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)10.2.206.0/24

network10.2.206.0/24

broadcast10.2.206.255

first host10.2.206.1

last host10.2.206.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.206.0/24

address00001010.00000010.11001110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.11001110.00000000

broadcast00001010.00000010.11001110.11111111

green = network part, grey = host part

hex0x0a02ce00

decimal167955968

reverse dns0.206.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:ce00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.206.0/32	10.2.206.0 – 10.2.206.0	10.2.206.0
2	10.2.206.1/32	10.2.206.1 – 10.2.206.1	10.2.206.1
3	10.2.206.2/32	10.2.206.2 – 10.2.206.2	10.2.206.2
4	10.2.206.3/32	10.2.206.3 – 10.2.206.3	10.2.206.3
5	10.2.206.4/32	10.2.206.4 – 10.2.206.4	10.2.206.4
6	10.2.206.5/32	10.2.206.5 – 10.2.206.5	10.2.206.5
7	10.2.206.6/32	10.2.206.6 – 10.2.206.6	10.2.206.6
8	10.2.206.7/32	10.2.206.7 – 10.2.206.7	10.2.206.7
9	10.2.206.8/32	10.2.206.8 – 10.2.206.8	10.2.206.8
10	10.2.206.9/32	10.2.206.9 – 10.2.206.9	10.2.206.9
11	10.2.206.10/32	10.2.206.10 – 10.2.206.10	10.2.206.10
12	10.2.206.11/32	10.2.206.11 – 10.2.206.11	10.2.206.11
13	10.2.206.12/32	10.2.206.12 – 10.2.206.12	10.2.206.12
14	10.2.206.13/32	10.2.206.13 – 10.2.206.13	10.2.206.13
15	10.2.206.14/32	10.2.206.14 – 10.2.206.14	10.2.206.14
16	10.2.206.15/32	10.2.206.15 – 10.2.206.15	10.2.206.15
17	10.2.206.16/32	10.2.206.16 – 10.2.206.16	10.2.206.16
18	10.2.206.17/32	10.2.206.17 – 10.2.206.17	10.2.206.17
19	10.2.206.18/32	10.2.206.18 – 10.2.206.18	10.2.206.18
20	10.2.206.19/32	10.2.206.19 – 10.2.206.19	10.2.206.19
21	10.2.206.20/32	10.2.206.20 – 10.2.206.20	10.2.206.20
22	10.2.206.21/32	10.2.206.21 – 10.2.206.21	10.2.206.21
23	10.2.206.22/32	10.2.206.22 – 10.2.206.22	10.2.206.22
24	10.2.206.23/32	10.2.206.23 – 10.2.206.23	10.2.206.23
25	10.2.206.24/32	10.2.206.24 – 10.2.206.24	10.2.206.24
26	10.2.206.25/32	10.2.206.25 – 10.2.206.25	10.2.206.25
27	10.2.206.26/32	10.2.206.26 – 10.2.206.26	10.2.206.26
28	10.2.206.27/32	10.2.206.27 – 10.2.206.27	10.2.206.27
29	10.2.206.28/32	10.2.206.28 – 10.2.206.28	10.2.206.28
30	10.2.206.29/32	10.2.206.29 – 10.2.206.29	10.2.206.29
31	10.2.206.30/32	10.2.206.30 – 10.2.206.30	10.2.206.30
32	10.2.206.31/32	10.2.206.31 – 10.2.206.31	10.2.206.31
33	10.2.206.32/32	10.2.206.32 – 10.2.206.32	10.2.206.32
34	10.2.206.33/32	10.2.206.33 – 10.2.206.33	10.2.206.33
35	10.2.206.34/32	10.2.206.34 – 10.2.206.34	10.2.206.34
36	10.2.206.35/32	10.2.206.35 – 10.2.206.35	10.2.206.35
37	10.2.206.36/32	10.2.206.36 – 10.2.206.36	10.2.206.36
38	10.2.206.37/32	10.2.206.37 – 10.2.206.37	10.2.206.37
39	10.2.206.38/32	10.2.206.38 – 10.2.206.38	10.2.206.38
40	10.2.206.39/32	10.2.206.39 – 10.2.206.39	10.2.206.39
41	10.2.206.40/32	10.2.206.40 – 10.2.206.40	10.2.206.40
42	10.2.206.41/32	10.2.206.41 – 10.2.206.41	10.2.206.41
43	10.2.206.42/32	10.2.206.42 – 10.2.206.42	10.2.206.42
44	10.2.206.43/32	10.2.206.43 – 10.2.206.43	10.2.206.43
45	10.2.206.44/32	10.2.206.44 – 10.2.206.44	10.2.206.44
46	10.2.206.45/32	10.2.206.45 – 10.2.206.45	10.2.206.45
47	10.2.206.46/32	10.2.206.46 – 10.2.206.46	10.2.206.46
48	10.2.206.47/32	10.2.206.47 – 10.2.206.47	10.2.206.47
49	10.2.206.48/32	10.2.206.48 – 10.2.206.48	10.2.206.48
50	10.2.206.49/32	10.2.206.49 – 10.2.206.49	10.2.206.49
51	10.2.206.50/32	10.2.206.50 – 10.2.206.50	10.2.206.50
52	10.2.206.51/32	10.2.206.51 – 10.2.206.51	10.2.206.51
53	10.2.206.52/32	10.2.206.52 – 10.2.206.52	10.2.206.52
54	10.2.206.53/32	10.2.206.53 – 10.2.206.53	10.2.206.53
55	10.2.206.54/32	10.2.206.54 – 10.2.206.54	10.2.206.54
56	10.2.206.55/32	10.2.206.55 – 10.2.206.55	10.2.206.55
57	10.2.206.56/32	10.2.206.56 – 10.2.206.56	10.2.206.56
58	10.2.206.57/32	10.2.206.57 – 10.2.206.57	10.2.206.57
59	10.2.206.58/32	10.2.206.58 – 10.2.206.58	10.2.206.58
60	10.2.206.59/32	10.2.206.59 – 10.2.206.59	10.2.206.59
61	10.2.206.60/32	10.2.206.60 – 10.2.206.60	10.2.206.60
62	10.2.206.61/32	10.2.206.61 – 10.2.206.61	10.2.206.61
63	10.2.206.62/32	10.2.206.62 – 10.2.206.62	10.2.206.62
64	10.2.206.63/32	10.2.206.63 – 10.2.206.63	10.2.206.63
65	10.2.206.64/32	10.2.206.64 – 10.2.206.64	10.2.206.64
66	10.2.206.65/32	10.2.206.65 – 10.2.206.65	10.2.206.65
67	10.2.206.66/32	10.2.206.66 – 10.2.206.66	10.2.206.66
68	10.2.206.67/32	10.2.206.67 – 10.2.206.67	10.2.206.67
69	10.2.206.68/32	10.2.206.68 – 10.2.206.68	10.2.206.68
70	10.2.206.69/32	10.2.206.69 – 10.2.206.69	10.2.206.69
71	10.2.206.70/32	10.2.206.70 – 10.2.206.70	10.2.206.70
72	10.2.206.71/32	10.2.206.71 – 10.2.206.71	10.2.206.71
73	10.2.206.72/32	10.2.206.72 – 10.2.206.72	10.2.206.72
74	10.2.206.73/32	10.2.206.73 – 10.2.206.73	10.2.206.73
75	10.2.206.74/32	10.2.206.74 – 10.2.206.74	10.2.206.74
76	10.2.206.75/32	10.2.206.75 – 10.2.206.75	10.2.206.75
77	10.2.206.76/32	10.2.206.76 – 10.2.206.76	10.2.206.76
78	10.2.206.77/32	10.2.206.77 – 10.2.206.77	10.2.206.77
79	10.2.206.78/32	10.2.206.78 – 10.2.206.78	10.2.206.78
80	10.2.206.79/32	10.2.206.79 – 10.2.206.79	10.2.206.79
81	10.2.206.80/32	10.2.206.80 – 10.2.206.80	10.2.206.80
82	10.2.206.81/32	10.2.206.81 – 10.2.206.81	10.2.206.81
83	10.2.206.82/32	10.2.206.82 – 10.2.206.82	10.2.206.82
84	10.2.206.83/32	10.2.206.83 – 10.2.206.83	10.2.206.83
85	10.2.206.84/32	10.2.206.84 – 10.2.206.84	10.2.206.84
86	10.2.206.85/32	10.2.206.85 – 10.2.206.85	10.2.206.85
87	10.2.206.86/32	10.2.206.86 – 10.2.206.86	10.2.206.86
88	10.2.206.87/32	10.2.206.87 – 10.2.206.87	10.2.206.87
89	10.2.206.88/32	10.2.206.88 – 10.2.206.88	10.2.206.88
90	10.2.206.89/32	10.2.206.89 – 10.2.206.89	10.2.206.89
91	10.2.206.90/32	10.2.206.90 – 10.2.206.90	10.2.206.90
92	10.2.206.91/32	10.2.206.91 – 10.2.206.91	10.2.206.91
93	10.2.206.92/32	10.2.206.92 – 10.2.206.92	10.2.206.92
94	10.2.206.93/32	10.2.206.93 – 10.2.206.93	10.2.206.93
95	10.2.206.94/32	10.2.206.94 – 10.2.206.94	10.2.206.94
96	10.2.206.95/32	10.2.206.95 – 10.2.206.95	10.2.206.95
97	10.2.206.96/32	10.2.206.96 – 10.2.206.96	10.2.206.96
98	10.2.206.97/32	10.2.206.97 – 10.2.206.97	10.2.206.97
99	10.2.206.98/32	10.2.206.98 – 10.2.206.98	10.2.206.98
100	10.2.206.99/32	10.2.206.99 – 10.2.206.99	10.2.206.99
101	10.2.206.100/32	10.2.206.100 – 10.2.206.100	10.2.206.100
102	10.2.206.101/32	10.2.206.101 – 10.2.206.101	10.2.206.101
103	10.2.206.102/32	10.2.206.102 – 10.2.206.102	10.2.206.102
104	10.2.206.103/32	10.2.206.103 – 10.2.206.103	10.2.206.103
105	10.2.206.104/32	10.2.206.104 – 10.2.206.104	10.2.206.104
106	10.2.206.105/32	10.2.206.105 – 10.2.206.105	10.2.206.105
107	10.2.206.106/32	10.2.206.106 – 10.2.206.106	10.2.206.106
108	10.2.206.107/32	10.2.206.107 – 10.2.206.107	10.2.206.107
109	10.2.206.108/32	10.2.206.108 – 10.2.206.108	10.2.206.108
110	10.2.206.109/32	10.2.206.109 – 10.2.206.109	10.2.206.109
111	10.2.206.110/32	10.2.206.110 – 10.2.206.110	10.2.206.110
112	10.2.206.111/32	10.2.206.111 – 10.2.206.111	10.2.206.111
113	10.2.206.112/32	10.2.206.112 – 10.2.206.112	10.2.206.112
114	10.2.206.113/32	10.2.206.113 – 10.2.206.113	10.2.206.113
115	10.2.206.114/32	10.2.206.114 – 10.2.206.114	10.2.206.114
116	10.2.206.115/32	10.2.206.115 – 10.2.206.115	10.2.206.115
117	10.2.206.116/32	10.2.206.116 – 10.2.206.116	10.2.206.116
118	10.2.206.117/32	10.2.206.117 – 10.2.206.117	10.2.206.117
119	10.2.206.118/32	10.2.206.118 – 10.2.206.118	10.2.206.118
120	10.2.206.119/32	10.2.206.119 – 10.2.206.119	10.2.206.119
121	10.2.206.120/32	10.2.206.120 – 10.2.206.120	10.2.206.120
122	10.2.206.121/32	10.2.206.121 – 10.2.206.121	10.2.206.121
123	10.2.206.122/32	10.2.206.122 – 10.2.206.122	10.2.206.122
124	10.2.206.123/32	10.2.206.123 – 10.2.206.123	10.2.206.123
125	10.2.206.124/32	10.2.206.124 – 10.2.206.124	10.2.206.124
126	10.2.206.125/32	10.2.206.125 – 10.2.206.125	10.2.206.125
127	10.2.206.126/32	10.2.206.126 – 10.2.206.126	10.2.206.126
128	10.2.206.127/32	10.2.206.127 – 10.2.206.127	10.2.206.127
129	10.2.206.128/32	10.2.206.128 – 10.2.206.128	10.2.206.128
130	10.2.206.129/32	10.2.206.129 – 10.2.206.129	10.2.206.129
131	10.2.206.130/32	10.2.206.130 – 10.2.206.130	10.2.206.130
132	10.2.206.131/32	10.2.206.131 – 10.2.206.131	10.2.206.131
133	10.2.206.132/32	10.2.206.132 – 10.2.206.132	10.2.206.132
134	10.2.206.133/32	10.2.206.133 – 10.2.206.133	10.2.206.133
135	10.2.206.134/32	10.2.206.134 – 10.2.206.134	10.2.206.134
136	10.2.206.135/32	10.2.206.135 – 10.2.206.135	10.2.206.135
137	10.2.206.136/32	10.2.206.136 – 10.2.206.136	10.2.206.136
138	10.2.206.137/32	10.2.206.137 – 10.2.206.137	10.2.206.137
139	10.2.206.138/32	10.2.206.138 – 10.2.206.138	10.2.206.138
140	10.2.206.139/32	10.2.206.139 – 10.2.206.139	10.2.206.139
141	10.2.206.140/32	10.2.206.140 – 10.2.206.140	10.2.206.140
142	10.2.206.141/32	10.2.206.141 – 10.2.206.141	10.2.206.141
143	10.2.206.142/32	10.2.206.142 – 10.2.206.142	10.2.206.142
144	10.2.206.143/32	10.2.206.143 – 10.2.206.143	10.2.206.143
145	10.2.206.144/32	10.2.206.144 – 10.2.206.144	10.2.206.144
146	10.2.206.145/32	10.2.206.145 – 10.2.206.145	10.2.206.145
147	10.2.206.146/32	10.2.206.146 – 10.2.206.146	10.2.206.146
148	10.2.206.147/32	10.2.206.147 – 10.2.206.147	10.2.206.147
149	10.2.206.148/32	10.2.206.148 – 10.2.206.148	10.2.206.148
150	10.2.206.149/32	10.2.206.149 – 10.2.206.149	10.2.206.149
151	10.2.206.150/32	10.2.206.150 – 10.2.206.150	10.2.206.150
152	10.2.206.151/32	10.2.206.151 – 10.2.206.151	10.2.206.151
153	10.2.206.152/32	10.2.206.152 – 10.2.206.152	10.2.206.152
154	10.2.206.153/32	10.2.206.153 – 10.2.206.153	10.2.206.153
155	10.2.206.154/32	10.2.206.154 – 10.2.206.154	10.2.206.154
156	10.2.206.155/32	10.2.206.155 – 10.2.206.155	10.2.206.155
157	10.2.206.156/32	10.2.206.156 – 10.2.206.156	10.2.206.156
158	10.2.206.157/32	10.2.206.157 – 10.2.206.157	10.2.206.157
159	10.2.206.158/32	10.2.206.158 – 10.2.206.158	10.2.206.158
160	10.2.206.159/32	10.2.206.159 – 10.2.206.159	10.2.206.159
161	10.2.206.160/32	10.2.206.160 – 10.2.206.160	10.2.206.160
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210	10.2.206.209/32	10.2.206.209 – 10.2.206.209	10.2.206.209
211	10.2.206.210/32	10.2.206.210 – 10.2.206.210	10.2.206.210
212	10.2.206.211/32	10.2.206.211 – 10.2.206.211	10.2.206.211
213	10.2.206.212/32	10.2.206.212 – 10.2.206.212	10.2.206.212
214	10.2.206.213/32	10.2.206.213 – 10.2.206.213	10.2.206.213
215	10.2.206.214/32	10.2.206.214 – 10.2.206.214	10.2.206.214
216	10.2.206.215/32	10.2.206.215 – 10.2.206.215	10.2.206.215
217	10.2.206.216/32	10.2.206.216 – 10.2.206.216	10.2.206.216
218	10.2.206.217/32	10.2.206.217 – 10.2.206.217	10.2.206.217
219	10.2.206.218/32	10.2.206.218 – 10.2.206.218	10.2.206.218
220	10.2.206.219/32	10.2.206.219 – 10.2.206.219	10.2.206.219
221	10.2.206.220/32	10.2.206.220 – 10.2.206.220	10.2.206.220
222	10.2.206.221/32	10.2.206.221 – 10.2.206.221	10.2.206.221
223	10.2.206.222/32	10.2.206.222 – 10.2.206.222	10.2.206.222
224	10.2.206.223/32	10.2.206.223 – 10.2.206.223	10.2.206.223
225	10.2.206.224/32	10.2.206.224 – 10.2.206.224	10.2.206.224
226	10.2.206.225/32	10.2.206.225 – 10.2.206.225	10.2.206.225
227	10.2.206.226/32	10.2.206.226 – 10.2.206.226	10.2.206.226
228	10.2.206.227/32	10.2.206.227 – 10.2.206.227	10.2.206.227
229	10.2.206.228/32	10.2.206.228 – 10.2.206.228	10.2.206.228
230	10.2.206.229/32	10.2.206.229 – 10.2.206.229	10.2.206.229
231	10.2.206.230/32	10.2.206.230 – 10.2.206.230	10.2.206.230
232	10.2.206.231/32	10.2.206.231 – 10.2.206.231	10.2.206.231
233	10.2.206.232/32	10.2.206.232 – 10.2.206.232	10.2.206.232
234	10.2.206.233/32	10.2.206.233 – 10.2.206.233	10.2.206.233
235	10.2.206.234/32	10.2.206.234 – 10.2.206.234	10.2.206.234
236	10.2.206.235/32	10.2.206.235 – 10.2.206.235	10.2.206.235
237	10.2.206.236/32	10.2.206.236 – 10.2.206.236	10.2.206.236
238	10.2.206.237/32	10.2.206.237 – 10.2.206.237	10.2.206.237
239	10.2.206.238/32	10.2.206.238 – 10.2.206.238	10.2.206.238
240	10.2.206.239/32	10.2.206.239 – 10.2.206.239	10.2.206.239
241	10.2.206.240/32	10.2.206.240 – 10.2.206.240	10.2.206.240
242	10.2.206.241/32	10.2.206.241 – 10.2.206.241	10.2.206.241
243	10.2.206.242/32	10.2.206.242 – 10.2.206.242	10.2.206.242
244	10.2.206.243/32	10.2.206.243 – 10.2.206.243	10.2.206.243
245	10.2.206.244/32	10.2.206.244 – 10.2.206.244	10.2.206.244
246	10.2.206.245/32	10.2.206.245 – 10.2.206.245	10.2.206.245
247	10.2.206.246/32	10.2.206.246 – 10.2.206.246	10.2.206.246
248	10.2.206.247/32	10.2.206.247 – 10.2.206.247	10.2.206.247
249	10.2.206.248/32	10.2.206.248 – 10.2.206.248	10.2.206.248
250	10.2.206.249/32	10.2.206.249 – 10.2.206.249	10.2.206.249
251	10.2.206.250/32	10.2.206.250 – 10.2.206.250	10.2.206.250
252	10.2.206.251/32	10.2.206.251 – 10.2.206.251	10.2.206.251
253	10.2.206.252/32	10.2.206.252 – 10.2.206.252	10.2.206.252
254	10.2.206.253/32	10.2.206.253 – 10.2.206.253	10.2.206.253
255	10.2.206.254/32	10.2.206.254 – 10.2.206.254	10.2.206.254
256	10.2.206.255/32	10.2.206.255 – 10.2.206.255	10.2.206.255

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 →