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)10.3.204.0/22

network10.3.204.0/22

broadcast10.3.207.255

first host10.3.204.1

last host10.3.207.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.204.0/22

address00001010.00000011.11001100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.11001100.00000000

broadcast00001010.00000011.11001111.11111111

green = network part, grey = host part

hex0x0a03cc00

decimal168020992

reverse dns0.204.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:cc00

/22 split into /32 · 1,024 subnets

close ×

#	network	host range	broadcast
1	10.3.204.0/32	10.3.204.0 – 10.3.204.0	10.3.204.0
2	10.3.204.1/32	10.3.204.1 – 10.3.204.1	10.3.204.1
3	10.3.204.2/32	10.3.204.2 – 10.3.204.2	10.3.204.2
4	10.3.204.3/32	10.3.204.3 – 10.3.204.3	10.3.204.3
5	10.3.204.4/32	10.3.204.4 – 10.3.204.4	10.3.204.4
6	10.3.204.5/32	10.3.204.5 – 10.3.204.5	10.3.204.5
7	10.3.204.6/32	10.3.204.6 – 10.3.204.6	10.3.204.6
8	10.3.204.7/32	10.3.204.7 – 10.3.204.7	10.3.204.7
9	10.3.204.8/32	10.3.204.8 – 10.3.204.8	10.3.204.8
10	10.3.204.9/32	10.3.204.9 – 10.3.204.9	10.3.204.9
11	10.3.204.10/32	10.3.204.10 – 10.3.204.10	10.3.204.10
12	10.3.204.11/32	10.3.204.11 – 10.3.204.11	10.3.204.11
13	10.3.204.12/32	10.3.204.12 – 10.3.204.12	10.3.204.12
14	10.3.204.13/32	10.3.204.13 – 10.3.204.13	10.3.204.13
15	10.3.204.14/32	10.3.204.14 – 10.3.204.14	10.3.204.14
16	10.3.204.15/32	10.3.204.15 – 10.3.204.15	10.3.204.15
17	10.3.204.16/32	10.3.204.16 – 10.3.204.16	10.3.204.16
18	10.3.204.17/32	10.3.204.17 – 10.3.204.17	10.3.204.17
19	10.3.204.18/32	10.3.204.18 – 10.3.204.18	10.3.204.18
20	10.3.204.19/32	10.3.204.19 – 10.3.204.19	10.3.204.19
21	10.3.204.20/32	10.3.204.20 – 10.3.204.20	10.3.204.20
22	10.3.204.21/32	10.3.204.21 – 10.3.204.21	10.3.204.21
23	10.3.204.22/32	10.3.204.22 – 10.3.204.22	10.3.204.22
24	10.3.204.23/32	10.3.204.23 – 10.3.204.23	10.3.204.23
25	10.3.204.24/32	10.3.204.24 – 10.3.204.24	10.3.204.24
26	10.3.204.25/32	10.3.204.25 – 10.3.204.25	10.3.204.25
27	10.3.204.26/32	10.3.204.26 – 10.3.204.26	10.3.204.26
28	10.3.204.27/32	10.3.204.27 – 10.3.204.27	10.3.204.27
29	10.3.204.28/32	10.3.204.28 – 10.3.204.28	10.3.204.28
30	10.3.204.29/32	10.3.204.29 – 10.3.204.29	10.3.204.29
31	10.3.204.30/32	10.3.204.30 – 10.3.204.30	10.3.204.30
32	10.3.204.31/32	10.3.204.31 – 10.3.204.31	10.3.204.31
33	10.3.204.32/32	10.3.204.32 – 10.3.204.32	10.3.204.32
34	10.3.204.33/32	10.3.204.33 – 10.3.204.33	10.3.204.33
35	10.3.204.34/32	10.3.204.34 – 10.3.204.34	10.3.204.34
36	10.3.204.35/32	10.3.204.35 – 10.3.204.35	10.3.204.35
37	10.3.204.36/32	10.3.204.36 – 10.3.204.36	10.3.204.36
38	10.3.204.37/32	10.3.204.37 – 10.3.204.37	10.3.204.37
39	10.3.204.38/32	10.3.204.38 – 10.3.204.38	10.3.204.38
40	10.3.204.39/32	10.3.204.39 – 10.3.204.39	10.3.204.39
41	10.3.204.40/32	10.3.204.40 – 10.3.204.40	10.3.204.40
42	10.3.204.41/32	10.3.204.41 – 10.3.204.41	10.3.204.41
43	10.3.204.42/32	10.3.204.42 – 10.3.204.42	10.3.204.42
44	10.3.204.43/32	10.3.204.43 – 10.3.204.43	10.3.204.43
45	10.3.204.44/32	10.3.204.44 – 10.3.204.44	10.3.204.44
46	10.3.204.45/32	10.3.204.45 – 10.3.204.45	10.3.204.45
47	10.3.204.46/32	10.3.204.46 – 10.3.204.46	10.3.204.46
48	10.3.204.47/32	10.3.204.47 – 10.3.204.47	10.3.204.47
49	10.3.204.48/32	10.3.204.48 – 10.3.204.48	10.3.204.48
50	10.3.204.49/32	10.3.204.49 – 10.3.204.49	10.3.204.49
51	10.3.204.50/32	10.3.204.50 – 10.3.204.50	10.3.204.50
52	10.3.204.51/32	10.3.204.51 – 10.3.204.51	10.3.204.51
53	10.3.204.52/32	10.3.204.52 – 10.3.204.52	10.3.204.52
54	10.3.204.53/32	10.3.204.53 – 10.3.204.53	10.3.204.53
55	10.3.204.54/32	10.3.204.54 – 10.3.204.54	10.3.204.54
56	10.3.204.55/32	10.3.204.55 – 10.3.204.55	10.3.204.55
57	10.3.204.56/32	10.3.204.56 – 10.3.204.56	10.3.204.56
58	10.3.204.57/32	10.3.204.57 – 10.3.204.57	10.3.204.57
59	10.3.204.58/32	10.3.204.58 – 10.3.204.58	10.3.204.58
60	10.3.204.59/32	10.3.204.59 – 10.3.204.59	10.3.204.59
61	10.3.204.60/32	10.3.204.60 – 10.3.204.60	10.3.204.60
62	10.3.204.61/32	10.3.204.61 – 10.3.204.61	10.3.204.61
63	10.3.204.62/32	10.3.204.62 – 10.3.204.62	10.3.204.62
64	10.3.204.63/32	10.3.204.63 – 10.3.204.63	10.3.204.63
65	10.3.204.64/32	10.3.204.64 – 10.3.204.64	10.3.204.64
66	10.3.204.65/32	10.3.204.65 – 10.3.204.65	10.3.204.65
67	10.3.204.66/32	10.3.204.66 – 10.3.204.66	10.3.204.66
68	10.3.204.67/32	10.3.204.67 – 10.3.204.67	10.3.204.67
69	10.3.204.68/32	10.3.204.68 – 10.3.204.68	10.3.204.68
70	10.3.204.69/32	10.3.204.69 – 10.3.204.69	10.3.204.69
71	10.3.204.70/32	10.3.204.70 – 10.3.204.70	10.3.204.70
72	10.3.204.71/32	10.3.204.71 – 10.3.204.71	10.3.204.71
73	10.3.204.72/32	10.3.204.72 – 10.3.204.72	10.3.204.72
74	10.3.204.73/32	10.3.204.73 – 10.3.204.73	10.3.204.73
75	10.3.204.74/32	10.3.204.74 – 10.3.204.74	10.3.204.74
76	10.3.204.75/32	10.3.204.75 – 10.3.204.75	10.3.204.75
77	10.3.204.76/32	10.3.204.76 – 10.3.204.76	10.3.204.76
78	10.3.204.77/32	10.3.204.77 – 10.3.204.77	10.3.204.77
79	10.3.204.78/32	10.3.204.78 – 10.3.204.78	10.3.204.78
80	10.3.204.79/32	10.3.204.79 – 10.3.204.79	10.3.204.79
81	10.3.204.80/32	10.3.204.80 – 10.3.204.80	10.3.204.80
82	10.3.204.81/32	10.3.204.81 – 10.3.204.81	10.3.204.81
83	10.3.204.82/32	10.3.204.82 – 10.3.204.82	10.3.204.82
84	10.3.204.83/32	10.3.204.83 – 10.3.204.83	10.3.204.83
85	10.3.204.84/32	10.3.204.84 – 10.3.204.84	10.3.204.84
86	10.3.204.85/32	10.3.204.85 – 10.3.204.85	10.3.204.85
87	10.3.204.86/32	10.3.204.86 – 10.3.204.86	10.3.204.86
88	10.3.204.87/32	10.3.204.87 – 10.3.204.87	10.3.204.87
89	10.3.204.88/32	10.3.204.88 – 10.3.204.88	10.3.204.88
90	10.3.204.89/32	10.3.204.89 – 10.3.204.89	10.3.204.89
91	10.3.204.90/32	10.3.204.90 – 10.3.204.90	10.3.204.90
92	10.3.204.91/32	10.3.204.91 – 10.3.204.91	10.3.204.91
93	10.3.204.92/32	10.3.204.92 – 10.3.204.92	10.3.204.92
94	10.3.204.93/32	10.3.204.93 – 10.3.204.93	10.3.204.93
95	10.3.204.94/32	10.3.204.94 – 10.3.204.94	10.3.204.94
96	10.3.204.95/32	10.3.204.95 – 10.3.204.95	10.3.204.95
97	10.3.204.96/32	10.3.204.96 – 10.3.204.96	10.3.204.96
98	10.3.204.97/32	10.3.204.97 – 10.3.204.97	10.3.204.97
99	10.3.204.98/32	10.3.204.98 – 10.3.204.98	10.3.204.98
100	10.3.204.99/32	10.3.204.99 – 10.3.204.99	10.3.204.99
101	10.3.204.100/32	10.3.204.100 – 10.3.204.100	10.3.204.100
102	10.3.204.101/32	10.3.204.101 – 10.3.204.101	10.3.204.101
103	10.3.204.102/32	10.3.204.102 – 10.3.204.102	10.3.204.102
104	10.3.204.103/32	10.3.204.103 – 10.3.204.103	10.3.204.103
105	10.3.204.104/32	10.3.204.104 – 10.3.204.104	10.3.204.104
106	10.3.204.105/32	10.3.204.105 – 10.3.204.105	10.3.204.105
107	10.3.204.106/32	10.3.204.106 – 10.3.204.106	10.3.204.106
108	10.3.204.107/32	10.3.204.107 – 10.3.204.107	10.3.204.107
109	10.3.204.108/32	10.3.204.108 – 10.3.204.108	10.3.204.108
110	10.3.204.109/32	10.3.204.109 – 10.3.204.109	10.3.204.109
111	10.3.204.110/32	10.3.204.110 – 10.3.204.110	10.3.204.110
112	10.3.204.111/32	10.3.204.111 – 10.3.204.111	10.3.204.111
113	10.3.204.112/32	10.3.204.112 – 10.3.204.112	10.3.204.112
114	10.3.204.113/32	10.3.204.113 – 10.3.204.113	10.3.204.113
115	10.3.204.114/32	10.3.204.114 – 10.3.204.114	10.3.204.114
116	10.3.204.115/32	10.3.204.115 – 10.3.204.115	10.3.204.115
117	10.3.204.116/32	10.3.204.116 – 10.3.204.116	10.3.204.116
118	10.3.204.117/32	10.3.204.117 – 10.3.204.117	10.3.204.117
119	10.3.204.118/32	10.3.204.118 – 10.3.204.118	10.3.204.118
120	10.3.204.119/32	10.3.204.119 – 10.3.204.119	10.3.204.119
121	10.3.204.120/32	10.3.204.120 – 10.3.204.120	10.3.204.120
122	10.3.204.121/32	10.3.204.121 – 10.3.204.121	10.3.204.121
123	10.3.204.122/32	10.3.204.122 – 10.3.204.122	10.3.204.122
124	10.3.204.123/32	10.3.204.123 – 10.3.204.123	10.3.204.123
125	10.3.204.124/32	10.3.204.124 – 10.3.204.124	10.3.204.124
126	10.3.204.125/32	10.3.204.125 – 10.3.204.125	10.3.204.125
127	10.3.204.126/32	10.3.204.126 – 10.3.204.126	10.3.204.126
128	10.3.204.127/32	10.3.204.127 – 10.3.204.127	10.3.204.127
129	10.3.204.128/32	10.3.204.128 – 10.3.204.128	10.3.204.128
130	10.3.204.129/32	10.3.204.129 – 10.3.204.129	10.3.204.129
131	10.3.204.130/32	10.3.204.130 – 10.3.204.130	10.3.204.130
132	10.3.204.131/32	10.3.204.131 – 10.3.204.131	10.3.204.131
133	10.3.204.132/32	10.3.204.132 – 10.3.204.132	10.3.204.132
134	10.3.204.133/32	10.3.204.133 – 10.3.204.133	10.3.204.133
135	10.3.204.134/32	10.3.204.134 – 10.3.204.134	10.3.204.134
136	10.3.204.135/32	10.3.204.135 – 10.3.204.135	10.3.204.135
137	10.3.204.136/32	10.3.204.136 – 10.3.204.136	10.3.204.136
138	10.3.204.137/32	10.3.204.137 – 10.3.204.137	10.3.204.137
139	10.3.204.138/32	10.3.204.138 – 10.3.204.138	10.3.204.138
140	10.3.204.139/32	10.3.204.139 – 10.3.204.139	10.3.204.139
141	10.3.204.140/32	10.3.204.140 – 10.3.204.140	10.3.204.140
142	10.3.204.141/32	10.3.204.141 – 10.3.204.141	10.3.204.141
143	10.3.204.142/32	10.3.204.142 – 10.3.204.142	10.3.204.142
144	10.3.204.143/32	10.3.204.143 – 10.3.204.143	10.3.204.143
145	10.3.204.144/32	10.3.204.144 – 10.3.204.144	10.3.204.144
146	10.3.204.145/32	10.3.204.145 – 10.3.204.145	10.3.204.145
147	10.3.204.146/32	10.3.204.146 – 10.3.204.146	10.3.204.146
148	10.3.204.147/32	10.3.204.147 – 10.3.204.147	10.3.204.147
149	10.3.204.148/32	10.3.204.148 – 10.3.204.148	10.3.204.148
150	10.3.204.149/32	10.3.204.149 – 10.3.204.149	10.3.204.149
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152	10.3.204.151/32	10.3.204.151 – 10.3.204.151	10.3.204.151
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156	10.3.204.155/32	10.3.204.155 – 10.3.204.155	10.3.204.155
157	10.3.204.156/32	10.3.204.156 – 10.3.204.156	10.3.204.156
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159	10.3.204.158/32	10.3.204.158 – 10.3.204.158	10.3.204.158
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210	10.3.204.209/32	10.3.204.209 – 10.3.204.209	10.3.204.209
211	10.3.204.210/32	10.3.204.210 – 10.3.204.210	10.3.204.210
212	10.3.204.211/32	10.3.204.211 – 10.3.204.211	10.3.204.211
213	10.3.204.212/32	10.3.204.212 – 10.3.204.212	10.3.204.212
214	10.3.204.213/32	10.3.204.213 – 10.3.204.213	10.3.204.213
215	10.3.204.214/32	10.3.204.214 – 10.3.204.214	10.3.204.214
216	10.3.204.215/32	10.3.204.215 – 10.3.204.215	10.3.204.215
217	10.3.204.216/32	10.3.204.216 – 10.3.204.216	10.3.204.216
218	10.3.204.217/32	10.3.204.217 – 10.3.204.217	10.3.204.217
219	10.3.204.218/32	10.3.204.218 – 10.3.204.218	10.3.204.218
220	10.3.204.219/32	10.3.204.219 – 10.3.204.219	10.3.204.219
221	10.3.204.220/32	10.3.204.220 – 10.3.204.220	10.3.204.220
222	10.3.204.221/32	10.3.204.221 – 10.3.204.221	10.3.204.221
223	10.3.204.222/32	10.3.204.222 – 10.3.204.222	10.3.204.222
224	10.3.204.223/32	10.3.204.223 – 10.3.204.223	10.3.204.223
225	10.3.204.224/32	10.3.204.224 – 10.3.204.224	10.3.204.224
226	10.3.204.225/32	10.3.204.225 – 10.3.204.225	10.3.204.225
227	10.3.204.226/32	10.3.204.226 – 10.3.204.226	10.3.204.226
228	10.3.204.227/32	10.3.204.227 – 10.3.204.227	10.3.204.227
229	10.3.204.228/32	10.3.204.228 – 10.3.204.228	10.3.204.228
230	10.3.204.229/32	10.3.204.229 – 10.3.204.229	10.3.204.229
231	10.3.204.230/32	10.3.204.230 – 10.3.204.230	10.3.204.230
232	10.3.204.231/32	10.3.204.231 – 10.3.204.231	10.3.204.231
233	10.3.204.232/32	10.3.204.232 – 10.3.204.232	10.3.204.232
234	10.3.204.233/32	10.3.204.233 – 10.3.204.233	10.3.204.233
235	10.3.204.234/32	10.3.204.234 – 10.3.204.234	10.3.204.234
236	10.3.204.235/32	10.3.204.235 – 10.3.204.235	10.3.204.235
237	10.3.204.236/32	10.3.204.236 – 10.3.204.236	10.3.204.236
238	10.3.204.237/32	10.3.204.237 – 10.3.204.237	10.3.204.237
239	10.3.204.238/32	10.3.204.238 – 10.3.204.238	10.3.204.238
240	10.3.204.239/32	10.3.204.239 – 10.3.204.239	10.3.204.239
241	10.3.204.240/32	10.3.204.240 – 10.3.204.240	10.3.204.240
242	10.3.204.241/32	10.3.204.241 – 10.3.204.241	10.3.204.241
243	10.3.204.242/32	10.3.204.242 – 10.3.204.242	10.3.204.242
244	10.3.204.243/32	10.3.204.243 – 10.3.204.243	10.3.204.243
245	10.3.204.244/32	10.3.204.244 – 10.3.204.244	10.3.204.244
246	10.3.204.245/32	10.3.204.245 – 10.3.204.245	10.3.204.245
247	10.3.204.246/32	10.3.204.246 – 10.3.204.246	10.3.204.246
248	10.3.204.247/32	10.3.204.247 – 10.3.204.247	10.3.204.247
249	10.3.204.248/32	10.3.204.248 – 10.3.204.248	10.3.204.248
250	10.3.204.249/32	10.3.204.249 – 10.3.204.249	10.3.204.249
251	10.3.204.250/32	10.3.204.250 – 10.3.204.250	10.3.204.250
252	10.3.204.251/32	10.3.204.251 – 10.3.204.251	10.3.204.251
253	10.3.204.252/32	10.3.204.252 – 10.3.204.252	10.3.204.252
254	10.3.204.253/32	10.3.204.253 – 10.3.204.253	10.3.204.253
255	10.3.204.254/32	10.3.204.254 – 10.3.204.254	10.3.204.254
256	10.3.204.255/32	10.3.204.255 – 10.3.204.255	10.3.204.255

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 →