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)10.71.46.0/23

network10.71.46.0/23

broadcast10.71.47.255

first host10.71.46.1

last host10.71.47.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.71.46.0/23

address00001010.01000111.00101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01000111.00101110.00000000

broadcast00001010.01000111.00101111.11111111

green = network part, grey = host part

hex0x0a472e00

decimal172436992

reverse dns0.46.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:2e00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.71.46.0/32	10.71.46.0 – 10.71.46.0	10.71.46.0
2	10.71.46.1/32	10.71.46.1 – 10.71.46.1	10.71.46.1
3	10.71.46.2/32	10.71.46.2 – 10.71.46.2	10.71.46.2
4	10.71.46.3/32	10.71.46.3 – 10.71.46.3	10.71.46.3
5	10.71.46.4/32	10.71.46.4 – 10.71.46.4	10.71.46.4
6	10.71.46.5/32	10.71.46.5 – 10.71.46.5	10.71.46.5
7	10.71.46.6/32	10.71.46.6 – 10.71.46.6	10.71.46.6
8	10.71.46.7/32	10.71.46.7 – 10.71.46.7	10.71.46.7
9	10.71.46.8/32	10.71.46.8 – 10.71.46.8	10.71.46.8
10	10.71.46.9/32	10.71.46.9 – 10.71.46.9	10.71.46.9
11	10.71.46.10/32	10.71.46.10 – 10.71.46.10	10.71.46.10
12	10.71.46.11/32	10.71.46.11 – 10.71.46.11	10.71.46.11
13	10.71.46.12/32	10.71.46.12 – 10.71.46.12	10.71.46.12
14	10.71.46.13/32	10.71.46.13 – 10.71.46.13	10.71.46.13
15	10.71.46.14/32	10.71.46.14 – 10.71.46.14	10.71.46.14
16	10.71.46.15/32	10.71.46.15 – 10.71.46.15	10.71.46.15
17	10.71.46.16/32	10.71.46.16 – 10.71.46.16	10.71.46.16
18	10.71.46.17/32	10.71.46.17 – 10.71.46.17	10.71.46.17
19	10.71.46.18/32	10.71.46.18 – 10.71.46.18	10.71.46.18
20	10.71.46.19/32	10.71.46.19 – 10.71.46.19	10.71.46.19
21	10.71.46.20/32	10.71.46.20 – 10.71.46.20	10.71.46.20
22	10.71.46.21/32	10.71.46.21 – 10.71.46.21	10.71.46.21
23	10.71.46.22/32	10.71.46.22 – 10.71.46.22	10.71.46.22
24	10.71.46.23/32	10.71.46.23 – 10.71.46.23	10.71.46.23
25	10.71.46.24/32	10.71.46.24 – 10.71.46.24	10.71.46.24
26	10.71.46.25/32	10.71.46.25 – 10.71.46.25	10.71.46.25
27	10.71.46.26/32	10.71.46.26 – 10.71.46.26	10.71.46.26
28	10.71.46.27/32	10.71.46.27 – 10.71.46.27	10.71.46.27
29	10.71.46.28/32	10.71.46.28 – 10.71.46.28	10.71.46.28
30	10.71.46.29/32	10.71.46.29 – 10.71.46.29	10.71.46.29
31	10.71.46.30/32	10.71.46.30 – 10.71.46.30	10.71.46.30
32	10.71.46.31/32	10.71.46.31 – 10.71.46.31	10.71.46.31
33	10.71.46.32/32	10.71.46.32 – 10.71.46.32	10.71.46.32
34	10.71.46.33/32	10.71.46.33 – 10.71.46.33	10.71.46.33
35	10.71.46.34/32	10.71.46.34 – 10.71.46.34	10.71.46.34
36	10.71.46.35/32	10.71.46.35 – 10.71.46.35	10.71.46.35
37	10.71.46.36/32	10.71.46.36 – 10.71.46.36	10.71.46.36
38	10.71.46.37/32	10.71.46.37 – 10.71.46.37	10.71.46.37
39	10.71.46.38/32	10.71.46.38 – 10.71.46.38	10.71.46.38
40	10.71.46.39/32	10.71.46.39 – 10.71.46.39	10.71.46.39
41	10.71.46.40/32	10.71.46.40 – 10.71.46.40	10.71.46.40
42	10.71.46.41/32	10.71.46.41 – 10.71.46.41	10.71.46.41
43	10.71.46.42/32	10.71.46.42 – 10.71.46.42	10.71.46.42
44	10.71.46.43/32	10.71.46.43 – 10.71.46.43	10.71.46.43
45	10.71.46.44/32	10.71.46.44 – 10.71.46.44	10.71.46.44
46	10.71.46.45/32	10.71.46.45 – 10.71.46.45	10.71.46.45
47	10.71.46.46/32	10.71.46.46 – 10.71.46.46	10.71.46.46
48	10.71.46.47/32	10.71.46.47 – 10.71.46.47	10.71.46.47
49	10.71.46.48/32	10.71.46.48 – 10.71.46.48	10.71.46.48
50	10.71.46.49/32	10.71.46.49 – 10.71.46.49	10.71.46.49
51	10.71.46.50/32	10.71.46.50 – 10.71.46.50	10.71.46.50
52	10.71.46.51/32	10.71.46.51 – 10.71.46.51	10.71.46.51
53	10.71.46.52/32	10.71.46.52 – 10.71.46.52	10.71.46.52
54	10.71.46.53/32	10.71.46.53 – 10.71.46.53	10.71.46.53
55	10.71.46.54/32	10.71.46.54 – 10.71.46.54	10.71.46.54
56	10.71.46.55/32	10.71.46.55 – 10.71.46.55	10.71.46.55
57	10.71.46.56/32	10.71.46.56 – 10.71.46.56	10.71.46.56
58	10.71.46.57/32	10.71.46.57 – 10.71.46.57	10.71.46.57
59	10.71.46.58/32	10.71.46.58 – 10.71.46.58	10.71.46.58
60	10.71.46.59/32	10.71.46.59 – 10.71.46.59	10.71.46.59
61	10.71.46.60/32	10.71.46.60 – 10.71.46.60	10.71.46.60
62	10.71.46.61/32	10.71.46.61 – 10.71.46.61	10.71.46.61
63	10.71.46.62/32	10.71.46.62 – 10.71.46.62	10.71.46.62
64	10.71.46.63/32	10.71.46.63 – 10.71.46.63	10.71.46.63
65	10.71.46.64/32	10.71.46.64 – 10.71.46.64	10.71.46.64
66	10.71.46.65/32	10.71.46.65 – 10.71.46.65	10.71.46.65
67	10.71.46.66/32	10.71.46.66 – 10.71.46.66	10.71.46.66
68	10.71.46.67/32	10.71.46.67 – 10.71.46.67	10.71.46.67
69	10.71.46.68/32	10.71.46.68 – 10.71.46.68	10.71.46.68
70	10.71.46.69/32	10.71.46.69 – 10.71.46.69	10.71.46.69
71	10.71.46.70/32	10.71.46.70 – 10.71.46.70	10.71.46.70
72	10.71.46.71/32	10.71.46.71 – 10.71.46.71	10.71.46.71
73	10.71.46.72/32	10.71.46.72 – 10.71.46.72	10.71.46.72
74	10.71.46.73/32	10.71.46.73 – 10.71.46.73	10.71.46.73
75	10.71.46.74/32	10.71.46.74 – 10.71.46.74	10.71.46.74
76	10.71.46.75/32	10.71.46.75 – 10.71.46.75	10.71.46.75
77	10.71.46.76/32	10.71.46.76 – 10.71.46.76	10.71.46.76
78	10.71.46.77/32	10.71.46.77 – 10.71.46.77	10.71.46.77
79	10.71.46.78/32	10.71.46.78 – 10.71.46.78	10.71.46.78
80	10.71.46.79/32	10.71.46.79 – 10.71.46.79	10.71.46.79
81	10.71.46.80/32	10.71.46.80 – 10.71.46.80	10.71.46.80
82	10.71.46.81/32	10.71.46.81 – 10.71.46.81	10.71.46.81
83	10.71.46.82/32	10.71.46.82 – 10.71.46.82	10.71.46.82
84	10.71.46.83/32	10.71.46.83 – 10.71.46.83	10.71.46.83
85	10.71.46.84/32	10.71.46.84 – 10.71.46.84	10.71.46.84
86	10.71.46.85/32	10.71.46.85 – 10.71.46.85	10.71.46.85
87	10.71.46.86/32	10.71.46.86 – 10.71.46.86	10.71.46.86
88	10.71.46.87/32	10.71.46.87 – 10.71.46.87	10.71.46.87
89	10.71.46.88/32	10.71.46.88 – 10.71.46.88	10.71.46.88
90	10.71.46.89/32	10.71.46.89 – 10.71.46.89	10.71.46.89
91	10.71.46.90/32	10.71.46.90 – 10.71.46.90	10.71.46.90
92	10.71.46.91/32	10.71.46.91 – 10.71.46.91	10.71.46.91
93	10.71.46.92/32	10.71.46.92 – 10.71.46.92	10.71.46.92
94	10.71.46.93/32	10.71.46.93 – 10.71.46.93	10.71.46.93
95	10.71.46.94/32	10.71.46.94 – 10.71.46.94	10.71.46.94
96	10.71.46.95/32	10.71.46.95 – 10.71.46.95	10.71.46.95
97	10.71.46.96/32	10.71.46.96 – 10.71.46.96	10.71.46.96
98	10.71.46.97/32	10.71.46.97 – 10.71.46.97	10.71.46.97
99	10.71.46.98/32	10.71.46.98 – 10.71.46.98	10.71.46.98
100	10.71.46.99/32	10.71.46.99 – 10.71.46.99	10.71.46.99
101	10.71.46.100/32	10.71.46.100 – 10.71.46.100	10.71.46.100
102	10.71.46.101/32	10.71.46.101 – 10.71.46.101	10.71.46.101
103	10.71.46.102/32	10.71.46.102 – 10.71.46.102	10.71.46.102
104	10.71.46.103/32	10.71.46.103 – 10.71.46.103	10.71.46.103
105	10.71.46.104/32	10.71.46.104 – 10.71.46.104	10.71.46.104
106	10.71.46.105/32	10.71.46.105 – 10.71.46.105	10.71.46.105
107	10.71.46.106/32	10.71.46.106 – 10.71.46.106	10.71.46.106
108	10.71.46.107/32	10.71.46.107 – 10.71.46.107	10.71.46.107
109	10.71.46.108/32	10.71.46.108 – 10.71.46.108	10.71.46.108
110	10.71.46.109/32	10.71.46.109 – 10.71.46.109	10.71.46.109
111	10.71.46.110/32	10.71.46.110 – 10.71.46.110	10.71.46.110
112	10.71.46.111/32	10.71.46.111 – 10.71.46.111	10.71.46.111
113	10.71.46.112/32	10.71.46.112 – 10.71.46.112	10.71.46.112
114	10.71.46.113/32	10.71.46.113 – 10.71.46.113	10.71.46.113
115	10.71.46.114/32	10.71.46.114 – 10.71.46.114	10.71.46.114
116	10.71.46.115/32	10.71.46.115 – 10.71.46.115	10.71.46.115
117	10.71.46.116/32	10.71.46.116 – 10.71.46.116	10.71.46.116
118	10.71.46.117/32	10.71.46.117 – 10.71.46.117	10.71.46.117
119	10.71.46.118/32	10.71.46.118 – 10.71.46.118	10.71.46.118
120	10.71.46.119/32	10.71.46.119 – 10.71.46.119	10.71.46.119
121	10.71.46.120/32	10.71.46.120 – 10.71.46.120	10.71.46.120
122	10.71.46.121/32	10.71.46.121 – 10.71.46.121	10.71.46.121
123	10.71.46.122/32	10.71.46.122 – 10.71.46.122	10.71.46.122
124	10.71.46.123/32	10.71.46.123 – 10.71.46.123	10.71.46.123
125	10.71.46.124/32	10.71.46.124 – 10.71.46.124	10.71.46.124
126	10.71.46.125/32	10.71.46.125 – 10.71.46.125	10.71.46.125
127	10.71.46.126/32	10.71.46.126 – 10.71.46.126	10.71.46.126
128	10.71.46.127/32	10.71.46.127 – 10.71.46.127	10.71.46.127
129	10.71.46.128/32	10.71.46.128 – 10.71.46.128	10.71.46.128
130	10.71.46.129/32	10.71.46.129 – 10.71.46.129	10.71.46.129
131	10.71.46.130/32	10.71.46.130 – 10.71.46.130	10.71.46.130
132	10.71.46.131/32	10.71.46.131 – 10.71.46.131	10.71.46.131
133	10.71.46.132/32	10.71.46.132 – 10.71.46.132	10.71.46.132
134	10.71.46.133/32	10.71.46.133 – 10.71.46.133	10.71.46.133
135	10.71.46.134/32	10.71.46.134 – 10.71.46.134	10.71.46.134
136	10.71.46.135/32	10.71.46.135 – 10.71.46.135	10.71.46.135
137	10.71.46.136/32	10.71.46.136 – 10.71.46.136	10.71.46.136
138	10.71.46.137/32	10.71.46.137 – 10.71.46.137	10.71.46.137
139	10.71.46.138/32	10.71.46.138 – 10.71.46.138	10.71.46.138
140	10.71.46.139/32	10.71.46.139 – 10.71.46.139	10.71.46.139
141	10.71.46.140/32	10.71.46.140 – 10.71.46.140	10.71.46.140
142	10.71.46.141/32	10.71.46.141 – 10.71.46.141	10.71.46.141
143	10.71.46.142/32	10.71.46.142 – 10.71.46.142	10.71.46.142
144	10.71.46.143/32	10.71.46.143 – 10.71.46.143	10.71.46.143
145	10.71.46.144/32	10.71.46.144 – 10.71.46.144	10.71.46.144
146	10.71.46.145/32	10.71.46.145 – 10.71.46.145	10.71.46.145
147	10.71.46.146/32	10.71.46.146 – 10.71.46.146	10.71.46.146
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149	10.71.46.148/32	10.71.46.148 – 10.71.46.148	10.71.46.148
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210	10.71.46.209/32	10.71.46.209 – 10.71.46.209	10.71.46.209
211	10.71.46.210/32	10.71.46.210 – 10.71.46.210	10.71.46.210
212	10.71.46.211/32	10.71.46.211 – 10.71.46.211	10.71.46.211
213	10.71.46.212/32	10.71.46.212 – 10.71.46.212	10.71.46.212
214	10.71.46.213/32	10.71.46.213 – 10.71.46.213	10.71.46.213
215	10.71.46.214/32	10.71.46.214 – 10.71.46.214	10.71.46.214
216	10.71.46.215/32	10.71.46.215 – 10.71.46.215	10.71.46.215
217	10.71.46.216/32	10.71.46.216 – 10.71.46.216	10.71.46.216
218	10.71.46.217/32	10.71.46.217 – 10.71.46.217	10.71.46.217
219	10.71.46.218/32	10.71.46.218 – 10.71.46.218	10.71.46.218
220	10.71.46.219/32	10.71.46.219 – 10.71.46.219	10.71.46.219
221	10.71.46.220/32	10.71.46.220 – 10.71.46.220	10.71.46.220
222	10.71.46.221/32	10.71.46.221 – 10.71.46.221	10.71.46.221
223	10.71.46.222/32	10.71.46.222 – 10.71.46.222	10.71.46.222
224	10.71.46.223/32	10.71.46.223 – 10.71.46.223	10.71.46.223
225	10.71.46.224/32	10.71.46.224 – 10.71.46.224	10.71.46.224
226	10.71.46.225/32	10.71.46.225 – 10.71.46.225	10.71.46.225
227	10.71.46.226/32	10.71.46.226 – 10.71.46.226	10.71.46.226
228	10.71.46.227/32	10.71.46.227 – 10.71.46.227	10.71.46.227
229	10.71.46.228/32	10.71.46.228 – 10.71.46.228	10.71.46.228
230	10.71.46.229/32	10.71.46.229 – 10.71.46.229	10.71.46.229
231	10.71.46.230/32	10.71.46.230 – 10.71.46.230	10.71.46.230
232	10.71.46.231/32	10.71.46.231 – 10.71.46.231	10.71.46.231
233	10.71.46.232/32	10.71.46.232 – 10.71.46.232	10.71.46.232
234	10.71.46.233/32	10.71.46.233 – 10.71.46.233	10.71.46.233
235	10.71.46.234/32	10.71.46.234 – 10.71.46.234	10.71.46.234
236	10.71.46.235/32	10.71.46.235 – 10.71.46.235	10.71.46.235
237	10.71.46.236/32	10.71.46.236 – 10.71.46.236	10.71.46.236
238	10.71.46.237/32	10.71.46.237 – 10.71.46.237	10.71.46.237
239	10.71.46.238/32	10.71.46.238 – 10.71.46.238	10.71.46.238
240	10.71.46.239/32	10.71.46.239 – 10.71.46.239	10.71.46.239
241	10.71.46.240/32	10.71.46.240 – 10.71.46.240	10.71.46.240
242	10.71.46.241/32	10.71.46.241 – 10.71.46.241	10.71.46.241
243	10.71.46.242/32	10.71.46.242 – 10.71.46.242	10.71.46.242
244	10.71.46.243/32	10.71.46.243 – 10.71.46.243	10.71.46.243
245	10.71.46.244/32	10.71.46.244 – 10.71.46.244	10.71.46.244
246	10.71.46.245/32	10.71.46.245 – 10.71.46.245	10.71.46.245
247	10.71.46.246/32	10.71.46.246 – 10.71.46.246	10.71.46.246
248	10.71.46.247/32	10.71.46.247 – 10.71.46.247	10.71.46.247
249	10.71.46.248/32	10.71.46.248 – 10.71.46.248	10.71.46.248
250	10.71.46.249/32	10.71.46.249 – 10.71.46.249	10.71.46.249
251	10.71.46.250/32	10.71.46.250 – 10.71.46.250	10.71.46.250
252	10.71.46.251/32	10.71.46.251 – 10.71.46.251	10.71.46.251
253	10.71.46.252/32	10.71.46.252 – 10.71.46.252	10.71.46.252
254	10.71.46.253/32	10.71.46.253 – 10.71.46.253	10.71.46.253
255	10.71.46.254/32	10.71.46.254 – 10.71.46.254	10.71.46.254
256	10.71.46.255/32	10.71.46.255 – 10.71.46.255	10.71.46.255

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 →