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)10.3.246.0/23

network10.3.246.0/23

broadcast10.3.247.255

first host10.3.246.1

last host10.3.247.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.246.0/23

address00001010.00000011.11110110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.11110110.00000000

broadcast00001010.00000011.11110111.11111111

green = network part, grey = host part

hex0x0a03f600

decimal168031744

reverse dns0.246.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:f600

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.3.246.0/32	10.3.246.0 – 10.3.246.0	10.3.246.0
2	10.3.246.1/32	10.3.246.1 – 10.3.246.1	10.3.246.1
3	10.3.246.2/32	10.3.246.2 – 10.3.246.2	10.3.246.2
4	10.3.246.3/32	10.3.246.3 – 10.3.246.3	10.3.246.3
5	10.3.246.4/32	10.3.246.4 – 10.3.246.4	10.3.246.4
6	10.3.246.5/32	10.3.246.5 – 10.3.246.5	10.3.246.5
7	10.3.246.6/32	10.3.246.6 – 10.3.246.6	10.3.246.6
8	10.3.246.7/32	10.3.246.7 – 10.3.246.7	10.3.246.7
9	10.3.246.8/32	10.3.246.8 – 10.3.246.8	10.3.246.8
10	10.3.246.9/32	10.3.246.9 – 10.3.246.9	10.3.246.9
11	10.3.246.10/32	10.3.246.10 – 10.3.246.10	10.3.246.10
12	10.3.246.11/32	10.3.246.11 – 10.3.246.11	10.3.246.11
13	10.3.246.12/32	10.3.246.12 – 10.3.246.12	10.3.246.12
14	10.3.246.13/32	10.3.246.13 – 10.3.246.13	10.3.246.13
15	10.3.246.14/32	10.3.246.14 – 10.3.246.14	10.3.246.14
16	10.3.246.15/32	10.3.246.15 – 10.3.246.15	10.3.246.15
17	10.3.246.16/32	10.3.246.16 – 10.3.246.16	10.3.246.16
18	10.3.246.17/32	10.3.246.17 – 10.3.246.17	10.3.246.17
19	10.3.246.18/32	10.3.246.18 – 10.3.246.18	10.3.246.18
20	10.3.246.19/32	10.3.246.19 – 10.3.246.19	10.3.246.19
21	10.3.246.20/32	10.3.246.20 – 10.3.246.20	10.3.246.20
22	10.3.246.21/32	10.3.246.21 – 10.3.246.21	10.3.246.21
23	10.3.246.22/32	10.3.246.22 – 10.3.246.22	10.3.246.22
24	10.3.246.23/32	10.3.246.23 – 10.3.246.23	10.3.246.23
25	10.3.246.24/32	10.3.246.24 – 10.3.246.24	10.3.246.24
26	10.3.246.25/32	10.3.246.25 – 10.3.246.25	10.3.246.25
27	10.3.246.26/32	10.3.246.26 – 10.3.246.26	10.3.246.26
28	10.3.246.27/32	10.3.246.27 – 10.3.246.27	10.3.246.27
29	10.3.246.28/32	10.3.246.28 – 10.3.246.28	10.3.246.28
30	10.3.246.29/32	10.3.246.29 – 10.3.246.29	10.3.246.29
31	10.3.246.30/32	10.3.246.30 – 10.3.246.30	10.3.246.30
32	10.3.246.31/32	10.3.246.31 – 10.3.246.31	10.3.246.31
33	10.3.246.32/32	10.3.246.32 – 10.3.246.32	10.3.246.32
34	10.3.246.33/32	10.3.246.33 – 10.3.246.33	10.3.246.33
35	10.3.246.34/32	10.3.246.34 – 10.3.246.34	10.3.246.34
36	10.3.246.35/32	10.3.246.35 – 10.3.246.35	10.3.246.35
37	10.3.246.36/32	10.3.246.36 – 10.3.246.36	10.3.246.36
38	10.3.246.37/32	10.3.246.37 – 10.3.246.37	10.3.246.37
39	10.3.246.38/32	10.3.246.38 – 10.3.246.38	10.3.246.38
40	10.3.246.39/32	10.3.246.39 – 10.3.246.39	10.3.246.39
41	10.3.246.40/32	10.3.246.40 – 10.3.246.40	10.3.246.40
42	10.3.246.41/32	10.3.246.41 – 10.3.246.41	10.3.246.41
43	10.3.246.42/32	10.3.246.42 – 10.3.246.42	10.3.246.42
44	10.3.246.43/32	10.3.246.43 – 10.3.246.43	10.3.246.43
45	10.3.246.44/32	10.3.246.44 – 10.3.246.44	10.3.246.44
46	10.3.246.45/32	10.3.246.45 – 10.3.246.45	10.3.246.45
47	10.3.246.46/32	10.3.246.46 – 10.3.246.46	10.3.246.46
48	10.3.246.47/32	10.3.246.47 – 10.3.246.47	10.3.246.47
49	10.3.246.48/32	10.3.246.48 – 10.3.246.48	10.3.246.48
50	10.3.246.49/32	10.3.246.49 – 10.3.246.49	10.3.246.49
51	10.3.246.50/32	10.3.246.50 – 10.3.246.50	10.3.246.50
52	10.3.246.51/32	10.3.246.51 – 10.3.246.51	10.3.246.51
53	10.3.246.52/32	10.3.246.52 – 10.3.246.52	10.3.246.52
54	10.3.246.53/32	10.3.246.53 – 10.3.246.53	10.3.246.53
55	10.3.246.54/32	10.3.246.54 – 10.3.246.54	10.3.246.54
56	10.3.246.55/32	10.3.246.55 – 10.3.246.55	10.3.246.55
57	10.3.246.56/32	10.3.246.56 – 10.3.246.56	10.3.246.56
58	10.3.246.57/32	10.3.246.57 – 10.3.246.57	10.3.246.57
59	10.3.246.58/32	10.3.246.58 – 10.3.246.58	10.3.246.58
60	10.3.246.59/32	10.3.246.59 – 10.3.246.59	10.3.246.59
61	10.3.246.60/32	10.3.246.60 – 10.3.246.60	10.3.246.60
62	10.3.246.61/32	10.3.246.61 – 10.3.246.61	10.3.246.61
63	10.3.246.62/32	10.3.246.62 – 10.3.246.62	10.3.246.62
64	10.3.246.63/32	10.3.246.63 – 10.3.246.63	10.3.246.63
65	10.3.246.64/32	10.3.246.64 – 10.3.246.64	10.3.246.64
66	10.3.246.65/32	10.3.246.65 – 10.3.246.65	10.3.246.65
67	10.3.246.66/32	10.3.246.66 – 10.3.246.66	10.3.246.66
68	10.3.246.67/32	10.3.246.67 – 10.3.246.67	10.3.246.67
69	10.3.246.68/32	10.3.246.68 – 10.3.246.68	10.3.246.68
70	10.3.246.69/32	10.3.246.69 – 10.3.246.69	10.3.246.69
71	10.3.246.70/32	10.3.246.70 – 10.3.246.70	10.3.246.70
72	10.3.246.71/32	10.3.246.71 – 10.3.246.71	10.3.246.71
73	10.3.246.72/32	10.3.246.72 – 10.3.246.72	10.3.246.72
74	10.3.246.73/32	10.3.246.73 – 10.3.246.73	10.3.246.73
75	10.3.246.74/32	10.3.246.74 – 10.3.246.74	10.3.246.74
76	10.3.246.75/32	10.3.246.75 – 10.3.246.75	10.3.246.75
77	10.3.246.76/32	10.3.246.76 – 10.3.246.76	10.3.246.76
78	10.3.246.77/32	10.3.246.77 – 10.3.246.77	10.3.246.77
79	10.3.246.78/32	10.3.246.78 – 10.3.246.78	10.3.246.78
80	10.3.246.79/32	10.3.246.79 – 10.3.246.79	10.3.246.79
81	10.3.246.80/32	10.3.246.80 – 10.3.246.80	10.3.246.80
82	10.3.246.81/32	10.3.246.81 – 10.3.246.81	10.3.246.81
83	10.3.246.82/32	10.3.246.82 – 10.3.246.82	10.3.246.82
84	10.3.246.83/32	10.3.246.83 – 10.3.246.83	10.3.246.83
85	10.3.246.84/32	10.3.246.84 – 10.3.246.84	10.3.246.84
86	10.3.246.85/32	10.3.246.85 – 10.3.246.85	10.3.246.85
87	10.3.246.86/32	10.3.246.86 – 10.3.246.86	10.3.246.86
88	10.3.246.87/32	10.3.246.87 – 10.3.246.87	10.3.246.87
89	10.3.246.88/32	10.3.246.88 – 10.3.246.88	10.3.246.88
90	10.3.246.89/32	10.3.246.89 – 10.3.246.89	10.3.246.89
91	10.3.246.90/32	10.3.246.90 – 10.3.246.90	10.3.246.90
92	10.3.246.91/32	10.3.246.91 – 10.3.246.91	10.3.246.91
93	10.3.246.92/32	10.3.246.92 – 10.3.246.92	10.3.246.92
94	10.3.246.93/32	10.3.246.93 – 10.3.246.93	10.3.246.93
95	10.3.246.94/32	10.3.246.94 – 10.3.246.94	10.3.246.94
96	10.3.246.95/32	10.3.246.95 – 10.3.246.95	10.3.246.95
97	10.3.246.96/32	10.3.246.96 – 10.3.246.96	10.3.246.96
98	10.3.246.97/32	10.3.246.97 – 10.3.246.97	10.3.246.97
99	10.3.246.98/32	10.3.246.98 – 10.3.246.98	10.3.246.98
100	10.3.246.99/32	10.3.246.99 – 10.3.246.99	10.3.246.99
101	10.3.246.100/32	10.3.246.100 – 10.3.246.100	10.3.246.100
102	10.3.246.101/32	10.3.246.101 – 10.3.246.101	10.3.246.101
103	10.3.246.102/32	10.3.246.102 – 10.3.246.102	10.3.246.102
104	10.3.246.103/32	10.3.246.103 – 10.3.246.103	10.3.246.103
105	10.3.246.104/32	10.3.246.104 – 10.3.246.104	10.3.246.104
106	10.3.246.105/32	10.3.246.105 – 10.3.246.105	10.3.246.105
107	10.3.246.106/32	10.3.246.106 – 10.3.246.106	10.3.246.106
108	10.3.246.107/32	10.3.246.107 – 10.3.246.107	10.3.246.107
109	10.3.246.108/32	10.3.246.108 – 10.3.246.108	10.3.246.108
110	10.3.246.109/32	10.3.246.109 – 10.3.246.109	10.3.246.109
111	10.3.246.110/32	10.3.246.110 – 10.3.246.110	10.3.246.110
112	10.3.246.111/32	10.3.246.111 – 10.3.246.111	10.3.246.111
113	10.3.246.112/32	10.3.246.112 – 10.3.246.112	10.3.246.112
114	10.3.246.113/32	10.3.246.113 – 10.3.246.113	10.3.246.113
115	10.3.246.114/32	10.3.246.114 – 10.3.246.114	10.3.246.114
116	10.3.246.115/32	10.3.246.115 – 10.3.246.115	10.3.246.115
117	10.3.246.116/32	10.3.246.116 – 10.3.246.116	10.3.246.116
118	10.3.246.117/32	10.3.246.117 – 10.3.246.117	10.3.246.117
119	10.3.246.118/32	10.3.246.118 – 10.3.246.118	10.3.246.118
120	10.3.246.119/32	10.3.246.119 – 10.3.246.119	10.3.246.119
121	10.3.246.120/32	10.3.246.120 – 10.3.246.120	10.3.246.120
122	10.3.246.121/32	10.3.246.121 – 10.3.246.121	10.3.246.121
123	10.3.246.122/32	10.3.246.122 – 10.3.246.122	10.3.246.122
124	10.3.246.123/32	10.3.246.123 – 10.3.246.123	10.3.246.123
125	10.3.246.124/32	10.3.246.124 – 10.3.246.124	10.3.246.124
126	10.3.246.125/32	10.3.246.125 – 10.3.246.125	10.3.246.125
127	10.3.246.126/32	10.3.246.126 – 10.3.246.126	10.3.246.126
128	10.3.246.127/32	10.3.246.127 – 10.3.246.127	10.3.246.127
129	10.3.246.128/32	10.3.246.128 – 10.3.246.128	10.3.246.128
130	10.3.246.129/32	10.3.246.129 – 10.3.246.129	10.3.246.129
131	10.3.246.130/32	10.3.246.130 – 10.3.246.130	10.3.246.130
132	10.3.246.131/32	10.3.246.131 – 10.3.246.131	10.3.246.131
133	10.3.246.132/32	10.3.246.132 – 10.3.246.132	10.3.246.132
134	10.3.246.133/32	10.3.246.133 – 10.3.246.133	10.3.246.133
135	10.3.246.134/32	10.3.246.134 – 10.3.246.134	10.3.246.134
136	10.3.246.135/32	10.3.246.135 – 10.3.246.135	10.3.246.135
137	10.3.246.136/32	10.3.246.136 – 10.3.246.136	10.3.246.136
138	10.3.246.137/32	10.3.246.137 – 10.3.246.137	10.3.246.137
139	10.3.246.138/32	10.3.246.138 – 10.3.246.138	10.3.246.138
140	10.3.246.139/32	10.3.246.139 – 10.3.246.139	10.3.246.139
141	10.3.246.140/32	10.3.246.140 – 10.3.246.140	10.3.246.140
142	10.3.246.141/32	10.3.246.141 – 10.3.246.141	10.3.246.141
143	10.3.246.142/32	10.3.246.142 – 10.3.246.142	10.3.246.142
144	10.3.246.143/32	10.3.246.143 – 10.3.246.143	10.3.246.143
145	10.3.246.144/32	10.3.246.144 – 10.3.246.144	10.3.246.144
146	10.3.246.145/32	10.3.246.145 – 10.3.246.145	10.3.246.145
147	10.3.246.146/32	10.3.246.146 – 10.3.246.146	10.3.246.146
148	10.3.246.147/32	10.3.246.147 – 10.3.246.147	10.3.246.147
149	10.3.246.148/32	10.3.246.148 – 10.3.246.148	10.3.246.148
150	10.3.246.149/32	10.3.246.149 – 10.3.246.149	10.3.246.149
151	10.3.246.150/32	10.3.246.150 – 10.3.246.150	10.3.246.150
152	10.3.246.151/32	10.3.246.151 – 10.3.246.151	10.3.246.151
153	10.3.246.152/32	10.3.246.152 – 10.3.246.152	10.3.246.152
154	10.3.246.153/32	10.3.246.153 – 10.3.246.153	10.3.246.153
155	10.3.246.154/32	10.3.246.154 – 10.3.246.154	10.3.246.154
156	10.3.246.155/32	10.3.246.155 – 10.3.246.155	10.3.246.155
157	10.3.246.156/32	10.3.246.156 – 10.3.246.156	10.3.246.156
158	10.3.246.157/32	10.3.246.157 – 10.3.246.157	10.3.246.157
159	10.3.246.158/32	10.3.246.158 – 10.3.246.158	10.3.246.158
160	10.3.246.159/32	10.3.246.159 – 10.3.246.159	10.3.246.159
161	10.3.246.160/32	10.3.246.160 – 10.3.246.160	10.3.246.160
162	10.3.246.161/32	10.3.246.161 – 10.3.246.161	10.3.246.161
163	10.3.246.162/32	10.3.246.162 – 10.3.246.162	10.3.246.162
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210	10.3.246.209/32	10.3.246.209 – 10.3.246.209	10.3.246.209
211	10.3.246.210/32	10.3.246.210 – 10.3.246.210	10.3.246.210
212	10.3.246.211/32	10.3.246.211 – 10.3.246.211	10.3.246.211
213	10.3.246.212/32	10.3.246.212 – 10.3.246.212	10.3.246.212
214	10.3.246.213/32	10.3.246.213 – 10.3.246.213	10.3.246.213
215	10.3.246.214/32	10.3.246.214 – 10.3.246.214	10.3.246.214
216	10.3.246.215/32	10.3.246.215 – 10.3.246.215	10.3.246.215
217	10.3.246.216/32	10.3.246.216 – 10.3.246.216	10.3.246.216
218	10.3.246.217/32	10.3.246.217 – 10.3.246.217	10.3.246.217
219	10.3.246.218/32	10.3.246.218 – 10.3.246.218	10.3.246.218
220	10.3.246.219/32	10.3.246.219 – 10.3.246.219	10.3.246.219
221	10.3.246.220/32	10.3.246.220 – 10.3.246.220	10.3.246.220
222	10.3.246.221/32	10.3.246.221 – 10.3.246.221	10.3.246.221
223	10.3.246.222/32	10.3.246.222 – 10.3.246.222	10.3.246.222
224	10.3.246.223/32	10.3.246.223 – 10.3.246.223	10.3.246.223
225	10.3.246.224/32	10.3.246.224 – 10.3.246.224	10.3.246.224
226	10.3.246.225/32	10.3.246.225 – 10.3.246.225	10.3.246.225
227	10.3.246.226/32	10.3.246.226 – 10.3.246.226	10.3.246.226
228	10.3.246.227/32	10.3.246.227 – 10.3.246.227	10.3.246.227
229	10.3.246.228/32	10.3.246.228 – 10.3.246.228	10.3.246.228
230	10.3.246.229/32	10.3.246.229 – 10.3.246.229	10.3.246.229
231	10.3.246.230/32	10.3.246.230 – 10.3.246.230	10.3.246.230
232	10.3.246.231/32	10.3.246.231 – 10.3.246.231	10.3.246.231
233	10.3.246.232/32	10.3.246.232 – 10.3.246.232	10.3.246.232
234	10.3.246.233/32	10.3.246.233 – 10.3.246.233	10.3.246.233
235	10.3.246.234/32	10.3.246.234 – 10.3.246.234	10.3.246.234
236	10.3.246.235/32	10.3.246.235 – 10.3.246.235	10.3.246.235
237	10.3.246.236/32	10.3.246.236 – 10.3.246.236	10.3.246.236
238	10.3.246.237/32	10.3.246.237 – 10.3.246.237	10.3.246.237
239	10.3.246.238/32	10.3.246.238 – 10.3.246.238	10.3.246.238
240	10.3.246.239/32	10.3.246.239 – 10.3.246.239	10.3.246.239
241	10.3.246.240/32	10.3.246.240 – 10.3.246.240	10.3.246.240
242	10.3.246.241/32	10.3.246.241 – 10.3.246.241	10.3.246.241
243	10.3.246.242/32	10.3.246.242 – 10.3.246.242	10.3.246.242
244	10.3.246.243/32	10.3.246.243 – 10.3.246.243	10.3.246.243
245	10.3.246.244/32	10.3.246.244 – 10.3.246.244	10.3.246.244
246	10.3.246.245/32	10.3.246.245 – 10.3.246.245	10.3.246.245
247	10.3.246.246/32	10.3.246.246 – 10.3.246.246	10.3.246.246
248	10.3.246.247/32	10.3.246.247 – 10.3.246.247	10.3.246.247
249	10.3.246.248/32	10.3.246.248 – 10.3.246.248	10.3.246.248
250	10.3.246.249/32	10.3.246.249 – 10.3.246.249	10.3.246.249
251	10.3.246.250/32	10.3.246.250 – 10.3.246.250	10.3.246.250
252	10.3.246.251/32	10.3.246.251 – 10.3.246.251	10.3.246.251
253	10.3.246.252/32	10.3.246.252 – 10.3.246.252	10.3.246.252
254	10.3.246.253/32	10.3.246.253 – 10.3.246.253	10.3.246.253
255	10.3.246.254/32	10.3.246.254 – 10.3.246.254	10.3.246.254
256	10.3.246.255/32	10.3.246.255 – 10.3.246.255	10.3.246.255

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 →