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)10.0.73.0/24

network10.0.73.0/24

broadcast10.0.73.255

first host10.0.73.1

last host10.0.73.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.73.0/24

address00001010.00000000.01001001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01001001.00000000

broadcast00001010.00000000.01001001.11111111

green = network part, grey = host part

hex0x0a004900

decimal167790848

reverse dns0.73.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:4900

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.73.0/32	10.0.73.0 – 10.0.73.0	10.0.73.0
2	10.0.73.1/32	10.0.73.1 – 10.0.73.1	10.0.73.1
3	10.0.73.2/32	10.0.73.2 – 10.0.73.2	10.0.73.2
4	10.0.73.3/32	10.0.73.3 – 10.0.73.3	10.0.73.3
5	10.0.73.4/32	10.0.73.4 – 10.0.73.4	10.0.73.4
6	10.0.73.5/32	10.0.73.5 – 10.0.73.5	10.0.73.5
7	10.0.73.6/32	10.0.73.6 – 10.0.73.6	10.0.73.6
8	10.0.73.7/32	10.0.73.7 – 10.0.73.7	10.0.73.7
9	10.0.73.8/32	10.0.73.8 – 10.0.73.8	10.0.73.8
10	10.0.73.9/32	10.0.73.9 – 10.0.73.9	10.0.73.9
11	10.0.73.10/32	10.0.73.10 – 10.0.73.10	10.0.73.10
12	10.0.73.11/32	10.0.73.11 – 10.0.73.11	10.0.73.11
13	10.0.73.12/32	10.0.73.12 – 10.0.73.12	10.0.73.12
14	10.0.73.13/32	10.0.73.13 – 10.0.73.13	10.0.73.13
15	10.0.73.14/32	10.0.73.14 – 10.0.73.14	10.0.73.14
16	10.0.73.15/32	10.0.73.15 – 10.0.73.15	10.0.73.15
17	10.0.73.16/32	10.0.73.16 – 10.0.73.16	10.0.73.16
18	10.0.73.17/32	10.0.73.17 – 10.0.73.17	10.0.73.17
19	10.0.73.18/32	10.0.73.18 – 10.0.73.18	10.0.73.18
20	10.0.73.19/32	10.0.73.19 – 10.0.73.19	10.0.73.19
21	10.0.73.20/32	10.0.73.20 – 10.0.73.20	10.0.73.20
22	10.0.73.21/32	10.0.73.21 – 10.0.73.21	10.0.73.21
23	10.0.73.22/32	10.0.73.22 – 10.0.73.22	10.0.73.22
24	10.0.73.23/32	10.0.73.23 – 10.0.73.23	10.0.73.23
25	10.0.73.24/32	10.0.73.24 – 10.0.73.24	10.0.73.24
26	10.0.73.25/32	10.0.73.25 – 10.0.73.25	10.0.73.25
27	10.0.73.26/32	10.0.73.26 – 10.0.73.26	10.0.73.26
28	10.0.73.27/32	10.0.73.27 – 10.0.73.27	10.0.73.27
29	10.0.73.28/32	10.0.73.28 – 10.0.73.28	10.0.73.28
30	10.0.73.29/32	10.0.73.29 – 10.0.73.29	10.0.73.29
31	10.0.73.30/32	10.0.73.30 – 10.0.73.30	10.0.73.30
32	10.0.73.31/32	10.0.73.31 – 10.0.73.31	10.0.73.31
33	10.0.73.32/32	10.0.73.32 – 10.0.73.32	10.0.73.32
34	10.0.73.33/32	10.0.73.33 – 10.0.73.33	10.0.73.33
35	10.0.73.34/32	10.0.73.34 – 10.0.73.34	10.0.73.34
36	10.0.73.35/32	10.0.73.35 – 10.0.73.35	10.0.73.35
37	10.0.73.36/32	10.0.73.36 – 10.0.73.36	10.0.73.36
38	10.0.73.37/32	10.0.73.37 – 10.0.73.37	10.0.73.37
39	10.0.73.38/32	10.0.73.38 – 10.0.73.38	10.0.73.38
40	10.0.73.39/32	10.0.73.39 – 10.0.73.39	10.0.73.39
41	10.0.73.40/32	10.0.73.40 – 10.0.73.40	10.0.73.40
42	10.0.73.41/32	10.0.73.41 – 10.0.73.41	10.0.73.41
43	10.0.73.42/32	10.0.73.42 – 10.0.73.42	10.0.73.42
44	10.0.73.43/32	10.0.73.43 – 10.0.73.43	10.0.73.43
45	10.0.73.44/32	10.0.73.44 – 10.0.73.44	10.0.73.44
46	10.0.73.45/32	10.0.73.45 – 10.0.73.45	10.0.73.45
47	10.0.73.46/32	10.0.73.46 – 10.0.73.46	10.0.73.46
48	10.0.73.47/32	10.0.73.47 – 10.0.73.47	10.0.73.47
49	10.0.73.48/32	10.0.73.48 – 10.0.73.48	10.0.73.48
50	10.0.73.49/32	10.0.73.49 – 10.0.73.49	10.0.73.49
51	10.0.73.50/32	10.0.73.50 – 10.0.73.50	10.0.73.50
52	10.0.73.51/32	10.0.73.51 – 10.0.73.51	10.0.73.51
53	10.0.73.52/32	10.0.73.52 – 10.0.73.52	10.0.73.52
54	10.0.73.53/32	10.0.73.53 – 10.0.73.53	10.0.73.53
55	10.0.73.54/32	10.0.73.54 – 10.0.73.54	10.0.73.54
56	10.0.73.55/32	10.0.73.55 – 10.0.73.55	10.0.73.55
57	10.0.73.56/32	10.0.73.56 – 10.0.73.56	10.0.73.56
58	10.0.73.57/32	10.0.73.57 – 10.0.73.57	10.0.73.57
59	10.0.73.58/32	10.0.73.58 – 10.0.73.58	10.0.73.58
60	10.0.73.59/32	10.0.73.59 – 10.0.73.59	10.0.73.59
61	10.0.73.60/32	10.0.73.60 – 10.0.73.60	10.0.73.60
62	10.0.73.61/32	10.0.73.61 – 10.0.73.61	10.0.73.61
63	10.0.73.62/32	10.0.73.62 – 10.0.73.62	10.0.73.62
64	10.0.73.63/32	10.0.73.63 – 10.0.73.63	10.0.73.63
65	10.0.73.64/32	10.0.73.64 – 10.0.73.64	10.0.73.64
66	10.0.73.65/32	10.0.73.65 – 10.0.73.65	10.0.73.65
67	10.0.73.66/32	10.0.73.66 – 10.0.73.66	10.0.73.66
68	10.0.73.67/32	10.0.73.67 – 10.0.73.67	10.0.73.67
69	10.0.73.68/32	10.0.73.68 – 10.0.73.68	10.0.73.68
70	10.0.73.69/32	10.0.73.69 – 10.0.73.69	10.0.73.69
71	10.0.73.70/32	10.0.73.70 – 10.0.73.70	10.0.73.70
72	10.0.73.71/32	10.0.73.71 – 10.0.73.71	10.0.73.71
73	10.0.73.72/32	10.0.73.72 – 10.0.73.72	10.0.73.72
74	10.0.73.73/32	10.0.73.73 – 10.0.73.73	10.0.73.73
75	10.0.73.74/32	10.0.73.74 – 10.0.73.74	10.0.73.74
76	10.0.73.75/32	10.0.73.75 – 10.0.73.75	10.0.73.75
77	10.0.73.76/32	10.0.73.76 – 10.0.73.76	10.0.73.76
78	10.0.73.77/32	10.0.73.77 – 10.0.73.77	10.0.73.77
79	10.0.73.78/32	10.0.73.78 – 10.0.73.78	10.0.73.78
80	10.0.73.79/32	10.0.73.79 – 10.0.73.79	10.0.73.79
81	10.0.73.80/32	10.0.73.80 – 10.0.73.80	10.0.73.80
82	10.0.73.81/32	10.0.73.81 – 10.0.73.81	10.0.73.81
83	10.0.73.82/32	10.0.73.82 – 10.0.73.82	10.0.73.82
84	10.0.73.83/32	10.0.73.83 – 10.0.73.83	10.0.73.83
85	10.0.73.84/32	10.0.73.84 – 10.0.73.84	10.0.73.84
86	10.0.73.85/32	10.0.73.85 – 10.0.73.85	10.0.73.85
87	10.0.73.86/32	10.0.73.86 – 10.0.73.86	10.0.73.86
88	10.0.73.87/32	10.0.73.87 – 10.0.73.87	10.0.73.87
89	10.0.73.88/32	10.0.73.88 – 10.0.73.88	10.0.73.88
90	10.0.73.89/32	10.0.73.89 – 10.0.73.89	10.0.73.89
91	10.0.73.90/32	10.0.73.90 – 10.0.73.90	10.0.73.90
92	10.0.73.91/32	10.0.73.91 – 10.0.73.91	10.0.73.91
93	10.0.73.92/32	10.0.73.92 – 10.0.73.92	10.0.73.92
94	10.0.73.93/32	10.0.73.93 – 10.0.73.93	10.0.73.93
95	10.0.73.94/32	10.0.73.94 – 10.0.73.94	10.0.73.94
96	10.0.73.95/32	10.0.73.95 – 10.0.73.95	10.0.73.95
97	10.0.73.96/32	10.0.73.96 – 10.0.73.96	10.0.73.96
98	10.0.73.97/32	10.0.73.97 – 10.0.73.97	10.0.73.97
99	10.0.73.98/32	10.0.73.98 – 10.0.73.98	10.0.73.98
100	10.0.73.99/32	10.0.73.99 – 10.0.73.99	10.0.73.99
101	10.0.73.100/32	10.0.73.100 – 10.0.73.100	10.0.73.100
102	10.0.73.101/32	10.0.73.101 – 10.0.73.101	10.0.73.101
103	10.0.73.102/32	10.0.73.102 – 10.0.73.102	10.0.73.102
104	10.0.73.103/32	10.0.73.103 – 10.0.73.103	10.0.73.103
105	10.0.73.104/32	10.0.73.104 – 10.0.73.104	10.0.73.104
106	10.0.73.105/32	10.0.73.105 – 10.0.73.105	10.0.73.105
107	10.0.73.106/32	10.0.73.106 – 10.0.73.106	10.0.73.106
108	10.0.73.107/32	10.0.73.107 – 10.0.73.107	10.0.73.107
109	10.0.73.108/32	10.0.73.108 – 10.0.73.108	10.0.73.108
110	10.0.73.109/32	10.0.73.109 – 10.0.73.109	10.0.73.109
111	10.0.73.110/32	10.0.73.110 – 10.0.73.110	10.0.73.110
112	10.0.73.111/32	10.0.73.111 – 10.0.73.111	10.0.73.111
113	10.0.73.112/32	10.0.73.112 – 10.0.73.112	10.0.73.112
114	10.0.73.113/32	10.0.73.113 – 10.0.73.113	10.0.73.113
115	10.0.73.114/32	10.0.73.114 – 10.0.73.114	10.0.73.114
116	10.0.73.115/32	10.0.73.115 – 10.0.73.115	10.0.73.115
117	10.0.73.116/32	10.0.73.116 – 10.0.73.116	10.0.73.116
118	10.0.73.117/32	10.0.73.117 – 10.0.73.117	10.0.73.117
119	10.0.73.118/32	10.0.73.118 – 10.0.73.118	10.0.73.118
120	10.0.73.119/32	10.0.73.119 – 10.0.73.119	10.0.73.119
121	10.0.73.120/32	10.0.73.120 – 10.0.73.120	10.0.73.120
122	10.0.73.121/32	10.0.73.121 – 10.0.73.121	10.0.73.121
123	10.0.73.122/32	10.0.73.122 – 10.0.73.122	10.0.73.122
124	10.0.73.123/32	10.0.73.123 – 10.0.73.123	10.0.73.123
125	10.0.73.124/32	10.0.73.124 – 10.0.73.124	10.0.73.124
126	10.0.73.125/32	10.0.73.125 – 10.0.73.125	10.0.73.125
127	10.0.73.126/32	10.0.73.126 – 10.0.73.126	10.0.73.126
128	10.0.73.127/32	10.0.73.127 – 10.0.73.127	10.0.73.127
129	10.0.73.128/32	10.0.73.128 – 10.0.73.128	10.0.73.128
130	10.0.73.129/32	10.0.73.129 – 10.0.73.129	10.0.73.129
131	10.0.73.130/32	10.0.73.130 – 10.0.73.130	10.0.73.130
132	10.0.73.131/32	10.0.73.131 – 10.0.73.131	10.0.73.131
133	10.0.73.132/32	10.0.73.132 – 10.0.73.132	10.0.73.132
134	10.0.73.133/32	10.0.73.133 – 10.0.73.133	10.0.73.133
135	10.0.73.134/32	10.0.73.134 – 10.0.73.134	10.0.73.134
136	10.0.73.135/32	10.0.73.135 – 10.0.73.135	10.0.73.135
137	10.0.73.136/32	10.0.73.136 – 10.0.73.136	10.0.73.136
138	10.0.73.137/32	10.0.73.137 – 10.0.73.137	10.0.73.137
139	10.0.73.138/32	10.0.73.138 – 10.0.73.138	10.0.73.138
140	10.0.73.139/32	10.0.73.139 – 10.0.73.139	10.0.73.139
141	10.0.73.140/32	10.0.73.140 – 10.0.73.140	10.0.73.140
142	10.0.73.141/32	10.0.73.141 – 10.0.73.141	10.0.73.141
143	10.0.73.142/32	10.0.73.142 – 10.0.73.142	10.0.73.142
144	10.0.73.143/32	10.0.73.143 – 10.0.73.143	10.0.73.143
145	10.0.73.144/32	10.0.73.144 – 10.0.73.144	10.0.73.144
146	10.0.73.145/32	10.0.73.145 – 10.0.73.145	10.0.73.145
147	10.0.73.146/32	10.0.73.146 – 10.0.73.146	10.0.73.146
148	10.0.73.147/32	10.0.73.147 – 10.0.73.147	10.0.73.147
149	10.0.73.148/32	10.0.73.148 – 10.0.73.148	10.0.73.148
150	10.0.73.149/32	10.0.73.149 – 10.0.73.149	10.0.73.149
151	10.0.73.150/32	10.0.73.150 – 10.0.73.150	10.0.73.150
152	10.0.73.151/32	10.0.73.151 – 10.0.73.151	10.0.73.151
153	10.0.73.152/32	10.0.73.152 – 10.0.73.152	10.0.73.152
154	10.0.73.153/32	10.0.73.153 – 10.0.73.153	10.0.73.153
155	10.0.73.154/32	10.0.73.154 – 10.0.73.154	10.0.73.154
156	10.0.73.155/32	10.0.73.155 – 10.0.73.155	10.0.73.155
157	10.0.73.156/32	10.0.73.156 – 10.0.73.156	10.0.73.156
158	10.0.73.157/32	10.0.73.157 – 10.0.73.157	10.0.73.157
159	10.0.73.158/32	10.0.73.158 – 10.0.73.158	10.0.73.158
160	10.0.73.159/32	10.0.73.159 – 10.0.73.159	10.0.73.159
161	10.0.73.160/32	10.0.73.160 – 10.0.73.160	10.0.73.160
162	10.0.73.161/32	10.0.73.161 – 10.0.73.161	10.0.73.161
163	10.0.73.162/32	10.0.73.162 – 10.0.73.162	10.0.73.162
164	10.0.73.163/32	10.0.73.163 – 10.0.73.163	10.0.73.163
165	10.0.73.164/32	10.0.73.164 – 10.0.73.164	10.0.73.164
166	10.0.73.165/32	10.0.73.165 – 10.0.73.165	10.0.73.165
167	10.0.73.166/32	10.0.73.166 – 10.0.73.166	10.0.73.166
168	10.0.73.167/32	10.0.73.167 – 10.0.73.167	10.0.73.167
169	10.0.73.168/32	10.0.73.168 – 10.0.73.168	10.0.73.168
170	10.0.73.169/32	10.0.73.169 – 10.0.73.169	10.0.73.169
171	10.0.73.170/32	10.0.73.170 – 10.0.73.170	10.0.73.170
172	10.0.73.171/32	10.0.73.171 – 10.0.73.171	10.0.73.171
173	10.0.73.172/32	10.0.73.172 – 10.0.73.172	10.0.73.172
174	10.0.73.173/32	10.0.73.173 – 10.0.73.173	10.0.73.173
175	10.0.73.174/32	10.0.73.174 – 10.0.73.174	10.0.73.174
176	10.0.73.175/32	10.0.73.175 – 10.0.73.175	10.0.73.175
177	10.0.73.176/32	10.0.73.176 – 10.0.73.176	10.0.73.176
178	10.0.73.177/32	10.0.73.177 – 10.0.73.177	10.0.73.177
179	10.0.73.178/32	10.0.73.178 – 10.0.73.178	10.0.73.178
180	10.0.73.179/32	10.0.73.179 – 10.0.73.179	10.0.73.179
181	10.0.73.180/32	10.0.73.180 – 10.0.73.180	10.0.73.180
182	10.0.73.181/32	10.0.73.181 – 10.0.73.181	10.0.73.181
183	10.0.73.182/32	10.0.73.182 – 10.0.73.182	10.0.73.182
184	10.0.73.183/32	10.0.73.183 – 10.0.73.183	10.0.73.183
185	10.0.73.184/32	10.0.73.184 – 10.0.73.184	10.0.73.184
186	10.0.73.185/32	10.0.73.185 – 10.0.73.185	10.0.73.185
187	10.0.73.186/32	10.0.73.186 – 10.0.73.186	10.0.73.186
188	10.0.73.187/32	10.0.73.187 – 10.0.73.187	10.0.73.187
189	10.0.73.188/32	10.0.73.188 – 10.0.73.188	10.0.73.188
190	10.0.73.189/32	10.0.73.189 – 10.0.73.189	10.0.73.189
191	10.0.73.190/32	10.0.73.190 – 10.0.73.190	10.0.73.190
192	10.0.73.191/32	10.0.73.191 – 10.0.73.191	10.0.73.191
193	10.0.73.192/32	10.0.73.192 – 10.0.73.192	10.0.73.192
194	10.0.73.193/32	10.0.73.193 – 10.0.73.193	10.0.73.193
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196	10.0.73.195/32	10.0.73.195 – 10.0.73.195	10.0.73.195
197	10.0.73.196/32	10.0.73.196 – 10.0.73.196	10.0.73.196
198	10.0.73.197/32	10.0.73.197 – 10.0.73.197	10.0.73.197
199	10.0.73.198/32	10.0.73.198 – 10.0.73.198	10.0.73.198
200	10.0.73.199/32	10.0.73.199 – 10.0.73.199	10.0.73.199
201	10.0.73.200/32	10.0.73.200 – 10.0.73.200	10.0.73.200
202	10.0.73.201/32	10.0.73.201 – 10.0.73.201	10.0.73.201
203	10.0.73.202/32	10.0.73.202 – 10.0.73.202	10.0.73.202
204	10.0.73.203/32	10.0.73.203 – 10.0.73.203	10.0.73.203
205	10.0.73.204/32	10.0.73.204 – 10.0.73.204	10.0.73.204
206	10.0.73.205/32	10.0.73.205 – 10.0.73.205	10.0.73.205
207	10.0.73.206/32	10.0.73.206 – 10.0.73.206	10.0.73.206
208	10.0.73.207/32	10.0.73.207 – 10.0.73.207	10.0.73.207
209	10.0.73.208/32	10.0.73.208 – 10.0.73.208	10.0.73.208
210	10.0.73.209/32	10.0.73.209 – 10.0.73.209	10.0.73.209
211	10.0.73.210/32	10.0.73.210 – 10.0.73.210	10.0.73.210
212	10.0.73.211/32	10.0.73.211 – 10.0.73.211	10.0.73.211
213	10.0.73.212/32	10.0.73.212 – 10.0.73.212	10.0.73.212
214	10.0.73.213/32	10.0.73.213 – 10.0.73.213	10.0.73.213
215	10.0.73.214/32	10.0.73.214 – 10.0.73.214	10.0.73.214
216	10.0.73.215/32	10.0.73.215 – 10.0.73.215	10.0.73.215
217	10.0.73.216/32	10.0.73.216 – 10.0.73.216	10.0.73.216
218	10.0.73.217/32	10.0.73.217 – 10.0.73.217	10.0.73.217
219	10.0.73.218/32	10.0.73.218 – 10.0.73.218	10.0.73.218
220	10.0.73.219/32	10.0.73.219 – 10.0.73.219	10.0.73.219
221	10.0.73.220/32	10.0.73.220 – 10.0.73.220	10.0.73.220
222	10.0.73.221/32	10.0.73.221 – 10.0.73.221	10.0.73.221
223	10.0.73.222/32	10.0.73.222 – 10.0.73.222	10.0.73.222
224	10.0.73.223/32	10.0.73.223 – 10.0.73.223	10.0.73.223
225	10.0.73.224/32	10.0.73.224 – 10.0.73.224	10.0.73.224
226	10.0.73.225/32	10.0.73.225 – 10.0.73.225	10.0.73.225
227	10.0.73.226/32	10.0.73.226 – 10.0.73.226	10.0.73.226
228	10.0.73.227/32	10.0.73.227 – 10.0.73.227	10.0.73.227
229	10.0.73.228/32	10.0.73.228 – 10.0.73.228	10.0.73.228
230	10.0.73.229/32	10.0.73.229 – 10.0.73.229	10.0.73.229
231	10.0.73.230/32	10.0.73.230 – 10.0.73.230	10.0.73.230
232	10.0.73.231/32	10.0.73.231 – 10.0.73.231	10.0.73.231
233	10.0.73.232/32	10.0.73.232 – 10.0.73.232	10.0.73.232
234	10.0.73.233/32	10.0.73.233 – 10.0.73.233	10.0.73.233
235	10.0.73.234/32	10.0.73.234 – 10.0.73.234	10.0.73.234
236	10.0.73.235/32	10.0.73.235 – 10.0.73.235	10.0.73.235
237	10.0.73.236/32	10.0.73.236 – 10.0.73.236	10.0.73.236
238	10.0.73.237/32	10.0.73.237 – 10.0.73.237	10.0.73.237
239	10.0.73.238/32	10.0.73.238 – 10.0.73.238	10.0.73.238
240	10.0.73.239/32	10.0.73.239 – 10.0.73.239	10.0.73.239
241	10.0.73.240/32	10.0.73.240 – 10.0.73.240	10.0.73.240
242	10.0.73.241/32	10.0.73.241 – 10.0.73.241	10.0.73.241
243	10.0.73.242/32	10.0.73.242 – 10.0.73.242	10.0.73.242
244	10.0.73.243/32	10.0.73.243 – 10.0.73.243	10.0.73.243
245	10.0.73.244/32	10.0.73.244 – 10.0.73.244	10.0.73.244
246	10.0.73.245/32	10.0.73.245 – 10.0.73.245	10.0.73.245
247	10.0.73.246/32	10.0.73.246 – 10.0.73.246	10.0.73.246
248	10.0.73.247/32	10.0.73.247 – 10.0.73.247	10.0.73.247
249	10.0.73.248/32	10.0.73.248 – 10.0.73.248	10.0.73.248
250	10.0.73.249/32	10.0.73.249 – 10.0.73.249	10.0.73.249
251	10.0.73.250/32	10.0.73.250 – 10.0.73.250	10.0.73.250
252	10.0.73.251/32	10.0.73.251 – 10.0.73.251	10.0.73.251
253	10.0.73.252/32	10.0.73.252 – 10.0.73.252	10.0.73.252
254	10.0.73.253/32	10.0.73.253 – 10.0.73.253	10.0.73.253
255	10.0.73.254/32	10.0.73.254 – 10.0.73.254	10.0.73.254
256	10.0.73.255/32	10.0.73.255 – 10.0.73.255	10.0.73.255

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 →