7927:4871
121.39.72.114 0:0:0:0:0:ffff:7927:4872
121.39.72.115 0:0:0:0:0:ffff:7927:4873
121.39.72.116 0:0:0:0:0:ffff:7927:4874
121.39.72.117 0:0:0:0:0:ffff:7927:4875
121.39.72.118 0:0:0:0:0:ffff:7927:4876
121.39.72.119 0:0:0:0:0:ffff:7927:4877
121.39.72.120 0:0:0:0:0:ffff:7927:4878


121.39.72.121 0:0:0:0:0:ffff:7927:4879
121.39.72.122 0:0:0:0:0:ffff:7927:487a
121.39.72.123 0:0:0:0:0:ffff:7927:487b
121.39.72.124 0:0:0:0:0:ffff:7927:487c
121.39.72.125 0:0:0:0:0:ffff:7927:487d
121.39.72.126 0:0:0:0:0:ffff:7927:487e
121.39.72.127 0:0:0:0:0:ffff:7927:487f
121.39.72.128 0:0:0:0:0:ffff:7927:4880
121.39.72.129 0:0:0:0:0:ffff:7927:4881
121.39.72.130 0:0:0:0:0:ffff:7927:4882
121.39.72.131 0:0:0:0:0:ffff:7927:4883
121.39.72.132 0:0:0:0:0:ffff:7927:4884
121.39.72.133 0:0:0:0:0:ffff:7927:4885
121.39.72.134 0:0:0:0:0:ffff:7927:4886
121.39.72.135 0:0:0:0:0:ffff:7927:4887
121.39.72.136 0:0:0:0:0:ffff:7927:4888
121.39.72.137 0:0:0:0:0:ffff:7927:4889
121.39.72.138 0:0:0:0:0:ffff:7927:488a
121.39.72.139 0:0:0:0:0:ffff:7927:488b
121.39.72.140 0:0:0:0:0:ffff:7927:488c
121.39.72.141 0:0:0:0:0:ffff:7927:488d
121.39.72.142 0:0:0:0:0:ffff:7927:488e
121.39.72.143 0:0:0:0:0:ffff:7927:488f
121.39.72.144 0:0:0:0:0:ffff:7927:4890
121.39.72.145 0:0:0:0:0:ffff:7927:4891
121.39.72.146 0:0:0:0:0:ffff:7927:4892
121.39.72.147 0:0:0:0:0:ffff:7927:4893
121.39.72.148 0:0:0:0:0:ffff:7927:4894
121.39.72.149 0:0:0:0:0:ffff:7927:4895
121.39.72.150 0:0:0:0:0:ffff:7927:4896
121.39.72.151 0:0:0:0:0:ffff:7927:4897
121.39.72.152 0:0:0:0:0:ffff:7927:4898
121.39.72.153 0:0:0:0:0:ffff:7927:4899
121.39.72.154 0:0:0:0:0:ffff:7927:489a
121.39.72.155 0:0:0:0:0:ffff:7927:489b
121.39.72.156 0:0:0:0:0:ffff:7927:489c
121.39.72.157 0:0:0:0:0:ffff:7927:489d
121.39.72.158 0:0:0:0:0:ffff:7927:489e
121.39.72.159 0:0:0:0:0:ffff:7927:489f
121.39.72.160 0:0:0:0:0:ffff:7927:48a0
121.39.72.161 0:0:0:0:0:ffff:7927:48a1
121.39.72.162 0:0:0:0:0:ffff:7927:48a2
121.39.72.163 0:0:0:0:0:ffff:7927:48a3
121.39.72.164 0:0:0:0:0:ffff:7927:48a4
121.39.72.165 0:0:0:0:0:ffff:7927:48a5
121.39.72.166 0:0:0:0:0:ffff:7927:48a6
121.39.72.167 0:0:0:0:0:ffff:7927:48a7
121.39.72.168 0:0:0:0:0:ffff:7927:48a8
121.39.72.169 0:0:0:0:0:ffff:7927:48a9
121.39.72.170 0:0:0:0:0:ffff:7927:48aa
121.39.72.171 0:0:0:0:0:ffff:7927:48ab
121.39.72.172 0:0:0:0:0:ffff:7927:48ac
121.39.72.173 0:0:0:0:0:ffff:7927:48ad
121.39.72.174 0:0:0:0:0:ffff:7927:48ae
121.39.72.175 0:0:0:0:0:ffff:7927:48af
121.39.72.176 0:0:0:0:0:ffff:7927:48b0
121.39.72.177 0:0:0:0:0:ffff:7927:48b1
121.39.72.178 0:0:0:0:0:ffff:7927:48b2
121.39.72.179 0:0:0:0:0:ffff:7927:48b3
121.39.72.180 0:0:0:0:0:ffff:7927:48b4


121.39.72.181 0:0:0:0:0:ffff:7927:48b5
121.39.72.182 0:0:0:0:0:ffff:7927:48b6
121.39.72.183 0:0:0:0:0:ffff:7927:48b7
121.39.72.184 0:0:0:0:0:ffff:7927:48b8
121.39.72.185 0:0:0:0:0:ffff:7927:48b9
121.39.72.186 0:0:0:0:0:ffff:7927:48ba
121.39.72.187 0:0:0:0:0:ffff:7927:48bb
121.39.72.188 0:0:0:0:0:ffff:7927:48bc
121.39.72.189 0:0:0:0:0:ffff:7927:48bd
121.39.72.190 0:0:0:0:0:ffff:7927:48be
121.39.72.191 0:0:0:0:0:ffff:7927:48bf
121.39.72.192 0:0:0:0:0:ffff:7927:48c0
121.39.72.193 0:0:0:0:0:ffff:7927:48c1
121.39.72.194 0:0:0:0:0:ffff:7927:48c2
121.39.72.195 0:0:0:0:0:ffff:7927:48c3
121.39.72.196 0:0:0:0:0:ffff:7927:48c4
121.39.72.197 0:0:0:0:0:ffff:7927:48c5
121.39.72.198 0:0:0:0:0:ffff:7927:48c6
121.39.72.199 0:0:0:0:0:ffff:7927:48c7
121.39.72.200 0:0:0:0:0:ffff:7927:48c8
121.39.72.201 0:0:0:0:0:ffff:7927:48c9
121.39.72.202 0:0:0:0:0:ffff:7927:48ca
121.39.72.203 0:0:0:0:0:ffff:7927:48cb
121.39.72.204 0:0:0:0:0:ffff:7927:48cc
121.39.72.205 0:0:0:0:0:ffff:7927:48cd
121.39.72.206 0:0:0:0:0:ffff:7927:48ce
121.39.72.207 0:0:0:0:0:ffff:7927:48cf
121.39.72.208 0:0:0:0:0:ffff:7927:48d0
121.39.72.209 0:0:0:0:0:ffff:7927:48d1
121.39.72.210 0:0:0:0:0:ffff:7927:48d2
121.39.72.211 0:0:0:0:0:ffff:7927:48d3
121.39.72.212 0:0:0:0:0:ffff:7927:48d4
121.39.72.213 0:0:0:0:0:ffff:7927:48d5
121.39.72.214 0:0:0:0:0:ffff:7927:48d6
121.39.72.215 0:0:0:0:0:ffff:7927:48d7
121.39.72.216 0:0:0:0:0:ffff:7927:48d8
121.39.72.217 0:0:0:0:0:ffff:7927:48d9
121.39.72.218 0:0:0:0:0:ffff:7927:48da
121.39.72.219 0:0:0:0:0:ffff:7927:48db
121.39.72.220 0:0:0:0:0:ffff:7927:48dc
121.39.72.221 0:0:0:0:0:ffff:7927:48dd
121.39.72.222 0:0:0:0:0:ffff:7927:48de
121.39.72.223 0:0:0:0:0:ffff:7927:48df
121.39.72.224 0:0:0:0:0:ffff:7927:48e0
121.39.72.225 0:0:0:0:0:ffff:7927:48e1
121.39.72.226 0:0:0:0:0:ffff:7927:48e2
121.39.72.227 0:0:0:0:0:ffff:7927:48e3
121.39.72.228 0:0:0:0:0:ffff:7927:48e4
121.39.72.229 0:0:0:0:0:ffff:7927:48e5
121.39.72.230 0:0:0:0:0:ffff:7927:48e6
121.39.72.231 0:0:0:0:0:ffff:7927:48e7
121.39.72.232 0:0:0:0:0:ffff:7927:48e8
121.39.72.233 0:0:0:0:0:ffff:7927:48e9
121.39.72.234 0:0:0:0:0:ffff:7927:48ea
121.39.72.235 0:0:0:0:0:ffff:7927:48eb
121.39.72.236 0:0:0:0:0:ffff:7927:48ec
121.39.72.237 0:0:0:0:0:ffff:7927:48ed
121.39.72.238 0:0:0:0:0:ffff:7927:48ee
121.39.72.239 0:0:0:0:0:ffff:7927:48ef
121.39.72.240 0:0:0:0:0:ffff:7927:48f0
121.39.72.241 0:0:0:0:0:ffff:7927:48f1
121.39.72.242 0:0:0:0:0:ffff:7927:48f2
121.39.72.243 0:0:0:0:0:ffff:7927:48f3
121.39.72.244 0:0:0:0:0:ffff:7927:48f4
121.39.72.245 0:0:0:0:0:ffff:7927:48f5
121.39.72.246 0:0:0:0:0:ffff:7927:48f6
121.39.72.247 0:0:0:0:0:ffff:7927:48f7
121.39.72.248 0:0:0:0:0:ffff:7927:48f8
121.39.72.249 0:0:0:0:0:ffff:7927:48f9
121.39.72.250 0:0:0:0:0:ffff:7927:48fa
121.39.72.251 0:0:0:0:0:ffff:7927:48fb
121.39.72.252 0:0:0:0:0:ffff:7927:48fc
121.39.72.253 0:0:0:0:0:ffff:7927:48fd
121.39.72.254 0:0:0:0:0:ffff:7927:48fe
121.39.72.255 0:0:0:0:0:ffff:7927:48ff


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.