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)10.0.162.0/24

network10.0.162.0/24

broadcast10.0.162.255

first host10.0.162.1

last host10.0.162.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.162.0/24

address00001010.00000000.10100010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.10100010.00000000

broadcast00001010.00000000.10100010.11111111

green = network part, grey = host part

hex0x0a00a200

decimal167813632

reverse dns0.162.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:a200

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.162.0/32	10.0.162.0 – 10.0.162.0	10.0.162.0
2	10.0.162.1/32	10.0.162.1 – 10.0.162.1	10.0.162.1
3	10.0.162.2/32	10.0.162.2 – 10.0.162.2	10.0.162.2
4	10.0.162.3/32	10.0.162.3 – 10.0.162.3	10.0.162.3
5	10.0.162.4/32	10.0.162.4 – 10.0.162.4	10.0.162.4
6	10.0.162.5/32	10.0.162.5 – 10.0.162.5	10.0.162.5
7	10.0.162.6/32	10.0.162.6 – 10.0.162.6	10.0.162.6
8	10.0.162.7/32	10.0.162.7 – 10.0.162.7	10.0.162.7
9	10.0.162.8/32	10.0.162.8 – 10.0.162.8	10.0.162.8
10	10.0.162.9/32	10.0.162.9 – 10.0.162.9	10.0.162.9
11	10.0.162.10/32	10.0.162.10 – 10.0.162.10	10.0.162.10
12	10.0.162.11/32	10.0.162.11 – 10.0.162.11	10.0.162.11
13	10.0.162.12/32	10.0.162.12 – 10.0.162.12	10.0.162.12
14	10.0.162.13/32	10.0.162.13 – 10.0.162.13	10.0.162.13
15	10.0.162.14/32	10.0.162.14 – 10.0.162.14	10.0.162.14
16	10.0.162.15/32	10.0.162.15 – 10.0.162.15	10.0.162.15
17	10.0.162.16/32	10.0.162.16 – 10.0.162.16	10.0.162.16
18	10.0.162.17/32	10.0.162.17 – 10.0.162.17	10.0.162.17
19	10.0.162.18/32	10.0.162.18 – 10.0.162.18	10.0.162.18
20	10.0.162.19/32	10.0.162.19 – 10.0.162.19	10.0.162.19
21	10.0.162.20/32	10.0.162.20 – 10.0.162.20	10.0.162.20
22	10.0.162.21/32	10.0.162.21 – 10.0.162.21	10.0.162.21
23	10.0.162.22/32	10.0.162.22 – 10.0.162.22	10.0.162.22
24	10.0.162.23/32	10.0.162.23 – 10.0.162.23	10.0.162.23
25	10.0.162.24/32	10.0.162.24 – 10.0.162.24	10.0.162.24
26	10.0.162.25/32	10.0.162.25 – 10.0.162.25	10.0.162.25
27	10.0.162.26/32	10.0.162.26 – 10.0.162.26	10.0.162.26
28	10.0.162.27/32	10.0.162.27 – 10.0.162.27	10.0.162.27
29	10.0.162.28/32	10.0.162.28 – 10.0.162.28	10.0.162.28
30	10.0.162.29/32	10.0.162.29 – 10.0.162.29	10.0.162.29
31	10.0.162.30/32	10.0.162.30 – 10.0.162.30	10.0.162.30
32	10.0.162.31/32	10.0.162.31 – 10.0.162.31	10.0.162.31
33	10.0.162.32/32	10.0.162.32 – 10.0.162.32	10.0.162.32
34	10.0.162.33/32	10.0.162.33 – 10.0.162.33	10.0.162.33
35	10.0.162.34/32	10.0.162.34 – 10.0.162.34	10.0.162.34
36	10.0.162.35/32	10.0.162.35 – 10.0.162.35	10.0.162.35
37	10.0.162.36/32	10.0.162.36 – 10.0.162.36	10.0.162.36
38	10.0.162.37/32	10.0.162.37 – 10.0.162.37	10.0.162.37
39	10.0.162.38/32	10.0.162.38 – 10.0.162.38	10.0.162.38
40	10.0.162.39/32	10.0.162.39 – 10.0.162.39	10.0.162.39
41	10.0.162.40/32	10.0.162.40 – 10.0.162.40	10.0.162.40
42	10.0.162.41/32	10.0.162.41 – 10.0.162.41	10.0.162.41
43	10.0.162.42/32	10.0.162.42 – 10.0.162.42	10.0.162.42
44	10.0.162.43/32	10.0.162.43 – 10.0.162.43	10.0.162.43
45	10.0.162.44/32	10.0.162.44 – 10.0.162.44	10.0.162.44
46	10.0.162.45/32	10.0.162.45 – 10.0.162.45	10.0.162.45
47	10.0.162.46/32	10.0.162.46 – 10.0.162.46	10.0.162.46
48	10.0.162.47/32	10.0.162.47 – 10.0.162.47	10.0.162.47
49	10.0.162.48/32	10.0.162.48 – 10.0.162.48	10.0.162.48
50	10.0.162.49/32	10.0.162.49 – 10.0.162.49	10.0.162.49
51	10.0.162.50/32	10.0.162.50 – 10.0.162.50	10.0.162.50
52	10.0.162.51/32	10.0.162.51 – 10.0.162.51	10.0.162.51
53	10.0.162.52/32	10.0.162.52 – 10.0.162.52	10.0.162.52
54	10.0.162.53/32	10.0.162.53 – 10.0.162.53	10.0.162.53
55	10.0.162.54/32	10.0.162.54 – 10.0.162.54	10.0.162.54
56	10.0.162.55/32	10.0.162.55 – 10.0.162.55	10.0.162.55
57	10.0.162.56/32	10.0.162.56 – 10.0.162.56	10.0.162.56
58	10.0.162.57/32	10.0.162.57 – 10.0.162.57	10.0.162.57
59	10.0.162.58/32	10.0.162.58 – 10.0.162.58	10.0.162.58
60	10.0.162.59/32	10.0.162.59 – 10.0.162.59	10.0.162.59
61	10.0.162.60/32	10.0.162.60 – 10.0.162.60	10.0.162.60
62	10.0.162.61/32	10.0.162.61 – 10.0.162.61	10.0.162.61
63	10.0.162.62/32	10.0.162.62 – 10.0.162.62	10.0.162.62
64	10.0.162.63/32	10.0.162.63 – 10.0.162.63	10.0.162.63
65	10.0.162.64/32	10.0.162.64 – 10.0.162.64	10.0.162.64
66	10.0.162.65/32	10.0.162.65 – 10.0.162.65	10.0.162.65
67	10.0.162.66/32	10.0.162.66 – 10.0.162.66	10.0.162.66
68	10.0.162.67/32	10.0.162.67 – 10.0.162.67	10.0.162.67
69	10.0.162.68/32	10.0.162.68 – 10.0.162.68	10.0.162.68
70	10.0.162.69/32	10.0.162.69 – 10.0.162.69	10.0.162.69
71	10.0.162.70/32	10.0.162.70 – 10.0.162.70	10.0.162.70
72	10.0.162.71/32	10.0.162.71 – 10.0.162.71	10.0.162.71
73	10.0.162.72/32	10.0.162.72 – 10.0.162.72	10.0.162.72
74	10.0.162.73/32	10.0.162.73 – 10.0.162.73	10.0.162.73
75	10.0.162.74/32	10.0.162.74 – 10.0.162.74	10.0.162.74
76	10.0.162.75/32	10.0.162.75 – 10.0.162.75	10.0.162.75
77	10.0.162.76/32	10.0.162.76 – 10.0.162.76	10.0.162.76
78	10.0.162.77/32	10.0.162.77 – 10.0.162.77	10.0.162.77
79	10.0.162.78/32	10.0.162.78 – 10.0.162.78	10.0.162.78
80	10.0.162.79/32	10.0.162.79 – 10.0.162.79	10.0.162.79
81	10.0.162.80/32	10.0.162.80 – 10.0.162.80	10.0.162.80
82	10.0.162.81/32	10.0.162.81 – 10.0.162.81	10.0.162.81
83	10.0.162.82/32	10.0.162.82 – 10.0.162.82	10.0.162.82
84	10.0.162.83/32	10.0.162.83 – 10.0.162.83	10.0.162.83
85	10.0.162.84/32	10.0.162.84 – 10.0.162.84	10.0.162.84
86	10.0.162.85/32	10.0.162.85 – 10.0.162.85	10.0.162.85
87	10.0.162.86/32	10.0.162.86 – 10.0.162.86	10.0.162.86
88	10.0.162.87/32	10.0.162.87 – 10.0.162.87	10.0.162.87
89	10.0.162.88/32	10.0.162.88 – 10.0.162.88	10.0.162.88
90	10.0.162.89/32	10.0.162.89 – 10.0.162.89	10.0.162.89
91	10.0.162.90/32	10.0.162.90 – 10.0.162.90	10.0.162.90
92	10.0.162.91/32	10.0.162.91 – 10.0.162.91	10.0.162.91
93	10.0.162.92/32	10.0.162.92 – 10.0.162.92	10.0.162.92
94	10.0.162.93/32	10.0.162.93 – 10.0.162.93	10.0.162.93
95	10.0.162.94/32	10.0.162.94 – 10.0.162.94	10.0.162.94
96	10.0.162.95/32	10.0.162.95 – 10.0.162.95	10.0.162.95
97	10.0.162.96/32	10.0.162.96 – 10.0.162.96	10.0.162.96
98	10.0.162.97/32	10.0.162.97 – 10.0.162.97	10.0.162.97
99	10.0.162.98/32	10.0.162.98 – 10.0.162.98	10.0.162.98
100	10.0.162.99/32	10.0.162.99 – 10.0.162.99	10.0.162.99
101	10.0.162.100/32	10.0.162.100 – 10.0.162.100	10.0.162.100
102	10.0.162.101/32	10.0.162.101 – 10.0.162.101	10.0.162.101
103	10.0.162.102/32	10.0.162.102 – 10.0.162.102	10.0.162.102
104	10.0.162.103/32	10.0.162.103 – 10.0.162.103	10.0.162.103
105	10.0.162.104/32	10.0.162.104 – 10.0.162.104	10.0.162.104
106	10.0.162.105/32	10.0.162.105 – 10.0.162.105	10.0.162.105
107	10.0.162.106/32	10.0.162.106 – 10.0.162.106	10.0.162.106
108	10.0.162.107/32	10.0.162.107 – 10.0.162.107	10.0.162.107
109	10.0.162.108/32	10.0.162.108 – 10.0.162.108	10.0.162.108
110	10.0.162.109/32	10.0.162.109 – 10.0.162.109	10.0.162.109
111	10.0.162.110/32	10.0.162.110 – 10.0.162.110	10.0.162.110
112	10.0.162.111/32	10.0.162.111 – 10.0.162.111	10.0.162.111
113	10.0.162.112/32	10.0.162.112 – 10.0.162.112	10.0.162.112
114	10.0.162.113/32	10.0.162.113 – 10.0.162.113	10.0.162.113
115	10.0.162.114/32	10.0.162.114 – 10.0.162.114	10.0.162.114
116	10.0.162.115/32	10.0.162.115 – 10.0.162.115	10.0.162.115
117	10.0.162.116/32	10.0.162.116 – 10.0.162.116	10.0.162.116
118	10.0.162.117/32	10.0.162.117 – 10.0.162.117	10.0.162.117
119	10.0.162.118/32	10.0.162.118 – 10.0.162.118	10.0.162.118
120	10.0.162.119/32	10.0.162.119 – 10.0.162.119	10.0.162.119
121	10.0.162.120/32	10.0.162.120 – 10.0.162.120	10.0.162.120
122	10.0.162.121/32	10.0.162.121 – 10.0.162.121	10.0.162.121
123	10.0.162.122/32	10.0.162.122 – 10.0.162.122	10.0.162.122
124	10.0.162.123/32	10.0.162.123 – 10.0.162.123	10.0.162.123
125	10.0.162.124/32	10.0.162.124 – 10.0.162.124	10.0.162.124
126	10.0.162.125/32	10.0.162.125 – 10.0.162.125	10.0.162.125
127	10.0.162.126/32	10.0.162.126 – 10.0.162.126	10.0.162.126
128	10.0.162.127/32	10.0.162.127 – 10.0.162.127	10.0.162.127
129	10.0.162.128/32	10.0.162.128 – 10.0.162.128	10.0.162.128
130	10.0.162.129/32	10.0.162.129 – 10.0.162.129	10.0.162.129
131	10.0.162.130/32	10.0.162.130 – 10.0.162.130	10.0.162.130
132	10.0.162.131/32	10.0.162.131 – 10.0.162.131	10.0.162.131
133	10.0.162.132/32	10.0.162.132 – 10.0.162.132	10.0.162.132
134	10.0.162.133/32	10.0.162.133 – 10.0.162.133	10.0.162.133
135	10.0.162.134/32	10.0.162.134 – 10.0.162.134	10.0.162.134
136	10.0.162.135/32	10.0.162.135 – 10.0.162.135	10.0.162.135
137	10.0.162.136/32	10.0.162.136 – 10.0.162.136	10.0.162.136
138	10.0.162.137/32	10.0.162.137 – 10.0.162.137	10.0.162.137
139	10.0.162.138/32	10.0.162.138 – 10.0.162.138	10.0.162.138
140	10.0.162.139/32	10.0.162.139 – 10.0.162.139	10.0.162.139
141	10.0.162.140/32	10.0.162.140 – 10.0.162.140	10.0.162.140
142	10.0.162.141/32	10.0.162.141 – 10.0.162.141	10.0.162.141
143	10.0.162.142/32	10.0.162.142 – 10.0.162.142	10.0.162.142
144	10.0.162.143/32	10.0.162.143 – 10.0.162.143	10.0.162.143
145	10.0.162.144/32	10.0.162.144 – 10.0.162.144	10.0.162.144
146	10.0.162.145/32	10.0.162.145 – 10.0.162.145	10.0.162.145
147	10.0.162.146/32	10.0.162.146 – 10.0.162.146	10.0.162.146
148	10.0.162.147/32	10.0.162.147 – 10.0.162.147	10.0.162.147
149	10.0.162.148/32	10.0.162.148 – 10.0.162.148	10.0.162.148
150	10.0.162.149/32	10.0.162.149 – 10.0.162.149	10.0.162.149
151	10.0.162.150/32	10.0.162.150 – 10.0.162.150	10.0.162.150
152	10.0.162.151/32	10.0.162.151 – 10.0.162.151	10.0.162.151
153	10.0.162.152/32	10.0.162.152 – 10.0.162.152	10.0.162.152
154	10.0.162.153/32	10.0.162.153 – 10.0.162.153	10.0.162.153
155	10.0.162.154/32	10.0.162.154 – 10.0.162.154	10.0.162.154
156	10.0.162.155/32	10.0.162.155 – 10.0.162.155	10.0.162.155
157	10.0.162.156/32	10.0.162.156 – 10.0.162.156	10.0.162.156
158	10.0.162.157/32	10.0.162.157 – 10.0.162.157	10.0.162.157
159	10.0.162.158/32	10.0.162.158 – 10.0.162.158	10.0.162.158
160	10.0.162.159/32	10.0.162.159 – 10.0.162.159	10.0.162.159
161	10.0.162.160/32	10.0.162.160 – 10.0.162.160	10.0.162.160
162	10.0.162.161/32	10.0.162.161 – 10.0.162.161	10.0.162.161
163	10.0.162.162/32	10.0.162.162 – 10.0.162.162	10.0.162.162
164	10.0.162.163/32	10.0.162.163 – 10.0.162.163	10.0.162.163
165	10.0.162.164/32	10.0.162.164 – 10.0.162.164	10.0.162.164
166	10.0.162.165/32	10.0.162.165 – 10.0.162.165	10.0.162.165
167	10.0.162.166/32	10.0.162.166 – 10.0.162.166	10.0.162.166
168	10.0.162.167/32	10.0.162.167 – 10.0.162.167	10.0.162.167
169	10.0.162.168/32	10.0.162.168 – 10.0.162.168	10.0.162.168
170	10.0.162.169/32	10.0.162.169 – 10.0.162.169	10.0.162.169
171	10.0.162.170/32	10.0.162.170 – 10.0.162.170	10.0.162.170
172	10.0.162.171/32	10.0.162.171 – 10.0.162.171	10.0.162.171
173	10.0.162.172/32	10.0.162.172 – 10.0.162.172	10.0.162.172
174	10.0.162.173/32	10.0.162.173 – 10.0.162.173	10.0.162.173
175	10.0.162.174/32	10.0.162.174 – 10.0.162.174	10.0.162.174
176	10.0.162.175/32	10.0.162.175 – 10.0.162.175	10.0.162.175
177	10.0.162.176/32	10.0.162.176 – 10.0.162.176	10.0.162.176
178	10.0.162.177/32	10.0.162.177 – 10.0.162.177	10.0.162.177
179	10.0.162.178/32	10.0.162.178 – 10.0.162.178	10.0.162.178
180	10.0.162.179/32	10.0.162.179 – 10.0.162.179	10.0.162.179
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198	10.0.162.197/32	10.0.162.197 – 10.0.162.197	10.0.162.197
199	10.0.162.198/32	10.0.162.198 – 10.0.162.198	10.0.162.198
200	10.0.162.199/32	10.0.162.199 – 10.0.162.199	10.0.162.199
201	10.0.162.200/32	10.0.162.200 – 10.0.162.200	10.0.162.200
202	10.0.162.201/32	10.0.162.201 – 10.0.162.201	10.0.162.201
203	10.0.162.202/32	10.0.162.202 – 10.0.162.202	10.0.162.202
204	10.0.162.203/32	10.0.162.203 – 10.0.162.203	10.0.162.203
205	10.0.162.204/32	10.0.162.204 – 10.0.162.204	10.0.162.204
206	10.0.162.205/32	10.0.162.205 – 10.0.162.205	10.0.162.205
207	10.0.162.206/32	10.0.162.206 – 10.0.162.206	10.0.162.206
208	10.0.162.207/32	10.0.162.207 – 10.0.162.207	10.0.162.207
209	10.0.162.208/32	10.0.162.208 – 10.0.162.208	10.0.162.208
210	10.0.162.209/32	10.0.162.209 – 10.0.162.209	10.0.162.209
211	10.0.162.210/32	10.0.162.210 – 10.0.162.210	10.0.162.210
212	10.0.162.211/32	10.0.162.211 – 10.0.162.211	10.0.162.211
213	10.0.162.212/32	10.0.162.212 – 10.0.162.212	10.0.162.212
214	10.0.162.213/32	10.0.162.213 – 10.0.162.213	10.0.162.213
215	10.0.162.214/32	10.0.162.214 – 10.0.162.214	10.0.162.214
216	10.0.162.215/32	10.0.162.215 – 10.0.162.215	10.0.162.215
217	10.0.162.216/32	10.0.162.216 – 10.0.162.216	10.0.162.216
218	10.0.162.217/32	10.0.162.217 – 10.0.162.217	10.0.162.217
219	10.0.162.218/32	10.0.162.218 – 10.0.162.218	10.0.162.218
220	10.0.162.219/32	10.0.162.219 – 10.0.162.219	10.0.162.219
221	10.0.162.220/32	10.0.162.220 – 10.0.162.220	10.0.162.220
222	10.0.162.221/32	10.0.162.221 – 10.0.162.221	10.0.162.221
223	10.0.162.222/32	10.0.162.222 – 10.0.162.222	10.0.162.222
224	10.0.162.223/32	10.0.162.223 – 10.0.162.223	10.0.162.223
225	10.0.162.224/32	10.0.162.224 – 10.0.162.224	10.0.162.224
226	10.0.162.225/32	10.0.162.225 – 10.0.162.225	10.0.162.225
227	10.0.162.226/32	10.0.162.226 – 10.0.162.226	10.0.162.226
228	10.0.162.227/32	10.0.162.227 – 10.0.162.227	10.0.162.227
229	10.0.162.228/32	10.0.162.228 – 10.0.162.228	10.0.162.228
230	10.0.162.229/32	10.0.162.229 – 10.0.162.229	10.0.162.229
231	10.0.162.230/32	10.0.162.230 – 10.0.162.230	10.0.162.230
232	10.0.162.231/32	10.0.162.231 – 10.0.162.231	10.0.162.231
233	10.0.162.232/32	10.0.162.232 – 10.0.162.232	10.0.162.232
234	10.0.162.233/32	10.0.162.233 – 10.0.162.233	10.0.162.233
235	10.0.162.234/32	10.0.162.234 – 10.0.162.234	10.0.162.234
236	10.0.162.235/32	10.0.162.235 – 10.0.162.235	10.0.162.235
237	10.0.162.236/32	10.0.162.236 – 10.0.162.236	10.0.162.236
238	10.0.162.237/32	10.0.162.237 – 10.0.162.237	10.0.162.237
239	10.0.162.238/32	10.0.162.238 – 10.0.162.238	10.0.162.238
240	10.0.162.239/32	10.0.162.239 – 10.0.162.239	10.0.162.239
241	10.0.162.240/32	10.0.162.240 – 10.0.162.240	10.0.162.240
242	10.0.162.241/32	10.0.162.241 – 10.0.162.241	10.0.162.241
243	10.0.162.242/32	10.0.162.242 – 10.0.162.242	10.0.162.242
244	10.0.162.243/32	10.0.162.243 – 10.0.162.243	10.0.162.243
245	10.0.162.244/32	10.0.162.244 – 10.0.162.244	10.0.162.244
246	10.0.162.245/32	10.0.162.245 – 10.0.162.245	10.0.162.245
247	10.0.162.246/32	10.0.162.246 – 10.0.162.246	10.0.162.246
248	10.0.162.247/32	10.0.162.247 – 10.0.162.247	10.0.162.247
249	10.0.162.248/32	10.0.162.248 – 10.0.162.248	10.0.162.248
250	10.0.162.249/32	10.0.162.249 – 10.0.162.249	10.0.162.249
251	10.0.162.250/32	10.0.162.250 – 10.0.162.250	10.0.162.250
252	10.0.162.251/32	10.0.162.251 – 10.0.162.251	10.0.162.251
253	10.0.162.252/32	10.0.162.252 – 10.0.162.252	10.0.162.252
254	10.0.162.253/32	10.0.162.253 – 10.0.162.253	10.0.162.253
255	10.0.162.254/32	10.0.162.254 – 10.0.162.254	10.0.162.254
256	10.0.162.255/32	10.0.162.255 – 10.0.162.255	10.0.162.255

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 →