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
65.121.101.1 0:0:0:0:0:ffff:4179:6501
65.121.101.2 0:0:0:0:0:ffff:4179:6502
65.121.101.3 0:0:0:0:0:ffff:4179:6503
65.121.101.4 0:0:0:0:0:ffff:4179:6504
65.121.101.5 0:0:0:0:0:ffff:4179:6505
65.121.101.6 0:0:0:0:0:ffff:4179:6506
65.121.101.7 0:0:0:0:0:ffff:4179:6507
65.121.101.8 0:0:0:0:0:ffff:4179:6508
65.121.101.9 0:0:0:0:0:ffff:4179:6509
65.121.101.10 0:0:0:0:0:ffff:4179:650a
65.121.101.11 0:0:0:0:0:ffff:4179:650b
65.121.101.12 0:0:0:0:0:ffff:4179:650c
65.121.101.13 0:0:0:0:0:ffff:4179:650d
65.121.101.14 0:0:0:0:0:ffff:4179:650e
65.121.101.15 0:0:0:0:0:ffff:4179:650f
65.121.101.16 0:0:0:0:0:ffff:4179:6510
65.121.101.17 0:0:0:0:0:ffff:4179:6511
65.121.101.18 0:0:0:0:0:ffff:4179:6512
65.121.101.19 0:0:0:0:0:ffff:4179:6513
65.121.101.20 0:0:0:0:0:ffff:4179:6514
65.121.101.21 0:0:0:0:0:ffff:4179:6515
65.121.101.22 0:0:0:0:0:ffff:4179:6516
65.121.101.23 0:0:0:0:0:ffff:4179:6517
65.121.101.24 0:0:0:0:0:ffff:4179:6518
65.121.101.25 0:0:0:0:0:ffff:4179:6519
65.121.101.26 0:0:0:0:0:ffff:4179:651a
65.121.101.27 0:0:0:0:0:ffff:4179:651b
65.121.101.28 0:0:0:0:0:ffff:4179:651c
65.121.101.29 0:0:0:0:0:ffff:4179:651d
65.121.101.30 0:0:0:0:0:ffff:4179:651e
65.121.101.31 0:0:0:0:0:ffff:4179:651f
65.121.101.32 0:0:0:0:0:ffff:4179:6520
65.121.101.33 0:0:0:0:0:ffff:4179:6521
65.121.101.34 0:0:0:0:0:ffff:4179:6522
65.121.101.35 0:0:0:0:0:ffff:4179:6523
65.121.101.36 0:0:0:0:0:ffff:4179:6524
65.121.101.37 0:0:0:0:0:ffff:4179:6525
65.121.101.38 0:0:0:0:0:ffff:4179:6526
65.121.101.39 0:0:0:0:0:ffff:4179:6527
65.121.101.40 0:0:0:0:0:ffff:4179:6528
65.121.101.41 0:0:0:0:0:ffff:4179:6529
65.121.101.42 0:0:0:0:0:ffff:4179:652a
65.121.101.43 0:0:0:0:0:ffff:4179:652b
65.121.101.44 0:0:0:0:0:ffff:4179:652c
65.121.101.45 0:0:0:0:0:ffff:4179:652d
65.121.101.46 0:0:0:0:0:ffff:4179:652e
65.121.101.47 0:0:0:0:0:ffff:4179:652f
65.121.101.48 0:0:0:0:0:ffff:4179:6530
65.121.101.49 0:0:0:0:0:ffff:4179:6531
65.121.101.50 0:0:0:0:0:ffff:4179:6532
65.121.101.51 0:0:0:0:0:ffff:4179:6533
65.121.101.52 0:0:0:0:0:ffff:4179:6534
65.121.101.53 0:0:0:0:0:ffff:4179:6535
65.121.101.54 0:0:0:0:0:ffff:4179:6536
65.121.101.55 0:0:0:0:0:ffff:4179:6537
65.121.101.56 0:0:0:0:0:ffff:4179:6538
65.121.101.57 0:0:0:0:0:ffff:4179:6539
65.121.101.58 0:0:0:0:0:ffff:4179:653a
65.121.101.59 0:0:0:0:0:ffff:4179:653b
65.121.101.60 0:0:0:0:0:ffff:4179:653c


65.121.101.61 0:0:0:0:0:ffff:4179:653d
65.121.101.62 0:0:0:0:0:ffff:4179:653e
65.121.101.63 0:0:0:0:0:ffff:4179:653f
65.121.101.64 0:0:0:0:0:ffff:4179:6540
65.121.101.65 0:0:0:0:0:ffff:4179:6541
65.121.101.66 0:0:0:0:0:ffff:4179:6542
65.121.101.67 0:0:0:0:0:ffff:4179:6543
65.121.101.68 0:0:0:0:0:ffff:4179:6544
65.121.101.69 0:0:0:0:0:ffff:4179:6545
65.121.101.70 0:0:0:0:0:ffff:4179:6546
65.121.101.71 0:0:0:0:0:ffff:4179:6547
65.121.101.72 0:0:0:0:0:ffff:4179:6548
65.121.101.73 0:0:0:0:0:ffff:4179:6549
65.121.101.74 0:0:0:0:0:ffff:4179:654a
65.121.101.75 0:0:0:0:0:ffff:4179:654b
65.121.101.76 0:0:0:0:0:ffff:4179:654c
65.121.101.77 0:0:0:0:0:ffff:4179:654d
65.121.101.78 0:0:0:0:0:ffff:4179:654e
65.121.101.79 0:0:0:0:0:ffff:4179:654f
65.121.101.80 0:0:0:0:0:ffff:4179:6550
65.121.101.81 0:0:0:0:0:ffff:4179:6551
65.121.101.82 0:0:0:0:0:ffff:4179:6552
65.121.101.83 0:0:0:0:0:ffff:4179:6553
65.121.101.84 0:0:0:0:0:ffff:4179:6554
65.121.101.85 0:0:0:0:0:ffff:4179:6555
65.121.101.86 0:0:0:0:0:ffff:4179:6556
65.121.101.87 0:0:0:0:0:ffff:4179:6557
65.121.101.88 0:0:0:0:0:ffff:4179:6558
65.121.101.89 0:0:0:0:0:ffff:4179:6559
65.121.101.90 0:0:0:0:0:ffff:4179:655a
65.121.101.91 0:0:0:0:0:ffff:4179:655b
65.121.101.92 0:0:0:0:0:ffff:4179:655c
65.121.101.93 0:0:0:0:0:ffff:4179:655d
65.121.101.94 0:0:0:0:0:ffff:4179:655e
65.121.101.95 0:0:0:0:0:ffff:4179:655f
65.121.101.96 0:0:0:0:0:ffff:4179:6560
65.121.101.97 0:0:0:0:0:ffff:4179:6561
65.121.101.98 0:0:0:0:0:ffff:4179:6562
65.121.101.99 0:0:0:0:0:ffff:4179:6563
65.121.101.100 0:0:0:0:0:ffff:4179:6564
65.121.101.101 0:0:0:0:0:ffff:4179:6565
65.121.101.102 0:0:0:0:0:ffff:4179:6566
65.121.101.103 0:0:0:0:0:ffff:4179:6567
65.121.101.104 0:0:0:0:0:ffff:4179:6568
65.121.101.105 0:0:0:0:0:ffff:4179:6569
65.121.101.106 0:0:0:0:0:ffff:4179:656a
65.121.101.107 0:0:0:0:0:ffff:4179:656b
65.121.101.108 0:0:0:0:0:ffff:4179:656c
65.121.101.109 0:0:0:0:0:ffff:4179:656d
65.121.101.110 0:0:0:0:0:ffff:4179:656e
65.121.101.111 0:0:0:0:0:ffff:4179:656f
65.121.101.112 0:0:0:0:0:ffff:4179:6570
65.121.101.113 0:0:0:0:0:ffff:4179:6571
65.121.101.114 0:0:0:0:0:ffff:4179:6572
65.121.101.115 0:0:0:0:0:ffff:4179:6573
65.121.101.116 0:0:0:0:0:ffff:4179:6574
65.121.101.117 0:0:0:0:0:ffff:4179:6575
65.121.101.118 0:0:0:0:0:ffff:4179:6576
65.121.101.119 0:0:0:0:0:ffff:4179:6577
65.121.101.120 0:0:0:0:0:ffff:4179:6578


65.121.101.121 0:0:0:0:0:ffff:4179:6579
65.121.101.122 0:0:0:0:0:ffff:4179:657a
65.121.101.123 0:0:0:0:0:ffff:4179:657b
65.121.101.124 0:0:0:0:0:ffff:4179:657c
65.121.101.125 0:0:0:0:0:ffff:4179:657d
65.121.101.126 0:0:0:0:0:ffff:4179:657e
65.121.101.127 0:0:0:0:0:ffff:4179:657f
65.121.101.128 0:0:0:0:0:ffff:4179:6580
65.121.101.129 0:0:0:0:0:ffff:4179:6581
65.121.101.130 0:0:0:0:0:ffff:4179:6582
65.121.101.131 0:0:0:0:0:ffff:4179:6583
65.121.101.132 0:0:0:0:0:ffff:4179:6584
65.121.101.133 0:0:0:0:0:ffff:4179:6585
65.121.101.134 0:0:0:0:0:ffff:4179:6586
65.121.101.135 0:0:0:0:0:ffff:4179:6587
65.121.101.136 0:0:0:0:0:ffff:4179:6588
65.121.101.137 0:0:0:0:0:ffff:4179:6589
65.121.101.138 0:0:0:0:0:ffff:4179:658a
65.121.101.139 0:0:0:0:0:ffff:4179:658b
65.121.101.140 0:0:0:0:0:ffff:4179:658c
65.121.101.141 0:0:0:0:0:ffff:4179:658d
65.121.101.142 0:0:0:0:0:ffff:4179:658e
65.121.101.143 0:0:0:0:0:ffff:4179:658f
65.121.101.144 0:0:0:0:0:ffff:4179:6590
65.121.101.145 0:0:0:0:0:ffff:4179:6591
65.121.101.146 0:0:0:0:0:ffff:4179:6592
65.121.101.147 0:0:0:0:0:ffff:4179:6593
65.121.101.148 0:0:0:0:0:ffff:4179:6594
65.121.101.149 0:0:0:0:0:ffff:4179:6595
65.121.101.150 0:0:0:0:0:ffff:4179:6596
65.121.101.151 0:0:0:0:0:ffff:4179:6597
65.121.101.152 0:0:0:0:0:ffff:4179:6598
65.121.101.153 0:0:0:0:0:ffff:4179:6599
65.121.101.154 0:0:0:0:0:ffff:4179:659a
65.121.101.155 0:0:0:0:0:ffff:4179:659b
65.121.101.156 0:0:0:0:0:ffff:4179:659c
65.121.101.157 0:0:0:0:0:ffff:4179:659d
65.121.101.158 0:0:0:0:0:ffff:4179:659e
65.121.101.159 0:0:0:0:0:ffff:4179:659f
65.121.101.160 0:0:0:0:0:ffff:4179:65a0
65.121.101.161 0:0:0:0:0:ffff:4179:65a1
65.121.101.162 0:0:0:0:0:ffff:4179:65a2
65.121.101.163 0:0:0:0:0:ffff:4179:65a3
65.121.101.164 0:0:0:0:0:ffff:4179:65a4
65.121.101.165 0:0:0:0:0:ffff:4179:65a5
65.121.101.166 0:0:0:0:0:ffff:4179:65a6
65.121.101.167 0:0:0:0:0:ffff:4179:65a7
65.121.101.168 0:0:0:0:0:ffff:4179:65a8
65.121.101.169 0:0:0:0:0:ffff:4179:65a9
65.121.101.170 0:0:0:0:0:ffff:4179:65aa
65.121.101.171 0:0:0:0:0:ffff:4179:65ab
65.121.101.172 0:0:0:0:0:ffff:4179:65ac
65.121.101.173 0:0:0:0:0:ffff:4179:65ad
65.121.101.174 0:0:0:0:0:ffff:4179:65ae
65.121.101.175 0:0:0:0:0:ffff:4179:65af
65.121.101.176 0:0:0:0:0:ffff:4179:65b0
65.121.101.177 0:0:0:0:0:ffff:4179:65b1
65.121.101.178 0:0:0:0:0:ffff:4179:65b2
65.121.101.179 0:0:0:0:0:ffff:4179:65b3
65.121.101.180 0:0:0:0:0:ffff:4179:65b4


65.121.101.181 0:0:0:0:0:ffff:4179:65b5
65.121.101.182 0:0:0:0:0:ffff:4179:65b6
65.121.101.183 0:0:0:0:0:ffff:4179:65b7
65.121.101.184 0:0:0:0:0:ffff:4179:65b8
65.121.101.185 0:0:0:0:0:ffff:4179:65b9
65.121.101.186 0:0:0:0:0:ffff:4179:65ba
65.121.101.187 0:0:0:0:0:ffff:4179:65bb
65.121.101.188 0:0:0:0:0:ffff:4179:65bc
65.121.101.189 0:0:0:0:0:ffff:4179:65bd
65.121.101.190 0:0:0:0:0:ffff:4179:65be
65.121.101.191 0:0:0:0:0:ffff:4179:65bf
65.121.101.192 0:0:0:0:0:ffff:4179:65c0
65.121.101.193 0:0:0:0:0:ffff:4179:65c1
65.121.101.194 0:0:0:0:0:ffff:4179:65c2
65.121.101.195 0:0:0:0:0:ffff:4179:65c3
65.121.101.196 0:0:0:0:0:ffff:4179:65c4
65.121.101.197 0:0:0:0:0:ffff:4179:65c5
65.121.101.198 0:0:0:0:0:ffff:4179:65c6
65.121.101.199 0:0:0:0:0:ffff:4179:65c7
65.121.101.200 0:0:0:0:0:ffff:4179:65c8
65.121.101.201 0:0:0:0:0:ffff:4179:65c9
65.121.101.202 0:0:0:0:0:ffff:4179:65ca
65.121.101.203 0:0:0:0:0:ffff:4179:65cb
65.121.101.204 0:0:0:0:0:ffff:4179:65cc
65.121.101.205 0:0:0:0:0:ffff:4179:65cd
65.121.101.206 0:0:0:0:0:ffff:4179:65ce
65.121.101.207 0:0:0:0:0:ffff:4179:65cf
65.121.101.208 0:0:0:0:0:ffff:4179:65d0
65.121.101.209 0:0:0:0:0:ffff:4179:65d1
65.121.101.210 0:0:0:0:0:ffff:4179:65d2
65.121.101.211 0:0:0:0:0:ffff:4179:65d3
65.121.101.212 0:0:0:0:0:ffff:4179:65d4
65.121.101.213 0:0:0:0:0:ffff:4179:65d5
65.121.101.214 0:0:0:0:0:ffff:4179:65d6
65.121.101.215 0:0:0:0:0:ffff:4179:65d7
65.121.101.216 0:0:0:0:0:ffff:4179:65d8
65.121.101.217 0:0:0:0:0:ffff:4179:65d9
65.121.101.218 0:0:0:0:0:ffff:4179:65da
65.121.101.219 0:0:0:0:0:ffff:4179:65db
65.121.101.220 0:0:0:0:0:ffff:4179:65dc
65.121.101.221 0:0:0:0:0:ffff:4179:65dd
65.121.101.222 0:0:0:0:0:ffff:4179:65de
65.121.101.223 0:0:0:0:0:ffff:4179:65df
65.121.101.224 0:0:0:0:0:ffff:4179:65e0
65.121.101.225 0:0:0:0:0:ffff:4179:65e1
65.121.101.226 0:0:0:0:0:ffff:4179:65e2
65.121.101.227 0:0:0:0:0:ffff:4179:65e3
65.121.101.228 0:0:0:0:0:ffff:4179:65e4
65.121.101.229 0:0:0:0:0:ffff:4179:65e5
65.121.101.230 0:0:0:0:0:ffff:4179:65e6
65.121.101.231 0:0:0:0:0:ffff:4179:65e7
65.121.101.232 0:0:0:0:0:ffff:4179:65e8
65.121.101.233 0:0:0:0:0:ffff:4179:65e9
65.121.101.234 0:0:0:0:0:ffff:4179:65ea
65.121.101.235 0:0:0:0:0:ffff:4179:65eb
65.121.101.236 0:0:0:0:0:ffff:4179:65ec
65.121.101.237 0:0:0:0:0:ffff:4179:65ed
65.121.101.238 0:0:0:0:0:ffff:4179:65ee
65.121.101.239 0:0:0:0:0:ffff:4179:65ef
65.121.101.240 0:0:0:0:0:ffff:4179:65f0
65.121.101.241 0:0:0:0:0:ffff:4179:65f1
65.121.101.242 0:0:0:0:0:ffff:4179:65f2
65.121.101.243 0:0:0:0:0:ffff:4179:65f3
65.121.101.244 0:0:0:0:0:ffff:4179:65f4
65.121.101.245 0:0:0:0:0:ffff:4179:65f5
65.121.101.246 0:0:0:0:0:ffff:4179:65f6
65.121.101.247 0:0:0:0:0:ffff:4179:65f7
65.121.101.248 0:0:0:0:0:ffff:4179:65f8
65.121.101.249 0:0:0:0:0:ffff:4179:65f9
65.121.101.250 0:0:0:0:0:ffff:4179:65fa
65.121.101.251 0:0:0:0:0:ffff:4179:65fb
65.121.101.252 0:0:0:0:0:ffff:4179:65fc
65.121.101.253 0:0:0:0:0:ffff:4179:65fd
65.121.101.254 0:0:0:0:0:ffff:4179:65fe
65.121.101.255 0:0:0:0:0:ffff:4179:65ff


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.