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)10.40.32.0/23

network10.40.32.0/23

broadcast10.40.33.255

first host10.40.32.1

last host10.40.33.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.40.32.0/23

address00001010.00101000.00100000.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00101000.00100000.00000000

broadcast00001010.00101000.00100001.11111111

green = network part, grey = host part

hex0x0a282000

decimal170401792

reverse dns0.32.40.10.in-addr.arpa

ipv4-mapped::ffff:a28:2000

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.40.32.0/32	10.40.32.0 – 10.40.32.0	10.40.32.0
2	10.40.32.1/32	10.40.32.1 – 10.40.32.1	10.40.32.1
3	10.40.32.2/32	10.40.32.2 – 10.40.32.2	10.40.32.2
4	10.40.32.3/32	10.40.32.3 – 10.40.32.3	10.40.32.3
5	10.40.32.4/32	10.40.32.4 – 10.40.32.4	10.40.32.4
6	10.40.32.5/32	10.40.32.5 – 10.40.32.5	10.40.32.5
7	10.40.32.6/32	10.40.32.6 – 10.40.32.6	10.40.32.6
8	10.40.32.7/32	10.40.32.7 – 10.40.32.7	10.40.32.7
9	10.40.32.8/32	10.40.32.8 – 10.40.32.8	10.40.32.8
10	10.40.32.9/32	10.40.32.9 – 10.40.32.9	10.40.32.9
11	10.40.32.10/32	10.40.32.10 – 10.40.32.10	10.40.32.10
12	10.40.32.11/32	10.40.32.11 – 10.40.32.11	10.40.32.11
13	10.40.32.12/32	10.40.32.12 – 10.40.32.12	10.40.32.12
14	10.40.32.13/32	10.40.32.13 – 10.40.32.13	10.40.32.13
15	10.40.32.14/32	10.40.32.14 – 10.40.32.14	10.40.32.14
16	10.40.32.15/32	10.40.32.15 – 10.40.32.15	10.40.32.15
17	10.40.32.16/32	10.40.32.16 – 10.40.32.16	10.40.32.16
18	10.40.32.17/32	10.40.32.17 – 10.40.32.17	10.40.32.17
19	10.40.32.18/32	10.40.32.18 – 10.40.32.18	10.40.32.18
20	10.40.32.19/32	10.40.32.19 – 10.40.32.19	10.40.32.19
21	10.40.32.20/32	10.40.32.20 – 10.40.32.20	10.40.32.20
22	10.40.32.21/32	10.40.32.21 – 10.40.32.21	10.40.32.21
23	10.40.32.22/32	10.40.32.22 – 10.40.32.22	10.40.32.22
24	10.40.32.23/32	10.40.32.23 – 10.40.32.23	10.40.32.23
25	10.40.32.24/32	10.40.32.24 – 10.40.32.24	10.40.32.24
26	10.40.32.25/32	10.40.32.25 – 10.40.32.25	10.40.32.25
27	10.40.32.26/32	10.40.32.26 – 10.40.32.26	10.40.32.26
28	10.40.32.27/32	10.40.32.27 – 10.40.32.27	10.40.32.27
29	10.40.32.28/32	10.40.32.28 – 10.40.32.28	10.40.32.28
30	10.40.32.29/32	10.40.32.29 – 10.40.32.29	10.40.32.29
31	10.40.32.30/32	10.40.32.30 – 10.40.32.30	10.40.32.30
32	10.40.32.31/32	10.40.32.31 – 10.40.32.31	10.40.32.31
33	10.40.32.32/32	10.40.32.32 – 10.40.32.32	10.40.32.32
34	10.40.32.33/32	10.40.32.33 – 10.40.32.33	10.40.32.33
35	10.40.32.34/32	10.40.32.34 – 10.40.32.34	10.40.32.34
36	10.40.32.35/32	10.40.32.35 – 10.40.32.35	10.40.32.35
37	10.40.32.36/32	10.40.32.36 – 10.40.32.36	10.40.32.36
38	10.40.32.37/32	10.40.32.37 – 10.40.32.37	10.40.32.37
39	10.40.32.38/32	10.40.32.38 – 10.40.32.38	10.40.32.38
40	10.40.32.39/32	10.40.32.39 – 10.40.32.39	10.40.32.39
41	10.40.32.40/32	10.40.32.40 – 10.40.32.40	10.40.32.40
42	10.40.32.41/32	10.40.32.41 – 10.40.32.41	10.40.32.41
43	10.40.32.42/32	10.40.32.42 – 10.40.32.42	10.40.32.42
44	10.40.32.43/32	10.40.32.43 – 10.40.32.43	10.40.32.43
45	10.40.32.44/32	10.40.32.44 – 10.40.32.44	10.40.32.44
46	10.40.32.45/32	10.40.32.45 – 10.40.32.45	10.40.32.45
47	10.40.32.46/32	10.40.32.46 – 10.40.32.46	10.40.32.46
48	10.40.32.47/32	10.40.32.47 – 10.40.32.47	10.40.32.47
49	10.40.32.48/32	10.40.32.48 – 10.40.32.48	10.40.32.48
50	10.40.32.49/32	10.40.32.49 – 10.40.32.49	10.40.32.49
51	10.40.32.50/32	10.40.32.50 – 10.40.32.50	10.40.32.50
52	10.40.32.51/32	10.40.32.51 – 10.40.32.51	10.40.32.51
53	10.40.32.52/32	10.40.32.52 – 10.40.32.52	10.40.32.52
54	10.40.32.53/32	10.40.32.53 – 10.40.32.53	10.40.32.53
55	10.40.32.54/32	10.40.32.54 – 10.40.32.54	10.40.32.54
56	10.40.32.55/32	10.40.32.55 – 10.40.32.55	10.40.32.55
57	10.40.32.56/32	10.40.32.56 – 10.40.32.56	10.40.32.56
58	10.40.32.57/32	10.40.32.57 – 10.40.32.57	10.40.32.57
59	10.40.32.58/32	10.40.32.58 – 10.40.32.58	10.40.32.58
60	10.40.32.59/32	10.40.32.59 – 10.40.32.59	10.40.32.59
61	10.40.32.60/32	10.40.32.60 – 10.40.32.60	10.40.32.60
62	10.40.32.61/32	10.40.32.61 – 10.40.32.61	10.40.32.61
63	10.40.32.62/32	10.40.32.62 – 10.40.32.62	10.40.32.62
64	10.40.32.63/32	10.40.32.63 – 10.40.32.63	10.40.32.63
65	10.40.32.64/32	10.40.32.64 – 10.40.32.64	10.40.32.64
66	10.40.32.65/32	10.40.32.65 – 10.40.32.65	10.40.32.65
67	10.40.32.66/32	10.40.32.66 – 10.40.32.66	10.40.32.66
68	10.40.32.67/32	10.40.32.67 – 10.40.32.67	10.40.32.67
69	10.40.32.68/32	10.40.32.68 – 10.40.32.68	10.40.32.68
70	10.40.32.69/32	10.40.32.69 – 10.40.32.69	10.40.32.69
71	10.40.32.70/32	10.40.32.70 – 10.40.32.70	10.40.32.70
72	10.40.32.71/32	10.40.32.71 – 10.40.32.71	10.40.32.71
73	10.40.32.72/32	10.40.32.72 – 10.40.32.72	10.40.32.72
74	10.40.32.73/32	10.40.32.73 – 10.40.32.73	10.40.32.73
75	10.40.32.74/32	10.40.32.74 – 10.40.32.74	10.40.32.74
76	10.40.32.75/32	10.40.32.75 – 10.40.32.75	10.40.32.75
77	10.40.32.76/32	10.40.32.76 – 10.40.32.76	10.40.32.76
78	10.40.32.77/32	10.40.32.77 – 10.40.32.77	10.40.32.77
79	10.40.32.78/32	10.40.32.78 – 10.40.32.78	10.40.32.78
80	10.40.32.79/32	10.40.32.79 – 10.40.32.79	10.40.32.79
81	10.40.32.80/32	10.40.32.80 – 10.40.32.80	10.40.32.80
82	10.40.32.81/32	10.40.32.81 – 10.40.32.81	10.40.32.81
83	10.40.32.82/32	10.40.32.82 – 10.40.32.82	10.40.32.82
84	10.40.32.83/32	10.40.32.83 – 10.40.32.83	10.40.32.83
85	10.40.32.84/32	10.40.32.84 – 10.40.32.84	10.40.32.84
86	10.40.32.85/32	10.40.32.85 – 10.40.32.85	10.40.32.85
87	10.40.32.86/32	10.40.32.86 – 10.40.32.86	10.40.32.86
88	10.40.32.87/32	10.40.32.87 – 10.40.32.87	10.40.32.87
89	10.40.32.88/32	10.40.32.88 – 10.40.32.88	10.40.32.88
90	10.40.32.89/32	10.40.32.89 – 10.40.32.89	10.40.32.89
91	10.40.32.90/32	10.40.32.90 – 10.40.32.90	10.40.32.90
92	10.40.32.91/32	10.40.32.91 – 10.40.32.91	10.40.32.91
93	10.40.32.92/32	10.40.32.92 – 10.40.32.92	10.40.32.92
94	10.40.32.93/32	10.40.32.93 – 10.40.32.93	10.40.32.93
95	10.40.32.94/32	10.40.32.94 – 10.40.32.94	10.40.32.94
96	10.40.32.95/32	10.40.32.95 – 10.40.32.95	10.40.32.95
97	10.40.32.96/32	10.40.32.96 – 10.40.32.96	10.40.32.96
98	10.40.32.97/32	10.40.32.97 – 10.40.32.97	10.40.32.97
99	10.40.32.98/32	10.40.32.98 – 10.40.32.98	10.40.32.98
100	10.40.32.99/32	10.40.32.99 – 10.40.32.99	10.40.32.99
101	10.40.32.100/32	10.40.32.100 – 10.40.32.100	10.40.32.100
102	10.40.32.101/32	10.40.32.101 – 10.40.32.101	10.40.32.101
103	10.40.32.102/32	10.40.32.102 – 10.40.32.102	10.40.32.102
104	10.40.32.103/32	10.40.32.103 – 10.40.32.103	10.40.32.103
105	10.40.32.104/32	10.40.32.104 – 10.40.32.104	10.40.32.104
106	10.40.32.105/32	10.40.32.105 – 10.40.32.105	10.40.32.105
107	10.40.32.106/32	10.40.32.106 – 10.40.32.106	10.40.32.106
108	10.40.32.107/32	10.40.32.107 – 10.40.32.107	10.40.32.107
109	10.40.32.108/32	10.40.32.108 – 10.40.32.108	10.40.32.108
110	10.40.32.109/32	10.40.32.109 – 10.40.32.109	10.40.32.109
111	10.40.32.110/32	10.40.32.110 – 10.40.32.110	10.40.32.110
112	10.40.32.111/32	10.40.32.111 – 10.40.32.111	10.40.32.111
113	10.40.32.112/32	10.40.32.112 – 10.40.32.112	10.40.32.112
114	10.40.32.113/32	10.40.32.113 – 10.40.32.113	10.40.32.113
115	10.40.32.114/32	10.40.32.114 – 10.40.32.114	10.40.32.114
116	10.40.32.115/32	10.40.32.115 – 10.40.32.115	10.40.32.115
117	10.40.32.116/32	10.40.32.116 – 10.40.32.116	10.40.32.116
118	10.40.32.117/32	10.40.32.117 – 10.40.32.117	10.40.32.117
119	10.40.32.118/32	10.40.32.118 – 10.40.32.118	10.40.32.118
120	10.40.32.119/32	10.40.32.119 – 10.40.32.119	10.40.32.119
121	10.40.32.120/32	10.40.32.120 – 10.40.32.120	10.40.32.120
122	10.40.32.121/32	10.40.32.121 – 10.40.32.121	10.40.32.121
123	10.40.32.122/32	10.40.32.122 – 10.40.32.122	10.40.32.122
124	10.40.32.123/32	10.40.32.123 – 10.40.32.123	10.40.32.123
125	10.40.32.124/32	10.40.32.124 – 10.40.32.124	10.40.32.124
126	10.40.32.125/32	10.40.32.125 – 10.40.32.125	10.40.32.125
127	10.40.32.126/32	10.40.32.126 – 10.40.32.126	10.40.32.126
128	10.40.32.127/32	10.40.32.127 – 10.40.32.127	10.40.32.127
129	10.40.32.128/32	10.40.32.128 – 10.40.32.128	10.40.32.128
130	10.40.32.129/32	10.40.32.129 – 10.40.32.129	10.40.32.129
131	10.40.32.130/32	10.40.32.130 – 10.40.32.130	10.40.32.130
132	10.40.32.131/32	10.40.32.131 – 10.40.32.131	10.40.32.131
133	10.40.32.132/32	10.40.32.132 – 10.40.32.132	10.40.32.132
134	10.40.32.133/32	10.40.32.133 – 10.40.32.133	10.40.32.133
135	10.40.32.134/32	10.40.32.134 – 10.40.32.134	10.40.32.134
136	10.40.32.135/32	10.40.32.135 – 10.40.32.135	10.40.32.135
137	10.40.32.136/32	10.40.32.136 – 10.40.32.136	10.40.32.136
138	10.40.32.137/32	10.40.32.137 – 10.40.32.137	10.40.32.137
139	10.40.32.138/32	10.40.32.138 – 10.40.32.138	10.40.32.138
140	10.40.32.139/32	10.40.32.139 – 10.40.32.139	10.40.32.139
141	10.40.32.140/32	10.40.32.140 – 10.40.32.140	10.40.32.140
142	10.40.32.141/32	10.40.32.141 – 10.40.32.141	10.40.32.141
143	10.40.32.142/32	10.40.32.142 – 10.40.32.142	10.40.32.142
144	10.40.32.143/32	10.40.32.143 – 10.40.32.143	10.40.32.143
145	10.40.32.144/32	10.40.32.144 – 10.40.32.144	10.40.32.144
146	10.40.32.145/32	10.40.32.145 – 10.40.32.145	10.40.32.145
147	10.40.32.146/32	10.40.32.146 – 10.40.32.146	10.40.32.146
148	10.40.32.147/32	10.40.32.147 – 10.40.32.147	10.40.32.147
149	10.40.32.148/32	10.40.32.148 – 10.40.32.148	10.40.32.148
150	10.40.32.149/32	10.40.32.149 – 10.40.32.149	10.40.32.149
151	10.40.32.150/32	10.40.32.150 – 10.40.32.150	10.40.32.150
152	10.40.32.151/32	10.40.32.151 – 10.40.32.151	10.40.32.151
153	10.40.32.152/32	10.40.32.152 – 10.40.32.152	10.40.32.152
154	10.40.32.153/32	10.40.32.153 – 10.40.32.153	10.40.32.153
155	10.40.32.154/32	10.40.32.154 – 10.40.32.154	10.40.32.154
156	10.40.32.155/32	10.40.32.155 – 10.40.32.155	10.40.32.155
157	10.40.32.156/32	10.40.32.156 – 10.40.32.156	10.40.32.156
158	10.40.32.157/32	10.40.32.157 – 10.40.32.157	10.40.32.157
159	10.40.32.158/32	10.40.32.158 – 10.40.32.158	10.40.32.158
160	10.40.32.159/32	10.40.32.159 – 10.40.32.159	10.40.32.159
161	10.40.32.160/32	10.40.32.160 – 10.40.32.160	10.40.32.160
162	10.40.32.161/32	10.40.32.161 – 10.40.32.161	10.40.32.161
163	10.40.32.162/32	10.40.32.162 – 10.40.32.162	10.40.32.162
164	10.40.32.163/32	10.40.32.163 – 10.40.32.163	10.40.32.163
165	10.40.32.164/32	10.40.32.164 – 10.40.32.164	10.40.32.164
166	10.40.32.165/32	10.40.32.165 – 10.40.32.165	10.40.32.165
167	10.40.32.166/32	10.40.32.166 – 10.40.32.166	10.40.32.166
168	10.40.32.167/32	10.40.32.167 – 10.40.32.167	10.40.32.167
169	10.40.32.168/32	10.40.32.168 – 10.40.32.168	10.40.32.168
170	10.40.32.169/32	10.40.32.169 – 10.40.32.169	10.40.32.169
171	10.40.32.170/32	10.40.32.170 – 10.40.32.170	10.40.32.170
172	10.40.32.171/32	10.40.32.171 – 10.40.32.171	10.40.32.171
173	10.40.32.172/32	10.40.32.172 – 10.40.32.172	10.40.32.172
174	10.40.32.173/32	10.40.32.173 – 10.40.32.173	10.40.32.173
175	10.40.32.174/32	10.40.32.174 – 10.40.32.174	10.40.32.174
176	10.40.32.175/32	10.40.32.175 – 10.40.32.175	10.40.32.175
177	10.40.32.176/32	10.40.32.176 – 10.40.32.176	10.40.32.176
178	10.40.32.177/32	10.40.32.177 – 10.40.32.177	10.40.32.177
179	10.40.32.178/32	10.40.32.178 – 10.40.32.178	10.40.32.178
180	10.40.32.179/32	10.40.32.179 – 10.40.32.179	10.40.32.179
181	10.40.32.180/32	10.40.32.180 – 10.40.32.180	10.40.32.180
182	10.40.32.181/32	10.40.32.181 – 10.40.32.181	10.40.32.181
183	10.40.32.182/32	10.40.32.182 – 10.40.32.182	10.40.32.182
184	10.40.32.183/32	10.40.32.183 – 10.40.32.183	10.40.32.183
185	10.40.32.184/32	10.40.32.184 – 10.40.32.184	10.40.32.184
186	10.40.32.185/32	10.40.32.185 – 10.40.32.185	10.40.32.185
187	10.40.32.186/32	10.40.32.186 – 10.40.32.186	10.40.32.186
188	10.40.32.187/32	10.40.32.187 – 10.40.32.187	10.40.32.187
189	10.40.32.188/32	10.40.32.188 – 10.40.32.188	10.40.32.188
190	10.40.32.189/32	10.40.32.189 – 10.40.32.189	10.40.32.189
191	10.40.32.190/32	10.40.32.190 – 10.40.32.190	10.40.32.190
192	10.40.32.191/32	10.40.32.191 – 10.40.32.191	10.40.32.191
193	10.40.32.192/32	10.40.32.192 – 10.40.32.192	10.40.32.192
194	10.40.32.193/32	10.40.32.193 – 10.40.32.193	10.40.32.193
195	10.40.32.194/32	10.40.32.194 – 10.40.32.194	10.40.32.194
196	10.40.32.195/32	10.40.32.195 – 10.40.32.195	10.40.32.195
197	10.40.32.196/32	10.40.32.196 – 10.40.32.196	10.40.32.196
198	10.40.32.197/32	10.40.32.197 – 10.40.32.197	10.40.32.197
199	10.40.32.198/32	10.40.32.198 – 10.40.32.198	10.40.32.198
200	10.40.32.199/32	10.40.32.199 – 10.40.32.199	10.40.32.199
201	10.40.32.200/32	10.40.32.200 – 10.40.32.200	10.40.32.200
202	10.40.32.201/32	10.40.32.201 – 10.40.32.201	10.40.32.201
203	10.40.32.202/32	10.40.32.202 – 10.40.32.202	10.40.32.202
204	10.40.32.203/32	10.40.32.203 – 10.40.32.203	10.40.32.203
205	10.40.32.204/32	10.40.32.204 – 10.40.32.204	10.40.32.204
206	10.40.32.205/32	10.40.32.205 – 10.40.32.205	10.40.32.205
207	10.40.32.206/32	10.40.32.206 – 10.40.32.206	10.40.32.206
208	10.40.32.207/32	10.40.32.207 – 10.40.32.207	10.40.32.207
209	10.40.32.208/32	10.40.32.208 – 10.40.32.208	10.40.32.208
210	10.40.32.209/32	10.40.32.209 – 10.40.32.209	10.40.32.209
211	10.40.32.210/32	10.40.32.210 – 10.40.32.210	10.40.32.210
212	10.40.32.211/32	10.40.32.211 – 10.40.32.211	10.40.32.211
213	10.40.32.212/32	10.40.32.212 – 10.40.32.212	10.40.32.212
214	10.40.32.213/32	10.40.32.213 – 10.40.32.213	10.40.32.213
215	10.40.32.214/32	10.40.32.214 – 10.40.32.214	10.40.32.214
216	10.40.32.215/32	10.40.32.215 – 10.40.32.215	10.40.32.215
217	10.40.32.216/32	10.40.32.216 – 10.40.32.216	10.40.32.216
218	10.40.32.217/32	10.40.32.217 – 10.40.32.217	10.40.32.217
219	10.40.32.218/32	10.40.32.218 – 10.40.32.218	10.40.32.218
220	10.40.32.219/32	10.40.32.219 – 10.40.32.219	10.40.32.219
221	10.40.32.220/32	10.40.32.220 – 10.40.32.220	10.40.32.220
222	10.40.32.221/32	10.40.32.221 – 10.40.32.221	10.40.32.221
223	10.40.32.222/32	10.40.32.222 – 10.40.32.222	10.40.32.222
224	10.40.32.223/32	10.40.32.223 – 10.40.32.223	10.40.32.223
225	10.40.32.224/32	10.40.32.224 – 10.40.32.224	10.40.32.224
226	10.40.32.225/32	10.40.32.225 – 10.40.32.225	10.40.32.225
227	10.40.32.226/32	10.40.32.226 – 10.40.32.226	10.40.32.226
228	10.40.32.227/32	10.40.32.227 – 10.40.32.227	10.40.32.227
229	10.40.32.228/32	10.40.32.228 – 10.40.32.228	10.40.32.228
230	10.40.32.229/32	10.40.32.229 – 10.40.32.229	10.40.32.229
231	10.40.32.230/32	10.40.32.230 – 10.40.32.230	10.40.32.230
232	10.40.32.231/32	10.40.32.231 – 10.40.32.231	10.40.32.231
233	10.40.32.232/32	10.40.32.232 – 10.40.32.232	10.40.32.232
234	10.40.32.233/32	10.40.32.233 – 10.40.32.233	10.40.32.233
235	10.40.32.234/32	10.40.32.234 – 10.40.32.234	10.40.32.234
236	10.40.32.235/32	10.40.32.235 – 10.40.32.235	10.40.32.235
237	10.40.32.236/32	10.40.32.236 – 10.40.32.236	10.40.32.236
238	10.40.32.237/32	10.40.32.237 – 10.40.32.237	10.40.32.237
239	10.40.32.238/32	10.40.32.238 – 10.40.32.238	10.40.32.238
240	10.40.32.239/32	10.40.32.239 – 10.40.32.239	10.40.32.239
241	10.40.32.240/32	10.40.32.240 – 10.40.32.240	10.40.32.240
242	10.40.32.241/32	10.40.32.241 – 10.40.32.241	10.40.32.241
243	10.40.32.242/32	10.40.32.242 – 10.40.32.242	10.40.32.242
244	10.40.32.243/32	10.40.32.243 – 10.40.32.243	10.40.32.243
245	10.40.32.244/32	10.40.32.244 – 10.40.32.244	10.40.32.244
246	10.40.32.245/32	10.40.32.245 – 10.40.32.245	10.40.32.245
247	10.40.32.246/32	10.40.32.246 – 10.40.32.246	10.40.32.246
248	10.40.32.247/32	10.40.32.247 – 10.40.32.247	10.40.32.247
249	10.40.32.248/32	10.40.32.248 – 10.40.32.248	10.40.32.248
250	10.40.32.249/32	10.40.32.249 – 10.40.32.249	10.40.32.249
251	10.40.32.250/32	10.40.32.250 – 10.40.32.250	10.40.32.250
252	10.40.32.251/32	10.40.32.251 – 10.40.32.251	10.40.32.251
253	10.40.32.252/32	10.40.32.252 – 10.40.32.252	10.40.32.252
254	10.40.32.253/32	10.40.32.253 – 10.40.32.253	10.40.32.253
255	10.40.32.254/32	10.40.32.254 – 10.40.32.254	10.40.32.254
256	10.40.32.255/32	10.40.32.255 – 10.40.32.255	10.40.32.255

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 →