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
72.81.85.1 0:0:0:0:0:ffff:4851:5501
72.81.85.2 0:0:0:0:0:ffff:4851:5502
72.81.85.3 0:0:0:0:0:ffff:4851:5503
72.81.85.4 0:0:0:0:0:ffff:4851:5504
72.81.85.5 0:0:0:0:0:ffff:4851:5505
72.81.85.6 0:0:0:0:0:ffff:4851:5506
72.81.85.7 0:0:0:0:0:ffff:4851:5507
72.81.85.8 0:0:0:0:0:ffff:4851:5508
72.81.85.9 0:0:0:0:0:ffff:4851:5509
72.81.85.10 0:0:0:0:0:ffff:4851:550a
72.81.85.11 0:0:0:0:0:ffff:4851:550b
72.81.85.12 0:0:0:0:0:ffff:4851:550c
72.81.85.13 0:0:0:0:0:ffff:4851:550d
72.81.85.14 0:0:0:0:0:ffff:4851:550e
72.81.85.15 0:0:0:0:0:ffff:4851:550f
72.81.85.16 0:0:0:0:0:ffff:4851:5510
72.81.85.17 0:0:0:0:0:ffff:4851:5511
72.81.85.18 0:0:0:0:0:ffff:4851:5512
72.81.85.19 0:0:0:0:0:ffff:4851:5513
72.81.85.20 0:0:0:0:0:ffff:4851:5514
72.81.85.21 0:0:0:0:0:ffff:4851:5515
72.81.85.22 0:0:0:0:0:ffff:4851:5516
72.81.85.23 0:0:0:0:0:ffff:4851:5517
72.81.85.24 0:0:0:0:0:ffff:4851:5518
72.81.85.25 0:0:0:0:0:ffff:4851:5519
72.81.85.26 0:0:0:0:0:ffff:4851:551a
72.81.85.27 0:0:0:0:0:ffff:4851:551b
72.81.85.28 0:0:0:0:0:ffff:4851:551c
72.81.85.29 0:0:0:0:0:ffff:4851:551d
72.81.85.30 0:0:0:0:0:ffff:4851:551e
72.81.85.31 0:0:0:0:0:ffff:4851:551f
72.81.85.32 0:0:0:0:0:ffff:4851:5520
72.81.85.33 0:0:0:0:0:ffff:4851:5521
72.81.85.34 0:0:0:0:0:ffff:4851:5522
72.81.85.35 0:0:0:0:0:ffff:4851:5523
72.81.85.36 0:0:0:0:0:ffff:4851:5524
72.81.85.37 0:0:0:0:0:ffff:4851:5525
72.81.85.38 0:0:0:0:0:ffff:4851:5526
72.81.85.39 0:0:0:0:0:ffff:4851:5527
72.81.85.40 0:0:0:0:0:ffff:4851:5528
72.81.85.41 0:0:0:0:0:ffff:4851:5529
72.81.85.42 0:0:0:0:0:ffff:4851:552a
72.81.85.43 0:0:0:0:0:ffff:4851:552b
72.81.85.44 0:0:0:0:0:ffff:4851:552c
72.81.85.45 0:0:0:0:0:ffff:4851:552d
72.81.85.46 0:0:0:0:0:ffff:4851:552e
72.81.85.47 0:0:0:0:0:ffff:4851:552f
72.81.85.48 0:0:0:0:0:ffff:4851:5530
72.81.85.49 0:0:0:0:0:ffff:4851:5531
72.81.85.50 0:0:0:0:0:ffff:4851:5532
72.81.85.51 0:0:0:0:0:ffff:4851:5533
72.81.85.52 0:0:0:0:0:ffff:4851:5534
72.81.85.53 0:0:0:0:0:ffff:4851:5535
72.81.85.54 0:0:0:0:0:ffff:4851:5536
72.81.85.55 0:0:0:0:0:ffff:4851:5537
72.81.85.56 0:0:0:0:0:ffff:4851:5538
72.81.85.57 0:0:0:0:0:ffff:4851:5539
72.81.85.58 0:0:0:0:0:ffff:4851:553a
72.81.85.59 0:0:0:0:0:ffff:4851:553b
72.81.85.60 0:0:0:0:0:ffff:4851:553c


72.81.85.61 0:0:0:0:0:ffff:4851:553d
72.81.85.62 0:0:0:0:0:ffff:4851:553e
72.81.85.63 0:0:0:0:0:ffff:4851:553f
72.81.85.64 0:0:0:0:0:ffff:4851:5540
72.81.85.65 0:0:0:0:0:ffff:4851:5541
72.81.85.66 0:0:0:0:0:ffff:4851:5542
72.81.85.67 0:0:0:0:0:ffff:4851:5543
72.81.85.68 0:0:0:0:0:ffff:4851:5544
72.81.85.69 0:0:0:0:0:ffff:4851:5545
72.81.85.70 0:0:0:0:0:ffff:4851:5546
72.81.85.71 0:0:0:0:0:ffff:4851:5547
72.81.85.72 0:0:0:0:0:ffff:4851:5548
72.81.85.73 0:0:0:0:0:ffff:4851:5549
72.81.85.74 0:0:0:0:0:ffff:4851:554a
72.81.85.75 0:0:0:0:0:ffff:4851:554b
72.81.85.76 0:0:0:0:0:ffff:4851:554c
72.81.85.77 0:0:0:0:0:ffff:4851:554d
72.81.85.78 0:0:0:0:0:ffff:4851:554e
72.81.85.79 0:0:0:0:0:ffff:4851:554f
72.81.85.80 0:0:0:0:0:ffff:4851:5550
72.81.85.81 0:0:0:0:0:ffff:4851:5551
72.81.85.82 0:0:0:0:0:ffff:4851:5552
72.81.85.83 0:0:0:0:0:ffff:4851:5553
72.81.85.84 0:0:0:0:0:ffff:4851:5554
72.81.85.85 0:0:0:0:0:ffff:4851:5555
72.81.85.86 0:0:0:0:0:ffff:4851:5556
72.81.85.87 0:0:0:0:0:ffff:4851:5557
72.81.85.88 0:0:0:0:0:ffff:4851:5558
72.81.85.89 0:0:0:0:0:ffff:4851:5559
72.81.85.90 0:0:0:0:0:ffff:4851:555a
72.81.85.91 0:0:0:0:0:ffff:4851:555b
72.81.85.92 0:0:0:0:0:ffff:4851:555c
72.81.85.93 0:0:0:0:0:ffff:4851:555d
72.81.85.94 0:0:0:0:0:ffff:4851:555e
72.81.85.95 0:0:0:0:0:ffff:4851:555f
72.81.85.96 0:0:0:0:0:ffff:4851:5560
72.81.85.97 0:0:0:0:0:ffff:4851:5561
72.81.85.98 0:0:0:0:0:ffff:4851:5562
72.81.85.99 0:0:0:0:0:ffff:4851:5563
72.81.85.100 0:0:0:0:0:ffff:4851:5564
72.81.85.101 0:0:0:0:0:ffff:4851:5565
72.81.85.102 0:0:0:0:0:ffff:4851:5566
72.81.85.103 0:0:0:0:0:ffff:4851:5567
72.81.85.104 0:0:0:0:0:ffff:4851:5568
72.81.85.105 0:0:0:0:0:ffff:4851:5569
72.81.85.106 0:0:0:0:0:ffff:4851:556a
72.81.85.107 0:0:0:0:0:ffff:4851:556b
72.81.85.108 0:0:0:0:0:ffff:4851:556c
72.81.85.109 0:0:0:0:0:ffff:4851:556d
72.81.85.110 0:0:0:0:0:ffff:4851:556e
72.81.85.111 0:0:0:0:0:ffff:4851:556f
72.81.85.112 0:0:0:0:0:ffff:4851:5570
72.81.85.113 0:0:0:0:0:ffff:4851:5571
72.81.85.114 0:0:0:0:0:ffff:4851:5572
72.81.85.115 0:0:0:0:0:ffff:4851:5573
72.81.85.116 0:0:0:0:0:ffff:4851:5574
72.81.85.117 0:0:0:0:0:ffff:4851:5575
72.81.85.118 0:0:0:0:0:ffff:4851:5576
72.81.85.119 0:0:0:0:0:ffff:4851:5577
72.81.85.120 0:0:0:0:0:ffff:4851:5578


72.81.85.121 0:0:0:0:0:ffff:4851:5579
72.81.85.122 0:0:0:0:0:ffff:4851:557a
72.81.85.123 0:0:0:0:0:ffff:4851:557b
72.81.85.124 0:0:0:0:0:ffff:4851:557c
72.81.85.125 0:0:0:0:0:ffff:4851:557d
72.81.85.126 0:0:0:0:0:ffff:4851:557e
72.81.85.127 0:0:0:0:0:ffff:4851:557f
72.81.85.128 0:0:0:0:0:ffff:4851:5580
72.81.85.129 0:0:0:0:0:ffff:4851:5581
72.81.85.130 0:0:0:0:0:ffff:4851:5582
72.81.85.131 0:0:0:0:0:ffff:4851:5583
72.81.85.132 0:0:0:0:0:ffff:4851:5584
72.81.85.133 0:0:0:0:0:ffff:4851:5585
72.81.85.134 0:0:0:0:0:ffff:4851:5586
72.81.85.135 0:0:0:0:0:ffff:4851:5587
72.81.85.136 0:0:0:0:0:ffff:4851:5588
72.81.85.137 0:0:0:0:0:ffff:4851:5589
72.81.85.138 0:0:0:0:0:ffff:4851:558a
72.81.85.139 0:0:0:0:0:ffff:4851:558b
72.81.85.140 0:0:0:0:0:ffff:4851:558c
72.81.85.141 0:0:0:0:0:ffff:4851:558d
72.81.85.142 0:0:0:0:0:ffff:4851:558e
72.81.85.143 0:0:0:0:0:ffff:4851:558f
72.81.85.144 0:0:0:0:0:ffff:4851:5590
72.81.85.145 0:0:0:0:0:ffff:4851:5591
72.81.85.146 0:0:0:0:0:ffff:4851:5592
72.81.85.147 0:0:0:0:0:ffff:4851:5593
72.81.85.148 0:0:0:0:0:ffff:4851:5594
72.81.85.149 0:0:0:0:0:ffff:4851:5595
72.81.85.150 0:0:0:0:0:ffff:4851:5596
72.81.85.151 0:0:0:0:0:ffff:4851:5597
72.81.85.152 0:0:0:0:0:ffff:4851:5598
72.81.85.153 0:0:0:0:0:ffff:4851:5599
72.81.85.154 0:0:0:0:0:ffff:4851:559a
72.81.85.155 0:0:0:0:0:ffff:4851:559b
72.81.85.156 0:0:0:0:0:ffff:4851:559c
72.81.85.157 0:0:0:0:0:ffff:4851:559d
72.81.85.158 0:0:0:0:0:ffff:4851:559e
72.81.85.159 0:0:0:0:0:ffff:4851:559f
72.81.85.160 0:0:0:0:0:ffff:4851:55a0
72.81.85.161 0:0:0:0:0:ffff:4851:55a1
72.81.85.162 0:0:0:0:0:ffff:4851:55a2
72.81.85.163 0:0:0:0:0:ffff:4851:55a3
72.81.85.164 0:0:0:0:0:ffff:4851:55a4
72.81.85.165 0:0:0:0:0:ffff:4851:55a5
72.81.85.166 0:0:0:0:0:ffff:4851:55a6
72.81.85.167 0:0:0:0:0:ffff:4851:55a7
72.81.85.168 0:0:0:0:0:ffff:4851:55a8
72.81.85.169 0:0:0:0:0:ffff:4851:55a9
72.81.85.170 0:0:0:0:0:ffff:4851:55aa
72.81.85.171 0:0:0:0:0:ffff:4851:55ab
72.81.85.172 0:0:0:0:0:ffff:4851:55ac
72.81.85.173 0:0:0:0:0:ffff:4851:55ad
72.81.85.174 0:0:0:0:0:ffff:4851:55ae
72.81.85.175 0:0:0:0:0:ffff:4851:55af
72.81.85.176 0:0:0:0:0:ffff:4851:55b0
72.81.85.177 0:0:0:0:0:ffff:4851:55b1
72.81.85.178 0:0:0:0:0:ffff:4851:55b2
72.81.85.179 0:0:0:0:0:ffff:4851:55b3
72.81.85.180 0:0:0:0:0:ffff:4851:55b4


72.81.85.181 0:0:0:0:0:ffff:4851:55b5
72.81.85.182 0:0:0:0:0:ffff:4851:55b6
72.81.85.183 0:0:0:0:0:ffff:4851:55b7
72.81.85.184 0:0:0:0:0:ffff:4851:55b8
72.81.85.185 0:0:0:0:0:ffff:4851:55b9
72.81.85.186 0:0:0:0:0:ffff:4851:55ba
72.81.85.187 0:0:0:0:0:ffff:4851:55bb
72.81.85.188 0:0:0:0:0:ffff:4851:55bc
72.81.85.189 0:0:0:0:0:ffff:4851:55bd
72.81.85.190 0:0:0:0:0:ffff:4851:55be
72.81.85.191 0:0:0:0:0:ffff:4851:55bf
72.81.85.192 0:0:0:0:0:ffff:4851:55c0
72.81.85.193 0:0:0:0:0:ffff:4851:55c1
72.81.85.194 0:0:0:0:0:ffff:4851:55c2
72.81.85.195 0:0:0:0:0:ffff:4851:55c3
72.81.85.196 0:0:0:0:0:ffff:4851:55c4
72.81.85.197 0:0:0:0:0:ffff:4851:55c5
72.81.85.198 0:0:0:0:0:ffff:4851:55c6
72.81.85.199 0:0:0:0:0:ffff:4851:55c7
72.81.85.200 0:0:0:0:0:ffff:4851:55c8
72.81.85.201 0:0:0:0:0:ffff:4851:55c9
72.81.85.202 0:0:0:0:0:ffff:4851:55ca
72.81.85.203 0:0:0:0:0:ffff:4851:55cb
72.81.85.204 0:0:0:0:0:ffff:4851:55cc
72.81.85.205 0:0:0:0:0:ffff:4851:55cd
72.81.85.206 0:0:0:0:0:ffff:4851:55ce
72.81.85.207 0:0:0:0:0:ffff:4851:55cf
72.81.85.208 0:0:0:0:0:ffff:4851:55d0
72.81.85.209 0:0:0:0:0:ffff:4851:55d1
72.81.85.210 0:0:0:0:0:ffff:4851:55d2
72.81.85.211 0:0:0:0:0:ffff:4851:55d3
72.81.85.212 0:0:0:0:0:ffff:4851:55d4
72.81.85.213 0:0:0:0:0:ffff:4851:55d5
72.81.85.214 0:0:0:0:0:ffff:4851:55d6
72.81.85.215 0:0:0:0:0:ffff:4851:55d7
72.81.85.216 0:0:0:0:0:ffff:4851:55d8
72.81.85.217 0:0:0:0:0:ffff:4851:55d9
72.81.85.218 0:0:0:0:0:ffff:4851:55da
72.81.85.219 0:0:0:0:0:ffff:4851:55db
72.81.85.220 0:0:0:0:0:ffff:4851:55dc
72.81.85.221 0:0:0:0:0:ffff:4851:55dd
72.81.85.222 0:0:0:0:0:ffff:4851:55de
72.81.85.223 0:0:0:0:0:ffff:4851:55df
72.81.85.224 0:0:0:0:0:ffff:4851:55e0
72.81.85.225 0:0:0:0:0:ffff:4851:55e1
72.81.85.226 0:0:0:0:0:ffff:4851:55e2
72.81.85.227 0:0:0:0:0:ffff:4851:55e3
72.81.85.228 0:0:0:0:0:ffff:4851:55e4
72.81.85.229 0:0:0:0:0:ffff:4851:55e5
72.81.85.230 0:0:0:0:0:ffff:4851:55e6
72.81.85.231 0:0:0:0:0:ffff:4851:55e7
72.81.85.232 0:0:0:0:0:ffff:4851:55e8
72.81.85.233 0:0:0:0:0:ffff:4851:55e9
72.81.85.234 0:0:0:0:0:ffff:4851:55ea
72.81.85.235 0:0:0:0:0:ffff:4851:55eb
72.81.85.236 0:0:0:0:0:ffff:4851:55ec
72.81.85.237 0:0:0:0:0:ffff:4851:55ed
72.81.85.238 0:0:0:0:0:ffff:4851:55ee
72.81.85.239 0:0:0:0:0:ffff:4851:55ef
72.81.85.240 0:0:0:0:0:ffff:4851:55f0
72.81.85.241 0:0:0:0:0:ffff:4851:55f1
72.81.85.242 0:0:0:0:0:ffff:4851:55f2
72.81.85.243 0:0:0:0:0:ffff:4851:55f3
72.81.85.244 0:0:0:0:0:ffff:4851:55f4
72.81.85.245 0:0:0:0:0:ffff:4851:55f5
72.81.85.246 0:0:0:0:0:ffff:4851:55f6
72.81.85.247 0:0:0:0:0:ffff:4851:55f7
72.81.85.248 0:0:0:0:0:ffff:4851:55f8
72.81.85.249 0:0:0:0:0:ffff:4851:55f9
72.81.85.250 0:0:0:0:0:ffff:4851:55fa
72.81.85.251 0:0:0:0:0:ffff:4851:55fb
72.81.85.252 0:0:0:0:0:ffff:4851:55fc
72.81.85.253 0:0:0:0:0:ffff:4851:55fd
72.81.85.254 0:0:0:0:0:ffff:4851:55fe
72.81.85.255 0:0:0:0:0:ffff:4851:55ff


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.