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)10.3.150.0/24

network10.3.150.0/24

broadcast10.3.150.255

first host10.3.150.1

last host10.3.150.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.3.150.0/24

address00001010.00000011.10010110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000011.10010110.00000000

broadcast00001010.00000011.10010110.11111111

green = network part, grey = host part

hex0x0a039600

decimal168007168

reverse dns0.150.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:9600

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.3.150.0/32	10.3.150.0 – 10.3.150.0	10.3.150.0
2	10.3.150.1/32	10.3.150.1 – 10.3.150.1	10.3.150.1
3	10.3.150.2/32	10.3.150.2 – 10.3.150.2	10.3.150.2
4	10.3.150.3/32	10.3.150.3 – 10.3.150.3	10.3.150.3
5	10.3.150.4/32	10.3.150.4 – 10.3.150.4	10.3.150.4
6	10.3.150.5/32	10.3.150.5 – 10.3.150.5	10.3.150.5
7	10.3.150.6/32	10.3.150.6 – 10.3.150.6	10.3.150.6
8	10.3.150.7/32	10.3.150.7 – 10.3.150.7	10.3.150.7
9	10.3.150.8/32	10.3.150.8 – 10.3.150.8	10.3.150.8
10	10.3.150.9/32	10.3.150.9 – 10.3.150.9	10.3.150.9
11	10.3.150.10/32	10.3.150.10 – 10.3.150.10	10.3.150.10
12	10.3.150.11/32	10.3.150.11 – 10.3.150.11	10.3.150.11
13	10.3.150.12/32	10.3.150.12 – 10.3.150.12	10.3.150.12
14	10.3.150.13/32	10.3.150.13 – 10.3.150.13	10.3.150.13
15	10.3.150.14/32	10.3.150.14 – 10.3.150.14	10.3.150.14
16	10.3.150.15/32	10.3.150.15 – 10.3.150.15	10.3.150.15
17	10.3.150.16/32	10.3.150.16 – 10.3.150.16	10.3.150.16
18	10.3.150.17/32	10.3.150.17 – 10.3.150.17	10.3.150.17
19	10.3.150.18/32	10.3.150.18 – 10.3.150.18	10.3.150.18
20	10.3.150.19/32	10.3.150.19 – 10.3.150.19	10.3.150.19
21	10.3.150.20/32	10.3.150.20 – 10.3.150.20	10.3.150.20
22	10.3.150.21/32	10.3.150.21 – 10.3.150.21	10.3.150.21
23	10.3.150.22/32	10.3.150.22 – 10.3.150.22	10.3.150.22
24	10.3.150.23/32	10.3.150.23 – 10.3.150.23	10.3.150.23
25	10.3.150.24/32	10.3.150.24 – 10.3.150.24	10.3.150.24
26	10.3.150.25/32	10.3.150.25 – 10.3.150.25	10.3.150.25
27	10.3.150.26/32	10.3.150.26 – 10.3.150.26	10.3.150.26
28	10.3.150.27/32	10.3.150.27 – 10.3.150.27	10.3.150.27
29	10.3.150.28/32	10.3.150.28 – 10.3.150.28	10.3.150.28
30	10.3.150.29/32	10.3.150.29 – 10.3.150.29	10.3.150.29
31	10.3.150.30/32	10.3.150.30 – 10.3.150.30	10.3.150.30
32	10.3.150.31/32	10.3.150.31 – 10.3.150.31	10.3.150.31
33	10.3.150.32/32	10.3.150.32 – 10.3.150.32	10.3.150.32
34	10.3.150.33/32	10.3.150.33 – 10.3.150.33	10.3.150.33
35	10.3.150.34/32	10.3.150.34 – 10.3.150.34	10.3.150.34
36	10.3.150.35/32	10.3.150.35 – 10.3.150.35	10.3.150.35
37	10.3.150.36/32	10.3.150.36 – 10.3.150.36	10.3.150.36
38	10.3.150.37/32	10.3.150.37 – 10.3.150.37	10.3.150.37
39	10.3.150.38/32	10.3.150.38 – 10.3.150.38	10.3.150.38
40	10.3.150.39/32	10.3.150.39 – 10.3.150.39	10.3.150.39
41	10.3.150.40/32	10.3.150.40 – 10.3.150.40	10.3.150.40
42	10.3.150.41/32	10.3.150.41 – 10.3.150.41	10.3.150.41
43	10.3.150.42/32	10.3.150.42 – 10.3.150.42	10.3.150.42
44	10.3.150.43/32	10.3.150.43 – 10.3.150.43	10.3.150.43
45	10.3.150.44/32	10.3.150.44 – 10.3.150.44	10.3.150.44
46	10.3.150.45/32	10.3.150.45 – 10.3.150.45	10.3.150.45
47	10.3.150.46/32	10.3.150.46 – 10.3.150.46	10.3.150.46
48	10.3.150.47/32	10.3.150.47 – 10.3.150.47	10.3.150.47
49	10.3.150.48/32	10.3.150.48 – 10.3.150.48	10.3.150.48
50	10.3.150.49/32	10.3.150.49 – 10.3.150.49	10.3.150.49
51	10.3.150.50/32	10.3.150.50 – 10.3.150.50	10.3.150.50
52	10.3.150.51/32	10.3.150.51 – 10.3.150.51	10.3.150.51
53	10.3.150.52/32	10.3.150.52 – 10.3.150.52	10.3.150.52
54	10.3.150.53/32	10.3.150.53 – 10.3.150.53	10.3.150.53
55	10.3.150.54/32	10.3.150.54 – 10.3.150.54	10.3.150.54
56	10.3.150.55/32	10.3.150.55 – 10.3.150.55	10.3.150.55
57	10.3.150.56/32	10.3.150.56 – 10.3.150.56	10.3.150.56
58	10.3.150.57/32	10.3.150.57 – 10.3.150.57	10.3.150.57
59	10.3.150.58/32	10.3.150.58 – 10.3.150.58	10.3.150.58
60	10.3.150.59/32	10.3.150.59 – 10.3.150.59	10.3.150.59
61	10.3.150.60/32	10.3.150.60 – 10.3.150.60	10.3.150.60
62	10.3.150.61/32	10.3.150.61 – 10.3.150.61	10.3.150.61
63	10.3.150.62/32	10.3.150.62 – 10.3.150.62	10.3.150.62
64	10.3.150.63/32	10.3.150.63 – 10.3.150.63	10.3.150.63
65	10.3.150.64/32	10.3.150.64 – 10.3.150.64	10.3.150.64
66	10.3.150.65/32	10.3.150.65 – 10.3.150.65	10.3.150.65
67	10.3.150.66/32	10.3.150.66 – 10.3.150.66	10.3.150.66
68	10.3.150.67/32	10.3.150.67 – 10.3.150.67	10.3.150.67
69	10.3.150.68/32	10.3.150.68 – 10.3.150.68	10.3.150.68
70	10.3.150.69/32	10.3.150.69 – 10.3.150.69	10.3.150.69
71	10.3.150.70/32	10.3.150.70 – 10.3.150.70	10.3.150.70
72	10.3.150.71/32	10.3.150.71 – 10.3.150.71	10.3.150.71
73	10.3.150.72/32	10.3.150.72 – 10.3.150.72	10.3.150.72
74	10.3.150.73/32	10.3.150.73 – 10.3.150.73	10.3.150.73
75	10.3.150.74/32	10.3.150.74 – 10.3.150.74	10.3.150.74
76	10.3.150.75/32	10.3.150.75 – 10.3.150.75	10.3.150.75
77	10.3.150.76/32	10.3.150.76 – 10.3.150.76	10.3.150.76
78	10.3.150.77/32	10.3.150.77 – 10.3.150.77	10.3.150.77
79	10.3.150.78/32	10.3.150.78 – 10.3.150.78	10.3.150.78
80	10.3.150.79/32	10.3.150.79 – 10.3.150.79	10.3.150.79
81	10.3.150.80/32	10.3.150.80 – 10.3.150.80	10.3.150.80
82	10.3.150.81/32	10.3.150.81 – 10.3.150.81	10.3.150.81
83	10.3.150.82/32	10.3.150.82 – 10.3.150.82	10.3.150.82
84	10.3.150.83/32	10.3.150.83 – 10.3.150.83	10.3.150.83
85	10.3.150.84/32	10.3.150.84 – 10.3.150.84	10.3.150.84
86	10.3.150.85/32	10.3.150.85 – 10.3.150.85	10.3.150.85
87	10.3.150.86/32	10.3.150.86 – 10.3.150.86	10.3.150.86
88	10.3.150.87/32	10.3.150.87 – 10.3.150.87	10.3.150.87
89	10.3.150.88/32	10.3.150.88 – 10.3.150.88	10.3.150.88
90	10.3.150.89/32	10.3.150.89 – 10.3.150.89	10.3.150.89
91	10.3.150.90/32	10.3.150.90 – 10.3.150.90	10.3.150.90
92	10.3.150.91/32	10.3.150.91 – 10.3.150.91	10.3.150.91
93	10.3.150.92/32	10.3.150.92 – 10.3.150.92	10.3.150.92
94	10.3.150.93/32	10.3.150.93 – 10.3.150.93	10.3.150.93
95	10.3.150.94/32	10.3.150.94 – 10.3.150.94	10.3.150.94
96	10.3.150.95/32	10.3.150.95 – 10.3.150.95	10.3.150.95
97	10.3.150.96/32	10.3.150.96 – 10.3.150.96	10.3.150.96
98	10.3.150.97/32	10.3.150.97 – 10.3.150.97	10.3.150.97
99	10.3.150.98/32	10.3.150.98 – 10.3.150.98	10.3.150.98
100	10.3.150.99/32	10.3.150.99 – 10.3.150.99	10.3.150.99
101	10.3.150.100/32	10.3.150.100 – 10.3.150.100	10.3.150.100
102	10.3.150.101/32	10.3.150.101 – 10.3.150.101	10.3.150.101
103	10.3.150.102/32	10.3.150.102 – 10.3.150.102	10.3.150.102
104	10.3.150.103/32	10.3.150.103 – 10.3.150.103	10.3.150.103
105	10.3.150.104/32	10.3.150.104 – 10.3.150.104	10.3.150.104
106	10.3.150.105/32	10.3.150.105 – 10.3.150.105	10.3.150.105
107	10.3.150.106/32	10.3.150.106 – 10.3.150.106	10.3.150.106
108	10.3.150.107/32	10.3.150.107 – 10.3.150.107	10.3.150.107
109	10.3.150.108/32	10.3.150.108 – 10.3.150.108	10.3.150.108
110	10.3.150.109/32	10.3.150.109 – 10.3.150.109	10.3.150.109
111	10.3.150.110/32	10.3.150.110 – 10.3.150.110	10.3.150.110
112	10.3.150.111/32	10.3.150.111 – 10.3.150.111	10.3.150.111
113	10.3.150.112/32	10.3.150.112 – 10.3.150.112	10.3.150.112
114	10.3.150.113/32	10.3.150.113 – 10.3.150.113	10.3.150.113
115	10.3.150.114/32	10.3.150.114 – 10.3.150.114	10.3.150.114
116	10.3.150.115/32	10.3.150.115 – 10.3.150.115	10.3.150.115
117	10.3.150.116/32	10.3.150.116 – 10.3.150.116	10.3.150.116
118	10.3.150.117/32	10.3.150.117 – 10.3.150.117	10.3.150.117
119	10.3.150.118/32	10.3.150.118 – 10.3.150.118	10.3.150.118
120	10.3.150.119/32	10.3.150.119 – 10.3.150.119	10.3.150.119
121	10.3.150.120/32	10.3.150.120 – 10.3.150.120	10.3.150.120
122	10.3.150.121/32	10.3.150.121 – 10.3.150.121	10.3.150.121
123	10.3.150.122/32	10.3.150.122 – 10.3.150.122	10.3.150.122
124	10.3.150.123/32	10.3.150.123 – 10.3.150.123	10.3.150.123
125	10.3.150.124/32	10.3.150.124 – 10.3.150.124	10.3.150.124
126	10.3.150.125/32	10.3.150.125 – 10.3.150.125	10.3.150.125
127	10.3.150.126/32	10.3.150.126 – 10.3.150.126	10.3.150.126
128	10.3.150.127/32	10.3.150.127 – 10.3.150.127	10.3.150.127
129	10.3.150.128/32	10.3.150.128 – 10.3.150.128	10.3.150.128
130	10.3.150.129/32	10.3.150.129 – 10.3.150.129	10.3.150.129
131	10.3.150.130/32	10.3.150.130 – 10.3.150.130	10.3.150.130
132	10.3.150.131/32	10.3.150.131 – 10.3.150.131	10.3.150.131
133	10.3.150.132/32	10.3.150.132 – 10.3.150.132	10.3.150.132
134	10.3.150.133/32	10.3.150.133 – 10.3.150.133	10.3.150.133
135	10.3.150.134/32	10.3.150.134 – 10.3.150.134	10.3.150.134
136	10.3.150.135/32	10.3.150.135 – 10.3.150.135	10.3.150.135
137	10.3.150.136/32	10.3.150.136 – 10.3.150.136	10.3.150.136
138	10.3.150.137/32	10.3.150.137 – 10.3.150.137	10.3.150.137
139	10.3.150.138/32	10.3.150.138 – 10.3.150.138	10.3.150.138
140	10.3.150.139/32	10.3.150.139 – 10.3.150.139	10.3.150.139
141	10.3.150.140/32	10.3.150.140 – 10.3.150.140	10.3.150.140
142	10.3.150.141/32	10.3.150.141 – 10.3.150.141	10.3.150.141
143	10.3.150.142/32	10.3.150.142 – 10.3.150.142	10.3.150.142
144	10.3.150.143/32	10.3.150.143 – 10.3.150.143	10.3.150.143
145	10.3.150.144/32	10.3.150.144 – 10.3.150.144	10.3.150.144
146	10.3.150.145/32	10.3.150.145 – 10.3.150.145	10.3.150.145
147	10.3.150.146/32	10.3.150.146 – 10.3.150.146	10.3.150.146
148	10.3.150.147/32	10.3.150.147 – 10.3.150.147	10.3.150.147
149	10.3.150.148/32	10.3.150.148 – 10.3.150.148	10.3.150.148
150	10.3.150.149/32	10.3.150.149 – 10.3.150.149	10.3.150.149
151	10.3.150.150/32	10.3.150.150 – 10.3.150.150	10.3.150.150
152	10.3.150.151/32	10.3.150.151 – 10.3.150.151	10.3.150.151
153	10.3.150.152/32	10.3.150.152 – 10.3.150.152	10.3.150.152
154	10.3.150.153/32	10.3.150.153 – 10.3.150.153	10.3.150.153
155	10.3.150.154/32	10.3.150.154 – 10.3.150.154	10.3.150.154
156	10.3.150.155/32	10.3.150.155 – 10.3.150.155	10.3.150.155
157	10.3.150.156/32	10.3.150.156 – 10.3.150.156	10.3.150.156
158	10.3.150.157/32	10.3.150.157 – 10.3.150.157	10.3.150.157
159	10.3.150.158/32	10.3.150.158 – 10.3.150.158	10.3.150.158
160	10.3.150.159/32	10.3.150.159 – 10.3.150.159	10.3.150.159
161	10.3.150.160/32	10.3.150.160 – 10.3.150.160	10.3.150.160
162	10.3.150.161/32	10.3.150.161 – 10.3.150.161	10.3.150.161
163	10.3.150.162/32	10.3.150.162 – 10.3.150.162	10.3.150.162
164	10.3.150.163/32	10.3.150.163 – 10.3.150.163	10.3.150.163
165	10.3.150.164/32	10.3.150.164 – 10.3.150.164	10.3.150.164
166	10.3.150.165/32	10.3.150.165 – 10.3.150.165	10.3.150.165
167	10.3.150.166/32	10.3.150.166 – 10.3.150.166	10.3.150.166
168	10.3.150.167/32	10.3.150.167 – 10.3.150.167	10.3.150.167
169	10.3.150.168/32	10.3.150.168 – 10.3.150.168	10.3.150.168
170	10.3.150.169/32	10.3.150.169 – 10.3.150.169	10.3.150.169
171	10.3.150.170/32	10.3.150.170 – 10.3.150.170	10.3.150.170
172	10.3.150.171/32	10.3.150.171 – 10.3.150.171	10.3.150.171
173	10.3.150.172/32	10.3.150.172 – 10.3.150.172	10.3.150.172
174	10.3.150.173/32	10.3.150.173 – 10.3.150.173	10.3.150.173
175	10.3.150.174/32	10.3.150.174 – 10.3.150.174	10.3.150.174
176	10.3.150.175/32	10.3.150.175 – 10.3.150.175	10.3.150.175
177	10.3.150.176/32	10.3.150.176 – 10.3.150.176	10.3.150.176
178	10.3.150.177/32	10.3.150.177 – 10.3.150.177	10.3.150.177
179	10.3.150.178/32	10.3.150.178 – 10.3.150.178	10.3.150.178
180	10.3.150.179/32	10.3.150.179 – 10.3.150.179	10.3.150.179
181	10.3.150.180/32	10.3.150.180 – 10.3.150.180	10.3.150.180
182	10.3.150.181/32	10.3.150.181 – 10.3.150.181	10.3.150.181
183	10.3.150.182/32	10.3.150.182 – 10.3.150.182	10.3.150.182
184	10.3.150.183/32	10.3.150.183 – 10.3.150.183	10.3.150.183
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186	10.3.150.185/32	10.3.150.185 – 10.3.150.185	10.3.150.185
187	10.3.150.186/32	10.3.150.186 – 10.3.150.186	10.3.150.186
188	10.3.150.187/32	10.3.150.187 – 10.3.150.187	10.3.150.187
189	10.3.150.188/32	10.3.150.188 – 10.3.150.188	10.3.150.188
190	10.3.150.189/32	10.3.150.189 – 10.3.150.189	10.3.150.189
191	10.3.150.190/32	10.3.150.190 – 10.3.150.190	10.3.150.190
192	10.3.150.191/32	10.3.150.191 – 10.3.150.191	10.3.150.191
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197	10.3.150.196/32	10.3.150.196 – 10.3.150.196	10.3.150.196
198	10.3.150.197/32	10.3.150.197 – 10.3.150.197	10.3.150.197
199	10.3.150.198/32	10.3.150.198 – 10.3.150.198	10.3.150.198
200	10.3.150.199/32	10.3.150.199 – 10.3.150.199	10.3.150.199
201	10.3.150.200/32	10.3.150.200 – 10.3.150.200	10.3.150.200
202	10.3.150.201/32	10.3.150.201 – 10.3.150.201	10.3.150.201
203	10.3.150.202/32	10.3.150.202 – 10.3.150.202	10.3.150.202
204	10.3.150.203/32	10.3.150.203 – 10.3.150.203	10.3.150.203
205	10.3.150.204/32	10.3.150.204 – 10.3.150.204	10.3.150.204
206	10.3.150.205/32	10.3.150.205 – 10.3.150.205	10.3.150.205
207	10.3.150.206/32	10.3.150.206 – 10.3.150.206	10.3.150.206
208	10.3.150.207/32	10.3.150.207 – 10.3.150.207	10.3.150.207
209	10.3.150.208/32	10.3.150.208 – 10.3.150.208	10.3.150.208
210	10.3.150.209/32	10.3.150.209 – 10.3.150.209	10.3.150.209
211	10.3.150.210/32	10.3.150.210 – 10.3.150.210	10.3.150.210
212	10.3.150.211/32	10.3.150.211 – 10.3.150.211	10.3.150.211
213	10.3.150.212/32	10.3.150.212 – 10.3.150.212	10.3.150.212
214	10.3.150.213/32	10.3.150.213 – 10.3.150.213	10.3.150.213
215	10.3.150.214/32	10.3.150.214 – 10.3.150.214	10.3.150.214
216	10.3.150.215/32	10.3.150.215 – 10.3.150.215	10.3.150.215
217	10.3.150.216/32	10.3.150.216 – 10.3.150.216	10.3.150.216
218	10.3.150.217/32	10.3.150.217 – 10.3.150.217	10.3.150.217
219	10.3.150.218/32	10.3.150.218 – 10.3.150.218	10.3.150.218
220	10.3.150.219/32	10.3.150.219 – 10.3.150.219	10.3.150.219
221	10.3.150.220/32	10.3.150.220 – 10.3.150.220	10.3.150.220
222	10.3.150.221/32	10.3.150.221 – 10.3.150.221	10.3.150.221
223	10.3.150.222/32	10.3.150.222 – 10.3.150.222	10.3.150.222
224	10.3.150.223/32	10.3.150.223 – 10.3.150.223	10.3.150.223
225	10.3.150.224/32	10.3.150.224 – 10.3.150.224	10.3.150.224
226	10.3.150.225/32	10.3.150.225 – 10.3.150.225	10.3.150.225
227	10.3.150.226/32	10.3.150.226 – 10.3.150.226	10.3.150.226
228	10.3.150.227/32	10.3.150.227 – 10.3.150.227	10.3.150.227
229	10.3.150.228/32	10.3.150.228 – 10.3.150.228	10.3.150.228
230	10.3.150.229/32	10.3.150.229 – 10.3.150.229	10.3.150.229
231	10.3.150.230/32	10.3.150.230 – 10.3.150.230	10.3.150.230
232	10.3.150.231/32	10.3.150.231 – 10.3.150.231	10.3.150.231
233	10.3.150.232/32	10.3.150.232 – 10.3.150.232	10.3.150.232
234	10.3.150.233/32	10.3.150.233 – 10.3.150.233	10.3.150.233
235	10.3.150.234/32	10.3.150.234 – 10.3.150.234	10.3.150.234
236	10.3.150.235/32	10.3.150.235 – 10.3.150.235	10.3.150.235
237	10.3.150.236/32	10.3.150.236 – 10.3.150.236	10.3.150.236
238	10.3.150.237/32	10.3.150.237 – 10.3.150.237	10.3.150.237
239	10.3.150.238/32	10.3.150.238 – 10.3.150.238	10.3.150.238
240	10.3.150.239/32	10.3.150.239 – 10.3.150.239	10.3.150.239
241	10.3.150.240/32	10.3.150.240 – 10.3.150.240	10.3.150.240
242	10.3.150.241/32	10.3.150.241 – 10.3.150.241	10.3.150.241
243	10.3.150.242/32	10.3.150.242 – 10.3.150.242	10.3.150.242
244	10.3.150.243/32	10.3.150.243 – 10.3.150.243	10.3.150.243
245	10.3.150.244/32	10.3.150.244 – 10.3.150.244	10.3.150.244
246	10.3.150.245/32	10.3.150.245 – 10.3.150.245	10.3.150.245
247	10.3.150.246/32	10.3.150.246 – 10.3.150.246	10.3.150.246
248	10.3.150.247/32	10.3.150.247 – 10.3.150.247	10.3.150.247
249	10.3.150.248/32	10.3.150.248 – 10.3.150.248	10.3.150.248
250	10.3.150.249/32	10.3.150.249 – 10.3.150.249	10.3.150.249
251	10.3.150.250/32	10.3.150.250 – 10.3.150.250	10.3.150.250
252	10.3.150.251/32	10.3.150.251 – 10.3.150.251	10.3.150.251
253	10.3.150.252/32	10.3.150.252 – 10.3.150.252	10.3.150.252
254	10.3.150.253/32	10.3.150.253 – 10.3.150.253	10.3.150.253
255	10.3.150.254/32	10.3.150.254 – 10.3.150.254	10.3.150.254
256	10.3.150.255/32	10.3.150.255 – 10.3.150.255	10.3.150.255

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