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)192.168.1.10/24

network192.168.1.0/24

broadcast192.168.1.255

first host192.168.1.1

last host192.168.1.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classC

ipcalc 192.168.1.10/24

address11000000.10101000.00000001.00001010

subnet mask11111111.11111111.11111111.00000000

network11000000.10101000.00000001.00000000

broadcast11000000.10101000.00000001.11111111

green = network part, grey = host part

hex0xc0a8010a

decimal3232235786

reverse dns10.1.168.192.in-addr.arpa

ipv4-mapped::ffff:c0a8:10a

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	192.168.1.0/32	192.168.1.0 – 192.168.1.0	192.168.1.0
2	192.168.1.1/32	192.168.1.1 – 192.168.1.1	192.168.1.1
3	192.168.1.2/32	192.168.1.2 – 192.168.1.2	192.168.1.2
4	192.168.1.3/32	192.168.1.3 – 192.168.1.3	192.168.1.3
5	192.168.1.4/32	192.168.1.4 – 192.168.1.4	192.168.1.4
6	192.168.1.5/32	192.168.1.5 – 192.168.1.5	192.168.1.5
7	192.168.1.6/32	192.168.1.6 – 192.168.1.6	192.168.1.6
8	192.168.1.7/32	192.168.1.7 – 192.168.1.7	192.168.1.7
9	192.168.1.8/32	192.168.1.8 – 192.168.1.8	192.168.1.8
10	192.168.1.9/32	192.168.1.9 – 192.168.1.9	192.168.1.9
11	192.168.1.10/32	192.168.1.10 – 192.168.1.10	192.168.1.10
12	192.168.1.11/32	192.168.1.11 – 192.168.1.11	192.168.1.11
13	192.168.1.12/32	192.168.1.12 – 192.168.1.12	192.168.1.12
14	192.168.1.13/32	192.168.1.13 – 192.168.1.13	192.168.1.13
15	192.168.1.14/32	192.168.1.14 – 192.168.1.14	192.168.1.14
16	192.168.1.15/32	192.168.1.15 – 192.168.1.15	192.168.1.15
17	192.168.1.16/32	192.168.1.16 – 192.168.1.16	192.168.1.16
18	192.168.1.17/32	192.168.1.17 – 192.168.1.17	192.168.1.17
19	192.168.1.18/32	192.168.1.18 – 192.168.1.18	192.168.1.18
20	192.168.1.19/32	192.168.1.19 – 192.168.1.19	192.168.1.19
21	192.168.1.20/32	192.168.1.20 – 192.168.1.20	192.168.1.20
22	192.168.1.21/32	192.168.1.21 – 192.168.1.21	192.168.1.21
23	192.168.1.22/32	192.168.1.22 – 192.168.1.22	192.168.1.22
24	192.168.1.23/32	192.168.1.23 – 192.168.1.23	192.168.1.23
25	192.168.1.24/32	192.168.1.24 – 192.168.1.24	192.168.1.24
26	192.168.1.25/32	192.168.1.25 – 192.168.1.25	192.168.1.25
27	192.168.1.26/32	192.168.1.26 – 192.168.1.26	192.168.1.26
28	192.168.1.27/32	192.168.1.27 – 192.168.1.27	192.168.1.27
29	192.168.1.28/32	192.168.1.28 – 192.168.1.28	192.168.1.28
30	192.168.1.29/32	192.168.1.29 – 192.168.1.29	192.168.1.29
31	192.168.1.30/32	192.168.1.30 – 192.168.1.30	192.168.1.30
32	192.168.1.31/32	192.168.1.31 – 192.168.1.31	192.168.1.31
33	192.168.1.32/32	192.168.1.32 – 192.168.1.32	192.168.1.32
34	192.168.1.33/32	192.168.1.33 – 192.168.1.33	192.168.1.33
35	192.168.1.34/32	192.168.1.34 – 192.168.1.34	192.168.1.34
36	192.168.1.35/32	192.168.1.35 – 192.168.1.35	192.168.1.35
37	192.168.1.36/32	192.168.1.36 – 192.168.1.36	192.168.1.36
38	192.168.1.37/32	192.168.1.37 – 192.168.1.37	192.168.1.37
39	192.168.1.38/32	192.168.1.38 – 192.168.1.38	192.168.1.38
40	192.168.1.39/32	192.168.1.39 – 192.168.1.39	192.168.1.39
41	192.168.1.40/32	192.168.1.40 – 192.168.1.40	192.168.1.40
42	192.168.1.41/32	192.168.1.41 – 192.168.1.41	192.168.1.41
43	192.168.1.42/32	192.168.1.42 – 192.168.1.42	192.168.1.42
44	192.168.1.43/32	192.168.1.43 – 192.168.1.43	192.168.1.43
45	192.168.1.44/32	192.168.1.44 – 192.168.1.44	192.168.1.44
46	192.168.1.45/32	192.168.1.45 – 192.168.1.45	192.168.1.45
47	192.168.1.46/32	192.168.1.46 – 192.168.1.46	192.168.1.46
48	192.168.1.47/32	192.168.1.47 – 192.168.1.47	192.168.1.47
49	192.168.1.48/32	192.168.1.48 – 192.168.1.48	192.168.1.48
50	192.168.1.49/32	192.168.1.49 – 192.168.1.49	192.168.1.49
51	192.168.1.50/32	192.168.1.50 – 192.168.1.50	192.168.1.50
52	192.168.1.51/32	192.168.1.51 – 192.168.1.51	192.168.1.51
53	192.168.1.52/32	192.168.1.52 – 192.168.1.52	192.168.1.52
54	192.168.1.53/32	192.168.1.53 – 192.168.1.53	192.168.1.53
55	192.168.1.54/32	192.168.1.54 – 192.168.1.54	192.168.1.54
56	192.168.1.55/32	192.168.1.55 – 192.168.1.55	192.168.1.55
57	192.168.1.56/32	192.168.1.56 – 192.168.1.56	192.168.1.56
58	192.168.1.57/32	192.168.1.57 – 192.168.1.57	192.168.1.57
59	192.168.1.58/32	192.168.1.58 – 192.168.1.58	192.168.1.58
60	192.168.1.59/32	192.168.1.59 – 192.168.1.59	192.168.1.59
61	192.168.1.60/32	192.168.1.60 – 192.168.1.60	192.168.1.60
62	192.168.1.61/32	192.168.1.61 – 192.168.1.61	192.168.1.61
63	192.168.1.62/32	192.168.1.62 – 192.168.1.62	192.168.1.62
64	192.168.1.63/32	192.168.1.63 – 192.168.1.63	192.168.1.63
65	192.168.1.64/32	192.168.1.64 – 192.168.1.64	192.168.1.64
66	192.168.1.65/32	192.168.1.65 – 192.168.1.65	192.168.1.65
67	192.168.1.66/32	192.168.1.66 – 192.168.1.66	192.168.1.66
68	192.168.1.67/32	192.168.1.67 – 192.168.1.67	192.168.1.67
69	192.168.1.68/32	192.168.1.68 – 192.168.1.68	192.168.1.68
70	192.168.1.69/32	192.168.1.69 – 192.168.1.69	192.168.1.69
71	192.168.1.70/32	192.168.1.70 – 192.168.1.70	192.168.1.70
72	192.168.1.71/32	192.168.1.71 – 192.168.1.71	192.168.1.71
73	192.168.1.72/32	192.168.1.72 – 192.168.1.72	192.168.1.72
74	192.168.1.73/32	192.168.1.73 – 192.168.1.73	192.168.1.73
75	192.168.1.74/32	192.168.1.74 – 192.168.1.74	192.168.1.74
76	192.168.1.75/32	192.168.1.75 – 192.168.1.75	192.168.1.75
77	192.168.1.76/32	192.168.1.76 – 192.168.1.76	192.168.1.76
78	192.168.1.77/32	192.168.1.77 – 192.168.1.77	192.168.1.77
79	192.168.1.78/32	192.168.1.78 – 192.168.1.78	192.168.1.78
80	192.168.1.79/32	192.168.1.79 – 192.168.1.79	192.168.1.79
81	192.168.1.80/32	192.168.1.80 – 192.168.1.80	192.168.1.80
82	192.168.1.81/32	192.168.1.81 – 192.168.1.81	192.168.1.81
83	192.168.1.82/32	192.168.1.82 – 192.168.1.82	192.168.1.82
84	192.168.1.83/32	192.168.1.83 – 192.168.1.83	192.168.1.83
85	192.168.1.84/32	192.168.1.84 – 192.168.1.84	192.168.1.84
86	192.168.1.85/32	192.168.1.85 – 192.168.1.85	192.168.1.85
87	192.168.1.86/32	192.168.1.86 – 192.168.1.86	192.168.1.86
88	192.168.1.87/32	192.168.1.87 – 192.168.1.87	192.168.1.87
89	192.168.1.88/32	192.168.1.88 – 192.168.1.88	192.168.1.88
90	192.168.1.89/32	192.168.1.89 – 192.168.1.89	192.168.1.89
91	192.168.1.90/32	192.168.1.90 – 192.168.1.90	192.168.1.90
92	192.168.1.91/32	192.168.1.91 – 192.168.1.91	192.168.1.91
93	192.168.1.92/32	192.168.1.92 – 192.168.1.92	192.168.1.92
94	192.168.1.93/32	192.168.1.93 – 192.168.1.93	192.168.1.93
95	192.168.1.94/32	192.168.1.94 – 192.168.1.94	192.168.1.94
96	192.168.1.95/32	192.168.1.95 – 192.168.1.95	192.168.1.95
97	192.168.1.96/32	192.168.1.96 – 192.168.1.96	192.168.1.96
98	192.168.1.97/32	192.168.1.97 – 192.168.1.97	192.168.1.97
99	192.168.1.98/32	192.168.1.98 – 192.168.1.98	192.168.1.98
100	192.168.1.99/32	192.168.1.99 – 192.168.1.99	192.168.1.99
101	192.168.1.100/32	192.168.1.100 – 192.168.1.100	192.168.1.100
102	192.168.1.101/32	192.168.1.101 – 192.168.1.101	192.168.1.101
103	192.168.1.102/32	192.168.1.102 – 192.168.1.102	192.168.1.102
104	192.168.1.103/32	192.168.1.103 – 192.168.1.103	192.168.1.103
105	192.168.1.104/32	192.168.1.104 – 192.168.1.104	192.168.1.104
106	192.168.1.105/32	192.168.1.105 – 192.168.1.105	192.168.1.105
107	192.168.1.106/32	192.168.1.106 – 192.168.1.106	192.168.1.106
108	192.168.1.107/32	192.168.1.107 – 192.168.1.107	192.168.1.107
109	192.168.1.108/32	192.168.1.108 – 192.168.1.108	192.168.1.108
110	192.168.1.109/32	192.168.1.109 – 192.168.1.109	192.168.1.109
111	192.168.1.110/32	192.168.1.110 – 192.168.1.110	192.168.1.110
112	192.168.1.111/32	192.168.1.111 – 192.168.1.111	192.168.1.111
113	192.168.1.112/32	192.168.1.112 – 192.168.1.112	192.168.1.112
114	192.168.1.113/32	192.168.1.113 – 192.168.1.113	192.168.1.113
115	192.168.1.114/32	192.168.1.114 – 192.168.1.114	192.168.1.114
116	192.168.1.115/32	192.168.1.115 – 192.168.1.115	192.168.1.115
117	192.168.1.116/32	192.168.1.116 – 192.168.1.116	192.168.1.116
118	192.168.1.117/32	192.168.1.117 – 192.168.1.117	192.168.1.117
119	192.168.1.118/32	192.168.1.118 – 192.168.1.118	192.168.1.118
120	192.168.1.119/32	192.168.1.119 – 192.168.1.119	192.168.1.119
121	192.168.1.120/32	192.168.1.120 – 192.168.1.120	192.168.1.120
122	192.168.1.121/32	192.168.1.121 – 192.168.1.121	192.168.1.121
123	192.168.1.122/32	192.168.1.122 – 192.168.1.122	192.168.1.122
124	192.168.1.123/32	192.168.1.123 – 192.168.1.123	192.168.1.123
125	192.168.1.124/32	192.168.1.124 – 192.168.1.124	192.168.1.124
126	192.168.1.125/32	192.168.1.125 – 192.168.1.125	192.168.1.125
127	192.168.1.126/32	192.168.1.126 – 192.168.1.126	192.168.1.126
128	192.168.1.127/32	192.168.1.127 – 192.168.1.127	192.168.1.127
129	192.168.1.128/32	192.168.1.128 – 192.168.1.128	192.168.1.128
130	192.168.1.129/32	192.168.1.129 – 192.168.1.129	192.168.1.129
131	192.168.1.130/32	192.168.1.130 – 192.168.1.130	192.168.1.130
132	192.168.1.131/32	192.168.1.131 – 192.168.1.131	192.168.1.131
133	192.168.1.132/32	192.168.1.132 – 192.168.1.132	192.168.1.132
134	192.168.1.133/32	192.168.1.133 – 192.168.1.133	192.168.1.133
135	192.168.1.134/32	192.168.1.134 – 192.168.1.134	192.168.1.134
136	192.168.1.135/32	192.168.1.135 – 192.168.1.135	192.168.1.135
137	192.168.1.136/32	192.168.1.136 – 192.168.1.136	192.168.1.136
138	192.168.1.137/32	192.168.1.137 – 192.168.1.137	192.168.1.137
139	192.168.1.138/32	192.168.1.138 – 192.168.1.138	192.168.1.138
140	192.168.1.139/32	192.168.1.139 – 192.168.1.139	192.168.1.139
141	192.168.1.140/32	192.168.1.140 – 192.168.1.140	192.168.1.140
142	192.168.1.141/32	192.168.1.141 – 192.168.1.141	192.168.1.141
143	192.168.1.142/32	192.168.1.142 – 192.168.1.142	192.168.1.142
144	192.168.1.143/32	192.168.1.143 – 192.168.1.143	192.168.1.143
145	192.168.1.144/32	192.168.1.144 – 192.168.1.144	192.168.1.144
146	192.168.1.145/32	192.168.1.145 – 192.168.1.145	192.168.1.145
147	192.168.1.146/32	192.168.1.146 – 192.168.1.146	192.168.1.146
148	192.168.1.147/32	192.168.1.147 – 192.168.1.147	192.168.1.147
149	192.168.1.148/32	192.168.1.148 – 192.168.1.148	192.168.1.148
150	192.168.1.149/32	192.168.1.149 – 192.168.1.149	192.168.1.149
151	192.168.1.150/32	192.168.1.150 – 192.168.1.150	192.168.1.150
152	192.168.1.151/32	192.168.1.151 – 192.168.1.151	192.168.1.151
153	192.168.1.152/32	192.168.1.152 – 192.168.1.152	192.168.1.152
154	192.168.1.153/32	192.168.1.153 – 192.168.1.153	192.168.1.153
155	192.168.1.154/32	192.168.1.154 – 192.168.1.154	192.168.1.154
156	192.168.1.155/32	192.168.1.155 – 192.168.1.155	192.168.1.155
157	192.168.1.156/32	192.168.1.156 – 192.168.1.156	192.168.1.156
158	192.168.1.157/32	192.168.1.157 – 192.168.1.157	192.168.1.157
159	192.168.1.158/32	192.168.1.158 – 192.168.1.158	192.168.1.158
160	192.168.1.159/32	192.168.1.159 – 192.168.1.159	192.168.1.159
161	192.168.1.160/32	192.168.1.160 – 192.168.1.160	192.168.1.160
162	192.168.1.161/32	192.168.1.161 – 192.168.1.161	192.168.1.161
163	192.168.1.162/32	192.168.1.162 – 192.168.1.162	192.168.1.162
164	192.168.1.163/32	192.168.1.163 – 192.168.1.163	192.168.1.163
165	192.168.1.164/32	192.168.1.164 – 192.168.1.164	192.168.1.164
166	192.168.1.165/32	192.168.1.165 – 192.168.1.165	192.168.1.165
167	192.168.1.166/32	192.168.1.166 – 192.168.1.166	192.168.1.166
168	192.168.1.167/32	192.168.1.167 – 192.168.1.167	192.168.1.167
169	192.168.1.168/32	192.168.1.168 – 192.168.1.168	192.168.1.168
170	192.168.1.169/32	192.168.1.169 – 192.168.1.169	192.168.1.169
171	192.168.1.170/32	192.168.1.170 – 192.168.1.170	192.168.1.170
172	192.168.1.171/32	192.168.1.171 – 192.168.1.171	192.168.1.171
173	192.168.1.172/32	192.168.1.172 – 192.168.1.172	192.168.1.172
174	192.168.1.173/32	192.168.1.173 – 192.168.1.173	192.168.1.173
175	192.168.1.174/32	192.168.1.174 – 192.168.1.174	192.168.1.174
176	192.168.1.175/32	192.168.1.175 – 192.168.1.175	192.168.1.175
177	192.168.1.176/32	192.168.1.176 – 192.168.1.176	192.168.1.176
178	192.168.1.177/32	192.168.1.177 – 192.168.1.177	192.168.1.177
179	192.168.1.178/32	192.168.1.178 – 192.168.1.178	192.168.1.178
180	192.168.1.179/32	192.168.1.179 – 192.168.1.179	192.168.1.179
181	192.168.1.180/32	192.168.1.180 – 192.168.1.180	192.168.1.180
182	192.168.1.181/32	192.168.1.181 – 192.168.1.181	192.168.1.181
183	192.168.1.182/32	192.168.1.182 – 192.168.1.182	192.168.1.182
184	192.168.1.183/32	192.168.1.183 – 192.168.1.183	192.168.1.183
185	192.168.1.184/32	192.168.1.184 – 192.168.1.184	192.168.1.184
186	192.168.1.185/32	192.168.1.185 – 192.168.1.185	192.168.1.185
187	192.168.1.186/32	192.168.1.186 – 192.168.1.186	192.168.1.186
188	192.168.1.187/32	192.168.1.187 – 192.168.1.187	192.168.1.187
189	192.168.1.188/32	192.168.1.188 – 192.168.1.188	192.168.1.188
190	192.168.1.189/32	192.168.1.189 – 192.168.1.189	192.168.1.189
191	192.168.1.190/32	192.168.1.190 – 192.168.1.190	192.168.1.190
192	192.168.1.191/32	192.168.1.191 – 192.168.1.191	192.168.1.191
193	192.168.1.192/32	192.168.1.192 – 192.168.1.192	192.168.1.192
194	192.168.1.193/32	192.168.1.193 – 192.168.1.193	192.168.1.193
195	192.168.1.194/32	192.168.1.194 – 192.168.1.194	192.168.1.194
196	192.168.1.195/32	192.168.1.195 – 192.168.1.195	192.168.1.195
197	192.168.1.196/32	192.168.1.196 – 192.168.1.196	192.168.1.196
198	192.168.1.197/32	192.168.1.197 – 192.168.1.197	192.168.1.197
199	192.168.1.198/32	192.168.1.198 – 192.168.1.198	192.168.1.198
200	192.168.1.199/32	192.168.1.199 – 192.168.1.199	192.168.1.199
201	192.168.1.200/32	192.168.1.200 – 192.168.1.200	192.168.1.200
202	192.168.1.201/32	192.168.1.201 – 192.168.1.201	192.168.1.201
203	192.168.1.202/32	192.168.1.202 – 192.168.1.202	192.168.1.202
204	192.168.1.203/32	192.168.1.203 – 192.168.1.203	192.168.1.203
205	192.168.1.204/32	192.168.1.204 – 192.168.1.204	192.168.1.204
206	192.168.1.205/32	192.168.1.205 – 192.168.1.205	192.168.1.205
207	192.168.1.206/32	192.168.1.206 – 192.168.1.206	192.168.1.206
208	192.168.1.207/32	192.168.1.207 – 192.168.1.207	192.168.1.207
209	192.168.1.208/32	192.168.1.208 – 192.168.1.208	192.168.1.208
210	192.168.1.209/32	192.168.1.209 – 192.168.1.209	192.168.1.209
211	192.168.1.210/32	192.168.1.210 – 192.168.1.210	192.168.1.210
212	192.168.1.211/32	192.168.1.211 – 192.168.1.211	192.168.1.211
213	192.168.1.212/32	192.168.1.212 – 192.168.1.212	192.168.1.212
214	192.168.1.213/32	192.168.1.213 – 192.168.1.213	192.168.1.213
215	192.168.1.214/32	192.168.1.214 – 192.168.1.214	192.168.1.214
216	192.168.1.215/32	192.168.1.215 – 192.168.1.215	192.168.1.215
217	192.168.1.216/32	192.168.1.216 – 192.168.1.216	192.168.1.216
218	192.168.1.217/32	192.168.1.217 – 192.168.1.217	192.168.1.217
219	192.168.1.218/32	192.168.1.218 – 192.168.1.218	192.168.1.218
220	192.168.1.219/32	192.168.1.219 – 192.168.1.219	192.168.1.219
221	192.168.1.220/32	192.168.1.220 – 192.168.1.220	192.168.1.220
222	192.168.1.221/32	192.168.1.221 – 192.168.1.221	192.168.1.221
223	192.168.1.222/32	192.168.1.222 – 192.168.1.222	192.168.1.222
224	192.168.1.223/32	192.168.1.223 – 192.168.1.223	192.168.1.223
225	192.168.1.224/32	192.168.1.224 – 192.168.1.224	192.168.1.224
226	192.168.1.225/32	192.168.1.225 – 192.168.1.225	192.168.1.225
227	192.168.1.226/32	192.168.1.226 – 192.168.1.226	192.168.1.226
228	192.168.1.227/32	192.168.1.227 – 192.168.1.227	192.168.1.227
229	192.168.1.228/32	192.168.1.228 – 192.168.1.228	192.168.1.228
230	192.168.1.229/32	192.168.1.229 – 192.168.1.229	192.168.1.229
231	192.168.1.230/32	192.168.1.230 – 192.168.1.230	192.168.1.230
232	192.168.1.231/32	192.168.1.231 – 192.168.1.231	192.168.1.231
233	192.168.1.232/32	192.168.1.232 – 192.168.1.232	192.168.1.232
234	192.168.1.233/32	192.168.1.233 – 192.168.1.233	192.168.1.233
235	192.168.1.234/32	192.168.1.234 – 192.168.1.234	192.168.1.234
236	192.168.1.235/32	192.168.1.235 – 192.168.1.235	192.168.1.235
237	192.168.1.236/32	192.168.1.236 – 192.168.1.236	192.168.1.236
238	192.168.1.237/32	192.168.1.237 – 192.168.1.237	192.168.1.237
239	192.168.1.238/32	192.168.1.238 – 192.168.1.238	192.168.1.238
240	192.168.1.239/32	192.168.1.239 – 192.168.1.239	192.168.1.239
241	192.168.1.240/32	192.168.1.240 – 192.168.1.240	192.168.1.240
242	192.168.1.241/32	192.168.1.241 – 192.168.1.241	192.168.1.241
243	192.168.1.242/32	192.168.1.242 – 192.168.1.242	192.168.1.242
244	192.168.1.243/32	192.168.1.243 – 192.168.1.243	192.168.1.243
245	192.168.1.244/32	192.168.1.244 – 192.168.1.244	192.168.1.244
246	192.168.1.245/32	192.168.1.245 – 192.168.1.245	192.168.1.245
247	192.168.1.246/32	192.168.1.246 – 192.168.1.246	192.168.1.246
248	192.168.1.247/32	192.168.1.247 – 192.168.1.247	192.168.1.247
249	192.168.1.248/32	192.168.1.248 – 192.168.1.248	192.168.1.248
250	192.168.1.249/32	192.168.1.249 – 192.168.1.249	192.168.1.249
251	192.168.1.250/32	192.168.1.250 – 192.168.1.250	192.168.1.250
252	192.168.1.251/32	192.168.1.251 – 192.168.1.251	192.168.1.251
253	192.168.1.252/32	192.168.1.252 – 192.168.1.252	192.168.1.252
254	192.168.1.253/32	192.168.1.253 – 192.168.1.253	192.168.1.253
255	192.168.1.254/32	192.168.1.254 – 192.168.1.254	192.168.1.254
256	192.168.1.255/32	192.168.1.255 – 192.168.1.255	192.168.1.255

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 →