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)10.40.182.0/24

network10.40.182.0/24

broadcast10.40.182.255

first host10.40.182.1

last host10.40.182.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.40.182.0/24

address00001010.00101000.10110110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00101000.10110110.00000000

broadcast00001010.00101000.10110110.11111111

green = network part, grey = host part

hex0x0a28b600

decimal170440192

reverse dns0.182.40.10.in-addr.arpa

ipv4-mapped::ffff:a28:b600

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.40.182.0/32	10.40.182.0 – 10.40.182.0	10.40.182.0
2	10.40.182.1/32	10.40.182.1 – 10.40.182.1	10.40.182.1
3	10.40.182.2/32	10.40.182.2 – 10.40.182.2	10.40.182.2
4	10.40.182.3/32	10.40.182.3 – 10.40.182.3	10.40.182.3
5	10.40.182.4/32	10.40.182.4 – 10.40.182.4	10.40.182.4
6	10.40.182.5/32	10.40.182.5 – 10.40.182.5	10.40.182.5
7	10.40.182.6/32	10.40.182.6 – 10.40.182.6	10.40.182.6
8	10.40.182.7/32	10.40.182.7 – 10.40.182.7	10.40.182.7
9	10.40.182.8/32	10.40.182.8 – 10.40.182.8	10.40.182.8
10	10.40.182.9/32	10.40.182.9 – 10.40.182.9	10.40.182.9
11	10.40.182.10/32	10.40.182.10 – 10.40.182.10	10.40.182.10
12	10.40.182.11/32	10.40.182.11 – 10.40.182.11	10.40.182.11
13	10.40.182.12/32	10.40.182.12 – 10.40.182.12	10.40.182.12
14	10.40.182.13/32	10.40.182.13 – 10.40.182.13	10.40.182.13
15	10.40.182.14/32	10.40.182.14 – 10.40.182.14	10.40.182.14
16	10.40.182.15/32	10.40.182.15 – 10.40.182.15	10.40.182.15
17	10.40.182.16/32	10.40.182.16 – 10.40.182.16	10.40.182.16
18	10.40.182.17/32	10.40.182.17 – 10.40.182.17	10.40.182.17
19	10.40.182.18/32	10.40.182.18 – 10.40.182.18	10.40.182.18
20	10.40.182.19/32	10.40.182.19 – 10.40.182.19	10.40.182.19
21	10.40.182.20/32	10.40.182.20 – 10.40.182.20	10.40.182.20
22	10.40.182.21/32	10.40.182.21 – 10.40.182.21	10.40.182.21
23	10.40.182.22/32	10.40.182.22 – 10.40.182.22	10.40.182.22
24	10.40.182.23/32	10.40.182.23 – 10.40.182.23	10.40.182.23
25	10.40.182.24/32	10.40.182.24 – 10.40.182.24	10.40.182.24
26	10.40.182.25/32	10.40.182.25 – 10.40.182.25	10.40.182.25
27	10.40.182.26/32	10.40.182.26 – 10.40.182.26	10.40.182.26
28	10.40.182.27/32	10.40.182.27 – 10.40.182.27	10.40.182.27
29	10.40.182.28/32	10.40.182.28 – 10.40.182.28	10.40.182.28
30	10.40.182.29/32	10.40.182.29 – 10.40.182.29	10.40.182.29
31	10.40.182.30/32	10.40.182.30 – 10.40.182.30	10.40.182.30
32	10.40.182.31/32	10.40.182.31 – 10.40.182.31	10.40.182.31
33	10.40.182.32/32	10.40.182.32 – 10.40.182.32	10.40.182.32
34	10.40.182.33/32	10.40.182.33 – 10.40.182.33	10.40.182.33
35	10.40.182.34/32	10.40.182.34 – 10.40.182.34	10.40.182.34
36	10.40.182.35/32	10.40.182.35 – 10.40.182.35	10.40.182.35
37	10.40.182.36/32	10.40.182.36 – 10.40.182.36	10.40.182.36
38	10.40.182.37/32	10.40.182.37 – 10.40.182.37	10.40.182.37
39	10.40.182.38/32	10.40.182.38 – 10.40.182.38	10.40.182.38
40	10.40.182.39/32	10.40.182.39 – 10.40.182.39	10.40.182.39
41	10.40.182.40/32	10.40.182.40 – 10.40.182.40	10.40.182.40
42	10.40.182.41/32	10.40.182.41 – 10.40.182.41	10.40.182.41
43	10.40.182.42/32	10.40.182.42 – 10.40.182.42	10.40.182.42
44	10.40.182.43/32	10.40.182.43 – 10.40.182.43	10.40.182.43
45	10.40.182.44/32	10.40.182.44 – 10.40.182.44	10.40.182.44
46	10.40.182.45/32	10.40.182.45 – 10.40.182.45	10.40.182.45
47	10.40.182.46/32	10.40.182.46 – 10.40.182.46	10.40.182.46
48	10.40.182.47/32	10.40.182.47 – 10.40.182.47	10.40.182.47
49	10.40.182.48/32	10.40.182.48 – 10.40.182.48	10.40.182.48
50	10.40.182.49/32	10.40.182.49 – 10.40.182.49	10.40.182.49
51	10.40.182.50/32	10.40.182.50 – 10.40.182.50	10.40.182.50
52	10.40.182.51/32	10.40.182.51 – 10.40.182.51	10.40.182.51
53	10.40.182.52/32	10.40.182.52 – 10.40.182.52	10.40.182.52
54	10.40.182.53/32	10.40.182.53 – 10.40.182.53	10.40.182.53
55	10.40.182.54/32	10.40.182.54 – 10.40.182.54	10.40.182.54
56	10.40.182.55/32	10.40.182.55 – 10.40.182.55	10.40.182.55
57	10.40.182.56/32	10.40.182.56 – 10.40.182.56	10.40.182.56
58	10.40.182.57/32	10.40.182.57 – 10.40.182.57	10.40.182.57
59	10.40.182.58/32	10.40.182.58 – 10.40.182.58	10.40.182.58
60	10.40.182.59/32	10.40.182.59 – 10.40.182.59	10.40.182.59
61	10.40.182.60/32	10.40.182.60 – 10.40.182.60	10.40.182.60
62	10.40.182.61/32	10.40.182.61 – 10.40.182.61	10.40.182.61
63	10.40.182.62/32	10.40.182.62 – 10.40.182.62	10.40.182.62
64	10.40.182.63/32	10.40.182.63 – 10.40.182.63	10.40.182.63
65	10.40.182.64/32	10.40.182.64 – 10.40.182.64	10.40.182.64
66	10.40.182.65/32	10.40.182.65 – 10.40.182.65	10.40.182.65
67	10.40.182.66/32	10.40.182.66 – 10.40.182.66	10.40.182.66
68	10.40.182.67/32	10.40.182.67 – 10.40.182.67	10.40.182.67
69	10.40.182.68/32	10.40.182.68 – 10.40.182.68	10.40.182.68
70	10.40.182.69/32	10.40.182.69 – 10.40.182.69	10.40.182.69
71	10.40.182.70/32	10.40.182.70 – 10.40.182.70	10.40.182.70
72	10.40.182.71/32	10.40.182.71 – 10.40.182.71	10.40.182.71
73	10.40.182.72/32	10.40.182.72 – 10.40.182.72	10.40.182.72
74	10.40.182.73/32	10.40.182.73 – 10.40.182.73	10.40.182.73
75	10.40.182.74/32	10.40.182.74 – 10.40.182.74	10.40.182.74
76	10.40.182.75/32	10.40.182.75 – 10.40.182.75	10.40.182.75
77	10.40.182.76/32	10.40.182.76 – 10.40.182.76	10.40.182.76
78	10.40.182.77/32	10.40.182.77 – 10.40.182.77	10.40.182.77
79	10.40.182.78/32	10.40.182.78 – 10.40.182.78	10.40.182.78
80	10.40.182.79/32	10.40.182.79 – 10.40.182.79	10.40.182.79
81	10.40.182.80/32	10.40.182.80 – 10.40.182.80	10.40.182.80
82	10.40.182.81/32	10.40.182.81 – 10.40.182.81	10.40.182.81
83	10.40.182.82/32	10.40.182.82 – 10.40.182.82	10.40.182.82
84	10.40.182.83/32	10.40.182.83 – 10.40.182.83	10.40.182.83
85	10.40.182.84/32	10.40.182.84 – 10.40.182.84	10.40.182.84
86	10.40.182.85/32	10.40.182.85 – 10.40.182.85	10.40.182.85
87	10.40.182.86/32	10.40.182.86 – 10.40.182.86	10.40.182.86
88	10.40.182.87/32	10.40.182.87 – 10.40.182.87	10.40.182.87
89	10.40.182.88/32	10.40.182.88 – 10.40.182.88	10.40.182.88
90	10.40.182.89/32	10.40.182.89 – 10.40.182.89	10.40.182.89
91	10.40.182.90/32	10.40.182.90 – 10.40.182.90	10.40.182.90
92	10.40.182.91/32	10.40.182.91 – 10.40.182.91	10.40.182.91
93	10.40.182.92/32	10.40.182.92 – 10.40.182.92	10.40.182.92
94	10.40.182.93/32	10.40.182.93 – 10.40.182.93	10.40.182.93
95	10.40.182.94/32	10.40.182.94 – 10.40.182.94	10.40.182.94
96	10.40.182.95/32	10.40.182.95 – 10.40.182.95	10.40.182.95
97	10.40.182.96/32	10.40.182.96 – 10.40.182.96	10.40.182.96
98	10.40.182.97/32	10.40.182.97 – 10.40.182.97	10.40.182.97
99	10.40.182.98/32	10.40.182.98 – 10.40.182.98	10.40.182.98
100	10.40.182.99/32	10.40.182.99 – 10.40.182.99	10.40.182.99
101	10.40.182.100/32	10.40.182.100 – 10.40.182.100	10.40.182.100
102	10.40.182.101/32	10.40.182.101 – 10.40.182.101	10.40.182.101
103	10.40.182.102/32	10.40.182.102 – 10.40.182.102	10.40.182.102
104	10.40.182.103/32	10.40.182.103 – 10.40.182.103	10.40.182.103
105	10.40.182.104/32	10.40.182.104 – 10.40.182.104	10.40.182.104
106	10.40.182.105/32	10.40.182.105 – 10.40.182.105	10.40.182.105
107	10.40.182.106/32	10.40.182.106 – 10.40.182.106	10.40.182.106
108	10.40.182.107/32	10.40.182.107 – 10.40.182.107	10.40.182.107
109	10.40.182.108/32	10.40.182.108 – 10.40.182.108	10.40.182.108
110	10.40.182.109/32	10.40.182.109 – 10.40.182.109	10.40.182.109
111	10.40.182.110/32	10.40.182.110 – 10.40.182.110	10.40.182.110
112	10.40.182.111/32	10.40.182.111 – 10.40.182.111	10.40.182.111
113	10.40.182.112/32	10.40.182.112 – 10.40.182.112	10.40.182.112
114	10.40.182.113/32	10.40.182.113 – 10.40.182.113	10.40.182.113
115	10.40.182.114/32	10.40.182.114 – 10.40.182.114	10.40.182.114
116	10.40.182.115/32	10.40.182.115 – 10.40.182.115	10.40.182.115
117	10.40.182.116/32	10.40.182.116 – 10.40.182.116	10.40.182.116
118	10.40.182.117/32	10.40.182.117 – 10.40.182.117	10.40.182.117
119	10.40.182.118/32	10.40.182.118 – 10.40.182.118	10.40.182.118
120	10.40.182.119/32	10.40.182.119 – 10.40.182.119	10.40.182.119
121	10.40.182.120/32	10.40.182.120 – 10.40.182.120	10.40.182.120
122	10.40.182.121/32	10.40.182.121 – 10.40.182.121	10.40.182.121
123	10.40.182.122/32	10.40.182.122 – 10.40.182.122	10.40.182.122
124	10.40.182.123/32	10.40.182.123 – 10.40.182.123	10.40.182.123
125	10.40.182.124/32	10.40.182.124 – 10.40.182.124	10.40.182.124
126	10.40.182.125/32	10.40.182.125 – 10.40.182.125	10.40.182.125
127	10.40.182.126/32	10.40.182.126 – 10.40.182.126	10.40.182.126
128	10.40.182.127/32	10.40.182.127 – 10.40.182.127	10.40.182.127
129	10.40.182.128/32	10.40.182.128 – 10.40.182.128	10.40.182.128
130	10.40.182.129/32	10.40.182.129 – 10.40.182.129	10.40.182.129
131	10.40.182.130/32	10.40.182.130 – 10.40.182.130	10.40.182.130
132	10.40.182.131/32	10.40.182.131 – 10.40.182.131	10.40.182.131
133	10.40.182.132/32	10.40.182.132 – 10.40.182.132	10.40.182.132
134	10.40.182.133/32	10.40.182.133 – 10.40.182.133	10.40.182.133
135	10.40.182.134/32	10.40.182.134 – 10.40.182.134	10.40.182.134
136	10.40.182.135/32	10.40.182.135 – 10.40.182.135	10.40.182.135
137	10.40.182.136/32	10.40.182.136 – 10.40.182.136	10.40.182.136
138	10.40.182.137/32	10.40.182.137 – 10.40.182.137	10.40.182.137
139	10.40.182.138/32	10.40.182.138 – 10.40.182.138	10.40.182.138
140	10.40.182.139/32	10.40.182.139 – 10.40.182.139	10.40.182.139
141	10.40.182.140/32	10.40.182.140 – 10.40.182.140	10.40.182.140
142	10.40.182.141/32	10.40.182.141 – 10.40.182.141	10.40.182.141
143	10.40.182.142/32	10.40.182.142 – 10.40.182.142	10.40.182.142
144	10.40.182.143/32	10.40.182.143 – 10.40.182.143	10.40.182.143
145	10.40.182.144/32	10.40.182.144 – 10.40.182.144	10.40.182.144
146	10.40.182.145/32	10.40.182.145 – 10.40.182.145	10.40.182.145
147	10.40.182.146/32	10.40.182.146 – 10.40.182.146	10.40.182.146
148	10.40.182.147/32	10.40.182.147 – 10.40.182.147	10.40.182.147
149	10.40.182.148/32	10.40.182.148 – 10.40.182.148	10.40.182.148
150	10.40.182.149/32	10.40.182.149 – 10.40.182.149	10.40.182.149
151	10.40.182.150/32	10.40.182.150 – 10.40.182.150	10.40.182.150
152	10.40.182.151/32	10.40.182.151 – 10.40.182.151	10.40.182.151
153	10.40.182.152/32	10.40.182.152 – 10.40.182.152	10.40.182.152
154	10.40.182.153/32	10.40.182.153 – 10.40.182.153	10.40.182.153
155	10.40.182.154/32	10.40.182.154 – 10.40.182.154	10.40.182.154
156	10.40.182.155/32	10.40.182.155 – 10.40.182.155	10.40.182.155
157	10.40.182.156/32	10.40.182.156 – 10.40.182.156	10.40.182.156
158	10.40.182.157/32	10.40.182.157 – 10.40.182.157	10.40.182.157
159	10.40.182.158/32	10.40.182.158 – 10.40.182.158	10.40.182.158
160	10.40.182.159/32	10.40.182.159 – 10.40.182.159	10.40.182.159
161	10.40.182.160/32	10.40.182.160 – 10.40.182.160	10.40.182.160
162	10.40.182.161/32	10.40.182.161 – 10.40.182.161	10.40.182.161
163	10.40.182.162/32	10.40.182.162 – 10.40.182.162	10.40.182.162
164	10.40.182.163/32	10.40.182.163 – 10.40.182.163	10.40.182.163
165	10.40.182.164/32	10.40.182.164 – 10.40.182.164	10.40.182.164
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167	10.40.182.166/32	10.40.182.166 – 10.40.182.166	10.40.182.166
168	10.40.182.167/32	10.40.182.167 – 10.40.182.167	10.40.182.167
169	10.40.182.168/32	10.40.182.168 – 10.40.182.168	10.40.182.168
170	10.40.182.169/32	10.40.182.169 – 10.40.182.169	10.40.182.169
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210	10.40.182.209/32	10.40.182.209 – 10.40.182.209	10.40.182.209
211	10.40.182.210/32	10.40.182.210 – 10.40.182.210	10.40.182.210
212	10.40.182.211/32	10.40.182.211 – 10.40.182.211	10.40.182.211
213	10.40.182.212/32	10.40.182.212 – 10.40.182.212	10.40.182.212
214	10.40.182.213/32	10.40.182.213 – 10.40.182.213	10.40.182.213
215	10.40.182.214/32	10.40.182.214 – 10.40.182.214	10.40.182.214
216	10.40.182.215/32	10.40.182.215 – 10.40.182.215	10.40.182.215
217	10.40.182.216/32	10.40.182.216 – 10.40.182.216	10.40.182.216
218	10.40.182.217/32	10.40.182.217 – 10.40.182.217	10.40.182.217
219	10.40.182.218/32	10.40.182.218 – 10.40.182.218	10.40.182.218
220	10.40.182.219/32	10.40.182.219 – 10.40.182.219	10.40.182.219
221	10.40.182.220/32	10.40.182.220 – 10.40.182.220	10.40.182.220
222	10.40.182.221/32	10.40.182.221 – 10.40.182.221	10.40.182.221
223	10.40.182.222/32	10.40.182.222 – 10.40.182.222	10.40.182.222
224	10.40.182.223/32	10.40.182.223 – 10.40.182.223	10.40.182.223
225	10.40.182.224/32	10.40.182.224 – 10.40.182.224	10.40.182.224
226	10.40.182.225/32	10.40.182.225 – 10.40.182.225	10.40.182.225
227	10.40.182.226/32	10.40.182.226 – 10.40.182.226	10.40.182.226
228	10.40.182.227/32	10.40.182.227 – 10.40.182.227	10.40.182.227
229	10.40.182.228/32	10.40.182.228 – 10.40.182.228	10.40.182.228
230	10.40.182.229/32	10.40.182.229 – 10.40.182.229	10.40.182.229
231	10.40.182.230/32	10.40.182.230 – 10.40.182.230	10.40.182.230
232	10.40.182.231/32	10.40.182.231 – 10.40.182.231	10.40.182.231
233	10.40.182.232/32	10.40.182.232 – 10.40.182.232	10.40.182.232
234	10.40.182.233/32	10.40.182.233 – 10.40.182.233	10.40.182.233
235	10.40.182.234/32	10.40.182.234 – 10.40.182.234	10.40.182.234
236	10.40.182.235/32	10.40.182.235 – 10.40.182.235	10.40.182.235
237	10.40.182.236/32	10.40.182.236 – 10.40.182.236	10.40.182.236
238	10.40.182.237/32	10.40.182.237 – 10.40.182.237	10.40.182.237
239	10.40.182.238/32	10.40.182.238 – 10.40.182.238	10.40.182.238
240	10.40.182.239/32	10.40.182.239 – 10.40.182.239	10.40.182.239
241	10.40.182.240/32	10.40.182.240 – 10.40.182.240	10.40.182.240
242	10.40.182.241/32	10.40.182.241 – 10.40.182.241	10.40.182.241
243	10.40.182.242/32	10.40.182.242 – 10.40.182.242	10.40.182.242
244	10.40.182.243/32	10.40.182.243 – 10.40.182.243	10.40.182.243
245	10.40.182.244/32	10.40.182.244 – 10.40.182.244	10.40.182.244
246	10.40.182.245/32	10.40.182.245 – 10.40.182.245	10.40.182.245
247	10.40.182.246/32	10.40.182.246 – 10.40.182.246	10.40.182.246
248	10.40.182.247/32	10.40.182.247 – 10.40.182.247	10.40.182.247
249	10.40.182.248/32	10.40.182.248 – 10.40.182.248	10.40.182.248
250	10.40.182.249/32	10.40.182.249 – 10.40.182.249	10.40.182.249
251	10.40.182.250/32	10.40.182.250 – 10.40.182.250	10.40.182.250
252	10.40.182.251/32	10.40.182.251 – 10.40.182.251	10.40.182.251
253	10.40.182.252/32	10.40.182.252 – 10.40.182.252	10.40.182.252
254	10.40.182.253/32	10.40.182.253 – 10.40.182.253	10.40.182.253
255	10.40.182.254/32	10.40.182.254 – 10.40.182.254	10.40.182.254
256	10.40.182.255/32	10.40.182.255 – 10.40.182.255	10.40.182.255

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 →