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
65.121.198.1 0:0:0:0:0:ffff:4179:c601
65.121.198.2 0:0:0:0:0:ffff:4179:c602
65.121.198.3 0:0:0:0:0:ffff:4179:c603
65.121.198.4 0:0:0:0:0:ffff:4179:c604
65.121.198.5 0:0:0:0:0:ffff:4179:c605
65.121.198.6 0:0:0:0:0:ffff:4179:c606
65.121.198.7 0:0:0:0:0:ffff:4179:c607
65.121.198.8 0:0:0:0:0:ffff:4179:c608
65.121.198.9 0:0:0:0:0:ffff:4179:c609
65.121.198.10 0:0:0:0:0:ffff:4179:c60a
65.121.198.11 0:0:0:0:0:ffff:4179:c60b
65.121.198.12 0:0:0:0:0:ffff:4179:c60c
65.121.198.13 0:0:0:0:0:ffff:4179:c60d
65.121.198.14 0:0:0:0:0:ffff:4179:c60e
65.121.198.15 0:0:0:0:0:ffff:4179:c60f
65.121.198.16 0:0:0:0:0:ffff:4179:c610
65.121.198.17 0:0:0:0:0:ffff:4179:c611
65.121.198.18 0:0:0:0:0:ffff:4179:c612
65.121.198.19 0:0:0:0:0:ffff:4179:c613
65.121.198.20 0:0:0:0:0:ffff:4179:c614
65.121.198.21 0:0:0:0:0:ffff:4179:c615
65.121.198.22 0:0:0:0:0:ffff:4179:c616
65.121.198.23 0:0:0:0:0:ffff:4179:c617
65.121.198.24 0:0:0:0:0:ffff:4179:c618
65.121.198.25 0:0:0:0:0:ffff:4179:c619
65.121.198.26 0:0:0:0:0:ffff:4179:c61a
65.121.198.27 0:0:0:0:0:ffff:4179:c61b
65.121.198.28 0:0:0:0:0:ffff:4179:c61c
65.121.198.29 0:0:0:0:0:ffff:4179:c61d
65.121.198.30 0:0:0:0:0:ffff:4179:c61e
65.121.198.31 0:0:0:0:0:ffff:4179:c61f
65.121.198.32 0:0:0:0:0:ffff:4179:c620
65.121.198.33 0:0:0:0:0:ffff:4179:c621
65.121.198.34 0:0:0:0:0:ffff:4179:c622
65.121.198.35 0:0:0:0:0:ffff:4179:c623
65.121.198.36 0:0:0:0:0:ffff:4179:c624
65.121.198.37 0:0:0:0:0:ffff:4179:c625
65.121.198.38 0:0:0:0:0:ffff:4179:c626
65.121.198.39 0:0:0:0:0:ffff:4179:c627
65.121.198.40 0:0:0:0:0:ffff:4179:c628
65.121.198.41 0:0:0:0:0:ffff:4179:c629
65.121.198.42 0:0:0:0:0:ffff:4179:c62a
65.121.198.43 0:0:0:0:0:ffff:4179:c62b
65.121.198.44 0:0:0:0:0:ffff:4179:c62c
65.121.198.45 0:0:0:0:0:ffff:4179:c62d
65.121.198.46 0:0:0:0:0:ffff:4179:c62e
65.121.198.47 0:0:0:0:0:ffff:4179:c62f
65.121.198.48 0:0:0:0:0:ffff:4179:c630
65.121.198.49 0:0:0:0:0:ffff:4179:c631
65.121.198.50 0:0:0:0:0:ffff:4179:c632
65.121.198.51 0:0:0:0:0:ffff:4179:c633
65.121.198.52 0:0:0:0:0:ffff:4179:c634
65.121.198.53 0:0:0:0:0:ffff:4179:c635
65.121.198.54 0:0:0:0:0:ffff:4179:c636
65.121.198.55 0:0:0:0:0:ffff:4179:c637
65.121.198.56 0:0:0:0:0:ffff:4179:c638
65.121.198.57 0:0:0:0:0:ffff:4179:c639
65.121.198.58 0:0:0:0:0:ffff:4179:c63a
65.121.198.59 0:0:0:0:0:ffff:4179:c63b
65.121.198.60 0:0:0:0:0:ffff:4179:c63c


65.121.198.61 0:0:0:0:0:ffff:4179:c63d
65.121.198.62 0:0:0:0:0:ffff:4179:c63e
65.121.198.63 0:0:0:0:0:ffff:4179:c63f
65.121.198.64 0:0:0:0:0:ffff:4179:c640
65.121.198.65 0:0:0:0:0:ffff:4179:c641
65.121.198.66 0:0:0:0:0:ffff:4179:c642
65.121.198.67 0:0:0:0:0:ffff:4179:c643
65.121.198.68 0:0:0:0:0:ffff:4179:c644
65.121.198.69 0:0:0:0:0:ffff:4179:c645
65.121.198.70 0:0:0:0:0:ffff:4179:c646
65.121.198.71 0:0:0:0:0:ffff:4179:c647
65.121.198.72 0:0:0:0:0:ffff:4179:c648
65.121.198.73 0:0:0:0:0:ffff:4179:c649
65.121.198.74 0:0:0:0:0:ffff:4179:c64a
65.121.198.75 0:0:0:0:0:ffff:4179:c64b
65.121.198.76 0:0:0:0:0:ffff:4179:c64c
65.121.198.77 0:0:0:0:0:ffff:4179:c64d
65.121.198.78 0:0:0:0:0:ffff:4179:c64e
65.121.198.79 0:0:0:0:0:ffff:4179:c64f
65.121.198.80 0:0:0:0:0:ffff:4179:c650
65.121.198.81 0:0:0:0:0:ffff:4179:c651
65.121.198.82 0:0:0:0:0:ffff:4179:c652
65.121.198.83 0:0:0:0:0:ffff:4179:c653
65.121.198.84 0:0:0:0:0:ffff:4179:c654
65.121.198.85 0:0:0:0:0:ffff:4179:c655
65.121.198.86 0:0:0:0:0:ffff:4179:c656
65.121.198.87 0:0:0:0:0:ffff:4179:c657
65.121.198.88 0:0:0:0:0:ffff:4179:c658
65.121.198.89 0:0:0:0:0:ffff:4179:c659
65.121.198.90 0:0:0:0:0:ffff:4179:c65a
65.121.198.91 0:0:0:0:0:ffff:4179:c65b
65.121.198.92 0:0:0:0:0:ffff:4179:c65c
65.121.198.93 0:0:0:0:0:ffff:4179:c65d
65.121.198.94 0:0:0:0:0:ffff:4179:c65e
65.121.198.95 0:0:0:0:0:ffff:4179:c65f
65.121.198.96 0:0:0:0:0:ffff:4179:c660
65.121.198.97 0:0:0:0:0:ffff:4179:c661
65.121.198.98 0:0:0:0:0:ffff:4179:c662
65.121.198.99 0:0:0:0:0:ffff:4179:c663
65.121.198.100 0:0:0:0:0:ffff:4179:c664
65.121.198.101 0:0:0:0:0:ffff:4179:c665
65.121.198.102 0:0:0:0:0:ffff:4179:c666
65.121.198.103 0:0:0:0:0:ffff:4179:c667
65.121.198.104 0:0:0:0:0:ffff:4179:c668
65.121.198.105 0:0:0:0:0:ffff:4179:c669
65.121.198.106 0:0:0:0:0:ffff:4179:c66a
65.121.198.107 0:0:0:0:0:ffff:4179:c66b
65.121.198.108 0:0:0:0:0:ffff:4179:c66c
65.121.198.109 0:0:0:0:0:ffff:4179:c66d
65.121.198.110 0:0:0:0:0:ffff:4179:c66e
65.121.198.111 0:0:0:0:0:ffff:4179:c66f
65.121.198.112 0:0:0:0:0:ffff:4179:c670
65.121.198.113 0:0:0:0:0:ffff:4179:c671
65.121.198.114 0:0:0:0:0:ffff:4179:c672
65.121.198.115 0:0:0:0:0:ffff:4179:c673
65.121.198.116 0:0:0:0:0:ffff:4179:c674
65.121.198.117 0:0:0:0:0:ffff:4179:c675
65.121.198.118 0:0:0:0:0:ffff:4179:c676
65.121.198.119 0:0:0:0:0:ffff:4179:c677
65.121.198.120 0:0:0:0:0:ffff:4179:c678


65.121.198.121 0:0:0:0:0:ffff:4179:c679
65.121.198.122 0:0:0:0:0:ffff:4179:c67a
65.121.198.123 0:0:0:0:0:ffff:4179:c67b
65.121.198.124 0:0:0:0:0:ffff:4179:c67c
65.121.198.125 0:0:0:0:0:ffff:4179:c67d
65.121.198.126 0:0:0:0:0:ffff:4179:c67e
65.121.198.127 0:0:0:0:0:ffff:4179:c67f
65.121.198.128 0:0:0:0:0:ffff:4179:c680
65.121.198.129 0:0:0:0:0:ffff:4179:c681
65.121.198.130 0:0:0:0:0:ffff:4179:c682
65.121.198.131 0:0:0:0:0:ffff:4179:c683
65.121.198.132 0:0:0:0:0:ffff:4179:c684
65.121.198.133 0:0:0:0:0:ffff:4179:c685
65.121.198.134 0:0:0:0:0:ffff:4179:c686
65.121.198.135 0:0:0:0:0:ffff:4179:c687
65.121.198.136 0:0:0:0:0:ffff:4179:c688
65.121.198.137 0:0:0:0:0:ffff:4179:c689
65.121.198.138 0:0:0:0:0:ffff:4179:c68a
65.121.198.139 0:0:0:0:0:ffff:4179:c68b
65.121.198.140 0:0:0:0:0:ffff:4179:c68c
65.121.198.141 0:0:0:0:0:ffff:4179:c68d
65.121.198.142 0:0:0:0:0:ffff:4179:c68e
65.121.198.143 0:0:0:0:0:ffff:4179:c68f
65.121.198.144 0:0:0:0:0:ffff:4179:c690
65.121.198.145 0:0:0:0:0:ffff:4179:c691
65.121.198.146 0:0:0:0:0:ffff:4179:c692
65.121.198.147 0:0:0:0:0:ffff:4179:c693
65.121.198.148 0:0:0:0:0:ffff:4179:c694
65.121.198.149 0:0:0:0:0:ffff:4179:c695
65.121.198.150 0:0:0:0:0:ffff:4179:c696
65.121.198.151 0:0:0:0:0:ffff:4179:c697
65.121.198.152 0:0:0:0:0:ffff:4179:c698
65.121.198.153 0:0:0:0:0:ffff:4179:c699
65.121.198.154 0:0:0:0:0:ffff:4179:c69a
65.121.198.155 0:0:0:0:0:ffff:4179:c69b
65.121.198.156 0:0:0:0:0:ffff:4179:c69c
65.121.198.157 0:0:0:0:0:ffff:4179:c69d
65.121.198.158 0:0:0:0:0:ffff:4179:c69e
65.121.198.159 0:0:0:0:0:ffff:4179:c69f
65.121.198.160 0:0:0:0:0:ffff:4179:c6a0
65.121.198.161 0:0:0:0:0:ffff:4179:c6a1
65.121.198.162 0:0:0:0:0:ffff:4179:c6a2
65.121.198.163 0:0:0:0:0:ffff:4179:c6a3
65.121.198.164 0:0:0:0:0:ffff:4179:c6a4
65.121.198.165 0:0:0:0:0:ffff:4179:c6a5
65.121.198.166 0:0:0:0:0:ffff:4179:c6a6
65.121.198.167 0:0:0:0:0:ffff:4179:c6a7
65.121.198.168 0:0:0:0:0:ffff:4179:c6a8
65.121.198.169 0:0:0:0:0:ffff:4179:c6a9
65.121.198.170 0:0:0:0:0:ffff:4179:c6aa
65.121.198.171 0:0:0:0:0:ffff:4179:c6ab
65.121.198.172 0:0:0:0:0:ffff:4179:c6ac
65.121.198.173 0:0:0:0:0:ffff:4179:c6ad
65.121.198.174 0:0:0:0:0:ffff:4179:c6ae
65.121.198.175 0:0:0:0:0:ffff:4179:c6af
65.121.198.176 0:0:0:0:0:ffff:4179:c6b0
65.121.198.177 0:0:0:0:0:ffff:4179:c6b1
65.121.198.178 0:0:0:0:0:ffff:4179:c6b2
65.121.198.179 0:0:0:0:0:ffff:4179:c6b3
65.121.198.180 0:0:0:0:0:ffff:4179:c6b4


65.121.198.181 0:0:0:0:0:ffff:4179:c6b5
65.121.198.182 0:0:0:0:0:ffff:4179:c6b6
65.121.198.183 0:0:0:0:0:ffff:4179:c6b7
65.121.198.184 0:0:0:0:0:ffff:4179:c6b8
65.121.198.185 0:0:0:0:0:ffff:4179:c6b9
65.121.198.186 0:0:0:0:0:ffff:4179:c6ba
65.121.198.187 0:0:0:0:0:ffff:4179:c6bb
65.121.198.188 0:0:0:0:0:ffff:4179:c6bc
65.121.198.189 0:0:0:0:0:ffff:4179:c6bd
65.121.198.190 0:0:0:0:0:ffff:4179:c6be
65.121.198.191 0:0:0:0:0:ffff:4179:c6bf
65.121.198.192 0:0:0:0:0:ffff:4179:c6c0
65.121.198.193 0:0:0:0:0:ffff:4179:c6c1
65.121.198.194 0:0:0:0:0:ffff:4179:c6c2
65.121.198.195 0:0:0:0:0:ffff:4179:c6c3
65.121.198.196 0:0:0:0:0:ffff:4179:c6c4
65.121.198.197 0:0:0:0:0:ffff:4179:c6c5
65.121.198.198 0:0:0:0:0:ffff:4179:c6c6
65.121.198.199 0:0:0:0:0:ffff:4179:c6c7
65.121.198.200 0:0:0:0:0:ffff:4179:c6c8
65.121.198.201 0:0:0:0:0:ffff:4179:c6c9
65.121.198.202 0:0:0:0:0:ffff:4179:c6ca
65.121.198.203 0:0:0:0:0:ffff:4179:c6cb
65.121.198.204 0:0:0:0:0:ffff:4179:c6cc
65.121.198.205 0:0:0:0:0:ffff:4179:c6cd
65.121.198.206 0:0:0:0:0:ffff:4179:c6ce
65.121.198.207 0:0:0:0:0:ffff:4179:c6cf
65.121.198.208 0:0:0:0:0:ffff:4179:c6d0
65.121.198.209 0:0:0:0:0:ffff:4179:c6d1
65.121.198.210 0:0:0:0:0:ffff:4179:c6d2
65.121.198.211 0:0:0:0:0:ffff:4179:c6d3
65.121.198.212 0:0:0:0:0:ffff:4179:c6d4
65.121.198.213 0:0:0:0:0:ffff:4179:c6d5
65.121.198.214 0:0:0:0:0:ffff:4179:c6d6
65.121.198.215 0:0:0:0:0:ffff:4179:c6d7
65.121.198.216 0:0:0:0:0:ffff:4179:c6d8
65.121.198.217 0:0:0:0:0:ffff:4179:c6d9
65.121.198.218 0:0:0:0:0:ffff:4179:c6da
65.121.198.219 0:0:0:0:0:ffff:4179:c6db
65.121.198.220 0:0:0:0:0:ffff:4179:c6dc
65.121.198.221 0:0:0:0:0:ffff:4179:c6dd
65.121.198.222 0:0:0:0:0:ffff:4179:c6de
65.121.198.223 0:0:0:0:0:ffff:4179:c6df
65.121.198.224 0:0:0:0:0:ffff:4179:c6e0
65.121.198.225 0:0:0:0:0:ffff:4179:c6e1
65.121.198.226 0:0:0:0:0:ffff:4179:c6e2
65.121.198.227 0:0:0:0:0:ffff:4179:c6e3
65.121.198.228 0:0:0:0:0:ffff:4179:c6e4
65.121.198.229 0:0:0:0:0:ffff:4179:c6e5
65.121.198.230 0:0:0:0:0:ffff:4179:c6e6
65.121.198.231 0:0:0:0:0:ffff:4179:c6e7
65.121.198.232 0:0:0:0:0:ffff:4179:c6e8
65.121.198.233 0:0:0:0:0:ffff:4179:c6e9
65.121.198.234 0:0:0:0:0:ffff:4179:c6ea
65.121.198.235 0:0:0:0:0:ffff:4179:c6eb
65.121.198.236 0:0:0:0:0:ffff:4179:c6ec
65.121.198.237 0:0:0:0:0:ffff:4179:c6ed
65.121.198.238 0:0:0:0:0:ffff:4179:c6ee
65.121.198.239 0:0:0:0:0:ffff:4179:c6ef
65.121.198.240 0:0:0:0:0:ffff:4179:c6f0
65.121.198.241 0:0:0:0:0:ffff:4179:c6f1
65.121.198.242 0:0:0:0:0:ffff:4179:c6f2
65.121.198.243 0:0:0:0:0:ffff:4179:c6f3
65.121.198.244 0:0:0:0:0:ffff:4179:c6f4
65.121.198.245 0:0:0:0:0:ffff:4179:c6f5
65.121.198.246 0:0:0:0:0:ffff:4179:c6f6
65.121.198.247 0:0:0:0:0:ffff:4179:c6f7
65.121.198.248 0:0:0:0:0:ffff:4179:c6f8
65.121.198.249 0:0:0:0:0:ffff:4179:c6f9
65.121.198.250 0:0:0:0:0:ffff:4179:c6fa
65.121.198.251 0:0:0:0:0:ffff:4179:c6fb
65.121.198.252 0:0:0:0:0:ffff:4179:c6fc
65.121.198.253 0:0:0:0:0:ffff:4179:c6fd
65.121.198.254 0:0:0:0:0:ffff:4179:c6fe
65.121.198.255 0:0:0:0:0:ffff:4179:c6ff


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.