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)10.78.79.0/24

network10.78.79.0/24

broadcast10.78.79.255

first host10.78.79.1

last host10.78.79.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.78.79.0/24

address00001010.01001110.01001111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001110.01001111.00000000

broadcast00001010.01001110.01001111.11111111

green = network part, grey = host part

hex0x0a4e4f00

decimal172904192

reverse dns0.79.78.10.in-addr.arpa

ipv4-mapped::ffff:a4e:4f00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.78.79.0/32	10.78.79.0 – 10.78.79.0	10.78.79.0
2	10.78.79.1/32	10.78.79.1 – 10.78.79.1	10.78.79.1
3	10.78.79.2/32	10.78.79.2 – 10.78.79.2	10.78.79.2
4	10.78.79.3/32	10.78.79.3 – 10.78.79.3	10.78.79.3
5	10.78.79.4/32	10.78.79.4 – 10.78.79.4	10.78.79.4
6	10.78.79.5/32	10.78.79.5 – 10.78.79.5	10.78.79.5
7	10.78.79.6/32	10.78.79.6 – 10.78.79.6	10.78.79.6
8	10.78.79.7/32	10.78.79.7 – 10.78.79.7	10.78.79.7
9	10.78.79.8/32	10.78.79.8 – 10.78.79.8	10.78.79.8
10	10.78.79.9/32	10.78.79.9 – 10.78.79.9	10.78.79.9
11	10.78.79.10/32	10.78.79.10 – 10.78.79.10	10.78.79.10
12	10.78.79.11/32	10.78.79.11 – 10.78.79.11	10.78.79.11
13	10.78.79.12/32	10.78.79.12 – 10.78.79.12	10.78.79.12
14	10.78.79.13/32	10.78.79.13 – 10.78.79.13	10.78.79.13
15	10.78.79.14/32	10.78.79.14 – 10.78.79.14	10.78.79.14
16	10.78.79.15/32	10.78.79.15 – 10.78.79.15	10.78.79.15
17	10.78.79.16/32	10.78.79.16 – 10.78.79.16	10.78.79.16
18	10.78.79.17/32	10.78.79.17 – 10.78.79.17	10.78.79.17
19	10.78.79.18/32	10.78.79.18 – 10.78.79.18	10.78.79.18
20	10.78.79.19/32	10.78.79.19 – 10.78.79.19	10.78.79.19
21	10.78.79.20/32	10.78.79.20 – 10.78.79.20	10.78.79.20
22	10.78.79.21/32	10.78.79.21 – 10.78.79.21	10.78.79.21
23	10.78.79.22/32	10.78.79.22 – 10.78.79.22	10.78.79.22
24	10.78.79.23/32	10.78.79.23 – 10.78.79.23	10.78.79.23
25	10.78.79.24/32	10.78.79.24 – 10.78.79.24	10.78.79.24
26	10.78.79.25/32	10.78.79.25 – 10.78.79.25	10.78.79.25
27	10.78.79.26/32	10.78.79.26 – 10.78.79.26	10.78.79.26
28	10.78.79.27/32	10.78.79.27 – 10.78.79.27	10.78.79.27
29	10.78.79.28/32	10.78.79.28 – 10.78.79.28	10.78.79.28
30	10.78.79.29/32	10.78.79.29 – 10.78.79.29	10.78.79.29
31	10.78.79.30/32	10.78.79.30 – 10.78.79.30	10.78.79.30
32	10.78.79.31/32	10.78.79.31 – 10.78.79.31	10.78.79.31
33	10.78.79.32/32	10.78.79.32 – 10.78.79.32	10.78.79.32
34	10.78.79.33/32	10.78.79.33 – 10.78.79.33	10.78.79.33
35	10.78.79.34/32	10.78.79.34 – 10.78.79.34	10.78.79.34
36	10.78.79.35/32	10.78.79.35 – 10.78.79.35	10.78.79.35
37	10.78.79.36/32	10.78.79.36 – 10.78.79.36	10.78.79.36
38	10.78.79.37/32	10.78.79.37 – 10.78.79.37	10.78.79.37
39	10.78.79.38/32	10.78.79.38 – 10.78.79.38	10.78.79.38
40	10.78.79.39/32	10.78.79.39 – 10.78.79.39	10.78.79.39
41	10.78.79.40/32	10.78.79.40 – 10.78.79.40	10.78.79.40
42	10.78.79.41/32	10.78.79.41 – 10.78.79.41	10.78.79.41
43	10.78.79.42/32	10.78.79.42 – 10.78.79.42	10.78.79.42
44	10.78.79.43/32	10.78.79.43 – 10.78.79.43	10.78.79.43
45	10.78.79.44/32	10.78.79.44 – 10.78.79.44	10.78.79.44
46	10.78.79.45/32	10.78.79.45 – 10.78.79.45	10.78.79.45
47	10.78.79.46/32	10.78.79.46 – 10.78.79.46	10.78.79.46
48	10.78.79.47/32	10.78.79.47 – 10.78.79.47	10.78.79.47
49	10.78.79.48/32	10.78.79.48 – 10.78.79.48	10.78.79.48
50	10.78.79.49/32	10.78.79.49 – 10.78.79.49	10.78.79.49
51	10.78.79.50/32	10.78.79.50 – 10.78.79.50	10.78.79.50
52	10.78.79.51/32	10.78.79.51 – 10.78.79.51	10.78.79.51
53	10.78.79.52/32	10.78.79.52 – 10.78.79.52	10.78.79.52
54	10.78.79.53/32	10.78.79.53 – 10.78.79.53	10.78.79.53
55	10.78.79.54/32	10.78.79.54 – 10.78.79.54	10.78.79.54
56	10.78.79.55/32	10.78.79.55 – 10.78.79.55	10.78.79.55
57	10.78.79.56/32	10.78.79.56 – 10.78.79.56	10.78.79.56
58	10.78.79.57/32	10.78.79.57 – 10.78.79.57	10.78.79.57
59	10.78.79.58/32	10.78.79.58 – 10.78.79.58	10.78.79.58
60	10.78.79.59/32	10.78.79.59 – 10.78.79.59	10.78.79.59
61	10.78.79.60/32	10.78.79.60 – 10.78.79.60	10.78.79.60
62	10.78.79.61/32	10.78.79.61 – 10.78.79.61	10.78.79.61
63	10.78.79.62/32	10.78.79.62 – 10.78.79.62	10.78.79.62
64	10.78.79.63/32	10.78.79.63 – 10.78.79.63	10.78.79.63
65	10.78.79.64/32	10.78.79.64 – 10.78.79.64	10.78.79.64
66	10.78.79.65/32	10.78.79.65 – 10.78.79.65	10.78.79.65
67	10.78.79.66/32	10.78.79.66 – 10.78.79.66	10.78.79.66
68	10.78.79.67/32	10.78.79.67 – 10.78.79.67	10.78.79.67
69	10.78.79.68/32	10.78.79.68 – 10.78.79.68	10.78.79.68
70	10.78.79.69/32	10.78.79.69 – 10.78.79.69	10.78.79.69
71	10.78.79.70/32	10.78.79.70 – 10.78.79.70	10.78.79.70
72	10.78.79.71/32	10.78.79.71 – 10.78.79.71	10.78.79.71
73	10.78.79.72/32	10.78.79.72 – 10.78.79.72	10.78.79.72
74	10.78.79.73/32	10.78.79.73 – 10.78.79.73	10.78.79.73
75	10.78.79.74/32	10.78.79.74 – 10.78.79.74	10.78.79.74
76	10.78.79.75/32	10.78.79.75 – 10.78.79.75	10.78.79.75
77	10.78.79.76/32	10.78.79.76 – 10.78.79.76	10.78.79.76
78	10.78.79.77/32	10.78.79.77 – 10.78.79.77	10.78.79.77
79	10.78.79.78/32	10.78.79.78 – 10.78.79.78	10.78.79.78
80	10.78.79.79/32	10.78.79.79 – 10.78.79.79	10.78.79.79
81	10.78.79.80/32	10.78.79.80 – 10.78.79.80	10.78.79.80
82	10.78.79.81/32	10.78.79.81 – 10.78.79.81	10.78.79.81
83	10.78.79.82/32	10.78.79.82 – 10.78.79.82	10.78.79.82
84	10.78.79.83/32	10.78.79.83 – 10.78.79.83	10.78.79.83
85	10.78.79.84/32	10.78.79.84 – 10.78.79.84	10.78.79.84
86	10.78.79.85/32	10.78.79.85 – 10.78.79.85	10.78.79.85
87	10.78.79.86/32	10.78.79.86 – 10.78.79.86	10.78.79.86
88	10.78.79.87/32	10.78.79.87 – 10.78.79.87	10.78.79.87
89	10.78.79.88/32	10.78.79.88 – 10.78.79.88	10.78.79.88
90	10.78.79.89/32	10.78.79.89 – 10.78.79.89	10.78.79.89
91	10.78.79.90/32	10.78.79.90 – 10.78.79.90	10.78.79.90
92	10.78.79.91/32	10.78.79.91 – 10.78.79.91	10.78.79.91
93	10.78.79.92/32	10.78.79.92 – 10.78.79.92	10.78.79.92
94	10.78.79.93/32	10.78.79.93 – 10.78.79.93	10.78.79.93
95	10.78.79.94/32	10.78.79.94 – 10.78.79.94	10.78.79.94
96	10.78.79.95/32	10.78.79.95 – 10.78.79.95	10.78.79.95
97	10.78.79.96/32	10.78.79.96 – 10.78.79.96	10.78.79.96
98	10.78.79.97/32	10.78.79.97 – 10.78.79.97	10.78.79.97
99	10.78.79.98/32	10.78.79.98 – 10.78.79.98	10.78.79.98
100	10.78.79.99/32	10.78.79.99 – 10.78.79.99	10.78.79.99
101	10.78.79.100/32	10.78.79.100 – 10.78.79.100	10.78.79.100
102	10.78.79.101/32	10.78.79.101 – 10.78.79.101	10.78.79.101
103	10.78.79.102/32	10.78.79.102 – 10.78.79.102	10.78.79.102
104	10.78.79.103/32	10.78.79.103 – 10.78.79.103	10.78.79.103
105	10.78.79.104/32	10.78.79.104 – 10.78.79.104	10.78.79.104
106	10.78.79.105/32	10.78.79.105 – 10.78.79.105	10.78.79.105
107	10.78.79.106/32	10.78.79.106 – 10.78.79.106	10.78.79.106
108	10.78.79.107/32	10.78.79.107 – 10.78.79.107	10.78.79.107
109	10.78.79.108/32	10.78.79.108 – 10.78.79.108	10.78.79.108
110	10.78.79.109/32	10.78.79.109 – 10.78.79.109	10.78.79.109
111	10.78.79.110/32	10.78.79.110 – 10.78.79.110	10.78.79.110
112	10.78.79.111/32	10.78.79.111 – 10.78.79.111	10.78.79.111
113	10.78.79.112/32	10.78.79.112 – 10.78.79.112	10.78.79.112
114	10.78.79.113/32	10.78.79.113 – 10.78.79.113	10.78.79.113
115	10.78.79.114/32	10.78.79.114 – 10.78.79.114	10.78.79.114
116	10.78.79.115/32	10.78.79.115 – 10.78.79.115	10.78.79.115
117	10.78.79.116/32	10.78.79.116 – 10.78.79.116	10.78.79.116
118	10.78.79.117/32	10.78.79.117 – 10.78.79.117	10.78.79.117
119	10.78.79.118/32	10.78.79.118 – 10.78.79.118	10.78.79.118
120	10.78.79.119/32	10.78.79.119 – 10.78.79.119	10.78.79.119
121	10.78.79.120/32	10.78.79.120 – 10.78.79.120	10.78.79.120
122	10.78.79.121/32	10.78.79.121 – 10.78.79.121	10.78.79.121
123	10.78.79.122/32	10.78.79.122 – 10.78.79.122	10.78.79.122
124	10.78.79.123/32	10.78.79.123 – 10.78.79.123	10.78.79.123
125	10.78.79.124/32	10.78.79.124 – 10.78.79.124	10.78.79.124
126	10.78.79.125/32	10.78.79.125 – 10.78.79.125	10.78.79.125
127	10.78.79.126/32	10.78.79.126 – 10.78.79.126	10.78.79.126
128	10.78.79.127/32	10.78.79.127 – 10.78.79.127	10.78.79.127
129	10.78.79.128/32	10.78.79.128 – 10.78.79.128	10.78.79.128
130	10.78.79.129/32	10.78.79.129 – 10.78.79.129	10.78.79.129
131	10.78.79.130/32	10.78.79.130 – 10.78.79.130	10.78.79.130
132	10.78.79.131/32	10.78.79.131 – 10.78.79.131	10.78.79.131
133	10.78.79.132/32	10.78.79.132 – 10.78.79.132	10.78.79.132
134	10.78.79.133/32	10.78.79.133 – 10.78.79.133	10.78.79.133
135	10.78.79.134/32	10.78.79.134 – 10.78.79.134	10.78.79.134
136	10.78.79.135/32	10.78.79.135 – 10.78.79.135	10.78.79.135
137	10.78.79.136/32	10.78.79.136 – 10.78.79.136	10.78.79.136
138	10.78.79.137/32	10.78.79.137 – 10.78.79.137	10.78.79.137
139	10.78.79.138/32	10.78.79.138 – 10.78.79.138	10.78.79.138
140	10.78.79.139/32	10.78.79.139 – 10.78.79.139	10.78.79.139
141	10.78.79.140/32	10.78.79.140 – 10.78.79.140	10.78.79.140
142	10.78.79.141/32	10.78.79.141 – 10.78.79.141	10.78.79.141
143	10.78.79.142/32	10.78.79.142 – 10.78.79.142	10.78.79.142
144	10.78.79.143/32	10.78.79.143 – 10.78.79.143	10.78.79.143
145	10.78.79.144/32	10.78.79.144 – 10.78.79.144	10.78.79.144
146	10.78.79.145/32	10.78.79.145 – 10.78.79.145	10.78.79.145
147	10.78.79.146/32	10.78.79.146 – 10.78.79.146	10.78.79.146
148	10.78.79.147/32	10.78.79.147 – 10.78.79.147	10.78.79.147
149	10.78.79.148/32	10.78.79.148 – 10.78.79.148	10.78.79.148
150	10.78.79.149/32	10.78.79.149 – 10.78.79.149	10.78.79.149
151	10.78.79.150/32	10.78.79.150 – 10.78.79.150	10.78.79.150
152	10.78.79.151/32	10.78.79.151 – 10.78.79.151	10.78.79.151
153	10.78.79.152/32	10.78.79.152 – 10.78.79.152	10.78.79.152
154	10.78.79.153/32	10.78.79.153 – 10.78.79.153	10.78.79.153
155	10.78.79.154/32	10.78.79.154 – 10.78.79.154	10.78.79.154
156	10.78.79.155/32	10.78.79.155 – 10.78.79.155	10.78.79.155
157	10.78.79.156/32	10.78.79.156 – 10.78.79.156	10.78.79.156
158	10.78.79.157/32	10.78.79.157 – 10.78.79.157	10.78.79.157
159	10.78.79.158/32	10.78.79.158 – 10.78.79.158	10.78.79.158
160	10.78.79.159/32	10.78.79.159 – 10.78.79.159	10.78.79.159
161	10.78.79.160/32	10.78.79.160 – 10.78.79.160	10.78.79.160
162	10.78.79.161/32	10.78.79.161 – 10.78.79.161	10.78.79.161
163	10.78.79.162/32	10.78.79.162 – 10.78.79.162	10.78.79.162
164	10.78.79.163/32	10.78.79.163 – 10.78.79.163	10.78.79.163
165	10.78.79.164/32	10.78.79.164 – 10.78.79.164	10.78.79.164
166	10.78.79.165/32	10.78.79.165 – 10.78.79.165	10.78.79.165
167	10.78.79.166/32	10.78.79.166 – 10.78.79.166	10.78.79.166
168	10.78.79.167/32	10.78.79.167 – 10.78.79.167	10.78.79.167
169	10.78.79.168/32	10.78.79.168 – 10.78.79.168	10.78.79.168
170	10.78.79.169/32	10.78.79.169 – 10.78.79.169	10.78.79.169
171	10.78.79.170/32	10.78.79.170 – 10.78.79.170	10.78.79.170
172	10.78.79.171/32	10.78.79.171 – 10.78.79.171	10.78.79.171
173	10.78.79.172/32	10.78.79.172 – 10.78.79.172	10.78.79.172
174	10.78.79.173/32	10.78.79.173 – 10.78.79.173	10.78.79.173
175	10.78.79.174/32	10.78.79.174 – 10.78.79.174	10.78.79.174
176	10.78.79.175/32	10.78.79.175 – 10.78.79.175	10.78.79.175
177	10.78.79.176/32	10.78.79.176 – 10.78.79.176	10.78.79.176
178	10.78.79.177/32	10.78.79.177 – 10.78.79.177	10.78.79.177
179	10.78.79.178/32	10.78.79.178 – 10.78.79.178	10.78.79.178
180	10.78.79.179/32	10.78.79.179 – 10.78.79.179	10.78.79.179
181	10.78.79.180/32	10.78.79.180 – 10.78.79.180	10.78.79.180
182	10.78.79.181/32	10.78.79.181 – 10.78.79.181	10.78.79.181
183	10.78.79.182/32	10.78.79.182 – 10.78.79.182	10.78.79.182
184	10.78.79.183/32	10.78.79.183 – 10.78.79.183	10.78.79.183
185	10.78.79.184/32	10.78.79.184 – 10.78.79.184	10.78.79.184
186	10.78.79.185/32	10.78.79.185 – 10.78.79.185	10.78.79.185
187	10.78.79.186/32	10.78.79.186 – 10.78.79.186	10.78.79.186
188	10.78.79.187/32	10.78.79.187 – 10.78.79.187	10.78.79.187
189	10.78.79.188/32	10.78.79.188 – 10.78.79.188	10.78.79.188
190	10.78.79.189/32	10.78.79.189 – 10.78.79.189	10.78.79.189
191	10.78.79.190/32	10.78.79.190 – 10.78.79.190	10.78.79.190
192	10.78.79.191/32	10.78.79.191 – 10.78.79.191	10.78.79.191
193	10.78.79.192/32	10.78.79.192 – 10.78.79.192	10.78.79.192
194	10.78.79.193/32	10.78.79.193 – 10.78.79.193	10.78.79.193
195	10.78.79.194/32	10.78.79.194 – 10.78.79.194	10.78.79.194
196	10.78.79.195/32	10.78.79.195 – 10.78.79.195	10.78.79.195
197	10.78.79.196/32	10.78.79.196 – 10.78.79.196	10.78.79.196
198	10.78.79.197/32	10.78.79.197 – 10.78.79.197	10.78.79.197
199	10.78.79.198/32	10.78.79.198 – 10.78.79.198	10.78.79.198
200	10.78.79.199/32	10.78.79.199 – 10.78.79.199	10.78.79.199
201	10.78.79.200/32	10.78.79.200 – 10.78.79.200	10.78.79.200
202	10.78.79.201/32	10.78.79.201 – 10.78.79.201	10.78.79.201
203	10.78.79.202/32	10.78.79.202 – 10.78.79.202	10.78.79.202
204	10.78.79.203/32	10.78.79.203 – 10.78.79.203	10.78.79.203
205	10.78.79.204/32	10.78.79.204 – 10.78.79.204	10.78.79.204
206	10.78.79.205/32	10.78.79.205 – 10.78.79.205	10.78.79.205
207	10.78.79.206/32	10.78.79.206 – 10.78.79.206	10.78.79.206
208	10.78.79.207/32	10.78.79.207 – 10.78.79.207	10.78.79.207
209	10.78.79.208/32	10.78.79.208 – 10.78.79.208	10.78.79.208
210	10.78.79.209/32	10.78.79.209 – 10.78.79.209	10.78.79.209
211	10.78.79.210/32	10.78.79.210 – 10.78.79.210	10.78.79.210
212	10.78.79.211/32	10.78.79.211 – 10.78.79.211	10.78.79.211
213	10.78.79.212/32	10.78.79.212 – 10.78.79.212	10.78.79.212
214	10.78.79.213/32	10.78.79.213 – 10.78.79.213	10.78.79.213
215	10.78.79.214/32	10.78.79.214 – 10.78.79.214	10.78.79.214
216	10.78.79.215/32	10.78.79.215 – 10.78.79.215	10.78.79.215
217	10.78.79.216/32	10.78.79.216 – 10.78.79.216	10.78.79.216
218	10.78.79.217/32	10.78.79.217 – 10.78.79.217	10.78.79.217
219	10.78.79.218/32	10.78.79.218 – 10.78.79.218	10.78.79.218
220	10.78.79.219/32	10.78.79.219 – 10.78.79.219	10.78.79.219
221	10.78.79.220/32	10.78.79.220 – 10.78.79.220	10.78.79.220
222	10.78.79.221/32	10.78.79.221 – 10.78.79.221	10.78.79.221
223	10.78.79.222/32	10.78.79.222 – 10.78.79.222	10.78.79.222
224	10.78.79.223/32	10.78.79.223 – 10.78.79.223	10.78.79.223
225	10.78.79.224/32	10.78.79.224 – 10.78.79.224	10.78.79.224
226	10.78.79.225/32	10.78.79.225 – 10.78.79.225	10.78.79.225
227	10.78.79.226/32	10.78.79.226 – 10.78.79.226	10.78.79.226
228	10.78.79.227/32	10.78.79.227 – 10.78.79.227	10.78.79.227
229	10.78.79.228/32	10.78.79.228 – 10.78.79.228	10.78.79.228
230	10.78.79.229/32	10.78.79.229 – 10.78.79.229	10.78.79.229
231	10.78.79.230/32	10.78.79.230 – 10.78.79.230	10.78.79.230
232	10.78.79.231/32	10.78.79.231 – 10.78.79.231	10.78.79.231
233	10.78.79.232/32	10.78.79.232 – 10.78.79.232	10.78.79.232
234	10.78.79.233/32	10.78.79.233 – 10.78.79.233	10.78.79.233
235	10.78.79.234/32	10.78.79.234 – 10.78.79.234	10.78.79.234
236	10.78.79.235/32	10.78.79.235 – 10.78.79.235	10.78.79.235
237	10.78.79.236/32	10.78.79.236 – 10.78.79.236	10.78.79.236
238	10.78.79.237/32	10.78.79.237 – 10.78.79.237	10.78.79.237
239	10.78.79.238/32	10.78.79.238 – 10.78.79.238	10.78.79.238
240	10.78.79.239/32	10.78.79.239 – 10.78.79.239	10.78.79.239
241	10.78.79.240/32	10.78.79.240 – 10.78.79.240	10.78.79.240
242	10.78.79.241/32	10.78.79.241 – 10.78.79.241	10.78.79.241
243	10.78.79.242/32	10.78.79.242 – 10.78.79.242	10.78.79.242
244	10.78.79.243/32	10.78.79.243 – 10.78.79.243	10.78.79.243
245	10.78.79.244/32	10.78.79.244 – 10.78.79.244	10.78.79.244
246	10.78.79.245/32	10.78.79.245 – 10.78.79.245	10.78.79.245
247	10.78.79.246/32	10.78.79.246 – 10.78.79.246	10.78.79.246
248	10.78.79.247/32	10.78.79.247 – 10.78.79.247	10.78.79.247
249	10.78.79.248/32	10.78.79.248 – 10.78.79.248	10.78.79.248
250	10.78.79.249/32	10.78.79.249 – 10.78.79.249	10.78.79.249
251	10.78.79.250/32	10.78.79.250 – 10.78.79.250	10.78.79.250
252	10.78.79.251/32	10.78.79.251 – 10.78.79.251	10.78.79.251
253	10.78.79.252/32	10.78.79.252 – 10.78.79.252	10.78.79.252
254	10.78.79.253/32	10.78.79.253 – 10.78.79.253	10.78.79.253
255	10.78.79.254/32	10.78.79.254 – 10.78.79.254	10.78.79.254
256	10.78.79.255/32	10.78.79.255 – 10.78.79.255	10.78.79.255

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 →