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
65.121.215.1 0:0:0:0:0:ffff:4179:d701
65.121.215.2 0:0:0:0:0:ffff:4179:d702
65.121.215.3 0:0:0:0:0:ffff:4179:d703
65.121.215.4 0:0:0:0:0:ffff:4179:d704
65.121.215.5 0:0:0:0:0:ffff:4179:d705
65.121.215.6 0:0:0:0:0:ffff:4179:d706
65.121.215.7 0:0:0:0:0:ffff:4179:d707
65.121.215.8 0:0:0:0:0:ffff:4179:d708
65.121.215.9 0:0:0:0:0:ffff:4179:d709
65.121.215.10 0:0:0:0:0:ffff:4179:d70a
65.121.215.11 0:0:0:0:0:ffff:4179:d70b
65.121.215.12 0:0:0:0:0:ffff:4179:d70c
65.121.215.13 0:0:0:0:0:ffff:4179:d70d
65.121.215.14 0:0:0:0:0:ffff:4179:d70e
65.121.215.15 0:0:0:0:0:ffff:4179:d70f
65.121.215.16 0:0:0:0:0:ffff:4179:d710
65.121.215.17 0:0:0:0:0:ffff:4179:d711
65.121.215.18 0:0:0:0:0:ffff:4179:d712
65.121.215.19 0:0:0:0:0:ffff:4179:d713
65.121.215.20 0:0:0:0:0:ffff:4179:d714
65.121.215.21 0:0:0:0:0:ffff:4179:d715
65.121.215.22 0:0:0:0:0:ffff:4179:d716
65.121.215.23 0:0:0:0:0:ffff:4179:d717
65.121.215.24 0:0:0:0:0:ffff:4179:d718
65.121.215.25 0:0:0:0:0:ffff:4179:d719
65.121.215.26 0:0:0:0:0:ffff:4179:d71a
65.121.215.27 0:0:0:0:0:ffff:4179:d71b
65.121.215.28 0:0:0:0:0:ffff:4179:d71c
65.121.215.29 0:0:0:0:0:ffff:4179:d71d
65.121.215.30 0:0:0:0:0:ffff:4179:d71e
65.121.215.31 0:0:0:0:0:ffff:4179:d71f
65.121.215.32 0:0:0:0:0:ffff:4179:d720
65.121.215.33 0:0:0:0:0:ffff:4179:d721
65.121.215.34 0:0:0:0:0:ffff:4179:d722
65.121.215.35 0:0:0:0:0:ffff:4179:d723
65.121.215.36 0:0:0:0:0:ffff:4179:d724
65.121.215.37 0:0:0:0:0:ffff:4179:d725
65.121.215.38 0:0:0:0:0:ffff:4179:d726
65.121.215.39 0:0:0:0:0:ffff:4179:d727
65.121.215.40 0:0:0:0:0:ffff:4179:d728
65.121.215.41 0:0:0:0:0:ffff:4179:d729
65.121.215.42 0:0:0:0:0:ffff:4179:d72a
65.121.215.43 0:0:0:0:0:ffff:4179:d72b
65.121.215.44 0:0:0:0:0:ffff:4179:d72c
65.121.215.45 0:0:0:0:0:ffff:4179:d72d
65.121.215.46 0:0:0:0:0:ffff:4179:d72e
65.121.215.47 0:0:0:0:0:ffff:4179:d72f
65.121.215.48 0:0:0:0:0:ffff:4179:d730
65.121.215.49 0:0:0:0:0:ffff:4179:d731
65.121.215.50 0:0:0:0:0:ffff:4179:d732
65.121.215.51 0:0:0:0:0:ffff:4179:d733
65.121.215.52 0:0:0:0:0:ffff:4179:d734
65.121.215.53 0:0:0:0:0:ffff:4179:d735
65.121.215.54 0:0:0:0:0:ffff:4179:d736
65.121.215.55 0:0:0:0:0:ffff:4179:d737
65.121.215.56 0:0:0:0:0:ffff:4179:d738
65.121.215.57 0:0:0:0:0:ffff:4179:d739
65.121.215.58 0:0:0:0:0:ffff:4179:d73a
65.121.215.59 0:0:0:0:0:ffff:4179:d73b
65.121.215.60 0:0:0:0:0:ffff:4179:d73c


65.121.215.61 0:0:0:0:0:ffff:4179:d73d
65.121.215.62 0:0:0:0:0:ffff:4179:d73e
65.121.215.63 0:0:0:0:0:ffff:4179:d73f
65.121.215.64 0:0:0:0:0:ffff:4179:d740
65.121.215.65 0:0:0:0:0:ffff:4179:d741
65.121.215.66 0:0:0:0:0:ffff:4179:d742
65.121.215.67 0:0:0:0:0:ffff:4179:d743
65.121.215.68 0:0:0:0:0:ffff:4179:d744
65.121.215.69 0:0:0:0:0:ffff:4179:d745
65.121.215.70 0:0:0:0:0:ffff:4179:d746
65.121.215.71 0:0:0:0:0:ffff:4179:d747
65.121.215.72 0:0:0:0:0:ffff:4179:d748
65.121.215.73 0:0:0:0:0:ffff:4179:d749
65.121.215.74 0:0:0:0:0:ffff:4179:d74a
65.121.215.75 0:0:0:0:0:ffff:4179:d74b
65.121.215.76 0:0:0:0:0:ffff:4179:d74c
65.121.215.77 0:0:0:0:0:ffff:4179:d74d
65.121.215.78 0:0:0:0:0:ffff:4179:d74e
65.121.215.79 0:0:0:0:0:ffff:4179:d74f
65.121.215.80 0:0:0:0:0:ffff:4179:d750
65.121.215.81 0:0:0:0:0:ffff:4179:d751
65.121.215.82 0:0:0:0:0:ffff:4179:d752
65.121.215.83 0:0:0:0:0:ffff:4179:d753
65.121.215.84 0:0:0:0:0:ffff:4179:d754
65.121.215.85 0:0:0:0:0:ffff:4179:d755
65.121.215.86 0:0:0:0:0:ffff:4179:d756
65.121.215.87 0:0:0:0:0:ffff:4179:d757
65.121.215.88 0:0:0:0:0:ffff:4179:d758
65.121.215.89 0:0:0:0:0:ffff:4179:d759
65.121.215.90 0:0:0:0:0:ffff:4179:d75a
65.121.215.91 0:0:0:0:0:ffff:4179:d75b
65.121.215.92 0:0:0:0:0:ffff:4179:d75c
65.121.215.93 0:0:0:0:0:ffff:4179:d75d
65.121.215.94 0:0:0:0:0:ffff:4179:d75e
65.121.215.95 0:0:0:0:0:ffff:4179:d75f
65.121.215.96 0:0:0:0:0:ffff:4179:d760
65.121.215.97 0:0:0:0:0:ffff:4179:d761
65.121.215.98 0:0:0:0:0:ffff:4179:d762
65.121.215.99 0:0:0:0:0:ffff:4179:d763
65.121.215.100 0:0:0:0:0:ffff:4179:d764
65.121.215.101 0:0:0:0:0:ffff:4179:d765
65.121.215.102 0:0:0:0:0:ffff:4179:d766
65.121.215.103 0:0:0:0:0:ffff:4179:d767
65.121.215.104 0:0:0:0:0:ffff:4179:d768
65.121.215.105 0:0:0:0:0:ffff:4179:d769
65.121.215.106 0:0:0:0:0:ffff:4179:d76a
65.121.215.107 0:0:0:0:0:ffff:4179:d76b
65.121.215.108 0:0:0:0:0:ffff:4179:d76c
65.121.215.109 0:0:0:0:0:ffff:4179:d76d
65.121.215.110 0:0:0:0:0:ffff:4179:d76e
65.121.215.111 0:0:0:0:0:ffff:4179:d76f
65.121.215.112 0:0:0:0:0:ffff:4179:d770
65.121.215.113 0:0:0:0:0:ffff:4179:d771
65.121.215.114 0:0:0:0:0:ffff:4179:d772
65.121.215.115 0:0:0:0:0:ffff:4179:d773
65.121.215.116 0:0:0:0:0:ffff:4179:d774
65.121.215.117 0:0:0:0:0:ffff:4179:d775
65.121.215.118 0:0:0:0:0:ffff:4179:d776
65.121.215.119 0:0:0:0:0:ffff:4179:d777
65.121.215.120 0:0:0:0:0:ffff:4179:d778


65.121.215.121 0:0:0:0:0:ffff:4179:d779
65.121.215.122 0:0:0:0:0:ffff:4179:d77a
65.121.215.123 0:0:0:0:0:ffff:4179:d77b
65.121.215.124 0:0:0:0:0:ffff:4179:d77c
65.121.215.125 0:0:0:0:0:ffff:4179:d77d
65.121.215.126 0:0:0:0:0:ffff:4179:d77e
65.121.215.127 0:0:0:0:0:ffff:4179:d77f
65.121.215.128 0:0:0:0:0:ffff:4179:d780
65.121.215.129 0:0:0:0:0:ffff:4179:d781
65.121.215.130 0:0:0:0:0:ffff:4179:d782
65.121.215.131 0:0:0:0:0:ffff:4179:d783
65.121.215.132 0:0:0:0:0:ffff:4179:d784
65.121.215.133 0:0:0:0:0:ffff:4179:d785
65.121.215.134 0:0:0:0:0:ffff:4179:d786
65.121.215.135 0:0:0:0:0:ffff:4179:d787
65.121.215.136 0:0:0:0:0:ffff:4179:d788
65.121.215.137 0:0:0:0:0:ffff:4179:d789
65.121.215.138 0:0:0:0:0:ffff:4179:d78a
65.121.215.139 0:0:0:0:0:ffff:4179:d78b
65.121.215.140 0:0:0:0:0:ffff:4179:d78c
65.121.215.141 0:0:0:0:0:ffff:4179:d78d
65.121.215.142 0:0:0:0:0:ffff:4179:d78e
65.121.215.143 0:0:0:0:0:ffff:4179:d78f
65.121.215.144 0:0:0:0:0:ffff:4179:d790
65.121.215.145 0:0:0:0:0:ffff:4179:d791
65.121.215.146 0:0:0:0:0:ffff:4179:d792
65.121.215.147 0:0:0:0:0:ffff:4179:d793
65.121.215.148 0:0:0:0:0:ffff:4179:d794
65.121.215.149 0:0:0:0:0:ffff:4179:d795
65.121.215.150 0:0:0:0:0:ffff:4179:d796
65.121.215.151 0:0:0:0:0:ffff:4179:d797
65.121.215.152 0:0:0:0:0:ffff:4179:d798
65.121.215.153 0:0:0:0:0:ffff:4179:d799
65.121.215.154 0:0:0:0:0:ffff:4179:d79a
65.121.215.155 0:0:0:0:0:ffff:4179:d79b
65.121.215.156 0:0:0:0:0:ffff:4179:d79c
65.121.215.157 0:0:0:0:0:ffff:4179:d79d
65.121.215.158 0:0:0:0:0:ffff:4179:d79e
65.121.215.159 0:0:0:0:0:ffff:4179:d79f
65.121.215.160 0:0:0:0:0:ffff:4179:d7a0
65.121.215.161 0:0:0:0:0:ffff:4179:d7a1
65.121.215.162 0:0:0:0:0:ffff:4179:d7a2
65.121.215.163 0:0:0:0:0:ffff:4179:d7a3
65.121.215.164 0:0:0:0:0:ffff:4179:d7a4
65.121.215.165 0:0:0:0:0:ffff:4179:d7a5
65.121.215.166 0:0:0:0:0:ffff:4179:d7a6
65.121.215.167 0:0:0:0:0:ffff:4179:d7a7
65.121.215.168 0:0:0:0:0:ffff:4179:d7a8
65.121.215.169 0:0:0:0:0:ffff:4179:d7a9
65.121.215.170 0:0:0:0:0:ffff:4179:d7aa
65.121.215.171 0:0:0:0:0:ffff:4179:d7ab
65.121.215.172 0:0:0:0:0:ffff:4179:d7ac
65.121.215.173 0:0:0:0:0:ffff:4179:d7ad
65.121.215.174 0:0:0:0:0:ffff:4179:d7ae
65.121.215.175 0:0:0:0:0:ffff:4179:d7af
65.121.215.176 0:0:0:0:0:ffff:4179:d7b0
65.121.215.177 0:0:0:0:0:ffff:4179:d7b1
65.121.215.178 0:0:0:0:0:ffff:4179:d7b2
65.121.215.179 0:0:0:0:0:ffff:4179:d7b3
65.121.215.180 0:0:0:0:0:ffff:4179:d7b4


65.121.215.181 0:0:0:0:0:ffff:4179:d7b5
65.121.215.182 0:0:0:0:0:ffff:4179:d7b6
65.121.215.183 0:0:0:0:0:ffff:4179:d7b7
65.121.215.184 0:0:0:0:0:ffff:4179:d7b8
65.121.215.185 0:0:0:0:0:ffff:4179:d7b9
65.121.215.186 0:0:0:0:0:ffff:4179:d7ba
65.121.215.187 0:0:0:0:0:ffff:4179:d7bb
65.121.215.188 0:0:0:0:0:ffff:4179:d7bc
65.121.215.189 0:0:0:0:0:ffff:4179:d7bd
65.121.215.190 0:0:0:0:0:ffff:4179:d7be
65.121.215.191 0:0:0:0:0:ffff:4179:d7bf
65.121.215.192 0:0:0:0:0:ffff:4179:d7c0
65.121.215.193 0:0:0:0:0:ffff:4179:d7c1
65.121.215.194 0:0:0:0:0:ffff:4179:d7c2
65.121.215.195 0:0:0:0:0:ffff:4179:d7c3
65.121.215.196 0:0:0:0:0:ffff:4179:d7c4
65.121.215.197 0:0:0:0:0:ffff:4179:d7c5
65.121.215.198 0:0:0:0:0:ffff:4179:d7c6
65.121.215.199 0:0:0:0:0:ffff:4179:d7c7
65.121.215.200 0:0:0:0:0:ffff:4179:d7c8
65.121.215.201 0:0:0:0:0:ffff:4179:d7c9
65.121.215.202 0:0:0:0:0:ffff:4179:d7ca
65.121.215.203 0:0:0:0:0:ffff:4179:d7cb
65.121.215.204 0:0:0:0:0:ffff:4179:d7cc
65.121.215.205 0:0:0:0:0:ffff:4179:d7cd
65.121.215.206 0:0:0:0:0:ffff:4179:d7ce
65.121.215.207 0:0:0:0:0:ffff:4179:d7cf
65.121.215.208 0:0:0:0:0:ffff:4179:d7d0
65.121.215.209 0:0:0:0:0:ffff:4179:d7d1
65.121.215.210 0:0:0:0:0:ffff:4179:d7d2
65.121.215.211 0:0:0:0:0:ffff:4179:d7d3
65.121.215.212 0:0:0:0:0:ffff:4179:d7d4
65.121.215.213 0:0:0:0:0:ffff:4179:d7d5
65.121.215.214 0:0:0:0:0:ffff:4179:d7d6
65.121.215.215 0:0:0:0:0:ffff:4179:d7d7
65.121.215.216 0:0:0:0:0:ffff:4179:d7d8
65.121.215.217 0:0:0:0:0:ffff:4179:d7d9
65.121.215.218 0:0:0:0:0:ffff:4179:d7da
65.121.215.219 0:0:0:0:0:ffff:4179:d7db
65.121.215.220 0:0:0:0:0:ffff:4179:d7dc
65.121.215.221 0:0:0:0:0:ffff:4179:d7dd
65.121.215.222 0:0:0:0:0:ffff:4179:d7de
65.121.215.223 0:0:0:0:0:ffff:4179:d7df
65.121.215.224 0:0:0:0:0:ffff:4179:d7e0
65.121.215.225 0:0:0:0:0:ffff:4179:d7e1
65.121.215.226 0:0:0:0:0:ffff:4179:d7e2
65.121.215.227 0:0:0:0:0:ffff:4179:d7e3
65.121.215.228 0:0:0:0:0:ffff:4179:d7e4
65.121.215.229 0:0:0:0:0:ffff:4179:d7e5
65.121.215.230 0:0:0:0:0:ffff:4179:d7e6
65.121.215.231 0:0:0:0:0:ffff:4179:d7e7
65.121.215.232 0:0:0:0:0:ffff:4179:d7e8
65.121.215.233 0:0:0:0:0:ffff:4179:d7e9
65.121.215.234 0:0:0:0:0:ffff:4179:d7ea
65.121.215.235 0:0:0:0:0:ffff:4179:d7eb
65.121.215.236 0:0:0:0:0:ffff:4179:d7ec
65.121.215.237 0:0:0:0:0:ffff:4179:d7ed
65.121.215.238 0:0:0:0:0:ffff:4179:d7ee
65.121.215.239 0:0:0:0:0:ffff:4179:d7ef
65.121.215.240 0:0:0:0:0:ffff:4179:d7f0
65.121.215.241 0:0:0:0:0:ffff:4179:d7f1
65.121.215.242 0:0:0:0:0:ffff:4179:d7f2
65.121.215.243 0:0:0:0:0:ffff:4179:d7f3
65.121.215.244 0:0:0:0:0:ffff:4179:d7f4
65.121.215.245 0:0:0:0:0:ffff:4179:d7f5
65.121.215.246 0:0:0:0:0:ffff:4179:d7f6
65.121.215.247 0:0:0:0:0:ffff:4179:d7f7
65.121.215.248 0:0:0:0:0:ffff:4179:d7f8
65.121.215.249 0:0:0:0:0:ffff:4179:d7f9
65.121.215.250 0:0:0:0:0:ffff:4179:d7fa
65.121.215.251 0:0:0:0:0:ffff:4179:d7fb
65.121.215.252 0:0:0:0:0:ffff:4179:d7fc
65.121.215.253 0:0:0:0:0:ffff:4179:d7fd
65.121.215.254 0:0:0:0:0:ffff:4179:d7fe
65.121.215.255 0:0:0:0:0:ffff:4179:d7ff


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.