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)10.0.75.0/24

network10.0.75.0/24

broadcast10.0.75.255

first host10.0.75.1

last host10.0.75.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.75.0/24

address00001010.00000000.01001011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01001011.00000000

broadcast00001010.00000000.01001011.11111111

green = network part, grey = host part

hex0x0a004b00

decimal167791360

reverse dns0.75.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:4b00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.75.0/32	10.0.75.0 – 10.0.75.0	10.0.75.0
2	10.0.75.1/32	10.0.75.1 – 10.0.75.1	10.0.75.1
3	10.0.75.2/32	10.0.75.2 – 10.0.75.2	10.0.75.2
4	10.0.75.3/32	10.0.75.3 – 10.0.75.3	10.0.75.3
5	10.0.75.4/32	10.0.75.4 – 10.0.75.4	10.0.75.4
6	10.0.75.5/32	10.0.75.5 – 10.0.75.5	10.0.75.5
7	10.0.75.6/32	10.0.75.6 – 10.0.75.6	10.0.75.6
8	10.0.75.7/32	10.0.75.7 – 10.0.75.7	10.0.75.7
9	10.0.75.8/32	10.0.75.8 – 10.0.75.8	10.0.75.8
10	10.0.75.9/32	10.0.75.9 – 10.0.75.9	10.0.75.9
11	10.0.75.10/32	10.0.75.10 – 10.0.75.10	10.0.75.10
12	10.0.75.11/32	10.0.75.11 – 10.0.75.11	10.0.75.11
13	10.0.75.12/32	10.0.75.12 – 10.0.75.12	10.0.75.12
14	10.0.75.13/32	10.0.75.13 – 10.0.75.13	10.0.75.13
15	10.0.75.14/32	10.0.75.14 – 10.0.75.14	10.0.75.14
16	10.0.75.15/32	10.0.75.15 – 10.0.75.15	10.0.75.15
17	10.0.75.16/32	10.0.75.16 – 10.0.75.16	10.0.75.16
18	10.0.75.17/32	10.0.75.17 – 10.0.75.17	10.0.75.17
19	10.0.75.18/32	10.0.75.18 – 10.0.75.18	10.0.75.18
20	10.0.75.19/32	10.0.75.19 – 10.0.75.19	10.0.75.19
21	10.0.75.20/32	10.0.75.20 – 10.0.75.20	10.0.75.20
22	10.0.75.21/32	10.0.75.21 – 10.0.75.21	10.0.75.21
23	10.0.75.22/32	10.0.75.22 – 10.0.75.22	10.0.75.22
24	10.0.75.23/32	10.0.75.23 – 10.0.75.23	10.0.75.23
25	10.0.75.24/32	10.0.75.24 – 10.0.75.24	10.0.75.24
26	10.0.75.25/32	10.0.75.25 – 10.0.75.25	10.0.75.25
27	10.0.75.26/32	10.0.75.26 – 10.0.75.26	10.0.75.26
28	10.0.75.27/32	10.0.75.27 – 10.0.75.27	10.0.75.27
29	10.0.75.28/32	10.0.75.28 – 10.0.75.28	10.0.75.28
30	10.0.75.29/32	10.0.75.29 – 10.0.75.29	10.0.75.29
31	10.0.75.30/32	10.0.75.30 – 10.0.75.30	10.0.75.30
32	10.0.75.31/32	10.0.75.31 – 10.0.75.31	10.0.75.31
33	10.0.75.32/32	10.0.75.32 – 10.0.75.32	10.0.75.32
34	10.0.75.33/32	10.0.75.33 – 10.0.75.33	10.0.75.33
35	10.0.75.34/32	10.0.75.34 – 10.0.75.34	10.0.75.34
36	10.0.75.35/32	10.0.75.35 – 10.0.75.35	10.0.75.35
37	10.0.75.36/32	10.0.75.36 – 10.0.75.36	10.0.75.36
38	10.0.75.37/32	10.0.75.37 – 10.0.75.37	10.0.75.37
39	10.0.75.38/32	10.0.75.38 – 10.0.75.38	10.0.75.38
40	10.0.75.39/32	10.0.75.39 – 10.0.75.39	10.0.75.39
41	10.0.75.40/32	10.0.75.40 – 10.0.75.40	10.0.75.40
42	10.0.75.41/32	10.0.75.41 – 10.0.75.41	10.0.75.41
43	10.0.75.42/32	10.0.75.42 – 10.0.75.42	10.0.75.42
44	10.0.75.43/32	10.0.75.43 – 10.0.75.43	10.0.75.43
45	10.0.75.44/32	10.0.75.44 – 10.0.75.44	10.0.75.44
46	10.0.75.45/32	10.0.75.45 – 10.0.75.45	10.0.75.45
47	10.0.75.46/32	10.0.75.46 – 10.0.75.46	10.0.75.46
48	10.0.75.47/32	10.0.75.47 – 10.0.75.47	10.0.75.47
49	10.0.75.48/32	10.0.75.48 – 10.0.75.48	10.0.75.48
50	10.0.75.49/32	10.0.75.49 – 10.0.75.49	10.0.75.49
51	10.0.75.50/32	10.0.75.50 – 10.0.75.50	10.0.75.50
52	10.0.75.51/32	10.0.75.51 – 10.0.75.51	10.0.75.51
53	10.0.75.52/32	10.0.75.52 – 10.0.75.52	10.0.75.52
54	10.0.75.53/32	10.0.75.53 – 10.0.75.53	10.0.75.53
55	10.0.75.54/32	10.0.75.54 – 10.0.75.54	10.0.75.54
56	10.0.75.55/32	10.0.75.55 – 10.0.75.55	10.0.75.55
57	10.0.75.56/32	10.0.75.56 – 10.0.75.56	10.0.75.56
58	10.0.75.57/32	10.0.75.57 – 10.0.75.57	10.0.75.57
59	10.0.75.58/32	10.0.75.58 – 10.0.75.58	10.0.75.58
60	10.0.75.59/32	10.0.75.59 – 10.0.75.59	10.0.75.59
61	10.0.75.60/32	10.0.75.60 – 10.0.75.60	10.0.75.60
62	10.0.75.61/32	10.0.75.61 – 10.0.75.61	10.0.75.61
63	10.0.75.62/32	10.0.75.62 – 10.0.75.62	10.0.75.62
64	10.0.75.63/32	10.0.75.63 – 10.0.75.63	10.0.75.63
65	10.0.75.64/32	10.0.75.64 – 10.0.75.64	10.0.75.64
66	10.0.75.65/32	10.0.75.65 – 10.0.75.65	10.0.75.65
67	10.0.75.66/32	10.0.75.66 – 10.0.75.66	10.0.75.66
68	10.0.75.67/32	10.0.75.67 – 10.0.75.67	10.0.75.67
69	10.0.75.68/32	10.0.75.68 – 10.0.75.68	10.0.75.68
70	10.0.75.69/32	10.0.75.69 – 10.0.75.69	10.0.75.69
71	10.0.75.70/32	10.0.75.70 – 10.0.75.70	10.0.75.70
72	10.0.75.71/32	10.0.75.71 – 10.0.75.71	10.0.75.71
73	10.0.75.72/32	10.0.75.72 – 10.0.75.72	10.0.75.72
74	10.0.75.73/32	10.0.75.73 – 10.0.75.73	10.0.75.73
75	10.0.75.74/32	10.0.75.74 – 10.0.75.74	10.0.75.74
76	10.0.75.75/32	10.0.75.75 – 10.0.75.75	10.0.75.75
77	10.0.75.76/32	10.0.75.76 – 10.0.75.76	10.0.75.76
78	10.0.75.77/32	10.0.75.77 – 10.0.75.77	10.0.75.77
79	10.0.75.78/32	10.0.75.78 – 10.0.75.78	10.0.75.78
80	10.0.75.79/32	10.0.75.79 – 10.0.75.79	10.0.75.79
81	10.0.75.80/32	10.0.75.80 – 10.0.75.80	10.0.75.80
82	10.0.75.81/32	10.0.75.81 – 10.0.75.81	10.0.75.81
83	10.0.75.82/32	10.0.75.82 – 10.0.75.82	10.0.75.82
84	10.0.75.83/32	10.0.75.83 – 10.0.75.83	10.0.75.83
85	10.0.75.84/32	10.0.75.84 – 10.0.75.84	10.0.75.84
86	10.0.75.85/32	10.0.75.85 – 10.0.75.85	10.0.75.85
87	10.0.75.86/32	10.0.75.86 – 10.0.75.86	10.0.75.86
88	10.0.75.87/32	10.0.75.87 – 10.0.75.87	10.0.75.87
89	10.0.75.88/32	10.0.75.88 – 10.0.75.88	10.0.75.88
90	10.0.75.89/32	10.0.75.89 – 10.0.75.89	10.0.75.89
91	10.0.75.90/32	10.0.75.90 – 10.0.75.90	10.0.75.90
92	10.0.75.91/32	10.0.75.91 – 10.0.75.91	10.0.75.91
93	10.0.75.92/32	10.0.75.92 – 10.0.75.92	10.0.75.92
94	10.0.75.93/32	10.0.75.93 – 10.0.75.93	10.0.75.93
95	10.0.75.94/32	10.0.75.94 – 10.0.75.94	10.0.75.94
96	10.0.75.95/32	10.0.75.95 – 10.0.75.95	10.0.75.95
97	10.0.75.96/32	10.0.75.96 – 10.0.75.96	10.0.75.96
98	10.0.75.97/32	10.0.75.97 – 10.0.75.97	10.0.75.97
99	10.0.75.98/32	10.0.75.98 – 10.0.75.98	10.0.75.98
100	10.0.75.99/32	10.0.75.99 – 10.0.75.99	10.0.75.99
101	10.0.75.100/32	10.0.75.100 – 10.0.75.100	10.0.75.100
102	10.0.75.101/32	10.0.75.101 – 10.0.75.101	10.0.75.101
103	10.0.75.102/32	10.0.75.102 – 10.0.75.102	10.0.75.102
104	10.0.75.103/32	10.0.75.103 – 10.0.75.103	10.0.75.103
105	10.0.75.104/32	10.0.75.104 – 10.0.75.104	10.0.75.104
106	10.0.75.105/32	10.0.75.105 – 10.0.75.105	10.0.75.105
107	10.0.75.106/32	10.0.75.106 – 10.0.75.106	10.0.75.106
108	10.0.75.107/32	10.0.75.107 – 10.0.75.107	10.0.75.107
109	10.0.75.108/32	10.0.75.108 – 10.0.75.108	10.0.75.108
110	10.0.75.109/32	10.0.75.109 – 10.0.75.109	10.0.75.109
111	10.0.75.110/32	10.0.75.110 – 10.0.75.110	10.0.75.110
112	10.0.75.111/32	10.0.75.111 – 10.0.75.111	10.0.75.111
113	10.0.75.112/32	10.0.75.112 – 10.0.75.112	10.0.75.112
114	10.0.75.113/32	10.0.75.113 – 10.0.75.113	10.0.75.113
115	10.0.75.114/32	10.0.75.114 – 10.0.75.114	10.0.75.114
116	10.0.75.115/32	10.0.75.115 – 10.0.75.115	10.0.75.115
117	10.0.75.116/32	10.0.75.116 – 10.0.75.116	10.0.75.116
118	10.0.75.117/32	10.0.75.117 – 10.0.75.117	10.0.75.117
119	10.0.75.118/32	10.0.75.118 – 10.0.75.118	10.0.75.118
120	10.0.75.119/32	10.0.75.119 – 10.0.75.119	10.0.75.119
121	10.0.75.120/32	10.0.75.120 – 10.0.75.120	10.0.75.120
122	10.0.75.121/32	10.0.75.121 – 10.0.75.121	10.0.75.121
123	10.0.75.122/32	10.0.75.122 – 10.0.75.122	10.0.75.122
124	10.0.75.123/32	10.0.75.123 – 10.0.75.123	10.0.75.123
125	10.0.75.124/32	10.0.75.124 – 10.0.75.124	10.0.75.124
126	10.0.75.125/32	10.0.75.125 – 10.0.75.125	10.0.75.125
127	10.0.75.126/32	10.0.75.126 – 10.0.75.126	10.0.75.126
128	10.0.75.127/32	10.0.75.127 – 10.0.75.127	10.0.75.127
129	10.0.75.128/32	10.0.75.128 – 10.0.75.128	10.0.75.128
130	10.0.75.129/32	10.0.75.129 – 10.0.75.129	10.0.75.129
131	10.0.75.130/32	10.0.75.130 – 10.0.75.130	10.0.75.130
132	10.0.75.131/32	10.0.75.131 – 10.0.75.131	10.0.75.131
133	10.0.75.132/32	10.0.75.132 – 10.0.75.132	10.0.75.132
134	10.0.75.133/32	10.0.75.133 – 10.0.75.133	10.0.75.133
135	10.0.75.134/32	10.0.75.134 – 10.0.75.134	10.0.75.134
136	10.0.75.135/32	10.0.75.135 – 10.0.75.135	10.0.75.135
137	10.0.75.136/32	10.0.75.136 – 10.0.75.136	10.0.75.136
138	10.0.75.137/32	10.0.75.137 – 10.0.75.137	10.0.75.137
139	10.0.75.138/32	10.0.75.138 – 10.0.75.138	10.0.75.138
140	10.0.75.139/32	10.0.75.139 – 10.0.75.139	10.0.75.139
141	10.0.75.140/32	10.0.75.140 – 10.0.75.140	10.0.75.140
142	10.0.75.141/32	10.0.75.141 – 10.0.75.141	10.0.75.141
143	10.0.75.142/32	10.0.75.142 – 10.0.75.142	10.0.75.142
144	10.0.75.143/32	10.0.75.143 – 10.0.75.143	10.0.75.143
145	10.0.75.144/32	10.0.75.144 – 10.0.75.144	10.0.75.144
146	10.0.75.145/32	10.0.75.145 – 10.0.75.145	10.0.75.145
147	10.0.75.146/32	10.0.75.146 – 10.0.75.146	10.0.75.146
148	10.0.75.147/32	10.0.75.147 – 10.0.75.147	10.0.75.147
149	10.0.75.148/32	10.0.75.148 – 10.0.75.148	10.0.75.148
150	10.0.75.149/32	10.0.75.149 – 10.0.75.149	10.0.75.149
151	10.0.75.150/32	10.0.75.150 – 10.0.75.150	10.0.75.150
152	10.0.75.151/32	10.0.75.151 – 10.0.75.151	10.0.75.151
153	10.0.75.152/32	10.0.75.152 – 10.0.75.152	10.0.75.152
154	10.0.75.153/32	10.0.75.153 – 10.0.75.153	10.0.75.153
155	10.0.75.154/32	10.0.75.154 – 10.0.75.154	10.0.75.154
156	10.0.75.155/32	10.0.75.155 – 10.0.75.155	10.0.75.155
157	10.0.75.156/32	10.0.75.156 – 10.0.75.156	10.0.75.156
158	10.0.75.157/32	10.0.75.157 – 10.0.75.157	10.0.75.157
159	10.0.75.158/32	10.0.75.158 – 10.0.75.158	10.0.75.158
160	10.0.75.159/32	10.0.75.159 – 10.0.75.159	10.0.75.159
161	10.0.75.160/32	10.0.75.160 – 10.0.75.160	10.0.75.160
162	10.0.75.161/32	10.0.75.161 – 10.0.75.161	10.0.75.161
163	10.0.75.162/32	10.0.75.162 – 10.0.75.162	10.0.75.162
164	10.0.75.163/32	10.0.75.163 – 10.0.75.163	10.0.75.163
165	10.0.75.164/32	10.0.75.164 – 10.0.75.164	10.0.75.164
166	10.0.75.165/32	10.0.75.165 – 10.0.75.165	10.0.75.165
167	10.0.75.166/32	10.0.75.166 – 10.0.75.166	10.0.75.166
168	10.0.75.167/32	10.0.75.167 – 10.0.75.167	10.0.75.167
169	10.0.75.168/32	10.0.75.168 – 10.0.75.168	10.0.75.168
170	10.0.75.169/32	10.0.75.169 – 10.0.75.169	10.0.75.169
171	10.0.75.170/32	10.0.75.170 – 10.0.75.170	10.0.75.170
172	10.0.75.171/32	10.0.75.171 – 10.0.75.171	10.0.75.171
173	10.0.75.172/32	10.0.75.172 – 10.0.75.172	10.0.75.172
174	10.0.75.173/32	10.0.75.173 – 10.0.75.173	10.0.75.173
175	10.0.75.174/32	10.0.75.174 – 10.0.75.174	10.0.75.174
176	10.0.75.175/32	10.0.75.175 – 10.0.75.175	10.0.75.175
177	10.0.75.176/32	10.0.75.176 – 10.0.75.176	10.0.75.176
178	10.0.75.177/32	10.0.75.177 – 10.0.75.177	10.0.75.177
179	10.0.75.178/32	10.0.75.178 – 10.0.75.178	10.0.75.178
180	10.0.75.179/32	10.0.75.179 – 10.0.75.179	10.0.75.179
181	10.0.75.180/32	10.0.75.180 – 10.0.75.180	10.0.75.180
182	10.0.75.181/32	10.0.75.181 – 10.0.75.181	10.0.75.181
183	10.0.75.182/32	10.0.75.182 – 10.0.75.182	10.0.75.182
184	10.0.75.183/32	10.0.75.183 – 10.0.75.183	10.0.75.183
185	10.0.75.184/32	10.0.75.184 – 10.0.75.184	10.0.75.184
186	10.0.75.185/32	10.0.75.185 – 10.0.75.185	10.0.75.185
187	10.0.75.186/32	10.0.75.186 – 10.0.75.186	10.0.75.186
188	10.0.75.187/32	10.0.75.187 – 10.0.75.187	10.0.75.187
189	10.0.75.188/32	10.0.75.188 – 10.0.75.188	10.0.75.188
190	10.0.75.189/32	10.0.75.189 – 10.0.75.189	10.0.75.189
191	10.0.75.190/32	10.0.75.190 – 10.0.75.190	10.0.75.190
192	10.0.75.191/32	10.0.75.191 – 10.0.75.191	10.0.75.191
193	10.0.75.192/32	10.0.75.192 – 10.0.75.192	10.0.75.192
194	10.0.75.193/32	10.0.75.193 – 10.0.75.193	10.0.75.193
195	10.0.75.194/32	10.0.75.194 – 10.0.75.194	10.0.75.194
196	10.0.75.195/32	10.0.75.195 – 10.0.75.195	10.0.75.195
197	10.0.75.196/32	10.0.75.196 – 10.0.75.196	10.0.75.196
198	10.0.75.197/32	10.0.75.197 – 10.0.75.197	10.0.75.197
199	10.0.75.198/32	10.0.75.198 – 10.0.75.198	10.0.75.198
200	10.0.75.199/32	10.0.75.199 – 10.0.75.199	10.0.75.199
201	10.0.75.200/32	10.0.75.200 – 10.0.75.200	10.0.75.200
202	10.0.75.201/32	10.0.75.201 – 10.0.75.201	10.0.75.201
203	10.0.75.202/32	10.0.75.202 – 10.0.75.202	10.0.75.202
204	10.0.75.203/32	10.0.75.203 – 10.0.75.203	10.0.75.203
205	10.0.75.204/32	10.0.75.204 – 10.0.75.204	10.0.75.204
206	10.0.75.205/32	10.0.75.205 – 10.0.75.205	10.0.75.205
207	10.0.75.206/32	10.0.75.206 – 10.0.75.206	10.0.75.206
208	10.0.75.207/32	10.0.75.207 – 10.0.75.207	10.0.75.207
209	10.0.75.208/32	10.0.75.208 – 10.0.75.208	10.0.75.208
210	10.0.75.209/32	10.0.75.209 – 10.0.75.209	10.0.75.209
211	10.0.75.210/32	10.0.75.210 – 10.0.75.210	10.0.75.210
212	10.0.75.211/32	10.0.75.211 – 10.0.75.211	10.0.75.211
213	10.0.75.212/32	10.0.75.212 – 10.0.75.212	10.0.75.212
214	10.0.75.213/32	10.0.75.213 – 10.0.75.213	10.0.75.213
215	10.0.75.214/32	10.0.75.214 – 10.0.75.214	10.0.75.214
216	10.0.75.215/32	10.0.75.215 – 10.0.75.215	10.0.75.215
217	10.0.75.216/32	10.0.75.216 – 10.0.75.216	10.0.75.216
218	10.0.75.217/32	10.0.75.217 – 10.0.75.217	10.0.75.217
219	10.0.75.218/32	10.0.75.218 – 10.0.75.218	10.0.75.218
220	10.0.75.219/32	10.0.75.219 – 10.0.75.219	10.0.75.219
221	10.0.75.220/32	10.0.75.220 – 10.0.75.220	10.0.75.220
222	10.0.75.221/32	10.0.75.221 – 10.0.75.221	10.0.75.221
223	10.0.75.222/32	10.0.75.222 – 10.0.75.222	10.0.75.222
224	10.0.75.223/32	10.0.75.223 – 10.0.75.223	10.0.75.223
225	10.0.75.224/32	10.0.75.224 – 10.0.75.224	10.0.75.224
226	10.0.75.225/32	10.0.75.225 – 10.0.75.225	10.0.75.225
227	10.0.75.226/32	10.0.75.226 – 10.0.75.226	10.0.75.226
228	10.0.75.227/32	10.0.75.227 – 10.0.75.227	10.0.75.227
229	10.0.75.228/32	10.0.75.228 – 10.0.75.228	10.0.75.228
230	10.0.75.229/32	10.0.75.229 – 10.0.75.229	10.0.75.229
231	10.0.75.230/32	10.0.75.230 – 10.0.75.230	10.0.75.230
232	10.0.75.231/32	10.0.75.231 – 10.0.75.231	10.0.75.231
233	10.0.75.232/32	10.0.75.232 – 10.0.75.232	10.0.75.232
234	10.0.75.233/32	10.0.75.233 – 10.0.75.233	10.0.75.233
235	10.0.75.234/32	10.0.75.234 – 10.0.75.234	10.0.75.234
236	10.0.75.235/32	10.0.75.235 – 10.0.75.235	10.0.75.235
237	10.0.75.236/32	10.0.75.236 – 10.0.75.236	10.0.75.236
238	10.0.75.237/32	10.0.75.237 – 10.0.75.237	10.0.75.237
239	10.0.75.238/32	10.0.75.238 – 10.0.75.238	10.0.75.238
240	10.0.75.239/32	10.0.75.239 – 10.0.75.239	10.0.75.239
241	10.0.75.240/32	10.0.75.240 – 10.0.75.240	10.0.75.240
242	10.0.75.241/32	10.0.75.241 – 10.0.75.241	10.0.75.241
243	10.0.75.242/32	10.0.75.242 – 10.0.75.242	10.0.75.242
244	10.0.75.243/32	10.0.75.243 – 10.0.75.243	10.0.75.243
245	10.0.75.244/32	10.0.75.244 – 10.0.75.244	10.0.75.244
246	10.0.75.245/32	10.0.75.245 – 10.0.75.245	10.0.75.245
247	10.0.75.246/32	10.0.75.246 – 10.0.75.246	10.0.75.246
248	10.0.75.247/32	10.0.75.247 – 10.0.75.247	10.0.75.247
249	10.0.75.248/32	10.0.75.248 – 10.0.75.248	10.0.75.248
250	10.0.75.249/32	10.0.75.249 – 10.0.75.249	10.0.75.249
251	10.0.75.250/32	10.0.75.250 – 10.0.75.250	10.0.75.250
252	10.0.75.251/32	10.0.75.251 – 10.0.75.251	10.0.75.251
253	10.0.75.252/32	10.0.75.252 – 10.0.75.252	10.0.75.252
254	10.0.75.253/32	10.0.75.253 – 10.0.75.253	10.0.75.253
255	10.0.75.254/32	10.0.75.254 – 10.0.75.254	10.0.75.254
256	10.0.75.255/32	10.0.75.255 – 10.0.75.255	10.0.75.255

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 →