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
66.19.72.1 0:0:0:0:0:ffff:4213:4801
66.19.72.2 0:0:0:0:0:ffff:4213:4802
66.19.72.3 0:0:0:0:0:ffff:4213:4803
66.19.72.4 0:0:0:0:0:ffff:4213:4804
66.19.72.5 0:0:0:0:0:ffff:4213:4805
66.19.72.6 0:0:0:0:0:ffff:4213:4806
66.19.72.7 0:0:0:0:0:ffff:4213:4807
66.19.72.8 0:0:0:0:0:ffff:4213:4808
66.19.72.9 0:0:0:0:0:ffff:4213:4809
66.19.72.10 0:0:0:0:0:ffff:4213:480a
66.19.72.11 0:0:0:0:0:ffff:4213:480b
66.19.72.12 0:0:0:0:0:ffff:4213:480c
66.19.72.13 0:0:0:0:0:ffff:4213:480d
66.19.72.14 0:0:0:0:0:ffff:4213:480e
66.19.72.15 0:0:0:0:0:ffff:4213:480f
66.19.72.16 0:0:0:0:0:ffff:4213:4810
66.19.72.17 0:0:0:0:0:ffff:4213:4811
66.19.72.18 0:0:0:0:0:ffff:4213:4812
66.19.72.19 0:0:0:0:0:ffff:4213:4813
66.19.72.20 0:0:0:0:0:ffff:4213:4814
66.19.72.21 0:0:0:0:0:ffff:4213:4815
66.19.72.22 0:0:0:0:0:ffff:4213:4816
66.19.72.23 0:0:0:0:0:ffff:4213:4817
66.19.72.24 0:0:0:0:0:ffff:4213:4818
66.19.72.25 0:0:0:0:0:ffff:4213:4819
66.19.72.26 0:0:0:0:0:ffff:4213:481a
66.19.72.27 0:0:0:0:0:ffff:4213:481b
66.19.72.28 0:0:0:0:0:ffff:4213:481c
66.19.72.29 0:0:0:0:0:ffff:4213:481d
66.19.72.30 0:0:0:0:0:ffff:4213:481e
66.19.72.31 0:0:0:0:0:ffff:4213:481f
66.19.72.32 0:0:0:0:0:ffff:4213:4820
66.19.72.33 0:0:0:0:0:ffff:4213:4821
66.19.72.34 0:0:0:0:0:ffff:4213:4822
66.19.72.35 0:0:0:0:0:ffff:4213:4823
66.19.72.36 0:0:0:0:0:ffff:4213:4824
66.19.72.37 0:0:0:0:0:ffff:4213:4825
66.19.72.38 0:0:0:0:0:ffff:4213:4826
66.19.72.39 0:0:0:0:0:ffff:4213:4827
66.19.72.40 0:0:0:0:0:ffff:4213:4828
66.19.72.41 0:0:0:0:0:ffff:4213:4829
66.19.72.42 0:0:0:0:0:ffff:4213:482a
66.19.72.43 0:0:0:0:0:ffff:4213:482b
66.19.72.44 0:0:0:0:0:ffff:4213:482c
66.19.72.45 0:0:0:0:0:ffff:4213:482d
66.19.72.46 0:0:0:0:0:ffff:4213:482e
66.19.72.47 0:0:0:0:0:ffff:4213:482f
66.19.72.48 0:0:0:0:0:ffff:4213:4830
66.19.72.49 0:0:0:0:0:ffff:4213:4831
66.19.72.50 0:0:0:0:0:ffff:4213:4832
66.19.72.51 0:0:0:0:0:ffff:4213:4833
66.19.72.52 0:0:0:0:0:ffff:4213:4834
66.19.72.53 0:0:0:0:0:ffff:4213:4835
66.19.72.54 0:0:0:0:0:ffff:4213:4836
66.19.72.55 0:0:0:0:0:ffff:4213:4837
66.19.72.56 0:0:0:0:0:ffff:4213:4838
66.19.72.57 0:0:0:0:0:ffff:4213:4839
66.19.72.58 0:0:0:0:0:ffff:4213:483a
66.19.72.59 0:0:0:0:0:ffff:4213:483b
66.19.72.60 0:0:0:0:0:ffff:4213:483c


66.19.72.61 0:0:0:0:0:ffff:4213:483d
66.19.72.62 0:0:0:0:0:ffff:4213:483e
66.19.72.63 0:0:0:0:0:ffff:4213:483f
66.19.72.64 0:0:0:0:0:ffff:4213:4840
66.19.72.65 0:0:0:0:0:ffff:4213:4841
66.19.72.66 0:0:0:0:0:ffff:4213:4842
66.19.72.67 0:0:0:0:0:ffff:4213:4843
66.19.72.68 0:0:0:0:0:ffff:4213:4844
66.19.72.69 0:0:0:0:0:ffff:4213:4845
66.19.72.70 0:0:0:0:0:ffff:4213:4846
66.19.72.71 0:0:0:0:0:ffff:4213:4847
66.19.72.72 0:0:0:0:0:ffff:4213:4848
66.19.72.73 0:0:0:0:0:ffff:4213:4849
66.19.72.74 0:0:0:0:0:ffff:4213:484a
66.19.72.75 0:0:0:0:0:ffff:4213:484b
66.19.72.76 0:0:0:0:0:ffff:4213:484c
66.19.72.77 0:0:0:0:0:ffff:4213:484d
66.19.72.78 0:0:0:0:0:ffff:4213:484e
66.19.72.79 0:0:0:0:0:ffff:4213:484f
66.19.72.80 0:0:0:0:0:ffff:4213:4850
66.19.72.81 0:0:0:0:0:ffff:4213:4851
66.19.72.82 0:0:0:0:0:ffff:4213:4852
66.19.72.83 0:0:0:0:0:ffff:4213:4853
66.19.72.84 0:0:0:0:0:ffff:4213:4854
66.19.72.85 0:0:0:0:0:ffff:4213:4855
66.19.72.86 0:0:0:0:0:ffff:4213:4856
66.19.72.87 0:0:0:0:0:ffff:4213:4857
66.19.72.88 0:0:0:0:0:ffff:4213:4858
66.19.72.89 0:0:0:0:0:ffff:4213:4859
66.19.72.90 0:0:0:0:0:ffff:4213:485a
66.19.72.91 0:0:0:0:0:ffff:4213:485b
66.19.72.92 0:0:0:0:0:ffff:4213:485c
66.19.72.93 0:0:0:0:0:ffff:4213:485d
66.19.72.94 0:0:0:0:0:ffff:4213:485e
66.19.72.95 0:0:0:0:0:ffff:4213:485f
66.19.72.96 0:0:0:0:0:ffff:4213:4860
66.19.72.97 0:0:0:0:0:ffff:4213:4861
66.19.72.98 0:0:0:0:0:ffff:4213:4862
66.19.72.99 0:0:0:0:0:ffff:4213:4863
66.19.72.100 0:0:0:0:0:ffff:4213:4864
66.19.72.101 0:0:0:0:0:ffff:4213:4865
66.19.72.102 0:0:0:0:0:ffff:4213:4866
66.19.72.103 0:0:0:0:0:ffff:4213:4867
66.19.72.104 0:0:0:0:0:ffff:4213:4868
66.19.72.105 0:0:0:0:0:ffff:4213:4869
66.19.72.106 0:0:0:0:0:ffff:4213:486a
66.19.72.107 0:0:0:0:0:ffff:4213:486b
66.19.72.108 0:0:0:0:0:ffff:4213:486c
66.19.72.109 0:0:0:0:0:ffff:4213:486d
66.19.72.110 0:0:0:0:0:ffff:4213:486e
66.19.72.111 0:0:0:0:0:ffff:4213:486f
66.19.72.112 0:0:0:0:0:ffff:4213:4870
66.19.72.113 0:0:0:0:0:ffff:4213:4871
66.19.72.114 0:0:0:0:0:ffff:4213:4872
66.19.72.115 0:0:0:0:0:ffff:4213:4873
66.19.72.116 0:0:0:0:0:ffff:4213:4874
66.19.72.117 0:0:0:0:0:ffff:4213:4875
66.19.72.118 0:0:0:0:0:ffff:4213:4876
66.19.72.119 0:0:0:0:0:ffff:4213:4877
66.19.72.120 0:0:0:0:0:ffff:4213:4878


66.19.72.121 0:0:0:0:0:ffff:4213:4879
66.19.72.122 0:0:0:0:0:ffff:4213:487a
66.19.72.123 0:0:0:0:0:ffff:4213:487b
66.19.72.124 0:0:0:0:0:ffff:4213:487c
66.19.72.125 0:0:0:0:0:ffff:4213:487d
66.19.72.126 0:0:0:0:0:ffff:4213:487e
66.19.72.127 0:0:0:0:0:ffff:4213:487f
66.19.72.128 0:0:0:0:0:ffff:4213:4880
66.19.72.129 0:0:0:0:0:ffff:4213:4881
66.19.72.130 0:0:0:0:0:ffff:4213:4882
66.19.72.131 0:0:0:0:0:ffff:4213:4883
66.19.72.132 0:0:0:0:0:ffff:4213:4884
66.19.72.133 0:0:0:0:0:ffff:4213:4885
66.19.72.134 0:0:0:0:0:ffff:4213:4886
66.19.72.135 0:0:0:0:0:ffff:4213:4887
66.19.72.136 0:0:0:0:0:ffff:4213:4888
66.19.72.137 0:0:0:0:0:ffff:4213:4889
66.19.72.138 0:0:0:0:0:ffff:4213:488a
66.19.72.139 0:0:0:0:0:ffff:4213:488b
66.19.72.140 0:0:0:0:0:ffff:4213:488c
66.19.72.141 0:0:0:0:0:ffff:4213:488d
66.19.72.142 0:0:0:0:0:ffff:4213:488e
66.19.72.143 0:0:0:0:0:ffff:4213:488f
66.19.72.144 0:0:0:0:0:ffff:4213:4890
66.19.72.145 0:0:0:0:0:ffff:4213:4891
66.19.72.146 0:0:0:0:0:ffff:4213:4892
66.19.72.147 0:0:0:0:0:ffff:4213:4893
66.19.72.148 0:0:0:0:0:ffff:4213:4894
66.19.72.149 0:0:0:0:0:ffff:4213:4895
66.19.72.150 0:0:0:0:0:ffff:4213:4896
66.19.72.151 0:0:0:0:0:ffff:4213:4897
66.19.72.152 0:0:0:0:0:ffff:4213:4898
66.19.72.153 0:0:0:0:0:ffff:4213:4899
66.19.72.154 0:0:0:0:0:ffff:4213:489a
66.19.72.155 0:0:0:0:0:ffff:4213:489b
66.19.72.156 0:0:0:0:0:ffff:4213:489c
66.19.72.157 0:0:0:0:0:ffff:4213:489d
66.19.72.158 0:0:0:0:0:ffff:4213:489e
66.19.72.159 0:0:0:0:0:ffff:4213:489f
66.19.72.160 0:0:0:0:0:ffff:4213:48a0
66.19.72.161 0:0:0:0:0:ffff:4213:48a1
66.19.72.162 0:0:0:0:0:ffff:4213:48a2
66.19.72.163 0:0:0:0:0:ffff:4213:48a3
66.19.72.164 0:0:0:0:0:ffff:4213:48a4
66.19.72.165 0:0:0:0:0:ffff:4213:48a5
66.19.72.166 0:0:0:0:0:ffff:4213:48a6
66.19.72.167 0:0:0:0:0:ffff:4213:48a7
66.19.72.168 0:0:0:0:0:ffff:4213:48a8
66.19.72.169 0:0:0:0:0:ffff:4213:48a9
66.19.72.170 0:0:0:0:0:ffff:4213:48aa
66.19.72.171 0:0:0:0:0:ffff:4213:48ab
66.19.72.172 0:0:0:0:0:ffff:4213:48ac
66.19.72.173 0:0:0:0:0:ffff:4213:48ad
66.19.72.174 0:0:0:0:0:ffff:4213:48ae
66.19.72.175 0:0:0:0:0:ffff:4213:48af
66.19.72.176 0:0:0:0:0:ffff:4213:48b0
66.19.72.177 0:0:0:0:0:ffff:4213:48b1
66.19.72.178 0:0:0:0:0:ffff:4213:48b2
66.19.72.179 0:0:0:0:0:ffff:4213:48b3
66.19.72.180 0:0:0:0:0:ffff:4213:48b4


66.19.72.181 0:0:0:0:0:ffff:4213:48b5
66.19.72.182 0:0:0:0:0:ffff:4213:48b6
66.19.72.183 0:0:0:0:0:ffff:4213:48b7
66.19.72.184 0:0:0:0:0:ffff:4213:48b8
66.19.72.185 0:0:0:0:0:ffff:4213:48b9
66.19.72.186 0:0:0:0:0:ffff:4213:48ba
66.19.72.187 0:0:0:0:0:ffff:4213:48bb
66.19.72.188 0:0:0:0:0:ffff:4213:48bc
66.19.72.189 0:0:0:0:0:ffff:4213:48bd
66.19.72.190 0:0:0:0:0:ffff:4213:48be
66.19.72.191 0:0:0:0:0:ffff:4213:48bf
66.19.72.192 0:0:0:0:0:ffff:4213:48c0
66.19.72.193 0:0:0:0:0:ffff:4213:48c1
66.19.72.194 0:0:0:0:0:ffff:4213:48c2
66.19.72.195 0:0:0:0:0:ffff:4213:48c3
66.19.72.196 0:0:0:0:0:ffff:4213:48c4
66.19.72.197 0:0:0:0:0:ffff:4213:48c5
66.19.72.198 0:0:0:0:0:ffff:4213:48c6
66.19.72.199 0:0:0:0:0:ffff:4213:48c7
66.19.72.200 0:0:0:0:0:ffff:4213:48c8
66.19.72.201 0:0:0:0:0:ffff:4213:48c9
66.19.72.202 0:0:0:0:0:ffff:4213:48ca
66.19.72.203 0:0:0:0:0:ffff:4213:48cb
66.19.72.204 0:0:0:0:0:ffff:4213:48cc
66.19.72.205 0:0:0:0:0:ffff:4213:48cd
66.19.72.206 0:0:0:0:0:ffff:4213:48ce
66.19.72.207 0:0:0:0:0:ffff:4213:48cf
66.19.72.208 0:0:0:0:0:ffff:4213:48d0
66.19.72.209 0:0:0:0:0:ffff:4213:48d1
66.19.72.210 0:0:0:0:0:ffff:4213:48d2
66.19.72.211 0:0:0:0:0:ffff:4213:48d3
66.19.72.212 0:0:0:0:0:ffff:4213:48d4
66.19.72.213 0:0:0:0:0:ffff:4213:48d5
66.19.72.214 0:0:0:0:0:ffff:4213:48d6
66.19.72.215 0:0:0:0:0:ffff:4213:48d7
66.19.72.216 0:0:0:0:0:ffff:4213:48d8
66.19.72.217 0:0:0:0:0:ffff:4213:48d9
66.19.72.218 0:0:0:0:0:ffff:4213:48da
66.19.72.219 0:0:0:0:0:ffff:4213:48db
66.19.72.220 0:0:0:0:0:ffff:4213:48dc
66.19.72.221 0:0:0:0:0:ffff:4213:48dd
66.19.72.222 0:0:0:0:0:ffff:4213:48de
66.19.72.223 0:0:0:0:0:ffff:4213:48df
66.19.72.224 0:0:0:0:0:ffff:4213:48e0
66.19.72.225 0:0:0:0:0:ffff:4213:48e1
66.19.72.226 0:0:0:0:0:ffff:4213:48e2
66.19.72.227 0:0:0:0:0:ffff:4213:48e3
66.19.72.228 0:0:0:0:0:ffff:4213:48e4
66.19.72.229 0:0:0:0:0:ffff:4213:48e5
66.19.72.230 0:0:0:0:0:ffff:4213:48e6
66.19.72.231 0:0:0:0:0:ffff:4213:48e7
66.19.72.232 0:0:0:0:0:ffff:4213:48e8
66.19.72.233 0:0:0:0:0:ffff:4213:48e9
66.19.72.234 0:0:0:0:0:ffff:4213:48ea
66.19.72.235 0:0:0:0:0:ffff:4213:48eb
66.19.72.236 0:0:0:0:0:ffff:4213:48ec
66.19.72.237 0:0:0:0:0:ffff:4213:48ed
66.19.72.238 0:0:0:0:0:ffff:4213:48ee
66.19.72.239 0:0:0:0:0:ffff:4213:48ef
66.19.72.240 0:0:0:0:0:ffff:4213:48f0
66.19.72.241 0:0:0:0:0:ffff:4213:48f1
66.19.72.242 0:0:0:0:0:ffff:4213:48f2
66.19.72.243 0:0:0:0:0:ffff:4213:48f3
66.19.72.244 0:0:0:0:0:ffff:4213:48f4
66.19.72.245 0:0:0:0:0:ffff:4213:48f5
66.19.72.246 0:0:0:0:0:ffff:4213:48f6
66.19.72.247 0:0:0:0:0:ffff:4213:48f7
66.19.72.248 0:0:0:0:0:ffff:4213:48f8
66.19.72.249 0:0:0:0:0:ffff:4213:48f9
66.19.72.250 0:0:0:0:0:ffff:4213:48fa
66.19.72.251 0:0:0:0:0:ffff:4213:48fb
66.19.72.252 0:0:0:0:0:ffff:4213:48fc
66.19.72.253 0:0:0:0:0:ffff:4213:48fd
66.19.72.254 0:0:0:0:0:ffff:4213:48fe
66.19.72.255 0:0:0:0:0:ffff:4213:48ff


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.