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)10.3.6.0/23

network10.3.6.0/23

broadcast10.3.7.255

first host10.3.6.1

last host10.3.7.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.6.0/23

address00001010.00000011.00000110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.00000110.00000000

broadcast00001010.00000011.00000111.11111111

green = network part, grey = host part

hex0x0a030600

decimal167970304

reverse dns0.6.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:600

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.3.6.0/32	10.3.6.0 – 10.3.6.0	10.3.6.0
2	10.3.6.1/32	10.3.6.1 – 10.3.6.1	10.3.6.1
3	10.3.6.2/32	10.3.6.2 – 10.3.6.2	10.3.6.2
4	10.3.6.3/32	10.3.6.3 – 10.3.6.3	10.3.6.3
5	10.3.6.4/32	10.3.6.4 – 10.3.6.4	10.3.6.4
6	10.3.6.5/32	10.3.6.5 – 10.3.6.5	10.3.6.5
7	10.3.6.6/32	10.3.6.6 – 10.3.6.6	10.3.6.6
8	10.3.6.7/32	10.3.6.7 – 10.3.6.7	10.3.6.7
9	10.3.6.8/32	10.3.6.8 – 10.3.6.8	10.3.6.8
10	10.3.6.9/32	10.3.6.9 – 10.3.6.9	10.3.6.9
11	10.3.6.10/32	10.3.6.10 – 10.3.6.10	10.3.6.10
12	10.3.6.11/32	10.3.6.11 – 10.3.6.11	10.3.6.11
13	10.3.6.12/32	10.3.6.12 – 10.3.6.12	10.3.6.12
14	10.3.6.13/32	10.3.6.13 – 10.3.6.13	10.3.6.13
15	10.3.6.14/32	10.3.6.14 – 10.3.6.14	10.3.6.14
16	10.3.6.15/32	10.3.6.15 – 10.3.6.15	10.3.6.15
17	10.3.6.16/32	10.3.6.16 – 10.3.6.16	10.3.6.16
18	10.3.6.17/32	10.3.6.17 – 10.3.6.17	10.3.6.17
19	10.3.6.18/32	10.3.6.18 – 10.3.6.18	10.3.6.18
20	10.3.6.19/32	10.3.6.19 – 10.3.6.19	10.3.6.19
21	10.3.6.20/32	10.3.6.20 – 10.3.6.20	10.3.6.20
22	10.3.6.21/32	10.3.6.21 – 10.3.6.21	10.3.6.21
23	10.3.6.22/32	10.3.6.22 – 10.3.6.22	10.3.6.22
24	10.3.6.23/32	10.3.6.23 – 10.3.6.23	10.3.6.23
25	10.3.6.24/32	10.3.6.24 – 10.3.6.24	10.3.6.24
26	10.3.6.25/32	10.3.6.25 – 10.3.6.25	10.3.6.25
27	10.3.6.26/32	10.3.6.26 – 10.3.6.26	10.3.6.26
28	10.3.6.27/32	10.3.6.27 – 10.3.6.27	10.3.6.27
29	10.3.6.28/32	10.3.6.28 – 10.3.6.28	10.3.6.28
30	10.3.6.29/32	10.3.6.29 – 10.3.6.29	10.3.6.29
31	10.3.6.30/32	10.3.6.30 – 10.3.6.30	10.3.6.30
32	10.3.6.31/32	10.3.6.31 – 10.3.6.31	10.3.6.31
33	10.3.6.32/32	10.3.6.32 – 10.3.6.32	10.3.6.32
34	10.3.6.33/32	10.3.6.33 – 10.3.6.33	10.3.6.33
35	10.3.6.34/32	10.3.6.34 – 10.3.6.34	10.3.6.34
36	10.3.6.35/32	10.3.6.35 – 10.3.6.35	10.3.6.35
37	10.3.6.36/32	10.3.6.36 – 10.3.6.36	10.3.6.36
38	10.3.6.37/32	10.3.6.37 – 10.3.6.37	10.3.6.37
39	10.3.6.38/32	10.3.6.38 – 10.3.6.38	10.3.6.38
40	10.3.6.39/32	10.3.6.39 – 10.3.6.39	10.3.6.39
41	10.3.6.40/32	10.3.6.40 – 10.3.6.40	10.3.6.40
42	10.3.6.41/32	10.3.6.41 – 10.3.6.41	10.3.6.41
43	10.3.6.42/32	10.3.6.42 – 10.3.6.42	10.3.6.42
44	10.3.6.43/32	10.3.6.43 – 10.3.6.43	10.3.6.43
45	10.3.6.44/32	10.3.6.44 – 10.3.6.44	10.3.6.44
46	10.3.6.45/32	10.3.6.45 – 10.3.6.45	10.3.6.45
47	10.3.6.46/32	10.3.6.46 – 10.3.6.46	10.3.6.46
48	10.3.6.47/32	10.3.6.47 – 10.3.6.47	10.3.6.47
49	10.3.6.48/32	10.3.6.48 – 10.3.6.48	10.3.6.48
50	10.3.6.49/32	10.3.6.49 – 10.3.6.49	10.3.6.49
51	10.3.6.50/32	10.3.6.50 – 10.3.6.50	10.3.6.50
52	10.3.6.51/32	10.3.6.51 – 10.3.6.51	10.3.6.51
53	10.3.6.52/32	10.3.6.52 – 10.3.6.52	10.3.6.52
54	10.3.6.53/32	10.3.6.53 – 10.3.6.53	10.3.6.53
55	10.3.6.54/32	10.3.6.54 – 10.3.6.54	10.3.6.54
56	10.3.6.55/32	10.3.6.55 – 10.3.6.55	10.3.6.55
57	10.3.6.56/32	10.3.6.56 – 10.3.6.56	10.3.6.56
58	10.3.6.57/32	10.3.6.57 – 10.3.6.57	10.3.6.57
59	10.3.6.58/32	10.3.6.58 – 10.3.6.58	10.3.6.58
60	10.3.6.59/32	10.3.6.59 – 10.3.6.59	10.3.6.59
61	10.3.6.60/32	10.3.6.60 – 10.3.6.60	10.3.6.60
62	10.3.6.61/32	10.3.6.61 – 10.3.6.61	10.3.6.61
63	10.3.6.62/32	10.3.6.62 – 10.3.6.62	10.3.6.62
64	10.3.6.63/32	10.3.6.63 – 10.3.6.63	10.3.6.63
65	10.3.6.64/32	10.3.6.64 – 10.3.6.64	10.3.6.64
66	10.3.6.65/32	10.3.6.65 – 10.3.6.65	10.3.6.65
67	10.3.6.66/32	10.3.6.66 – 10.3.6.66	10.3.6.66
68	10.3.6.67/32	10.3.6.67 – 10.3.6.67	10.3.6.67
69	10.3.6.68/32	10.3.6.68 – 10.3.6.68	10.3.6.68
70	10.3.6.69/32	10.3.6.69 – 10.3.6.69	10.3.6.69
71	10.3.6.70/32	10.3.6.70 – 10.3.6.70	10.3.6.70
72	10.3.6.71/32	10.3.6.71 – 10.3.6.71	10.3.6.71
73	10.3.6.72/32	10.3.6.72 – 10.3.6.72	10.3.6.72
74	10.3.6.73/32	10.3.6.73 – 10.3.6.73	10.3.6.73
75	10.3.6.74/32	10.3.6.74 – 10.3.6.74	10.3.6.74
76	10.3.6.75/32	10.3.6.75 – 10.3.6.75	10.3.6.75
77	10.3.6.76/32	10.3.6.76 – 10.3.6.76	10.3.6.76
78	10.3.6.77/32	10.3.6.77 – 10.3.6.77	10.3.6.77
79	10.3.6.78/32	10.3.6.78 – 10.3.6.78	10.3.6.78
80	10.3.6.79/32	10.3.6.79 – 10.3.6.79	10.3.6.79
81	10.3.6.80/32	10.3.6.80 – 10.3.6.80	10.3.6.80
82	10.3.6.81/32	10.3.6.81 – 10.3.6.81	10.3.6.81
83	10.3.6.82/32	10.3.6.82 – 10.3.6.82	10.3.6.82
84	10.3.6.83/32	10.3.6.83 – 10.3.6.83	10.3.6.83
85	10.3.6.84/32	10.3.6.84 – 10.3.6.84	10.3.6.84
86	10.3.6.85/32	10.3.6.85 – 10.3.6.85	10.3.6.85
87	10.3.6.86/32	10.3.6.86 – 10.3.6.86	10.3.6.86
88	10.3.6.87/32	10.3.6.87 – 10.3.6.87	10.3.6.87
89	10.3.6.88/32	10.3.6.88 – 10.3.6.88	10.3.6.88
90	10.3.6.89/32	10.3.6.89 – 10.3.6.89	10.3.6.89
91	10.3.6.90/32	10.3.6.90 – 10.3.6.90	10.3.6.90
92	10.3.6.91/32	10.3.6.91 – 10.3.6.91	10.3.6.91
93	10.3.6.92/32	10.3.6.92 – 10.3.6.92	10.3.6.92
94	10.3.6.93/32	10.3.6.93 – 10.3.6.93	10.3.6.93
95	10.3.6.94/32	10.3.6.94 – 10.3.6.94	10.3.6.94
96	10.3.6.95/32	10.3.6.95 – 10.3.6.95	10.3.6.95
97	10.3.6.96/32	10.3.6.96 – 10.3.6.96	10.3.6.96
98	10.3.6.97/32	10.3.6.97 – 10.3.6.97	10.3.6.97
99	10.3.6.98/32	10.3.6.98 – 10.3.6.98	10.3.6.98
100	10.3.6.99/32	10.3.6.99 – 10.3.6.99	10.3.6.99
101	10.3.6.100/32	10.3.6.100 – 10.3.6.100	10.3.6.100
102	10.3.6.101/32	10.3.6.101 – 10.3.6.101	10.3.6.101
103	10.3.6.102/32	10.3.6.102 – 10.3.6.102	10.3.6.102
104	10.3.6.103/32	10.3.6.103 – 10.3.6.103	10.3.6.103
105	10.3.6.104/32	10.3.6.104 – 10.3.6.104	10.3.6.104
106	10.3.6.105/32	10.3.6.105 – 10.3.6.105	10.3.6.105
107	10.3.6.106/32	10.3.6.106 – 10.3.6.106	10.3.6.106
108	10.3.6.107/32	10.3.6.107 – 10.3.6.107	10.3.6.107
109	10.3.6.108/32	10.3.6.108 – 10.3.6.108	10.3.6.108
110	10.3.6.109/32	10.3.6.109 – 10.3.6.109	10.3.6.109
111	10.3.6.110/32	10.3.6.110 – 10.3.6.110	10.3.6.110
112	10.3.6.111/32	10.3.6.111 – 10.3.6.111	10.3.6.111
113	10.3.6.112/32	10.3.6.112 – 10.3.6.112	10.3.6.112
114	10.3.6.113/32	10.3.6.113 – 10.3.6.113	10.3.6.113
115	10.3.6.114/32	10.3.6.114 – 10.3.6.114	10.3.6.114
116	10.3.6.115/32	10.3.6.115 – 10.3.6.115	10.3.6.115
117	10.3.6.116/32	10.3.6.116 – 10.3.6.116	10.3.6.116
118	10.3.6.117/32	10.3.6.117 – 10.3.6.117	10.3.6.117
119	10.3.6.118/32	10.3.6.118 – 10.3.6.118	10.3.6.118
120	10.3.6.119/32	10.3.6.119 – 10.3.6.119	10.3.6.119
121	10.3.6.120/32	10.3.6.120 – 10.3.6.120	10.3.6.120
122	10.3.6.121/32	10.3.6.121 – 10.3.6.121	10.3.6.121
123	10.3.6.122/32	10.3.6.122 – 10.3.6.122	10.3.6.122
124	10.3.6.123/32	10.3.6.123 – 10.3.6.123	10.3.6.123
125	10.3.6.124/32	10.3.6.124 – 10.3.6.124	10.3.6.124
126	10.3.6.125/32	10.3.6.125 – 10.3.6.125	10.3.6.125
127	10.3.6.126/32	10.3.6.126 – 10.3.6.126	10.3.6.126
128	10.3.6.127/32	10.3.6.127 – 10.3.6.127	10.3.6.127
129	10.3.6.128/32	10.3.6.128 – 10.3.6.128	10.3.6.128
130	10.3.6.129/32	10.3.6.129 – 10.3.6.129	10.3.6.129
131	10.3.6.130/32	10.3.6.130 – 10.3.6.130	10.3.6.130
132	10.3.6.131/32	10.3.6.131 – 10.3.6.131	10.3.6.131
133	10.3.6.132/32	10.3.6.132 – 10.3.6.132	10.3.6.132
134	10.3.6.133/32	10.3.6.133 – 10.3.6.133	10.3.6.133
135	10.3.6.134/32	10.3.6.134 – 10.3.6.134	10.3.6.134
136	10.3.6.135/32	10.3.6.135 – 10.3.6.135	10.3.6.135
137	10.3.6.136/32	10.3.6.136 – 10.3.6.136	10.3.6.136
138	10.3.6.137/32	10.3.6.137 – 10.3.6.137	10.3.6.137
139	10.3.6.138/32	10.3.6.138 – 10.3.6.138	10.3.6.138
140	10.3.6.139/32	10.3.6.139 – 10.3.6.139	10.3.6.139
141	10.3.6.140/32	10.3.6.140 – 10.3.6.140	10.3.6.140
142	10.3.6.141/32	10.3.6.141 – 10.3.6.141	10.3.6.141
143	10.3.6.142/32	10.3.6.142 – 10.3.6.142	10.3.6.142
144	10.3.6.143/32	10.3.6.143 – 10.3.6.143	10.3.6.143
145	10.3.6.144/32	10.3.6.144 – 10.3.6.144	10.3.6.144
146	10.3.6.145/32	10.3.6.145 – 10.3.6.145	10.3.6.145
147	10.3.6.146/32	10.3.6.146 – 10.3.6.146	10.3.6.146
148	10.3.6.147/32	10.3.6.147 – 10.3.6.147	10.3.6.147
149	10.3.6.148/32	10.3.6.148 – 10.3.6.148	10.3.6.148
150	10.3.6.149/32	10.3.6.149 – 10.3.6.149	10.3.6.149
151	10.3.6.150/32	10.3.6.150 – 10.3.6.150	10.3.6.150
152	10.3.6.151/32	10.3.6.151 – 10.3.6.151	10.3.6.151
153	10.3.6.152/32	10.3.6.152 – 10.3.6.152	10.3.6.152
154	10.3.6.153/32	10.3.6.153 – 10.3.6.153	10.3.6.153
155	10.3.6.154/32	10.3.6.154 – 10.3.6.154	10.3.6.154
156	10.3.6.155/32	10.3.6.155 – 10.3.6.155	10.3.6.155
157	10.3.6.156/32	10.3.6.156 – 10.3.6.156	10.3.6.156
158	10.3.6.157/32	10.3.6.157 – 10.3.6.157	10.3.6.157
159	10.3.6.158/32	10.3.6.158 – 10.3.6.158	10.3.6.158
160	10.3.6.159/32	10.3.6.159 – 10.3.6.159	10.3.6.159
161	10.3.6.160/32	10.3.6.160 – 10.3.6.160	10.3.6.160
162	10.3.6.161/32	10.3.6.161 – 10.3.6.161	10.3.6.161
163	10.3.6.162/32	10.3.6.162 – 10.3.6.162	10.3.6.162
164	10.3.6.163/32	10.3.6.163 – 10.3.6.163	10.3.6.163
165	10.3.6.164/32	10.3.6.164 – 10.3.6.164	10.3.6.164
166	10.3.6.165/32	10.3.6.165 – 10.3.6.165	10.3.6.165
167	10.3.6.166/32	10.3.6.166 – 10.3.6.166	10.3.6.166
168	10.3.6.167/32	10.3.6.167 – 10.3.6.167	10.3.6.167
169	10.3.6.168/32	10.3.6.168 – 10.3.6.168	10.3.6.168
170	10.3.6.169/32	10.3.6.169 – 10.3.6.169	10.3.6.169
171	10.3.6.170/32	10.3.6.170 – 10.3.6.170	10.3.6.170
172	10.3.6.171/32	10.3.6.171 – 10.3.6.171	10.3.6.171
173	10.3.6.172/32	10.3.6.172 – 10.3.6.172	10.3.6.172
174	10.3.6.173/32	10.3.6.173 – 10.3.6.173	10.3.6.173
175	10.3.6.174/32	10.3.6.174 – 10.3.6.174	10.3.6.174
176	10.3.6.175/32	10.3.6.175 – 10.3.6.175	10.3.6.175
177	10.3.6.176/32	10.3.6.176 – 10.3.6.176	10.3.6.176
178	10.3.6.177/32	10.3.6.177 – 10.3.6.177	10.3.6.177
179	10.3.6.178/32	10.3.6.178 – 10.3.6.178	10.3.6.178
180	10.3.6.179/32	10.3.6.179 – 10.3.6.179	10.3.6.179
181	10.3.6.180/32	10.3.6.180 – 10.3.6.180	10.3.6.180
182	10.3.6.181/32	10.3.6.181 – 10.3.6.181	10.3.6.181
183	10.3.6.182/32	10.3.6.182 – 10.3.6.182	10.3.6.182
184	10.3.6.183/32	10.3.6.183 – 10.3.6.183	10.3.6.183
185	10.3.6.184/32	10.3.6.184 – 10.3.6.184	10.3.6.184
186	10.3.6.185/32	10.3.6.185 – 10.3.6.185	10.3.6.185
187	10.3.6.186/32	10.3.6.186 – 10.3.6.186	10.3.6.186
188	10.3.6.187/32	10.3.6.187 – 10.3.6.187	10.3.6.187
189	10.3.6.188/32	10.3.6.188 – 10.3.6.188	10.3.6.188
190	10.3.6.189/32	10.3.6.189 – 10.3.6.189	10.3.6.189
191	10.3.6.190/32	10.3.6.190 – 10.3.6.190	10.3.6.190
192	10.3.6.191/32	10.3.6.191 – 10.3.6.191	10.3.6.191
193	10.3.6.192/32	10.3.6.192 – 10.3.6.192	10.3.6.192
194	10.3.6.193/32	10.3.6.193 – 10.3.6.193	10.3.6.193
195	10.3.6.194/32	10.3.6.194 – 10.3.6.194	10.3.6.194
196	10.3.6.195/32	10.3.6.195 – 10.3.6.195	10.3.6.195
197	10.3.6.196/32	10.3.6.196 – 10.3.6.196	10.3.6.196
198	10.3.6.197/32	10.3.6.197 – 10.3.6.197	10.3.6.197
199	10.3.6.198/32	10.3.6.198 – 10.3.6.198	10.3.6.198
200	10.3.6.199/32	10.3.6.199 – 10.3.6.199	10.3.6.199
201	10.3.6.200/32	10.3.6.200 – 10.3.6.200	10.3.6.200
202	10.3.6.201/32	10.3.6.201 – 10.3.6.201	10.3.6.201
203	10.3.6.202/32	10.3.6.202 – 10.3.6.202	10.3.6.202
204	10.3.6.203/32	10.3.6.203 – 10.3.6.203	10.3.6.203
205	10.3.6.204/32	10.3.6.204 – 10.3.6.204	10.3.6.204
206	10.3.6.205/32	10.3.6.205 – 10.3.6.205	10.3.6.205
207	10.3.6.206/32	10.3.6.206 – 10.3.6.206	10.3.6.206
208	10.3.6.207/32	10.3.6.207 – 10.3.6.207	10.3.6.207
209	10.3.6.208/32	10.3.6.208 – 10.3.6.208	10.3.6.208
210	10.3.6.209/32	10.3.6.209 – 10.3.6.209	10.3.6.209
211	10.3.6.210/32	10.3.6.210 – 10.3.6.210	10.3.6.210
212	10.3.6.211/32	10.3.6.211 – 10.3.6.211	10.3.6.211
213	10.3.6.212/32	10.3.6.212 – 10.3.6.212	10.3.6.212
214	10.3.6.213/32	10.3.6.213 – 10.3.6.213	10.3.6.213
215	10.3.6.214/32	10.3.6.214 – 10.3.6.214	10.3.6.214
216	10.3.6.215/32	10.3.6.215 – 10.3.6.215	10.3.6.215
217	10.3.6.216/32	10.3.6.216 – 10.3.6.216	10.3.6.216
218	10.3.6.217/32	10.3.6.217 – 10.3.6.217	10.3.6.217
219	10.3.6.218/32	10.3.6.218 – 10.3.6.218	10.3.6.218
220	10.3.6.219/32	10.3.6.219 – 10.3.6.219	10.3.6.219
221	10.3.6.220/32	10.3.6.220 – 10.3.6.220	10.3.6.220
222	10.3.6.221/32	10.3.6.221 – 10.3.6.221	10.3.6.221
223	10.3.6.222/32	10.3.6.222 – 10.3.6.222	10.3.6.222
224	10.3.6.223/32	10.3.6.223 – 10.3.6.223	10.3.6.223
225	10.3.6.224/32	10.3.6.224 – 10.3.6.224	10.3.6.224
226	10.3.6.225/32	10.3.6.225 – 10.3.6.225	10.3.6.225
227	10.3.6.226/32	10.3.6.226 – 10.3.6.226	10.3.6.226
228	10.3.6.227/32	10.3.6.227 – 10.3.6.227	10.3.6.227
229	10.3.6.228/32	10.3.6.228 – 10.3.6.228	10.3.6.228
230	10.3.6.229/32	10.3.6.229 – 10.3.6.229	10.3.6.229
231	10.3.6.230/32	10.3.6.230 – 10.3.6.230	10.3.6.230
232	10.3.6.231/32	10.3.6.231 – 10.3.6.231	10.3.6.231
233	10.3.6.232/32	10.3.6.232 – 10.3.6.232	10.3.6.232
234	10.3.6.233/32	10.3.6.233 – 10.3.6.233	10.3.6.233
235	10.3.6.234/32	10.3.6.234 – 10.3.6.234	10.3.6.234
236	10.3.6.235/32	10.3.6.235 – 10.3.6.235	10.3.6.235
237	10.3.6.236/32	10.3.6.236 – 10.3.6.236	10.3.6.236
238	10.3.6.237/32	10.3.6.237 – 10.3.6.237	10.3.6.237
239	10.3.6.238/32	10.3.6.238 – 10.3.6.238	10.3.6.238
240	10.3.6.239/32	10.3.6.239 – 10.3.6.239	10.3.6.239
241	10.3.6.240/32	10.3.6.240 – 10.3.6.240	10.3.6.240
242	10.3.6.241/32	10.3.6.241 – 10.3.6.241	10.3.6.241
243	10.3.6.242/32	10.3.6.242 – 10.3.6.242	10.3.6.242
244	10.3.6.243/32	10.3.6.243 – 10.3.6.243	10.3.6.243
245	10.3.6.244/32	10.3.6.244 – 10.3.6.244	10.3.6.244
246	10.3.6.245/32	10.3.6.245 – 10.3.6.245	10.3.6.245
247	10.3.6.246/32	10.3.6.246 – 10.3.6.246	10.3.6.246
248	10.3.6.247/32	10.3.6.247 – 10.3.6.247	10.3.6.247
249	10.3.6.248/32	10.3.6.248 – 10.3.6.248	10.3.6.248
250	10.3.6.249/32	10.3.6.249 – 10.3.6.249	10.3.6.249
251	10.3.6.250/32	10.3.6.250 – 10.3.6.250	10.3.6.250
252	10.3.6.251/32	10.3.6.251 – 10.3.6.251	10.3.6.251
253	10.3.6.252/32	10.3.6.252 – 10.3.6.252	10.3.6.252
254	10.3.6.253/32	10.3.6.253 – 10.3.6.253	10.3.6.253
255	10.3.6.254/32	10.3.6.254 – 10.3.6.254	10.3.6.254
256	10.3.6.255/32	10.3.6.255 – 10.3.6.255	10.3.6.255

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 →