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)10.78.252.0/23

network10.78.252.0/23

broadcast10.78.253.255

first host10.78.252.1

last host10.78.253.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.78.252.0/23

address00001010.01001110.11111100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001110.11111100.00000000

broadcast00001010.01001110.11111101.11111111

green = network part, grey = host part

hex0x0a4efc00

decimal172948480

reverse dns0.252.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:fc00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.78.252.0/32	10.78.252.0 – 10.78.252.0	10.78.252.0
2	10.78.252.1/32	10.78.252.1 – 10.78.252.1	10.78.252.1
3	10.78.252.2/32	10.78.252.2 – 10.78.252.2	10.78.252.2
4	10.78.252.3/32	10.78.252.3 – 10.78.252.3	10.78.252.3
5	10.78.252.4/32	10.78.252.4 – 10.78.252.4	10.78.252.4
6	10.78.252.5/32	10.78.252.5 – 10.78.252.5	10.78.252.5
7	10.78.252.6/32	10.78.252.6 – 10.78.252.6	10.78.252.6
8	10.78.252.7/32	10.78.252.7 – 10.78.252.7	10.78.252.7
9	10.78.252.8/32	10.78.252.8 – 10.78.252.8	10.78.252.8
10	10.78.252.9/32	10.78.252.9 – 10.78.252.9	10.78.252.9
11	10.78.252.10/32	10.78.252.10 – 10.78.252.10	10.78.252.10
12	10.78.252.11/32	10.78.252.11 – 10.78.252.11	10.78.252.11
13	10.78.252.12/32	10.78.252.12 – 10.78.252.12	10.78.252.12
14	10.78.252.13/32	10.78.252.13 – 10.78.252.13	10.78.252.13
15	10.78.252.14/32	10.78.252.14 – 10.78.252.14	10.78.252.14
16	10.78.252.15/32	10.78.252.15 – 10.78.252.15	10.78.252.15
17	10.78.252.16/32	10.78.252.16 – 10.78.252.16	10.78.252.16
18	10.78.252.17/32	10.78.252.17 – 10.78.252.17	10.78.252.17
19	10.78.252.18/32	10.78.252.18 – 10.78.252.18	10.78.252.18
20	10.78.252.19/32	10.78.252.19 – 10.78.252.19	10.78.252.19
21	10.78.252.20/32	10.78.252.20 – 10.78.252.20	10.78.252.20
22	10.78.252.21/32	10.78.252.21 – 10.78.252.21	10.78.252.21
23	10.78.252.22/32	10.78.252.22 – 10.78.252.22	10.78.252.22
24	10.78.252.23/32	10.78.252.23 – 10.78.252.23	10.78.252.23
25	10.78.252.24/32	10.78.252.24 – 10.78.252.24	10.78.252.24
26	10.78.252.25/32	10.78.252.25 – 10.78.252.25	10.78.252.25
27	10.78.252.26/32	10.78.252.26 – 10.78.252.26	10.78.252.26
28	10.78.252.27/32	10.78.252.27 – 10.78.252.27	10.78.252.27
29	10.78.252.28/32	10.78.252.28 – 10.78.252.28	10.78.252.28
30	10.78.252.29/32	10.78.252.29 – 10.78.252.29	10.78.252.29
31	10.78.252.30/32	10.78.252.30 – 10.78.252.30	10.78.252.30
32	10.78.252.31/32	10.78.252.31 – 10.78.252.31	10.78.252.31
33	10.78.252.32/32	10.78.252.32 – 10.78.252.32	10.78.252.32
34	10.78.252.33/32	10.78.252.33 – 10.78.252.33	10.78.252.33
35	10.78.252.34/32	10.78.252.34 – 10.78.252.34	10.78.252.34
36	10.78.252.35/32	10.78.252.35 – 10.78.252.35	10.78.252.35
37	10.78.252.36/32	10.78.252.36 – 10.78.252.36	10.78.252.36
38	10.78.252.37/32	10.78.252.37 – 10.78.252.37	10.78.252.37
39	10.78.252.38/32	10.78.252.38 – 10.78.252.38	10.78.252.38
40	10.78.252.39/32	10.78.252.39 – 10.78.252.39	10.78.252.39
41	10.78.252.40/32	10.78.252.40 – 10.78.252.40	10.78.252.40
42	10.78.252.41/32	10.78.252.41 – 10.78.252.41	10.78.252.41
43	10.78.252.42/32	10.78.252.42 – 10.78.252.42	10.78.252.42
44	10.78.252.43/32	10.78.252.43 – 10.78.252.43	10.78.252.43
45	10.78.252.44/32	10.78.252.44 – 10.78.252.44	10.78.252.44
46	10.78.252.45/32	10.78.252.45 – 10.78.252.45	10.78.252.45
47	10.78.252.46/32	10.78.252.46 – 10.78.252.46	10.78.252.46
48	10.78.252.47/32	10.78.252.47 – 10.78.252.47	10.78.252.47
49	10.78.252.48/32	10.78.252.48 – 10.78.252.48	10.78.252.48
50	10.78.252.49/32	10.78.252.49 – 10.78.252.49	10.78.252.49
51	10.78.252.50/32	10.78.252.50 – 10.78.252.50	10.78.252.50
52	10.78.252.51/32	10.78.252.51 – 10.78.252.51	10.78.252.51
53	10.78.252.52/32	10.78.252.52 – 10.78.252.52	10.78.252.52
54	10.78.252.53/32	10.78.252.53 – 10.78.252.53	10.78.252.53
55	10.78.252.54/32	10.78.252.54 – 10.78.252.54	10.78.252.54
56	10.78.252.55/32	10.78.252.55 – 10.78.252.55	10.78.252.55
57	10.78.252.56/32	10.78.252.56 – 10.78.252.56	10.78.252.56
58	10.78.252.57/32	10.78.252.57 – 10.78.252.57	10.78.252.57
59	10.78.252.58/32	10.78.252.58 – 10.78.252.58	10.78.252.58
60	10.78.252.59/32	10.78.252.59 – 10.78.252.59	10.78.252.59
61	10.78.252.60/32	10.78.252.60 – 10.78.252.60	10.78.252.60
62	10.78.252.61/32	10.78.252.61 – 10.78.252.61	10.78.252.61
63	10.78.252.62/32	10.78.252.62 – 10.78.252.62	10.78.252.62
64	10.78.252.63/32	10.78.252.63 – 10.78.252.63	10.78.252.63
65	10.78.252.64/32	10.78.252.64 – 10.78.252.64	10.78.252.64
66	10.78.252.65/32	10.78.252.65 – 10.78.252.65	10.78.252.65
67	10.78.252.66/32	10.78.252.66 – 10.78.252.66	10.78.252.66
68	10.78.252.67/32	10.78.252.67 – 10.78.252.67	10.78.252.67
69	10.78.252.68/32	10.78.252.68 – 10.78.252.68	10.78.252.68
70	10.78.252.69/32	10.78.252.69 – 10.78.252.69	10.78.252.69
71	10.78.252.70/32	10.78.252.70 – 10.78.252.70	10.78.252.70
72	10.78.252.71/32	10.78.252.71 – 10.78.252.71	10.78.252.71
73	10.78.252.72/32	10.78.252.72 – 10.78.252.72	10.78.252.72
74	10.78.252.73/32	10.78.252.73 – 10.78.252.73	10.78.252.73
75	10.78.252.74/32	10.78.252.74 – 10.78.252.74	10.78.252.74
76	10.78.252.75/32	10.78.252.75 – 10.78.252.75	10.78.252.75
77	10.78.252.76/32	10.78.252.76 – 10.78.252.76	10.78.252.76
78	10.78.252.77/32	10.78.252.77 – 10.78.252.77	10.78.252.77
79	10.78.252.78/32	10.78.252.78 – 10.78.252.78	10.78.252.78
80	10.78.252.79/32	10.78.252.79 – 10.78.252.79	10.78.252.79
81	10.78.252.80/32	10.78.252.80 – 10.78.252.80	10.78.252.80
82	10.78.252.81/32	10.78.252.81 – 10.78.252.81	10.78.252.81
83	10.78.252.82/32	10.78.252.82 – 10.78.252.82	10.78.252.82
84	10.78.252.83/32	10.78.252.83 – 10.78.252.83	10.78.252.83
85	10.78.252.84/32	10.78.252.84 – 10.78.252.84	10.78.252.84
86	10.78.252.85/32	10.78.252.85 – 10.78.252.85	10.78.252.85
87	10.78.252.86/32	10.78.252.86 – 10.78.252.86	10.78.252.86
88	10.78.252.87/32	10.78.252.87 – 10.78.252.87	10.78.252.87
89	10.78.252.88/32	10.78.252.88 – 10.78.252.88	10.78.252.88
90	10.78.252.89/32	10.78.252.89 – 10.78.252.89	10.78.252.89
91	10.78.252.90/32	10.78.252.90 – 10.78.252.90	10.78.252.90
92	10.78.252.91/32	10.78.252.91 – 10.78.252.91	10.78.252.91
93	10.78.252.92/32	10.78.252.92 – 10.78.252.92	10.78.252.92
94	10.78.252.93/32	10.78.252.93 – 10.78.252.93	10.78.252.93
95	10.78.252.94/32	10.78.252.94 – 10.78.252.94	10.78.252.94
96	10.78.252.95/32	10.78.252.95 – 10.78.252.95	10.78.252.95
97	10.78.252.96/32	10.78.252.96 – 10.78.252.96	10.78.252.96
98	10.78.252.97/32	10.78.252.97 – 10.78.252.97	10.78.252.97
99	10.78.252.98/32	10.78.252.98 – 10.78.252.98	10.78.252.98
100	10.78.252.99/32	10.78.252.99 – 10.78.252.99	10.78.252.99
101	10.78.252.100/32	10.78.252.100 – 10.78.252.100	10.78.252.100
102	10.78.252.101/32	10.78.252.101 – 10.78.252.101	10.78.252.101
103	10.78.252.102/32	10.78.252.102 – 10.78.252.102	10.78.252.102
104	10.78.252.103/32	10.78.252.103 – 10.78.252.103	10.78.252.103
105	10.78.252.104/32	10.78.252.104 – 10.78.252.104	10.78.252.104
106	10.78.252.105/32	10.78.252.105 – 10.78.252.105	10.78.252.105
107	10.78.252.106/32	10.78.252.106 – 10.78.252.106	10.78.252.106
108	10.78.252.107/32	10.78.252.107 – 10.78.252.107	10.78.252.107
109	10.78.252.108/32	10.78.252.108 – 10.78.252.108	10.78.252.108
110	10.78.252.109/32	10.78.252.109 – 10.78.252.109	10.78.252.109
111	10.78.252.110/32	10.78.252.110 – 10.78.252.110	10.78.252.110
112	10.78.252.111/32	10.78.252.111 – 10.78.252.111	10.78.252.111
113	10.78.252.112/32	10.78.252.112 – 10.78.252.112	10.78.252.112
114	10.78.252.113/32	10.78.252.113 – 10.78.252.113	10.78.252.113
115	10.78.252.114/32	10.78.252.114 – 10.78.252.114	10.78.252.114
116	10.78.252.115/32	10.78.252.115 – 10.78.252.115	10.78.252.115
117	10.78.252.116/32	10.78.252.116 – 10.78.252.116	10.78.252.116
118	10.78.252.117/32	10.78.252.117 – 10.78.252.117	10.78.252.117
119	10.78.252.118/32	10.78.252.118 – 10.78.252.118	10.78.252.118
120	10.78.252.119/32	10.78.252.119 – 10.78.252.119	10.78.252.119
121	10.78.252.120/32	10.78.252.120 – 10.78.252.120	10.78.252.120
122	10.78.252.121/32	10.78.252.121 – 10.78.252.121	10.78.252.121
123	10.78.252.122/32	10.78.252.122 – 10.78.252.122	10.78.252.122
124	10.78.252.123/32	10.78.252.123 – 10.78.252.123	10.78.252.123
125	10.78.252.124/32	10.78.252.124 – 10.78.252.124	10.78.252.124
126	10.78.252.125/32	10.78.252.125 – 10.78.252.125	10.78.252.125
127	10.78.252.126/32	10.78.252.126 – 10.78.252.126	10.78.252.126
128	10.78.252.127/32	10.78.252.127 – 10.78.252.127	10.78.252.127
129	10.78.252.128/32	10.78.252.128 – 10.78.252.128	10.78.252.128
130	10.78.252.129/32	10.78.252.129 – 10.78.252.129	10.78.252.129
131	10.78.252.130/32	10.78.252.130 – 10.78.252.130	10.78.252.130
132	10.78.252.131/32	10.78.252.131 – 10.78.252.131	10.78.252.131
133	10.78.252.132/32	10.78.252.132 – 10.78.252.132	10.78.252.132
134	10.78.252.133/32	10.78.252.133 – 10.78.252.133	10.78.252.133
135	10.78.252.134/32	10.78.252.134 – 10.78.252.134	10.78.252.134
136	10.78.252.135/32	10.78.252.135 – 10.78.252.135	10.78.252.135
137	10.78.252.136/32	10.78.252.136 – 10.78.252.136	10.78.252.136
138	10.78.252.137/32	10.78.252.137 – 10.78.252.137	10.78.252.137
139	10.78.252.138/32	10.78.252.138 – 10.78.252.138	10.78.252.138
140	10.78.252.139/32	10.78.252.139 – 10.78.252.139	10.78.252.139
141	10.78.252.140/32	10.78.252.140 – 10.78.252.140	10.78.252.140
142	10.78.252.141/32	10.78.252.141 – 10.78.252.141	10.78.252.141
143	10.78.252.142/32	10.78.252.142 – 10.78.252.142	10.78.252.142
144	10.78.252.143/32	10.78.252.143 – 10.78.252.143	10.78.252.143
145	10.78.252.144/32	10.78.252.144 – 10.78.252.144	10.78.252.144
146	10.78.252.145/32	10.78.252.145 – 10.78.252.145	10.78.252.145
147	10.78.252.146/32	10.78.252.146 – 10.78.252.146	10.78.252.146
148	10.78.252.147/32	10.78.252.147 – 10.78.252.147	10.78.252.147
149	10.78.252.148/32	10.78.252.148 – 10.78.252.148	10.78.252.148
150	10.78.252.149/32	10.78.252.149 – 10.78.252.149	10.78.252.149
151	10.78.252.150/32	10.78.252.150 – 10.78.252.150	10.78.252.150
152	10.78.252.151/32	10.78.252.151 – 10.78.252.151	10.78.252.151
153	10.78.252.152/32	10.78.252.152 – 10.78.252.152	10.78.252.152
154	10.78.252.153/32	10.78.252.153 – 10.78.252.153	10.78.252.153
155	10.78.252.154/32	10.78.252.154 – 10.78.252.154	10.78.252.154
156	10.78.252.155/32	10.78.252.155 – 10.78.252.155	10.78.252.155
157	10.78.252.156/32	10.78.252.156 – 10.78.252.156	10.78.252.156
158	10.78.252.157/32	10.78.252.157 – 10.78.252.157	10.78.252.157
159	10.78.252.158/32	10.78.252.158 – 10.78.252.158	10.78.252.158
160	10.78.252.159/32	10.78.252.159 – 10.78.252.159	10.78.252.159
161	10.78.252.160/32	10.78.252.160 – 10.78.252.160	10.78.252.160
162	10.78.252.161/32	10.78.252.161 – 10.78.252.161	10.78.252.161
163	10.78.252.162/32	10.78.252.162 – 10.78.252.162	10.78.252.162
164	10.78.252.163/32	10.78.252.163 – 10.78.252.163	10.78.252.163
165	10.78.252.164/32	10.78.252.164 – 10.78.252.164	10.78.252.164
166	10.78.252.165/32	10.78.252.165 – 10.78.252.165	10.78.252.165
167	10.78.252.166/32	10.78.252.166 – 10.78.252.166	10.78.252.166
168	10.78.252.167/32	10.78.252.167 – 10.78.252.167	10.78.252.167
169	10.78.252.168/32	10.78.252.168 – 10.78.252.168	10.78.252.168
170	10.78.252.169/32	10.78.252.169 – 10.78.252.169	10.78.252.169
171	10.78.252.170/32	10.78.252.170 – 10.78.252.170	10.78.252.170
172	10.78.252.171/32	10.78.252.171 – 10.78.252.171	10.78.252.171
173	10.78.252.172/32	10.78.252.172 – 10.78.252.172	10.78.252.172
174	10.78.252.173/32	10.78.252.173 – 10.78.252.173	10.78.252.173
175	10.78.252.174/32	10.78.252.174 – 10.78.252.174	10.78.252.174
176	10.78.252.175/32	10.78.252.175 – 10.78.252.175	10.78.252.175
177	10.78.252.176/32	10.78.252.176 – 10.78.252.176	10.78.252.176
178	10.78.252.177/32	10.78.252.177 – 10.78.252.177	10.78.252.177
179	10.78.252.178/32	10.78.252.178 – 10.78.252.178	10.78.252.178
180	10.78.252.179/32	10.78.252.179 – 10.78.252.179	10.78.252.179
181	10.78.252.180/32	10.78.252.180 – 10.78.252.180	10.78.252.180
182	10.78.252.181/32	10.78.252.181 – 10.78.252.181	10.78.252.181
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187	10.78.252.186/32	10.78.252.186 – 10.78.252.186	10.78.252.186
188	10.78.252.187/32	10.78.252.187 – 10.78.252.187	10.78.252.187
189	10.78.252.188/32	10.78.252.188 – 10.78.252.188	10.78.252.188
190	10.78.252.189/32	10.78.252.189 – 10.78.252.189	10.78.252.189
191	10.78.252.190/32	10.78.252.190 – 10.78.252.190	10.78.252.190
192	10.78.252.191/32	10.78.252.191 – 10.78.252.191	10.78.252.191
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194	10.78.252.193/32	10.78.252.193 – 10.78.252.193	10.78.252.193
195	10.78.252.194/32	10.78.252.194 – 10.78.252.194	10.78.252.194
196	10.78.252.195/32	10.78.252.195 – 10.78.252.195	10.78.252.195
197	10.78.252.196/32	10.78.252.196 – 10.78.252.196	10.78.252.196
198	10.78.252.197/32	10.78.252.197 – 10.78.252.197	10.78.252.197
199	10.78.252.198/32	10.78.252.198 – 10.78.252.198	10.78.252.198
200	10.78.252.199/32	10.78.252.199 – 10.78.252.199	10.78.252.199
201	10.78.252.200/32	10.78.252.200 – 10.78.252.200	10.78.252.200
202	10.78.252.201/32	10.78.252.201 – 10.78.252.201	10.78.252.201
203	10.78.252.202/32	10.78.252.202 – 10.78.252.202	10.78.252.202
204	10.78.252.203/32	10.78.252.203 – 10.78.252.203	10.78.252.203
205	10.78.252.204/32	10.78.252.204 – 10.78.252.204	10.78.252.204
206	10.78.252.205/32	10.78.252.205 – 10.78.252.205	10.78.252.205
207	10.78.252.206/32	10.78.252.206 – 10.78.252.206	10.78.252.206
208	10.78.252.207/32	10.78.252.207 – 10.78.252.207	10.78.252.207
209	10.78.252.208/32	10.78.252.208 – 10.78.252.208	10.78.252.208
210	10.78.252.209/32	10.78.252.209 – 10.78.252.209	10.78.252.209
211	10.78.252.210/32	10.78.252.210 – 10.78.252.210	10.78.252.210
212	10.78.252.211/32	10.78.252.211 – 10.78.252.211	10.78.252.211
213	10.78.252.212/32	10.78.252.212 – 10.78.252.212	10.78.252.212
214	10.78.252.213/32	10.78.252.213 – 10.78.252.213	10.78.252.213
215	10.78.252.214/32	10.78.252.214 – 10.78.252.214	10.78.252.214
216	10.78.252.215/32	10.78.252.215 – 10.78.252.215	10.78.252.215
217	10.78.252.216/32	10.78.252.216 – 10.78.252.216	10.78.252.216
218	10.78.252.217/32	10.78.252.217 – 10.78.252.217	10.78.252.217
219	10.78.252.218/32	10.78.252.218 – 10.78.252.218	10.78.252.218
220	10.78.252.219/32	10.78.252.219 – 10.78.252.219	10.78.252.219
221	10.78.252.220/32	10.78.252.220 – 10.78.252.220	10.78.252.220
222	10.78.252.221/32	10.78.252.221 – 10.78.252.221	10.78.252.221
223	10.78.252.222/32	10.78.252.222 – 10.78.252.222	10.78.252.222
224	10.78.252.223/32	10.78.252.223 – 10.78.252.223	10.78.252.223
225	10.78.252.224/32	10.78.252.224 – 10.78.252.224	10.78.252.224
226	10.78.252.225/32	10.78.252.225 – 10.78.252.225	10.78.252.225
227	10.78.252.226/32	10.78.252.226 – 10.78.252.226	10.78.252.226
228	10.78.252.227/32	10.78.252.227 – 10.78.252.227	10.78.252.227
229	10.78.252.228/32	10.78.252.228 – 10.78.252.228	10.78.252.228
230	10.78.252.229/32	10.78.252.229 – 10.78.252.229	10.78.252.229
231	10.78.252.230/32	10.78.252.230 – 10.78.252.230	10.78.252.230
232	10.78.252.231/32	10.78.252.231 – 10.78.252.231	10.78.252.231
233	10.78.252.232/32	10.78.252.232 – 10.78.252.232	10.78.252.232
234	10.78.252.233/32	10.78.252.233 – 10.78.252.233	10.78.252.233
235	10.78.252.234/32	10.78.252.234 – 10.78.252.234	10.78.252.234
236	10.78.252.235/32	10.78.252.235 – 10.78.252.235	10.78.252.235
237	10.78.252.236/32	10.78.252.236 – 10.78.252.236	10.78.252.236
238	10.78.252.237/32	10.78.252.237 – 10.78.252.237	10.78.252.237
239	10.78.252.238/32	10.78.252.238 – 10.78.252.238	10.78.252.238
240	10.78.252.239/32	10.78.252.239 – 10.78.252.239	10.78.252.239
241	10.78.252.240/32	10.78.252.240 – 10.78.252.240	10.78.252.240
242	10.78.252.241/32	10.78.252.241 – 10.78.252.241	10.78.252.241
243	10.78.252.242/32	10.78.252.242 – 10.78.252.242	10.78.252.242
244	10.78.252.243/32	10.78.252.243 – 10.78.252.243	10.78.252.243
245	10.78.252.244/32	10.78.252.244 – 10.78.252.244	10.78.252.244
246	10.78.252.245/32	10.78.252.245 – 10.78.252.245	10.78.252.245
247	10.78.252.246/32	10.78.252.246 – 10.78.252.246	10.78.252.246
248	10.78.252.247/32	10.78.252.247 – 10.78.252.247	10.78.252.247
249	10.78.252.248/32	10.78.252.248 – 10.78.252.248	10.78.252.248
250	10.78.252.249/32	10.78.252.249 – 10.78.252.249	10.78.252.249
251	10.78.252.250/32	10.78.252.250 – 10.78.252.250	10.78.252.250
252	10.78.252.251/32	10.78.252.251 – 10.78.252.251	10.78.252.251
253	10.78.252.252/32	10.78.252.252 – 10.78.252.252	10.78.252.252
254	10.78.252.253/32	10.78.252.253 – 10.78.252.253	10.78.252.253
255	10.78.252.254/32	10.78.252.254 – 10.78.252.254	10.78.252.254
256	10.78.252.255/32	10.78.252.255 – 10.78.252.255	10.78.252.255

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 →