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)10.76.23.0/24

network10.76.23.0/24

broadcast10.76.23.255

first host10.76.23.1

last host10.76.23.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.76.23.0/24

address00001010.01001100.00010111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001100.00010111.00000000

broadcast00001010.01001100.00010111.11111111

green = network part, grey = host part

hex0x0a4c1700

decimal172758784

reverse dns0.23.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:1700

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.76.23.0/32	10.76.23.0 – 10.76.23.0	10.76.23.0
2	10.76.23.1/32	10.76.23.1 – 10.76.23.1	10.76.23.1
3	10.76.23.2/32	10.76.23.2 – 10.76.23.2	10.76.23.2
4	10.76.23.3/32	10.76.23.3 – 10.76.23.3	10.76.23.3
5	10.76.23.4/32	10.76.23.4 – 10.76.23.4	10.76.23.4
6	10.76.23.5/32	10.76.23.5 – 10.76.23.5	10.76.23.5
7	10.76.23.6/32	10.76.23.6 – 10.76.23.6	10.76.23.6
8	10.76.23.7/32	10.76.23.7 – 10.76.23.7	10.76.23.7
9	10.76.23.8/32	10.76.23.8 – 10.76.23.8	10.76.23.8
10	10.76.23.9/32	10.76.23.9 – 10.76.23.9	10.76.23.9
11	10.76.23.10/32	10.76.23.10 – 10.76.23.10	10.76.23.10
12	10.76.23.11/32	10.76.23.11 – 10.76.23.11	10.76.23.11
13	10.76.23.12/32	10.76.23.12 – 10.76.23.12	10.76.23.12
14	10.76.23.13/32	10.76.23.13 – 10.76.23.13	10.76.23.13
15	10.76.23.14/32	10.76.23.14 – 10.76.23.14	10.76.23.14
16	10.76.23.15/32	10.76.23.15 – 10.76.23.15	10.76.23.15
17	10.76.23.16/32	10.76.23.16 – 10.76.23.16	10.76.23.16
18	10.76.23.17/32	10.76.23.17 – 10.76.23.17	10.76.23.17
19	10.76.23.18/32	10.76.23.18 – 10.76.23.18	10.76.23.18
20	10.76.23.19/32	10.76.23.19 – 10.76.23.19	10.76.23.19
21	10.76.23.20/32	10.76.23.20 – 10.76.23.20	10.76.23.20
22	10.76.23.21/32	10.76.23.21 – 10.76.23.21	10.76.23.21
23	10.76.23.22/32	10.76.23.22 – 10.76.23.22	10.76.23.22
24	10.76.23.23/32	10.76.23.23 – 10.76.23.23	10.76.23.23
25	10.76.23.24/32	10.76.23.24 – 10.76.23.24	10.76.23.24
26	10.76.23.25/32	10.76.23.25 – 10.76.23.25	10.76.23.25
27	10.76.23.26/32	10.76.23.26 – 10.76.23.26	10.76.23.26
28	10.76.23.27/32	10.76.23.27 – 10.76.23.27	10.76.23.27
29	10.76.23.28/32	10.76.23.28 – 10.76.23.28	10.76.23.28
30	10.76.23.29/32	10.76.23.29 – 10.76.23.29	10.76.23.29
31	10.76.23.30/32	10.76.23.30 – 10.76.23.30	10.76.23.30
32	10.76.23.31/32	10.76.23.31 – 10.76.23.31	10.76.23.31
33	10.76.23.32/32	10.76.23.32 – 10.76.23.32	10.76.23.32
34	10.76.23.33/32	10.76.23.33 – 10.76.23.33	10.76.23.33
35	10.76.23.34/32	10.76.23.34 – 10.76.23.34	10.76.23.34
36	10.76.23.35/32	10.76.23.35 – 10.76.23.35	10.76.23.35
37	10.76.23.36/32	10.76.23.36 – 10.76.23.36	10.76.23.36
38	10.76.23.37/32	10.76.23.37 – 10.76.23.37	10.76.23.37
39	10.76.23.38/32	10.76.23.38 – 10.76.23.38	10.76.23.38
40	10.76.23.39/32	10.76.23.39 – 10.76.23.39	10.76.23.39
41	10.76.23.40/32	10.76.23.40 – 10.76.23.40	10.76.23.40
42	10.76.23.41/32	10.76.23.41 – 10.76.23.41	10.76.23.41
43	10.76.23.42/32	10.76.23.42 – 10.76.23.42	10.76.23.42
44	10.76.23.43/32	10.76.23.43 – 10.76.23.43	10.76.23.43
45	10.76.23.44/32	10.76.23.44 – 10.76.23.44	10.76.23.44
46	10.76.23.45/32	10.76.23.45 – 10.76.23.45	10.76.23.45
47	10.76.23.46/32	10.76.23.46 – 10.76.23.46	10.76.23.46
48	10.76.23.47/32	10.76.23.47 – 10.76.23.47	10.76.23.47
49	10.76.23.48/32	10.76.23.48 – 10.76.23.48	10.76.23.48
50	10.76.23.49/32	10.76.23.49 – 10.76.23.49	10.76.23.49
51	10.76.23.50/32	10.76.23.50 – 10.76.23.50	10.76.23.50
52	10.76.23.51/32	10.76.23.51 – 10.76.23.51	10.76.23.51
53	10.76.23.52/32	10.76.23.52 – 10.76.23.52	10.76.23.52
54	10.76.23.53/32	10.76.23.53 – 10.76.23.53	10.76.23.53
55	10.76.23.54/32	10.76.23.54 – 10.76.23.54	10.76.23.54
56	10.76.23.55/32	10.76.23.55 – 10.76.23.55	10.76.23.55
57	10.76.23.56/32	10.76.23.56 – 10.76.23.56	10.76.23.56
58	10.76.23.57/32	10.76.23.57 – 10.76.23.57	10.76.23.57
59	10.76.23.58/32	10.76.23.58 – 10.76.23.58	10.76.23.58
60	10.76.23.59/32	10.76.23.59 – 10.76.23.59	10.76.23.59
61	10.76.23.60/32	10.76.23.60 – 10.76.23.60	10.76.23.60
62	10.76.23.61/32	10.76.23.61 – 10.76.23.61	10.76.23.61
63	10.76.23.62/32	10.76.23.62 – 10.76.23.62	10.76.23.62
64	10.76.23.63/32	10.76.23.63 – 10.76.23.63	10.76.23.63
65	10.76.23.64/32	10.76.23.64 – 10.76.23.64	10.76.23.64
66	10.76.23.65/32	10.76.23.65 – 10.76.23.65	10.76.23.65
67	10.76.23.66/32	10.76.23.66 – 10.76.23.66	10.76.23.66
68	10.76.23.67/32	10.76.23.67 – 10.76.23.67	10.76.23.67
69	10.76.23.68/32	10.76.23.68 – 10.76.23.68	10.76.23.68
70	10.76.23.69/32	10.76.23.69 – 10.76.23.69	10.76.23.69
71	10.76.23.70/32	10.76.23.70 – 10.76.23.70	10.76.23.70
72	10.76.23.71/32	10.76.23.71 – 10.76.23.71	10.76.23.71
73	10.76.23.72/32	10.76.23.72 – 10.76.23.72	10.76.23.72
74	10.76.23.73/32	10.76.23.73 – 10.76.23.73	10.76.23.73
75	10.76.23.74/32	10.76.23.74 – 10.76.23.74	10.76.23.74
76	10.76.23.75/32	10.76.23.75 – 10.76.23.75	10.76.23.75
77	10.76.23.76/32	10.76.23.76 – 10.76.23.76	10.76.23.76
78	10.76.23.77/32	10.76.23.77 – 10.76.23.77	10.76.23.77
79	10.76.23.78/32	10.76.23.78 – 10.76.23.78	10.76.23.78
80	10.76.23.79/32	10.76.23.79 – 10.76.23.79	10.76.23.79
81	10.76.23.80/32	10.76.23.80 – 10.76.23.80	10.76.23.80
82	10.76.23.81/32	10.76.23.81 – 10.76.23.81	10.76.23.81
83	10.76.23.82/32	10.76.23.82 – 10.76.23.82	10.76.23.82
84	10.76.23.83/32	10.76.23.83 – 10.76.23.83	10.76.23.83
85	10.76.23.84/32	10.76.23.84 – 10.76.23.84	10.76.23.84
86	10.76.23.85/32	10.76.23.85 – 10.76.23.85	10.76.23.85
87	10.76.23.86/32	10.76.23.86 – 10.76.23.86	10.76.23.86
88	10.76.23.87/32	10.76.23.87 – 10.76.23.87	10.76.23.87
89	10.76.23.88/32	10.76.23.88 – 10.76.23.88	10.76.23.88
90	10.76.23.89/32	10.76.23.89 – 10.76.23.89	10.76.23.89
91	10.76.23.90/32	10.76.23.90 – 10.76.23.90	10.76.23.90
92	10.76.23.91/32	10.76.23.91 – 10.76.23.91	10.76.23.91
93	10.76.23.92/32	10.76.23.92 – 10.76.23.92	10.76.23.92
94	10.76.23.93/32	10.76.23.93 – 10.76.23.93	10.76.23.93
95	10.76.23.94/32	10.76.23.94 – 10.76.23.94	10.76.23.94
96	10.76.23.95/32	10.76.23.95 – 10.76.23.95	10.76.23.95
97	10.76.23.96/32	10.76.23.96 – 10.76.23.96	10.76.23.96
98	10.76.23.97/32	10.76.23.97 – 10.76.23.97	10.76.23.97
99	10.76.23.98/32	10.76.23.98 – 10.76.23.98	10.76.23.98
100	10.76.23.99/32	10.76.23.99 – 10.76.23.99	10.76.23.99
101	10.76.23.100/32	10.76.23.100 – 10.76.23.100	10.76.23.100
102	10.76.23.101/32	10.76.23.101 – 10.76.23.101	10.76.23.101
103	10.76.23.102/32	10.76.23.102 – 10.76.23.102	10.76.23.102
104	10.76.23.103/32	10.76.23.103 – 10.76.23.103	10.76.23.103
105	10.76.23.104/32	10.76.23.104 – 10.76.23.104	10.76.23.104
106	10.76.23.105/32	10.76.23.105 – 10.76.23.105	10.76.23.105
107	10.76.23.106/32	10.76.23.106 – 10.76.23.106	10.76.23.106
108	10.76.23.107/32	10.76.23.107 – 10.76.23.107	10.76.23.107
109	10.76.23.108/32	10.76.23.108 – 10.76.23.108	10.76.23.108
110	10.76.23.109/32	10.76.23.109 – 10.76.23.109	10.76.23.109
111	10.76.23.110/32	10.76.23.110 – 10.76.23.110	10.76.23.110
112	10.76.23.111/32	10.76.23.111 – 10.76.23.111	10.76.23.111
113	10.76.23.112/32	10.76.23.112 – 10.76.23.112	10.76.23.112
114	10.76.23.113/32	10.76.23.113 – 10.76.23.113	10.76.23.113
115	10.76.23.114/32	10.76.23.114 – 10.76.23.114	10.76.23.114
116	10.76.23.115/32	10.76.23.115 – 10.76.23.115	10.76.23.115
117	10.76.23.116/32	10.76.23.116 – 10.76.23.116	10.76.23.116
118	10.76.23.117/32	10.76.23.117 – 10.76.23.117	10.76.23.117
119	10.76.23.118/32	10.76.23.118 – 10.76.23.118	10.76.23.118
120	10.76.23.119/32	10.76.23.119 – 10.76.23.119	10.76.23.119
121	10.76.23.120/32	10.76.23.120 – 10.76.23.120	10.76.23.120
122	10.76.23.121/32	10.76.23.121 – 10.76.23.121	10.76.23.121
123	10.76.23.122/32	10.76.23.122 – 10.76.23.122	10.76.23.122
124	10.76.23.123/32	10.76.23.123 – 10.76.23.123	10.76.23.123
125	10.76.23.124/32	10.76.23.124 – 10.76.23.124	10.76.23.124
126	10.76.23.125/32	10.76.23.125 – 10.76.23.125	10.76.23.125
127	10.76.23.126/32	10.76.23.126 – 10.76.23.126	10.76.23.126
128	10.76.23.127/32	10.76.23.127 – 10.76.23.127	10.76.23.127
129	10.76.23.128/32	10.76.23.128 – 10.76.23.128	10.76.23.128
130	10.76.23.129/32	10.76.23.129 – 10.76.23.129	10.76.23.129
131	10.76.23.130/32	10.76.23.130 – 10.76.23.130	10.76.23.130
132	10.76.23.131/32	10.76.23.131 – 10.76.23.131	10.76.23.131
133	10.76.23.132/32	10.76.23.132 – 10.76.23.132	10.76.23.132
134	10.76.23.133/32	10.76.23.133 – 10.76.23.133	10.76.23.133
135	10.76.23.134/32	10.76.23.134 – 10.76.23.134	10.76.23.134
136	10.76.23.135/32	10.76.23.135 – 10.76.23.135	10.76.23.135
137	10.76.23.136/32	10.76.23.136 – 10.76.23.136	10.76.23.136
138	10.76.23.137/32	10.76.23.137 – 10.76.23.137	10.76.23.137
139	10.76.23.138/32	10.76.23.138 – 10.76.23.138	10.76.23.138
140	10.76.23.139/32	10.76.23.139 – 10.76.23.139	10.76.23.139
141	10.76.23.140/32	10.76.23.140 – 10.76.23.140	10.76.23.140
142	10.76.23.141/32	10.76.23.141 – 10.76.23.141	10.76.23.141
143	10.76.23.142/32	10.76.23.142 – 10.76.23.142	10.76.23.142
144	10.76.23.143/32	10.76.23.143 – 10.76.23.143	10.76.23.143
145	10.76.23.144/32	10.76.23.144 – 10.76.23.144	10.76.23.144
146	10.76.23.145/32	10.76.23.145 – 10.76.23.145	10.76.23.145
147	10.76.23.146/32	10.76.23.146 – 10.76.23.146	10.76.23.146
148	10.76.23.147/32	10.76.23.147 – 10.76.23.147	10.76.23.147
149	10.76.23.148/32	10.76.23.148 – 10.76.23.148	10.76.23.148
150	10.76.23.149/32	10.76.23.149 – 10.76.23.149	10.76.23.149
151	10.76.23.150/32	10.76.23.150 – 10.76.23.150	10.76.23.150
152	10.76.23.151/32	10.76.23.151 – 10.76.23.151	10.76.23.151
153	10.76.23.152/32	10.76.23.152 – 10.76.23.152	10.76.23.152
154	10.76.23.153/32	10.76.23.153 – 10.76.23.153	10.76.23.153
155	10.76.23.154/32	10.76.23.154 – 10.76.23.154	10.76.23.154
156	10.76.23.155/32	10.76.23.155 – 10.76.23.155	10.76.23.155
157	10.76.23.156/32	10.76.23.156 – 10.76.23.156	10.76.23.156
158	10.76.23.157/32	10.76.23.157 – 10.76.23.157	10.76.23.157
159	10.76.23.158/32	10.76.23.158 – 10.76.23.158	10.76.23.158
160	10.76.23.159/32	10.76.23.159 – 10.76.23.159	10.76.23.159
161	10.76.23.160/32	10.76.23.160 – 10.76.23.160	10.76.23.160
162	10.76.23.161/32	10.76.23.161 – 10.76.23.161	10.76.23.161
163	10.76.23.162/32	10.76.23.162 – 10.76.23.162	10.76.23.162
164	10.76.23.163/32	10.76.23.163 – 10.76.23.163	10.76.23.163
165	10.76.23.164/32	10.76.23.164 – 10.76.23.164	10.76.23.164
166	10.76.23.165/32	10.76.23.165 – 10.76.23.165	10.76.23.165
167	10.76.23.166/32	10.76.23.166 – 10.76.23.166	10.76.23.166
168	10.76.23.167/32	10.76.23.167 – 10.76.23.167	10.76.23.167
169	10.76.23.168/32	10.76.23.168 – 10.76.23.168	10.76.23.168
170	10.76.23.169/32	10.76.23.169 – 10.76.23.169	10.76.23.169
171	10.76.23.170/32	10.76.23.170 – 10.76.23.170	10.76.23.170
172	10.76.23.171/32	10.76.23.171 – 10.76.23.171	10.76.23.171
173	10.76.23.172/32	10.76.23.172 – 10.76.23.172	10.76.23.172
174	10.76.23.173/32	10.76.23.173 – 10.76.23.173	10.76.23.173
175	10.76.23.174/32	10.76.23.174 – 10.76.23.174	10.76.23.174
176	10.76.23.175/32	10.76.23.175 – 10.76.23.175	10.76.23.175
177	10.76.23.176/32	10.76.23.176 – 10.76.23.176	10.76.23.176
178	10.76.23.177/32	10.76.23.177 – 10.76.23.177	10.76.23.177
179	10.76.23.178/32	10.76.23.178 – 10.76.23.178	10.76.23.178
180	10.76.23.179/32	10.76.23.179 – 10.76.23.179	10.76.23.179
181	10.76.23.180/32	10.76.23.180 – 10.76.23.180	10.76.23.180
182	10.76.23.181/32	10.76.23.181 – 10.76.23.181	10.76.23.181
183	10.76.23.182/32	10.76.23.182 – 10.76.23.182	10.76.23.182
184	10.76.23.183/32	10.76.23.183 – 10.76.23.183	10.76.23.183
185	10.76.23.184/32	10.76.23.184 – 10.76.23.184	10.76.23.184
186	10.76.23.185/32	10.76.23.185 – 10.76.23.185	10.76.23.185
187	10.76.23.186/32	10.76.23.186 – 10.76.23.186	10.76.23.186
188	10.76.23.187/32	10.76.23.187 – 10.76.23.187	10.76.23.187
189	10.76.23.188/32	10.76.23.188 – 10.76.23.188	10.76.23.188
190	10.76.23.189/32	10.76.23.189 – 10.76.23.189	10.76.23.189
191	10.76.23.190/32	10.76.23.190 – 10.76.23.190	10.76.23.190
192	10.76.23.191/32	10.76.23.191 – 10.76.23.191	10.76.23.191
193	10.76.23.192/32	10.76.23.192 – 10.76.23.192	10.76.23.192
194	10.76.23.193/32	10.76.23.193 – 10.76.23.193	10.76.23.193
195	10.76.23.194/32	10.76.23.194 – 10.76.23.194	10.76.23.194
196	10.76.23.195/32	10.76.23.195 – 10.76.23.195	10.76.23.195
197	10.76.23.196/32	10.76.23.196 – 10.76.23.196	10.76.23.196
198	10.76.23.197/32	10.76.23.197 – 10.76.23.197	10.76.23.197
199	10.76.23.198/32	10.76.23.198 – 10.76.23.198	10.76.23.198
200	10.76.23.199/32	10.76.23.199 – 10.76.23.199	10.76.23.199
201	10.76.23.200/32	10.76.23.200 – 10.76.23.200	10.76.23.200
202	10.76.23.201/32	10.76.23.201 – 10.76.23.201	10.76.23.201
203	10.76.23.202/32	10.76.23.202 – 10.76.23.202	10.76.23.202
204	10.76.23.203/32	10.76.23.203 – 10.76.23.203	10.76.23.203
205	10.76.23.204/32	10.76.23.204 – 10.76.23.204	10.76.23.204
206	10.76.23.205/32	10.76.23.205 – 10.76.23.205	10.76.23.205
207	10.76.23.206/32	10.76.23.206 – 10.76.23.206	10.76.23.206
208	10.76.23.207/32	10.76.23.207 – 10.76.23.207	10.76.23.207
209	10.76.23.208/32	10.76.23.208 – 10.76.23.208	10.76.23.208
210	10.76.23.209/32	10.76.23.209 – 10.76.23.209	10.76.23.209
211	10.76.23.210/32	10.76.23.210 – 10.76.23.210	10.76.23.210
212	10.76.23.211/32	10.76.23.211 – 10.76.23.211	10.76.23.211
213	10.76.23.212/32	10.76.23.212 – 10.76.23.212	10.76.23.212
214	10.76.23.213/32	10.76.23.213 – 10.76.23.213	10.76.23.213
215	10.76.23.214/32	10.76.23.214 – 10.76.23.214	10.76.23.214
216	10.76.23.215/32	10.76.23.215 – 10.76.23.215	10.76.23.215
217	10.76.23.216/32	10.76.23.216 – 10.76.23.216	10.76.23.216
218	10.76.23.217/32	10.76.23.217 – 10.76.23.217	10.76.23.217
219	10.76.23.218/32	10.76.23.218 – 10.76.23.218	10.76.23.218
220	10.76.23.219/32	10.76.23.219 – 10.76.23.219	10.76.23.219
221	10.76.23.220/32	10.76.23.220 – 10.76.23.220	10.76.23.220
222	10.76.23.221/32	10.76.23.221 – 10.76.23.221	10.76.23.221
223	10.76.23.222/32	10.76.23.222 – 10.76.23.222	10.76.23.222
224	10.76.23.223/32	10.76.23.223 – 10.76.23.223	10.76.23.223
225	10.76.23.224/32	10.76.23.224 – 10.76.23.224	10.76.23.224
226	10.76.23.225/32	10.76.23.225 – 10.76.23.225	10.76.23.225
227	10.76.23.226/32	10.76.23.226 – 10.76.23.226	10.76.23.226
228	10.76.23.227/32	10.76.23.227 – 10.76.23.227	10.76.23.227
229	10.76.23.228/32	10.76.23.228 – 10.76.23.228	10.76.23.228
230	10.76.23.229/32	10.76.23.229 – 10.76.23.229	10.76.23.229
231	10.76.23.230/32	10.76.23.230 – 10.76.23.230	10.76.23.230
232	10.76.23.231/32	10.76.23.231 – 10.76.23.231	10.76.23.231
233	10.76.23.232/32	10.76.23.232 – 10.76.23.232	10.76.23.232
234	10.76.23.233/32	10.76.23.233 – 10.76.23.233	10.76.23.233
235	10.76.23.234/32	10.76.23.234 – 10.76.23.234	10.76.23.234
236	10.76.23.235/32	10.76.23.235 – 10.76.23.235	10.76.23.235
237	10.76.23.236/32	10.76.23.236 – 10.76.23.236	10.76.23.236
238	10.76.23.237/32	10.76.23.237 – 10.76.23.237	10.76.23.237
239	10.76.23.238/32	10.76.23.238 – 10.76.23.238	10.76.23.238
240	10.76.23.239/32	10.76.23.239 – 10.76.23.239	10.76.23.239
241	10.76.23.240/32	10.76.23.240 – 10.76.23.240	10.76.23.240
242	10.76.23.241/32	10.76.23.241 – 10.76.23.241	10.76.23.241
243	10.76.23.242/32	10.76.23.242 – 10.76.23.242	10.76.23.242
244	10.76.23.243/32	10.76.23.243 – 10.76.23.243	10.76.23.243
245	10.76.23.244/32	10.76.23.244 – 10.76.23.244	10.76.23.244
246	10.76.23.245/32	10.76.23.245 – 10.76.23.245	10.76.23.245
247	10.76.23.246/32	10.76.23.246 – 10.76.23.246	10.76.23.246
248	10.76.23.247/32	10.76.23.247 – 10.76.23.247	10.76.23.247
249	10.76.23.248/32	10.76.23.248 – 10.76.23.248	10.76.23.248
250	10.76.23.249/32	10.76.23.249 – 10.76.23.249	10.76.23.249
251	10.76.23.250/32	10.76.23.250 – 10.76.23.250	10.76.23.250
252	10.76.23.251/32	10.76.23.251 – 10.76.23.251	10.76.23.251
253	10.76.23.252/32	10.76.23.252 – 10.76.23.252	10.76.23.252
254	10.76.23.253/32	10.76.23.253 – 10.76.23.253	10.76.23.253
255	10.76.23.254/32	10.76.23.254 – 10.76.23.254	10.76.23.254
256	10.76.23.255/32	10.76.23.255 – 10.76.23.255	10.76.23.255

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 →