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)10.166.62.0/23

network10.166.62.0/23

broadcast10.166.63.255

first host10.166.62.1

last host10.166.63.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.166.62.0/23

address00001010.10100110.00111110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100110.00111110.00000000

broadcast00001010.10100110.00111111.11111111

green = network part, grey = host part

hex0x0aa63e00

decimal178667008

reverse dns0.62.166.10.in-addr.arpa

ipv4-mapped::ffff:aa6:3e00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.166.62.0/32	10.166.62.0 – 10.166.62.0	10.166.62.0
2	10.166.62.1/32	10.166.62.1 – 10.166.62.1	10.166.62.1
3	10.166.62.2/32	10.166.62.2 – 10.166.62.2	10.166.62.2
4	10.166.62.3/32	10.166.62.3 – 10.166.62.3	10.166.62.3
5	10.166.62.4/32	10.166.62.4 – 10.166.62.4	10.166.62.4
6	10.166.62.5/32	10.166.62.5 – 10.166.62.5	10.166.62.5
7	10.166.62.6/32	10.166.62.6 – 10.166.62.6	10.166.62.6
8	10.166.62.7/32	10.166.62.7 – 10.166.62.7	10.166.62.7
9	10.166.62.8/32	10.166.62.8 – 10.166.62.8	10.166.62.8
10	10.166.62.9/32	10.166.62.9 – 10.166.62.9	10.166.62.9
11	10.166.62.10/32	10.166.62.10 – 10.166.62.10	10.166.62.10
12	10.166.62.11/32	10.166.62.11 – 10.166.62.11	10.166.62.11
13	10.166.62.12/32	10.166.62.12 – 10.166.62.12	10.166.62.12
14	10.166.62.13/32	10.166.62.13 – 10.166.62.13	10.166.62.13
15	10.166.62.14/32	10.166.62.14 – 10.166.62.14	10.166.62.14
16	10.166.62.15/32	10.166.62.15 – 10.166.62.15	10.166.62.15
17	10.166.62.16/32	10.166.62.16 – 10.166.62.16	10.166.62.16
18	10.166.62.17/32	10.166.62.17 – 10.166.62.17	10.166.62.17
19	10.166.62.18/32	10.166.62.18 – 10.166.62.18	10.166.62.18
20	10.166.62.19/32	10.166.62.19 – 10.166.62.19	10.166.62.19
21	10.166.62.20/32	10.166.62.20 – 10.166.62.20	10.166.62.20
22	10.166.62.21/32	10.166.62.21 – 10.166.62.21	10.166.62.21
23	10.166.62.22/32	10.166.62.22 – 10.166.62.22	10.166.62.22
24	10.166.62.23/32	10.166.62.23 – 10.166.62.23	10.166.62.23
25	10.166.62.24/32	10.166.62.24 – 10.166.62.24	10.166.62.24
26	10.166.62.25/32	10.166.62.25 – 10.166.62.25	10.166.62.25
27	10.166.62.26/32	10.166.62.26 – 10.166.62.26	10.166.62.26
28	10.166.62.27/32	10.166.62.27 – 10.166.62.27	10.166.62.27
29	10.166.62.28/32	10.166.62.28 – 10.166.62.28	10.166.62.28
30	10.166.62.29/32	10.166.62.29 – 10.166.62.29	10.166.62.29
31	10.166.62.30/32	10.166.62.30 – 10.166.62.30	10.166.62.30
32	10.166.62.31/32	10.166.62.31 – 10.166.62.31	10.166.62.31
33	10.166.62.32/32	10.166.62.32 – 10.166.62.32	10.166.62.32
34	10.166.62.33/32	10.166.62.33 – 10.166.62.33	10.166.62.33
35	10.166.62.34/32	10.166.62.34 – 10.166.62.34	10.166.62.34
36	10.166.62.35/32	10.166.62.35 – 10.166.62.35	10.166.62.35
37	10.166.62.36/32	10.166.62.36 – 10.166.62.36	10.166.62.36
38	10.166.62.37/32	10.166.62.37 – 10.166.62.37	10.166.62.37
39	10.166.62.38/32	10.166.62.38 – 10.166.62.38	10.166.62.38
40	10.166.62.39/32	10.166.62.39 – 10.166.62.39	10.166.62.39
41	10.166.62.40/32	10.166.62.40 – 10.166.62.40	10.166.62.40
42	10.166.62.41/32	10.166.62.41 – 10.166.62.41	10.166.62.41
43	10.166.62.42/32	10.166.62.42 – 10.166.62.42	10.166.62.42
44	10.166.62.43/32	10.166.62.43 – 10.166.62.43	10.166.62.43
45	10.166.62.44/32	10.166.62.44 – 10.166.62.44	10.166.62.44
46	10.166.62.45/32	10.166.62.45 – 10.166.62.45	10.166.62.45
47	10.166.62.46/32	10.166.62.46 – 10.166.62.46	10.166.62.46
48	10.166.62.47/32	10.166.62.47 – 10.166.62.47	10.166.62.47
49	10.166.62.48/32	10.166.62.48 – 10.166.62.48	10.166.62.48
50	10.166.62.49/32	10.166.62.49 – 10.166.62.49	10.166.62.49
51	10.166.62.50/32	10.166.62.50 – 10.166.62.50	10.166.62.50
52	10.166.62.51/32	10.166.62.51 – 10.166.62.51	10.166.62.51
53	10.166.62.52/32	10.166.62.52 – 10.166.62.52	10.166.62.52
54	10.166.62.53/32	10.166.62.53 – 10.166.62.53	10.166.62.53
55	10.166.62.54/32	10.166.62.54 – 10.166.62.54	10.166.62.54
56	10.166.62.55/32	10.166.62.55 – 10.166.62.55	10.166.62.55
57	10.166.62.56/32	10.166.62.56 – 10.166.62.56	10.166.62.56
58	10.166.62.57/32	10.166.62.57 – 10.166.62.57	10.166.62.57
59	10.166.62.58/32	10.166.62.58 – 10.166.62.58	10.166.62.58
60	10.166.62.59/32	10.166.62.59 – 10.166.62.59	10.166.62.59
61	10.166.62.60/32	10.166.62.60 – 10.166.62.60	10.166.62.60
62	10.166.62.61/32	10.166.62.61 – 10.166.62.61	10.166.62.61
63	10.166.62.62/32	10.166.62.62 – 10.166.62.62	10.166.62.62
64	10.166.62.63/32	10.166.62.63 – 10.166.62.63	10.166.62.63
65	10.166.62.64/32	10.166.62.64 – 10.166.62.64	10.166.62.64
66	10.166.62.65/32	10.166.62.65 – 10.166.62.65	10.166.62.65
67	10.166.62.66/32	10.166.62.66 – 10.166.62.66	10.166.62.66
68	10.166.62.67/32	10.166.62.67 – 10.166.62.67	10.166.62.67
69	10.166.62.68/32	10.166.62.68 – 10.166.62.68	10.166.62.68
70	10.166.62.69/32	10.166.62.69 – 10.166.62.69	10.166.62.69
71	10.166.62.70/32	10.166.62.70 – 10.166.62.70	10.166.62.70
72	10.166.62.71/32	10.166.62.71 – 10.166.62.71	10.166.62.71
73	10.166.62.72/32	10.166.62.72 – 10.166.62.72	10.166.62.72
74	10.166.62.73/32	10.166.62.73 – 10.166.62.73	10.166.62.73
75	10.166.62.74/32	10.166.62.74 – 10.166.62.74	10.166.62.74
76	10.166.62.75/32	10.166.62.75 – 10.166.62.75	10.166.62.75
77	10.166.62.76/32	10.166.62.76 – 10.166.62.76	10.166.62.76
78	10.166.62.77/32	10.166.62.77 – 10.166.62.77	10.166.62.77
79	10.166.62.78/32	10.166.62.78 – 10.166.62.78	10.166.62.78
80	10.166.62.79/32	10.166.62.79 – 10.166.62.79	10.166.62.79
81	10.166.62.80/32	10.166.62.80 – 10.166.62.80	10.166.62.80
82	10.166.62.81/32	10.166.62.81 – 10.166.62.81	10.166.62.81
83	10.166.62.82/32	10.166.62.82 – 10.166.62.82	10.166.62.82
84	10.166.62.83/32	10.166.62.83 – 10.166.62.83	10.166.62.83
85	10.166.62.84/32	10.166.62.84 – 10.166.62.84	10.166.62.84
86	10.166.62.85/32	10.166.62.85 – 10.166.62.85	10.166.62.85
87	10.166.62.86/32	10.166.62.86 – 10.166.62.86	10.166.62.86
88	10.166.62.87/32	10.166.62.87 – 10.166.62.87	10.166.62.87
89	10.166.62.88/32	10.166.62.88 – 10.166.62.88	10.166.62.88
90	10.166.62.89/32	10.166.62.89 – 10.166.62.89	10.166.62.89
91	10.166.62.90/32	10.166.62.90 – 10.166.62.90	10.166.62.90
92	10.166.62.91/32	10.166.62.91 – 10.166.62.91	10.166.62.91
93	10.166.62.92/32	10.166.62.92 – 10.166.62.92	10.166.62.92
94	10.166.62.93/32	10.166.62.93 – 10.166.62.93	10.166.62.93
95	10.166.62.94/32	10.166.62.94 – 10.166.62.94	10.166.62.94
96	10.166.62.95/32	10.166.62.95 – 10.166.62.95	10.166.62.95
97	10.166.62.96/32	10.166.62.96 – 10.166.62.96	10.166.62.96
98	10.166.62.97/32	10.166.62.97 – 10.166.62.97	10.166.62.97
99	10.166.62.98/32	10.166.62.98 – 10.166.62.98	10.166.62.98
100	10.166.62.99/32	10.166.62.99 – 10.166.62.99	10.166.62.99
101	10.166.62.100/32	10.166.62.100 – 10.166.62.100	10.166.62.100
102	10.166.62.101/32	10.166.62.101 – 10.166.62.101	10.166.62.101
103	10.166.62.102/32	10.166.62.102 – 10.166.62.102	10.166.62.102
104	10.166.62.103/32	10.166.62.103 – 10.166.62.103	10.166.62.103
105	10.166.62.104/32	10.166.62.104 – 10.166.62.104	10.166.62.104
106	10.166.62.105/32	10.166.62.105 – 10.166.62.105	10.166.62.105
107	10.166.62.106/32	10.166.62.106 – 10.166.62.106	10.166.62.106
108	10.166.62.107/32	10.166.62.107 – 10.166.62.107	10.166.62.107
109	10.166.62.108/32	10.166.62.108 – 10.166.62.108	10.166.62.108
110	10.166.62.109/32	10.166.62.109 – 10.166.62.109	10.166.62.109
111	10.166.62.110/32	10.166.62.110 – 10.166.62.110	10.166.62.110
112	10.166.62.111/32	10.166.62.111 – 10.166.62.111	10.166.62.111
113	10.166.62.112/32	10.166.62.112 – 10.166.62.112	10.166.62.112
114	10.166.62.113/32	10.166.62.113 – 10.166.62.113	10.166.62.113
115	10.166.62.114/32	10.166.62.114 – 10.166.62.114	10.166.62.114
116	10.166.62.115/32	10.166.62.115 – 10.166.62.115	10.166.62.115
117	10.166.62.116/32	10.166.62.116 – 10.166.62.116	10.166.62.116
118	10.166.62.117/32	10.166.62.117 – 10.166.62.117	10.166.62.117
119	10.166.62.118/32	10.166.62.118 – 10.166.62.118	10.166.62.118
120	10.166.62.119/32	10.166.62.119 – 10.166.62.119	10.166.62.119
121	10.166.62.120/32	10.166.62.120 – 10.166.62.120	10.166.62.120
122	10.166.62.121/32	10.166.62.121 – 10.166.62.121	10.166.62.121
123	10.166.62.122/32	10.166.62.122 – 10.166.62.122	10.166.62.122
124	10.166.62.123/32	10.166.62.123 – 10.166.62.123	10.166.62.123
125	10.166.62.124/32	10.166.62.124 – 10.166.62.124	10.166.62.124
126	10.166.62.125/32	10.166.62.125 – 10.166.62.125	10.166.62.125
127	10.166.62.126/32	10.166.62.126 – 10.166.62.126	10.166.62.126
128	10.166.62.127/32	10.166.62.127 – 10.166.62.127	10.166.62.127
129	10.166.62.128/32	10.166.62.128 – 10.166.62.128	10.166.62.128
130	10.166.62.129/32	10.166.62.129 – 10.166.62.129	10.166.62.129
131	10.166.62.130/32	10.166.62.130 – 10.166.62.130	10.166.62.130
132	10.166.62.131/32	10.166.62.131 – 10.166.62.131	10.166.62.131
133	10.166.62.132/32	10.166.62.132 – 10.166.62.132	10.166.62.132
134	10.166.62.133/32	10.166.62.133 – 10.166.62.133	10.166.62.133
135	10.166.62.134/32	10.166.62.134 – 10.166.62.134	10.166.62.134
136	10.166.62.135/32	10.166.62.135 – 10.166.62.135	10.166.62.135
137	10.166.62.136/32	10.166.62.136 – 10.166.62.136	10.166.62.136
138	10.166.62.137/32	10.166.62.137 – 10.166.62.137	10.166.62.137
139	10.166.62.138/32	10.166.62.138 – 10.166.62.138	10.166.62.138
140	10.166.62.139/32	10.166.62.139 – 10.166.62.139	10.166.62.139
141	10.166.62.140/32	10.166.62.140 – 10.166.62.140	10.166.62.140
142	10.166.62.141/32	10.166.62.141 – 10.166.62.141	10.166.62.141
143	10.166.62.142/32	10.166.62.142 – 10.166.62.142	10.166.62.142
144	10.166.62.143/32	10.166.62.143 – 10.166.62.143	10.166.62.143
145	10.166.62.144/32	10.166.62.144 – 10.166.62.144	10.166.62.144
146	10.166.62.145/32	10.166.62.145 – 10.166.62.145	10.166.62.145
147	10.166.62.146/32	10.166.62.146 – 10.166.62.146	10.166.62.146
148	10.166.62.147/32	10.166.62.147 – 10.166.62.147	10.166.62.147
149	10.166.62.148/32	10.166.62.148 – 10.166.62.148	10.166.62.148
150	10.166.62.149/32	10.166.62.149 – 10.166.62.149	10.166.62.149
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210	10.166.62.209/32	10.166.62.209 – 10.166.62.209	10.166.62.209
211	10.166.62.210/32	10.166.62.210 – 10.166.62.210	10.166.62.210
212	10.166.62.211/32	10.166.62.211 – 10.166.62.211	10.166.62.211
213	10.166.62.212/32	10.166.62.212 – 10.166.62.212	10.166.62.212
214	10.166.62.213/32	10.166.62.213 – 10.166.62.213	10.166.62.213
215	10.166.62.214/32	10.166.62.214 – 10.166.62.214	10.166.62.214
216	10.166.62.215/32	10.166.62.215 – 10.166.62.215	10.166.62.215
217	10.166.62.216/32	10.166.62.216 – 10.166.62.216	10.166.62.216
218	10.166.62.217/32	10.166.62.217 – 10.166.62.217	10.166.62.217
219	10.166.62.218/32	10.166.62.218 – 10.166.62.218	10.166.62.218
220	10.166.62.219/32	10.166.62.219 – 10.166.62.219	10.166.62.219
221	10.166.62.220/32	10.166.62.220 – 10.166.62.220	10.166.62.220
222	10.166.62.221/32	10.166.62.221 – 10.166.62.221	10.166.62.221
223	10.166.62.222/32	10.166.62.222 – 10.166.62.222	10.166.62.222
224	10.166.62.223/32	10.166.62.223 – 10.166.62.223	10.166.62.223
225	10.166.62.224/32	10.166.62.224 – 10.166.62.224	10.166.62.224
226	10.166.62.225/32	10.166.62.225 – 10.166.62.225	10.166.62.225
227	10.166.62.226/32	10.166.62.226 – 10.166.62.226	10.166.62.226
228	10.166.62.227/32	10.166.62.227 – 10.166.62.227	10.166.62.227
229	10.166.62.228/32	10.166.62.228 – 10.166.62.228	10.166.62.228
230	10.166.62.229/32	10.166.62.229 – 10.166.62.229	10.166.62.229
231	10.166.62.230/32	10.166.62.230 – 10.166.62.230	10.166.62.230
232	10.166.62.231/32	10.166.62.231 – 10.166.62.231	10.166.62.231
233	10.166.62.232/32	10.166.62.232 – 10.166.62.232	10.166.62.232
234	10.166.62.233/32	10.166.62.233 – 10.166.62.233	10.166.62.233
235	10.166.62.234/32	10.166.62.234 – 10.166.62.234	10.166.62.234
236	10.166.62.235/32	10.166.62.235 – 10.166.62.235	10.166.62.235
237	10.166.62.236/32	10.166.62.236 – 10.166.62.236	10.166.62.236
238	10.166.62.237/32	10.166.62.237 – 10.166.62.237	10.166.62.237
239	10.166.62.238/32	10.166.62.238 – 10.166.62.238	10.166.62.238
240	10.166.62.239/32	10.166.62.239 – 10.166.62.239	10.166.62.239
241	10.166.62.240/32	10.166.62.240 – 10.166.62.240	10.166.62.240
242	10.166.62.241/32	10.166.62.241 – 10.166.62.241	10.166.62.241
243	10.166.62.242/32	10.166.62.242 – 10.166.62.242	10.166.62.242
244	10.166.62.243/32	10.166.62.243 – 10.166.62.243	10.166.62.243
245	10.166.62.244/32	10.166.62.244 – 10.166.62.244	10.166.62.244
246	10.166.62.245/32	10.166.62.245 – 10.166.62.245	10.166.62.245
247	10.166.62.246/32	10.166.62.246 – 10.166.62.246	10.166.62.246
248	10.166.62.247/32	10.166.62.247 – 10.166.62.247	10.166.62.247
249	10.166.62.248/32	10.166.62.248 – 10.166.62.248	10.166.62.248
250	10.166.62.249/32	10.166.62.249 – 10.166.62.249	10.166.62.249
251	10.166.62.250/32	10.166.62.250 – 10.166.62.250	10.166.62.250
252	10.166.62.251/32	10.166.62.251 – 10.166.62.251	10.166.62.251
253	10.166.62.252/32	10.166.62.252 – 10.166.62.252	10.166.62.252
254	10.166.62.253/32	10.166.62.253 – 10.166.62.253	10.166.62.253
255	10.166.62.254/32	10.166.62.254 – 10.166.62.254	10.166.62.254
256	10.166.62.255/32	10.166.62.255 – 10.166.62.255	10.166.62.255

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 →