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
51.139.85.1 0:0:0:0:0:ffff:338b:5501
51.139.85.2 0:0:0:0:0:ffff:338b:5502
51.139.85.3 0:0:0:0:0:ffff:338b:5503
51.139.85.4 0:0:0:0:0:ffff:338b:5504
51.139.85.5 0:0:0:0:0:ffff:338b:5505
51.139.85.6 0:0:0:0:0:ffff:338b:5506
51.139.85.7 0:0:0:0:0:ffff:338b:5507
51.139.85.8 0:0:0:0:0:ffff:338b:5508
51.139.85.9 0:0:0:0:0:ffff:338b:5509
51.139.85.10 0:0:0:0:0:ffff:338b:550a
51.139.85.11 0:0:0:0:0:ffff:338b:550b
51.139.85.12 0:0:0:0:0:ffff:338b:550c
51.139.85.13 0:0:0:0:0:ffff:338b:550d
51.139.85.14 0:0:0:0:0:ffff:338b:550e
51.139.85.15 0:0:0:0:0:ffff:338b:550f
51.139.85.16 0:0:0:0:0:ffff:338b:5510
51.139.85.17 0:0:0:0:0:ffff:338b:5511
51.139.85.18 0:0:0:0:0:ffff:338b:5512
51.139.85.19 0:0:0:0:0:ffff:338b:5513
51.139.85.20 0:0:0:0:0:ffff:338b:5514
51.139.85.21 0:0:0:0:0:ffff:338b:5515
51.139.85.22 0:0:0:0:0:ffff:338b:5516
51.139.85.23 0:0:0:0:0:ffff:338b:5517
51.139.85.24 0:0:0:0:0:ffff:338b:5518
51.139.85.25 0:0:0:0:0:ffff:338b:5519
51.139.85.26 0:0:0:0:0:ffff:338b:551a
51.139.85.27 0:0:0:0:0:ffff:338b:551b
51.139.85.28 0:0:0:0:0:ffff:338b:551c
51.139.85.29 0:0:0:0:0:ffff:338b:551d
51.139.85.30 0:0:0:0:0:ffff:338b:551e
51.139.85.31 0:0:0:0:0:ffff:338b:551f
51.139.85.32 0:0:0:0:0:ffff:338b:5520
51.139.85.33 0:0:0:0:0:ffff:338b:5521
51.139.85.34 0:0:0:0:0:ffff:338b:5522
51.139.85.35 0:0:0:0:0:ffff:338b:5523
51.139.85.36 0:0:0:0:0:ffff:338b:5524
51.139.85.37 0:0:0:0:0:ffff:338b:5525
51.139.85.38 0:0:0:0:0:ffff:338b:5526
51.139.85.39 0:0:0:0:0:ffff:338b:5527
51.139.85.40 0:0:0:0:0:ffff:338b:5528
51.139.85.41 0:0:0:0:0:ffff:338b:5529
51.139.85.42 0:0:0:0:0:ffff:338b:552a
51.139.85.43 0:0:0:0:0:ffff:338b:552b
51.139.85.44 0:0:0:0:0:ffff:338b:552c
51.139.85.45 0:0:0:0:0:ffff:338b:552d
51.139.85.46 0:0:0:0:0:ffff:338b:552e
51.139.85.47 0:0:0:0:0:ffff:338b:552f
51.139.85.48 0:0:0:0:0:ffff:338b:5530
51.139.85.49 0:0:0:0:0:ffff:338b:5531
51.139.85.50 0:0:0:0:0:ffff:338b:5532
51.139.85.51 0:0:0:0:0:ffff:338b:5533
51.139.85.52 0:0:0:0:0:ffff:338b:5534
51.139.85.53 0:0:0:0:0:ffff:338b:5535
51.139.85.54 0:0:0:0:0:ffff:338b:5536
51.139.85.55 0:0:0:0:0:ffff:338b:5537
51.139.85.56 0:0:0:0:0:ffff:338b:5538
51.139.85.57 0:0:0:0:0:ffff:338b:5539
51.139.85.58 0:0:0:0:0:ffff:338b:553a
51.139.85.59 0:0:0:0:0:ffff:338b:553b
51.139.85.60 0:0:0:0:0:ffff:338b:553c


51.139.85.61 0:0:0:0:0:ffff:338b:553d
51.139.85.62 0:0:0:0:0:ffff:338b:553e
51.139.85.63 0:0:0:0:0:ffff:338b:553f
51.139.85.64 0:0:0:0:0:ffff:338b:5540
51.139.85.65 0:0:0:0:0:ffff:338b:5541
51.139.85.66 0:0:0:0:0:ffff:338b:5542
51.139.85.67 0:0:0:0:0:ffff:338b:5543
51.139.85.68 0:0:0:0:0:ffff:338b:5544
51.139.85.69 0:0:0:0:0:ffff:338b:5545
51.139.85.70 0:0:0:0:0:ffff:338b:5546
51.139.85.71 0:0:0:0:0:ffff:338b:5547
51.139.85.72 0:0:0:0:0:ffff:338b:5548
51.139.85.73 0:0:0:0:0:ffff:338b:5549
51.139.85.74 0:0:0:0:0:ffff:338b:554a
51.139.85.75 0:0:0:0:0:ffff:338b:554b
51.139.85.76 0:0:0:0:0:ffff:338b:554c
51.139.85.77 0:0:0:0:0:ffff:338b:554d
51.139.85.78 0:0:0:0:0:ffff:338b:554e
51.139.85.79 0:0:0:0:0:ffff:338b:554f
51.139.85.80 0:0:0:0:0:ffff:338b:5550
51.139.85.81 0:0:0:0:0:ffff:338b:5551
51.139.85.82 0:0:0:0:0:ffff:338b:5552
51.139.85.83 0:0:0:0:0:ffff:338b:5553
51.139.85.84 0:0:0:0:0:ffff:338b:5554
51.139.85.85 0:0:0:0:0:ffff:338b:5555
51.139.85.86 0:0:0:0:0:ffff:338b:5556
51.139.85.87 0:0:0:0:0:ffff:338b:5557
51.139.85.88 0:0:0:0:0:ffff:338b:5558
51.139.85.89 0:0:0:0:0:ffff:338b:5559
51.139.85.90 0:0:0:0:0:ffff:338b:555a
51.139.85.91 0:0:0:0:0:ffff:338b:555b
51.139.85.92 0:0:0:0:0:ffff:338b:555c
51.139.85.93 0:0:0:0:0:ffff:338b:555d
51.139.85.94 0:0:0:0:0:ffff:338b:555e
51.139.85.95 0:0:0:0:0:ffff:338b:555f
51.139.85.96 0:0:0:0:0:ffff:338b:5560
51.139.85.97 0:0:0:0:0:ffff:338b:5561
51.139.85.98 0:0:0:0:0:ffff:338b:5562
51.139.85.99 0:0:0:0:0:ffff:338b:5563
51.139.85.100 0:0:0:0:0:ffff:338b:5564
51.139.85.101 0:0:0:0:0:ffff:338b:5565
51.139.85.102 0:0:0:0:0:ffff:338b:5566
51.139.85.103 0:0:0:0:0:ffff:338b:5567
51.139.85.104 0:0:0:0:0:ffff:338b:5568
51.139.85.105 0:0:0:0:0:ffff:338b:5569
51.139.85.106 0:0:0:0:0:ffff:338b:556a
51.139.85.107 0:0:0:0:0:ffff:338b:556b
51.139.85.108 0:0:0:0:0:ffff:338b:556c
51.139.85.109 0:0:0:0:0:ffff:338b:556d
51.139.85.110 0:0:0:0:0:ffff:338b:556e
51.139.85.111 0:0:0:0:0:ffff:338b:556f
51.139.85.112 0:0:0:0:0:ffff:338b:5570
51.139.85.113 0:0:0:0:0:ffff:338b:5571
51.139.85.114 0:0:0:0:0:ffff:338b:5572
51.139.85.115 0:0:0:0:0:ffff:338b:5573
51.139.85.116 0:0:0:0:0:ffff:338b:5574
51.139.85.117 0:0:0:0:0:ffff:338b:5575
51.139.85.118 0:0:0:0:0:ffff:338b:5576
51.139.85.119 0:0:0:0:0:ffff:338b:5577
51.139.85.120 0:0:0:0:0:ffff:338b:5578


51.139.85.121 0:0:0:0:0:ffff:338b:5579
51.139.85.122 0:0:0:0:0:ffff:338b:557a
51.139.85.123 0:0:0:0:0:ffff:338b:557b
51.139.85.124 0:0:0:0:0:ffff:338b:557c
51.139.85.125 0:0:0:0:0:ffff:338b:557d
51.139.85.126 0:0:0:0:0:ffff:338b:557e
51.139.85.127 0:0:0:0:0:ffff:338b:557f
51.139.85.128 0:0:0:0:0:ffff:338b:5580
51.139.85.129 0:0:0:0:0:ffff:338b:5581
51.139.85.130 0:0:0:0:0:ffff:338b:5582
51.139.85.131 0:0:0:0:0:ffff:338b:5583
51.139.85.132 0:0:0:0:0:ffff:338b:5584
51.139.85.133 0:0:0:0:0:ffff:338b:5585
51.139.85.134 0:0:0:0:0:ffff:338b:5586
51.139.85.135 0:0:0:0:0:ffff:338b:5587
51.139.85.136 0:0:0:0:0:ffff:338b:5588
51.139.85.137 0:0:0:0:0:ffff:338b:5589
51.139.85.138 0:0:0:0:0:ffff:338b:558a
51.139.85.139 0:0:0:0:0:ffff:338b:558b
51.139.85.140 0:0:0:0:0:ffff:338b:558c
51.139.85.141 0:0:0:0:0:ffff:338b:558d
51.139.85.142 0:0:0:0:0:ffff:338b:558e
51.139.85.143 0:0:0:0:0:ffff:338b:558f
51.139.85.144 0:0:0:0:0:ffff:338b:5590
51.139.85.145 0:0:0:0:0:ffff:338b:5591
51.139.85.146 0:0:0:0:0:ffff:338b:5592
51.139.85.147 0:0:0:0:0:ffff:338b:5593
51.139.85.148 0:0:0:0:0:ffff:338b:5594
51.139.85.149 0:0:0:0:0:ffff:338b:5595
51.139.85.150 0:0:0:0:0:ffff:338b:5596
51.139.85.151 0:0:0:0:0:ffff:338b:5597
51.139.85.152 0:0:0:0:0:ffff:338b:5598
51.139.85.153 0:0:0:0:0:ffff:338b:5599
51.139.85.154 0:0:0:0:0:ffff:338b:559a
51.139.85.155 0:0:0:0:0:ffff:338b:559b
51.139.85.156 0:0:0:0:0:ffff:338b:559c
51.139.85.157 0:0:0:0:0:ffff:338b:559d
51.139.85.158 0:0:0:0:0:ffff:338b:559e
51.139.85.159 0:0:0:0:0:ffff:338b:559f
51.139.85.160 0:0:0:0:0:ffff:338b:55a0
51.139.85.161 0:0:0:0:0:ffff:338b:55a1
51.139.85.162 0:0:0:0:0:ffff:338b:55a2
51.139.85.163 0:0:0:0:0:ffff:338b:55a3
51.139.85.164 0:0:0:0:0:ffff:338b:55a4
51.139.85.165 0:0:0:0:0:ffff:338b:55a5
51.139.85.166 0:0:0:0:0:ffff:338b:55a6
51.139.85.167 0:0:0:0:0:ffff:338b:55a7
51.139.85.168 0:0:0:0:0:ffff:338b:55a8
51.139.85.169 0:0:0:0:0:ffff:338b:55a9
51.139.85.170 0:0:0:0:0:ffff:338b:55aa
51.139.85.171 0:0:0:0:0:ffff:338b:55ab
51.139.85.172 0:0:0:0:0:ffff:338b:55ac
51.139.85.173 0:0:0:0:0:ffff:338b:55ad
51.139.85.174 0:0:0:0:0:ffff:338b:55ae
51.139.85.175 0:0:0:0:0:ffff:338b:55af
51.139.85.176 0:0:0:0:0:ffff:338b:55b0
51.139.85.177 0:0:0:0:0:ffff:338b:55b1
51.139.85.178 0:0:0:0:0:ffff:338b:55b2
51.139.85.179 0:0:0:0:0:ffff:338b:55b3
51.139.85.180 0:0:0:0:0:ffff:338b:55b4


51.139.85.181 0:0:0:0:0:ffff:338b:55b5
51.139.85.182 0:0:0:0:0:ffff:338b:55b6
51.139.85.183 0:0:0:0:0:ffff:338b:55b7
51.139.85.184 0:0:0:0:0:ffff:338b:55b8
51.139.85.185 0:0:0:0:0:ffff:338b:55b9
51.139.85.186 0:0:0:0:0:ffff:338b:55ba
51.139.85.187 0:0:0:0:0:ffff:338b:55bb
51.139.85.188 0:0:0:0:0:ffff:338b:55bc
51.139.85.189 0:0:0:0:0:ffff:338b:55bd
51.139.85.190 0:0:0:0:0:ffff:338b:55be
51.139.85.191 0:0:0:0:0:ffff:338b:55bf
51.139.85.192 0:0:0:0:0:ffff:338b:55c0
51.139.85.193 0:0:0:0:0:ffff:338b:55c1
51.139.85.194 0:0:0:0:0:ffff:338b:55c2
51.139.85.195 0:0:0:0:0:ffff:338b:55c3
51.139.85.196 0:0:0:0:0:ffff:338b:55c4
51.139.85.197 0:0:0:0:0:ffff:338b:55c5
51.139.85.198 0:0:0:0:0:ffff:338b:55c6
51.139.85.199 0:0:0:0:0:ffff:338b:55c7
51.139.85.200 0:0:0:0:0:ffff:338b:55c8
51.139.85.201 0:0:0:0:0:ffff:338b:55c9
51.139.85.202 0:0:0:0:0:ffff:338b:55ca
51.139.85.203 0:0:0:0:0:ffff:338b:55cb
51.139.85.204 0:0:0:0:0:ffff:338b:55cc
51.139.85.205 0:0:0:0:0:ffff:338b:55cd
51.139.85.206 0:0:0:0:0:ffff:338b:55ce
51.139.85.207 0:0:0:0:0:ffff:338b:55cf
51.139.85.208 0:0:0:0:0:ffff:338b:55d0
51.139.85.209 0:0:0:0:0:ffff:338b:55d1
51.139.85.210 0:0:0:0:0:ffff:338b:55d2
51.139.85.211 0:0:0:0:0:ffff:338b:55d3
51.139.85.212 0:0:0:0:0:ffff:338b:55d4
51.139.85.213 0:0:0:0:0:ffff:338b:55d5
51.139.85.214 0:0:0:0:0:ffff:338b:55d6
51.139.85.215 0:0:0:0:0:ffff:338b:55d7
51.139.85.216 0:0:0:0:0:ffff:338b:55d8
51.139.85.217 0:0:0:0:0:ffff:338b:55d9
51.139.85.218 0:0:0:0:0:ffff:338b:55da
51.139.85.219 0:0:0:0:0:ffff:338b:55db
51.139.85.220 0:0:0:0:0:ffff:338b:55dc
51.139.85.221 0:0:0:0:0:ffff:338b:55dd
51.139.85.222 0:0:0:0:0:ffff:338b:55de
51.139.85.223 0:0:0:0:0:ffff:338b:55df
51.139.85.224 0:0:0:0:0:ffff:338b:55e0
51.139.85.225 0:0:0:0:0:ffff:338b:55e1
51.139.85.226 0:0:0:0:0:ffff:338b:55e2
51.139.85.227 0:0:0:0:0:ffff:338b:55e3
51.139.85.228 0:0:0:0:0:ffff:338b:55e4
51.139.85.229 0:0:0:0:0:ffff:338b:55e5
51.139.85.230 0:0:0:0:0:ffff:338b:55e6
51.139.85.231 0:0:0:0:0:ffff:338b:55e7
51.139.85.232 0:0:0:0:0:ffff:338b:55e8
51.139.85.233 0:0:0:0:0:ffff:338b:55e9
51.139.85.234 0:0:0:0:0:ffff:338b:55ea
51.139.85.235 0:0:0:0:0:ffff:338b:55eb
51.139.85.236 0:0:0:0:0:ffff:338b:55ec
51.139.85.237 0:0:0:0:0:ffff:338b:55ed
51.139.85.238 0:0:0:0:0:ffff:338b:55ee
51.139.85.239 0:0:0:0:0:ffff:338b:55ef
51.139.85.240 0:0:0:0:0:ffff:338b:55f0
51.139.85.241 0:0:0:0:0:ffff:338b:55f1
51.139.85.242 0:0:0:0:0:ffff:338b:55f2
51.139.85.243 0:0:0:0:0:ffff:338b:55f3
51.139.85.244 0:0:0:0:0:ffff:338b:55f4
51.139.85.245 0:0:0:0:0:ffff:338b:55f5
51.139.85.246 0:0:0:0:0:ffff:338b:55f6
51.139.85.247 0:0:0:0:0:ffff:338b:55f7
51.139.85.248 0:0:0:0:0:ffff:338b:55f8
51.139.85.249 0:0:0:0:0:ffff:338b:55f9
51.139.85.250 0:0:0:0:0:ffff:338b:55fa
51.139.85.251 0:0:0:0:0:ffff:338b:55fb
51.139.85.252 0:0:0:0:0:ffff:338b:55fc
51.139.85.253 0:0:0:0:0:ffff:338b:55fd
51.139.85.254 0:0:0:0:0:ffff:338b:55fe
51.139.85.255 0:0:0:0:0:ffff:338b: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.