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)10.167.171.0/24

network10.167.171.0/24

broadcast10.167.171.255

first host10.167.171.1

last host10.167.171.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.171.0/24

address00001010.10100111.10101011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.10101011.00000000

broadcast00001010.10100111.10101011.11111111

green = network part, grey = host part

hex0x0aa7ab00

decimal178760448

reverse dns0.171.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:ab00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.167.171.0/32	10.167.171.0 – 10.167.171.0	10.167.171.0
2	10.167.171.1/32	10.167.171.1 – 10.167.171.1	10.167.171.1
3	10.167.171.2/32	10.167.171.2 – 10.167.171.2	10.167.171.2
4	10.167.171.3/32	10.167.171.3 – 10.167.171.3	10.167.171.3
5	10.167.171.4/32	10.167.171.4 – 10.167.171.4	10.167.171.4
6	10.167.171.5/32	10.167.171.5 – 10.167.171.5	10.167.171.5
7	10.167.171.6/32	10.167.171.6 – 10.167.171.6	10.167.171.6
8	10.167.171.7/32	10.167.171.7 – 10.167.171.7	10.167.171.7
9	10.167.171.8/32	10.167.171.8 – 10.167.171.8	10.167.171.8
10	10.167.171.9/32	10.167.171.9 – 10.167.171.9	10.167.171.9
11	10.167.171.10/32	10.167.171.10 – 10.167.171.10	10.167.171.10
12	10.167.171.11/32	10.167.171.11 – 10.167.171.11	10.167.171.11
13	10.167.171.12/32	10.167.171.12 – 10.167.171.12	10.167.171.12
14	10.167.171.13/32	10.167.171.13 – 10.167.171.13	10.167.171.13
15	10.167.171.14/32	10.167.171.14 – 10.167.171.14	10.167.171.14
16	10.167.171.15/32	10.167.171.15 – 10.167.171.15	10.167.171.15
17	10.167.171.16/32	10.167.171.16 – 10.167.171.16	10.167.171.16
18	10.167.171.17/32	10.167.171.17 – 10.167.171.17	10.167.171.17
19	10.167.171.18/32	10.167.171.18 – 10.167.171.18	10.167.171.18
20	10.167.171.19/32	10.167.171.19 – 10.167.171.19	10.167.171.19
21	10.167.171.20/32	10.167.171.20 – 10.167.171.20	10.167.171.20
22	10.167.171.21/32	10.167.171.21 – 10.167.171.21	10.167.171.21
23	10.167.171.22/32	10.167.171.22 – 10.167.171.22	10.167.171.22
24	10.167.171.23/32	10.167.171.23 – 10.167.171.23	10.167.171.23
25	10.167.171.24/32	10.167.171.24 – 10.167.171.24	10.167.171.24
26	10.167.171.25/32	10.167.171.25 – 10.167.171.25	10.167.171.25
27	10.167.171.26/32	10.167.171.26 – 10.167.171.26	10.167.171.26
28	10.167.171.27/32	10.167.171.27 – 10.167.171.27	10.167.171.27
29	10.167.171.28/32	10.167.171.28 – 10.167.171.28	10.167.171.28
30	10.167.171.29/32	10.167.171.29 – 10.167.171.29	10.167.171.29
31	10.167.171.30/32	10.167.171.30 – 10.167.171.30	10.167.171.30
32	10.167.171.31/32	10.167.171.31 – 10.167.171.31	10.167.171.31
33	10.167.171.32/32	10.167.171.32 – 10.167.171.32	10.167.171.32
34	10.167.171.33/32	10.167.171.33 – 10.167.171.33	10.167.171.33
35	10.167.171.34/32	10.167.171.34 – 10.167.171.34	10.167.171.34
36	10.167.171.35/32	10.167.171.35 – 10.167.171.35	10.167.171.35
37	10.167.171.36/32	10.167.171.36 – 10.167.171.36	10.167.171.36
38	10.167.171.37/32	10.167.171.37 – 10.167.171.37	10.167.171.37
39	10.167.171.38/32	10.167.171.38 – 10.167.171.38	10.167.171.38
40	10.167.171.39/32	10.167.171.39 – 10.167.171.39	10.167.171.39
41	10.167.171.40/32	10.167.171.40 – 10.167.171.40	10.167.171.40
42	10.167.171.41/32	10.167.171.41 – 10.167.171.41	10.167.171.41
43	10.167.171.42/32	10.167.171.42 – 10.167.171.42	10.167.171.42
44	10.167.171.43/32	10.167.171.43 – 10.167.171.43	10.167.171.43
45	10.167.171.44/32	10.167.171.44 – 10.167.171.44	10.167.171.44
46	10.167.171.45/32	10.167.171.45 – 10.167.171.45	10.167.171.45
47	10.167.171.46/32	10.167.171.46 – 10.167.171.46	10.167.171.46
48	10.167.171.47/32	10.167.171.47 – 10.167.171.47	10.167.171.47
49	10.167.171.48/32	10.167.171.48 – 10.167.171.48	10.167.171.48
50	10.167.171.49/32	10.167.171.49 – 10.167.171.49	10.167.171.49
51	10.167.171.50/32	10.167.171.50 – 10.167.171.50	10.167.171.50
52	10.167.171.51/32	10.167.171.51 – 10.167.171.51	10.167.171.51
53	10.167.171.52/32	10.167.171.52 – 10.167.171.52	10.167.171.52
54	10.167.171.53/32	10.167.171.53 – 10.167.171.53	10.167.171.53
55	10.167.171.54/32	10.167.171.54 – 10.167.171.54	10.167.171.54
56	10.167.171.55/32	10.167.171.55 – 10.167.171.55	10.167.171.55
57	10.167.171.56/32	10.167.171.56 – 10.167.171.56	10.167.171.56
58	10.167.171.57/32	10.167.171.57 – 10.167.171.57	10.167.171.57
59	10.167.171.58/32	10.167.171.58 – 10.167.171.58	10.167.171.58
60	10.167.171.59/32	10.167.171.59 – 10.167.171.59	10.167.171.59
61	10.167.171.60/32	10.167.171.60 – 10.167.171.60	10.167.171.60
62	10.167.171.61/32	10.167.171.61 – 10.167.171.61	10.167.171.61
63	10.167.171.62/32	10.167.171.62 – 10.167.171.62	10.167.171.62
64	10.167.171.63/32	10.167.171.63 – 10.167.171.63	10.167.171.63
65	10.167.171.64/32	10.167.171.64 – 10.167.171.64	10.167.171.64
66	10.167.171.65/32	10.167.171.65 – 10.167.171.65	10.167.171.65
67	10.167.171.66/32	10.167.171.66 – 10.167.171.66	10.167.171.66
68	10.167.171.67/32	10.167.171.67 – 10.167.171.67	10.167.171.67
69	10.167.171.68/32	10.167.171.68 – 10.167.171.68	10.167.171.68
70	10.167.171.69/32	10.167.171.69 – 10.167.171.69	10.167.171.69
71	10.167.171.70/32	10.167.171.70 – 10.167.171.70	10.167.171.70
72	10.167.171.71/32	10.167.171.71 – 10.167.171.71	10.167.171.71
73	10.167.171.72/32	10.167.171.72 – 10.167.171.72	10.167.171.72
74	10.167.171.73/32	10.167.171.73 – 10.167.171.73	10.167.171.73
75	10.167.171.74/32	10.167.171.74 – 10.167.171.74	10.167.171.74
76	10.167.171.75/32	10.167.171.75 – 10.167.171.75	10.167.171.75
77	10.167.171.76/32	10.167.171.76 – 10.167.171.76	10.167.171.76
78	10.167.171.77/32	10.167.171.77 – 10.167.171.77	10.167.171.77
79	10.167.171.78/32	10.167.171.78 – 10.167.171.78	10.167.171.78
80	10.167.171.79/32	10.167.171.79 – 10.167.171.79	10.167.171.79
81	10.167.171.80/32	10.167.171.80 – 10.167.171.80	10.167.171.80
82	10.167.171.81/32	10.167.171.81 – 10.167.171.81	10.167.171.81
83	10.167.171.82/32	10.167.171.82 – 10.167.171.82	10.167.171.82
84	10.167.171.83/32	10.167.171.83 – 10.167.171.83	10.167.171.83
85	10.167.171.84/32	10.167.171.84 – 10.167.171.84	10.167.171.84
86	10.167.171.85/32	10.167.171.85 – 10.167.171.85	10.167.171.85
87	10.167.171.86/32	10.167.171.86 – 10.167.171.86	10.167.171.86
88	10.167.171.87/32	10.167.171.87 – 10.167.171.87	10.167.171.87
89	10.167.171.88/32	10.167.171.88 – 10.167.171.88	10.167.171.88
90	10.167.171.89/32	10.167.171.89 – 10.167.171.89	10.167.171.89
91	10.167.171.90/32	10.167.171.90 – 10.167.171.90	10.167.171.90
92	10.167.171.91/32	10.167.171.91 – 10.167.171.91	10.167.171.91
93	10.167.171.92/32	10.167.171.92 – 10.167.171.92	10.167.171.92
94	10.167.171.93/32	10.167.171.93 – 10.167.171.93	10.167.171.93
95	10.167.171.94/32	10.167.171.94 – 10.167.171.94	10.167.171.94
96	10.167.171.95/32	10.167.171.95 – 10.167.171.95	10.167.171.95
97	10.167.171.96/32	10.167.171.96 – 10.167.171.96	10.167.171.96
98	10.167.171.97/32	10.167.171.97 – 10.167.171.97	10.167.171.97
99	10.167.171.98/32	10.167.171.98 – 10.167.171.98	10.167.171.98
100	10.167.171.99/32	10.167.171.99 – 10.167.171.99	10.167.171.99
101	10.167.171.100/32	10.167.171.100 – 10.167.171.100	10.167.171.100
102	10.167.171.101/32	10.167.171.101 – 10.167.171.101	10.167.171.101
103	10.167.171.102/32	10.167.171.102 – 10.167.171.102	10.167.171.102
104	10.167.171.103/32	10.167.171.103 – 10.167.171.103	10.167.171.103
105	10.167.171.104/32	10.167.171.104 – 10.167.171.104	10.167.171.104
106	10.167.171.105/32	10.167.171.105 – 10.167.171.105	10.167.171.105
107	10.167.171.106/32	10.167.171.106 – 10.167.171.106	10.167.171.106
108	10.167.171.107/32	10.167.171.107 – 10.167.171.107	10.167.171.107
109	10.167.171.108/32	10.167.171.108 – 10.167.171.108	10.167.171.108
110	10.167.171.109/32	10.167.171.109 – 10.167.171.109	10.167.171.109
111	10.167.171.110/32	10.167.171.110 – 10.167.171.110	10.167.171.110
112	10.167.171.111/32	10.167.171.111 – 10.167.171.111	10.167.171.111
113	10.167.171.112/32	10.167.171.112 – 10.167.171.112	10.167.171.112
114	10.167.171.113/32	10.167.171.113 – 10.167.171.113	10.167.171.113
115	10.167.171.114/32	10.167.171.114 – 10.167.171.114	10.167.171.114
116	10.167.171.115/32	10.167.171.115 – 10.167.171.115	10.167.171.115
117	10.167.171.116/32	10.167.171.116 – 10.167.171.116	10.167.171.116
118	10.167.171.117/32	10.167.171.117 – 10.167.171.117	10.167.171.117
119	10.167.171.118/32	10.167.171.118 – 10.167.171.118	10.167.171.118
120	10.167.171.119/32	10.167.171.119 – 10.167.171.119	10.167.171.119
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122	10.167.171.121/32	10.167.171.121 – 10.167.171.121	10.167.171.121
123	10.167.171.122/32	10.167.171.122 – 10.167.171.122	10.167.171.122
124	10.167.171.123/32	10.167.171.123 – 10.167.171.123	10.167.171.123
125	10.167.171.124/32	10.167.171.124 – 10.167.171.124	10.167.171.124
126	10.167.171.125/32	10.167.171.125 – 10.167.171.125	10.167.171.125
127	10.167.171.126/32	10.167.171.126 – 10.167.171.126	10.167.171.126
128	10.167.171.127/32	10.167.171.127 – 10.167.171.127	10.167.171.127
129	10.167.171.128/32	10.167.171.128 – 10.167.171.128	10.167.171.128
130	10.167.171.129/32	10.167.171.129 – 10.167.171.129	10.167.171.129
131	10.167.171.130/32	10.167.171.130 – 10.167.171.130	10.167.171.130
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133	10.167.171.132/32	10.167.171.132 – 10.167.171.132	10.167.171.132
134	10.167.171.133/32	10.167.171.133 – 10.167.171.133	10.167.171.133
135	10.167.171.134/32	10.167.171.134 – 10.167.171.134	10.167.171.134
136	10.167.171.135/32	10.167.171.135 – 10.167.171.135	10.167.171.135
137	10.167.171.136/32	10.167.171.136 – 10.167.171.136	10.167.171.136
138	10.167.171.137/32	10.167.171.137 – 10.167.171.137	10.167.171.137
139	10.167.171.138/32	10.167.171.138 – 10.167.171.138	10.167.171.138
140	10.167.171.139/32	10.167.171.139 – 10.167.171.139	10.167.171.139
141	10.167.171.140/32	10.167.171.140 – 10.167.171.140	10.167.171.140
142	10.167.171.141/32	10.167.171.141 – 10.167.171.141	10.167.171.141
143	10.167.171.142/32	10.167.171.142 – 10.167.171.142	10.167.171.142
144	10.167.171.143/32	10.167.171.143 – 10.167.171.143	10.167.171.143
145	10.167.171.144/32	10.167.171.144 – 10.167.171.144	10.167.171.144
146	10.167.171.145/32	10.167.171.145 – 10.167.171.145	10.167.171.145
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148	10.167.171.147/32	10.167.171.147 – 10.167.171.147	10.167.171.147
149	10.167.171.148/32	10.167.171.148 – 10.167.171.148	10.167.171.148
150	10.167.171.149/32	10.167.171.149 – 10.167.171.149	10.167.171.149
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210	10.167.171.209/32	10.167.171.209 – 10.167.171.209	10.167.171.209
211	10.167.171.210/32	10.167.171.210 – 10.167.171.210	10.167.171.210
212	10.167.171.211/32	10.167.171.211 – 10.167.171.211	10.167.171.211
213	10.167.171.212/32	10.167.171.212 – 10.167.171.212	10.167.171.212
214	10.167.171.213/32	10.167.171.213 – 10.167.171.213	10.167.171.213
215	10.167.171.214/32	10.167.171.214 – 10.167.171.214	10.167.171.214
216	10.167.171.215/32	10.167.171.215 – 10.167.171.215	10.167.171.215
217	10.167.171.216/32	10.167.171.216 – 10.167.171.216	10.167.171.216
218	10.167.171.217/32	10.167.171.217 – 10.167.171.217	10.167.171.217
219	10.167.171.218/32	10.167.171.218 – 10.167.171.218	10.167.171.218
220	10.167.171.219/32	10.167.171.219 – 10.167.171.219	10.167.171.219
221	10.167.171.220/32	10.167.171.220 – 10.167.171.220	10.167.171.220
222	10.167.171.221/32	10.167.171.221 – 10.167.171.221	10.167.171.221
223	10.167.171.222/32	10.167.171.222 – 10.167.171.222	10.167.171.222
224	10.167.171.223/32	10.167.171.223 – 10.167.171.223	10.167.171.223
225	10.167.171.224/32	10.167.171.224 – 10.167.171.224	10.167.171.224
226	10.167.171.225/32	10.167.171.225 – 10.167.171.225	10.167.171.225
227	10.167.171.226/32	10.167.171.226 – 10.167.171.226	10.167.171.226
228	10.167.171.227/32	10.167.171.227 – 10.167.171.227	10.167.171.227
229	10.167.171.228/32	10.167.171.228 – 10.167.171.228	10.167.171.228
230	10.167.171.229/32	10.167.171.229 – 10.167.171.229	10.167.171.229
231	10.167.171.230/32	10.167.171.230 – 10.167.171.230	10.167.171.230
232	10.167.171.231/32	10.167.171.231 – 10.167.171.231	10.167.171.231
233	10.167.171.232/32	10.167.171.232 – 10.167.171.232	10.167.171.232
234	10.167.171.233/32	10.167.171.233 – 10.167.171.233	10.167.171.233
235	10.167.171.234/32	10.167.171.234 – 10.167.171.234	10.167.171.234
236	10.167.171.235/32	10.167.171.235 – 10.167.171.235	10.167.171.235
237	10.167.171.236/32	10.167.171.236 – 10.167.171.236	10.167.171.236
238	10.167.171.237/32	10.167.171.237 – 10.167.171.237	10.167.171.237
239	10.167.171.238/32	10.167.171.238 – 10.167.171.238	10.167.171.238
240	10.167.171.239/32	10.167.171.239 – 10.167.171.239	10.167.171.239
241	10.167.171.240/32	10.167.171.240 – 10.167.171.240	10.167.171.240
242	10.167.171.241/32	10.167.171.241 – 10.167.171.241	10.167.171.241
243	10.167.171.242/32	10.167.171.242 – 10.167.171.242	10.167.171.242
244	10.167.171.243/32	10.167.171.243 – 10.167.171.243	10.167.171.243
245	10.167.171.244/32	10.167.171.244 – 10.167.171.244	10.167.171.244
246	10.167.171.245/32	10.167.171.245 – 10.167.171.245	10.167.171.245
247	10.167.171.246/32	10.167.171.246 – 10.167.171.246	10.167.171.246
248	10.167.171.247/32	10.167.171.247 – 10.167.171.247	10.167.171.247
249	10.167.171.248/32	10.167.171.248 – 10.167.171.248	10.167.171.248
250	10.167.171.249/32	10.167.171.249 – 10.167.171.249	10.167.171.249
251	10.167.171.250/32	10.167.171.250 – 10.167.171.250	10.167.171.250
252	10.167.171.251/32	10.167.171.251 – 10.167.171.251	10.167.171.251
253	10.167.171.252/32	10.167.171.252 – 10.167.171.252	10.167.171.252
254	10.167.171.253/32	10.167.171.253 – 10.167.171.253	10.167.171.253
255	10.167.171.254/32	10.167.171.254 – 10.167.171.254	10.167.171.254
256	10.167.171.255/32	10.167.171.255 – 10.167.171.255	10.167.171.255

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 →