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)10.76.115.0/24

network10.76.115.0/24

broadcast10.76.115.255

first host10.76.115.1

last host10.76.115.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.76.115.0/24

address00001010.01001100.01110011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001100.01110011.00000000

broadcast00001010.01001100.01110011.11111111

green = network part, grey = host part

hex0x0a4c7300

decimal172782336

reverse dns0.115.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:7300

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.76.115.0/32	10.76.115.0 – 10.76.115.0	10.76.115.0
2	10.76.115.1/32	10.76.115.1 – 10.76.115.1	10.76.115.1
3	10.76.115.2/32	10.76.115.2 – 10.76.115.2	10.76.115.2
4	10.76.115.3/32	10.76.115.3 – 10.76.115.3	10.76.115.3
5	10.76.115.4/32	10.76.115.4 – 10.76.115.4	10.76.115.4
6	10.76.115.5/32	10.76.115.5 – 10.76.115.5	10.76.115.5
7	10.76.115.6/32	10.76.115.6 – 10.76.115.6	10.76.115.6
8	10.76.115.7/32	10.76.115.7 – 10.76.115.7	10.76.115.7
9	10.76.115.8/32	10.76.115.8 – 10.76.115.8	10.76.115.8
10	10.76.115.9/32	10.76.115.9 – 10.76.115.9	10.76.115.9
11	10.76.115.10/32	10.76.115.10 – 10.76.115.10	10.76.115.10
12	10.76.115.11/32	10.76.115.11 – 10.76.115.11	10.76.115.11
13	10.76.115.12/32	10.76.115.12 – 10.76.115.12	10.76.115.12
14	10.76.115.13/32	10.76.115.13 – 10.76.115.13	10.76.115.13
15	10.76.115.14/32	10.76.115.14 – 10.76.115.14	10.76.115.14
16	10.76.115.15/32	10.76.115.15 – 10.76.115.15	10.76.115.15
17	10.76.115.16/32	10.76.115.16 – 10.76.115.16	10.76.115.16
18	10.76.115.17/32	10.76.115.17 – 10.76.115.17	10.76.115.17
19	10.76.115.18/32	10.76.115.18 – 10.76.115.18	10.76.115.18
20	10.76.115.19/32	10.76.115.19 – 10.76.115.19	10.76.115.19
21	10.76.115.20/32	10.76.115.20 – 10.76.115.20	10.76.115.20
22	10.76.115.21/32	10.76.115.21 – 10.76.115.21	10.76.115.21
23	10.76.115.22/32	10.76.115.22 – 10.76.115.22	10.76.115.22
24	10.76.115.23/32	10.76.115.23 – 10.76.115.23	10.76.115.23
25	10.76.115.24/32	10.76.115.24 – 10.76.115.24	10.76.115.24
26	10.76.115.25/32	10.76.115.25 – 10.76.115.25	10.76.115.25
27	10.76.115.26/32	10.76.115.26 – 10.76.115.26	10.76.115.26
28	10.76.115.27/32	10.76.115.27 – 10.76.115.27	10.76.115.27
29	10.76.115.28/32	10.76.115.28 – 10.76.115.28	10.76.115.28
30	10.76.115.29/32	10.76.115.29 – 10.76.115.29	10.76.115.29
31	10.76.115.30/32	10.76.115.30 – 10.76.115.30	10.76.115.30
32	10.76.115.31/32	10.76.115.31 – 10.76.115.31	10.76.115.31
33	10.76.115.32/32	10.76.115.32 – 10.76.115.32	10.76.115.32
34	10.76.115.33/32	10.76.115.33 – 10.76.115.33	10.76.115.33
35	10.76.115.34/32	10.76.115.34 – 10.76.115.34	10.76.115.34
36	10.76.115.35/32	10.76.115.35 – 10.76.115.35	10.76.115.35
37	10.76.115.36/32	10.76.115.36 – 10.76.115.36	10.76.115.36
38	10.76.115.37/32	10.76.115.37 – 10.76.115.37	10.76.115.37
39	10.76.115.38/32	10.76.115.38 – 10.76.115.38	10.76.115.38
40	10.76.115.39/32	10.76.115.39 – 10.76.115.39	10.76.115.39
41	10.76.115.40/32	10.76.115.40 – 10.76.115.40	10.76.115.40
42	10.76.115.41/32	10.76.115.41 – 10.76.115.41	10.76.115.41
43	10.76.115.42/32	10.76.115.42 – 10.76.115.42	10.76.115.42
44	10.76.115.43/32	10.76.115.43 – 10.76.115.43	10.76.115.43
45	10.76.115.44/32	10.76.115.44 – 10.76.115.44	10.76.115.44
46	10.76.115.45/32	10.76.115.45 – 10.76.115.45	10.76.115.45
47	10.76.115.46/32	10.76.115.46 – 10.76.115.46	10.76.115.46
48	10.76.115.47/32	10.76.115.47 – 10.76.115.47	10.76.115.47
49	10.76.115.48/32	10.76.115.48 – 10.76.115.48	10.76.115.48
50	10.76.115.49/32	10.76.115.49 – 10.76.115.49	10.76.115.49
51	10.76.115.50/32	10.76.115.50 – 10.76.115.50	10.76.115.50
52	10.76.115.51/32	10.76.115.51 – 10.76.115.51	10.76.115.51
53	10.76.115.52/32	10.76.115.52 – 10.76.115.52	10.76.115.52
54	10.76.115.53/32	10.76.115.53 – 10.76.115.53	10.76.115.53
55	10.76.115.54/32	10.76.115.54 – 10.76.115.54	10.76.115.54
56	10.76.115.55/32	10.76.115.55 – 10.76.115.55	10.76.115.55
57	10.76.115.56/32	10.76.115.56 – 10.76.115.56	10.76.115.56
58	10.76.115.57/32	10.76.115.57 – 10.76.115.57	10.76.115.57
59	10.76.115.58/32	10.76.115.58 – 10.76.115.58	10.76.115.58
60	10.76.115.59/32	10.76.115.59 – 10.76.115.59	10.76.115.59
61	10.76.115.60/32	10.76.115.60 – 10.76.115.60	10.76.115.60
62	10.76.115.61/32	10.76.115.61 – 10.76.115.61	10.76.115.61
63	10.76.115.62/32	10.76.115.62 – 10.76.115.62	10.76.115.62
64	10.76.115.63/32	10.76.115.63 – 10.76.115.63	10.76.115.63
65	10.76.115.64/32	10.76.115.64 – 10.76.115.64	10.76.115.64
66	10.76.115.65/32	10.76.115.65 – 10.76.115.65	10.76.115.65
67	10.76.115.66/32	10.76.115.66 – 10.76.115.66	10.76.115.66
68	10.76.115.67/32	10.76.115.67 – 10.76.115.67	10.76.115.67
69	10.76.115.68/32	10.76.115.68 – 10.76.115.68	10.76.115.68
70	10.76.115.69/32	10.76.115.69 – 10.76.115.69	10.76.115.69
71	10.76.115.70/32	10.76.115.70 – 10.76.115.70	10.76.115.70
72	10.76.115.71/32	10.76.115.71 – 10.76.115.71	10.76.115.71
73	10.76.115.72/32	10.76.115.72 – 10.76.115.72	10.76.115.72
74	10.76.115.73/32	10.76.115.73 – 10.76.115.73	10.76.115.73
75	10.76.115.74/32	10.76.115.74 – 10.76.115.74	10.76.115.74
76	10.76.115.75/32	10.76.115.75 – 10.76.115.75	10.76.115.75
77	10.76.115.76/32	10.76.115.76 – 10.76.115.76	10.76.115.76
78	10.76.115.77/32	10.76.115.77 – 10.76.115.77	10.76.115.77
79	10.76.115.78/32	10.76.115.78 – 10.76.115.78	10.76.115.78
80	10.76.115.79/32	10.76.115.79 – 10.76.115.79	10.76.115.79
81	10.76.115.80/32	10.76.115.80 – 10.76.115.80	10.76.115.80
82	10.76.115.81/32	10.76.115.81 – 10.76.115.81	10.76.115.81
83	10.76.115.82/32	10.76.115.82 – 10.76.115.82	10.76.115.82
84	10.76.115.83/32	10.76.115.83 – 10.76.115.83	10.76.115.83
85	10.76.115.84/32	10.76.115.84 – 10.76.115.84	10.76.115.84
86	10.76.115.85/32	10.76.115.85 – 10.76.115.85	10.76.115.85
87	10.76.115.86/32	10.76.115.86 – 10.76.115.86	10.76.115.86
88	10.76.115.87/32	10.76.115.87 – 10.76.115.87	10.76.115.87
89	10.76.115.88/32	10.76.115.88 – 10.76.115.88	10.76.115.88
90	10.76.115.89/32	10.76.115.89 – 10.76.115.89	10.76.115.89
91	10.76.115.90/32	10.76.115.90 – 10.76.115.90	10.76.115.90
92	10.76.115.91/32	10.76.115.91 – 10.76.115.91	10.76.115.91
93	10.76.115.92/32	10.76.115.92 – 10.76.115.92	10.76.115.92
94	10.76.115.93/32	10.76.115.93 – 10.76.115.93	10.76.115.93
95	10.76.115.94/32	10.76.115.94 – 10.76.115.94	10.76.115.94
96	10.76.115.95/32	10.76.115.95 – 10.76.115.95	10.76.115.95
97	10.76.115.96/32	10.76.115.96 – 10.76.115.96	10.76.115.96
98	10.76.115.97/32	10.76.115.97 – 10.76.115.97	10.76.115.97
99	10.76.115.98/32	10.76.115.98 – 10.76.115.98	10.76.115.98
100	10.76.115.99/32	10.76.115.99 – 10.76.115.99	10.76.115.99
101	10.76.115.100/32	10.76.115.100 – 10.76.115.100	10.76.115.100
102	10.76.115.101/32	10.76.115.101 – 10.76.115.101	10.76.115.101
103	10.76.115.102/32	10.76.115.102 – 10.76.115.102	10.76.115.102
104	10.76.115.103/32	10.76.115.103 – 10.76.115.103	10.76.115.103
105	10.76.115.104/32	10.76.115.104 – 10.76.115.104	10.76.115.104
106	10.76.115.105/32	10.76.115.105 – 10.76.115.105	10.76.115.105
107	10.76.115.106/32	10.76.115.106 – 10.76.115.106	10.76.115.106
108	10.76.115.107/32	10.76.115.107 – 10.76.115.107	10.76.115.107
109	10.76.115.108/32	10.76.115.108 – 10.76.115.108	10.76.115.108
110	10.76.115.109/32	10.76.115.109 – 10.76.115.109	10.76.115.109
111	10.76.115.110/32	10.76.115.110 – 10.76.115.110	10.76.115.110
112	10.76.115.111/32	10.76.115.111 – 10.76.115.111	10.76.115.111
113	10.76.115.112/32	10.76.115.112 – 10.76.115.112	10.76.115.112
114	10.76.115.113/32	10.76.115.113 – 10.76.115.113	10.76.115.113
115	10.76.115.114/32	10.76.115.114 – 10.76.115.114	10.76.115.114
116	10.76.115.115/32	10.76.115.115 – 10.76.115.115	10.76.115.115
117	10.76.115.116/32	10.76.115.116 – 10.76.115.116	10.76.115.116
118	10.76.115.117/32	10.76.115.117 – 10.76.115.117	10.76.115.117
119	10.76.115.118/32	10.76.115.118 – 10.76.115.118	10.76.115.118
120	10.76.115.119/32	10.76.115.119 – 10.76.115.119	10.76.115.119
121	10.76.115.120/32	10.76.115.120 – 10.76.115.120	10.76.115.120
122	10.76.115.121/32	10.76.115.121 – 10.76.115.121	10.76.115.121
123	10.76.115.122/32	10.76.115.122 – 10.76.115.122	10.76.115.122
124	10.76.115.123/32	10.76.115.123 – 10.76.115.123	10.76.115.123
125	10.76.115.124/32	10.76.115.124 – 10.76.115.124	10.76.115.124
126	10.76.115.125/32	10.76.115.125 – 10.76.115.125	10.76.115.125
127	10.76.115.126/32	10.76.115.126 – 10.76.115.126	10.76.115.126
128	10.76.115.127/32	10.76.115.127 – 10.76.115.127	10.76.115.127
129	10.76.115.128/32	10.76.115.128 – 10.76.115.128	10.76.115.128
130	10.76.115.129/32	10.76.115.129 – 10.76.115.129	10.76.115.129
131	10.76.115.130/32	10.76.115.130 – 10.76.115.130	10.76.115.130
132	10.76.115.131/32	10.76.115.131 – 10.76.115.131	10.76.115.131
133	10.76.115.132/32	10.76.115.132 – 10.76.115.132	10.76.115.132
134	10.76.115.133/32	10.76.115.133 – 10.76.115.133	10.76.115.133
135	10.76.115.134/32	10.76.115.134 – 10.76.115.134	10.76.115.134
136	10.76.115.135/32	10.76.115.135 – 10.76.115.135	10.76.115.135
137	10.76.115.136/32	10.76.115.136 – 10.76.115.136	10.76.115.136
138	10.76.115.137/32	10.76.115.137 – 10.76.115.137	10.76.115.137
139	10.76.115.138/32	10.76.115.138 – 10.76.115.138	10.76.115.138
140	10.76.115.139/32	10.76.115.139 – 10.76.115.139	10.76.115.139
141	10.76.115.140/32	10.76.115.140 – 10.76.115.140	10.76.115.140
142	10.76.115.141/32	10.76.115.141 – 10.76.115.141	10.76.115.141
143	10.76.115.142/32	10.76.115.142 – 10.76.115.142	10.76.115.142
144	10.76.115.143/32	10.76.115.143 – 10.76.115.143	10.76.115.143
145	10.76.115.144/32	10.76.115.144 – 10.76.115.144	10.76.115.144
146	10.76.115.145/32	10.76.115.145 – 10.76.115.145	10.76.115.145
147	10.76.115.146/32	10.76.115.146 – 10.76.115.146	10.76.115.146
148	10.76.115.147/32	10.76.115.147 – 10.76.115.147	10.76.115.147
149	10.76.115.148/32	10.76.115.148 – 10.76.115.148	10.76.115.148
150	10.76.115.149/32	10.76.115.149 – 10.76.115.149	10.76.115.149
151	10.76.115.150/32	10.76.115.150 – 10.76.115.150	10.76.115.150
152	10.76.115.151/32	10.76.115.151 – 10.76.115.151	10.76.115.151
153	10.76.115.152/32	10.76.115.152 – 10.76.115.152	10.76.115.152
154	10.76.115.153/32	10.76.115.153 – 10.76.115.153	10.76.115.153
155	10.76.115.154/32	10.76.115.154 – 10.76.115.154	10.76.115.154
156	10.76.115.155/32	10.76.115.155 – 10.76.115.155	10.76.115.155
157	10.76.115.156/32	10.76.115.156 – 10.76.115.156	10.76.115.156
158	10.76.115.157/32	10.76.115.157 – 10.76.115.157	10.76.115.157
159	10.76.115.158/32	10.76.115.158 – 10.76.115.158	10.76.115.158
160	10.76.115.159/32	10.76.115.159 – 10.76.115.159	10.76.115.159
161	10.76.115.160/32	10.76.115.160 – 10.76.115.160	10.76.115.160
162	10.76.115.161/32	10.76.115.161 – 10.76.115.161	10.76.115.161
163	10.76.115.162/32	10.76.115.162 – 10.76.115.162	10.76.115.162
164	10.76.115.163/32	10.76.115.163 – 10.76.115.163	10.76.115.163
165	10.76.115.164/32	10.76.115.164 – 10.76.115.164	10.76.115.164
166	10.76.115.165/32	10.76.115.165 – 10.76.115.165	10.76.115.165
167	10.76.115.166/32	10.76.115.166 – 10.76.115.166	10.76.115.166
168	10.76.115.167/32	10.76.115.167 – 10.76.115.167	10.76.115.167
169	10.76.115.168/32	10.76.115.168 – 10.76.115.168	10.76.115.168
170	10.76.115.169/32	10.76.115.169 – 10.76.115.169	10.76.115.169
171	10.76.115.170/32	10.76.115.170 – 10.76.115.170	10.76.115.170
172	10.76.115.171/32	10.76.115.171 – 10.76.115.171	10.76.115.171
173	10.76.115.172/32	10.76.115.172 – 10.76.115.172	10.76.115.172
174	10.76.115.173/32	10.76.115.173 – 10.76.115.173	10.76.115.173
175	10.76.115.174/32	10.76.115.174 – 10.76.115.174	10.76.115.174
176	10.76.115.175/32	10.76.115.175 – 10.76.115.175	10.76.115.175
177	10.76.115.176/32	10.76.115.176 – 10.76.115.176	10.76.115.176
178	10.76.115.177/32	10.76.115.177 – 10.76.115.177	10.76.115.177
179	10.76.115.178/32	10.76.115.178 – 10.76.115.178	10.76.115.178
180	10.76.115.179/32	10.76.115.179 – 10.76.115.179	10.76.115.179
181	10.76.115.180/32	10.76.115.180 – 10.76.115.180	10.76.115.180
182	10.76.115.181/32	10.76.115.181 – 10.76.115.181	10.76.115.181
183	10.76.115.182/32	10.76.115.182 – 10.76.115.182	10.76.115.182
184	10.76.115.183/32	10.76.115.183 – 10.76.115.183	10.76.115.183
185	10.76.115.184/32	10.76.115.184 – 10.76.115.184	10.76.115.184
186	10.76.115.185/32	10.76.115.185 – 10.76.115.185	10.76.115.185
187	10.76.115.186/32	10.76.115.186 – 10.76.115.186	10.76.115.186
188	10.76.115.187/32	10.76.115.187 – 10.76.115.187	10.76.115.187
189	10.76.115.188/32	10.76.115.188 – 10.76.115.188	10.76.115.188
190	10.76.115.189/32	10.76.115.189 – 10.76.115.189	10.76.115.189
191	10.76.115.190/32	10.76.115.190 – 10.76.115.190	10.76.115.190
192	10.76.115.191/32	10.76.115.191 – 10.76.115.191	10.76.115.191
193	10.76.115.192/32	10.76.115.192 – 10.76.115.192	10.76.115.192
194	10.76.115.193/32	10.76.115.193 – 10.76.115.193	10.76.115.193
195	10.76.115.194/32	10.76.115.194 – 10.76.115.194	10.76.115.194
196	10.76.115.195/32	10.76.115.195 – 10.76.115.195	10.76.115.195
197	10.76.115.196/32	10.76.115.196 – 10.76.115.196	10.76.115.196
198	10.76.115.197/32	10.76.115.197 – 10.76.115.197	10.76.115.197
199	10.76.115.198/32	10.76.115.198 – 10.76.115.198	10.76.115.198
200	10.76.115.199/32	10.76.115.199 – 10.76.115.199	10.76.115.199
201	10.76.115.200/32	10.76.115.200 – 10.76.115.200	10.76.115.200
202	10.76.115.201/32	10.76.115.201 – 10.76.115.201	10.76.115.201
203	10.76.115.202/32	10.76.115.202 – 10.76.115.202	10.76.115.202
204	10.76.115.203/32	10.76.115.203 – 10.76.115.203	10.76.115.203
205	10.76.115.204/32	10.76.115.204 – 10.76.115.204	10.76.115.204
206	10.76.115.205/32	10.76.115.205 – 10.76.115.205	10.76.115.205
207	10.76.115.206/32	10.76.115.206 – 10.76.115.206	10.76.115.206
208	10.76.115.207/32	10.76.115.207 – 10.76.115.207	10.76.115.207
209	10.76.115.208/32	10.76.115.208 – 10.76.115.208	10.76.115.208
210	10.76.115.209/32	10.76.115.209 – 10.76.115.209	10.76.115.209
211	10.76.115.210/32	10.76.115.210 – 10.76.115.210	10.76.115.210
212	10.76.115.211/32	10.76.115.211 – 10.76.115.211	10.76.115.211
213	10.76.115.212/32	10.76.115.212 – 10.76.115.212	10.76.115.212
214	10.76.115.213/32	10.76.115.213 – 10.76.115.213	10.76.115.213
215	10.76.115.214/32	10.76.115.214 – 10.76.115.214	10.76.115.214
216	10.76.115.215/32	10.76.115.215 – 10.76.115.215	10.76.115.215
217	10.76.115.216/32	10.76.115.216 – 10.76.115.216	10.76.115.216
218	10.76.115.217/32	10.76.115.217 – 10.76.115.217	10.76.115.217
219	10.76.115.218/32	10.76.115.218 – 10.76.115.218	10.76.115.218
220	10.76.115.219/32	10.76.115.219 – 10.76.115.219	10.76.115.219
221	10.76.115.220/32	10.76.115.220 – 10.76.115.220	10.76.115.220
222	10.76.115.221/32	10.76.115.221 – 10.76.115.221	10.76.115.221
223	10.76.115.222/32	10.76.115.222 – 10.76.115.222	10.76.115.222
224	10.76.115.223/32	10.76.115.223 – 10.76.115.223	10.76.115.223
225	10.76.115.224/32	10.76.115.224 – 10.76.115.224	10.76.115.224
226	10.76.115.225/32	10.76.115.225 – 10.76.115.225	10.76.115.225
227	10.76.115.226/32	10.76.115.226 – 10.76.115.226	10.76.115.226
228	10.76.115.227/32	10.76.115.227 – 10.76.115.227	10.76.115.227
229	10.76.115.228/32	10.76.115.228 – 10.76.115.228	10.76.115.228
230	10.76.115.229/32	10.76.115.229 – 10.76.115.229	10.76.115.229
231	10.76.115.230/32	10.76.115.230 – 10.76.115.230	10.76.115.230
232	10.76.115.231/32	10.76.115.231 – 10.76.115.231	10.76.115.231
233	10.76.115.232/32	10.76.115.232 – 10.76.115.232	10.76.115.232
234	10.76.115.233/32	10.76.115.233 – 10.76.115.233	10.76.115.233
235	10.76.115.234/32	10.76.115.234 – 10.76.115.234	10.76.115.234
236	10.76.115.235/32	10.76.115.235 – 10.76.115.235	10.76.115.235
237	10.76.115.236/32	10.76.115.236 – 10.76.115.236	10.76.115.236
238	10.76.115.237/32	10.76.115.237 – 10.76.115.237	10.76.115.237
239	10.76.115.238/32	10.76.115.238 – 10.76.115.238	10.76.115.238
240	10.76.115.239/32	10.76.115.239 – 10.76.115.239	10.76.115.239
241	10.76.115.240/32	10.76.115.240 – 10.76.115.240	10.76.115.240
242	10.76.115.241/32	10.76.115.241 – 10.76.115.241	10.76.115.241
243	10.76.115.242/32	10.76.115.242 – 10.76.115.242	10.76.115.242
244	10.76.115.243/32	10.76.115.243 – 10.76.115.243	10.76.115.243
245	10.76.115.244/32	10.76.115.244 – 10.76.115.244	10.76.115.244
246	10.76.115.245/32	10.76.115.245 – 10.76.115.245	10.76.115.245
247	10.76.115.246/32	10.76.115.246 – 10.76.115.246	10.76.115.246
248	10.76.115.247/32	10.76.115.247 – 10.76.115.247	10.76.115.247
249	10.76.115.248/32	10.76.115.248 – 10.76.115.248	10.76.115.248
250	10.76.115.249/32	10.76.115.249 – 10.76.115.249	10.76.115.249
251	10.76.115.250/32	10.76.115.250 – 10.76.115.250	10.76.115.250
252	10.76.115.251/32	10.76.115.251 – 10.76.115.251	10.76.115.251
253	10.76.115.252/32	10.76.115.252 – 10.76.115.252	10.76.115.252
254	10.76.115.253/32	10.76.115.253 – 10.76.115.253	10.76.115.253
255	10.76.115.254/32	10.76.115.254 – 10.76.115.254	10.76.115.254
256	10.76.115.255/32	10.76.115.255 – 10.76.115.255	10.76.115.255

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 →