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)10.0.5.0/24

network10.0.5.0/24

broadcast10.0.5.255

first host10.0.5.1

last host10.0.5.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.5.0/24

address00001010.00000000.00000101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.00000101.00000000

broadcast00001010.00000000.00000101.11111111

green = network part, grey = host part

hex0x0a000500

decimal167773440

reverse dns0.5.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:500

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.5.0/32	10.0.5.0 – 10.0.5.0	10.0.5.0
2	10.0.5.1/32	10.0.5.1 – 10.0.5.1	10.0.5.1
3	10.0.5.2/32	10.0.5.2 – 10.0.5.2	10.0.5.2
4	10.0.5.3/32	10.0.5.3 – 10.0.5.3	10.0.5.3
5	10.0.5.4/32	10.0.5.4 – 10.0.5.4	10.0.5.4
6	10.0.5.5/32	10.0.5.5 – 10.0.5.5	10.0.5.5
7	10.0.5.6/32	10.0.5.6 – 10.0.5.6	10.0.5.6
8	10.0.5.7/32	10.0.5.7 – 10.0.5.7	10.0.5.7
9	10.0.5.8/32	10.0.5.8 – 10.0.5.8	10.0.5.8
10	10.0.5.9/32	10.0.5.9 – 10.0.5.9	10.0.5.9
11	10.0.5.10/32	10.0.5.10 – 10.0.5.10	10.0.5.10
12	10.0.5.11/32	10.0.5.11 – 10.0.5.11	10.0.5.11
13	10.0.5.12/32	10.0.5.12 – 10.0.5.12	10.0.5.12
14	10.0.5.13/32	10.0.5.13 – 10.0.5.13	10.0.5.13
15	10.0.5.14/32	10.0.5.14 – 10.0.5.14	10.0.5.14
16	10.0.5.15/32	10.0.5.15 – 10.0.5.15	10.0.5.15
17	10.0.5.16/32	10.0.5.16 – 10.0.5.16	10.0.5.16
18	10.0.5.17/32	10.0.5.17 – 10.0.5.17	10.0.5.17
19	10.0.5.18/32	10.0.5.18 – 10.0.5.18	10.0.5.18
20	10.0.5.19/32	10.0.5.19 – 10.0.5.19	10.0.5.19
21	10.0.5.20/32	10.0.5.20 – 10.0.5.20	10.0.5.20
22	10.0.5.21/32	10.0.5.21 – 10.0.5.21	10.0.5.21
23	10.0.5.22/32	10.0.5.22 – 10.0.5.22	10.0.5.22
24	10.0.5.23/32	10.0.5.23 – 10.0.5.23	10.0.5.23
25	10.0.5.24/32	10.0.5.24 – 10.0.5.24	10.0.5.24
26	10.0.5.25/32	10.0.5.25 – 10.0.5.25	10.0.5.25
27	10.0.5.26/32	10.0.5.26 – 10.0.5.26	10.0.5.26
28	10.0.5.27/32	10.0.5.27 – 10.0.5.27	10.0.5.27
29	10.0.5.28/32	10.0.5.28 – 10.0.5.28	10.0.5.28
30	10.0.5.29/32	10.0.5.29 – 10.0.5.29	10.0.5.29
31	10.0.5.30/32	10.0.5.30 – 10.0.5.30	10.0.5.30
32	10.0.5.31/32	10.0.5.31 – 10.0.5.31	10.0.5.31
33	10.0.5.32/32	10.0.5.32 – 10.0.5.32	10.0.5.32
34	10.0.5.33/32	10.0.5.33 – 10.0.5.33	10.0.5.33
35	10.0.5.34/32	10.0.5.34 – 10.0.5.34	10.0.5.34
36	10.0.5.35/32	10.0.5.35 – 10.0.5.35	10.0.5.35
37	10.0.5.36/32	10.0.5.36 – 10.0.5.36	10.0.5.36
38	10.0.5.37/32	10.0.5.37 – 10.0.5.37	10.0.5.37
39	10.0.5.38/32	10.0.5.38 – 10.0.5.38	10.0.5.38
40	10.0.5.39/32	10.0.5.39 – 10.0.5.39	10.0.5.39
41	10.0.5.40/32	10.0.5.40 – 10.0.5.40	10.0.5.40
42	10.0.5.41/32	10.0.5.41 – 10.0.5.41	10.0.5.41
43	10.0.5.42/32	10.0.5.42 – 10.0.5.42	10.0.5.42
44	10.0.5.43/32	10.0.5.43 – 10.0.5.43	10.0.5.43
45	10.0.5.44/32	10.0.5.44 – 10.0.5.44	10.0.5.44
46	10.0.5.45/32	10.0.5.45 – 10.0.5.45	10.0.5.45
47	10.0.5.46/32	10.0.5.46 – 10.0.5.46	10.0.5.46
48	10.0.5.47/32	10.0.5.47 – 10.0.5.47	10.0.5.47
49	10.0.5.48/32	10.0.5.48 – 10.0.5.48	10.0.5.48
50	10.0.5.49/32	10.0.5.49 – 10.0.5.49	10.0.5.49
51	10.0.5.50/32	10.0.5.50 – 10.0.5.50	10.0.5.50
52	10.0.5.51/32	10.0.5.51 – 10.0.5.51	10.0.5.51
53	10.0.5.52/32	10.0.5.52 – 10.0.5.52	10.0.5.52
54	10.0.5.53/32	10.0.5.53 – 10.0.5.53	10.0.5.53
55	10.0.5.54/32	10.0.5.54 – 10.0.5.54	10.0.5.54
56	10.0.5.55/32	10.0.5.55 – 10.0.5.55	10.0.5.55
57	10.0.5.56/32	10.0.5.56 – 10.0.5.56	10.0.5.56
58	10.0.5.57/32	10.0.5.57 – 10.0.5.57	10.0.5.57
59	10.0.5.58/32	10.0.5.58 – 10.0.5.58	10.0.5.58
60	10.0.5.59/32	10.0.5.59 – 10.0.5.59	10.0.5.59
61	10.0.5.60/32	10.0.5.60 – 10.0.5.60	10.0.5.60
62	10.0.5.61/32	10.0.5.61 – 10.0.5.61	10.0.5.61
63	10.0.5.62/32	10.0.5.62 – 10.0.5.62	10.0.5.62
64	10.0.5.63/32	10.0.5.63 – 10.0.5.63	10.0.5.63
65	10.0.5.64/32	10.0.5.64 – 10.0.5.64	10.0.5.64
66	10.0.5.65/32	10.0.5.65 – 10.0.5.65	10.0.5.65
67	10.0.5.66/32	10.0.5.66 – 10.0.5.66	10.0.5.66
68	10.0.5.67/32	10.0.5.67 – 10.0.5.67	10.0.5.67
69	10.0.5.68/32	10.0.5.68 – 10.0.5.68	10.0.5.68
70	10.0.5.69/32	10.0.5.69 – 10.0.5.69	10.0.5.69
71	10.0.5.70/32	10.0.5.70 – 10.0.5.70	10.0.5.70
72	10.0.5.71/32	10.0.5.71 – 10.0.5.71	10.0.5.71
73	10.0.5.72/32	10.0.5.72 – 10.0.5.72	10.0.5.72
74	10.0.5.73/32	10.0.5.73 – 10.0.5.73	10.0.5.73
75	10.0.5.74/32	10.0.5.74 – 10.0.5.74	10.0.5.74
76	10.0.5.75/32	10.0.5.75 – 10.0.5.75	10.0.5.75
77	10.0.5.76/32	10.0.5.76 – 10.0.5.76	10.0.5.76
78	10.0.5.77/32	10.0.5.77 – 10.0.5.77	10.0.5.77
79	10.0.5.78/32	10.0.5.78 – 10.0.5.78	10.0.5.78
80	10.0.5.79/32	10.0.5.79 – 10.0.5.79	10.0.5.79
81	10.0.5.80/32	10.0.5.80 – 10.0.5.80	10.0.5.80
82	10.0.5.81/32	10.0.5.81 – 10.0.5.81	10.0.5.81
83	10.0.5.82/32	10.0.5.82 – 10.0.5.82	10.0.5.82
84	10.0.5.83/32	10.0.5.83 – 10.0.5.83	10.0.5.83
85	10.0.5.84/32	10.0.5.84 – 10.0.5.84	10.0.5.84
86	10.0.5.85/32	10.0.5.85 – 10.0.5.85	10.0.5.85
87	10.0.5.86/32	10.0.5.86 – 10.0.5.86	10.0.5.86
88	10.0.5.87/32	10.0.5.87 – 10.0.5.87	10.0.5.87
89	10.0.5.88/32	10.0.5.88 – 10.0.5.88	10.0.5.88
90	10.0.5.89/32	10.0.5.89 – 10.0.5.89	10.0.5.89
91	10.0.5.90/32	10.0.5.90 – 10.0.5.90	10.0.5.90
92	10.0.5.91/32	10.0.5.91 – 10.0.5.91	10.0.5.91
93	10.0.5.92/32	10.0.5.92 – 10.0.5.92	10.0.5.92
94	10.0.5.93/32	10.0.5.93 – 10.0.5.93	10.0.5.93
95	10.0.5.94/32	10.0.5.94 – 10.0.5.94	10.0.5.94
96	10.0.5.95/32	10.0.5.95 – 10.0.5.95	10.0.5.95
97	10.0.5.96/32	10.0.5.96 – 10.0.5.96	10.0.5.96
98	10.0.5.97/32	10.0.5.97 – 10.0.5.97	10.0.5.97
99	10.0.5.98/32	10.0.5.98 – 10.0.5.98	10.0.5.98
100	10.0.5.99/32	10.0.5.99 – 10.0.5.99	10.0.5.99
101	10.0.5.100/32	10.0.5.100 – 10.0.5.100	10.0.5.100
102	10.0.5.101/32	10.0.5.101 – 10.0.5.101	10.0.5.101
103	10.0.5.102/32	10.0.5.102 – 10.0.5.102	10.0.5.102
104	10.0.5.103/32	10.0.5.103 – 10.0.5.103	10.0.5.103
105	10.0.5.104/32	10.0.5.104 – 10.0.5.104	10.0.5.104
106	10.0.5.105/32	10.0.5.105 – 10.0.5.105	10.0.5.105
107	10.0.5.106/32	10.0.5.106 – 10.0.5.106	10.0.5.106
108	10.0.5.107/32	10.0.5.107 – 10.0.5.107	10.0.5.107
109	10.0.5.108/32	10.0.5.108 – 10.0.5.108	10.0.5.108
110	10.0.5.109/32	10.0.5.109 – 10.0.5.109	10.0.5.109
111	10.0.5.110/32	10.0.5.110 – 10.0.5.110	10.0.5.110
112	10.0.5.111/32	10.0.5.111 – 10.0.5.111	10.0.5.111
113	10.0.5.112/32	10.0.5.112 – 10.0.5.112	10.0.5.112
114	10.0.5.113/32	10.0.5.113 – 10.0.5.113	10.0.5.113
115	10.0.5.114/32	10.0.5.114 – 10.0.5.114	10.0.5.114
116	10.0.5.115/32	10.0.5.115 – 10.0.5.115	10.0.5.115
117	10.0.5.116/32	10.0.5.116 – 10.0.5.116	10.0.5.116
118	10.0.5.117/32	10.0.5.117 – 10.0.5.117	10.0.5.117
119	10.0.5.118/32	10.0.5.118 – 10.0.5.118	10.0.5.118
120	10.0.5.119/32	10.0.5.119 – 10.0.5.119	10.0.5.119
121	10.0.5.120/32	10.0.5.120 – 10.0.5.120	10.0.5.120
122	10.0.5.121/32	10.0.5.121 – 10.0.5.121	10.0.5.121
123	10.0.5.122/32	10.0.5.122 – 10.0.5.122	10.0.5.122
124	10.0.5.123/32	10.0.5.123 – 10.0.5.123	10.0.5.123
125	10.0.5.124/32	10.0.5.124 – 10.0.5.124	10.0.5.124
126	10.0.5.125/32	10.0.5.125 – 10.0.5.125	10.0.5.125
127	10.0.5.126/32	10.0.5.126 – 10.0.5.126	10.0.5.126
128	10.0.5.127/32	10.0.5.127 – 10.0.5.127	10.0.5.127
129	10.0.5.128/32	10.0.5.128 – 10.0.5.128	10.0.5.128
130	10.0.5.129/32	10.0.5.129 – 10.0.5.129	10.0.5.129
131	10.0.5.130/32	10.0.5.130 – 10.0.5.130	10.0.5.130
132	10.0.5.131/32	10.0.5.131 – 10.0.5.131	10.0.5.131
133	10.0.5.132/32	10.0.5.132 – 10.0.5.132	10.0.5.132
134	10.0.5.133/32	10.0.5.133 – 10.0.5.133	10.0.5.133
135	10.0.5.134/32	10.0.5.134 – 10.0.5.134	10.0.5.134
136	10.0.5.135/32	10.0.5.135 – 10.0.5.135	10.0.5.135
137	10.0.5.136/32	10.0.5.136 – 10.0.5.136	10.0.5.136
138	10.0.5.137/32	10.0.5.137 – 10.0.5.137	10.0.5.137
139	10.0.5.138/32	10.0.5.138 – 10.0.5.138	10.0.5.138
140	10.0.5.139/32	10.0.5.139 – 10.0.5.139	10.0.5.139
141	10.0.5.140/32	10.0.5.140 – 10.0.5.140	10.0.5.140
142	10.0.5.141/32	10.0.5.141 – 10.0.5.141	10.0.5.141
143	10.0.5.142/32	10.0.5.142 – 10.0.5.142	10.0.5.142
144	10.0.5.143/32	10.0.5.143 – 10.0.5.143	10.0.5.143
145	10.0.5.144/32	10.0.5.144 – 10.0.5.144	10.0.5.144
146	10.0.5.145/32	10.0.5.145 – 10.0.5.145	10.0.5.145
147	10.0.5.146/32	10.0.5.146 – 10.0.5.146	10.0.5.146
148	10.0.5.147/32	10.0.5.147 – 10.0.5.147	10.0.5.147
149	10.0.5.148/32	10.0.5.148 – 10.0.5.148	10.0.5.148
150	10.0.5.149/32	10.0.5.149 – 10.0.5.149	10.0.5.149
151	10.0.5.150/32	10.0.5.150 – 10.0.5.150	10.0.5.150
152	10.0.5.151/32	10.0.5.151 – 10.0.5.151	10.0.5.151
153	10.0.5.152/32	10.0.5.152 – 10.0.5.152	10.0.5.152
154	10.0.5.153/32	10.0.5.153 – 10.0.5.153	10.0.5.153
155	10.0.5.154/32	10.0.5.154 – 10.0.5.154	10.0.5.154
156	10.0.5.155/32	10.0.5.155 – 10.0.5.155	10.0.5.155
157	10.0.5.156/32	10.0.5.156 – 10.0.5.156	10.0.5.156
158	10.0.5.157/32	10.0.5.157 – 10.0.5.157	10.0.5.157
159	10.0.5.158/32	10.0.5.158 – 10.0.5.158	10.0.5.158
160	10.0.5.159/32	10.0.5.159 – 10.0.5.159	10.0.5.159
161	10.0.5.160/32	10.0.5.160 – 10.0.5.160	10.0.5.160
162	10.0.5.161/32	10.0.5.161 – 10.0.5.161	10.0.5.161
163	10.0.5.162/32	10.0.5.162 – 10.0.5.162	10.0.5.162
164	10.0.5.163/32	10.0.5.163 – 10.0.5.163	10.0.5.163
165	10.0.5.164/32	10.0.5.164 – 10.0.5.164	10.0.5.164
166	10.0.5.165/32	10.0.5.165 – 10.0.5.165	10.0.5.165
167	10.0.5.166/32	10.0.5.166 – 10.0.5.166	10.0.5.166
168	10.0.5.167/32	10.0.5.167 – 10.0.5.167	10.0.5.167
169	10.0.5.168/32	10.0.5.168 – 10.0.5.168	10.0.5.168
170	10.0.5.169/32	10.0.5.169 – 10.0.5.169	10.0.5.169
171	10.0.5.170/32	10.0.5.170 – 10.0.5.170	10.0.5.170
172	10.0.5.171/32	10.0.5.171 – 10.0.5.171	10.0.5.171
173	10.0.5.172/32	10.0.5.172 – 10.0.5.172	10.0.5.172
174	10.0.5.173/32	10.0.5.173 – 10.0.5.173	10.0.5.173
175	10.0.5.174/32	10.0.5.174 – 10.0.5.174	10.0.5.174
176	10.0.5.175/32	10.0.5.175 – 10.0.5.175	10.0.5.175
177	10.0.5.176/32	10.0.5.176 – 10.0.5.176	10.0.5.176
178	10.0.5.177/32	10.0.5.177 – 10.0.5.177	10.0.5.177
179	10.0.5.178/32	10.0.5.178 – 10.0.5.178	10.0.5.178
180	10.0.5.179/32	10.0.5.179 – 10.0.5.179	10.0.5.179
181	10.0.5.180/32	10.0.5.180 – 10.0.5.180	10.0.5.180
182	10.0.5.181/32	10.0.5.181 – 10.0.5.181	10.0.5.181
183	10.0.5.182/32	10.0.5.182 – 10.0.5.182	10.0.5.182
184	10.0.5.183/32	10.0.5.183 – 10.0.5.183	10.0.5.183
185	10.0.5.184/32	10.0.5.184 – 10.0.5.184	10.0.5.184
186	10.0.5.185/32	10.0.5.185 – 10.0.5.185	10.0.5.185
187	10.0.5.186/32	10.0.5.186 – 10.0.5.186	10.0.5.186
188	10.0.5.187/32	10.0.5.187 – 10.0.5.187	10.0.5.187
189	10.0.5.188/32	10.0.5.188 – 10.0.5.188	10.0.5.188
190	10.0.5.189/32	10.0.5.189 – 10.0.5.189	10.0.5.189
191	10.0.5.190/32	10.0.5.190 – 10.0.5.190	10.0.5.190
192	10.0.5.191/32	10.0.5.191 – 10.0.5.191	10.0.5.191
193	10.0.5.192/32	10.0.5.192 – 10.0.5.192	10.0.5.192
194	10.0.5.193/32	10.0.5.193 – 10.0.5.193	10.0.5.193
195	10.0.5.194/32	10.0.5.194 – 10.0.5.194	10.0.5.194
196	10.0.5.195/32	10.0.5.195 – 10.0.5.195	10.0.5.195
197	10.0.5.196/32	10.0.5.196 – 10.0.5.196	10.0.5.196
198	10.0.5.197/32	10.0.5.197 – 10.0.5.197	10.0.5.197
199	10.0.5.198/32	10.0.5.198 – 10.0.5.198	10.0.5.198
200	10.0.5.199/32	10.0.5.199 – 10.0.5.199	10.0.5.199
201	10.0.5.200/32	10.0.5.200 – 10.0.5.200	10.0.5.200
202	10.0.5.201/32	10.0.5.201 – 10.0.5.201	10.0.5.201
203	10.0.5.202/32	10.0.5.202 – 10.0.5.202	10.0.5.202
204	10.0.5.203/32	10.0.5.203 – 10.0.5.203	10.0.5.203
205	10.0.5.204/32	10.0.5.204 – 10.0.5.204	10.0.5.204
206	10.0.5.205/32	10.0.5.205 – 10.0.5.205	10.0.5.205
207	10.0.5.206/32	10.0.5.206 – 10.0.5.206	10.0.5.206
208	10.0.5.207/32	10.0.5.207 – 10.0.5.207	10.0.5.207
209	10.0.5.208/32	10.0.5.208 – 10.0.5.208	10.0.5.208
210	10.0.5.209/32	10.0.5.209 – 10.0.5.209	10.0.5.209
211	10.0.5.210/32	10.0.5.210 – 10.0.5.210	10.0.5.210
212	10.0.5.211/32	10.0.5.211 – 10.0.5.211	10.0.5.211
213	10.0.5.212/32	10.0.5.212 – 10.0.5.212	10.0.5.212
214	10.0.5.213/32	10.0.5.213 – 10.0.5.213	10.0.5.213
215	10.0.5.214/32	10.0.5.214 – 10.0.5.214	10.0.5.214
216	10.0.5.215/32	10.0.5.215 – 10.0.5.215	10.0.5.215
217	10.0.5.216/32	10.0.5.216 – 10.0.5.216	10.0.5.216
218	10.0.5.217/32	10.0.5.217 – 10.0.5.217	10.0.5.217
219	10.0.5.218/32	10.0.5.218 – 10.0.5.218	10.0.5.218
220	10.0.5.219/32	10.0.5.219 – 10.0.5.219	10.0.5.219
221	10.0.5.220/32	10.0.5.220 – 10.0.5.220	10.0.5.220
222	10.0.5.221/32	10.0.5.221 – 10.0.5.221	10.0.5.221
223	10.0.5.222/32	10.0.5.222 – 10.0.5.222	10.0.5.222
224	10.0.5.223/32	10.0.5.223 – 10.0.5.223	10.0.5.223
225	10.0.5.224/32	10.0.5.224 – 10.0.5.224	10.0.5.224
226	10.0.5.225/32	10.0.5.225 – 10.0.5.225	10.0.5.225
227	10.0.5.226/32	10.0.5.226 – 10.0.5.226	10.0.5.226
228	10.0.5.227/32	10.0.5.227 – 10.0.5.227	10.0.5.227
229	10.0.5.228/32	10.0.5.228 – 10.0.5.228	10.0.5.228
230	10.0.5.229/32	10.0.5.229 – 10.0.5.229	10.0.5.229
231	10.0.5.230/32	10.0.5.230 – 10.0.5.230	10.0.5.230
232	10.0.5.231/32	10.0.5.231 – 10.0.5.231	10.0.5.231
233	10.0.5.232/32	10.0.5.232 – 10.0.5.232	10.0.5.232
234	10.0.5.233/32	10.0.5.233 – 10.0.5.233	10.0.5.233
235	10.0.5.234/32	10.0.5.234 – 10.0.5.234	10.0.5.234
236	10.0.5.235/32	10.0.5.235 – 10.0.5.235	10.0.5.235
237	10.0.5.236/32	10.0.5.236 – 10.0.5.236	10.0.5.236
238	10.0.5.237/32	10.0.5.237 – 10.0.5.237	10.0.5.237
239	10.0.5.238/32	10.0.5.238 – 10.0.5.238	10.0.5.238
240	10.0.5.239/32	10.0.5.239 – 10.0.5.239	10.0.5.239
241	10.0.5.240/32	10.0.5.240 – 10.0.5.240	10.0.5.240
242	10.0.5.241/32	10.0.5.241 – 10.0.5.241	10.0.5.241
243	10.0.5.242/32	10.0.5.242 – 10.0.5.242	10.0.5.242
244	10.0.5.243/32	10.0.5.243 – 10.0.5.243	10.0.5.243
245	10.0.5.244/32	10.0.5.244 – 10.0.5.244	10.0.5.244
246	10.0.5.245/32	10.0.5.245 – 10.0.5.245	10.0.5.245
247	10.0.5.246/32	10.0.5.246 – 10.0.5.246	10.0.5.246
248	10.0.5.247/32	10.0.5.247 – 10.0.5.247	10.0.5.247
249	10.0.5.248/32	10.0.5.248 – 10.0.5.248	10.0.5.248
250	10.0.5.249/32	10.0.5.249 – 10.0.5.249	10.0.5.249
251	10.0.5.250/32	10.0.5.250 – 10.0.5.250	10.0.5.250
252	10.0.5.251/32	10.0.5.251 – 10.0.5.251	10.0.5.251
253	10.0.5.252/32	10.0.5.252 – 10.0.5.252	10.0.5.252
254	10.0.5.253/32	10.0.5.253 – 10.0.5.253	10.0.5.253
255	10.0.5.254/32	10.0.5.254 – 10.0.5.254	10.0.5.254
256	10.0.5.255/32	10.0.5.255 – 10.0.5.255	10.0.5.255

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 →