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)10.18.232.0/22

network10.18.232.0/22

broadcast10.18.235.255

first host10.18.232.1

last host10.18.235.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.18.232.0/22

address00001010.00010010.11101000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00010010.11101000.00000000

broadcast00001010.00010010.11101011.11111111

green = network part, grey = host part

hex0x0a12e800

decimal169011200

reverse dns0.232.18.10.in-addr.arpa

ipv4-mapped::ffff:a12:e800

/22 split into /32 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.18.232.0/32	10.18.232.0 – 10.18.232.0	10.18.232.0
2	10.18.232.1/32	10.18.232.1 – 10.18.232.1	10.18.232.1
3	10.18.232.2/32	10.18.232.2 – 10.18.232.2	10.18.232.2
4	10.18.232.3/32	10.18.232.3 – 10.18.232.3	10.18.232.3
5	10.18.232.4/32	10.18.232.4 – 10.18.232.4	10.18.232.4
6	10.18.232.5/32	10.18.232.5 – 10.18.232.5	10.18.232.5
7	10.18.232.6/32	10.18.232.6 – 10.18.232.6	10.18.232.6
8	10.18.232.7/32	10.18.232.7 – 10.18.232.7	10.18.232.7
9	10.18.232.8/32	10.18.232.8 – 10.18.232.8	10.18.232.8
10	10.18.232.9/32	10.18.232.9 – 10.18.232.9	10.18.232.9
11	10.18.232.10/32	10.18.232.10 – 10.18.232.10	10.18.232.10
12	10.18.232.11/32	10.18.232.11 – 10.18.232.11	10.18.232.11
13	10.18.232.12/32	10.18.232.12 – 10.18.232.12	10.18.232.12
14	10.18.232.13/32	10.18.232.13 – 10.18.232.13	10.18.232.13
15	10.18.232.14/32	10.18.232.14 – 10.18.232.14	10.18.232.14
16	10.18.232.15/32	10.18.232.15 – 10.18.232.15	10.18.232.15
17	10.18.232.16/32	10.18.232.16 – 10.18.232.16	10.18.232.16
18	10.18.232.17/32	10.18.232.17 – 10.18.232.17	10.18.232.17
19	10.18.232.18/32	10.18.232.18 – 10.18.232.18	10.18.232.18
20	10.18.232.19/32	10.18.232.19 – 10.18.232.19	10.18.232.19
21	10.18.232.20/32	10.18.232.20 – 10.18.232.20	10.18.232.20
22	10.18.232.21/32	10.18.232.21 – 10.18.232.21	10.18.232.21
23	10.18.232.22/32	10.18.232.22 – 10.18.232.22	10.18.232.22
24	10.18.232.23/32	10.18.232.23 – 10.18.232.23	10.18.232.23
25	10.18.232.24/32	10.18.232.24 – 10.18.232.24	10.18.232.24
26	10.18.232.25/32	10.18.232.25 – 10.18.232.25	10.18.232.25
27	10.18.232.26/32	10.18.232.26 – 10.18.232.26	10.18.232.26
28	10.18.232.27/32	10.18.232.27 – 10.18.232.27	10.18.232.27
29	10.18.232.28/32	10.18.232.28 – 10.18.232.28	10.18.232.28
30	10.18.232.29/32	10.18.232.29 – 10.18.232.29	10.18.232.29
31	10.18.232.30/32	10.18.232.30 – 10.18.232.30	10.18.232.30
32	10.18.232.31/32	10.18.232.31 – 10.18.232.31	10.18.232.31
33	10.18.232.32/32	10.18.232.32 – 10.18.232.32	10.18.232.32
34	10.18.232.33/32	10.18.232.33 – 10.18.232.33	10.18.232.33
35	10.18.232.34/32	10.18.232.34 – 10.18.232.34	10.18.232.34
36	10.18.232.35/32	10.18.232.35 – 10.18.232.35	10.18.232.35
37	10.18.232.36/32	10.18.232.36 – 10.18.232.36	10.18.232.36
38	10.18.232.37/32	10.18.232.37 – 10.18.232.37	10.18.232.37
39	10.18.232.38/32	10.18.232.38 – 10.18.232.38	10.18.232.38
40	10.18.232.39/32	10.18.232.39 – 10.18.232.39	10.18.232.39
41	10.18.232.40/32	10.18.232.40 – 10.18.232.40	10.18.232.40
42	10.18.232.41/32	10.18.232.41 – 10.18.232.41	10.18.232.41
43	10.18.232.42/32	10.18.232.42 – 10.18.232.42	10.18.232.42
44	10.18.232.43/32	10.18.232.43 – 10.18.232.43	10.18.232.43
45	10.18.232.44/32	10.18.232.44 – 10.18.232.44	10.18.232.44
46	10.18.232.45/32	10.18.232.45 – 10.18.232.45	10.18.232.45
47	10.18.232.46/32	10.18.232.46 – 10.18.232.46	10.18.232.46
48	10.18.232.47/32	10.18.232.47 – 10.18.232.47	10.18.232.47
49	10.18.232.48/32	10.18.232.48 – 10.18.232.48	10.18.232.48
50	10.18.232.49/32	10.18.232.49 – 10.18.232.49	10.18.232.49
51	10.18.232.50/32	10.18.232.50 – 10.18.232.50	10.18.232.50
52	10.18.232.51/32	10.18.232.51 – 10.18.232.51	10.18.232.51
53	10.18.232.52/32	10.18.232.52 – 10.18.232.52	10.18.232.52
54	10.18.232.53/32	10.18.232.53 – 10.18.232.53	10.18.232.53
55	10.18.232.54/32	10.18.232.54 – 10.18.232.54	10.18.232.54
56	10.18.232.55/32	10.18.232.55 – 10.18.232.55	10.18.232.55
57	10.18.232.56/32	10.18.232.56 – 10.18.232.56	10.18.232.56
58	10.18.232.57/32	10.18.232.57 – 10.18.232.57	10.18.232.57
59	10.18.232.58/32	10.18.232.58 – 10.18.232.58	10.18.232.58
60	10.18.232.59/32	10.18.232.59 – 10.18.232.59	10.18.232.59
61	10.18.232.60/32	10.18.232.60 – 10.18.232.60	10.18.232.60
62	10.18.232.61/32	10.18.232.61 – 10.18.232.61	10.18.232.61
63	10.18.232.62/32	10.18.232.62 – 10.18.232.62	10.18.232.62
64	10.18.232.63/32	10.18.232.63 – 10.18.232.63	10.18.232.63
65	10.18.232.64/32	10.18.232.64 – 10.18.232.64	10.18.232.64
66	10.18.232.65/32	10.18.232.65 – 10.18.232.65	10.18.232.65
67	10.18.232.66/32	10.18.232.66 – 10.18.232.66	10.18.232.66
68	10.18.232.67/32	10.18.232.67 – 10.18.232.67	10.18.232.67
69	10.18.232.68/32	10.18.232.68 – 10.18.232.68	10.18.232.68
70	10.18.232.69/32	10.18.232.69 – 10.18.232.69	10.18.232.69
71	10.18.232.70/32	10.18.232.70 – 10.18.232.70	10.18.232.70
72	10.18.232.71/32	10.18.232.71 – 10.18.232.71	10.18.232.71
73	10.18.232.72/32	10.18.232.72 – 10.18.232.72	10.18.232.72
74	10.18.232.73/32	10.18.232.73 – 10.18.232.73	10.18.232.73
75	10.18.232.74/32	10.18.232.74 – 10.18.232.74	10.18.232.74
76	10.18.232.75/32	10.18.232.75 – 10.18.232.75	10.18.232.75
77	10.18.232.76/32	10.18.232.76 – 10.18.232.76	10.18.232.76
78	10.18.232.77/32	10.18.232.77 – 10.18.232.77	10.18.232.77
79	10.18.232.78/32	10.18.232.78 – 10.18.232.78	10.18.232.78
80	10.18.232.79/32	10.18.232.79 – 10.18.232.79	10.18.232.79
81	10.18.232.80/32	10.18.232.80 – 10.18.232.80	10.18.232.80
82	10.18.232.81/32	10.18.232.81 – 10.18.232.81	10.18.232.81
83	10.18.232.82/32	10.18.232.82 – 10.18.232.82	10.18.232.82
84	10.18.232.83/32	10.18.232.83 – 10.18.232.83	10.18.232.83
85	10.18.232.84/32	10.18.232.84 – 10.18.232.84	10.18.232.84
86	10.18.232.85/32	10.18.232.85 – 10.18.232.85	10.18.232.85
87	10.18.232.86/32	10.18.232.86 – 10.18.232.86	10.18.232.86
88	10.18.232.87/32	10.18.232.87 – 10.18.232.87	10.18.232.87
89	10.18.232.88/32	10.18.232.88 – 10.18.232.88	10.18.232.88
90	10.18.232.89/32	10.18.232.89 – 10.18.232.89	10.18.232.89
91	10.18.232.90/32	10.18.232.90 – 10.18.232.90	10.18.232.90
92	10.18.232.91/32	10.18.232.91 – 10.18.232.91	10.18.232.91
93	10.18.232.92/32	10.18.232.92 – 10.18.232.92	10.18.232.92
94	10.18.232.93/32	10.18.232.93 – 10.18.232.93	10.18.232.93
95	10.18.232.94/32	10.18.232.94 – 10.18.232.94	10.18.232.94
96	10.18.232.95/32	10.18.232.95 – 10.18.232.95	10.18.232.95
97	10.18.232.96/32	10.18.232.96 – 10.18.232.96	10.18.232.96
98	10.18.232.97/32	10.18.232.97 – 10.18.232.97	10.18.232.97
99	10.18.232.98/32	10.18.232.98 – 10.18.232.98	10.18.232.98
100	10.18.232.99/32	10.18.232.99 – 10.18.232.99	10.18.232.99
101	10.18.232.100/32	10.18.232.100 – 10.18.232.100	10.18.232.100
102	10.18.232.101/32	10.18.232.101 – 10.18.232.101	10.18.232.101
103	10.18.232.102/32	10.18.232.102 – 10.18.232.102	10.18.232.102
104	10.18.232.103/32	10.18.232.103 – 10.18.232.103	10.18.232.103
105	10.18.232.104/32	10.18.232.104 – 10.18.232.104	10.18.232.104
106	10.18.232.105/32	10.18.232.105 – 10.18.232.105	10.18.232.105
107	10.18.232.106/32	10.18.232.106 – 10.18.232.106	10.18.232.106
108	10.18.232.107/32	10.18.232.107 – 10.18.232.107	10.18.232.107
109	10.18.232.108/32	10.18.232.108 – 10.18.232.108	10.18.232.108
110	10.18.232.109/32	10.18.232.109 – 10.18.232.109	10.18.232.109
111	10.18.232.110/32	10.18.232.110 – 10.18.232.110	10.18.232.110
112	10.18.232.111/32	10.18.232.111 – 10.18.232.111	10.18.232.111
113	10.18.232.112/32	10.18.232.112 – 10.18.232.112	10.18.232.112
114	10.18.232.113/32	10.18.232.113 – 10.18.232.113	10.18.232.113
115	10.18.232.114/32	10.18.232.114 – 10.18.232.114	10.18.232.114
116	10.18.232.115/32	10.18.232.115 – 10.18.232.115	10.18.232.115
117	10.18.232.116/32	10.18.232.116 – 10.18.232.116	10.18.232.116
118	10.18.232.117/32	10.18.232.117 – 10.18.232.117	10.18.232.117
119	10.18.232.118/32	10.18.232.118 – 10.18.232.118	10.18.232.118
120	10.18.232.119/32	10.18.232.119 – 10.18.232.119	10.18.232.119
121	10.18.232.120/32	10.18.232.120 – 10.18.232.120	10.18.232.120
122	10.18.232.121/32	10.18.232.121 – 10.18.232.121	10.18.232.121
123	10.18.232.122/32	10.18.232.122 – 10.18.232.122	10.18.232.122
124	10.18.232.123/32	10.18.232.123 – 10.18.232.123	10.18.232.123
125	10.18.232.124/32	10.18.232.124 – 10.18.232.124	10.18.232.124
126	10.18.232.125/32	10.18.232.125 – 10.18.232.125	10.18.232.125
127	10.18.232.126/32	10.18.232.126 – 10.18.232.126	10.18.232.126
128	10.18.232.127/32	10.18.232.127 – 10.18.232.127	10.18.232.127
129	10.18.232.128/32	10.18.232.128 – 10.18.232.128	10.18.232.128
130	10.18.232.129/32	10.18.232.129 – 10.18.232.129	10.18.232.129
131	10.18.232.130/32	10.18.232.130 – 10.18.232.130	10.18.232.130
132	10.18.232.131/32	10.18.232.131 – 10.18.232.131	10.18.232.131
133	10.18.232.132/32	10.18.232.132 – 10.18.232.132	10.18.232.132
134	10.18.232.133/32	10.18.232.133 – 10.18.232.133	10.18.232.133
135	10.18.232.134/32	10.18.232.134 – 10.18.232.134	10.18.232.134
136	10.18.232.135/32	10.18.232.135 – 10.18.232.135	10.18.232.135
137	10.18.232.136/32	10.18.232.136 – 10.18.232.136	10.18.232.136
138	10.18.232.137/32	10.18.232.137 – 10.18.232.137	10.18.232.137
139	10.18.232.138/32	10.18.232.138 – 10.18.232.138	10.18.232.138
140	10.18.232.139/32	10.18.232.139 – 10.18.232.139	10.18.232.139
141	10.18.232.140/32	10.18.232.140 – 10.18.232.140	10.18.232.140
142	10.18.232.141/32	10.18.232.141 – 10.18.232.141	10.18.232.141
143	10.18.232.142/32	10.18.232.142 – 10.18.232.142	10.18.232.142
144	10.18.232.143/32	10.18.232.143 – 10.18.232.143	10.18.232.143
145	10.18.232.144/32	10.18.232.144 – 10.18.232.144	10.18.232.144
146	10.18.232.145/32	10.18.232.145 – 10.18.232.145	10.18.232.145
147	10.18.232.146/32	10.18.232.146 – 10.18.232.146	10.18.232.146
148	10.18.232.147/32	10.18.232.147 – 10.18.232.147	10.18.232.147
149	10.18.232.148/32	10.18.232.148 – 10.18.232.148	10.18.232.148
150	10.18.232.149/32	10.18.232.149 – 10.18.232.149	10.18.232.149
151	10.18.232.150/32	10.18.232.150 – 10.18.232.150	10.18.232.150
152	10.18.232.151/32	10.18.232.151 – 10.18.232.151	10.18.232.151
153	10.18.232.152/32	10.18.232.152 – 10.18.232.152	10.18.232.152
154	10.18.232.153/32	10.18.232.153 – 10.18.232.153	10.18.232.153
155	10.18.232.154/32	10.18.232.154 – 10.18.232.154	10.18.232.154
156	10.18.232.155/32	10.18.232.155 – 10.18.232.155	10.18.232.155
157	10.18.232.156/32	10.18.232.156 – 10.18.232.156	10.18.232.156
158	10.18.232.157/32	10.18.232.157 – 10.18.232.157	10.18.232.157
159	10.18.232.158/32	10.18.232.158 – 10.18.232.158	10.18.232.158
160	10.18.232.159/32	10.18.232.159 – 10.18.232.159	10.18.232.159
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210	10.18.232.209/32	10.18.232.209 – 10.18.232.209	10.18.232.209
211	10.18.232.210/32	10.18.232.210 – 10.18.232.210	10.18.232.210
212	10.18.232.211/32	10.18.232.211 – 10.18.232.211	10.18.232.211
213	10.18.232.212/32	10.18.232.212 – 10.18.232.212	10.18.232.212
214	10.18.232.213/32	10.18.232.213 – 10.18.232.213	10.18.232.213
215	10.18.232.214/32	10.18.232.214 – 10.18.232.214	10.18.232.214
216	10.18.232.215/32	10.18.232.215 – 10.18.232.215	10.18.232.215
217	10.18.232.216/32	10.18.232.216 – 10.18.232.216	10.18.232.216
218	10.18.232.217/32	10.18.232.217 – 10.18.232.217	10.18.232.217
219	10.18.232.218/32	10.18.232.218 – 10.18.232.218	10.18.232.218
220	10.18.232.219/32	10.18.232.219 – 10.18.232.219	10.18.232.219
221	10.18.232.220/32	10.18.232.220 – 10.18.232.220	10.18.232.220
222	10.18.232.221/32	10.18.232.221 – 10.18.232.221	10.18.232.221
223	10.18.232.222/32	10.18.232.222 – 10.18.232.222	10.18.232.222
224	10.18.232.223/32	10.18.232.223 – 10.18.232.223	10.18.232.223
225	10.18.232.224/32	10.18.232.224 – 10.18.232.224	10.18.232.224
226	10.18.232.225/32	10.18.232.225 – 10.18.232.225	10.18.232.225
227	10.18.232.226/32	10.18.232.226 – 10.18.232.226	10.18.232.226
228	10.18.232.227/32	10.18.232.227 – 10.18.232.227	10.18.232.227
229	10.18.232.228/32	10.18.232.228 – 10.18.232.228	10.18.232.228
230	10.18.232.229/32	10.18.232.229 – 10.18.232.229	10.18.232.229
231	10.18.232.230/32	10.18.232.230 – 10.18.232.230	10.18.232.230
232	10.18.232.231/32	10.18.232.231 – 10.18.232.231	10.18.232.231
233	10.18.232.232/32	10.18.232.232 – 10.18.232.232	10.18.232.232
234	10.18.232.233/32	10.18.232.233 – 10.18.232.233	10.18.232.233
235	10.18.232.234/32	10.18.232.234 – 10.18.232.234	10.18.232.234
236	10.18.232.235/32	10.18.232.235 – 10.18.232.235	10.18.232.235
237	10.18.232.236/32	10.18.232.236 – 10.18.232.236	10.18.232.236
238	10.18.232.237/32	10.18.232.237 – 10.18.232.237	10.18.232.237
239	10.18.232.238/32	10.18.232.238 – 10.18.232.238	10.18.232.238
240	10.18.232.239/32	10.18.232.239 – 10.18.232.239	10.18.232.239
241	10.18.232.240/32	10.18.232.240 – 10.18.232.240	10.18.232.240
242	10.18.232.241/32	10.18.232.241 – 10.18.232.241	10.18.232.241
243	10.18.232.242/32	10.18.232.242 – 10.18.232.242	10.18.232.242
244	10.18.232.243/32	10.18.232.243 – 10.18.232.243	10.18.232.243
245	10.18.232.244/32	10.18.232.244 – 10.18.232.244	10.18.232.244
246	10.18.232.245/32	10.18.232.245 – 10.18.232.245	10.18.232.245
247	10.18.232.246/32	10.18.232.246 – 10.18.232.246	10.18.232.246
248	10.18.232.247/32	10.18.232.247 – 10.18.232.247	10.18.232.247
249	10.18.232.248/32	10.18.232.248 – 10.18.232.248	10.18.232.248
250	10.18.232.249/32	10.18.232.249 – 10.18.232.249	10.18.232.249
251	10.18.232.250/32	10.18.232.250 – 10.18.232.250	10.18.232.250
252	10.18.232.251/32	10.18.232.251 – 10.18.232.251	10.18.232.251
253	10.18.232.252/32	10.18.232.252 – 10.18.232.252	10.18.232.252
254	10.18.232.253/32	10.18.232.253 – 10.18.232.253	10.18.232.253
255	10.18.232.254/32	10.18.232.254 – 10.18.232.254	10.18.232.254
256	10.18.232.255/32	10.18.232.255 – 10.18.232.255	10.18.232.255

showing 256 of 1,024

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →