IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.72.97.0/24

network10.72.97.0/24

broadcast10.72.97.255

first host10.72.97.1

last host10.72.97.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.72.97.0/24

address00001010.01001000.01100001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001000.01100001.00000000

broadcast00001010.01001000.01100001.11111111

green = network part, grey = host part

hex0x0a486100

decimal172515584

reverse dns0.97.72.10.in-addr.arpa

ipv4-mapped::ffff:a48:6100

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.72.97.0/32	10.72.97.0 – 10.72.97.0	10.72.97.0
2	10.72.97.1/32	10.72.97.1 – 10.72.97.1	10.72.97.1
3	10.72.97.2/32	10.72.97.2 – 10.72.97.2	10.72.97.2
4	10.72.97.3/32	10.72.97.3 – 10.72.97.3	10.72.97.3
5	10.72.97.4/32	10.72.97.4 – 10.72.97.4	10.72.97.4
6	10.72.97.5/32	10.72.97.5 – 10.72.97.5	10.72.97.5
7	10.72.97.6/32	10.72.97.6 – 10.72.97.6	10.72.97.6
8	10.72.97.7/32	10.72.97.7 – 10.72.97.7	10.72.97.7
9	10.72.97.8/32	10.72.97.8 – 10.72.97.8	10.72.97.8
10	10.72.97.9/32	10.72.97.9 – 10.72.97.9	10.72.97.9
11	10.72.97.10/32	10.72.97.10 – 10.72.97.10	10.72.97.10
12	10.72.97.11/32	10.72.97.11 – 10.72.97.11	10.72.97.11
13	10.72.97.12/32	10.72.97.12 – 10.72.97.12	10.72.97.12
14	10.72.97.13/32	10.72.97.13 – 10.72.97.13	10.72.97.13
15	10.72.97.14/32	10.72.97.14 – 10.72.97.14	10.72.97.14
16	10.72.97.15/32	10.72.97.15 – 10.72.97.15	10.72.97.15
17	10.72.97.16/32	10.72.97.16 – 10.72.97.16	10.72.97.16
18	10.72.97.17/32	10.72.97.17 – 10.72.97.17	10.72.97.17
19	10.72.97.18/32	10.72.97.18 – 10.72.97.18	10.72.97.18
20	10.72.97.19/32	10.72.97.19 – 10.72.97.19	10.72.97.19
21	10.72.97.20/32	10.72.97.20 – 10.72.97.20	10.72.97.20
22	10.72.97.21/32	10.72.97.21 – 10.72.97.21	10.72.97.21
23	10.72.97.22/32	10.72.97.22 – 10.72.97.22	10.72.97.22
24	10.72.97.23/32	10.72.97.23 – 10.72.97.23	10.72.97.23
25	10.72.97.24/32	10.72.97.24 – 10.72.97.24	10.72.97.24
26	10.72.97.25/32	10.72.97.25 – 10.72.97.25	10.72.97.25
27	10.72.97.26/32	10.72.97.26 – 10.72.97.26	10.72.97.26
28	10.72.97.27/32	10.72.97.27 – 10.72.97.27	10.72.97.27
29	10.72.97.28/32	10.72.97.28 – 10.72.97.28	10.72.97.28
30	10.72.97.29/32	10.72.97.29 – 10.72.97.29	10.72.97.29
31	10.72.97.30/32	10.72.97.30 – 10.72.97.30	10.72.97.30
32	10.72.97.31/32	10.72.97.31 – 10.72.97.31	10.72.97.31
33	10.72.97.32/32	10.72.97.32 – 10.72.97.32	10.72.97.32
34	10.72.97.33/32	10.72.97.33 – 10.72.97.33	10.72.97.33
35	10.72.97.34/32	10.72.97.34 – 10.72.97.34	10.72.97.34
36	10.72.97.35/32	10.72.97.35 – 10.72.97.35	10.72.97.35
37	10.72.97.36/32	10.72.97.36 – 10.72.97.36	10.72.97.36
38	10.72.97.37/32	10.72.97.37 – 10.72.97.37	10.72.97.37
39	10.72.97.38/32	10.72.97.38 – 10.72.97.38	10.72.97.38
40	10.72.97.39/32	10.72.97.39 – 10.72.97.39	10.72.97.39
41	10.72.97.40/32	10.72.97.40 – 10.72.97.40	10.72.97.40
42	10.72.97.41/32	10.72.97.41 – 10.72.97.41	10.72.97.41
43	10.72.97.42/32	10.72.97.42 – 10.72.97.42	10.72.97.42
44	10.72.97.43/32	10.72.97.43 – 10.72.97.43	10.72.97.43
45	10.72.97.44/32	10.72.97.44 – 10.72.97.44	10.72.97.44
46	10.72.97.45/32	10.72.97.45 – 10.72.97.45	10.72.97.45
47	10.72.97.46/32	10.72.97.46 – 10.72.97.46	10.72.97.46
48	10.72.97.47/32	10.72.97.47 – 10.72.97.47	10.72.97.47
49	10.72.97.48/32	10.72.97.48 – 10.72.97.48	10.72.97.48
50	10.72.97.49/32	10.72.97.49 – 10.72.97.49	10.72.97.49
51	10.72.97.50/32	10.72.97.50 – 10.72.97.50	10.72.97.50
52	10.72.97.51/32	10.72.97.51 – 10.72.97.51	10.72.97.51
53	10.72.97.52/32	10.72.97.52 – 10.72.97.52	10.72.97.52
54	10.72.97.53/32	10.72.97.53 – 10.72.97.53	10.72.97.53
55	10.72.97.54/32	10.72.97.54 – 10.72.97.54	10.72.97.54
56	10.72.97.55/32	10.72.97.55 – 10.72.97.55	10.72.97.55
57	10.72.97.56/32	10.72.97.56 – 10.72.97.56	10.72.97.56
58	10.72.97.57/32	10.72.97.57 – 10.72.97.57	10.72.97.57
59	10.72.97.58/32	10.72.97.58 – 10.72.97.58	10.72.97.58
60	10.72.97.59/32	10.72.97.59 – 10.72.97.59	10.72.97.59
61	10.72.97.60/32	10.72.97.60 – 10.72.97.60	10.72.97.60
62	10.72.97.61/32	10.72.97.61 – 10.72.97.61	10.72.97.61
63	10.72.97.62/32	10.72.97.62 – 10.72.97.62	10.72.97.62
64	10.72.97.63/32	10.72.97.63 – 10.72.97.63	10.72.97.63
65	10.72.97.64/32	10.72.97.64 – 10.72.97.64	10.72.97.64
66	10.72.97.65/32	10.72.97.65 – 10.72.97.65	10.72.97.65
67	10.72.97.66/32	10.72.97.66 – 10.72.97.66	10.72.97.66
68	10.72.97.67/32	10.72.97.67 – 10.72.97.67	10.72.97.67
69	10.72.97.68/32	10.72.97.68 – 10.72.97.68	10.72.97.68
70	10.72.97.69/32	10.72.97.69 – 10.72.97.69	10.72.97.69
71	10.72.97.70/32	10.72.97.70 – 10.72.97.70	10.72.97.70
72	10.72.97.71/32	10.72.97.71 – 10.72.97.71	10.72.97.71
73	10.72.97.72/32	10.72.97.72 – 10.72.97.72	10.72.97.72
74	10.72.97.73/32	10.72.97.73 – 10.72.97.73	10.72.97.73
75	10.72.97.74/32	10.72.97.74 – 10.72.97.74	10.72.97.74
76	10.72.97.75/32	10.72.97.75 – 10.72.97.75	10.72.97.75
77	10.72.97.76/32	10.72.97.76 – 10.72.97.76	10.72.97.76
78	10.72.97.77/32	10.72.97.77 – 10.72.97.77	10.72.97.77
79	10.72.97.78/32	10.72.97.78 – 10.72.97.78	10.72.97.78
80	10.72.97.79/32	10.72.97.79 – 10.72.97.79	10.72.97.79
81	10.72.97.80/32	10.72.97.80 – 10.72.97.80	10.72.97.80
82	10.72.97.81/32	10.72.97.81 – 10.72.97.81	10.72.97.81
83	10.72.97.82/32	10.72.97.82 – 10.72.97.82	10.72.97.82
84	10.72.97.83/32	10.72.97.83 – 10.72.97.83	10.72.97.83
85	10.72.97.84/32	10.72.97.84 – 10.72.97.84	10.72.97.84
86	10.72.97.85/32	10.72.97.85 – 10.72.97.85	10.72.97.85
87	10.72.97.86/32	10.72.97.86 – 10.72.97.86	10.72.97.86
88	10.72.97.87/32	10.72.97.87 – 10.72.97.87	10.72.97.87
89	10.72.97.88/32	10.72.97.88 – 10.72.97.88	10.72.97.88
90	10.72.97.89/32	10.72.97.89 – 10.72.97.89	10.72.97.89
91	10.72.97.90/32	10.72.97.90 – 10.72.97.90	10.72.97.90
92	10.72.97.91/32	10.72.97.91 – 10.72.97.91	10.72.97.91
93	10.72.97.92/32	10.72.97.92 – 10.72.97.92	10.72.97.92
94	10.72.97.93/32	10.72.97.93 – 10.72.97.93	10.72.97.93
95	10.72.97.94/32	10.72.97.94 – 10.72.97.94	10.72.97.94
96	10.72.97.95/32	10.72.97.95 – 10.72.97.95	10.72.97.95
97	10.72.97.96/32	10.72.97.96 – 10.72.97.96	10.72.97.96
98	10.72.97.97/32	10.72.97.97 – 10.72.97.97	10.72.97.97
99	10.72.97.98/32	10.72.97.98 – 10.72.97.98	10.72.97.98
100	10.72.97.99/32	10.72.97.99 – 10.72.97.99	10.72.97.99
101	10.72.97.100/32	10.72.97.100 – 10.72.97.100	10.72.97.100
102	10.72.97.101/32	10.72.97.101 – 10.72.97.101	10.72.97.101
103	10.72.97.102/32	10.72.97.102 – 10.72.97.102	10.72.97.102
104	10.72.97.103/32	10.72.97.103 – 10.72.97.103	10.72.97.103
105	10.72.97.104/32	10.72.97.104 – 10.72.97.104	10.72.97.104
106	10.72.97.105/32	10.72.97.105 – 10.72.97.105	10.72.97.105
107	10.72.97.106/32	10.72.97.106 – 10.72.97.106	10.72.97.106
108	10.72.97.107/32	10.72.97.107 – 10.72.97.107	10.72.97.107
109	10.72.97.108/32	10.72.97.108 – 10.72.97.108	10.72.97.108
110	10.72.97.109/32	10.72.97.109 – 10.72.97.109	10.72.97.109
111	10.72.97.110/32	10.72.97.110 – 10.72.97.110	10.72.97.110
112	10.72.97.111/32	10.72.97.111 – 10.72.97.111	10.72.97.111
113	10.72.97.112/32	10.72.97.112 – 10.72.97.112	10.72.97.112
114	10.72.97.113/32	10.72.97.113 – 10.72.97.113	10.72.97.113
115	10.72.97.114/32	10.72.97.114 – 10.72.97.114	10.72.97.114
116	10.72.97.115/32	10.72.97.115 – 10.72.97.115	10.72.97.115
117	10.72.97.116/32	10.72.97.116 – 10.72.97.116	10.72.97.116
118	10.72.97.117/32	10.72.97.117 – 10.72.97.117	10.72.97.117
119	10.72.97.118/32	10.72.97.118 – 10.72.97.118	10.72.97.118
120	10.72.97.119/32	10.72.97.119 – 10.72.97.119	10.72.97.119
121	10.72.97.120/32	10.72.97.120 – 10.72.97.120	10.72.97.120
122	10.72.97.121/32	10.72.97.121 – 10.72.97.121	10.72.97.121
123	10.72.97.122/32	10.72.97.122 – 10.72.97.122	10.72.97.122
124	10.72.97.123/32	10.72.97.123 – 10.72.97.123	10.72.97.123
125	10.72.97.124/32	10.72.97.124 – 10.72.97.124	10.72.97.124
126	10.72.97.125/32	10.72.97.125 – 10.72.97.125	10.72.97.125
127	10.72.97.126/32	10.72.97.126 – 10.72.97.126	10.72.97.126
128	10.72.97.127/32	10.72.97.127 – 10.72.97.127	10.72.97.127
129	10.72.97.128/32	10.72.97.128 – 10.72.97.128	10.72.97.128
130	10.72.97.129/32	10.72.97.129 – 10.72.97.129	10.72.97.129
131	10.72.97.130/32	10.72.97.130 – 10.72.97.130	10.72.97.130
132	10.72.97.131/32	10.72.97.131 – 10.72.97.131	10.72.97.131
133	10.72.97.132/32	10.72.97.132 – 10.72.97.132	10.72.97.132
134	10.72.97.133/32	10.72.97.133 – 10.72.97.133	10.72.97.133
135	10.72.97.134/32	10.72.97.134 – 10.72.97.134	10.72.97.134
136	10.72.97.135/32	10.72.97.135 – 10.72.97.135	10.72.97.135
137	10.72.97.136/32	10.72.97.136 – 10.72.97.136	10.72.97.136
138	10.72.97.137/32	10.72.97.137 – 10.72.97.137	10.72.97.137
139	10.72.97.138/32	10.72.97.138 – 10.72.97.138	10.72.97.138
140	10.72.97.139/32	10.72.97.139 – 10.72.97.139	10.72.97.139
141	10.72.97.140/32	10.72.97.140 – 10.72.97.140	10.72.97.140
142	10.72.97.141/32	10.72.97.141 – 10.72.97.141	10.72.97.141
143	10.72.97.142/32	10.72.97.142 – 10.72.97.142	10.72.97.142
144	10.72.97.143/32	10.72.97.143 – 10.72.97.143	10.72.97.143
145	10.72.97.144/32	10.72.97.144 – 10.72.97.144	10.72.97.144
146	10.72.97.145/32	10.72.97.145 – 10.72.97.145	10.72.97.145
147	10.72.97.146/32	10.72.97.146 – 10.72.97.146	10.72.97.146
148	10.72.97.147/32	10.72.97.147 – 10.72.97.147	10.72.97.147
149	10.72.97.148/32	10.72.97.148 – 10.72.97.148	10.72.97.148
150	10.72.97.149/32	10.72.97.149 – 10.72.97.149	10.72.97.149
151	10.72.97.150/32	10.72.97.150 – 10.72.97.150	10.72.97.150
152	10.72.97.151/32	10.72.97.151 – 10.72.97.151	10.72.97.151
153	10.72.97.152/32	10.72.97.152 – 10.72.97.152	10.72.97.152
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156	10.72.97.155/32	10.72.97.155 – 10.72.97.155	10.72.97.155
157	10.72.97.156/32	10.72.97.156 – 10.72.97.156	10.72.97.156
158	10.72.97.157/32	10.72.97.157 – 10.72.97.157	10.72.97.157
159	10.72.97.158/32	10.72.97.158 – 10.72.97.158	10.72.97.158
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210	10.72.97.209/32	10.72.97.209 – 10.72.97.209	10.72.97.209
211	10.72.97.210/32	10.72.97.210 – 10.72.97.210	10.72.97.210
212	10.72.97.211/32	10.72.97.211 – 10.72.97.211	10.72.97.211
213	10.72.97.212/32	10.72.97.212 – 10.72.97.212	10.72.97.212
214	10.72.97.213/32	10.72.97.213 – 10.72.97.213	10.72.97.213
215	10.72.97.214/32	10.72.97.214 – 10.72.97.214	10.72.97.214
216	10.72.97.215/32	10.72.97.215 – 10.72.97.215	10.72.97.215
217	10.72.97.216/32	10.72.97.216 – 10.72.97.216	10.72.97.216
218	10.72.97.217/32	10.72.97.217 – 10.72.97.217	10.72.97.217
219	10.72.97.218/32	10.72.97.218 – 10.72.97.218	10.72.97.218
220	10.72.97.219/32	10.72.97.219 – 10.72.97.219	10.72.97.219
221	10.72.97.220/32	10.72.97.220 – 10.72.97.220	10.72.97.220
222	10.72.97.221/32	10.72.97.221 – 10.72.97.221	10.72.97.221
223	10.72.97.222/32	10.72.97.222 – 10.72.97.222	10.72.97.222
224	10.72.97.223/32	10.72.97.223 – 10.72.97.223	10.72.97.223
225	10.72.97.224/32	10.72.97.224 – 10.72.97.224	10.72.97.224
226	10.72.97.225/32	10.72.97.225 – 10.72.97.225	10.72.97.225
227	10.72.97.226/32	10.72.97.226 – 10.72.97.226	10.72.97.226
228	10.72.97.227/32	10.72.97.227 – 10.72.97.227	10.72.97.227
229	10.72.97.228/32	10.72.97.228 – 10.72.97.228	10.72.97.228
230	10.72.97.229/32	10.72.97.229 – 10.72.97.229	10.72.97.229
231	10.72.97.230/32	10.72.97.230 – 10.72.97.230	10.72.97.230
232	10.72.97.231/32	10.72.97.231 – 10.72.97.231	10.72.97.231
233	10.72.97.232/32	10.72.97.232 – 10.72.97.232	10.72.97.232
234	10.72.97.233/32	10.72.97.233 – 10.72.97.233	10.72.97.233
235	10.72.97.234/32	10.72.97.234 – 10.72.97.234	10.72.97.234
236	10.72.97.235/32	10.72.97.235 – 10.72.97.235	10.72.97.235
237	10.72.97.236/32	10.72.97.236 – 10.72.97.236	10.72.97.236
238	10.72.97.237/32	10.72.97.237 – 10.72.97.237	10.72.97.237
239	10.72.97.238/32	10.72.97.238 – 10.72.97.238	10.72.97.238
240	10.72.97.239/32	10.72.97.239 – 10.72.97.239	10.72.97.239
241	10.72.97.240/32	10.72.97.240 – 10.72.97.240	10.72.97.240
242	10.72.97.241/32	10.72.97.241 – 10.72.97.241	10.72.97.241
243	10.72.97.242/32	10.72.97.242 – 10.72.97.242	10.72.97.242
244	10.72.97.243/32	10.72.97.243 – 10.72.97.243	10.72.97.243
245	10.72.97.244/32	10.72.97.244 – 10.72.97.244	10.72.97.244
246	10.72.97.245/32	10.72.97.245 – 10.72.97.245	10.72.97.245
247	10.72.97.246/32	10.72.97.246 – 10.72.97.246	10.72.97.246
248	10.72.97.247/32	10.72.97.247 – 10.72.97.247	10.72.97.247
249	10.72.97.248/32	10.72.97.248 – 10.72.97.248	10.72.97.248
250	10.72.97.249/32	10.72.97.249 – 10.72.97.249	10.72.97.249
251	10.72.97.250/32	10.72.97.250 – 10.72.97.250	10.72.97.250
252	10.72.97.251/32	10.72.97.251 – 10.72.97.251	10.72.97.251
253	10.72.97.252/32	10.72.97.252 – 10.72.97.252	10.72.97.252
254	10.72.97.253/32	10.72.97.253 – 10.72.97.253	10.72.97.253
255	10.72.97.254/32	10.72.97.254 – 10.72.97.254	10.72.97.254
256	10.72.97.255/32	10.72.97.255 – 10.72.97.255	10.72.97.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /24
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	1
/25	255.255.255.128	128	126	2 split →
/26	255.255.255.192	64	62	4 split →
/27	255.255.255.224	32	30	8 split →
/28	255.255.255.240	16	14	16 split →
/29	255.255.255.248	8	6	32 split →
/30	255.255.255.252	4	2	64 split →
/31	255.255.255.254	2	2	128 split →
/32	255.255.255.255	1	1	256 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →