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)10.71.211.0/24

network10.71.211.0/24

broadcast10.71.211.255

first host10.71.211.1

last host10.71.211.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.71.211.0/24

address00001010.01000111.11010011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01000111.11010011.00000000

broadcast00001010.01000111.11010011.11111111

green = network part, grey = host part

hex0x0a47d300

decimal172479232

reverse dns0.211.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:d300

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.71.211.0/32	10.71.211.0 – 10.71.211.0	10.71.211.0
2	10.71.211.1/32	10.71.211.1 – 10.71.211.1	10.71.211.1
3	10.71.211.2/32	10.71.211.2 – 10.71.211.2	10.71.211.2
4	10.71.211.3/32	10.71.211.3 – 10.71.211.3	10.71.211.3
5	10.71.211.4/32	10.71.211.4 – 10.71.211.4	10.71.211.4
6	10.71.211.5/32	10.71.211.5 – 10.71.211.5	10.71.211.5
7	10.71.211.6/32	10.71.211.6 – 10.71.211.6	10.71.211.6
8	10.71.211.7/32	10.71.211.7 – 10.71.211.7	10.71.211.7
9	10.71.211.8/32	10.71.211.8 – 10.71.211.8	10.71.211.8
10	10.71.211.9/32	10.71.211.9 – 10.71.211.9	10.71.211.9
11	10.71.211.10/32	10.71.211.10 – 10.71.211.10	10.71.211.10
12	10.71.211.11/32	10.71.211.11 – 10.71.211.11	10.71.211.11
13	10.71.211.12/32	10.71.211.12 – 10.71.211.12	10.71.211.12
14	10.71.211.13/32	10.71.211.13 – 10.71.211.13	10.71.211.13
15	10.71.211.14/32	10.71.211.14 – 10.71.211.14	10.71.211.14
16	10.71.211.15/32	10.71.211.15 – 10.71.211.15	10.71.211.15
17	10.71.211.16/32	10.71.211.16 – 10.71.211.16	10.71.211.16
18	10.71.211.17/32	10.71.211.17 – 10.71.211.17	10.71.211.17
19	10.71.211.18/32	10.71.211.18 – 10.71.211.18	10.71.211.18
20	10.71.211.19/32	10.71.211.19 – 10.71.211.19	10.71.211.19
21	10.71.211.20/32	10.71.211.20 – 10.71.211.20	10.71.211.20
22	10.71.211.21/32	10.71.211.21 – 10.71.211.21	10.71.211.21
23	10.71.211.22/32	10.71.211.22 – 10.71.211.22	10.71.211.22
24	10.71.211.23/32	10.71.211.23 – 10.71.211.23	10.71.211.23
25	10.71.211.24/32	10.71.211.24 – 10.71.211.24	10.71.211.24
26	10.71.211.25/32	10.71.211.25 – 10.71.211.25	10.71.211.25
27	10.71.211.26/32	10.71.211.26 – 10.71.211.26	10.71.211.26
28	10.71.211.27/32	10.71.211.27 – 10.71.211.27	10.71.211.27
29	10.71.211.28/32	10.71.211.28 – 10.71.211.28	10.71.211.28
30	10.71.211.29/32	10.71.211.29 – 10.71.211.29	10.71.211.29
31	10.71.211.30/32	10.71.211.30 – 10.71.211.30	10.71.211.30
32	10.71.211.31/32	10.71.211.31 – 10.71.211.31	10.71.211.31
33	10.71.211.32/32	10.71.211.32 – 10.71.211.32	10.71.211.32
34	10.71.211.33/32	10.71.211.33 – 10.71.211.33	10.71.211.33
35	10.71.211.34/32	10.71.211.34 – 10.71.211.34	10.71.211.34
36	10.71.211.35/32	10.71.211.35 – 10.71.211.35	10.71.211.35
37	10.71.211.36/32	10.71.211.36 – 10.71.211.36	10.71.211.36
38	10.71.211.37/32	10.71.211.37 – 10.71.211.37	10.71.211.37
39	10.71.211.38/32	10.71.211.38 – 10.71.211.38	10.71.211.38
40	10.71.211.39/32	10.71.211.39 – 10.71.211.39	10.71.211.39
41	10.71.211.40/32	10.71.211.40 – 10.71.211.40	10.71.211.40
42	10.71.211.41/32	10.71.211.41 – 10.71.211.41	10.71.211.41
43	10.71.211.42/32	10.71.211.42 – 10.71.211.42	10.71.211.42
44	10.71.211.43/32	10.71.211.43 – 10.71.211.43	10.71.211.43
45	10.71.211.44/32	10.71.211.44 – 10.71.211.44	10.71.211.44
46	10.71.211.45/32	10.71.211.45 – 10.71.211.45	10.71.211.45
47	10.71.211.46/32	10.71.211.46 – 10.71.211.46	10.71.211.46
48	10.71.211.47/32	10.71.211.47 – 10.71.211.47	10.71.211.47
49	10.71.211.48/32	10.71.211.48 – 10.71.211.48	10.71.211.48
50	10.71.211.49/32	10.71.211.49 – 10.71.211.49	10.71.211.49
51	10.71.211.50/32	10.71.211.50 – 10.71.211.50	10.71.211.50
52	10.71.211.51/32	10.71.211.51 – 10.71.211.51	10.71.211.51
53	10.71.211.52/32	10.71.211.52 – 10.71.211.52	10.71.211.52
54	10.71.211.53/32	10.71.211.53 – 10.71.211.53	10.71.211.53
55	10.71.211.54/32	10.71.211.54 – 10.71.211.54	10.71.211.54
56	10.71.211.55/32	10.71.211.55 – 10.71.211.55	10.71.211.55
57	10.71.211.56/32	10.71.211.56 – 10.71.211.56	10.71.211.56
58	10.71.211.57/32	10.71.211.57 – 10.71.211.57	10.71.211.57
59	10.71.211.58/32	10.71.211.58 – 10.71.211.58	10.71.211.58
60	10.71.211.59/32	10.71.211.59 – 10.71.211.59	10.71.211.59
61	10.71.211.60/32	10.71.211.60 – 10.71.211.60	10.71.211.60
62	10.71.211.61/32	10.71.211.61 – 10.71.211.61	10.71.211.61
63	10.71.211.62/32	10.71.211.62 – 10.71.211.62	10.71.211.62
64	10.71.211.63/32	10.71.211.63 – 10.71.211.63	10.71.211.63
65	10.71.211.64/32	10.71.211.64 – 10.71.211.64	10.71.211.64
66	10.71.211.65/32	10.71.211.65 – 10.71.211.65	10.71.211.65
67	10.71.211.66/32	10.71.211.66 – 10.71.211.66	10.71.211.66
68	10.71.211.67/32	10.71.211.67 – 10.71.211.67	10.71.211.67
69	10.71.211.68/32	10.71.211.68 – 10.71.211.68	10.71.211.68
70	10.71.211.69/32	10.71.211.69 – 10.71.211.69	10.71.211.69
71	10.71.211.70/32	10.71.211.70 – 10.71.211.70	10.71.211.70
72	10.71.211.71/32	10.71.211.71 – 10.71.211.71	10.71.211.71
73	10.71.211.72/32	10.71.211.72 – 10.71.211.72	10.71.211.72
74	10.71.211.73/32	10.71.211.73 – 10.71.211.73	10.71.211.73
75	10.71.211.74/32	10.71.211.74 – 10.71.211.74	10.71.211.74
76	10.71.211.75/32	10.71.211.75 – 10.71.211.75	10.71.211.75
77	10.71.211.76/32	10.71.211.76 – 10.71.211.76	10.71.211.76
78	10.71.211.77/32	10.71.211.77 – 10.71.211.77	10.71.211.77
79	10.71.211.78/32	10.71.211.78 – 10.71.211.78	10.71.211.78
80	10.71.211.79/32	10.71.211.79 – 10.71.211.79	10.71.211.79
81	10.71.211.80/32	10.71.211.80 – 10.71.211.80	10.71.211.80
82	10.71.211.81/32	10.71.211.81 – 10.71.211.81	10.71.211.81
83	10.71.211.82/32	10.71.211.82 – 10.71.211.82	10.71.211.82
84	10.71.211.83/32	10.71.211.83 – 10.71.211.83	10.71.211.83
85	10.71.211.84/32	10.71.211.84 – 10.71.211.84	10.71.211.84
86	10.71.211.85/32	10.71.211.85 – 10.71.211.85	10.71.211.85
87	10.71.211.86/32	10.71.211.86 – 10.71.211.86	10.71.211.86
88	10.71.211.87/32	10.71.211.87 – 10.71.211.87	10.71.211.87
89	10.71.211.88/32	10.71.211.88 – 10.71.211.88	10.71.211.88
90	10.71.211.89/32	10.71.211.89 – 10.71.211.89	10.71.211.89
91	10.71.211.90/32	10.71.211.90 – 10.71.211.90	10.71.211.90
92	10.71.211.91/32	10.71.211.91 – 10.71.211.91	10.71.211.91
93	10.71.211.92/32	10.71.211.92 – 10.71.211.92	10.71.211.92
94	10.71.211.93/32	10.71.211.93 – 10.71.211.93	10.71.211.93
95	10.71.211.94/32	10.71.211.94 – 10.71.211.94	10.71.211.94
96	10.71.211.95/32	10.71.211.95 – 10.71.211.95	10.71.211.95
97	10.71.211.96/32	10.71.211.96 – 10.71.211.96	10.71.211.96
98	10.71.211.97/32	10.71.211.97 – 10.71.211.97	10.71.211.97
99	10.71.211.98/32	10.71.211.98 – 10.71.211.98	10.71.211.98
100	10.71.211.99/32	10.71.211.99 – 10.71.211.99	10.71.211.99
101	10.71.211.100/32	10.71.211.100 – 10.71.211.100	10.71.211.100
102	10.71.211.101/32	10.71.211.101 – 10.71.211.101	10.71.211.101
103	10.71.211.102/32	10.71.211.102 – 10.71.211.102	10.71.211.102
104	10.71.211.103/32	10.71.211.103 – 10.71.211.103	10.71.211.103
105	10.71.211.104/32	10.71.211.104 – 10.71.211.104	10.71.211.104
106	10.71.211.105/32	10.71.211.105 – 10.71.211.105	10.71.211.105
107	10.71.211.106/32	10.71.211.106 – 10.71.211.106	10.71.211.106
108	10.71.211.107/32	10.71.211.107 – 10.71.211.107	10.71.211.107
109	10.71.211.108/32	10.71.211.108 – 10.71.211.108	10.71.211.108
110	10.71.211.109/32	10.71.211.109 – 10.71.211.109	10.71.211.109
111	10.71.211.110/32	10.71.211.110 – 10.71.211.110	10.71.211.110
112	10.71.211.111/32	10.71.211.111 – 10.71.211.111	10.71.211.111
113	10.71.211.112/32	10.71.211.112 – 10.71.211.112	10.71.211.112
114	10.71.211.113/32	10.71.211.113 – 10.71.211.113	10.71.211.113
115	10.71.211.114/32	10.71.211.114 – 10.71.211.114	10.71.211.114
116	10.71.211.115/32	10.71.211.115 – 10.71.211.115	10.71.211.115
117	10.71.211.116/32	10.71.211.116 – 10.71.211.116	10.71.211.116
118	10.71.211.117/32	10.71.211.117 – 10.71.211.117	10.71.211.117
119	10.71.211.118/32	10.71.211.118 – 10.71.211.118	10.71.211.118
120	10.71.211.119/32	10.71.211.119 – 10.71.211.119	10.71.211.119
121	10.71.211.120/32	10.71.211.120 – 10.71.211.120	10.71.211.120
122	10.71.211.121/32	10.71.211.121 – 10.71.211.121	10.71.211.121
123	10.71.211.122/32	10.71.211.122 – 10.71.211.122	10.71.211.122
124	10.71.211.123/32	10.71.211.123 – 10.71.211.123	10.71.211.123
125	10.71.211.124/32	10.71.211.124 – 10.71.211.124	10.71.211.124
126	10.71.211.125/32	10.71.211.125 – 10.71.211.125	10.71.211.125
127	10.71.211.126/32	10.71.211.126 – 10.71.211.126	10.71.211.126
128	10.71.211.127/32	10.71.211.127 – 10.71.211.127	10.71.211.127
129	10.71.211.128/32	10.71.211.128 – 10.71.211.128	10.71.211.128
130	10.71.211.129/32	10.71.211.129 – 10.71.211.129	10.71.211.129
131	10.71.211.130/32	10.71.211.130 – 10.71.211.130	10.71.211.130
132	10.71.211.131/32	10.71.211.131 – 10.71.211.131	10.71.211.131
133	10.71.211.132/32	10.71.211.132 – 10.71.211.132	10.71.211.132
134	10.71.211.133/32	10.71.211.133 – 10.71.211.133	10.71.211.133
135	10.71.211.134/32	10.71.211.134 – 10.71.211.134	10.71.211.134
136	10.71.211.135/32	10.71.211.135 – 10.71.211.135	10.71.211.135
137	10.71.211.136/32	10.71.211.136 – 10.71.211.136	10.71.211.136
138	10.71.211.137/32	10.71.211.137 – 10.71.211.137	10.71.211.137
139	10.71.211.138/32	10.71.211.138 – 10.71.211.138	10.71.211.138
140	10.71.211.139/32	10.71.211.139 – 10.71.211.139	10.71.211.139
141	10.71.211.140/32	10.71.211.140 – 10.71.211.140	10.71.211.140
142	10.71.211.141/32	10.71.211.141 – 10.71.211.141	10.71.211.141
143	10.71.211.142/32	10.71.211.142 – 10.71.211.142	10.71.211.142
144	10.71.211.143/32	10.71.211.143 – 10.71.211.143	10.71.211.143
145	10.71.211.144/32	10.71.211.144 – 10.71.211.144	10.71.211.144
146	10.71.211.145/32	10.71.211.145 – 10.71.211.145	10.71.211.145
147	10.71.211.146/32	10.71.211.146 – 10.71.211.146	10.71.211.146
148	10.71.211.147/32	10.71.211.147 – 10.71.211.147	10.71.211.147
149	10.71.211.148/32	10.71.211.148 – 10.71.211.148	10.71.211.148
150	10.71.211.149/32	10.71.211.149 – 10.71.211.149	10.71.211.149
151	10.71.211.150/32	10.71.211.150 – 10.71.211.150	10.71.211.150
152	10.71.211.151/32	10.71.211.151 – 10.71.211.151	10.71.211.151
153	10.71.211.152/32	10.71.211.152 – 10.71.211.152	10.71.211.152
154	10.71.211.153/32	10.71.211.153 – 10.71.211.153	10.71.211.153
155	10.71.211.154/32	10.71.211.154 – 10.71.211.154	10.71.211.154
156	10.71.211.155/32	10.71.211.155 – 10.71.211.155	10.71.211.155
157	10.71.211.156/32	10.71.211.156 – 10.71.211.156	10.71.211.156
158	10.71.211.157/32	10.71.211.157 – 10.71.211.157	10.71.211.157
159	10.71.211.158/32	10.71.211.158 – 10.71.211.158	10.71.211.158
160	10.71.211.159/32	10.71.211.159 – 10.71.211.159	10.71.211.159
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210	10.71.211.209/32	10.71.211.209 – 10.71.211.209	10.71.211.209
211	10.71.211.210/32	10.71.211.210 – 10.71.211.210	10.71.211.210
212	10.71.211.211/32	10.71.211.211 – 10.71.211.211	10.71.211.211
213	10.71.211.212/32	10.71.211.212 – 10.71.211.212	10.71.211.212
214	10.71.211.213/32	10.71.211.213 – 10.71.211.213	10.71.211.213
215	10.71.211.214/32	10.71.211.214 – 10.71.211.214	10.71.211.214
216	10.71.211.215/32	10.71.211.215 – 10.71.211.215	10.71.211.215
217	10.71.211.216/32	10.71.211.216 – 10.71.211.216	10.71.211.216
218	10.71.211.217/32	10.71.211.217 – 10.71.211.217	10.71.211.217
219	10.71.211.218/32	10.71.211.218 – 10.71.211.218	10.71.211.218
220	10.71.211.219/32	10.71.211.219 – 10.71.211.219	10.71.211.219
221	10.71.211.220/32	10.71.211.220 – 10.71.211.220	10.71.211.220
222	10.71.211.221/32	10.71.211.221 – 10.71.211.221	10.71.211.221
223	10.71.211.222/32	10.71.211.222 – 10.71.211.222	10.71.211.222
224	10.71.211.223/32	10.71.211.223 – 10.71.211.223	10.71.211.223
225	10.71.211.224/32	10.71.211.224 – 10.71.211.224	10.71.211.224
226	10.71.211.225/32	10.71.211.225 – 10.71.211.225	10.71.211.225
227	10.71.211.226/32	10.71.211.226 – 10.71.211.226	10.71.211.226
228	10.71.211.227/32	10.71.211.227 – 10.71.211.227	10.71.211.227
229	10.71.211.228/32	10.71.211.228 – 10.71.211.228	10.71.211.228
230	10.71.211.229/32	10.71.211.229 – 10.71.211.229	10.71.211.229
231	10.71.211.230/32	10.71.211.230 – 10.71.211.230	10.71.211.230
232	10.71.211.231/32	10.71.211.231 – 10.71.211.231	10.71.211.231
233	10.71.211.232/32	10.71.211.232 – 10.71.211.232	10.71.211.232
234	10.71.211.233/32	10.71.211.233 – 10.71.211.233	10.71.211.233
235	10.71.211.234/32	10.71.211.234 – 10.71.211.234	10.71.211.234
236	10.71.211.235/32	10.71.211.235 – 10.71.211.235	10.71.211.235
237	10.71.211.236/32	10.71.211.236 – 10.71.211.236	10.71.211.236
238	10.71.211.237/32	10.71.211.237 – 10.71.211.237	10.71.211.237
239	10.71.211.238/32	10.71.211.238 – 10.71.211.238	10.71.211.238
240	10.71.211.239/32	10.71.211.239 – 10.71.211.239	10.71.211.239
241	10.71.211.240/32	10.71.211.240 – 10.71.211.240	10.71.211.240
242	10.71.211.241/32	10.71.211.241 – 10.71.211.241	10.71.211.241
243	10.71.211.242/32	10.71.211.242 – 10.71.211.242	10.71.211.242
244	10.71.211.243/32	10.71.211.243 – 10.71.211.243	10.71.211.243
245	10.71.211.244/32	10.71.211.244 – 10.71.211.244	10.71.211.244
246	10.71.211.245/32	10.71.211.245 – 10.71.211.245	10.71.211.245
247	10.71.211.246/32	10.71.211.246 – 10.71.211.246	10.71.211.246
248	10.71.211.247/32	10.71.211.247 – 10.71.211.247	10.71.211.247
249	10.71.211.248/32	10.71.211.248 – 10.71.211.248	10.71.211.248
250	10.71.211.249/32	10.71.211.249 – 10.71.211.249	10.71.211.249
251	10.71.211.250/32	10.71.211.250 – 10.71.211.250	10.71.211.250
252	10.71.211.251/32	10.71.211.251 – 10.71.211.251	10.71.211.251
253	10.71.211.252/32	10.71.211.252 – 10.71.211.252	10.71.211.252
254	10.71.211.253/32	10.71.211.253 – 10.71.211.253	10.71.211.253
255	10.71.211.254/32	10.71.211.254 – 10.71.211.254	10.71.211.254
256	10.71.211.255/32	10.71.211.255 – 10.71.211.255	10.71.211.255

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 →