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)10.167.33.0/24

network10.167.33.0/24

broadcast10.167.33.255

first host10.167.33.1

last host10.167.33.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.33.0/24

address00001010.10100111.00100001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.00100001.00000000

broadcast00001010.10100111.00100001.11111111

green = network part, grey = host part

hex0x0aa72100

decimal178725120

reverse dns0.33.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:2100

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.33.0/32	10.167.33.0 – 10.167.33.0	10.167.33.0
2	10.167.33.1/32	10.167.33.1 – 10.167.33.1	10.167.33.1
3	10.167.33.2/32	10.167.33.2 – 10.167.33.2	10.167.33.2
4	10.167.33.3/32	10.167.33.3 – 10.167.33.3	10.167.33.3
5	10.167.33.4/32	10.167.33.4 – 10.167.33.4	10.167.33.4
6	10.167.33.5/32	10.167.33.5 – 10.167.33.5	10.167.33.5
7	10.167.33.6/32	10.167.33.6 – 10.167.33.6	10.167.33.6
8	10.167.33.7/32	10.167.33.7 – 10.167.33.7	10.167.33.7
9	10.167.33.8/32	10.167.33.8 – 10.167.33.8	10.167.33.8
10	10.167.33.9/32	10.167.33.9 – 10.167.33.9	10.167.33.9
11	10.167.33.10/32	10.167.33.10 – 10.167.33.10	10.167.33.10
12	10.167.33.11/32	10.167.33.11 – 10.167.33.11	10.167.33.11
13	10.167.33.12/32	10.167.33.12 – 10.167.33.12	10.167.33.12
14	10.167.33.13/32	10.167.33.13 – 10.167.33.13	10.167.33.13
15	10.167.33.14/32	10.167.33.14 – 10.167.33.14	10.167.33.14
16	10.167.33.15/32	10.167.33.15 – 10.167.33.15	10.167.33.15
17	10.167.33.16/32	10.167.33.16 – 10.167.33.16	10.167.33.16
18	10.167.33.17/32	10.167.33.17 – 10.167.33.17	10.167.33.17
19	10.167.33.18/32	10.167.33.18 – 10.167.33.18	10.167.33.18
20	10.167.33.19/32	10.167.33.19 – 10.167.33.19	10.167.33.19
21	10.167.33.20/32	10.167.33.20 – 10.167.33.20	10.167.33.20
22	10.167.33.21/32	10.167.33.21 – 10.167.33.21	10.167.33.21
23	10.167.33.22/32	10.167.33.22 – 10.167.33.22	10.167.33.22
24	10.167.33.23/32	10.167.33.23 – 10.167.33.23	10.167.33.23
25	10.167.33.24/32	10.167.33.24 – 10.167.33.24	10.167.33.24
26	10.167.33.25/32	10.167.33.25 – 10.167.33.25	10.167.33.25
27	10.167.33.26/32	10.167.33.26 – 10.167.33.26	10.167.33.26
28	10.167.33.27/32	10.167.33.27 – 10.167.33.27	10.167.33.27
29	10.167.33.28/32	10.167.33.28 – 10.167.33.28	10.167.33.28
30	10.167.33.29/32	10.167.33.29 – 10.167.33.29	10.167.33.29
31	10.167.33.30/32	10.167.33.30 – 10.167.33.30	10.167.33.30
32	10.167.33.31/32	10.167.33.31 – 10.167.33.31	10.167.33.31
33	10.167.33.32/32	10.167.33.32 – 10.167.33.32	10.167.33.32
34	10.167.33.33/32	10.167.33.33 – 10.167.33.33	10.167.33.33
35	10.167.33.34/32	10.167.33.34 – 10.167.33.34	10.167.33.34
36	10.167.33.35/32	10.167.33.35 – 10.167.33.35	10.167.33.35
37	10.167.33.36/32	10.167.33.36 – 10.167.33.36	10.167.33.36
38	10.167.33.37/32	10.167.33.37 – 10.167.33.37	10.167.33.37
39	10.167.33.38/32	10.167.33.38 – 10.167.33.38	10.167.33.38
40	10.167.33.39/32	10.167.33.39 – 10.167.33.39	10.167.33.39
41	10.167.33.40/32	10.167.33.40 – 10.167.33.40	10.167.33.40
42	10.167.33.41/32	10.167.33.41 – 10.167.33.41	10.167.33.41
43	10.167.33.42/32	10.167.33.42 – 10.167.33.42	10.167.33.42
44	10.167.33.43/32	10.167.33.43 – 10.167.33.43	10.167.33.43
45	10.167.33.44/32	10.167.33.44 – 10.167.33.44	10.167.33.44
46	10.167.33.45/32	10.167.33.45 – 10.167.33.45	10.167.33.45
47	10.167.33.46/32	10.167.33.46 – 10.167.33.46	10.167.33.46
48	10.167.33.47/32	10.167.33.47 – 10.167.33.47	10.167.33.47
49	10.167.33.48/32	10.167.33.48 – 10.167.33.48	10.167.33.48
50	10.167.33.49/32	10.167.33.49 – 10.167.33.49	10.167.33.49
51	10.167.33.50/32	10.167.33.50 – 10.167.33.50	10.167.33.50
52	10.167.33.51/32	10.167.33.51 – 10.167.33.51	10.167.33.51
53	10.167.33.52/32	10.167.33.52 – 10.167.33.52	10.167.33.52
54	10.167.33.53/32	10.167.33.53 – 10.167.33.53	10.167.33.53
55	10.167.33.54/32	10.167.33.54 – 10.167.33.54	10.167.33.54
56	10.167.33.55/32	10.167.33.55 – 10.167.33.55	10.167.33.55
57	10.167.33.56/32	10.167.33.56 – 10.167.33.56	10.167.33.56
58	10.167.33.57/32	10.167.33.57 – 10.167.33.57	10.167.33.57
59	10.167.33.58/32	10.167.33.58 – 10.167.33.58	10.167.33.58
60	10.167.33.59/32	10.167.33.59 – 10.167.33.59	10.167.33.59
61	10.167.33.60/32	10.167.33.60 – 10.167.33.60	10.167.33.60
62	10.167.33.61/32	10.167.33.61 – 10.167.33.61	10.167.33.61
63	10.167.33.62/32	10.167.33.62 – 10.167.33.62	10.167.33.62
64	10.167.33.63/32	10.167.33.63 – 10.167.33.63	10.167.33.63
65	10.167.33.64/32	10.167.33.64 – 10.167.33.64	10.167.33.64
66	10.167.33.65/32	10.167.33.65 – 10.167.33.65	10.167.33.65
67	10.167.33.66/32	10.167.33.66 – 10.167.33.66	10.167.33.66
68	10.167.33.67/32	10.167.33.67 – 10.167.33.67	10.167.33.67
69	10.167.33.68/32	10.167.33.68 – 10.167.33.68	10.167.33.68
70	10.167.33.69/32	10.167.33.69 – 10.167.33.69	10.167.33.69
71	10.167.33.70/32	10.167.33.70 – 10.167.33.70	10.167.33.70
72	10.167.33.71/32	10.167.33.71 – 10.167.33.71	10.167.33.71
73	10.167.33.72/32	10.167.33.72 – 10.167.33.72	10.167.33.72
74	10.167.33.73/32	10.167.33.73 – 10.167.33.73	10.167.33.73
75	10.167.33.74/32	10.167.33.74 – 10.167.33.74	10.167.33.74
76	10.167.33.75/32	10.167.33.75 – 10.167.33.75	10.167.33.75
77	10.167.33.76/32	10.167.33.76 – 10.167.33.76	10.167.33.76
78	10.167.33.77/32	10.167.33.77 – 10.167.33.77	10.167.33.77
79	10.167.33.78/32	10.167.33.78 – 10.167.33.78	10.167.33.78
80	10.167.33.79/32	10.167.33.79 – 10.167.33.79	10.167.33.79
81	10.167.33.80/32	10.167.33.80 – 10.167.33.80	10.167.33.80
82	10.167.33.81/32	10.167.33.81 – 10.167.33.81	10.167.33.81
83	10.167.33.82/32	10.167.33.82 – 10.167.33.82	10.167.33.82
84	10.167.33.83/32	10.167.33.83 – 10.167.33.83	10.167.33.83
85	10.167.33.84/32	10.167.33.84 – 10.167.33.84	10.167.33.84
86	10.167.33.85/32	10.167.33.85 – 10.167.33.85	10.167.33.85
87	10.167.33.86/32	10.167.33.86 – 10.167.33.86	10.167.33.86
88	10.167.33.87/32	10.167.33.87 – 10.167.33.87	10.167.33.87
89	10.167.33.88/32	10.167.33.88 – 10.167.33.88	10.167.33.88
90	10.167.33.89/32	10.167.33.89 – 10.167.33.89	10.167.33.89
91	10.167.33.90/32	10.167.33.90 – 10.167.33.90	10.167.33.90
92	10.167.33.91/32	10.167.33.91 – 10.167.33.91	10.167.33.91
93	10.167.33.92/32	10.167.33.92 – 10.167.33.92	10.167.33.92
94	10.167.33.93/32	10.167.33.93 – 10.167.33.93	10.167.33.93
95	10.167.33.94/32	10.167.33.94 – 10.167.33.94	10.167.33.94
96	10.167.33.95/32	10.167.33.95 – 10.167.33.95	10.167.33.95
97	10.167.33.96/32	10.167.33.96 – 10.167.33.96	10.167.33.96
98	10.167.33.97/32	10.167.33.97 – 10.167.33.97	10.167.33.97
99	10.167.33.98/32	10.167.33.98 – 10.167.33.98	10.167.33.98
100	10.167.33.99/32	10.167.33.99 – 10.167.33.99	10.167.33.99
101	10.167.33.100/32	10.167.33.100 – 10.167.33.100	10.167.33.100
102	10.167.33.101/32	10.167.33.101 – 10.167.33.101	10.167.33.101
103	10.167.33.102/32	10.167.33.102 – 10.167.33.102	10.167.33.102
104	10.167.33.103/32	10.167.33.103 – 10.167.33.103	10.167.33.103
105	10.167.33.104/32	10.167.33.104 – 10.167.33.104	10.167.33.104
106	10.167.33.105/32	10.167.33.105 – 10.167.33.105	10.167.33.105
107	10.167.33.106/32	10.167.33.106 – 10.167.33.106	10.167.33.106
108	10.167.33.107/32	10.167.33.107 – 10.167.33.107	10.167.33.107
109	10.167.33.108/32	10.167.33.108 – 10.167.33.108	10.167.33.108
110	10.167.33.109/32	10.167.33.109 – 10.167.33.109	10.167.33.109
111	10.167.33.110/32	10.167.33.110 – 10.167.33.110	10.167.33.110
112	10.167.33.111/32	10.167.33.111 – 10.167.33.111	10.167.33.111
113	10.167.33.112/32	10.167.33.112 – 10.167.33.112	10.167.33.112
114	10.167.33.113/32	10.167.33.113 – 10.167.33.113	10.167.33.113
115	10.167.33.114/32	10.167.33.114 – 10.167.33.114	10.167.33.114
116	10.167.33.115/32	10.167.33.115 – 10.167.33.115	10.167.33.115
117	10.167.33.116/32	10.167.33.116 – 10.167.33.116	10.167.33.116
118	10.167.33.117/32	10.167.33.117 – 10.167.33.117	10.167.33.117
119	10.167.33.118/32	10.167.33.118 – 10.167.33.118	10.167.33.118
120	10.167.33.119/32	10.167.33.119 – 10.167.33.119	10.167.33.119
121	10.167.33.120/32	10.167.33.120 – 10.167.33.120	10.167.33.120
122	10.167.33.121/32	10.167.33.121 – 10.167.33.121	10.167.33.121
123	10.167.33.122/32	10.167.33.122 – 10.167.33.122	10.167.33.122
124	10.167.33.123/32	10.167.33.123 – 10.167.33.123	10.167.33.123
125	10.167.33.124/32	10.167.33.124 – 10.167.33.124	10.167.33.124
126	10.167.33.125/32	10.167.33.125 – 10.167.33.125	10.167.33.125
127	10.167.33.126/32	10.167.33.126 – 10.167.33.126	10.167.33.126
128	10.167.33.127/32	10.167.33.127 – 10.167.33.127	10.167.33.127
129	10.167.33.128/32	10.167.33.128 – 10.167.33.128	10.167.33.128
130	10.167.33.129/32	10.167.33.129 – 10.167.33.129	10.167.33.129
131	10.167.33.130/32	10.167.33.130 – 10.167.33.130	10.167.33.130
132	10.167.33.131/32	10.167.33.131 – 10.167.33.131	10.167.33.131
133	10.167.33.132/32	10.167.33.132 – 10.167.33.132	10.167.33.132
134	10.167.33.133/32	10.167.33.133 – 10.167.33.133	10.167.33.133
135	10.167.33.134/32	10.167.33.134 – 10.167.33.134	10.167.33.134
136	10.167.33.135/32	10.167.33.135 – 10.167.33.135	10.167.33.135
137	10.167.33.136/32	10.167.33.136 – 10.167.33.136	10.167.33.136
138	10.167.33.137/32	10.167.33.137 – 10.167.33.137	10.167.33.137
139	10.167.33.138/32	10.167.33.138 – 10.167.33.138	10.167.33.138
140	10.167.33.139/32	10.167.33.139 – 10.167.33.139	10.167.33.139
141	10.167.33.140/32	10.167.33.140 – 10.167.33.140	10.167.33.140
142	10.167.33.141/32	10.167.33.141 – 10.167.33.141	10.167.33.141
143	10.167.33.142/32	10.167.33.142 – 10.167.33.142	10.167.33.142
144	10.167.33.143/32	10.167.33.143 – 10.167.33.143	10.167.33.143
145	10.167.33.144/32	10.167.33.144 – 10.167.33.144	10.167.33.144
146	10.167.33.145/32	10.167.33.145 – 10.167.33.145	10.167.33.145
147	10.167.33.146/32	10.167.33.146 – 10.167.33.146	10.167.33.146
148	10.167.33.147/32	10.167.33.147 – 10.167.33.147	10.167.33.147
149	10.167.33.148/32	10.167.33.148 – 10.167.33.148	10.167.33.148
150	10.167.33.149/32	10.167.33.149 – 10.167.33.149	10.167.33.149
151	10.167.33.150/32	10.167.33.150 – 10.167.33.150	10.167.33.150
152	10.167.33.151/32	10.167.33.151 – 10.167.33.151	10.167.33.151
153	10.167.33.152/32	10.167.33.152 – 10.167.33.152	10.167.33.152
154	10.167.33.153/32	10.167.33.153 – 10.167.33.153	10.167.33.153
155	10.167.33.154/32	10.167.33.154 – 10.167.33.154	10.167.33.154
156	10.167.33.155/32	10.167.33.155 – 10.167.33.155	10.167.33.155
157	10.167.33.156/32	10.167.33.156 – 10.167.33.156	10.167.33.156
158	10.167.33.157/32	10.167.33.157 – 10.167.33.157	10.167.33.157
159	10.167.33.158/32	10.167.33.158 – 10.167.33.158	10.167.33.158
160	10.167.33.159/32	10.167.33.159 – 10.167.33.159	10.167.33.159
161	10.167.33.160/32	10.167.33.160 – 10.167.33.160	10.167.33.160
162	10.167.33.161/32	10.167.33.161 – 10.167.33.161	10.167.33.161
163	10.167.33.162/32	10.167.33.162 – 10.167.33.162	10.167.33.162
164	10.167.33.163/32	10.167.33.163 – 10.167.33.163	10.167.33.163
165	10.167.33.164/32	10.167.33.164 – 10.167.33.164	10.167.33.164
166	10.167.33.165/32	10.167.33.165 – 10.167.33.165	10.167.33.165
167	10.167.33.166/32	10.167.33.166 – 10.167.33.166	10.167.33.166
168	10.167.33.167/32	10.167.33.167 – 10.167.33.167	10.167.33.167
169	10.167.33.168/32	10.167.33.168 – 10.167.33.168	10.167.33.168
170	10.167.33.169/32	10.167.33.169 – 10.167.33.169	10.167.33.169
171	10.167.33.170/32	10.167.33.170 – 10.167.33.170	10.167.33.170
172	10.167.33.171/32	10.167.33.171 – 10.167.33.171	10.167.33.171
173	10.167.33.172/32	10.167.33.172 – 10.167.33.172	10.167.33.172
174	10.167.33.173/32	10.167.33.173 – 10.167.33.173	10.167.33.173
175	10.167.33.174/32	10.167.33.174 – 10.167.33.174	10.167.33.174
176	10.167.33.175/32	10.167.33.175 – 10.167.33.175	10.167.33.175
177	10.167.33.176/32	10.167.33.176 – 10.167.33.176	10.167.33.176
178	10.167.33.177/32	10.167.33.177 – 10.167.33.177	10.167.33.177
179	10.167.33.178/32	10.167.33.178 – 10.167.33.178	10.167.33.178
180	10.167.33.179/32	10.167.33.179 – 10.167.33.179	10.167.33.179
181	10.167.33.180/32	10.167.33.180 – 10.167.33.180	10.167.33.180
182	10.167.33.181/32	10.167.33.181 – 10.167.33.181	10.167.33.181
183	10.167.33.182/32	10.167.33.182 – 10.167.33.182	10.167.33.182
184	10.167.33.183/32	10.167.33.183 – 10.167.33.183	10.167.33.183
185	10.167.33.184/32	10.167.33.184 – 10.167.33.184	10.167.33.184
186	10.167.33.185/32	10.167.33.185 – 10.167.33.185	10.167.33.185
187	10.167.33.186/32	10.167.33.186 – 10.167.33.186	10.167.33.186
188	10.167.33.187/32	10.167.33.187 – 10.167.33.187	10.167.33.187
189	10.167.33.188/32	10.167.33.188 – 10.167.33.188	10.167.33.188
190	10.167.33.189/32	10.167.33.189 – 10.167.33.189	10.167.33.189
191	10.167.33.190/32	10.167.33.190 – 10.167.33.190	10.167.33.190
192	10.167.33.191/32	10.167.33.191 – 10.167.33.191	10.167.33.191
193	10.167.33.192/32	10.167.33.192 – 10.167.33.192	10.167.33.192
194	10.167.33.193/32	10.167.33.193 – 10.167.33.193	10.167.33.193
195	10.167.33.194/32	10.167.33.194 – 10.167.33.194	10.167.33.194
196	10.167.33.195/32	10.167.33.195 – 10.167.33.195	10.167.33.195
197	10.167.33.196/32	10.167.33.196 – 10.167.33.196	10.167.33.196
198	10.167.33.197/32	10.167.33.197 – 10.167.33.197	10.167.33.197
199	10.167.33.198/32	10.167.33.198 – 10.167.33.198	10.167.33.198
200	10.167.33.199/32	10.167.33.199 – 10.167.33.199	10.167.33.199
201	10.167.33.200/32	10.167.33.200 – 10.167.33.200	10.167.33.200
202	10.167.33.201/32	10.167.33.201 – 10.167.33.201	10.167.33.201
203	10.167.33.202/32	10.167.33.202 – 10.167.33.202	10.167.33.202
204	10.167.33.203/32	10.167.33.203 – 10.167.33.203	10.167.33.203
205	10.167.33.204/32	10.167.33.204 – 10.167.33.204	10.167.33.204
206	10.167.33.205/32	10.167.33.205 – 10.167.33.205	10.167.33.205
207	10.167.33.206/32	10.167.33.206 – 10.167.33.206	10.167.33.206
208	10.167.33.207/32	10.167.33.207 – 10.167.33.207	10.167.33.207
209	10.167.33.208/32	10.167.33.208 – 10.167.33.208	10.167.33.208
210	10.167.33.209/32	10.167.33.209 – 10.167.33.209	10.167.33.209
211	10.167.33.210/32	10.167.33.210 – 10.167.33.210	10.167.33.210
212	10.167.33.211/32	10.167.33.211 – 10.167.33.211	10.167.33.211
213	10.167.33.212/32	10.167.33.212 – 10.167.33.212	10.167.33.212
214	10.167.33.213/32	10.167.33.213 – 10.167.33.213	10.167.33.213
215	10.167.33.214/32	10.167.33.214 – 10.167.33.214	10.167.33.214
216	10.167.33.215/32	10.167.33.215 – 10.167.33.215	10.167.33.215
217	10.167.33.216/32	10.167.33.216 – 10.167.33.216	10.167.33.216
218	10.167.33.217/32	10.167.33.217 – 10.167.33.217	10.167.33.217
219	10.167.33.218/32	10.167.33.218 – 10.167.33.218	10.167.33.218
220	10.167.33.219/32	10.167.33.219 – 10.167.33.219	10.167.33.219
221	10.167.33.220/32	10.167.33.220 – 10.167.33.220	10.167.33.220
222	10.167.33.221/32	10.167.33.221 – 10.167.33.221	10.167.33.221
223	10.167.33.222/32	10.167.33.222 – 10.167.33.222	10.167.33.222
224	10.167.33.223/32	10.167.33.223 – 10.167.33.223	10.167.33.223
225	10.167.33.224/32	10.167.33.224 – 10.167.33.224	10.167.33.224
226	10.167.33.225/32	10.167.33.225 – 10.167.33.225	10.167.33.225
227	10.167.33.226/32	10.167.33.226 – 10.167.33.226	10.167.33.226
228	10.167.33.227/32	10.167.33.227 – 10.167.33.227	10.167.33.227
229	10.167.33.228/32	10.167.33.228 – 10.167.33.228	10.167.33.228
230	10.167.33.229/32	10.167.33.229 – 10.167.33.229	10.167.33.229
231	10.167.33.230/32	10.167.33.230 – 10.167.33.230	10.167.33.230
232	10.167.33.231/32	10.167.33.231 – 10.167.33.231	10.167.33.231
233	10.167.33.232/32	10.167.33.232 – 10.167.33.232	10.167.33.232
234	10.167.33.233/32	10.167.33.233 – 10.167.33.233	10.167.33.233
235	10.167.33.234/32	10.167.33.234 – 10.167.33.234	10.167.33.234
236	10.167.33.235/32	10.167.33.235 – 10.167.33.235	10.167.33.235
237	10.167.33.236/32	10.167.33.236 – 10.167.33.236	10.167.33.236
238	10.167.33.237/32	10.167.33.237 – 10.167.33.237	10.167.33.237
239	10.167.33.238/32	10.167.33.238 – 10.167.33.238	10.167.33.238
240	10.167.33.239/32	10.167.33.239 – 10.167.33.239	10.167.33.239
241	10.167.33.240/32	10.167.33.240 – 10.167.33.240	10.167.33.240
242	10.167.33.241/32	10.167.33.241 – 10.167.33.241	10.167.33.241
243	10.167.33.242/32	10.167.33.242 – 10.167.33.242	10.167.33.242
244	10.167.33.243/32	10.167.33.243 – 10.167.33.243	10.167.33.243
245	10.167.33.244/32	10.167.33.244 – 10.167.33.244	10.167.33.244
246	10.167.33.245/32	10.167.33.245 – 10.167.33.245	10.167.33.245
247	10.167.33.246/32	10.167.33.246 – 10.167.33.246	10.167.33.246
248	10.167.33.247/32	10.167.33.247 – 10.167.33.247	10.167.33.247
249	10.167.33.248/32	10.167.33.248 – 10.167.33.248	10.167.33.248
250	10.167.33.249/32	10.167.33.249 – 10.167.33.249	10.167.33.249
251	10.167.33.250/32	10.167.33.250 – 10.167.33.250	10.167.33.250
252	10.167.33.251/32	10.167.33.251 – 10.167.33.251	10.167.33.251
253	10.167.33.252/32	10.167.33.252 – 10.167.33.252	10.167.33.252
254	10.167.33.253/32	10.167.33.253 – 10.167.33.253	10.167.33.253
255	10.167.33.254/32	10.167.33.254 – 10.167.33.254	10.167.33.254
256	10.167.33.255/32	10.167.33.255 – 10.167.33.255	10.167.33.255

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 →