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)10.72.74.0/24

network10.72.74.0/24

broadcast10.72.74.255

first host10.72.74.1

last host10.72.74.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.72.74.0/24

address00001010.01001000.01001010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01001000.01001010.00000000

broadcast00001010.01001000.01001010.11111111

green = network part, grey = host part

hex0x0a484a00

decimal172509696

reverse dns0.74.72.10.in-addr.arpa

ipv4-mapped::ffff:a48:4a00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.72.74.0/32	10.72.74.0 – 10.72.74.0	10.72.74.0
2	10.72.74.1/32	10.72.74.1 – 10.72.74.1	10.72.74.1
3	10.72.74.2/32	10.72.74.2 – 10.72.74.2	10.72.74.2
4	10.72.74.3/32	10.72.74.3 – 10.72.74.3	10.72.74.3
5	10.72.74.4/32	10.72.74.4 – 10.72.74.4	10.72.74.4
6	10.72.74.5/32	10.72.74.5 – 10.72.74.5	10.72.74.5
7	10.72.74.6/32	10.72.74.6 – 10.72.74.6	10.72.74.6
8	10.72.74.7/32	10.72.74.7 – 10.72.74.7	10.72.74.7
9	10.72.74.8/32	10.72.74.8 – 10.72.74.8	10.72.74.8
10	10.72.74.9/32	10.72.74.9 – 10.72.74.9	10.72.74.9
11	10.72.74.10/32	10.72.74.10 – 10.72.74.10	10.72.74.10
12	10.72.74.11/32	10.72.74.11 – 10.72.74.11	10.72.74.11
13	10.72.74.12/32	10.72.74.12 – 10.72.74.12	10.72.74.12
14	10.72.74.13/32	10.72.74.13 – 10.72.74.13	10.72.74.13
15	10.72.74.14/32	10.72.74.14 – 10.72.74.14	10.72.74.14
16	10.72.74.15/32	10.72.74.15 – 10.72.74.15	10.72.74.15
17	10.72.74.16/32	10.72.74.16 – 10.72.74.16	10.72.74.16
18	10.72.74.17/32	10.72.74.17 – 10.72.74.17	10.72.74.17
19	10.72.74.18/32	10.72.74.18 – 10.72.74.18	10.72.74.18
20	10.72.74.19/32	10.72.74.19 – 10.72.74.19	10.72.74.19
21	10.72.74.20/32	10.72.74.20 – 10.72.74.20	10.72.74.20
22	10.72.74.21/32	10.72.74.21 – 10.72.74.21	10.72.74.21
23	10.72.74.22/32	10.72.74.22 – 10.72.74.22	10.72.74.22
24	10.72.74.23/32	10.72.74.23 – 10.72.74.23	10.72.74.23
25	10.72.74.24/32	10.72.74.24 – 10.72.74.24	10.72.74.24
26	10.72.74.25/32	10.72.74.25 – 10.72.74.25	10.72.74.25
27	10.72.74.26/32	10.72.74.26 – 10.72.74.26	10.72.74.26
28	10.72.74.27/32	10.72.74.27 – 10.72.74.27	10.72.74.27
29	10.72.74.28/32	10.72.74.28 – 10.72.74.28	10.72.74.28
30	10.72.74.29/32	10.72.74.29 – 10.72.74.29	10.72.74.29
31	10.72.74.30/32	10.72.74.30 – 10.72.74.30	10.72.74.30
32	10.72.74.31/32	10.72.74.31 – 10.72.74.31	10.72.74.31
33	10.72.74.32/32	10.72.74.32 – 10.72.74.32	10.72.74.32
34	10.72.74.33/32	10.72.74.33 – 10.72.74.33	10.72.74.33
35	10.72.74.34/32	10.72.74.34 – 10.72.74.34	10.72.74.34
36	10.72.74.35/32	10.72.74.35 – 10.72.74.35	10.72.74.35
37	10.72.74.36/32	10.72.74.36 – 10.72.74.36	10.72.74.36
38	10.72.74.37/32	10.72.74.37 – 10.72.74.37	10.72.74.37
39	10.72.74.38/32	10.72.74.38 – 10.72.74.38	10.72.74.38
40	10.72.74.39/32	10.72.74.39 – 10.72.74.39	10.72.74.39
41	10.72.74.40/32	10.72.74.40 – 10.72.74.40	10.72.74.40
42	10.72.74.41/32	10.72.74.41 – 10.72.74.41	10.72.74.41
43	10.72.74.42/32	10.72.74.42 – 10.72.74.42	10.72.74.42
44	10.72.74.43/32	10.72.74.43 – 10.72.74.43	10.72.74.43
45	10.72.74.44/32	10.72.74.44 – 10.72.74.44	10.72.74.44
46	10.72.74.45/32	10.72.74.45 – 10.72.74.45	10.72.74.45
47	10.72.74.46/32	10.72.74.46 – 10.72.74.46	10.72.74.46
48	10.72.74.47/32	10.72.74.47 – 10.72.74.47	10.72.74.47
49	10.72.74.48/32	10.72.74.48 – 10.72.74.48	10.72.74.48
50	10.72.74.49/32	10.72.74.49 – 10.72.74.49	10.72.74.49
51	10.72.74.50/32	10.72.74.50 – 10.72.74.50	10.72.74.50
52	10.72.74.51/32	10.72.74.51 – 10.72.74.51	10.72.74.51
53	10.72.74.52/32	10.72.74.52 – 10.72.74.52	10.72.74.52
54	10.72.74.53/32	10.72.74.53 – 10.72.74.53	10.72.74.53
55	10.72.74.54/32	10.72.74.54 – 10.72.74.54	10.72.74.54
56	10.72.74.55/32	10.72.74.55 – 10.72.74.55	10.72.74.55
57	10.72.74.56/32	10.72.74.56 – 10.72.74.56	10.72.74.56
58	10.72.74.57/32	10.72.74.57 – 10.72.74.57	10.72.74.57
59	10.72.74.58/32	10.72.74.58 – 10.72.74.58	10.72.74.58
60	10.72.74.59/32	10.72.74.59 – 10.72.74.59	10.72.74.59
61	10.72.74.60/32	10.72.74.60 – 10.72.74.60	10.72.74.60
62	10.72.74.61/32	10.72.74.61 – 10.72.74.61	10.72.74.61
63	10.72.74.62/32	10.72.74.62 – 10.72.74.62	10.72.74.62
64	10.72.74.63/32	10.72.74.63 – 10.72.74.63	10.72.74.63
65	10.72.74.64/32	10.72.74.64 – 10.72.74.64	10.72.74.64
66	10.72.74.65/32	10.72.74.65 – 10.72.74.65	10.72.74.65
67	10.72.74.66/32	10.72.74.66 – 10.72.74.66	10.72.74.66
68	10.72.74.67/32	10.72.74.67 – 10.72.74.67	10.72.74.67
69	10.72.74.68/32	10.72.74.68 – 10.72.74.68	10.72.74.68
70	10.72.74.69/32	10.72.74.69 – 10.72.74.69	10.72.74.69
71	10.72.74.70/32	10.72.74.70 – 10.72.74.70	10.72.74.70
72	10.72.74.71/32	10.72.74.71 – 10.72.74.71	10.72.74.71
73	10.72.74.72/32	10.72.74.72 – 10.72.74.72	10.72.74.72
74	10.72.74.73/32	10.72.74.73 – 10.72.74.73	10.72.74.73
75	10.72.74.74/32	10.72.74.74 – 10.72.74.74	10.72.74.74
76	10.72.74.75/32	10.72.74.75 – 10.72.74.75	10.72.74.75
77	10.72.74.76/32	10.72.74.76 – 10.72.74.76	10.72.74.76
78	10.72.74.77/32	10.72.74.77 – 10.72.74.77	10.72.74.77
79	10.72.74.78/32	10.72.74.78 – 10.72.74.78	10.72.74.78
80	10.72.74.79/32	10.72.74.79 – 10.72.74.79	10.72.74.79
81	10.72.74.80/32	10.72.74.80 – 10.72.74.80	10.72.74.80
82	10.72.74.81/32	10.72.74.81 – 10.72.74.81	10.72.74.81
83	10.72.74.82/32	10.72.74.82 – 10.72.74.82	10.72.74.82
84	10.72.74.83/32	10.72.74.83 – 10.72.74.83	10.72.74.83
85	10.72.74.84/32	10.72.74.84 – 10.72.74.84	10.72.74.84
86	10.72.74.85/32	10.72.74.85 – 10.72.74.85	10.72.74.85
87	10.72.74.86/32	10.72.74.86 – 10.72.74.86	10.72.74.86
88	10.72.74.87/32	10.72.74.87 – 10.72.74.87	10.72.74.87
89	10.72.74.88/32	10.72.74.88 – 10.72.74.88	10.72.74.88
90	10.72.74.89/32	10.72.74.89 – 10.72.74.89	10.72.74.89
91	10.72.74.90/32	10.72.74.90 – 10.72.74.90	10.72.74.90
92	10.72.74.91/32	10.72.74.91 – 10.72.74.91	10.72.74.91
93	10.72.74.92/32	10.72.74.92 – 10.72.74.92	10.72.74.92
94	10.72.74.93/32	10.72.74.93 – 10.72.74.93	10.72.74.93
95	10.72.74.94/32	10.72.74.94 – 10.72.74.94	10.72.74.94
96	10.72.74.95/32	10.72.74.95 – 10.72.74.95	10.72.74.95
97	10.72.74.96/32	10.72.74.96 – 10.72.74.96	10.72.74.96
98	10.72.74.97/32	10.72.74.97 – 10.72.74.97	10.72.74.97
99	10.72.74.98/32	10.72.74.98 – 10.72.74.98	10.72.74.98
100	10.72.74.99/32	10.72.74.99 – 10.72.74.99	10.72.74.99
101	10.72.74.100/32	10.72.74.100 – 10.72.74.100	10.72.74.100
102	10.72.74.101/32	10.72.74.101 – 10.72.74.101	10.72.74.101
103	10.72.74.102/32	10.72.74.102 – 10.72.74.102	10.72.74.102
104	10.72.74.103/32	10.72.74.103 – 10.72.74.103	10.72.74.103
105	10.72.74.104/32	10.72.74.104 – 10.72.74.104	10.72.74.104
106	10.72.74.105/32	10.72.74.105 – 10.72.74.105	10.72.74.105
107	10.72.74.106/32	10.72.74.106 – 10.72.74.106	10.72.74.106
108	10.72.74.107/32	10.72.74.107 – 10.72.74.107	10.72.74.107
109	10.72.74.108/32	10.72.74.108 – 10.72.74.108	10.72.74.108
110	10.72.74.109/32	10.72.74.109 – 10.72.74.109	10.72.74.109
111	10.72.74.110/32	10.72.74.110 – 10.72.74.110	10.72.74.110
112	10.72.74.111/32	10.72.74.111 – 10.72.74.111	10.72.74.111
113	10.72.74.112/32	10.72.74.112 – 10.72.74.112	10.72.74.112
114	10.72.74.113/32	10.72.74.113 – 10.72.74.113	10.72.74.113
115	10.72.74.114/32	10.72.74.114 – 10.72.74.114	10.72.74.114
116	10.72.74.115/32	10.72.74.115 – 10.72.74.115	10.72.74.115
117	10.72.74.116/32	10.72.74.116 – 10.72.74.116	10.72.74.116
118	10.72.74.117/32	10.72.74.117 – 10.72.74.117	10.72.74.117
119	10.72.74.118/32	10.72.74.118 – 10.72.74.118	10.72.74.118
120	10.72.74.119/32	10.72.74.119 – 10.72.74.119	10.72.74.119
121	10.72.74.120/32	10.72.74.120 – 10.72.74.120	10.72.74.120
122	10.72.74.121/32	10.72.74.121 – 10.72.74.121	10.72.74.121
123	10.72.74.122/32	10.72.74.122 – 10.72.74.122	10.72.74.122
124	10.72.74.123/32	10.72.74.123 – 10.72.74.123	10.72.74.123
125	10.72.74.124/32	10.72.74.124 – 10.72.74.124	10.72.74.124
126	10.72.74.125/32	10.72.74.125 – 10.72.74.125	10.72.74.125
127	10.72.74.126/32	10.72.74.126 – 10.72.74.126	10.72.74.126
128	10.72.74.127/32	10.72.74.127 – 10.72.74.127	10.72.74.127
129	10.72.74.128/32	10.72.74.128 – 10.72.74.128	10.72.74.128
130	10.72.74.129/32	10.72.74.129 – 10.72.74.129	10.72.74.129
131	10.72.74.130/32	10.72.74.130 – 10.72.74.130	10.72.74.130
132	10.72.74.131/32	10.72.74.131 – 10.72.74.131	10.72.74.131
133	10.72.74.132/32	10.72.74.132 – 10.72.74.132	10.72.74.132
134	10.72.74.133/32	10.72.74.133 – 10.72.74.133	10.72.74.133
135	10.72.74.134/32	10.72.74.134 – 10.72.74.134	10.72.74.134
136	10.72.74.135/32	10.72.74.135 – 10.72.74.135	10.72.74.135
137	10.72.74.136/32	10.72.74.136 – 10.72.74.136	10.72.74.136
138	10.72.74.137/32	10.72.74.137 – 10.72.74.137	10.72.74.137
139	10.72.74.138/32	10.72.74.138 – 10.72.74.138	10.72.74.138
140	10.72.74.139/32	10.72.74.139 – 10.72.74.139	10.72.74.139
141	10.72.74.140/32	10.72.74.140 – 10.72.74.140	10.72.74.140
142	10.72.74.141/32	10.72.74.141 – 10.72.74.141	10.72.74.141
143	10.72.74.142/32	10.72.74.142 – 10.72.74.142	10.72.74.142
144	10.72.74.143/32	10.72.74.143 – 10.72.74.143	10.72.74.143
145	10.72.74.144/32	10.72.74.144 – 10.72.74.144	10.72.74.144
146	10.72.74.145/32	10.72.74.145 – 10.72.74.145	10.72.74.145
147	10.72.74.146/32	10.72.74.146 – 10.72.74.146	10.72.74.146
148	10.72.74.147/32	10.72.74.147 – 10.72.74.147	10.72.74.147
149	10.72.74.148/32	10.72.74.148 – 10.72.74.148	10.72.74.148
150	10.72.74.149/32	10.72.74.149 – 10.72.74.149	10.72.74.149
151	10.72.74.150/32	10.72.74.150 – 10.72.74.150	10.72.74.150
152	10.72.74.151/32	10.72.74.151 – 10.72.74.151	10.72.74.151
153	10.72.74.152/32	10.72.74.152 – 10.72.74.152	10.72.74.152
154	10.72.74.153/32	10.72.74.153 – 10.72.74.153	10.72.74.153
155	10.72.74.154/32	10.72.74.154 – 10.72.74.154	10.72.74.154
156	10.72.74.155/32	10.72.74.155 – 10.72.74.155	10.72.74.155
157	10.72.74.156/32	10.72.74.156 – 10.72.74.156	10.72.74.156
158	10.72.74.157/32	10.72.74.157 – 10.72.74.157	10.72.74.157
159	10.72.74.158/32	10.72.74.158 – 10.72.74.158	10.72.74.158
160	10.72.74.159/32	10.72.74.159 – 10.72.74.159	10.72.74.159
161	10.72.74.160/32	10.72.74.160 – 10.72.74.160	10.72.74.160
162	10.72.74.161/32	10.72.74.161 – 10.72.74.161	10.72.74.161
163	10.72.74.162/32	10.72.74.162 – 10.72.74.162	10.72.74.162
164	10.72.74.163/32	10.72.74.163 – 10.72.74.163	10.72.74.163
165	10.72.74.164/32	10.72.74.164 – 10.72.74.164	10.72.74.164
166	10.72.74.165/32	10.72.74.165 – 10.72.74.165	10.72.74.165
167	10.72.74.166/32	10.72.74.166 – 10.72.74.166	10.72.74.166
168	10.72.74.167/32	10.72.74.167 – 10.72.74.167	10.72.74.167
169	10.72.74.168/32	10.72.74.168 – 10.72.74.168	10.72.74.168
170	10.72.74.169/32	10.72.74.169 – 10.72.74.169	10.72.74.169
171	10.72.74.170/32	10.72.74.170 – 10.72.74.170	10.72.74.170
172	10.72.74.171/32	10.72.74.171 – 10.72.74.171	10.72.74.171
173	10.72.74.172/32	10.72.74.172 – 10.72.74.172	10.72.74.172
174	10.72.74.173/32	10.72.74.173 – 10.72.74.173	10.72.74.173
175	10.72.74.174/32	10.72.74.174 – 10.72.74.174	10.72.74.174
176	10.72.74.175/32	10.72.74.175 – 10.72.74.175	10.72.74.175
177	10.72.74.176/32	10.72.74.176 – 10.72.74.176	10.72.74.176
178	10.72.74.177/32	10.72.74.177 – 10.72.74.177	10.72.74.177
179	10.72.74.178/32	10.72.74.178 – 10.72.74.178	10.72.74.178
180	10.72.74.179/32	10.72.74.179 – 10.72.74.179	10.72.74.179
181	10.72.74.180/32	10.72.74.180 – 10.72.74.180	10.72.74.180
182	10.72.74.181/32	10.72.74.181 – 10.72.74.181	10.72.74.181
183	10.72.74.182/32	10.72.74.182 – 10.72.74.182	10.72.74.182
184	10.72.74.183/32	10.72.74.183 – 10.72.74.183	10.72.74.183
185	10.72.74.184/32	10.72.74.184 – 10.72.74.184	10.72.74.184
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187	10.72.74.186/32	10.72.74.186 – 10.72.74.186	10.72.74.186
188	10.72.74.187/32	10.72.74.187 – 10.72.74.187	10.72.74.187
189	10.72.74.188/32	10.72.74.188 – 10.72.74.188	10.72.74.188
190	10.72.74.189/32	10.72.74.189 – 10.72.74.189	10.72.74.189
191	10.72.74.190/32	10.72.74.190 – 10.72.74.190	10.72.74.190
192	10.72.74.191/32	10.72.74.191 – 10.72.74.191	10.72.74.191
193	10.72.74.192/32	10.72.74.192 – 10.72.74.192	10.72.74.192
194	10.72.74.193/32	10.72.74.193 – 10.72.74.193	10.72.74.193
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196	10.72.74.195/32	10.72.74.195 – 10.72.74.195	10.72.74.195
197	10.72.74.196/32	10.72.74.196 – 10.72.74.196	10.72.74.196
198	10.72.74.197/32	10.72.74.197 – 10.72.74.197	10.72.74.197
199	10.72.74.198/32	10.72.74.198 – 10.72.74.198	10.72.74.198
200	10.72.74.199/32	10.72.74.199 – 10.72.74.199	10.72.74.199
201	10.72.74.200/32	10.72.74.200 – 10.72.74.200	10.72.74.200
202	10.72.74.201/32	10.72.74.201 – 10.72.74.201	10.72.74.201
203	10.72.74.202/32	10.72.74.202 – 10.72.74.202	10.72.74.202
204	10.72.74.203/32	10.72.74.203 – 10.72.74.203	10.72.74.203
205	10.72.74.204/32	10.72.74.204 – 10.72.74.204	10.72.74.204
206	10.72.74.205/32	10.72.74.205 – 10.72.74.205	10.72.74.205
207	10.72.74.206/32	10.72.74.206 – 10.72.74.206	10.72.74.206
208	10.72.74.207/32	10.72.74.207 – 10.72.74.207	10.72.74.207
209	10.72.74.208/32	10.72.74.208 – 10.72.74.208	10.72.74.208
210	10.72.74.209/32	10.72.74.209 – 10.72.74.209	10.72.74.209
211	10.72.74.210/32	10.72.74.210 – 10.72.74.210	10.72.74.210
212	10.72.74.211/32	10.72.74.211 – 10.72.74.211	10.72.74.211
213	10.72.74.212/32	10.72.74.212 – 10.72.74.212	10.72.74.212
214	10.72.74.213/32	10.72.74.213 – 10.72.74.213	10.72.74.213
215	10.72.74.214/32	10.72.74.214 – 10.72.74.214	10.72.74.214
216	10.72.74.215/32	10.72.74.215 – 10.72.74.215	10.72.74.215
217	10.72.74.216/32	10.72.74.216 – 10.72.74.216	10.72.74.216
218	10.72.74.217/32	10.72.74.217 – 10.72.74.217	10.72.74.217
219	10.72.74.218/32	10.72.74.218 – 10.72.74.218	10.72.74.218
220	10.72.74.219/32	10.72.74.219 – 10.72.74.219	10.72.74.219
221	10.72.74.220/32	10.72.74.220 – 10.72.74.220	10.72.74.220
222	10.72.74.221/32	10.72.74.221 – 10.72.74.221	10.72.74.221
223	10.72.74.222/32	10.72.74.222 – 10.72.74.222	10.72.74.222
224	10.72.74.223/32	10.72.74.223 – 10.72.74.223	10.72.74.223
225	10.72.74.224/32	10.72.74.224 – 10.72.74.224	10.72.74.224
226	10.72.74.225/32	10.72.74.225 – 10.72.74.225	10.72.74.225
227	10.72.74.226/32	10.72.74.226 – 10.72.74.226	10.72.74.226
228	10.72.74.227/32	10.72.74.227 – 10.72.74.227	10.72.74.227
229	10.72.74.228/32	10.72.74.228 – 10.72.74.228	10.72.74.228
230	10.72.74.229/32	10.72.74.229 – 10.72.74.229	10.72.74.229
231	10.72.74.230/32	10.72.74.230 – 10.72.74.230	10.72.74.230
232	10.72.74.231/32	10.72.74.231 – 10.72.74.231	10.72.74.231
233	10.72.74.232/32	10.72.74.232 – 10.72.74.232	10.72.74.232
234	10.72.74.233/32	10.72.74.233 – 10.72.74.233	10.72.74.233
235	10.72.74.234/32	10.72.74.234 – 10.72.74.234	10.72.74.234
236	10.72.74.235/32	10.72.74.235 – 10.72.74.235	10.72.74.235
237	10.72.74.236/32	10.72.74.236 – 10.72.74.236	10.72.74.236
238	10.72.74.237/32	10.72.74.237 – 10.72.74.237	10.72.74.237
239	10.72.74.238/32	10.72.74.238 – 10.72.74.238	10.72.74.238
240	10.72.74.239/32	10.72.74.239 – 10.72.74.239	10.72.74.239
241	10.72.74.240/32	10.72.74.240 – 10.72.74.240	10.72.74.240
242	10.72.74.241/32	10.72.74.241 – 10.72.74.241	10.72.74.241
243	10.72.74.242/32	10.72.74.242 – 10.72.74.242	10.72.74.242
244	10.72.74.243/32	10.72.74.243 – 10.72.74.243	10.72.74.243
245	10.72.74.244/32	10.72.74.244 – 10.72.74.244	10.72.74.244
246	10.72.74.245/32	10.72.74.245 – 10.72.74.245	10.72.74.245
247	10.72.74.246/32	10.72.74.246 – 10.72.74.246	10.72.74.246
248	10.72.74.247/32	10.72.74.247 – 10.72.74.247	10.72.74.247
249	10.72.74.248/32	10.72.74.248 – 10.72.74.248	10.72.74.248
250	10.72.74.249/32	10.72.74.249 – 10.72.74.249	10.72.74.249
251	10.72.74.250/32	10.72.74.250 – 10.72.74.250	10.72.74.250
252	10.72.74.251/32	10.72.74.251 – 10.72.74.251	10.72.74.251
253	10.72.74.252/32	10.72.74.252 – 10.72.74.252	10.72.74.252
254	10.72.74.253/32	10.72.74.253 – 10.72.74.253	10.72.74.253
255	10.72.74.254/32	10.72.74.254 – 10.72.74.254	10.72.74.254
256	10.72.74.255/32	10.72.74.255 – 10.72.74.255	10.72.74.255

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 →