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)10.71.22.0/23

network10.71.22.0/23

broadcast10.71.23.255

first host10.71.22.1

last host10.71.23.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.71.22.0/23

address00001010.01000111.00010110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01000111.00010110.00000000

broadcast00001010.01000111.00010111.11111111

green = network part, grey = host part

hex0x0a471600

decimal172430848

reverse dns0.22.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:1600

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.71.22.0/32	10.71.22.0 – 10.71.22.0	10.71.22.0
2	10.71.22.1/32	10.71.22.1 – 10.71.22.1	10.71.22.1
3	10.71.22.2/32	10.71.22.2 – 10.71.22.2	10.71.22.2
4	10.71.22.3/32	10.71.22.3 – 10.71.22.3	10.71.22.3
5	10.71.22.4/32	10.71.22.4 – 10.71.22.4	10.71.22.4
6	10.71.22.5/32	10.71.22.5 – 10.71.22.5	10.71.22.5
7	10.71.22.6/32	10.71.22.6 – 10.71.22.6	10.71.22.6
8	10.71.22.7/32	10.71.22.7 – 10.71.22.7	10.71.22.7
9	10.71.22.8/32	10.71.22.8 – 10.71.22.8	10.71.22.8
10	10.71.22.9/32	10.71.22.9 – 10.71.22.9	10.71.22.9
11	10.71.22.10/32	10.71.22.10 – 10.71.22.10	10.71.22.10
12	10.71.22.11/32	10.71.22.11 – 10.71.22.11	10.71.22.11
13	10.71.22.12/32	10.71.22.12 – 10.71.22.12	10.71.22.12
14	10.71.22.13/32	10.71.22.13 – 10.71.22.13	10.71.22.13
15	10.71.22.14/32	10.71.22.14 – 10.71.22.14	10.71.22.14
16	10.71.22.15/32	10.71.22.15 – 10.71.22.15	10.71.22.15
17	10.71.22.16/32	10.71.22.16 – 10.71.22.16	10.71.22.16
18	10.71.22.17/32	10.71.22.17 – 10.71.22.17	10.71.22.17
19	10.71.22.18/32	10.71.22.18 – 10.71.22.18	10.71.22.18
20	10.71.22.19/32	10.71.22.19 – 10.71.22.19	10.71.22.19
21	10.71.22.20/32	10.71.22.20 – 10.71.22.20	10.71.22.20
22	10.71.22.21/32	10.71.22.21 – 10.71.22.21	10.71.22.21
23	10.71.22.22/32	10.71.22.22 – 10.71.22.22	10.71.22.22
24	10.71.22.23/32	10.71.22.23 – 10.71.22.23	10.71.22.23
25	10.71.22.24/32	10.71.22.24 – 10.71.22.24	10.71.22.24
26	10.71.22.25/32	10.71.22.25 – 10.71.22.25	10.71.22.25
27	10.71.22.26/32	10.71.22.26 – 10.71.22.26	10.71.22.26
28	10.71.22.27/32	10.71.22.27 – 10.71.22.27	10.71.22.27
29	10.71.22.28/32	10.71.22.28 – 10.71.22.28	10.71.22.28
30	10.71.22.29/32	10.71.22.29 – 10.71.22.29	10.71.22.29
31	10.71.22.30/32	10.71.22.30 – 10.71.22.30	10.71.22.30
32	10.71.22.31/32	10.71.22.31 – 10.71.22.31	10.71.22.31
33	10.71.22.32/32	10.71.22.32 – 10.71.22.32	10.71.22.32
34	10.71.22.33/32	10.71.22.33 – 10.71.22.33	10.71.22.33
35	10.71.22.34/32	10.71.22.34 – 10.71.22.34	10.71.22.34
36	10.71.22.35/32	10.71.22.35 – 10.71.22.35	10.71.22.35
37	10.71.22.36/32	10.71.22.36 – 10.71.22.36	10.71.22.36
38	10.71.22.37/32	10.71.22.37 – 10.71.22.37	10.71.22.37
39	10.71.22.38/32	10.71.22.38 – 10.71.22.38	10.71.22.38
40	10.71.22.39/32	10.71.22.39 – 10.71.22.39	10.71.22.39
41	10.71.22.40/32	10.71.22.40 – 10.71.22.40	10.71.22.40
42	10.71.22.41/32	10.71.22.41 – 10.71.22.41	10.71.22.41
43	10.71.22.42/32	10.71.22.42 – 10.71.22.42	10.71.22.42
44	10.71.22.43/32	10.71.22.43 – 10.71.22.43	10.71.22.43
45	10.71.22.44/32	10.71.22.44 – 10.71.22.44	10.71.22.44
46	10.71.22.45/32	10.71.22.45 – 10.71.22.45	10.71.22.45
47	10.71.22.46/32	10.71.22.46 – 10.71.22.46	10.71.22.46
48	10.71.22.47/32	10.71.22.47 – 10.71.22.47	10.71.22.47
49	10.71.22.48/32	10.71.22.48 – 10.71.22.48	10.71.22.48
50	10.71.22.49/32	10.71.22.49 – 10.71.22.49	10.71.22.49
51	10.71.22.50/32	10.71.22.50 – 10.71.22.50	10.71.22.50
52	10.71.22.51/32	10.71.22.51 – 10.71.22.51	10.71.22.51
53	10.71.22.52/32	10.71.22.52 – 10.71.22.52	10.71.22.52
54	10.71.22.53/32	10.71.22.53 – 10.71.22.53	10.71.22.53
55	10.71.22.54/32	10.71.22.54 – 10.71.22.54	10.71.22.54
56	10.71.22.55/32	10.71.22.55 – 10.71.22.55	10.71.22.55
57	10.71.22.56/32	10.71.22.56 – 10.71.22.56	10.71.22.56
58	10.71.22.57/32	10.71.22.57 – 10.71.22.57	10.71.22.57
59	10.71.22.58/32	10.71.22.58 – 10.71.22.58	10.71.22.58
60	10.71.22.59/32	10.71.22.59 – 10.71.22.59	10.71.22.59
61	10.71.22.60/32	10.71.22.60 – 10.71.22.60	10.71.22.60
62	10.71.22.61/32	10.71.22.61 – 10.71.22.61	10.71.22.61
63	10.71.22.62/32	10.71.22.62 – 10.71.22.62	10.71.22.62
64	10.71.22.63/32	10.71.22.63 – 10.71.22.63	10.71.22.63
65	10.71.22.64/32	10.71.22.64 – 10.71.22.64	10.71.22.64
66	10.71.22.65/32	10.71.22.65 – 10.71.22.65	10.71.22.65
67	10.71.22.66/32	10.71.22.66 – 10.71.22.66	10.71.22.66
68	10.71.22.67/32	10.71.22.67 – 10.71.22.67	10.71.22.67
69	10.71.22.68/32	10.71.22.68 – 10.71.22.68	10.71.22.68
70	10.71.22.69/32	10.71.22.69 – 10.71.22.69	10.71.22.69
71	10.71.22.70/32	10.71.22.70 – 10.71.22.70	10.71.22.70
72	10.71.22.71/32	10.71.22.71 – 10.71.22.71	10.71.22.71
73	10.71.22.72/32	10.71.22.72 – 10.71.22.72	10.71.22.72
74	10.71.22.73/32	10.71.22.73 – 10.71.22.73	10.71.22.73
75	10.71.22.74/32	10.71.22.74 – 10.71.22.74	10.71.22.74
76	10.71.22.75/32	10.71.22.75 – 10.71.22.75	10.71.22.75
77	10.71.22.76/32	10.71.22.76 – 10.71.22.76	10.71.22.76
78	10.71.22.77/32	10.71.22.77 – 10.71.22.77	10.71.22.77
79	10.71.22.78/32	10.71.22.78 – 10.71.22.78	10.71.22.78
80	10.71.22.79/32	10.71.22.79 – 10.71.22.79	10.71.22.79
81	10.71.22.80/32	10.71.22.80 – 10.71.22.80	10.71.22.80
82	10.71.22.81/32	10.71.22.81 – 10.71.22.81	10.71.22.81
83	10.71.22.82/32	10.71.22.82 – 10.71.22.82	10.71.22.82
84	10.71.22.83/32	10.71.22.83 – 10.71.22.83	10.71.22.83
85	10.71.22.84/32	10.71.22.84 – 10.71.22.84	10.71.22.84
86	10.71.22.85/32	10.71.22.85 – 10.71.22.85	10.71.22.85
87	10.71.22.86/32	10.71.22.86 – 10.71.22.86	10.71.22.86
88	10.71.22.87/32	10.71.22.87 – 10.71.22.87	10.71.22.87
89	10.71.22.88/32	10.71.22.88 – 10.71.22.88	10.71.22.88
90	10.71.22.89/32	10.71.22.89 – 10.71.22.89	10.71.22.89
91	10.71.22.90/32	10.71.22.90 – 10.71.22.90	10.71.22.90
92	10.71.22.91/32	10.71.22.91 – 10.71.22.91	10.71.22.91
93	10.71.22.92/32	10.71.22.92 – 10.71.22.92	10.71.22.92
94	10.71.22.93/32	10.71.22.93 – 10.71.22.93	10.71.22.93
95	10.71.22.94/32	10.71.22.94 – 10.71.22.94	10.71.22.94
96	10.71.22.95/32	10.71.22.95 – 10.71.22.95	10.71.22.95
97	10.71.22.96/32	10.71.22.96 – 10.71.22.96	10.71.22.96
98	10.71.22.97/32	10.71.22.97 – 10.71.22.97	10.71.22.97
99	10.71.22.98/32	10.71.22.98 – 10.71.22.98	10.71.22.98
100	10.71.22.99/32	10.71.22.99 – 10.71.22.99	10.71.22.99
101	10.71.22.100/32	10.71.22.100 – 10.71.22.100	10.71.22.100
102	10.71.22.101/32	10.71.22.101 – 10.71.22.101	10.71.22.101
103	10.71.22.102/32	10.71.22.102 – 10.71.22.102	10.71.22.102
104	10.71.22.103/32	10.71.22.103 – 10.71.22.103	10.71.22.103
105	10.71.22.104/32	10.71.22.104 – 10.71.22.104	10.71.22.104
106	10.71.22.105/32	10.71.22.105 – 10.71.22.105	10.71.22.105
107	10.71.22.106/32	10.71.22.106 – 10.71.22.106	10.71.22.106
108	10.71.22.107/32	10.71.22.107 – 10.71.22.107	10.71.22.107
109	10.71.22.108/32	10.71.22.108 – 10.71.22.108	10.71.22.108
110	10.71.22.109/32	10.71.22.109 – 10.71.22.109	10.71.22.109
111	10.71.22.110/32	10.71.22.110 – 10.71.22.110	10.71.22.110
112	10.71.22.111/32	10.71.22.111 – 10.71.22.111	10.71.22.111
113	10.71.22.112/32	10.71.22.112 – 10.71.22.112	10.71.22.112
114	10.71.22.113/32	10.71.22.113 – 10.71.22.113	10.71.22.113
115	10.71.22.114/32	10.71.22.114 – 10.71.22.114	10.71.22.114
116	10.71.22.115/32	10.71.22.115 – 10.71.22.115	10.71.22.115
117	10.71.22.116/32	10.71.22.116 – 10.71.22.116	10.71.22.116
118	10.71.22.117/32	10.71.22.117 – 10.71.22.117	10.71.22.117
119	10.71.22.118/32	10.71.22.118 – 10.71.22.118	10.71.22.118
120	10.71.22.119/32	10.71.22.119 – 10.71.22.119	10.71.22.119
121	10.71.22.120/32	10.71.22.120 – 10.71.22.120	10.71.22.120
122	10.71.22.121/32	10.71.22.121 – 10.71.22.121	10.71.22.121
123	10.71.22.122/32	10.71.22.122 – 10.71.22.122	10.71.22.122
124	10.71.22.123/32	10.71.22.123 – 10.71.22.123	10.71.22.123
125	10.71.22.124/32	10.71.22.124 – 10.71.22.124	10.71.22.124
126	10.71.22.125/32	10.71.22.125 – 10.71.22.125	10.71.22.125
127	10.71.22.126/32	10.71.22.126 – 10.71.22.126	10.71.22.126
128	10.71.22.127/32	10.71.22.127 – 10.71.22.127	10.71.22.127
129	10.71.22.128/32	10.71.22.128 – 10.71.22.128	10.71.22.128
130	10.71.22.129/32	10.71.22.129 – 10.71.22.129	10.71.22.129
131	10.71.22.130/32	10.71.22.130 – 10.71.22.130	10.71.22.130
132	10.71.22.131/32	10.71.22.131 – 10.71.22.131	10.71.22.131
133	10.71.22.132/32	10.71.22.132 – 10.71.22.132	10.71.22.132
134	10.71.22.133/32	10.71.22.133 – 10.71.22.133	10.71.22.133
135	10.71.22.134/32	10.71.22.134 – 10.71.22.134	10.71.22.134
136	10.71.22.135/32	10.71.22.135 – 10.71.22.135	10.71.22.135
137	10.71.22.136/32	10.71.22.136 – 10.71.22.136	10.71.22.136
138	10.71.22.137/32	10.71.22.137 – 10.71.22.137	10.71.22.137
139	10.71.22.138/32	10.71.22.138 – 10.71.22.138	10.71.22.138
140	10.71.22.139/32	10.71.22.139 – 10.71.22.139	10.71.22.139
141	10.71.22.140/32	10.71.22.140 – 10.71.22.140	10.71.22.140
142	10.71.22.141/32	10.71.22.141 – 10.71.22.141	10.71.22.141
143	10.71.22.142/32	10.71.22.142 – 10.71.22.142	10.71.22.142
144	10.71.22.143/32	10.71.22.143 – 10.71.22.143	10.71.22.143
145	10.71.22.144/32	10.71.22.144 – 10.71.22.144	10.71.22.144
146	10.71.22.145/32	10.71.22.145 – 10.71.22.145	10.71.22.145
147	10.71.22.146/32	10.71.22.146 – 10.71.22.146	10.71.22.146
148	10.71.22.147/32	10.71.22.147 – 10.71.22.147	10.71.22.147
149	10.71.22.148/32	10.71.22.148 – 10.71.22.148	10.71.22.148
150	10.71.22.149/32	10.71.22.149 – 10.71.22.149	10.71.22.149
151	10.71.22.150/32	10.71.22.150 – 10.71.22.150	10.71.22.150
152	10.71.22.151/32	10.71.22.151 – 10.71.22.151	10.71.22.151
153	10.71.22.152/32	10.71.22.152 – 10.71.22.152	10.71.22.152
154	10.71.22.153/32	10.71.22.153 – 10.71.22.153	10.71.22.153
155	10.71.22.154/32	10.71.22.154 – 10.71.22.154	10.71.22.154
156	10.71.22.155/32	10.71.22.155 – 10.71.22.155	10.71.22.155
157	10.71.22.156/32	10.71.22.156 – 10.71.22.156	10.71.22.156
158	10.71.22.157/32	10.71.22.157 – 10.71.22.157	10.71.22.157
159	10.71.22.158/32	10.71.22.158 – 10.71.22.158	10.71.22.158
160	10.71.22.159/32	10.71.22.159 – 10.71.22.159	10.71.22.159
161	10.71.22.160/32	10.71.22.160 – 10.71.22.160	10.71.22.160
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163	10.71.22.162/32	10.71.22.162 – 10.71.22.162	10.71.22.162
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168	10.71.22.167/32	10.71.22.167 – 10.71.22.167	10.71.22.167
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170	10.71.22.169/32	10.71.22.169 – 10.71.22.169	10.71.22.169
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210	10.71.22.209/32	10.71.22.209 – 10.71.22.209	10.71.22.209
211	10.71.22.210/32	10.71.22.210 – 10.71.22.210	10.71.22.210
212	10.71.22.211/32	10.71.22.211 – 10.71.22.211	10.71.22.211
213	10.71.22.212/32	10.71.22.212 – 10.71.22.212	10.71.22.212
214	10.71.22.213/32	10.71.22.213 – 10.71.22.213	10.71.22.213
215	10.71.22.214/32	10.71.22.214 – 10.71.22.214	10.71.22.214
216	10.71.22.215/32	10.71.22.215 – 10.71.22.215	10.71.22.215
217	10.71.22.216/32	10.71.22.216 – 10.71.22.216	10.71.22.216
218	10.71.22.217/32	10.71.22.217 – 10.71.22.217	10.71.22.217
219	10.71.22.218/32	10.71.22.218 – 10.71.22.218	10.71.22.218
220	10.71.22.219/32	10.71.22.219 – 10.71.22.219	10.71.22.219
221	10.71.22.220/32	10.71.22.220 – 10.71.22.220	10.71.22.220
222	10.71.22.221/32	10.71.22.221 – 10.71.22.221	10.71.22.221
223	10.71.22.222/32	10.71.22.222 – 10.71.22.222	10.71.22.222
224	10.71.22.223/32	10.71.22.223 – 10.71.22.223	10.71.22.223
225	10.71.22.224/32	10.71.22.224 – 10.71.22.224	10.71.22.224
226	10.71.22.225/32	10.71.22.225 – 10.71.22.225	10.71.22.225
227	10.71.22.226/32	10.71.22.226 – 10.71.22.226	10.71.22.226
228	10.71.22.227/32	10.71.22.227 – 10.71.22.227	10.71.22.227
229	10.71.22.228/32	10.71.22.228 – 10.71.22.228	10.71.22.228
230	10.71.22.229/32	10.71.22.229 – 10.71.22.229	10.71.22.229
231	10.71.22.230/32	10.71.22.230 – 10.71.22.230	10.71.22.230
232	10.71.22.231/32	10.71.22.231 – 10.71.22.231	10.71.22.231
233	10.71.22.232/32	10.71.22.232 – 10.71.22.232	10.71.22.232
234	10.71.22.233/32	10.71.22.233 – 10.71.22.233	10.71.22.233
235	10.71.22.234/32	10.71.22.234 – 10.71.22.234	10.71.22.234
236	10.71.22.235/32	10.71.22.235 – 10.71.22.235	10.71.22.235
237	10.71.22.236/32	10.71.22.236 – 10.71.22.236	10.71.22.236
238	10.71.22.237/32	10.71.22.237 – 10.71.22.237	10.71.22.237
239	10.71.22.238/32	10.71.22.238 – 10.71.22.238	10.71.22.238
240	10.71.22.239/32	10.71.22.239 – 10.71.22.239	10.71.22.239
241	10.71.22.240/32	10.71.22.240 – 10.71.22.240	10.71.22.240
242	10.71.22.241/32	10.71.22.241 – 10.71.22.241	10.71.22.241
243	10.71.22.242/32	10.71.22.242 – 10.71.22.242	10.71.22.242
244	10.71.22.243/32	10.71.22.243 – 10.71.22.243	10.71.22.243
245	10.71.22.244/32	10.71.22.244 – 10.71.22.244	10.71.22.244
246	10.71.22.245/32	10.71.22.245 – 10.71.22.245	10.71.22.245
247	10.71.22.246/32	10.71.22.246 – 10.71.22.246	10.71.22.246
248	10.71.22.247/32	10.71.22.247 – 10.71.22.247	10.71.22.247
249	10.71.22.248/32	10.71.22.248 – 10.71.22.248	10.71.22.248
250	10.71.22.249/32	10.71.22.249 – 10.71.22.249	10.71.22.249
251	10.71.22.250/32	10.71.22.250 – 10.71.22.250	10.71.22.250
252	10.71.22.251/32	10.71.22.251 – 10.71.22.251	10.71.22.251
253	10.71.22.252/32	10.71.22.252 – 10.71.22.252	10.71.22.252
254	10.71.22.253/32	10.71.22.253 – 10.71.22.253	10.71.22.253
255	10.71.22.254/32	10.71.22.254 – 10.71.22.254	10.71.22.254
256	10.71.22.255/32	10.71.22.255 – 10.71.22.255	10.71.22.255

showing 256 of 512

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →