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)10.3.90.0/23

network10.3.90.0/23

broadcast10.3.91.255

first host10.3.90.1

last host10.3.91.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.90.0/23

address00001010.00000011.01011010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.01011010.00000000

broadcast00001010.00000011.01011011.11111111

green = network part, grey = host part

hex0x0a035a00

decimal167991808

reverse dns0.90.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:5a00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.3.90.0/32	10.3.90.0 – 10.3.90.0	10.3.90.0
2	10.3.90.1/32	10.3.90.1 – 10.3.90.1	10.3.90.1
3	10.3.90.2/32	10.3.90.2 – 10.3.90.2	10.3.90.2
4	10.3.90.3/32	10.3.90.3 – 10.3.90.3	10.3.90.3
5	10.3.90.4/32	10.3.90.4 – 10.3.90.4	10.3.90.4
6	10.3.90.5/32	10.3.90.5 – 10.3.90.5	10.3.90.5
7	10.3.90.6/32	10.3.90.6 – 10.3.90.6	10.3.90.6
8	10.3.90.7/32	10.3.90.7 – 10.3.90.7	10.3.90.7
9	10.3.90.8/32	10.3.90.8 – 10.3.90.8	10.3.90.8
10	10.3.90.9/32	10.3.90.9 – 10.3.90.9	10.3.90.9
11	10.3.90.10/32	10.3.90.10 – 10.3.90.10	10.3.90.10
12	10.3.90.11/32	10.3.90.11 – 10.3.90.11	10.3.90.11
13	10.3.90.12/32	10.3.90.12 – 10.3.90.12	10.3.90.12
14	10.3.90.13/32	10.3.90.13 – 10.3.90.13	10.3.90.13
15	10.3.90.14/32	10.3.90.14 – 10.3.90.14	10.3.90.14
16	10.3.90.15/32	10.3.90.15 – 10.3.90.15	10.3.90.15
17	10.3.90.16/32	10.3.90.16 – 10.3.90.16	10.3.90.16
18	10.3.90.17/32	10.3.90.17 – 10.3.90.17	10.3.90.17
19	10.3.90.18/32	10.3.90.18 – 10.3.90.18	10.3.90.18
20	10.3.90.19/32	10.3.90.19 – 10.3.90.19	10.3.90.19
21	10.3.90.20/32	10.3.90.20 – 10.3.90.20	10.3.90.20
22	10.3.90.21/32	10.3.90.21 – 10.3.90.21	10.3.90.21
23	10.3.90.22/32	10.3.90.22 – 10.3.90.22	10.3.90.22
24	10.3.90.23/32	10.3.90.23 – 10.3.90.23	10.3.90.23
25	10.3.90.24/32	10.3.90.24 – 10.3.90.24	10.3.90.24
26	10.3.90.25/32	10.3.90.25 – 10.3.90.25	10.3.90.25
27	10.3.90.26/32	10.3.90.26 – 10.3.90.26	10.3.90.26
28	10.3.90.27/32	10.3.90.27 – 10.3.90.27	10.3.90.27
29	10.3.90.28/32	10.3.90.28 – 10.3.90.28	10.3.90.28
30	10.3.90.29/32	10.3.90.29 – 10.3.90.29	10.3.90.29
31	10.3.90.30/32	10.3.90.30 – 10.3.90.30	10.3.90.30
32	10.3.90.31/32	10.3.90.31 – 10.3.90.31	10.3.90.31
33	10.3.90.32/32	10.3.90.32 – 10.3.90.32	10.3.90.32
34	10.3.90.33/32	10.3.90.33 – 10.3.90.33	10.3.90.33
35	10.3.90.34/32	10.3.90.34 – 10.3.90.34	10.3.90.34
36	10.3.90.35/32	10.3.90.35 – 10.3.90.35	10.3.90.35
37	10.3.90.36/32	10.3.90.36 – 10.3.90.36	10.3.90.36
38	10.3.90.37/32	10.3.90.37 – 10.3.90.37	10.3.90.37
39	10.3.90.38/32	10.3.90.38 – 10.3.90.38	10.3.90.38
40	10.3.90.39/32	10.3.90.39 – 10.3.90.39	10.3.90.39
41	10.3.90.40/32	10.3.90.40 – 10.3.90.40	10.3.90.40
42	10.3.90.41/32	10.3.90.41 – 10.3.90.41	10.3.90.41
43	10.3.90.42/32	10.3.90.42 – 10.3.90.42	10.3.90.42
44	10.3.90.43/32	10.3.90.43 – 10.3.90.43	10.3.90.43
45	10.3.90.44/32	10.3.90.44 – 10.3.90.44	10.3.90.44
46	10.3.90.45/32	10.3.90.45 – 10.3.90.45	10.3.90.45
47	10.3.90.46/32	10.3.90.46 – 10.3.90.46	10.3.90.46
48	10.3.90.47/32	10.3.90.47 – 10.3.90.47	10.3.90.47
49	10.3.90.48/32	10.3.90.48 – 10.3.90.48	10.3.90.48
50	10.3.90.49/32	10.3.90.49 – 10.3.90.49	10.3.90.49
51	10.3.90.50/32	10.3.90.50 – 10.3.90.50	10.3.90.50
52	10.3.90.51/32	10.3.90.51 – 10.3.90.51	10.3.90.51
53	10.3.90.52/32	10.3.90.52 – 10.3.90.52	10.3.90.52
54	10.3.90.53/32	10.3.90.53 – 10.3.90.53	10.3.90.53
55	10.3.90.54/32	10.3.90.54 – 10.3.90.54	10.3.90.54
56	10.3.90.55/32	10.3.90.55 – 10.3.90.55	10.3.90.55
57	10.3.90.56/32	10.3.90.56 – 10.3.90.56	10.3.90.56
58	10.3.90.57/32	10.3.90.57 – 10.3.90.57	10.3.90.57
59	10.3.90.58/32	10.3.90.58 – 10.3.90.58	10.3.90.58
60	10.3.90.59/32	10.3.90.59 – 10.3.90.59	10.3.90.59
61	10.3.90.60/32	10.3.90.60 – 10.3.90.60	10.3.90.60
62	10.3.90.61/32	10.3.90.61 – 10.3.90.61	10.3.90.61
63	10.3.90.62/32	10.3.90.62 – 10.3.90.62	10.3.90.62
64	10.3.90.63/32	10.3.90.63 – 10.3.90.63	10.3.90.63
65	10.3.90.64/32	10.3.90.64 – 10.3.90.64	10.3.90.64
66	10.3.90.65/32	10.3.90.65 – 10.3.90.65	10.3.90.65
67	10.3.90.66/32	10.3.90.66 – 10.3.90.66	10.3.90.66
68	10.3.90.67/32	10.3.90.67 – 10.3.90.67	10.3.90.67
69	10.3.90.68/32	10.3.90.68 – 10.3.90.68	10.3.90.68
70	10.3.90.69/32	10.3.90.69 – 10.3.90.69	10.3.90.69
71	10.3.90.70/32	10.3.90.70 – 10.3.90.70	10.3.90.70
72	10.3.90.71/32	10.3.90.71 – 10.3.90.71	10.3.90.71
73	10.3.90.72/32	10.3.90.72 – 10.3.90.72	10.3.90.72
74	10.3.90.73/32	10.3.90.73 – 10.3.90.73	10.3.90.73
75	10.3.90.74/32	10.3.90.74 – 10.3.90.74	10.3.90.74
76	10.3.90.75/32	10.3.90.75 – 10.3.90.75	10.3.90.75
77	10.3.90.76/32	10.3.90.76 – 10.3.90.76	10.3.90.76
78	10.3.90.77/32	10.3.90.77 – 10.3.90.77	10.3.90.77
79	10.3.90.78/32	10.3.90.78 – 10.3.90.78	10.3.90.78
80	10.3.90.79/32	10.3.90.79 – 10.3.90.79	10.3.90.79
81	10.3.90.80/32	10.3.90.80 – 10.3.90.80	10.3.90.80
82	10.3.90.81/32	10.3.90.81 – 10.3.90.81	10.3.90.81
83	10.3.90.82/32	10.3.90.82 – 10.3.90.82	10.3.90.82
84	10.3.90.83/32	10.3.90.83 – 10.3.90.83	10.3.90.83
85	10.3.90.84/32	10.3.90.84 – 10.3.90.84	10.3.90.84
86	10.3.90.85/32	10.3.90.85 – 10.3.90.85	10.3.90.85
87	10.3.90.86/32	10.3.90.86 – 10.3.90.86	10.3.90.86
88	10.3.90.87/32	10.3.90.87 – 10.3.90.87	10.3.90.87
89	10.3.90.88/32	10.3.90.88 – 10.3.90.88	10.3.90.88
90	10.3.90.89/32	10.3.90.89 – 10.3.90.89	10.3.90.89
91	10.3.90.90/32	10.3.90.90 – 10.3.90.90	10.3.90.90
92	10.3.90.91/32	10.3.90.91 – 10.3.90.91	10.3.90.91
93	10.3.90.92/32	10.3.90.92 – 10.3.90.92	10.3.90.92
94	10.3.90.93/32	10.3.90.93 – 10.3.90.93	10.3.90.93
95	10.3.90.94/32	10.3.90.94 – 10.3.90.94	10.3.90.94
96	10.3.90.95/32	10.3.90.95 – 10.3.90.95	10.3.90.95
97	10.3.90.96/32	10.3.90.96 – 10.3.90.96	10.3.90.96
98	10.3.90.97/32	10.3.90.97 – 10.3.90.97	10.3.90.97
99	10.3.90.98/32	10.3.90.98 – 10.3.90.98	10.3.90.98
100	10.3.90.99/32	10.3.90.99 – 10.3.90.99	10.3.90.99
101	10.3.90.100/32	10.3.90.100 – 10.3.90.100	10.3.90.100
102	10.3.90.101/32	10.3.90.101 – 10.3.90.101	10.3.90.101
103	10.3.90.102/32	10.3.90.102 – 10.3.90.102	10.3.90.102
104	10.3.90.103/32	10.3.90.103 – 10.3.90.103	10.3.90.103
105	10.3.90.104/32	10.3.90.104 – 10.3.90.104	10.3.90.104
106	10.3.90.105/32	10.3.90.105 – 10.3.90.105	10.3.90.105
107	10.3.90.106/32	10.3.90.106 – 10.3.90.106	10.3.90.106
108	10.3.90.107/32	10.3.90.107 – 10.3.90.107	10.3.90.107
109	10.3.90.108/32	10.3.90.108 – 10.3.90.108	10.3.90.108
110	10.3.90.109/32	10.3.90.109 – 10.3.90.109	10.3.90.109
111	10.3.90.110/32	10.3.90.110 – 10.3.90.110	10.3.90.110
112	10.3.90.111/32	10.3.90.111 – 10.3.90.111	10.3.90.111
113	10.3.90.112/32	10.3.90.112 – 10.3.90.112	10.3.90.112
114	10.3.90.113/32	10.3.90.113 – 10.3.90.113	10.3.90.113
115	10.3.90.114/32	10.3.90.114 – 10.3.90.114	10.3.90.114
116	10.3.90.115/32	10.3.90.115 – 10.3.90.115	10.3.90.115
117	10.3.90.116/32	10.3.90.116 – 10.3.90.116	10.3.90.116
118	10.3.90.117/32	10.3.90.117 – 10.3.90.117	10.3.90.117
119	10.3.90.118/32	10.3.90.118 – 10.3.90.118	10.3.90.118
120	10.3.90.119/32	10.3.90.119 – 10.3.90.119	10.3.90.119
121	10.3.90.120/32	10.3.90.120 – 10.3.90.120	10.3.90.120
122	10.3.90.121/32	10.3.90.121 – 10.3.90.121	10.3.90.121
123	10.3.90.122/32	10.3.90.122 – 10.3.90.122	10.3.90.122
124	10.3.90.123/32	10.3.90.123 – 10.3.90.123	10.3.90.123
125	10.3.90.124/32	10.3.90.124 – 10.3.90.124	10.3.90.124
126	10.3.90.125/32	10.3.90.125 – 10.3.90.125	10.3.90.125
127	10.3.90.126/32	10.3.90.126 – 10.3.90.126	10.3.90.126
128	10.3.90.127/32	10.3.90.127 – 10.3.90.127	10.3.90.127
129	10.3.90.128/32	10.3.90.128 – 10.3.90.128	10.3.90.128
130	10.3.90.129/32	10.3.90.129 – 10.3.90.129	10.3.90.129
131	10.3.90.130/32	10.3.90.130 – 10.3.90.130	10.3.90.130
132	10.3.90.131/32	10.3.90.131 – 10.3.90.131	10.3.90.131
133	10.3.90.132/32	10.3.90.132 – 10.3.90.132	10.3.90.132
134	10.3.90.133/32	10.3.90.133 – 10.3.90.133	10.3.90.133
135	10.3.90.134/32	10.3.90.134 – 10.3.90.134	10.3.90.134
136	10.3.90.135/32	10.3.90.135 – 10.3.90.135	10.3.90.135
137	10.3.90.136/32	10.3.90.136 – 10.3.90.136	10.3.90.136
138	10.3.90.137/32	10.3.90.137 – 10.3.90.137	10.3.90.137
139	10.3.90.138/32	10.3.90.138 – 10.3.90.138	10.3.90.138
140	10.3.90.139/32	10.3.90.139 – 10.3.90.139	10.3.90.139
141	10.3.90.140/32	10.3.90.140 – 10.3.90.140	10.3.90.140
142	10.3.90.141/32	10.3.90.141 – 10.3.90.141	10.3.90.141
143	10.3.90.142/32	10.3.90.142 – 10.3.90.142	10.3.90.142
144	10.3.90.143/32	10.3.90.143 – 10.3.90.143	10.3.90.143
145	10.3.90.144/32	10.3.90.144 – 10.3.90.144	10.3.90.144
146	10.3.90.145/32	10.3.90.145 – 10.3.90.145	10.3.90.145
147	10.3.90.146/32	10.3.90.146 – 10.3.90.146	10.3.90.146
148	10.3.90.147/32	10.3.90.147 – 10.3.90.147	10.3.90.147
149	10.3.90.148/32	10.3.90.148 – 10.3.90.148	10.3.90.148
150	10.3.90.149/32	10.3.90.149 – 10.3.90.149	10.3.90.149
151	10.3.90.150/32	10.3.90.150 – 10.3.90.150	10.3.90.150
152	10.3.90.151/32	10.3.90.151 – 10.3.90.151	10.3.90.151
153	10.3.90.152/32	10.3.90.152 – 10.3.90.152	10.3.90.152
154	10.3.90.153/32	10.3.90.153 – 10.3.90.153	10.3.90.153
155	10.3.90.154/32	10.3.90.154 – 10.3.90.154	10.3.90.154
156	10.3.90.155/32	10.3.90.155 – 10.3.90.155	10.3.90.155
157	10.3.90.156/32	10.3.90.156 – 10.3.90.156	10.3.90.156
158	10.3.90.157/32	10.3.90.157 – 10.3.90.157	10.3.90.157
159	10.3.90.158/32	10.3.90.158 – 10.3.90.158	10.3.90.158
160	10.3.90.159/32	10.3.90.159 – 10.3.90.159	10.3.90.159
161	10.3.90.160/32	10.3.90.160 – 10.3.90.160	10.3.90.160
162	10.3.90.161/32	10.3.90.161 – 10.3.90.161	10.3.90.161
163	10.3.90.162/32	10.3.90.162 – 10.3.90.162	10.3.90.162
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170	10.3.90.169/32	10.3.90.169 – 10.3.90.169	10.3.90.169
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210	10.3.90.209/32	10.3.90.209 – 10.3.90.209	10.3.90.209
211	10.3.90.210/32	10.3.90.210 – 10.3.90.210	10.3.90.210
212	10.3.90.211/32	10.3.90.211 – 10.3.90.211	10.3.90.211
213	10.3.90.212/32	10.3.90.212 – 10.3.90.212	10.3.90.212
214	10.3.90.213/32	10.3.90.213 – 10.3.90.213	10.3.90.213
215	10.3.90.214/32	10.3.90.214 – 10.3.90.214	10.3.90.214
216	10.3.90.215/32	10.3.90.215 – 10.3.90.215	10.3.90.215
217	10.3.90.216/32	10.3.90.216 – 10.3.90.216	10.3.90.216
218	10.3.90.217/32	10.3.90.217 – 10.3.90.217	10.3.90.217
219	10.3.90.218/32	10.3.90.218 – 10.3.90.218	10.3.90.218
220	10.3.90.219/32	10.3.90.219 – 10.3.90.219	10.3.90.219
221	10.3.90.220/32	10.3.90.220 – 10.3.90.220	10.3.90.220
222	10.3.90.221/32	10.3.90.221 – 10.3.90.221	10.3.90.221
223	10.3.90.222/32	10.3.90.222 – 10.3.90.222	10.3.90.222
224	10.3.90.223/32	10.3.90.223 – 10.3.90.223	10.3.90.223
225	10.3.90.224/32	10.3.90.224 – 10.3.90.224	10.3.90.224
226	10.3.90.225/32	10.3.90.225 – 10.3.90.225	10.3.90.225
227	10.3.90.226/32	10.3.90.226 – 10.3.90.226	10.3.90.226
228	10.3.90.227/32	10.3.90.227 – 10.3.90.227	10.3.90.227
229	10.3.90.228/32	10.3.90.228 – 10.3.90.228	10.3.90.228
230	10.3.90.229/32	10.3.90.229 – 10.3.90.229	10.3.90.229
231	10.3.90.230/32	10.3.90.230 – 10.3.90.230	10.3.90.230
232	10.3.90.231/32	10.3.90.231 – 10.3.90.231	10.3.90.231
233	10.3.90.232/32	10.3.90.232 – 10.3.90.232	10.3.90.232
234	10.3.90.233/32	10.3.90.233 – 10.3.90.233	10.3.90.233
235	10.3.90.234/32	10.3.90.234 – 10.3.90.234	10.3.90.234
236	10.3.90.235/32	10.3.90.235 – 10.3.90.235	10.3.90.235
237	10.3.90.236/32	10.3.90.236 – 10.3.90.236	10.3.90.236
238	10.3.90.237/32	10.3.90.237 – 10.3.90.237	10.3.90.237
239	10.3.90.238/32	10.3.90.238 – 10.3.90.238	10.3.90.238
240	10.3.90.239/32	10.3.90.239 – 10.3.90.239	10.3.90.239
241	10.3.90.240/32	10.3.90.240 – 10.3.90.240	10.3.90.240
242	10.3.90.241/32	10.3.90.241 – 10.3.90.241	10.3.90.241
243	10.3.90.242/32	10.3.90.242 – 10.3.90.242	10.3.90.242
244	10.3.90.243/32	10.3.90.243 – 10.3.90.243	10.3.90.243
245	10.3.90.244/32	10.3.90.244 – 10.3.90.244	10.3.90.244
246	10.3.90.245/32	10.3.90.245 – 10.3.90.245	10.3.90.245
247	10.3.90.246/32	10.3.90.246 – 10.3.90.246	10.3.90.246
248	10.3.90.247/32	10.3.90.247 – 10.3.90.247	10.3.90.247
249	10.3.90.248/32	10.3.90.248 – 10.3.90.248	10.3.90.248
250	10.3.90.249/32	10.3.90.249 – 10.3.90.249	10.3.90.249
251	10.3.90.250/32	10.3.90.250 – 10.3.90.250	10.3.90.250
252	10.3.90.251/32	10.3.90.251 – 10.3.90.251	10.3.90.251
253	10.3.90.252/32	10.3.90.252 – 10.3.90.252	10.3.90.252
254	10.3.90.253/32	10.3.90.253 – 10.3.90.253	10.3.90.253
255	10.3.90.254/32	10.3.90.254 – 10.3.90.254	10.3.90.254
256	10.3.90.255/32	10.3.90.255 – 10.3.90.255	10.3.90.255

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 →