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)10.231.86.0/23

network10.231.86.0/23

broadcast10.231.87.255

first host10.231.86.1

last host10.231.87.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.231.86.0/23

address00001010.11100111.01010110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.11100111.01010110.00000000

broadcast00001010.11100111.01010111.11111111

green = network part, grey = host part

hex0x0ae75600

decimal182932992

reverse dns0.86.231.10.in-addr.arpa

ipv4-mapped::ffff:ae7:5600

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.231.86.0/32	10.231.86.0 – 10.231.86.0	10.231.86.0
2	10.231.86.1/32	10.231.86.1 – 10.231.86.1	10.231.86.1
3	10.231.86.2/32	10.231.86.2 – 10.231.86.2	10.231.86.2
4	10.231.86.3/32	10.231.86.3 – 10.231.86.3	10.231.86.3
5	10.231.86.4/32	10.231.86.4 – 10.231.86.4	10.231.86.4
6	10.231.86.5/32	10.231.86.5 – 10.231.86.5	10.231.86.5
7	10.231.86.6/32	10.231.86.6 – 10.231.86.6	10.231.86.6
8	10.231.86.7/32	10.231.86.7 – 10.231.86.7	10.231.86.7
9	10.231.86.8/32	10.231.86.8 – 10.231.86.8	10.231.86.8
10	10.231.86.9/32	10.231.86.9 – 10.231.86.9	10.231.86.9
11	10.231.86.10/32	10.231.86.10 – 10.231.86.10	10.231.86.10
12	10.231.86.11/32	10.231.86.11 – 10.231.86.11	10.231.86.11
13	10.231.86.12/32	10.231.86.12 – 10.231.86.12	10.231.86.12
14	10.231.86.13/32	10.231.86.13 – 10.231.86.13	10.231.86.13
15	10.231.86.14/32	10.231.86.14 – 10.231.86.14	10.231.86.14
16	10.231.86.15/32	10.231.86.15 – 10.231.86.15	10.231.86.15
17	10.231.86.16/32	10.231.86.16 – 10.231.86.16	10.231.86.16
18	10.231.86.17/32	10.231.86.17 – 10.231.86.17	10.231.86.17
19	10.231.86.18/32	10.231.86.18 – 10.231.86.18	10.231.86.18
20	10.231.86.19/32	10.231.86.19 – 10.231.86.19	10.231.86.19
21	10.231.86.20/32	10.231.86.20 – 10.231.86.20	10.231.86.20
22	10.231.86.21/32	10.231.86.21 – 10.231.86.21	10.231.86.21
23	10.231.86.22/32	10.231.86.22 – 10.231.86.22	10.231.86.22
24	10.231.86.23/32	10.231.86.23 – 10.231.86.23	10.231.86.23
25	10.231.86.24/32	10.231.86.24 – 10.231.86.24	10.231.86.24
26	10.231.86.25/32	10.231.86.25 – 10.231.86.25	10.231.86.25
27	10.231.86.26/32	10.231.86.26 – 10.231.86.26	10.231.86.26
28	10.231.86.27/32	10.231.86.27 – 10.231.86.27	10.231.86.27
29	10.231.86.28/32	10.231.86.28 – 10.231.86.28	10.231.86.28
30	10.231.86.29/32	10.231.86.29 – 10.231.86.29	10.231.86.29
31	10.231.86.30/32	10.231.86.30 – 10.231.86.30	10.231.86.30
32	10.231.86.31/32	10.231.86.31 – 10.231.86.31	10.231.86.31
33	10.231.86.32/32	10.231.86.32 – 10.231.86.32	10.231.86.32
34	10.231.86.33/32	10.231.86.33 – 10.231.86.33	10.231.86.33
35	10.231.86.34/32	10.231.86.34 – 10.231.86.34	10.231.86.34
36	10.231.86.35/32	10.231.86.35 – 10.231.86.35	10.231.86.35
37	10.231.86.36/32	10.231.86.36 – 10.231.86.36	10.231.86.36
38	10.231.86.37/32	10.231.86.37 – 10.231.86.37	10.231.86.37
39	10.231.86.38/32	10.231.86.38 – 10.231.86.38	10.231.86.38
40	10.231.86.39/32	10.231.86.39 – 10.231.86.39	10.231.86.39
41	10.231.86.40/32	10.231.86.40 – 10.231.86.40	10.231.86.40
42	10.231.86.41/32	10.231.86.41 – 10.231.86.41	10.231.86.41
43	10.231.86.42/32	10.231.86.42 – 10.231.86.42	10.231.86.42
44	10.231.86.43/32	10.231.86.43 – 10.231.86.43	10.231.86.43
45	10.231.86.44/32	10.231.86.44 – 10.231.86.44	10.231.86.44
46	10.231.86.45/32	10.231.86.45 – 10.231.86.45	10.231.86.45
47	10.231.86.46/32	10.231.86.46 – 10.231.86.46	10.231.86.46
48	10.231.86.47/32	10.231.86.47 – 10.231.86.47	10.231.86.47
49	10.231.86.48/32	10.231.86.48 – 10.231.86.48	10.231.86.48
50	10.231.86.49/32	10.231.86.49 – 10.231.86.49	10.231.86.49
51	10.231.86.50/32	10.231.86.50 – 10.231.86.50	10.231.86.50
52	10.231.86.51/32	10.231.86.51 – 10.231.86.51	10.231.86.51
53	10.231.86.52/32	10.231.86.52 – 10.231.86.52	10.231.86.52
54	10.231.86.53/32	10.231.86.53 – 10.231.86.53	10.231.86.53
55	10.231.86.54/32	10.231.86.54 – 10.231.86.54	10.231.86.54
56	10.231.86.55/32	10.231.86.55 – 10.231.86.55	10.231.86.55
57	10.231.86.56/32	10.231.86.56 – 10.231.86.56	10.231.86.56
58	10.231.86.57/32	10.231.86.57 – 10.231.86.57	10.231.86.57
59	10.231.86.58/32	10.231.86.58 – 10.231.86.58	10.231.86.58
60	10.231.86.59/32	10.231.86.59 – 10.231.86.59	10.231.86.59
61	10.231.86.60/32	10.231.86.60 – 10.231.86.60	10.231.86.60
62	10.231.86.61/32	10.231.86.61 – 10.231.86.61	10.231.86.61
63	10.231.86.62/32	10.231.86.62 – 10.231.86.62	10.231.86.62
64	10.231.86.63/32	10.231.86.63 – 10.231.86.63	10.231.86.63
65	10.231.86.64/32	10.231.86.64 – 10.231.86.64	10.231.86.64
66	10.231.86.65/32	10.231.86.65 – 10.231.86.65	10.231.86.65
67	10.231.86.66/32	10.231.86.66 – 10.231.86.66	10.231.86.66
68	10.231.86.67/32	10.231.86.67 – 10.231.86.67	10.231.86.67
69	10.231.86.68/32	10.231.86.68 – 10.231.86.68	10.231.86.68
70	10.231.86.69/32	10.231.86.69 – 10.231.86.69	10.231.86.69
71	10.231.86.70/32	10.231.86.70 – 10.231.86.70	10.231.86.70
72	10.231.86.71/32	10.231.86.71 – 10.231.86.71	10.231.86.71
73	10.231.86.72/32	10.231.86.72 – 10.231.86.72	10.231.86.72
74	10.231.86.73/32	10.231.86.73 – 10.231.86.73	10.231.86.73
75	10.231.86.74/32	10.231.86.74 – 10.231.86.74	10.231.86.74
76	10.231.86.75/32	10.231.86.75 – 10.231.86.75	10.231.86.75
77	10.231.86.76/32	10.231.86.76 – 10.231.86.76	10.231.86.76
78	10.231.86.77/32	10.231.86.77 – 10.231.86.77	10.231.86.77
79	10.231.86.78/32	10.231.86.78 – 10.231.86.78	10.231.86.78
80	10.231.86.79/32	10.231.86.79 – 10.231.86.79	10.231.86.79
81	10.231.86.80/32	10.231.86.80 – 10.231.86.80	10.231.86.80
82	10.231.86.81/32	10.231.86.81 – 10.231.86.81	10.231.86.81
83	10.231.86.82/32	10.231.86.82 – 10.231.86.82	10.231.86.82
84	10.231.86.83/32	10.231.86.83 – 10.231.86.83	10.231.86.83
85	10.231.86.84/32	10.231.86.84 – 10.231.86.84	10.231.86.84
86	10.231.86.85/32	10.231.86.85 – 10.231.86.85	10.231.86.85
87	10.231.86.86/32	10.231.86.86 – 10.231.86.86	10.231.86.86
88	10.231.86.87/32	10.231.86.87 – 10.231.86.87	10.231.86.87
89	10.231.86.88/32	10.231.86.88 – 10.231.86.88	10.231.86.88
90	10.231.86.89/32	10.231.86.89 – 10.231.86.89	10.231.86.89
91	10.231.86.90/32	10.231.86.90 – 10.231.86.90	10.231.86.90
92	10.231.86.91/32	10.231.86.91 – 10.231.86.91	10.231.86.91
93	10.231.86.92/32	10.231.86.92 – 10.231.86.92	10.231.86.92
94	10.231.86.93/32	10.231.86.93 – 10.231.86.93	10.231.86.93
95	10.231.86.94/32	10.231.86.94 – 10.231.86.94	10.231.86.94
96	10.231.86.95/32	10.231.86.95 – 10.231.86.95	10.231.86.95
97	10.231.86.96/32	10.231.86.96 – 10.231.86.96	10.231.86.96
98	10.231.86.97/32	10.231.86.97 – 10.231.86.97	10.231.86.97
99	10.231.86.98/32	10.231.86.98 – 10.231.86.98	10.231.86.98
100	10.231.86.99/32	10.231.86.99 – 10.231.86.99	10.231.86.99
101	10.231.86.100/32	10.231.86.100 – 10.231.86.100	10.231.86.100
102	10.231.86.101/32	10.231.86.101 – 10.231.86.101	10.231.86.101
103	10.231.86.102/32	10.231.86.102 – 10.231.86.102	10.231.86.102
104	10.231.86.103/32	10.231.86.103 – 10.231.86.103	10.231.86.103
105	10.231.86.104/32	10.231.86.104 – 10.231.86.104	10.231.86.104
106	10.231.86.105/32	10.231.86.105 – 10.231.86.105	10.231.86.105
107	10.231.86.106/32	10.231.86.106 – 10.231.86.106	10.231.86.106
108	10.231.86.107/32	10.231.86.107 – 10.231.86.107	10.231.86.107
109	10.231.86.108/32	10.231.86.108 – 10.231.86.108	10.231.86.108
110	10.231.86.109/32	10.231.86.109 – 10.231.86.109	10.231.86.109
111	10.231.86.110/32	10.231.86.110 – 10.231.86.110	10.231.86.110
112	10.231.86.111/32	10.231.86.111 – 10.231.86.111	10.231.86.111
113	10.231.86.112/32	10.231.86.112 – 10.231.86.112	10.231.86.112
114	10.231.86.113/32	10.231.86.113 – 10.231.86.113	10.231.86.113
115	10.231.86.114/32	10.231.86.114 – 10.231.86.114	10.231.86.114
116	10.231.86.115/32	10.231.86.115 – 10.231.86.115	10.231.86.115
117	10.231.86.116/32	10.231.86.116 – 10.231.86.116	10.231.86.116
118	10.231.86.117/32	10.231.86.117 – 10.231.86.117	10.231.86.117
119	10.231.86.118/32	10.231.86.118 – 10.231.86.118	10.231.86.118
120	10.231.86.119/32	10.231.86.119 – 10.231.86.119	10.231.86.119
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122	10.231.86.121/32	10.231.86.121 – 10.231.86.121	10.231.86.121
123	10.231.86.122/32	10.231.86.122 – 10.231.86.122	10.231.86.122
124	10.231.86.123/32	10.231.86.123 – 10.231.86.123	10.231.86.123
125	10.231.86.124/32	10.231.86.124 – 10.231.86.124	10.231.86.124
126	10.231.86.125/32	10.231.86.125 – 10.231.86.125	10.231.86.125
127	10.231.86.126/32	10.231.86.126 – 10.231.86.126	10.231.86.126
128	10.231.86.127/32	10.231.86.127 – 10.231.86.127	10.231.86.127
129	10.231.86.128/32	10.231.86.128 – 10.231.86.128	10.231.86.128
130	10.231.86.129/32	10.231.86.129 – 10.231.86.129	10.231.86.129
131	10.231.86.130/32	10.231.86.130 – 10.231.86.130	10.231.86.130
132	10.231.86.131/32	10.231.86.131 – 10.231.86.131	10.231.86.131
133	10.231.86.132/32	10.231.86.132 – 10.231.86.132	10.231.86.132
134	10.231.86.133/32	10.231.86.133 – 10.231.86.133	10.231.86.133
135	10.231.86.134/32	10.231.86.134 – 10.231.86.134	10.231.86.134
136	10.231.86.135/32	10.231.86.135 – 10.231.86.135	10.231.86.135
137	10.231.86.136/32	10.231.86.136 – 10.231.86.136	10.231.86.136
138	10.231.86.137/32	10.231.86.137 – 10.231.86.137	10.231.86.137
139	10.231.86.138/32	10.231.86.138 – 10.231.86.138	10.231.86.138
140	10.231.86.139/32	10.231.86.139 – 10.231.86.139	10.231.86.139
141	10.231.86.140/32	10.231.86.140 – 10.231.86.140	10.231.86.140
142	10.231.86.141/32	10.231.86.141 – 10.231.86.141	10.231.86.141
143	10.231.86.142/32	10.231.86.142 – 10.231.86.142	10.231.86.142
144	10.231.86.143/32	10.231.86.143 – 10.231.86.143	10.231.86.143
145	10.231.86.144/32	10.231.86.144 – 10.231.86.144	10.231.86.144
146	10.231.86.145/32	10.231.86.145 – 10.231.86.145	10.231.86.145
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210	10.231.86.209/32	10.231.86.209 – 10.231.86.209	10.231.86.209
211	10.231.86.210/32	10.231.86.210 – 10.231.86.210	10.231.86.210
212	10.231.86.211/32	10.231.86.211 – 10.231.86.211	10.231.86.211
213	10.231.86.212/32	10.231.86.212 – 10.231.86.212	10.231.86.212
214	10.231.86.213/32	10.231.86.213 – 10.231.86.213	10.231.86.213
215	10.231.86.214/32	10.231.86.214 – 10.231.86.214	10.231.86.214
216	10.231.86.215/32	10.231.86.215 – 10.231.86.215	10.231.86.215
217	10.231.86.216/32	10.231.86.216 – 10.231.86.216	10.231.86.216
218	10.231.86.217/32	10.231.86.217 – 10.231.86.217	10.231.86.217
219	10.231.86.218/32	10.231.86.218 – 10.231.86.218	10.231.86.218
220	10.231.86.219/32	10.231.86.219 – 10.231.86.219	10.231.86.219
221	10.231.86.220/32	10.231.86.220 – 10.231.86.220	10.231.86.220
222	10.231.86.221/32	10.231.86.221 – 10.231.86.221	10.231.86.221
223	10.231.86.222/32	10.231.86.222 – 10.231.86.222	10.231.86.222
224	10.231.86.223/32	10.231.86.223 – 10.231.86.223	10.231.86.223
225	10.231.86.224/32	10.231.86.224 – 10.231.86.224	10.231.86.224
226	10.231.86.225/32	10.231.86.225 – 10.231.86.225	10.231.86.225
227	10.231.86.226/32	10.231.86.226 – 10.231.86.226	10.231.86.226
228	10.231.86.227/32	10.231.86.227 – 10.231.86.227	10.231.86.227
229	10.231.86.228/32	10.231.86.228 – 10.231.86.228	10.231.86.228
230	10.231.86.229/32	10.231.86.229 – 10.231.86.229	10.231.86.229
231	10.231.86.230/32	10.231.86.230 – 10.231.86.230	10.231.86.230
232	10.231.86.231/32	10.231.86.231 – 10.231.86.231	10.231.86.231
233	10.231.86.232/32	10.231.86.232 – 10.231.86.232	10.231.86.232
234	10.231.86.233/32	10.231.86.233 – 10.231.86.233	10.231.86.233
235	10.231.86.234/32	10.231.86.234 – 10.231.86.234	10.231.86.234
236	10.231.86.235/32	10.231.86.235 – 10.231.86.235	10.231.86.235
237	10.231.86.236/32	10.231.86.236 – 10.231.86.236	10.231.86.236
238	10.231.86.237/32	10.231.86.237 – 10.231.86.237	10.231.86.237
239	10.231.86.238/32	10.231.86.238 – 10.231.86.238	10.231.86.238
240	10.231.86.239/32	10.231.86.239 – 10.231.86.239	10.231.86.239
241	10.231.86.240/32	10.231.86.240 – 10.231.86.240	10.231.86.240
242	10.231.86.241/32	10.231.86.241 – 10.231.86.241	10.231.86.241
243	10.231.86.242/32	10.231.86.242 – 10.231.86.242	10.231.86.242
244	10.231.86.243/32	10.231.86.243 – 10.231.86.243	10.231.86.243
245	10.231.86.244/32	10.231.86.244 – 10.231.86.244	10.231.86.244
246	10.231.86.245/32	10.231.86.245 – 10.231.86.245	10.231.86.245
247	10.231.86.246/32	10.231.86.246 – 10.231.86.246	10.231.86.246
248	10.231.86.247/32	10.231.86.247 – 10.231.86.247	10.231.86.247
249	10.231.86.248/32	10.231.86.248 – 10.231.86.248	10.231.86.248
250	10.231.86.249/32	10.231.86.249 – 10.231.86.249	10.231.86.249
251	10.231.86.250/32	10.231.86.250 – 10.231.86.250	10.231.86.250
252	10.231.86.251/32	10.231.86.251 – 10.231.86.251	10.231.86.251
253	10.231.86.252/32	10.231.86.252 – 10.231.86.252	10.231.86.252
254	10.231.86.253/32	10.231.86.253 – 10.231.86.253	10.231.86.253
255	10.231.86.254/32	10.231.86.254 – 10.231.86.254	10.231.86.254
256	10.231.86.255/32	10.231.86.255 – 10.231.86.255	10.231.86.255

showing 256 of 512

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →