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)10.167.123.0/24

network10.167.123.0/24

broadcast10.167.123.255

first host10.167.123.1

last host10.167.123.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.123.0/24

address00001010.10100111.01111011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.01111011.00000000

broadcast00001010.10100111.01111011.11111111

green = network part, grey = host part

hex0x0aa77b00

decimal178748160

reverse dns0.123.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7b00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.123.0/32	10.167.123.0 – 10.167.123.0	10.167.123.0
2	10.167.123.1/32	10.167.123.1 – 10.167.123.1	10.167.123.1
3	10.167.123.2/32	10.167.123.2 – 10.167.123.2	10.167.123.2
4	10.167.123.3/32	10.167.123.3 – 10.167.123.3	10.167.123.3
5	10.167.123.4/32	10.167.123.4 – 10.167.123.4	10.167.123.4
6	10.167.123.5/32	10.167.123.5 – 10.167.123.5	10.167.123.5
7	10.167.123.6/32	10.167.123.6 – 10.167.123.6	10.167.123.6
8	10.167.123.7/32	10.167.123.7 – 10.167.123.7	10.167.123.7
9	10.167.123.8/32	10.167.123.8 – 10.167.123.8	10.167.123.8
10	10.167.123.9/32	10.167.123.9 – 10.167.123.9	10.167.123.9
11	10.167.123.10/32	10.167.123.10 – 10.167.123.10	10.167.123.10
12	10.167.123.11/32	10.167.123.11 – 10.167.123.11	10.167.123.11
13	10.167.123.12/32	10.167.123.12 – 10.167.123.12	10.167.123.12
14	10.167.123.13/32	10.167.123.13 – 10.167.123.13	10.167.123.13
15	10.167.123.14/32	10.167.123.14 – 10.167.123.14	10.167.123.14
16	10.167.123.15/32	10.167.123.15 – 10.167.123.15	10.167.123.15
17	10.167.123.16/32	10.167.123.16 – 10.167.123.16	10.167.123.16
18	10.167.123.17/32	10.167.123.17 – 10.167.123.17	10.167.123.17
19	10.167.123.18/32	10.167.123.18 – 10.167.123.18	10.167.123.18
20	10.167.123.19/32	10.167.123.19 – 10.167.123.19	10.167.123.19
21	10.167.123.20/32	10.167.123.20 – 10.167.123.20	10.167.123.20
22	10.167.123.21/32	10.167.123.21 – 10.167.123.21	10.167.123.21
23	10.167.123.22/32	10.167.123.22 – 10.167.123.22	10.167.123.22
24	10.167.123.23/32	10.167.123.23 – 10.167.123.23	10.167.123.23
25	10.167.123.24/32	10.167.123.24 – 10.167.123.24	10.167.123.24
26	10.167.123.25/32	10.167.123.25 – 10.167.123.25	10.167.123.25
27	10.167.123.26/32	10.167.123.26 – 10.167.123.26	10.167.123.26
28	10.167.123.27/32	10.167.123.27 – 10.167.123.27	10.167.123.27
29	10.167.123.28/32	10.167.123.28 – 10.167.123.28	10.167.123.28
30	10.167.123.29/32	10.167.123.29 – 10.167.123.29	10.167.123.29
31	10.167.123.30/32	10.167.123.30 – 10.167.123.30	10.167.123.30
32	10.167.123.31/32	10.167.123.31 – 10.167.123.31	10.167.123.31
33	10.167.123.32/32	10.167.123.32 – 10.167.123.32	10.167.123.32
34	10.167.123.33/32	10.167.123.33 – 10.167.123.33	10.167.123.33
35	10.167.123.34/32	10.167.123.34 – 10.167.123.34	10.167.123.34
36	10.167.123.35/32	10.167.123.35 – 10.167.123.35	10.167.123.35
37	10.167.123.36/32	10.167.123.36 – 10.167.123.36	10.167.123.36
38	10.167.123.37/32	10.167.123.37 – 10.167.123.37	10.167.123.37
39	10.167.123.38/32	10.167.123.38 – 10.167.123.38	10.167.123.38
40	10.167.123.39/32	10.167.123.39 – 10.167.123.39	10.167.123.39
41	10.167.123.40/32	10.167.123.40 – 10.167.123.40	10.167.123.40
42	10.167.123.41/32	10.167.123.41 – 10.167.123.41	10.167.123.41
43	10.167.123.42/32	10.167.123.42 – 10.167.123.42	10.167.123.42
44	10.167.123.43/32	10.167.123.43 – 10.167.123.43	10.167.123.43
45	10.167.123.44/32	10.167.123.44 – 10.167.123.44	10.167.123.44
46	10.167.123.45/32	10.167.123.45 – 10.167.123.45	10.167.123.45
47	10.167.123.46/32	10.167.123.46 – 10.167.123.46	10.167.123.46
48	10.167.123.47/32	10.167.123.47 – 10.167.123.47	10.167.123.47
49	10.167.123.48/32	10.167.123.48 – 10.167.123.48	10.167.123.48
50	10.167.123.49/32	10.167.123.49 – 10.167.123.49	10.167.123.49
51	10.167.123.50/32	10.167.123.50 – 10.167.123.50	10.167.123.50
52	10.167.123.51/32	10.167.123.51 – 10.167.123.51	10.167.123.51
53	10.167.123.52/32	10.167.123.52 – 10.167.123.52	10.167.123.52
54	10.167.123.53/32	10.167.123.53 – 10.167.123.53	10.167.123.53
55	10.167.123.54/32	10.167.123.54 – 10.167.123.54	10.167.123.54
56	10.167.123.55/32	10.167.123.55 – 10.167.123.55	10.167.123.55
57	10.167.123.56/32	10.167.123.56 – 10.167.123.56	10.167.123.56
58	10.167.123.57/32	10.167.123.57 – 10.167.123.57	10.167.123.57
59	10.167.123.58/32	10.167.123.58 – 10.167.123.58	10.167.123.58
60	10.167.123.59/32	10.167.123.59 – 10.167.123.59	10.167.123.59
61	10.167.123.60/32	10.167.123.60 – 10.167.123.60	10.167.123.60
62	10.167.123.61/32	10.167.123.61 – 10.167.123.61	10.167.123.61
63	10.167.123.62/32	10.167.123.62 – 10.167.123.62	10.167.123.62
64	10.167.123.63/32	10.167.123.63 – 10.167.123.63	10.167.123.63
65	10.167.123.64/32	10.167.123.64 – 10.167.123.64	10.167.123.64
66	10.167.123.65/32	10.167.123.65 – 10.167.123.65	10.167.123.65
67	10.167.123.66/32	10.167.123.66 – 10.167.123.66	10.167.123.66
68	10.167.123.67/32	10.167.123.67 – 10.167.123.67	10.167.123.67
69	10.167.123.68/32	10.167.123.68 – 10.167.123.68	10.167.123.68
70	10.167.123.69/32	10.167.123.69 – 10.167.123.69	10.167.123.69
71	10.167.123.70/32	10.167.123.70 – 10.167.123.70	10.167.123.70
72	10.167.123.71/32	10.167.123.71 – 10.167.123.71	10.167.123.71
73	10.167.123.72/32	10.167.123.72 – 10.167.123.72	10.167.123.72
74	10.167.123.73/32	10.167.123.73 – 10.167.123.73	10.167.123.73
75	10.167.123.74/32	10.167.123.74 – 10.167.123.74	10.167.123.74
76	10.167.123.75/32	10.167.123.75 – 10.167.123.75	10.167.123.75
77	10.167.123.76/32	10.167.123.76 – 10.167.123.76	10.167.123.76
78	10.167.123.77/32	10.167.123.77 – 10.167.123.77	10.167.123.77
79	10.167.123.78/32	10.167.123.78 – 10.167.123.78	10.167.123.78
80	10.167.123.79/32	10.167.123.79 – 10.167.123.79	10.167.123.79
81	10.167.123.80/32	10.167.123.80 – 10.167.123.80	10.167.123.80
82	10.167.123.81/32	10.167.123.81 – 10.167.123.81	10.167.123.81
83	10.167.123.82/32	10.167.123.82 – 10.167.123.82	10.167.123.82
84	10.167.123.83/32	10.167.123.83 – 10.167.123.83	10.167.123.83
85	10.167.123.84/32	10.167.123.84 – 10.167.123.84	10.167.123.84
86	10.167.123.85/32	10.167.123.85 – 10.167.123.85	10.167.123.85
87	10.167.123.86/32	10.167.123.86 – 10.167.123.86	10.167.123.86
88	10.167.123.87/32	10.167.123.87 – 10.167.123.87	10.167.123.87
89	10.167.123.88/32	10.167.123.88 – 10.167.123.88	10.167.123.88
90	10.167.123.89/32	10.167.123.89 – 10.167.123.89	10.167.123.89
91	10.167.123.90/32	10.167.123.90 – 10.167.123.90	10.167.123.90
92	10.167.123.91/32	10.167.123.91 – 10.167.123.91	10.167.123.91
93	10.167.123.92/32	10.167.123.92 – 10.167.123.92	10.167.123.92
94	10.167.123.93/32	10.167.123.93 – 10.167.123.93	10.167.123.93
95	10.167.123.94/32	10.167.123.94 – 10.167.123.94	10.167.123.94
96	10.167.123.95/32	10.167.123.95 – 10.167.123.95	10.167.123.95
97	10.167.123.96/32	10.167.123.96 – 10.167.123.96	10.167.123.96
98	10.167.123.97/32	10.167.123.97 – 10.167.123.97	10.167.123.97
99	10.167.123.98/32	10.167.123.98 – 10.167.123.98	10.167.123.98
100	10.167.123.99/32	10.167.123.99 – 10.167.123.99	10.167.123.99
101	10.167.123.100/32	10.167.123.100 – 10.167.123.100	10.167.123.100
102	10.167.123.101/32	10.167.123.101 – 10.167.123.101	10.167.123.101
103	10.167.123.102/32	10.167.123.102 – 10.167.123.102	10.167.123.102
104	10.167.123.103/32	10.167.123.103 – 10.167.123.103	10.167.123.103
105	10.167.123.104/32	10.167.123.104 – 10.167.123.104	10.167.123.104
106	10.167.123.105/32	10.167.123.105 – 10.167.123.105	10.167.123.105
107	10.167.123.106/32	10.167.123.106 – 10.167.123.106	10.167.123.106
108	10.167.123.107/32	10.167.123.107 – 10.167.123.107	10.167.123.107
109	10.167.123.108/32	10.167.123.108 – 10.167.123.108	10.167.123.108
110	10.167.123.109/32	10.167.123.109 – 10.167.123.109	10.167.123.109
111	10.167.123.110/32	10.167.123.110 – 10.167.123.110	10.167.123.110
112	10.167.123.111/32	10.167.123.111 – 10.167.123.111	10.167.123.111
113	10.167.123.112/32	10.167.123.112 – 10.167.123.112	10.167.123.112
114	10.167.123.113/32	10.167.123.113 – 10.167.123.113	10.167.123.113
115	10.167.123.114/32	10.167.123.114 – 10.167.123.114	10.167.123.114
116	10.167.123.115/32	10.167.123.115 – 10.167.123.115	10.167.123.115
117	10.167.123.116/32	10.167.123.116 – 10.167.123.116	10.167.123.116
118	10.167.123.117/32	10.167.123.117 – 10.167.123.117	10.167.123.117
119	10.167.123.118/32	10.167.123.118 – 10.167.123.118	10.167.123.118
120	10.167.123.119/32	10.167.123.119 – 10.167.123.119	10.167.123.119
121	10.167.123.120/32	10.167.123.120 – 10.167.123.120	10.167.123.120
122	10.167.123.121/32	10.167.123.121 – 10.167.123.121	10.167.123.121
123	10.167.123.122/32	10.167.123.122 – 10.167.123.122	10.167.123.122
124	10.167.123.123/32	10.167.123.123 – 10.167.123.123	10.167.123.123
125	10.167.123.124/32	10.167.123.124 – 10.167.123.124	10.167.123.124
126	10.167.123.125/32	10.167.123.125 – 10.167.123.125	10.167.123.125
127	10.167.123.126/32	10.167.123.126 – 10.167.123.126	10.167.123.126
128	10.167.123.127/32	10.167.123.127 – 10.167.123.127	10.167.123.127
129	10.167.123.128/32	10.167.123.128 – 10.167.123.128	10.167.123.128
130	10.167.123.129/32	10.167.123.129 – 10.167.123.129	10.167.123.129
131	10.167.123.130/32	10.167.123.130 – 10.167.123.130	10.167.123.130
132	10.167.123.131/32	10.167.123.131 – 10.167.123.131	10.167.123.131
133	10.167.123.132/32	10.167.123.132 – 10.167.123.132	10.167.123.132
134	10.167.123.133/32	10.167.123.133 – 10.167.123.133	10.167.123.133
135	10.167.123.134/32	10.167.123.134 – 10.167.123.134	10.167.123.134
136	10.167.123.135/32	10.167.123.135 – 10.167.123.135	10.167.123.135
137	10.167.123.136/32	10.167.123.136 – 10.167.123.136	10.167.123.136
138	10.167.123.137/32	10.167.123.137 – 10.167.123.137	10.167.123.137
139	10.167.123.138/32	10.167.123.138 – 10.167.123.138	10.167.123.138
140	10.167.123.139/32	10.167.123.139 – 10.167.123.139	10.167.123.139
141	10.167.123.140/32	10.167.123.140 – 10.167.123.140	10.167.123.140
142	10.167.123.141/32	10.167.123.141 – 10.167.123.141	10.167.123.141
143	10.167.123.142/32	10.167.123.142 – 10.167.123.142	10.167.123.142
144	10.167.123.143/32	10.167.123.143 – 10.167.123.143	10.167.123.143
145	10.167.123.144/32	10.167.123.144 – 10.167.123.144	10.167.123.144
146	10.167.123.145/32	10.167.123.145 – 10.167.123.145	10.167.123.145
147	10.167.123.146/32	10.167.123.146 – 10.167.123.146	10.167.123.146
148	10.167.123.147/32	10.167.123.147 – 10.167.123.147	10.167.123.147
149	10.167.123.148/32	10.167.123.148 – 10.167.123.148	10.167.123.148
150	10.167.123.149/32	10.167.123.149 – 10.167.123.149	10.167.123.149
151	10.167.123.150/32	10.167.123.150 – 10.167.123.150	10.167.123.150
152	10.167.123.151/32	10.167.123.151 – 10.167.123.151	10.167.123.151
153	10.167.123.152/32	10.167.123.152 – 10.167.123.152	10.167.123.152
154	10.167.123.153/32	10.167.123.153 – 10.167.123.153	10.167.123.153
155	10.167.123.154/32	10.167.123.154 – 10.167.123.154	10.167.123.154
156	10.167.123.155/32	10.167.123.155 – 10.167.123.155	10.167.123.155
157	10.167.123.156/32	10.167.123.156 – 10.167.123.156	10.167.123.156
158	10.167.123.157/32	10.167.123.157 – 10.167.123.157	10.167.123.157
159	10.167.123.158/32	10.167.123.158 – 10.167.123.158	10.167.123.158
160	10.167.123.159/32	10.167.123.159 – 10.167.123.159	10.167.123.159
161	10.167.123.160/32	10.167.123.160 – 10.167.123.160	10.167.123.160
162	10.167.123.161/32	10.167.123.161 – 10.167.123.161	10.167.123.161
163	10.167.123.162/32	10.167.123.162 – 10.167.123.162	10.167.123.162
164	10.167.123.163/32	10.167.123.163 – 10.167.123.163	10.167.123.163
165	10.167.123.164/32	10.167.123.164 – 10.167.123.164	10.167.123.164
166	10.167.123.165/32	10.167.123.165 – 10.167.123.165	10.167.123.165
167	10.167.123.166/32	10.167.123.166 – 10.167.123.166	10.167.123.166
168	10.167.123.167/32	10.167.123.167 – 10.167.123.167	10.167.123.167
169	10.167.123.168/32	10.167.123.168 – 10.167.123.168	10.167.123.168
170	10.167.123.169/32	10.167.123.169 – 10.167.123.169	10.167.123.169
171	10.167.123.170/32	10.167.123.170 – 10.167.123.170	10.167.123.170
172	10.167.123.171/32	10.167.123.171 – 10.167.123.171	10.167.123.171
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174	10.167.123.173/32	10.167.123.173 – 10.167.123.173	10.167.123.173
175	10.167.123.174/32	10.167.123.174 – 10.167.123.174	10.167.123.174
176	10.167.123.175/32	10.167.123.175 – 10.167.123.175	10.167.123.175
177	10.167.123.176/32	10.167.123.176 – 10.167.123.176	10.167.123.176
178	10.167.123.177/32	10.167.123.177 – 10.167.123.177	10.167.123.177
179	10.167.123.178/32	10.167.123.178 – 10.167.123.178	10.167.123.178
180	10.167.123.179/32	10.167.123.179 – 10.167.123.179	10.167.123.179
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190	10.167.123.189/32	10.167.123.189 – 10.167.123.189	10.167.123.189
191	10.167.123.190/32	10.167.123.190 – 10.167.123.190	10.167.123.190
192	10.167.123.191/32	10.167.123.191 – 10.167.123.191	10.167.123.191
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198	10.167.123.197/32	10.167.123.197 – 10.167.123.197	10.167.123.197
199	10.167.123.198/32	10.167.123.198 – 10.167.123.198	10.167.123.198
200	10.167.123.199/32	10.167.123.199 – 10.167.123.199	10.167.123.199
201	10.167.123.200/32	10.167.123.200 – 10.167.123.200	10.167.123.200
202	10.167.123.201/32	10.167.123.201 – 10.167.123.201	10.167.123.201
203	10.167.123.202/32	10.167.123.202 – 10.167.123.202	10.167.123.202
204	10.167.123.203/32	10.167.123.203 – 10.167.123.203	10.167.123.203
205	10.167.123.204/32	10.167.123.204 – 10.167.123.204	10.167.123.204
206	10.167.123.205/32	10.167.123.205 – 10.167.123.205	10.167.123.205
207	10.167.123.206/32	10.167.123.206 – 10.167.123.206	10.167.123.206
208	10.167.123.207/32	10.167.123.207 – 10.167.123.207	10.167.123.207
209	10.167.123.208/32	10.167.123.208 – 10.167.123.208	10.167.123.208
210	10.167.123.209/32	10.167.123.209 – 10.167.123.209	10.167.123.209
211	10.167.123.210/32	10.167.123.210 – 10.167.123.210	10.167.123.210
212	10.167.123.211/32	10.167.123.211 – 10.167.123.211	10.167.123.211
213	10.167.123.212/32	10.167.123.212 – 10.167.123.212	10.167.123.212
214	10.167.123.213/32	10.167.123.213 – 10.167.123.213	10.167.123.213
215	10.167.123.214/32	10.167.123.214 – 10.167.123.214	10.167.123.214
216	10.167.123.215/32	10.167.123.215 – 10.167.123.215	10.167.123.215
217	10.167.123.216/32	10.167.123.216 – 10.167.123.216	10.167.123.216
218	10.167.123.217/32	10.167.123.217 – 10.167.123.217	10.167.123.217
219	10.167.123.218/32	10.167.123.218 – 10.167.123.218	10.167.123.218
220	10.167.123.219/32	10.167.123.219 – 10.167.123.219	10.167.123.219
221	10.167.123.220/32	10.167.123.220 – 10.167.123.220	10.167.123.220
222	10.167.123.221/32	10.167.123.221 – 10.167.123.221	10.167.123.221
223	10.167.123.222/32	10.167.123.222 – 10.167.123.222	10.167.123.222
224	10.167.123.223/32	10.167.123.223 – 10.167.123.223	10.167.123.223
225	10.167.123.224/32	10.167.123.224 – 10.167.123.224	10.167.123.224
226	10.167.123.225/32	10.167.123.225 – 10.167.123.225	10.167.123.225
227	10.167.123.226/32	10.167.123.226 – 10.167.123.226	10.167.123.226
228	10.167.123.227/32	10.167.123.227 – 10.167.123.227	10.167.123.227
229	10.167.123.228/32	10.167.123.228 – 10.167.123.228	10.167.123.228
230	10.167.123.229/32	10.167.123.229 – 10.167.123.229	10.167.123.229
231	10.167.123.230/32	10.167.123.230 – 10.167.123.230	10.167.123.230
232	10.167.123.231/32	10.167.123.231 – 10.167.123.231	10.167.123.231
233	10.167.123.232/32	10.167.123.232 – 10.167.123.232	10.167.123.232
234	10.167.123.233/32	10.167.123.233 – 10.167.123.233	10.167.123.233
235	10.167.123.234/32	10.167.123.234 – 10.167.123.234	10.167.123.234
236	10.167.123.235/32	10.167.123.235 – 10.167.123.235	10.167.123.235
237	10.167.123.236/32	10.167.123.236 – 10.167.123.236	10.167.123.236
238	10.167.123.237/32	10.167.123.237 – 10.167.123.237	10.167.123.237
239	10.167.123.238/32	10.167.123.238 – 10.167.123.238	10.167.123.238
240	10.167.123.239/32	10.167.123.239 – 10.167.123.239	10.167.123.239
241	10.167.123.240/32	10.167.123.240 – 10.167.123.240	10.167.123.240
242	10.167.123.241/32	10.167.123.241 – 10.167.123.241	10.167.123.241
243	10.167.123.242/32	10.167.123.242 – 10.167.123.242	10.167.123.242
244	10.167.123.243/32	10.167.123.243 – 10.167.123.243	10.167.123.243
245	10.167.123.244/32	10.167.123.244 – 10.167.123.244	10.167.123.244
246	10.167.123.245/32	10.167.123.245 – 10.167.123.245	10.167.123.245
247	10.167.123.246/32	10.167.123.246 – 10.167.123.246	10.167.123.246
248	10.167.123.247/32	10.167.123.247 – 10.167.123.247	10.167.123.247
249	10.167.123.248/32	10.167.123.248 – 10.167.123.248	10.167.123.248
250	10.167.123.249/32	10.167.123.249 – 10.167.123.249	10.167.123.249
251	10.167.123.250/32	10.167.123.250 – 10.167.123.250	10.167.123.250
252	10.167.123.251/32	10.167.123.251 – 10.167.123.251	10.167.123.251
253	10.167.123.252/32	10.167.123.252 – 10.167.123.252	10.167.123.252
254	10.167.123.253/32	10.167.123.253 – 10.167.123.253	10.167.123.253
255	10.167.123.254/32	10.167.123.254 – 10.167.123.254	10.167.123.254
256	10.167.123.255/32	10.167.123.255 – 10.167.123.255	10.167.123.255

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 →