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)10.78.210.0/23

network10.78.210.0/23

broadcast10.78.211.255

first host10.78.210.1

last host10.78.211.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.78.210.0/23

address00001010.01001110.11010010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001110.11010010.00000000

broadcast00001010.01001110.11010011.11111111

green = network part, grey = host part

hex0x0a4ed200

decimal172937728

reverse dns0.210.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:d200

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.78.210.0/32	10.78.210.0 – 10.78.210.0	10.78.210.0
2	10.78.210.1/32	10.78.210.1 – 10.78.210.1	10.78.210.1
3	10.78.210.2/32	10.78.210.2 – 10.78.210.2	10.78.210.2
4	10.78.210.3/32	10.78.210.3 – 10.78.210.3	10.78.210.3
5	10.78.210.4/32	10.78.210.4 – 10.78.210.4	10.78.210.4
6	10.78.210.5/32	10.78.210.5 – 10.78.210.5	10.78.210.5
7	10.78.210.6/32	10.78.210.6 – 10.78.210.6	10.78.210.6
8	10.78.210.7/32	10.78.210.7 – 10.78.210.7	10.78.210.7
9	10.78.210.8/32	10.78.210.8 – 10.78.210.8	10.78.210.8
10	10.78.210.9/32	10.78.210.9 – 10.78.210.9	10.78.210.9
11	10.78.210.10/32	10.78.210.10 – 10.78.210.10	10.78.210.10
12	10.78.210.11/32	10.78.210.11 – 10.78.210.11	10.78.210.11
13	10.78.210.12/32	10.78.210.12 – 10.78.210.12	10.78.210.12
14	10.78.210.13/32	10.78.210.13 – 10.78.210.13	10.78.210.13
15	10.78.210.14/32	10.78.210.14 – 10.78.210.14	10.78.210.14
16	10.78.210.15/32	10.78.210.15 – 10.78.210.15	10.78.210.15
17	10.78.210.16/32	10.78.210.16 – 10.78.210.16	10.78.210.16
18	10.78.210.17/32	10.78.210.17 – 10.78.210.17	10.78.210.17
19	10.78.210.18/32	10.78.210.18 – 10.78.210.18	10.78.210.18
20	10.78.210.19/32	10.78.210.19 – 10.78.210.19	10.78.210.19
21	10.78.210.20/32	10.78.210.20 – 10.78.210.20	10.78.210.20
22	10.78.210.21/32	10.78.210.21 – 10.78.210.21	10.78.210.21
23	10.78.210.22/32	10.78.210.22 – 10.78.210.22	10.78.210.22
24	10.78.210.23/32	10.78.210.23 – 10.78.210.23	10.78.210.23
25	10.78.210.24/32	10.78.210.24 – 10.78.210.24	10.78.210.24
26	10.78.210.25/32	10.78.210.25 – 10.78.210.25	10.78.210.25
27	10.78.210.26/32	10.78.210.26 – 10.78.210.26	10.78.210.26
28	10.78.210.27/32	10.78.210.27 – 10.78.210.27	10.78.210.27
29	10.78.210.28/32	10.78.210.28 – 10.78.210.28	10.78.210.28
30	10.78.210.29/32	10.78.210.29 – 10.78.210.29	10.78.210.29
31	10.78.210.30/32	10.78.210.30 – 10.78.210.30	10.78.210.30
32	10.78.210.31/32	10.78.210.31 – 10.78.210.31	10.78.210.31
33	10.78.210.32/32	10.78.210.32 – 10.78.210.32	10.78.210.32
34	10.78.210.33/32	10.78.210.33 – 10.78.210.33	10.78.210.33
35	10.78.210.34/32	10.78.210.34 – 10.78.210.34	10.78.210.34
36	10.78.210.35/32	10.78.210.35 – 10.78.210.35	10.78.210.35
37	10.78.210.36/32	10.78.210.36 – 10.78.210.36	10.78.210.36
38	10.78.210.37/32	10.78.210.37 – 10.78.210.37	10.78.210.37
39	10.78.210.38/32	10.78.210.38 – 10.78.210.38	10.78.210.38
40	10.78.210.39/32	10.78.210.39 – 10.78.210.39	10.78.210.39
41	10.78.210.40/32	10.78.210.40 – 10.78.210.40	10.78.210.40
42	10.78.210.41/32	10.78.210.41 – 10.78.210.41	10.78.210.41
43	10.78.210.42/32	10.78.210.42 – 10.78.210.42	10.78.210.42
44	10.78.210.43/32	10.78.210.43 – 10.78.210.43	10.78.210.43
45	10.78.210.44/32	10.78.210.44 – 10.78.210.44	10.78.210.44
46	10.78.210.45/32	10.78.210.45 – 10.78.210.45	10.78.210.45
47	10.78.210.46/32	10.78.210.46 – 10.78.210.46	10.78.210.46
48	10.78.210.47/32	10.78.210.47 – 10.78.210.47	10.78.210.47
49	10.78.210.48/32	10.78.210.48 – 10.78.210.48	10.78.210.48
50	10.78.210.49/32	10.78.210.49 – 10.78.210.49	10.78.210.49
51	10.78.210.50/32	10.78.210.50 – 10.78.210.50	10.78.210.50
52	10.78.210.51/32	10.78.210.51 – 10.78.210.51	10.78.210.51
53	10.78.210.52/32	10.78.210.52 – 10.78.210.52	10.78.210.52
54	10.78.210.53/32	10.78.210.53 – 10.78.210.53	10.78.210.53
55	10.78.210.54/32	10.78.210.54 – 10.78.210.54	10.78.210.54
56	10.78.210.55/32	10.78.210.55 – 10.78.210.55	10.78.210.55
57	10.78.210.56/32	10.78.210.56 – 10.78.210.56	10.78.210.56
58	10.78.210.57/32	10.78.210.57 – 10.78.210.57	10.78.210.57
59	10.78.210.58/32	10.78.210.58 – 10.78.210.58	10.78.210.58
60	10.78.210.59/32	10.78.210.59 – 10.78.210.59	10.78.210.59
61	10.78.210.60/32	10.78.210.60 – 10.78.210.60	10.78.210.60
62	10.78.210.61/32	10.78.210.61 – 10.78.210.61	10.78.210.61
63	10.78.210.62/32	10.78.210.62 – 10.78.210.62	10.78.210.62
64	10.78.210.63/32	10.78.210.63 – 10.78.210.63	10.78.210.63
65	10.78.210.64/32	10.78.210.64 – 10.78.210.64	10.78.210.64
66	10.78.210.65/32	10.78.210.65 – 10.78.210.65	10.78.210.65
67	10.78.210.66/32	10.78.210.66 – 10.78.210.66	10.78.210.66
68	10.78.210.67/32	10.78.210.67 – 10.78.210.67	10.78.210.67
69	10.78.210.68/32	10.78.210.68 – 10.78.210.68	10.78.210.68
70	10.78.210.69/32	10.78.210.69 – 10.78.210.69	10.78.210.69
71	10.78.210.70/32	10.78.210.70 – 10.78.210.70	10.78.210.70
72	10.78.210.71/32	10.78.210.71 – 10.78.210.71	10.78.210.71
73	10.78.210.72/32	10.78.210.72 – 10.78.210.72	10.78.210.72
74	10.78.210.73/32	10.78.210.73 – 10.78.210.73	10.78.210.73
75	10.78.210.74/32	10.78.210.74 – 10.78.210.74	10.78.210.74
76	10.78.210.75/32	10.78.210.75 – 10.78.210.75	10.78.210.75
77	10.78.210.76/32	10.78.210.76 – 10.78.210.76	10.78.210.76
78	10.78.210.77/32	10.78.210.77 – 10.78.210.77	10.78.210.77
79	10.78.210.78/32	10.78.210.78 – 10.78.210.78	10.78.210.78
80	10.78.210.79/32	10.78.210.79 – 10.78.210.79	10.78.210.79
81	10.78.210.80/32	10.78.210.80 – 10.78.210.80	10.78.210.80
82	10.78.210.81/32	10.78.210.81 – 10.78.210.81	10.78.210.81
83	10.78.210.82/32	10.78.210.82 – 10.78.210.82	10.78.210.82
84	10.78.210.83/32	10.78.210.83 – 10.78.210.83	10.78.210.83
85	10.78.210.84/32	10.78.210.84 – 10.78.210.84	10.78.210.84
86	10.78.210.85/32	10.78.210.85 – 10.78.210.85	10.78.210.85
87	10.78.210.86/32	10.78.210.86 – 10.78.210.86	10.78.210.86
88	10.78.210.87/32	10.78.210.87 – 10.78.210.87	10.78.210.87
89	10.78.210.88/32	10.78.210.88 – 10.78.210.88	10.78.210.88
90	10.78.210.89/32	10.78.210.89 – 10.78.210.89	10.78.210.89
91	10.78.210.90/32	10.78.210.90 – 10.78.210.90	10.78.210.90
92	10.78.210.91/32	10.78.210.91 – 10.78.210.91	10.78.210.91
93	10.78.210.92/32	10.78.210.92 – 10.78.210.92	10.78.210.92
94	10.78.210.93/32	10.78.210.93 – 10.78.210.93	10.78.210.93
95	10.78.210.94/32	10.78.210.94 – 10.78.210.94	10.78.210.94
96	10.78.210.95/32	10.78.210.95 – 10.78.210.95	10.78.210.95
97	10.78.210.96/32	10.78.210.96 – 10.78.210.96	10.78.210.96
98	10.78.210.97/32	10.78.210.97 – 10.78.210.97	10.78.210.97
99	10.78.210.98/32	10.78.210.98 – 10.78.210.98	10.78.210.98
100	10.78.210.99/32	10.78.210.99 – 10.78.210.99	10.78.210.99
101	10.78.210.100/32	10.78.210.100 – 10.78.210.100	10.78.210.100
102	10.78.210.101/32	10.78.210.101 – 10.78.210.101	10.78.210.101
103	10.78.210.102/32	10.78.210.102 – 10.78.210.102	10.78.210.102
104	10.78.210.103/32	10.78.210.103 – 10.78.210.103	10.78.210.103
105	10.78.210.104/32	10.78.210.104 – 10.78.210.104	10.78.210.104
106	10.78.210.105/32	10.78.210.105 – 10.78.210.105	10.78.210.105
107	10.78.210.106/32	10.78.210.106 – 10.78.210.106	10.78.210.106
108	10.78.210.107/32	10.78.210.107 – 10.78.210.107	10.78.210.107
109	10.78.210.108/32	10.78.210.108 – 10.78.210.108	10.78.210.108
110	10.78.210.109/32	10.78.210.109 – 10.78.210.109	10.78.210.109
111	10.78.210.110/32	10.78.210.110 – 10.78.210.110	10.78.210.110
112	10.78.210.111/32	10.78.210.111 – 10.78.210.111	10.78.210.111
113	10.78.210.112/32	10.78.210.112 – 10.78.210.112	10.78.210.112
114	10.78.210.113/32	10.78.210.113 – 10.78.210.113	10.78.210.113
115	10.78.210.114/32	10.78.210.114 – 10.78.210.114	10.78.210.114
116	10.78.210.115/32	10.78.210.115 – 10.78.210.115	10.78.210.115
117	10.78.210.116/32	10.78.210.116 – 10.78.210.116	10.78.210.116
118	10.78.210.117/32	10.78.210.117 – 10.78.210.117	10.78.210.117
119	10.78.210.118/32	10.78.210.118 – 10.78.210.118	10.78.210.118
120	10.78.210.119/32	10.78.210.119 – 10.78.210.119	10.78.210.119
121	10.78.210.120/32	10.78.210.120 – 10.78.210.120	10.78.210.120
122	10.78.210.121/32	10.78.210.121 – 10.78.210.121	10.78.210.121
123	10.78.210.122/32	10.78.210.122 – 10.78.210.122	10.78.210.122
124	10.78.210.123/32	10.78.210.123 – 10.78.210.123	10.78.210.123
125	10.78.210.124/32	10.78.210.124 – 10.78.210.124	10.78.210.124
126	10.78.210.125/32	10.78.210.125 – 10.78.210.125	10.78.210.125
127	10.78.210.126/32	10.78.210.126 – 10.78.210.126	10.78.210.126
128	10.78.210.127/32	10.78.210.127 – 10.78.210.127	10.78.210.127
129	10.78.210.128/32	10.78.210.128 – 10.78.210.128	10.78.210.128
130	10.78.210.129/32	10.78.210.129 – 10.78.210.129	10.78.210.129
131	10.78.210.130/32	10.78.210.130 – 10.78.210.130	10.78.210.130
132	10.78.210.131/32	10.78.210.131 – 10.78.210.131	10.78.210.131
133	10.78.210.132/32	10.78.210.132 – 10.78.210.132	10.78.210.132
134	10.78.210.133/32	10.78.210.133 – 10.78.210.133	10.78.210.133
135	10.78.210.134/32	10.78.210.134 – 10.78.210.134	10.78.210.134
136	10.78.210.135/32	10.78.210.135 – 10.78.210.135	10.78.210.135
137	10.78.210.136/32	10.78.210.136 – 10.78.210.136	10.78.210.136
138	10.78.210.137/32	10.78.210.137 – 10.78.210.137	10.78.210.137
139	10.78.210.138/32	10.78.210.138 – 10.78.210.138	10.78.210.138
140	10.78.210.139/32	10.78.210.139 – 10.78.210.139	10.78.210.139
141	10.78.210.140/32	10.78.210.140 – 10.78.210.140	10.78.210.140
142	10.78.210.141/32	10.78.210.141 – 10.78.210.141	10.78.210.141
143	10.78.210.142/32	10.78.210.142 – 10.78.210.142	10.78.210.142
144	10.78.210.143/32	10.78.210.143 – 10.78.210.143	10.78.210.143
145	10.78.210.144/32	10.78.210.144 – 10.78.210.144	10.78.210.144
146	10.78.210.145/32	10.78.210.145 – 10.78.210.145	10.78.210.145
147	10.78.210.146/32	10.78.210.146 – 10.78.210.146	10.78.210.146
148	10.78.210.147/32	10.78.210.147 – 10.78.210.147	10.78.210.147
149	10.78.210.148/32	10.78.210.148 – 10.78.210.148	10.78.210.148
150	10.78.210.149/32	10.78.210.149 – 10.78.210.149	10.78.210.149
151	10.78.210.150/32	10.78.210.150 – 10.78.210.150	10.78.210.150
152	10.78.210.151/32	10.78.210.151 – 10.78.210.151	10.78.210.151
153	10.78.210.152/32	10.78.210.152 – 10.78.210.152	10.78.210.152
154	10.78.210.153/32	10.78.210.153 – 10.78.210.153	10.78.210.153
155	10.78.210.154/32	10.78.210.154 – 10.78.210.154	10.78.210.154
156	10.78.210.155/32	10.78.210.155 – 10.78.210.155	10.78.210.155
157	10.78.210.156/32	10.78.210.156 – 10.78.210.156	10.78.210.156
158	10.78.210.157/32	10.78.210.157 – 10.78.210.157	10.78.210.157
159	10.78.210.158/32	10.78.210.158 – 10.78.210.158	10.78.210.158
160	10.78.210.159/32	10.78.210.159 – 10.78.210.159	10.78.210.159
161	10.78.210.160/32	10.78.210.160 – 10.78.210.160	10.78.210.160
162	10.78.210.161/32	10.78.210.161 – 10.78.210.161	10.78.210.161
163	10.78.210.162/32	10.78.210.162 – 10.78.210.162	10.78.210.162
164	10.78.210.163/32	10.78.210.163 – 10.78.210.163	10.78.210.163
165	10.78.210.164/32	10.78.210.164 – 10.78.210.164	10.78.210.164
166	10.78.210.165/32	10.78.210.165 – 10.78.210.165	10.78.210.165
167	10.78.210.166/32	10.78.210.166 – 10.78.210.166	10.78.210.166
168	10.78.210.167/32	10.78.210.167 – 10.78.210.167	10.78.210.167
169	10.78.210.168/32	10.78.210.168 – 10.78.210.168	10.78.210.168
170	10.78.210.169/32	10.78.210.169 – 10.78.210.169	10.78.210.169
171	10.78.210.170/32	10.78.210.170 – 10.78.210.170	10.78.210.170
172	10.78.210.171/32	10.78.210.171 – 10.78.210.171	10.78.210.171
173	10.78.210.172/32	10.78.210.172 – 10.78.210.172	10.78.210.172
174	10.78.210.173/32	10.78.210.173 – 10.78.210.173	10.78.210.173
175	10.78.210.174/32	10.78.210.174 – 10.78.210.174	10.78.210.174
176	10.78.210.175/32	10.78.210.175 – 10.78.210.175	10.78.210.175
177	10.78.210.176/32	10.78.210.176 – 10.78.210.176	10.78.210.176
178	10.78.210.177/32	10.78.210.177 – 10.78.210.177	10.78.210.177
179	10.78.210.178/32	10.78.210.178 – 10.78.210.178	10.78.210.178
180	10.78.210.179/32	10.78.210.179 – 10.78.210.179	10.78.210.179
181	10.78.210.180/32	10.78.210.180 – 10.78.210.180	10.78.210.180
182	10.78.210.181/32	10.78.210.181 – 10.78.210.181	10.78.210.181
183	10.78.210.182/32	10.78.210.182 – 10.78.210.182	10.78.210.182
184	10.78.210.183/32	10.78.210.183 – 10.78.210.183	10.78.210.183
185	10.78.210.184/32	10.78.210.184 – 10.78.210.184	10.78.210.184
186	10.78.210.185/32	10.78.210.185 – 10.78.210.185	10.78.210.185
187	10.78.210.186/32	10.78.210.186 – 10.78.210.186	10.78.210.186
188	10.78.210.187/32	10.78.210.187 – 10.78.210.187	10.78.210.187
189	10.78.210.188/32	10.78.210.188 – 10.78.210.188	10.78.210.188
190	10.78.210.189/32	10.78.210.189 – 10.78.210.189	10.78.210.189
191	10.78.210.190/32	10.78.210.190 – 10.78.210.190	10.78.210.190
192	10.78.210.191/32	10.78.210.191 – 10.78.210.191	10.78.210.191
193	10.78.210.192/32	10.78.210.192 – 10.78.210.192	10.78.210.192
194	10.78.210.193/32	10.78.210.193 – 10.78.210.193	10.78.210.193
195	10.78.210.194/32	10.78.210.194 – 10.78.210.194	10.78.210.194
196	10.78.210.195/32	10.78.210.195 – 10.78.210.195	10.78.210.195
197	10.78.210.196/32	10.78.210.196 – 10.78.210.196	10.78.210.196
198	10.78.210.197/32	10.78.210.197 – 10.78.210.197	10.78.210.197
199	10.78.210.198/32	10.78.210.198 – 10.78.210.198	10.78.210.198
200	10.78.210.199/32	10.78.210.199 – 10.78.210.199	10.78.210.199
201	10.78.210.200/32	10.78.210.200 – 10.78.210.200	10.78.210.200
202	10.78.210.201/32	10.78.210.201 – 10.78.210.201	10.78.210.201
203	10.78.210.202/32	10.78.210.202 – 10.78.210.202	10.78.210.202
204	10.78.210.203/32	10.78.210.203 – 10.78.210.203	10.78.210.203
205	10.78.210.204/32	10.78.210.204 – 10.78.210.204	10.78.210.204
206	10.78.210.205/32	10.78.210.205 – 10.78.210.205	10.78.210.205
207	10.78.210.206/32	10.78.210.206 – 10.78.210.206	10.78.210.206
208	10.78.210.207/32	10.78.210.207 – 10.78.210.207	10.78.210.207
209	10.78.210.208/32	10.78.210.208 – 10.78.210.208	10.78.210.208
210	10.78.210.209/32	10.78.210.209 – 10.78.210.209	10.78.210.209
211	10.78.210.210/32	10.78.210.210 – 10.78.210.210	10.78.210.210
212	10.78.210.211/32	10.78.210.211 – 10.78.210.211	10.78.210.211
213	10.78.210.212/32	10.78.210.212 – 10.78.210.212	10.78.210.212
214	10.78.210.213/32	10.78.210.213 – 10.78.210.213	10.78.210.213
215	10.78.210.214/32	10.78.210.214 – 10.78.210.214	10.78.210.214
216	10.78.210.215/32	10.78.210.215 – 10.78.210.215	10.78.210.215
217	10.78.210.216/32	10.78.210.216 – 10.78.210.216	10.78.210.216
218	10.78.210.217/32	10.78.210.217 – 10.78.210.217	10.78.210.217
219	10.78.210.218/32	10.78.210.218 – 10.78.210.218	10.78.210.218
220	10.78.210.219/32	10.78.210.219 – 10.78.210.219	10.78.210.219
221	10.78.210.220/32	10.78.210.220 – 10.78.210.220	10.78.210.220
222	10.78.210.221/32	10.78.210.221 – 10.78.210.221	10.78.210.221
223	10.78.210.222/32	10.78.210.222 – 10.78.210.222	10.78.210.222
224	10.78.210.223/32	10.78.210.223 – 10.78.210.223	10.78.210.223
225	10.78.210.224/32	10.78.210.224 – 10.78.210.224	10.78.210.224
226	10.78.210.225/32	10.78.210.225 – 10.78.210.225	10.78.210.225
227	10.78.210.226/32	10.78.210.226 – 10.78.210.226	10.78.210.226
228	10.78.210.227/32	10.78.210.227 – 10.78.210.227	10.78.210.227
229	10.78.210.228/32	10.78.210.228 – 10.78.210.228	10.78.210.228
230	10.78.210.229/32	10.78.210.229 – 10.78.210.229	10.78.210.229
231	10.78.210.230/32	10.78.210.230 – 10.78.210.230	10.78.210.230
232	10.78.210.231/32	10.78.210.231 – 10.78.210.231	10.78.210.231
233	10.78.210.232/32	10.78.210.232 – 10.78.210.232	10.78.210.232
234	10.78.210.233/32	10.78.210.233 – 10.78.210.233	10.78.210.233
235	10.78.210.234/32	10.78.210.234 – 10.78.210.234	10.78.210.234
236	10.78.210.235/32	10.78.210.235 – 10.78.210.235	10.78.210.235
237	10.78.210.236/32	10.78.210.236 – 10.78.210.236	10.78.210.236
238	10.78.210.237/32	10.78.210.237 – 10.78.210.237	10.78.210.237
239	10.78.210.238/32	10.78.210.238 – 10.78.210.238	10.78.210.238
240	10.78.210.239/32	10.78.210.239 – 10.78.210.239	10.78.210.239
241	10.78.210.240/32	10.78.210.240 – 10.78.210.240	10.78.210.240
242	10.78.210.241/32	10.78.210.241 – 10.78.210.241	10.78.210.241
243	10.78.210.242/32	10.78.210.242 – 10.78.210.242	10.78.210.242
244	10.78.210.243/32	10.78.210.243 – 10.78.210.243	10.78.210.243
245	10.78.210.244/32	10.78.210.244 – 10.78.210.244	10.78.210.244
246	10.78.210.245/32	10.78.210.245 – 10.78.210.245	10.78.210.245
247	10.78.210.246/32	10.78.210.246 – 10.78.210.246	10.78.210.246
248	10.78.210.247/32	10.78.210.247 – 10.78.210.247	10.78.210.247
249	10.78.210.248/32	10.78.210.248 – 10.78.210.248	10.78.210.248
250	10.78.210.249/32	10.78.210.249 – 10.78.210.249	10.78.210.249
251	10.78.210.250/32	10.78.210.250 – 10.78.210.250	10.78.210.250
252	10.78.210.251/32	10.78.210.251 – 10.78.210.251	10.78.210.251
253	10.78.210.252/32	10.78.210.252 – 10.78.210.252	10.78.210.252
254	10.78.210.253/32	10.78.210.253 – 10.78.210.253	10.78.210.253
255	10.78.210.254/32	10.78.210.254 – 10.78.210.254	10.78.210.254
256	10.78.210.255/32	10.78.210.255 – 10.78.210.255	10.78.210.255

showing 256 of 512

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →