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)10.0.83.0/24

network10.0.83.0/24

broadcast10.0.83.255

first host10.0.83.1

last host10.0.83.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.83.0/24

address00001010.00000000.01010011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01010011.00000000

broadcast00001010.00000000.01010011.11111111

green = network part, grey = host part

hex0x0a005300

decimal167793408

reverse dns0.83.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:5300

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.83.0/32	10.0.83.0 – 10.0.83.0	10.0.83.0
2	10.0.83.1/32	10.0.83.1 – 10.0.83.1	10.0.83.1
3	10.0.83.2/32	10.0.83.2 – 10.0.83.2	10.0.83.2
4	10.0.83.3/32	10.0.83.3 – 10.0.83.3	10.0.83.3
5	10.0.83.4/32	10.0.83.4 – 10.0.83.4	10.0.83.4
6	10.0.83.5/32	10.0.83.5 – 10.0.83.5	10.0.83.5
7	10.0.83.6/32	10.0.83.6 – 10.0.83.6	10.0.83.6
8	10.0.83.7/32	10.0.83.7 – 10.0.83.7	10.0.83.7
9	10.0.83.8/32	10.0.83.8 – 10.0.83.8	10.0.83.8
10	10.0.83.9/32	10.0.83.9 – 10.0.83.9	10.0.83.9
11	10.0.83.10/32	10.0.83.10 – 10.0.83.10	10.0.83.10
12	10.0.83.11/32	10.0.83.11 – 10.0.83.11	10.0.83.11
13	10.0.83.12/32	10.0.83.12 – 10.0.83.12	10.0.83.12
14	10.0.83.13/32	10.0.83.13 – 10.0.83.13	10.0.83.13
15	10.0.83.14/32	10.0.83.14 – 10.0.83.14	10.0.83.14
16	10.0.83.15/32	10.0.83.15 – 10.0.83.15	10.0.83.15
17	10.0.83.16/32	10.0.83.16 – 10.0.83.16	10.0.83.16
18	10.0.83.17/32	10.0.83.17 – 10.0.83.17	10.0.83.17
19	10.0.83.18/32	10.0.83.18 – 10.0.83.18	10.0.83.18
20	10.0.83.19/32	10.0.83.19 – 10.0.83.19	10.0.83.19
21	10.0.83.20/32	10.0.83.20 – 10.0.83.20	10.0.83.20
22	10.0.83.21/32	10.0.83.21 – 10.0.83.21	10.0.83.21
23	10.0.83.22/32	10.0.83.22 – 10.0.83.22	10.0.83.22
24	10.0.83.23/32	10.0.83.23 – 10.0.83.23	10.0.83.23
25	10.0.83.24/32	10.0.83.24 – 10.0.83.24	10.0.83.24
26	10.0.83.25/32	10.0.83.25 – 10.0.83.25	10.0.83.25
27	10.0.83.26/32	10.0.83.26 – 10.0.83.26	10.0.83.26
28	10.0.83.27/32	10.0.83.27 – 10.0.83.27	10.0.83.27
29	10.0.83.28/32	10.0.83.28 – 10.0.83.28	10.0.83.28
30	10.0.83.29/32	10.0.83.29 – 10.0.83.29	10.0.83.29
31	10.0.83.30/32	10.0.83.30 – 10.0.83.30	10.0.83.30
32	10.0.83.31/32	10.0.83.31 – 10.0.83.31	10.0.83.31
33	10.0.83.32/32	10.0.83.32 – 10.0.83.32	10.0.83.32
34	10.0.83.33/32	10.0.83.33 – 10.0.83.33	10.0.83.33
35	10.0.83.34/32	10.0.83.34 – 10.0.83.34	10.0.83.34
36	10.0.83.35/32	10.0.83.35 – 10.0.83.35	10.0.83.35
37	10.0.83.36/32	10.0.83.36 – 10.0.83.36	10.0.83.36
38	10.0.83.37/32	10.0.83.37 – 10.0.83.37	10.0.83.37
39	10.0.83.38/32	10.0.83.38 – 10.0.83.38	10.0.83.38
40	10.0.83.39/32	10.0.83.39 – 10.0.83.39	10.0.83.39
41	10.0.83.40/32	10.0.83.40 – 10.0.83.40	10.0.83.40
42	10.0.83.41/32	10.0.83.41 – 10.0.83.41	10.0.83.41
43	10.0.83.42/32	10.0.83.42 – 10.0.83.42	10.0.83.42
44	10.0.83.43/32	10.0.83.43 – 10.0.83.43	10.0.83.43
45	10.0.83.44/32	10.0.83.44 – 10.0.83.44	10.0.83.44
46	10.0.83.45/32	10.0.83.45 – 10.0.83.45	10.0.83.45
47	10.0.83.46/32	10.0.83.46 – 10.0.83.46	10.0.83.46
48	10.0.83.47/32	10.0.83.47 – 10.0.83.47	10.0.83.47
49	10.0.83.48/32	10.0.83.48 – 10.0.83.48	10.0.83.48
50	10.0.83.49/32	10.0.83.49 – 10.0.83.49	10.0.83.49
51	10.0.83.50/32	10.0.83.50 – 10.0.83.50	10.0.83.50
52	10.0.83.51/32	10.0.83.51 – 10.0.83.51	10.0.83.51
53	10.0.83.52/32	10.0.83.52 – 10.0.83.52	10.0.83.52
54	10.0.83.53/32	10.0.83.53 – 10.0.83.53	10.0.83.53
55	10.0.83.54/32	10.0.83.54 – 10.0.83.54	10.0.83.54
56	10.0.83.55/32	10.0.83.55 – 10.0.83.55	10.0.83.55
57	10.0.83.56/32	10.0.83.56 – 10.0.83.56	10.0.83.56
58	10.0.83.57/32	10.0.83.57 – 10.0.83.57	10.0.83.57
59	10.0.83.58/32	10.0.83.58 – 10.0.83.58	10.0.83.58
60	10.0.83.59/32	10.0.83.59 – 10.0.83.59	10.0.83.59
61	10.0.83.60/32	10.0.83.60 – 10.0.83.60	10.0.83.60
62	10.0.83.61/32	10.0.83.61 – 10.0.83.61	10.0.83.61
63	10.0.83.62/32	10.0.83.62 – 10.0.83.62	10.0.83.62
64	10.0.83.63/32	10.0.83.63 – 10.0.83.63	10.0.83.63
65	10.0.83.64/32	10.0.83.64 – 10.0.83.64	10.0.83.64
66	10.0.83.65/32	10.0.83.65 – 10.0.83.65	10.0.83.65
67	10.0.83.66/32	10.0.83.66 – 10.0.83.66	10.0.83.66
68	10.0.83.67/32	10.0.83.67 – 10.0.83.67	10.0.83.67
69	10.0.83.68/32	10.0.83.68 – 10.0.83.68	10.0.83.68
70	10.0.83.69/32	10.0.83.69 – 10.0.83.69	10.0.83.69
71	10.0.83.70/32	10.0.83.70 – 10.0.83.70	10.0.83.70
72	10.0.83.71/32	10.0.83.71 – 10.0.83.71	10.0.83.71
73	10.0.83.72/32	10.0.83.72 – 10.0.83.72	10.0.83.72
74	10.0.83.73/32	10.0.83.73 – 10.0.83.73	10.0.83.73
75	10.0.83.74/32	10.0.83.74 – 10.0.83.74	10.0.83.74
76	10.0.83.75/32	10.0.83.75 – 10.0.83.75	10.0.83.75
77	10.0.83.76/32	10.0.83.76 – 10.0.83.76	10.0.83.76
78	10.0.83.77/32	10.0.83.77 – 10.0.83.77	10.0.83.77
79	10.0.83.78/32	10.0.83.78 – 10.0.83.78	10.0.83.78
80	10.0.83.79/32	10.0.83.79 – 10.0.83.79	10.0.83.79
81	10.0.83.80/32	10.0.83.80 – 10.0.83.80	10.0.83.80
82	10.0.83.81/32	10.0.83.81 – 10.0.83.81	10.0.83.81
83	10.0.83.82/32	10.0.83.82 – 10.0.83.82	10.0.83.82
84	10.0.83.83/32	10.0.83.83 – 10.0.83.83	10.0.83.83
85	10.0.83.84/32	10.0.83.84 – 10.0.83.84	10.0.83.84
86	10.0.83.85/32	10.0.83.85 – 10.0.83.85	10.0.83.85
87	10.0.83.86/32	10.0.83.86 – 10.0.83.86	10.0.83.86
88	10.0.83.87/32	10.0.83.87 – 10.0.83.87	10.0.83.87
89	10.0.83.88/32	10.0.83.88 – 10.0.83.88	10.0.83.88
90	10.0.83.89/32	10.0.83.89 – 10.0.83.89	10.0.83.89
91	10.0.83.90/32	10.0.83.90 – 10.0.83.90	10.0.83.90
92	10.0.83.91/32	10.0.83.91 – 10.0.83.91	10.0.83.91
93	10.0.83.92/32	10.0.83.92 – 10.0.83.92	10.0.83.92
94	10.0.83.93/32	10.0.83.93 – 10.0.83.93	10.0.83.93
95	10.0.83.94/32	10.0.83.94 – 10.0.83.94	10.0.83.94
96	10.0.83.95/32	10.0.83.95 – 10.0.83.95	10.0.83.95
97	10.0.83.96/32	10.0.83.96 – 10.0.83.96	10.0.83.96
98	10.0.83.97/32	10.0.83.97 – 10.0.83.97	10.0.83.97
99	10.0.83.98/32	10.0.83.98 – 10.0.83.98	10.0.83.98
100	10.0.83.99/32	10.0.83.99 – 10.0.83.99	10.0.83.99
101	10.0.83.100/32	10.0.83.100 – 10.0.83.100	10.0.83.100
102	10.0.83.101/32	10.0.83.101 – 10.0.83.101	10.0.83.101
103	10.0.83.102/32	10.0.83.102 – 10.0.83.102	10.0.83.102
104	10.0.83.103/32	10.0.83.103 – 10.0.83.103	10.0.83.103
105	10.0.83.104/32	10.0.83.104 – 10.0.83.104	10.0.83.104
106	10.0.83.105/32	10.0.83.105 – 10.0.83.105	10.0.83.105
107	10.0.83.106/32	10.0.83.106 – 10.0.83.106	10.0.83.106
108	10.0.83.107/32	10.0.83.107 – 10.0.83.107	10.0.83.107
109	10.0.83.108/32	10.0.83.108 – 10.0.83.108	10.0.83.108
110	10.0.83.109/32	10.0.83.109 – 10.0.83.109	10.0.83.109
111	10.0.83.110/32	10.0.83.110 – 10.0.83.110	10.0.83.110
112	10.0.83.111/32	10.0.83.111 – 10.0.83.111	10.0.83.111
113	10.0.83.112/32	10.0.83.112 – 10.0.83.112	10.0.83.112
114	10.0.83.113/32	10.0.83.113 – 10.0.83.113	10.0.83.113
115	10.0.83.114/32	10.0.83.114 – 10.0.83.114	10.0.83.114
116	10.0.83.115/32	10.0.83.115 – 10.0.83.115	10.0.83.115
117	10.0.83.116/32	10.0.83.116 – 10.0.83.116	10.0.83.116
118	10.0.83.117/32	10.0.83.117 – 10.0.83.117	10.0.83.117
119	10.0.83.118/32	10.0.83.118 – 10.0.83.118	10.0.83.118
120	10.0.83.119/32	10.0.83.119 – 10.0.83.119	10.0.83.119
121	10.0.83.120/32	10.0.83.120 – 10.0.83.120	10.0.83.120
122	10.0.83.121/32	10.0.83.121 – 10.0.83.121	10.0.83.121
123	10.0.83.122/32	10.0.83.122 – 10.0.83.122	10.0.83.122
124	10.0.83.123/32	10.0.83.123 – 10.0.83.123	10.0.83.123
125	10.0.83.124/32	10.0.83.124 – 10.0.83.124	10.0.83.124
126	10.0.83.125/32	10.0.83.125 – 10.0.83.125	10.0.83.125
127	10.0.83.126/32	10.0.83.126 – 10.0.83.126	10.0.83.126
128	10.0.83.127/32	10.0.83.127 – 10.0.83.127	10.0.83.127
129	10.0.83.128/32	10.0.83.128 – 10.0.83.128	10.0.83.128
130	10.0.83.129/32	10.0.83.129 – 10.0.83.129	10.0.83.129
131	10.0.83.130/32	10.0.83.130 – 10.0.83.130	10.0.83.130
132	10.0.83.131/32	10.0.83.131 – 10.0.83.131	10.0.83.131
133	10.0.83.132/32	10.0.83.132 – 10.0.83.132	10.0.83.132
134	10.0.83.133/32	10.0.83.133 – 10.0.83.133	10.0.83.133
135	10.0.83.134/32	10.0.83.134 – 10.0.83.134	10.0.83.134
136	10.0.83.135/32	10.0.83.135 – 10.0.83.135	10.0.83.135
137	10.0.83.136/32	10.0.83.136 – 10.0.83.136	10.0.83.136
138	10.0.83.137/32	10.0.83.137 – 10.0.83.137	10.0.83.137
139	10.0.83.138/32	10.0.83.138 – 10.0.83.138	10.0.83.138
140	10.0.83.139/32	10.0.83.139 – 10.0.83.139	10.0.83.139
141	10.0.83.140/32	10.0.83.140 – 10.0.83.140	10.0.83.140
142	10.0.83.141/32	10.0.83.141 – 10.0.83.141	10.0.83.141
143	10.0.83.142/32	10.0.83.142 – 10.0.83.142	10.0.83.142
144	10.0.83.143/32	10.0.83.143 – 10.0.83.143	10.0.83.143
145	10.0.83.144/32	10.0.83.144 – 10.0.83.144	10.0.83.144
146	10.0.83.145/32	10.0.83.145 – 10.0.83.145	10.0.83.145
147	10.0.83.146/32	10.0.83.146 – 10.0.83.146	10.0.83.146
148	10.0.83.147/32	10.0.83.147 – 10.0.83.147	10.0.83.147
149	10.0.83.148/32	10.0.83.148 – 10.0.83.148	10.0.83.148
150	10.0.83.149/32	10.0.83.149 – 10.0.83.149	10.0.83.149
151	10.0.83.150/32	10.0.83.150 – 10.0.83.150	10.0.83.150
152	10.0.83.151/32	10.0.83.151 – 10.0.83.151	10.0.83.151
153	10.0.83.152/32	10.0.83.152 – 10.0.83.152	10.0.83.152
154	10.0.83.153/32	10.0.83.153 – 10.0.83.153	10.0.83.153
155	10.0.83.154/32	10.0.83.154 – 10.0.83.154	10.0.83.154
156	10.0.83.155/32	10.0.83.155 – 10.0.83.155	10.0.83.155
157	10.0.83.156/32	10.0.83.156 – 10.0.83.156	10.0.83.156
158	10.0.83.157/32	10.0.83.157 – 10.0.83.157	10.0.83.157
159	10.0.83.158/32	10.0.83.158 – 10.0.83.158	10.0.83.158
160	10.0.83.159/32	10.0.83.159 – 10.0.83.159	10.0.83.159
161	10.0.83.160/32	10.0.83.160 – 10.0.83.160	10.0.83.160
162	10.0.83.161/32	10.0.83.161 – 10.0.83.161	10.0.83.161
163	10.0.83.162/32	10.0.83.162 – 10.0.83.162	10.0.83.162
164	10.0.83.163/32	10.0.83.163 – 10.0.83.163	10.0.83.163
165	10.0.83.164/32	10.0.83.164 – 10.0.83.164	10.0.83.164
166	10.0.83.165/32	10.0.83.165 – 10.0.83.165	10.0.83.165
167	10.0.83.166/32	10.0.83.166 – 10.0.83.166	10.0.83.166
168	10.0.83.167/32	10.0.83.167 – 10.0.83.167	10.0.83.167
169	10.0.83.168/32	10.0.83.168 – 10.0.83.168	10.0.83.168
170	10.0.83.169/32	10.0.83.169 – 10.0.83.169	10.0.83.169
171	10.0.83.170/32	10.0.83.170 – 10.0.83.170	10.0.83.170
172	10.0.83.171/32	10.0.83.171 – 10.0.83.171	10.0.83.171
173	10.0.83.172/32	10.0.83.172 – 10.0.83.172	10.0.83.172
174	10.0.83.173/32	10.0.83.173 – 10.0.83.173	10.0.83.173
175	10.0.83.174/32	10.0.83.174 – 10.0.83.174	10.0.83.174
176	10.0.83.175/32	10.0.83.175 – 10.0.83.175	10.0.83.175
177	10.0.83.176/32	10.0.83.176 – 10.0.83.176	10.0.83.176
178	10.0.83.177/32	10.0.83.177 – 10.0.83.177	10.0.83.177
179	10.0.83.178/32	10.0.83.178 – 10.0.83.178	10.0.83.178
180	10.0.83.179/32	10.0.83.179 – 10.0.83.179	10.0.83.179
181	10.0.83.180/32	10.0.83.180 – 10.0.83.180	10.0.83.180
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183	10.0.83.182/32	10.0.83.182 – 10.0.83.182	10.0.83.182
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190	10.0.83.189/32	10.0.83.189 – 10.0.83.189	10.0.83.189
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198	10.0.83.197/32	10.0.83.197 – 10.0.83.197	10.0.83.197
199	10.0.83.198/32	10.0.83.198 – 10.0.83.198	10.0.83.198
200	10.0.83.199/32	10.0.83.199 – 10.0.83.199	10.0.83.199
201	10.0.83.200/32	10.0.83.200 – 10.0.83.200	10.0.83.200
202	10.0.83.201/32	10.0.83.201 – 10.0.83.201	10.0.83.201
203	10.0.83.202/32	10.0.83.202 – 10.0.83.202	10.0.83.202
204	10.0.83.203/32	10.0.83.203 – 10.0.83.203	10.0.83.203
205	10.0.83.204/32	10.0.83.204 – 10.0.83.204	10.0.83.204
206	10.0.83.205/32	10.0.83.205 – 10.0.83.205	10.0.83.205
207	10.0.83.206/32	10.0.83.206 – 10.0.83.206	10.0.83.206
208	10.0.83.207/32	10.0.83.207 – 10.0.83.207	10.0.83.207
209	10.0.83.208/32	10.0.83.208 – 10.0.83.208	10.0.83.208
210	10.0.83.209/32	10.0.83.209 – 10.0.83.209	10.0.83.209
211	10.0.83.210/32	10.0.83.210 – 10.0.83.210	10.0.83.210
212	10.0.83.211/32	10.0.83.211 – 10.0.83.211	10.0.83.211
213	10.0.83.212/32	10.0.83.212 – 10.0.83.212	10.0.83.212
214	10.0.83.213/32	10.0.83.213 – 10.0.83.213	10.0.83.213
215	10.0.83.214/32	10.0.83.214 – 10.0.83.214	10.0.83.214
216	10.0.83.215/32	10.0.83.215 – 10.0.83.215	10.0.83.215
217	10.0.83.216/32	10.0.83.216 – 10.0.83.216	10.0.83.216
218	10.0.83.217/32	10.0.83.217 – 10.0.83.217	10.0.83.217
219	10.0.83.218/32	10.0.83.218 – 10.0.83.218	10.0.83.218
220	10.0.83.219/32	10.0.83.219 – 10.0.83.219	10.0.83.219
221	10.0.83.220/32	10.0.83.220 – 10.0.83.220	10.0.83.220
222	10.0.83.221/32	10.0.83.221 – 10.0.83.221	10.0.83.221
223	10.0.83.222/32	10.0.83.222 – 10.0.83.222	10.0.83.222
224	10.0.83.223/32	10.0.83.223 – 10.0.83.223	10.0.83.223
225	10.0.83.224/32	10.0.83.224 – 10.0.83.224	10.0.83.224
226	10.0.83.225/32	10.0.83.225 – 10.0.83.225	10.0.83.225
227	10.0.83.226/32	10.0.83.226 – 10.0.83.226	10.0.83.226
228	10.0.83.227/32	10.0.83.227 – 10.0.83.227	10.0.83.227
229	10.0.83.228/32	10.0.83.228 – 10.0.83.228	10.0.83.228
230	10.0.83.229/32	10.0.83.229 – 10.0.83.229	10.0.83.229
231	10.0.83.230/32	10.0.83.230 – 10.0.83.230	10.0.83.230
232	10.0.83.231/32	10.0.83.231 – 10.0.83.231	10.0.83.231
233	10.0.83.232/32	10.0.83.232 – 10.0.83.232	10.0.83.232
234	10.0.83.233/32	10.0.83.233 – 10.0.83.233	10.0.83.233
235	10.0.83.234/32	10.0.83.234 – 10.0.83.234	10.0.83.234
236	10.0.83.235/32	10.0.83.235 – 10.0.83.235	10.0.83.235
237	10.0.83.236/32	10.0.83.236 – 10.0.83.236	10.0.83.236
238	10.0.83.237/32	10.0.83.237 – 10.0.83.237	10.0.83.237
239	10.0.83.238/32	10.0.83.238 – 10.0.83.238	10.0.83.238
240	10.0.83.239/32	10.0.83.239 – 10.0.83.239	10.0.83.239
241	10.0.83.240/32	10.0.83.240 – 10.0.83.240	10.0.83.240
242	10.0.83.241/32	10.0.83.241 – 10.0.83.241	10.0.83.241
243	10.0.83.242/32	10.0.83.242 – 10.0.83.242	10.0.83.242
244	10.0.83.243/32	10.0.83.243 – 10.0.83.243	10.0.83.243
245	10.0.83.244/32	10.0.83.244 – 10.0.83.244	10.0.83.244
246	10.0.83.245/32	10.0.83.245 – 10.0.83.245	10.0.83.245
247	10.0.83.246/32	10.0.83.246 – 10.0.83.246	10.0.83.246
248	10.0.83.247/32	10.0.83.247 – 10.0.83.247	10.0.83.247
249	10.0.83.248/32	10.0.83.248 – 10.0.83.248	10.0.83.248
250	10.0.83.249/32	10.0.83.249 – 10.0.83.249	10.0.83.249
251	10.0.83.250/32	10.0.83.250 – 10.0.83.250	10.0.83.250
252	10.0.83.251/32	10.0.83.251 – 10.0.83.251	10.0.83.251
253	10.0.83.252/32	10.0.83.252 – 10.0.83.252	10.0.83.252
254	10.0.83.253/32	10.0.83.253 – 10.0.83.253	10.0.83.253
255	10.0.83.254/32	10.0.83.254 – 10.0.83.254	10.0.83.254
256	10.0.83.255/32	10.0.83.255 – 10.0.83.255	10.0.83.255

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 →