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
123.221.37.1 0:0:0:0:0:ffff:7bdd:2501
123.221.37.2 0:0:0:0:0:ffff:7bdd:2502
123.221.37.3 0:0:0:0:0:ffff:7bdd:2503
123.221.37.4 0:0:0:0:0:ffff:7bdd:2504
123.221.37.5 0:0:0:0:0:ffff:7bdd:2505
123.221.37.6 0:0:0:0:0:ffff:7bdd:2506
123.221.37.7 0:0:0:0:0:ffff:7bdd:2507
123.221.37.8 0:0:0:0:0:ffff:7bdd:2508
123.221.37.9 0:0:0:0:0:ffff:7bdd:2509
123.221.37.10 0:0:0:0:0:ffff:7bdd:250a
123.221.37.11 0:0:0:0:0:ffff:7bdd:250b
123.221.37.12 0:0:0:0:0:ffff:7bdd:250c
123.221.37.13 0:0:0:0:0:ffff:7bdd:250d
123.221.37.14 0:0:0:0:0:ffff:7bdd:250e
123.221.37.15 0:0:0:0:0:ffff:7bdd:250f
123.221.37.16 0:0:0:0:0:ffff:7bdd:2510
123.221.37.17 0:0:0:0:0:ffff:7bdd:2511
123.221.37.18 0:0:0:0:0:ffff:7bdd:2512
123.221.37.19 0:0:0:0:0:ffff:7bdd:2513
123.221.37.20 0:0:0:0:0:ffff:7bdd:2514
123.221.37.21 0:0:0:0:0:ffff:7bdd:2515
123.221.37.22 0:0:0:0:0:ffff:7bdd:2516
123.221.37.23 0:0:0:0:0:ffff:7bdd:2517
123.221.37.24 0:0:0:0:0:ffff:7bdd:2518
123.221.37.25 0:0:0:0:0:ffff:7bdd:2519
123.221.37.26 0:0:0:0:0:ffff:7bdd:251a
123.221.37.27 0:0:0:0:0:ffff:7bdd:251b
123.221.37.28 0:0:0:0:0:ffff:7bdd:251c
123.221.37.29 0:0:0:0:0:ffff:7bdd:251d
123.221.37.30 0:0:0:0:0:ffff:7bdd:251e
123.221.37.31 0:0:0:0:0:ffff:7bdd:251f
123.221.37.32 0:0:0:0:0:ffff:7bdd:2520
123.221.37.33 0:0:0:0:0:ffff:7bdd:2521
123.221.37.34 0:0:0:0:0:ffff:7bdd:2522
123.221.37.35 0:0:0:0:0:ffff:7bdd:2523
123.221.37.36 0:0:0:0:0:ffff:7bdd:2524
123.221.37.37 0:0:0:0:0:ffff:7bdd:2525
123.221.37.38 0:0:0:0:0:ffff:7bdd:2526
123.221.37.39 0:0:0:0:0:ffff:7bdd:2527
123.221.37.40 0:0:0:0:0:ffff:7bdd:2528
123.221.37.41 0:0:0:0:0:ffff:7bdd:2529
123.221.37.42 0:0:0:0:0:ffff:7bdd:252a
123.221.37.43 0:0:0:0:0:ffff:7bdd:252b
123.221.37.44 0:0:0:0:0:ffff:7bdd:252c
123.221.37.45 0:0:0:0:0:ffff:7bdd:252d
123.221.37.46 0:0:0:0:0:ffff:7bdd:252e
123.221.37.47 0:0:0:0:0:ffff:7bdd:252f
123.221.37.48 0:0:0:0:0:ffff:7bdd:2530
123.221.37.49 0:0:0:0:0:ffff:7bdd:2531
123.221.37.50 0:0:0:0:0:ffff:7bdd:2532
123.221.37.51 0:0:0:0:0:ffff:7bdd:2533
123.221.37.52 0:0:0:0:0:ffff:7bdd:2534
123.221.37.53 0:0:0:0:0:ffff:7bdd:2535
123.221.37.54 0:0:0:0:0:ffff:7bdd:2536
123.221.37.55 0:0:0:0:0:ffff:7bdd:2537
123.221.37.56 0:0:0:0:0:ffff:7bdd:2538
123.221.37.57 0:0:0:0:0:ffff:7bdd:2539
123.221.37.58 0:0:0:0:0:ffff:7bdd:253a
123.221.37.59 0:0:0:0:0:ffff:7bdd:253b
123.221.37.60 0:0:0:0:0:ffff:7bdd:253c


123.221.37.61 0:0:0:0:0:ffff:7bdd:253d
123.221.37.62 0:0:0:0:0:ffff:7bdd:253e
123.221.37.63 0:0:0:0:0:ffff:7bdd:253f
123.221.37.64 0:0:0:0:0:ffff:7bdd:2540
123.221.37.65 0:0:0:0:0:ffff:7bdd:2541
123.221.37.66 0:0:0:0:0:ffff:7bdd:2542
123.221.37.67 0:0:0:0:0:ffff:7bdd:2543
123.221.37.68 0:0:0:0:0:ffff:7bdd:2544
123.221.37.69 0:0:0:0:0:ffff:7bdd:2545
123.221.37.70 0:0:0:0:0:ffff:7bdd:2546
123.221.37.71 0:0:0:0:0:ffff:7bdd:2547
123.221.37.72 0:0:0:0:0:ffff:7bdd:2548
123.221.37.73 0:0:0:0:0:ffff:7bdd:2549
123.221.37.74 0:0:0:0:0:ffff:7bdd:254a
123.221.37.75 0:0:0:0:0:ffff:7bdd:254b
123.221.37.76 0:0:0:0:0:ffff:7bdd:254c
123.221.37.77 0:0:0:0:0:ffff:7bdd:254d
123.221.37.78 0:0:0:0:0:ffff:7bdd:254e
123.221.37.79 0:0:0:0:0:ffff:7bdd:254f
123.221.37.80 0:0:0:0:0:ffff:7bdd:2550
123.221.37.81 0:0:0:0:0:ffff:7bdd:2551
123.221.37.82 0:0:0:0:0:ffff:7bdd:2552
123.221.37.83 0:0:0:0:0:ffff:7bdd:2553
123.221.37.84 0:0:0:0:0:ffff:7bdd:2554
123.221.37.85 0:0:0:0:0:ffff:7bdd:2555
123.221.37.86 0:0:0:0:0:ffff:7bdd:2556
123.221.37.87 0:0:0:0:0:ffff:7bdd:2557
123.221.37.88 0:0:0:0:0:ffff:7bdd:2558
123.221.37.89 0:0:0:0:0:ffff:7bdd:2559
123.221.37.90 0:0:0:0:0:ffff:7bdd:255a
123.221.37.91 0:0:0:0:0:ffff:7bdd:255b
123.221.37.92 0:0:0:0:0:ffff:7bdd:255c
123.221.37.93 0:0:0:0:0:ffff:7bdd:255d
123.221.37.94 0:0:0:0:0:ffff:7bdd:255e
123.221.37.95 0:0:0:0:0:ffff:7bdd:255f
123.221.37.96 0:0:0:0:0:ffff:7bdd:2560
123.221.37.97 0:0:0:0:0:ffff:7bdd:2561
123.221.37.98 0:0:0:0:0:ffff:7bdd:2562
123.221.37.99 0:0:0:0:0:ffff:7bdd:2563
123.221.37.100 0:0:0:0:0:ffff:7bdd:2564
123.221.37.101 0:0:0:0:0:ffff:7bdd:2565
123.221.37.102 0:0:0:0:0:ffff:7bdd:2566
123.221.37.103 0:0:0:0:0:ffff:7bdd:2567
123.221.37.104 0:0:0:0:0:ffff:7bdd:2568
123.221.37.105 0:0:0:0:0:ffff:7bdd:2569
123.221.37.106 0:0:0:0:0:ffff:7bdd:256a
123.221.37.107 0:0:0:0:0:ffff:7bdd:256b
123.221.37.108 0:0:0:0:0:ffff:7bdd:256c
123.221.37.109 0:0:0:0:0:ffff:7bdd:256d
123.221.37.110 0:0:0:0:0:ffff:7bdd:256e
123.221.37.111 0:0:0:0:0:ffff:7bdd:256f
123.221.37.112 0:0:0:0:0:ffff:7bdd:2570
123.221.37.113 0:0:0:0:0:ffff:7bdd:2571
123.221.37.114 0:0:0:0:0:ffff:7bdd:2572
123.221.37.115 0:0:0:0:0:ffff:7bdd:2573
123.221.37.116 0:0:0:0:0:ffff:7bdd:2574
123.221.37.117 0:0:0:0:0:ffff:7bdd:2575
123.221.37.118 0:0:0:0:0:ffff:7bdd:2576
123.221.37.119 0:0:0:0:0:ffff:7bdd:2577
123.221.37.120 0:0:0:0:0:ffff:7bdd:2578


123.221.37.121 0:0:0:0:0:ffff:7bdd:2579
123.221.37.122 0:0:0:0:0:ffff:7bdd:257a
123.221.37.123 0:0:0:0:0:ffff:7bdd:257b
123.221.37.124 0:0:0:0:0:ffff:7bdd:257c
123.221.37.125 0:0:0:0:0:ffff:7bdd:257d
123.221.37.126 0:0:0:0:0:ffff:7bdd:257e
123.221.37.127 0:0:0:0:0:ffff:7bdd:257f
123.221.37.128 0:0:0:0:0:ffff:7bdd:2580
123.221.37.129 0:0:0:0:0:ffff:7bdd:2581
123.221.37.130 0:0:0:0:0:ffff:7bdd:2582
123.221.37.131 0:0:0:0:0:ffff:7bdd:2583
123.221.37.132 0:0:0:0:0:ffff:7bdd:2584
123.221.37.133 0:0:0:0:0:ffff:7bdd:2585
123.221.37.134 0:0:0:0:0:ffff:7bdd:2586
123.221.37.135 0:0:0:0:0:ffff:7bdd:2587
123.221.37.136 0:0:0:0:0:ffff:7bdd:2588
123.221.37.137 0:0:0:0:0:ffff:7bdd:2589
123.221.37.138 0:0:0:0:0:ffff:7bdd:258a
123.221.37.139 0:0:0:0:0:ffff:7bdd:258b
123.221.37.140 0:0:0:0:0:ffff:7bdd:258c
123.221.37.141 0:0:0:0:0:ffff:7bdd:258d
123.221.37.142 0:0:0:0:0:ffff:7bdd:258e
123.221.37.143 0:0:0:0:0:ffff:7bdd:258f
123.221.37.144 0:0:0:0:0:ffff:7bdd:2590
123.221.37.145 0:0:0:0:0:ffff:7bdd:2591
123.221.37.146 0:0:0:0:0:ffff:7bdd:2592
123.221.37.147 0:0:0:0:0:ffff:7bdd:2593
123.221.37.148 0:0:0:0:0:ffff:7bdd:2594
123.221.37.149 0:0:0:0:0:ffff:7bdd:2595
123.221.37.150 0:0:0:0:0:ffff:7bdd:2596
123.221.37.151 0:0:0:0:0:ffff:7bdd:2597
123.221.37.152 0:0:0:0:0:ffff:7bdd:2598
123.221.37.153 0:0:0:0:0:ffff:7bdd:2599
123.221.37.154 0:0:0:0:0:ffff:7bdd:259a
123.221.37.155 0:0:0:0:0:ffff:7bdd:259b
123.221.37.156 0:0:0:0:0:ffff:7bdd:259c
123.221.37.157 0:0:0:0:0:ffff:7bdd:259d
123.221.37.158 0:0:0:0:0:ffff:7bdd:259e
123.221.37.159 0:0:0:0:0:ffff:7bdd:259f
123.221.37.160 0:0:0:0:0:ffff:7bdd:25a0
123.221.37.161 0:0:0:0:0:ffff:7bdd:25a1
123.221.37.162 0:0:0:0:0:ffff:7bdd:25a2
123.221.37.163 0:0:0:0:0:ffff:7bdd:25a3
123.221.37.164 0:0:0:0:0:ffff:7bdd:25a4
123.221.37.165 0:0:0:0:0:ffff:7bdd:25a5
123.221.37.166 0:0:0:0:0:ffff:7bdd:25a6
123.221.37.167 0:0:0:0:0:ffff:7bdd:25a7
123.221.37.168 0:0:0:0:0:ffff:7bdd:25a8
123.221.37.169 0:0:0:0:0:ffff:7bdd:25a9
123.221.37.170 0:0:0:0:0:ffff:7bdd:25aa
123.221.37.171 0:0:0:0:0:ffff:7bdd:25ab
123.221.37.172 0:0:0:0:0:ffff:7bdd:25ac
123.221.37.173 0:0:0:0:0:ffff:7bdd:25ad
123.221.37.174 0:0:0:0:0:ffff:7bdd:25ae
123.221.37.175 0:0:0:0:0:ffff:7bdd:25af
123.221.37.176 0:0:0:0:0:ffff:7bdd:25b0
123.221.37.177 0:0:0:0:0:ffff:7bdd:25b1
123.221.37.178 0:0:0:0:0:ffff:7bdd:25b2
123.221.37.179 0:0:0:0:0:ffff:7bdd:25b3
123.221.37.180 0:0:0:0:0:ffff:7bdd:25b4


123.221.37.181 0:0:0:0:0:ffff:7bdd:25b5
123.221.37.182 0:0:0:0:0:ffff:7bdd:25b6
123.221.37.183 0:0:0:0:0:ffff:7bdd:25b7
123.221.37.184 0:0:0:0:0:ffff:7bdd:25b8
123.221.37.185 0:0:0:0:0:ffff:7bdd:25b9
123.221.37.186 0:0:0:0:0:ffff:7bdd:25ba
123.221.37.187 0:0:0:0:0:ffff:7bdd:25bb
123.221.37.188 0:0:0:0:0:ffff:7bdd:25bc
123.221.37.189 0:0:0:0:0:ffff:7bdd:25bd
123.221.37.190 0:0:0:0:0:ffff:7bdd:25be
123.221.37.191 0:0:0:0:0:ffff:7bdd:25bf
123.221.37.192 0:0:0:0:0:ffff:7bdd:25c0
123.221.37.193 0:0:0:0:0:ffff:7bdd:25c1
123.221.37.194 0:0:0:0:0:ffff:7bdd:25c2
123.221.37.195 0:0:0:0:0:ffff:7bdd:25c3
123.221.37.196 0:0:0:0:0:ffff:7bdd:25c4
123.221.37.197 0:0:0:0:0:ffff:7bdd:25c5
123.221.37.198 0:0:0:0:0:ffff:7bdd:25c6
123.221.37.199 0:0:0:0:0:ffff:7bdd:25c7
123.221.37.200 0:0:0:0:0:ffff:7bdd:25c8
123.221.37.201 0:0:0:0:0:ffff:7bdd:25c9
123.221.37.202 0:0:0:0:0:ffff:7bdd:25ca
123.221.37.203 0:0:0:0:0:ffff:7bdd:25cb
123.221.37.204 0:0:0:0:0:ffff:7bdd:25cc
123.221.37.205 0:0:0:0:0:ffff:7bdd:25cd
123.221.37.206 0:0:0:0:0:ffff:7bdd:25ce
123.221.37.207 0:0:0:0:0:ffff:7bdd:25cf
123.221.37.208 0:0:0:0:0:ffff:7bdd:25d0
123.221.37.209 0:0:0:0:0:ffff:7bdd:25d1
123.221.37.210 0:0:0:0:0:ffff:7bdd:25d2
123.221.37.211 0:0:0:0:0:ffff:7bdd:25d3
123.221.37.212 0:0:0:0:0:ffff:7bdd:25d4
123.221.37.213 0:0:0:0:0:ffff:7bdd:25d5
123.221.37.214 0:0:0:0:0:ffff:7bdd:25d6
123.221.37.215 0:0:0:0:0:ffff:7bdd:25d7
123.221.37.216 0:0:0:0:0:ffff:7bdd:25d8
123.221.37.217 0:0:0:0:0:ffff:7bdd:25d9
123.221.37.218 0:0:0:0:0:ffff:7bdd:25da
123.221.37.219 0:0:0:0:0:ffff:7bdd:25db
123.221.37.220 0:0:0:0:0:ffff:7bdd:25dc
123.221.37.221 0:0:0:0:0:ffff:7bdd:25dd
123.221.37.222 0:0:0:0:0:ffff:7bdd:25de
123.221.37.223 0:0:0:0:0:ffff:7bdd:25df
123.221.37.224 0:0:0:0:0:ffff:7bdd:25e0
123.221.37.225 0:0:0:0:0:ffff:7bdd:25e1
123.221.37.226 0:0:0:0:0:ffff:7bdd:25e2
123.221.37.227 0:0:0:0:0:ffff:7bdd:25e3
123.221.37.228 0:0:0:0:0:ffff:7bdd:25e4
123.221.37.229 0:0:0:0:0:ffff:7bdd:25e5
123.221.37.230 0:0:0:0:0:ffff:7bdd:25e6
123.221.37.231 0:0:0:0:0:ffff:7bdd:25e7
123.221.37.232 0:0:0:0:0:ffff:7bdd:25e8
123.221.37.233 0:0:0:0:0:ffff:7bdd:25e9
123.221.37.234 0:0:0:0:0:ffff:7bdd:25ea
123.221.37.235 0:0:0:0:0:ffff:7bdd:25eb
123.221.37.236 0:0:0:0:0:ffff:7bdd:25ec
123.221.37.237 0:0:0:0:0:ffff:7bdd:25ed
123.221.37.238 0:0:0:0:0:ffff:7bdd:25ee
123.221.37.239 0:0:0:0:0:ffff:7bdd:25ef
123.221.37.240 0:0:0:0:0:ffff:7bdd:25f0
123.221.37.241 0:0:0:0:0:ffff:7bdd:25f1
123.221.37.242 0:0:0:0:0:ffff:7bdd:25f2
123.221.37.243 0:0:0:0:0:ffff:7bdd:25f3
123.221.37.244 0:0:0:0:0:ffff:7bdd:25f4
123.221.37.245 0:0:0:0:0:ffff:7bdd:25f5
123.221.37.246 0:0:0:0:0:ffff:7bdd:25f6
123.221.37.247 0:0:0:0:0:ffff:7bdd:25f7
123.221.37.248 0:0:0:0:0:ffff:7bdd:25f8
123.221.37.249 0:0:0:0:0:ffff:7bdd:25f9
123.221.37.250 0:0:0:0:0:ffff:7bdd:25fa
123.221.37.251 0:0:0:0:0:ffff:7bdd:25fb
123.221.37.252 0:0:0:0:0:ffff:7bdd:25fc
123.221.37.253 0:0:0:0:0:ffff:7bdd:25fd
123.221.37.254 0:0:0:0:0:ffff:7bdd:25fe
123.221.37.255 0:0:0:0:0:ffff:7bdd:25ff


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.