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)10.3.50.0/23

network10.3.50.0/23

broadcast10.3.51.255

first host10.3.50.1

last host10.3.51.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.3.50.0/23

address00001010.00000011.00110010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000011.00110010.00000000

broadcast00001010.00000011.00110011.11111111

green = network part, grey = host part

hex0x0a033200

decimal167981568

reverse dns0.50.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:3200

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.3.50.0/32	10.3.50.0 – 10.3.50.0	10.3.50.0
2	10.3.50.1/32	10.3.50.1 – 10.3.50.1	10.3.50.1
3	10.3.50.2/32	10.3.50.2 – 10.3.50.2	10.3.50.2
4	10.3.50.3/32	10.3.50.3 – 10.3.50.3	10.3.50.3
5	10.3.50.4/32	10.3.50.4 – 10.3.50.4	10.3.50.4
6	10.3.50.5/32	10.3.50.5 – 10.3.50.5	10.3.50.5
7	10.3.50.6/32	10.3.50.6 – 10.3.50.6	10.3.50.6
8	10.3.50.7/32	10.3.50.7 – 10.3.50.7	10.3.50.7
9	10.3.50.8/32	10.3.50.8 – 10.3.50.8	10.3.50.8
10	10.3.50.9/32	10.3.50.9 – 10.3.50.9	10.3.50.9
11	10.3.50.10/32	10.3.50.10 – 10.3.50.10	10.3.50.10
12	10.3.50.11/32	10.3.50.11 – 10.3.50.11	10.3.50.11
13	10.3.50.12/32	10.3.50.12 – 10.3.50.12	10.3.50.12
14	10.3.50.13/32	10.3.50.13 – 10.3.50.13	10.3.50.13
15	10.3.50.14/32	10.3.50.14 – 10.3.50.14	10.3.50.14
16	10.3.50.15/32	10.3.50.15 – 10.3.50.15	10.3.50.15
17	10.3.50.16/32	10.3.50.16 – 10.3.50.16	10.3.50.16
18	10.3.50.17/32	10.3.50.17 – 10.3.50.17	10.3.50.17
19	10.3.50.18/32	10.3.50.18 – 10.3.50.18	10.3.50.18
20	10.3.50.19/32	10.3.50.19 – 10.3.50.19	10.3.50.19
21	10.3.50.20/32	10.3.50.20 – 10.3.50.20	10.3.50.20
22	10.3.50.21/32	10.3.50.21 – 10.3.50.21	10.3.50.21
23	10.3.50.22/32	10.3.50.22 – 10.3.50.22	10.3.50.22
24	10.3.50.23/32	10.3.50.23 – 10.3.50.23	10.3.50.23
25	10.3.50.24/32	10.3.50.24 – 10.3.50.24	10.3.50.24
26	10.3.50.25/32	10.3.50.25 – 10.3.50.25	10.3.50.25
27	10.3.50.26/32	10.3.50.26 – 10.3.50.26	10.3.50.26
28	10.3.50.27/32	10.3.50.27 – 10.3.50.27	10.3.50.27
29	10.3.50.28/32	10.3.50.28 – 10.3.50.28	10.3.50.28
30	10.3.50.29/32	10.3.50.29 – 10.3.50.29	10.3.50.29
31	10.3.50.30/32	10.3.50.30 – 10.3.50.30	10.3.50.30
32	10.3.50.31/32	10.3.50.31 – 10.3.50.31	10.3.50.31
33	10.3.50.32/32	10.3.50.32 – 10.3.50.32	10.3.50.32
34	10.3.50.33/32	10.3.50.33 – 10.3.50.33	10.3.50.33
35	10.3.50.34/32	10.3.50.34 – 10.3.50.34	10.3.50.34
36	10.3.50.35/32	10.3.50.35 – 10.3.50.35	10.3.50.35
37	10.3.50.36/32	10.3.50.36 – 10.3.50.36	10.3.50.36
38	10.3.50.37/32	10.3.50.37 – 10.3.50.37	10.3.50.37
39	10.3.50.38/32	10.3.50.38 – 10.3.50.38	10.3.50.38
40	10.3.50.39/32	10.3.50.39 – 10.3.50.39	10.3.50.39
41	10.3.50.40/32	10.3.50.40 – 10.3.50.40	10.3.50.40
42	10.3.50.41/32	10.3.50.41 – 10.3.50.41	10.3.50.41
43	10.3.50.42/32	10.3.50.42 – 10.3.50.42	10.3.50.42
44	10.3.50.43/32	10.3.50.43 – 10.3.50.43	10.3.50.43
45	10.3.50.44/32	10.3.50.44 – 10.3.50.44	10.3.50.44
46	10.3.50.45/32	10.3.50.45 – 10.3.50.45	10.3.50.45
47	10.3.50.46/32	10.3.50.46 – 10.3.50.46	10.3.50.46
48	10.3.50.47/32	10.3.50.47 – 10.3.50.47	10.3.50.47
49	10.3.50.48/32	10.3.50.48 – 10.3.50.48	10.3.50.48
50	10.3.50.49/32	10.3.50.49 – 10.3.50.49	10.3.50.49
51	10.3.50.50/32	10.3.50.50 – 10.3.50.50	10.3.50.50
52	10.3.50.51/32	10.3.50.51 – 10.3.50.51	10.3.50.51
53	10.3.50.52/32	10.3.50.52 – 10.3.50.52	10.3.50.52
54	10.3.50.53/32	10.3.50.53 – 10.3.50.53	10.3.50.53
55	10.3.50.54/32	10.3.50.54 – 10.3.50.54	10.3.50.54
56	10.3.50.55/32	10.3.50.55 – 10.3.50.55	10.3.50.55
57	10.3.50.56/32	10.3.50.56 – 10.3.50.56	10.3.50.56
58	10.3.50.57/32	10.3.50.57 – 10.3.50.57	10.3.50.57
59	10.3.50.58/32	10.3.50.58 – 10.3.50.58	10.3.50.58
60	10.3.50.59/32	10.3.50.59 – 10.3.50.59	10.3.50.59
61	10.3.50.60/32	10.3.50.60 – 10.3.50.60	10.3.50.60
62	10.3.50.61/32	10.3.50.61 – 10.3.50.61	10.3.50.61
63	10.3.50.62/32	10.3.50.62 – 10.3.50.62	10.3.50.62
64	10.3.50.63/32	10.3.50.63 – 10.3.50.63	10.3.50.63
65	10.3.50.64/32	10.3.50.64 – 10.3.50.64	10.3.50.64
66	10.3.50.65/32	10.3.50.65 – 10.3.50.65	10.3.50.65
67	10.3.50.66/32	10.3.50.66 – 10.3.50.66	10.3.50.66
68	10.3.50.67/32	10.3.50.67 – 10.3.50.67	10.3.50.67
69	10.3.50.68/32	10.3.50.68 – 10.3.50.68	10.3.50.68
70	10.3.50.69/32	10.3.50.69 – 10.3.50.69	10.3.50.69
71	10.3.50.70/32	10.3.50.70 – 10.3.50.70	10.3.50.70
72	10.3.50.71/32	10.3.50.71 – 10.3.50.71	10.3.50.71
73	10.3.50.72/32	10.3.50.72 – 10.3.50.72	10.3.50.72
74	10.3.50.73/32	10.3.50.73 – 10.3.50.73	10.3.50.73
75	10.3.50.74/32	10.3.50.74 – 10.3.50.74	10.3.50.74
76	10.3.50.75/32	10.3.50.75 – 10.3.50.75	10.3.50.75
77	10.3.50.76/32	10.3.50.76 – 10.3.50.76	10.3.50.76
78	10.3.50.77/32	10.3.50.77 – 10.3.50.77	10.3.50.77
79	10.3.50.78/32	10.3.50.78 – 10.3.50.78	10.3.50.78
80	10.3.50.79/32	10.3.50.79 – 10.3.50.79	10.3.50.79
81	10.3.50.80/32	10.3.50.80 – 10.3.50.80	10.3.50.80
82	10.3.50.81/32	10.3.50.81 – 10.3.50.81	10.3.50.81
83	10.3.50.82/32	10.3.50.82 – 10.3.50.82	10.3.50.82
84	10.3.50.83/32	10.3.50.83 – 10.3.50.83	10.3.50.83
85	10.3.50.84/32	10.3.50.84 – 10.3.50.84	10.3.50.84
86	10.3.50.85/32	10.3.50.85 – 10.3.50.85	10.3.50.85
87	10.3.50.86/32	10.3.50.86 – 10.3.50.86	10.3.50.86
88	10.3.50.87/32	10.3.50.87 – 10.3.50.87	10.3.50.87
89	10.3.50.88/32	10.3.50.88 – 10.3.50.88	10.3.50.88
90	10.3.50.89/32	10.3.50.89 – 10.3.50.89	10.3.50.89
91	10.3.50.90/32	10.3.50.90 – 10.3.50.90	10.3.50.90
92	10.3.50.91/32	10.3.50.91 – 10.3.50.91	10.3.50.91
93	10.3.50.92/32	10.3.50.92 – 10.3.50.92	10.3.50.92
94	10.3.50.93/32	10.3.50.93 – 10.3.50.93	10.3.50.93
95	10.3.50.94/32	10.3.50.94 – 10.3.50.94	10.3.50.94
96	10.3.50.95/32	10.3.50.95 – 10.3.50.95	10.3.50.95
97	10.3.50.96/32	10.3.50.96 – 10.3.50.96	10.3.50.96
98	10.3.50.97/32	10.3.50.97 – 10.3.50.97	10.3.50.97
99	10.3.50.98/32	10.3.50.98 – 10.3.50.98	10.3.50.98
100	10.3.50.99/32	10.3.50.99 – 10.3.50.99	10.3.50.99
101	10.3.50.100/32	10.3.50.100 – 10.3.50.100	10.3.50.100
102	10.3.50.101/32	10.3.50.101 – 10.3.50.101	10.3.50.101
103	10.3.50.102/32	10.3.50.102 – 10.3.50.102	10.3.50.102
104	10.3.50.103/32	10.3.50.103 – 10.3.50.103	10.3.50.103
105	10.3.50.104/32	10.3.50.104 – 10.3.50.104	10.3.50.104
106	10.3.50.105/32	10.3.50.105 – 10.3.50.105	10.3.50.105
107	10.3.50.106/32	10.3.50.106 – 10.3.50.106	10.3.50.106
108	10.3.50.107/32	10.3.50.107 – 10.3.50.107	10.3.50.107
109	10.3.50.108/32	10.3.50.108 – 10.3.50.108	10.3.50.108
110	10.3.50.109/32	10.3.50.109 – 10.3.50.109	10.3.50.109
111	10.3.50.110/32	10.3.50.110 – 10.3.50.110	10.3.50.110
112	10.3.50.111/32	10.3.50.111 – 10.3.50.111	10.3.50.111
113	10.3.50.112/32	10.3.50.112 – 10.3.50.112	10.3.50.112
114	10.3.50.113/32	10.3.50.113 – 10.3.50.113	10.3.50.113
115	10.3.50.114/32	10.3.50.114 – 10.3.50.114	10.3.50.114
116	10.3.50.115/32	10.3.50.115 – 10.3.50.115	10.3.50.115
117	10.3.50.116/32	10.3.50.116 – 10.3.50.116	10.3.50.116
118	10.3.50.117/32	10.3.50.117 – 10.3.50.117	10.3.50.117
119	10.3.50.118/32	10.3.50.118 – 10.3.50.118	10.3.50.118
120	10.3.50.119/32	10.3.50.119 – 10.3.50.119	10.3.50.119
121	10.3.50.120/32	10.3.50.120 – 10.3.50.120	10.3.50.120
122	10.3.50.121/32	10.3.50.121 – 10.3.50.121	10.3.50.121
123	10.3.50.122/32	10.3.50.122 – 10.3.50.122	10.3.50.122
124	10.3.50.123/32	10.3.50.123 – 10.3.50.123	10.3.50.123
125	10.3.50.124/32	10.3.50.124 – 10.3.50.124	10.3.50.124
126	10.3.50.125/32	10.3.50.125 – 10.3.50.125	10.3.50.125
127	10.3.50.126/32	10.3.50.126 – 10.3.50.126	10.3.50.126
128	10.3.50.127/32	10.3.50.127 – 10.3.50.127	10.3.50.127
129	10.3.50.128/32	10.3.50.128 – 10.3.50.128	10.3.50.128
130	10.3.50.129/32	10.3.50.129 – 10.3.50.129	10.3.50.129
131	10.3.50.130/32	10.3.50.130 – 10.3.50.130	10.3.50.130
132	10.3.50.131/32	10.3.50.131 – 10.3.50.131	10.3.50.131
133	10.3.50.132/32	10.3.50.132 – 10.3.50.132	10.3.50.132
134	10.3.50.133/32	10.3.50.133 – 10.3.50.133	10.3.50.133
135	10.3.50.134/32	10.3.50.134 – 10.3.50.134	10.3.50.134
136	10.3.50.135/32	10.3.50.135 – 10.3.50.135	10.3.50.135
137	10.3.50.136/32	10.3.50.136 – 10.3.50.136	10.3.50.136
138	10.3.50.137/32	10.3.50.137 – 10.3.50.137	10.3.50.137
139	10.3.50.138/32	10.3.50.138 – 10.3.50.138	10.3.50.138
140	10.3.50.139/32	10.3.50.139 – 10.3.50.139	10.3.50.139
141	10.3.50.140/32	10.3.50.140 – 10.3.50.140	10.3.50.140
142	10.3.50.141/32	10.3.50.141 – 10.3.50.141	10.3.50.141
143	10.3.50.142/32	10.3.50.142 – 10.3.50.142	10.3.50.142
144	10.3.50.143/32	10.3.50.143 – 10.3.50.143	10.3.50.143
145	10.3.50.144/32	10.3.50.144 – 10.3.50.144	10.3.50.144
146	10.3.50.145/32	10.3.50.145 – 10.3.50.145	10.3.50.145
147	10.3.50.146/32	10.3.50.146 – 10.3.50.146	10.3.50.146
148	10.3.50.147/32	10.3.50.147 – 10.3.50.147	10.3.50.147
149	10.3.50.148/32	10.3.50.148 – 10.3.50.148	10.3.50.148
150	10.3.50.149/32	10.3.50.149 – 10.3.50.149	10.3.50.149
151	10.3.50.150/32	10.3.50.150 – 10.3.50.150	10.3.50.150
152	10.3.50.151/32	10.3.50.151 – 10.3.50.151	10.3.50.151
153	10.3.50.152/32	10.3.50.152 – 10.3.50.152	10.3.50.152
154	10.3.50.153/32	10.3.50.153 – 10.3.50.153	10.3.50.153
155	10.3.50.154/32	10.3.50.154 – 10.3.50.154	10.3.50.154
156	10.3.50.155/32	10.3.50.155 – 10.3.50.155	10.3.50.155
157	10.3.50.156/32	10.3.50.156 – 10.3.50.156	10.3.50.156
158	10.3.50.157/32	10.3.50.157 – 10.3.50.157	10.3.50.157
159	10.3.50.158/32	10.3.50.158 – 10.3.50.158	10.3.50.158
160	10.3.50.159/32	10.3.50.159 – 10.3.50.159	10.3.50.159
161	10.3.50.160/32	10.3.50.160 – 10.3.50.160	10.3.50.160
162	10.3.50.161/32	10.3.50.161 – 10.3.50.161	10.3.50.161
163	10.3.50.162/32	10.3.50.162 – 10.3.50.162	10.3.50.162
164	10.3.50.163/32	10.3.50.163 – 10.3.50.163	10.3.50.163
165	10.3.50.164/32	10.3.50.164 – 10.3.50.164	10.3.50.164
166	10.3.50.165/32	10.3.50.165 – 10.3.50.165	10.3.50.165
167	10.3.50.166/32	10.3.50.166 – 10.3.50.166	10.3.50.166
168	10.3.50.167/32	10.3.50.167 – 10.3.50.167	10.3.50.167
169	10.3.50.168/32	10.3.50.168 – 10.3.50.168	10.3.50.168
170	10.3.50.169/32	10.3.50.169 – 10.3.50.169	10.3.50.169
171	10.3.50.170/32	10.3.50.170 – 10.3.50.170	10.3.50.170
172	10.3.50.171/32	10.3.50.171 – 10.3.50.171	10.3.50.171
173	10.3.50.172/32	10.3.50.172 – 10.3.50.172	10.3.50.172
174	10.3.50.173/32	10.3.50.173 – 10.3.50.173	10.3.50.173
175	10.3.50.174/32	10.3.50.174 – 10.3.50.174	10.3.50.174
176	10.3.50.175/32	10.3.50.175 – 10.3.50.175	10.3.50.175
177	10.3.50.176/32	10.3.50.176 – 10.3.50.176	10.3.50.176
178	10.3.50.177/32	10.3.50.177 – 10.3.50.177	10.3.50.177
179	10.3.50.178/32	10.3.50.178 – 10.3.50.178	10.3.50.178
180	10.3.50.179/32	10.3.50.179 – 10.3.50.179	10.3.50.179
181	10.3.50.180/32	10.3.50.180 – 10.3.50.180	10.3.50.180
182	10.3.50.181/32	10.3.50.181 – 10.3.50.181	10.3.50.181
183	10.3.50.182/32	10.3.50.182 – 10.3.50.182	10.3.50.182
184	10.3.50.183/32	10.3.50.183 – 10.3.50.183	10.3.50.183
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189	10.3.50.188/32	10.3.50.188 – 10.3.50.188	10.3.50.188
190	10.3.50.189/32	10.3.50.189 – 10.3.50.189	10.3.50.189
191	10.3.50.190/32	10.3.50.190 – 10.3.50.190	10.3.50.190
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198	10.3.50.197/32	10.3.50.197 – 10.3.50.197	10.3.50.197
199	10.3.50.198/32	10.3.50.198 – 10.3.50.198	10.3.50.198
200	10.3.50.199/32	10.3.50.199 – 10.3.50.199	10.3.50.199
201	10.3.50.200/32	10.3.50.200 – 10.3.50.200	10.3.50.200
202	10.3.50.201/32	10.3.50.201 – 10.3.50.201	10.3.50.201
203	10.3.50.202/32	10.3.50.202 – 10.3.50.202	10.3.50.202
204	10.3.50.203/32	10.3.50.203 – 10.3.50.203	10.3.50.203
205	10.3.50.204/32	10.3.50.204 – 10.3.50.204	10.3.50.204
206	10.3.50.205/32	10.3.50.205 – 10.3.50.205	10.3.50.205
207	10.3.50.206/32	10.3.50.206 – 10.3.50.206	10.3.50.206
208	10.3.50.207/32	10.3.50.207 – 10.3.50.207	10.3.50.207
209	10.3.50.208/32	10.3.50.208 – 10.3.50.208	10.3.50.208
210	10.3.50.209/32	10.3.50.209 – 10.3.50.209	10.3.50.209
211	10.3.50.210/32	10.3.50.210 – 10.3.50.210	10.3.50.210
212	10.3.50.211/32	10.3.50.211 – 10.3.50.211	10.3.50.211
213	10.3.50.212/32	10.3.50.212 – 10.3.50.212	10.3.50.212
214	10.3.50.213/32	10.3.50.213 – 10.3.50.213	10.3.50.213
215	10.3.50.214/32	10.3.50.214 – 10.3.50.214	10.3.50.214
216	10.3.50.215/32	10.3.50.215 – 10.3.50.215	10.3.50.215
217	10.3.50.216/32	10.3.50.216 – 10.3.50.216	10.3.50.216
218	10.3.50.217/32	10.3.50.217 – 10.3.50.217	10.3.50.217
219	10.3.50.218/32	10.3.50.218 – 10.3.50.218	10.3.50.218
220	10.3.50.219/32	10.3.50.219 – 10.3.50.219	10.3.50.219
221	10.3.50.220/32	10.3.50.220 – 10.3.50.220	10.3.50.220
222	10.3.50.221/32	10.3.50.221 – 10.3.50.221	10.3.50.221
223	10.3.50.222/32	10.3.50.222 – 10.3.50.222	10.3.50.222
224	10.3.50.223/32	10.3.50.223 – 10.3.50.223	10.3.50.223
225	10.3.50.224/32	10.3.50.224 – 10.3.50.224	10.3.50.224
226	10.3.50.225/32	10.3.50.225 – 10.3.50.225	10.3.50.225
227	10.3.50.226/32	10.3.50.226 – 10.3.50.226	10.3.50.226
228	10.3.50.227/32	10.3.50.227 – 10.3.50.227	10.3.50.227
229	10.3.50.228/32	10.3.50.228 – 10.3.50.228	10.3.50.228
230	10.3.50.229/32	10.3.50.229 – 10.3.50.229	10.3.50.229
231	10.3.50.230/32	10.3.50.230 – 10.3.50.230	10.3.50.230
232	10.3.50.231/32	10.3.50.231 – 10.3.50.231	10.3.50.231
233	10.3.50.232/32	10.3.50.232 – 10.3.50.232	10.3.50.232
234	10.3.50.233/32	10.3.50.233 – 10.3.50.233	10.3.50.233
235	10.3.50.234/32	10.3.50.234 – 10.3.50.234	10.3.50.234
236	10.3.50.235/32	10.3.50.235 – 10.3.50.235	10.3.50.235
237	10.3.50.236/32	10.3.50.236 – 10.3.50.236	10.3.50.236
238	10.3.50.237/32	10.3.50.237 – 10.3.50.237	10.3.50.237
239	10.3.50.238/32	10.3.50.238 – 10.3.50.238	10.3.50.238
240	10.3.50.239/32	10.3.50.239 – 10.3.50.239	10.3.50.239
241	10.3.50.240/32	10.3.50.240 – 10.3.50.240	10.3.50.240
242	10.3.50.241/32	10.3.50.241 – 10.3.50.241	10.3.50.241
243	10.3.50.242/32	10.3.50.242 – 10.3.50.242	10.3.50.242
244	10.3.50.243/32	10.3.50.243 – 10.3.50.243	10.3.50.243
245	10.3.50.244/32	10.3.50.244 – 10.3.50.244	10.3.50.244
246	10.3.50.245/32	10.3.50.245 – 10.3.50.245	10.3.50.245
247	10.3.50.246/32	10.3.50.246 – 10.3.50.246	10.3.50.246
248	10.3.50.247/32	10.3.50.247 – 10.3.50.247	10.3.50.247
249	10.3.50.248/32	10.3.50.248 – 10.3.50.248	10.3.50.248
250	10.3.50.249/32	10.3.50.249 – 10.3.50.249	10.3.50.249
251	10.3.50.250/32	10.3.50.250 – 10.3.50.250	10.3.50.250
252	10.3.50.251/32	10.3.50.251 – 10.3.50.251	10.3.50.251
253	10.3.50.252/32	10.3.50.252 – 10.3.50.252	10.3.50.252
254	10.3.50.253/32	10.3.50.253 – 10.3.50.253	10.3.50.253
255	10.3.50.254/32	10.3.50.254 – 10.3.50.254	10.3.50.254
256	10.3.50.255/32	10.3.50.255 – 10.3.50.255	10.3.50.255

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 →