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)10.167.142.0/24

network10.167.142.0/24

broadcast10.167.142.255

first host10.167.142.1

last host10.167.142.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.142.0/24

address00001010.10100111.10001110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.10001110.00000000

broadcast00001010.10100111.10001110.11111111

green = network part, grey = host part

hex0x0aa78e00

decimal178753024

reverse dns0.142.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:8e00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.142.0/31	10.167.142.0 – 10.167.142.1	10.167.142.1
2	10.167.142.2/31	10.167.142.2 – 10.167.142.3	10.167.142.3
3	10.167.142.4/31	10.167.142.4 – 10.167.142.5	10.167.142.5
4	10.167.142.6/31	10.167.142.6 – 10.167.142.7	10.167.142.7
5	10.167.142.8/31	10.167.142.8 – 10.167.142.9	10.167.142.9
6	10.167.142.10/31	10.167.142.10 – 10.167.142.11	10.167.142.11
7	10.167.142.12/31	10.167.142.12 – 10.167.142.13	10.167.142.13
8	10.167.142.14/31	10.167.142.14 – 10.167.142.15	10.167.142.15
9	10.167.142.16/31	10.167.142.16 – 10.167.142.17	10.167.142.17
10	10.167.142.18/31	10.167.142.18 – 10.167.142.19	10.167.142.19
11	10.167.142.20/31	10.167.142.20 – 10.167.142.21	10.167.142.21
12	10.167.142.22/31	10.167.142.22 – 10.167.142.23	10.167.142.23
13	10.167.142.24/31	10.167.142.24 – 10.167.142.25	10.167.142.25
14	10.167.142.26/31	10.167.142.26 – 10.167.142.27	10.167.142.27
15	10.167.142.28/31	10.167.142.28 – 10.167.142.29	10.167.142.29
16	10.167.142.30/31	10.167.142.30 – 10.167.142.31	10.167.142.31
17	10.167.142.32/31	10.167.142.32 – 10.167.142.33	10.167.142.33
18	10.167.142.34/31	10.167.142.34 – 10.167.142.35	10.167.142.35
19	10.167.142.36/31	10.167.142.36 – 10.167.142.37	10.167.142.37
20	10.167.142.38/31	10.167.142.38 – 10.167.142.39	10.167.142.39
21	10.167.142.40/31	10.167.142.40 – 10.167.142.41	10.167.142.41
22	10.167.142.42/31	10.167.142.42 – 10.167.142.43	10.167.142.43
23	10.167.142.44/31	10.167.142.44 – 10.167.142.45	10.167.142.45
24	10.167.142.46/31	10.167.142.46 – 10.167.142.47	10.167.142.47
25	10.167.142.48/31	10.167.142.48 – 10.167.142.49	10.167.142.49
26	10.167.142.50/31	10.167.142.50 – 10.167.142.51	10.167.142.51
27	10.167.142.52/31	10.167.142.52 – 10.167.142.53	10.167.142.53
28	10.167.142.54/31	10.167.142.54 – 10.167.142.55	10.167.142.55
29	10.167.142.56/31	10.167.142.56 – 10.167.142.57	10.167.142.57
30	10.167.142.58/31	10.167.142.58 – 10.167.142.59	10.167.142.59
31	10.167.142.60/31	10.167.142.60 – 10.167.142.61	10.167.142.61
32	10.167.142.62/31	10.167.142.62 – 10.167.142.63	10.167.142.63
33	10.167.142.64/31	10.167.142.64 – 10.167.142.65	10.167.142.65
34	10.167.142.66/31	10.167.142.66 – 10.167.142.67	10.167.142.67
35	10.167.142.68/31	10.167.142.68 – 10.167.142.69	10.167.142.69
36	10.167.142.70/31	10.167.142.70 – 10.167.142.71	10.167.142.71
37	10.167.142.72/31	10.167.142.72 – 10.167.142.73	10.167.142.73
38	10.167.142.74/31	10.167.142.74 – 10.167.142.75	10.167.142.75
39	10.167.142.76/31	10.167.142.76 – 10.167.142.77	10.167.142.77
40	10.167.142.78/31	10.167.142.78 – 10.167.142.79	10.167.142.79
41	10.167.142.80/31	10.167.142.80 – 10.167.142.81	10.167.142.81
42	10.167.142.82/31	10.167.142.82 – 10.167.142.83	10.167.142.83
43	10.167.142.84/31	10.167.142.84 – 10.167.142.85	10.167.142.85
44	10.167.142.86/31	10.167.142.86 – 10.167.142.87	10.167.142.87
45	10.167.142.88/31	10.167.142.88 – 10.167.142.89	10.167.142.89
46	10.167.142.90/31	10.167.142.90 – 10.167.142.91	10.167.142.91
47	10.167.142.92/31	10.167.142.92 – 10.167.142.93	10.167.142.93
48	10.167.142.94/31	10.167.142.94 – 10.167.142.95	10.167.142.95
49	10.167.142.96/31	10.167.142.96 – 10.167.142.97	10.167.142.97
50	10.167.142.98/31	10.167.142.98 – 10.167.142.99	10.167.142.99
51	10.167.142.100/31	10.167.142.100 – 10.167.142.101	10.167.142.101
52	10.167.142.102/31	10.167.142.102 – 10.167.142.103	10.167.142.103
53	10.167.142.104/31	10.167.142.104 – 10.167.142.105	10.167.142.105
54	10.167.142.106/31	10.167.142.106 – 10.167.142.107	10.167.142.107
55	10.167.142.108/31	10.167.142.108 – 10.167.142.109	10.167.142.109
56	10.167.142.110/31	10.167.142.110 – 10.167.142.111	10.167.142.111
57	10.167.142.112/31	10.167.142.112 – 10.167.142.113	10.167.142.113
58	10.167.142.114/31	10.167.142.114 – 10.167.142.115	10.167.142.115
59	10.167.142.116/31	10.167.142.116 – 10.167.142.117	10.167.142.117
60	10.167.142.118/31	10.167.142.118 – 10.167.142.119	10.167.142.119
61	10.167.142.120/31	10.167.142.120 – 10.167.142.121	10.167.142.121
62	10.167.142.122/31	10.167.142.122 – 10.167.142.123	10.167.142.123
63	10.167.142.124/31	10.167.142.124 – 10.167.142.125	10.167.142.125
64	10.167.142.126/31	10.167.142.126 – 10.167.142.127	10.167.142.127
65	10.167.142.128/31	10.167.142.128 – 10.167.142.129	10.167.142.129
66	10.167.142.130/31	10.167.142.130 – 10.167.142.131	10.167.142.131
67	10.167.142.132/31	10.167.142.132 – 10.167.142.133	10.167.142.133
68	10.167.142.134/31	10.167.142.134 – 10.167.142.135	10.167.142.135
69	10.167.142.136/31	10.167.142.136 – 10.167.142.137	10.167.142.137
70	10.167.142.138/31	10.167.142.138 – 10.167.142.139	10.167.142.139
71	10.167.142.140/31	10.167.142.140 – 10.167.142.141	10.167.142.141
72	10.167.142.142/31	10.167.142.142 – 10.167.142.143	10.167.142.143
73	10.167.142.144/31	10.167.142.144 – 10.167.142.145	10.167.142.145
74	10.167.142.146/31	10.167.142.146 – 10.167.142.147	10.167.142.147
75	10.167.142.148/31	10.167.142.148 – 10.167.142.149	10.167.142.149
76	10.167.142.150/31	10.167.142.150 – 10.167.142.151	10.167.142.151
77	10.167.142.152/31	10.167.142.152 – 10.167.142.153	10.167.142.153
78	10.167.142.154/31	10.167.142.154 – 10.167.142.155	10.167.142.155
79	10.167.142.156/31	10.167.142.156 – 10.167.142.157	10.167.142.157
80	10.167.142.158/31	10.167.142.158 – 10.167.142.159	10.167.142.159
81	10.167.142.160/31	10.167.142.160 – 10.167.142.161	10.167.142.161
82	10.167.142.162/31	10.167.142.162 – 10.167.142.163	10.167.142.163
83	10.167.142.164/31	10.167.142.164 – 10.167.142.165	10.167.142.165
84	10.167.142.166/31	10.167.142.166 – 10.167.142.167	10.167.142.167
85	10.167.142.168/31	10.167.142.168 – 10.167.142.169	10.167.142.169
86	10.167.142.170/31	10.167.142.170 – 10.167.142.171	10.167.142.171
87	10.167.142.172/31	10.167.142.172 – 10.167.142.173	10.167.142.173
88	10.167.142.174/31	10.167.142.174 – 10.167.142.175	10.167.142.175
89	10.167.142.176/31	10.167.142.176 – 10.167.142.177	10.167.142.177
90	10.167.142.178/31	10.167.142.178 – 10.167.142.179	10.167.142.179
91	10.167.142.180/31	10.167.142.180 – 10.167.142.181	10.167.142.181
92	10.167.142.182/31	10.167.142.182 – 10.167.142.183	10.167.142.183
93	10.167.142.184/31	10.167.142.184 – 10.167.142.185	10.167.142.185
94	10.167.142.186/31	10.167.142.186 – 10.167.142.187	10.167.142.187
95	10.167.142.188/31	10.167.142.188 – 10.167.142.189	10.167.142.189
96	10.167.142.190/31	10.167.142.190 – 10.167.142.191	10.167.142.191
97	10.167.142.192/31	10.167.142.192 – 10.167.142.193	10.167.142.193
98	10.167.142.194/31	10.167.142.194 – 10.167.142.195	10.167.142.195
99	10.167.142.196/31	10.167.142.196 – 10.167.142.197	10.167.142.197
100	10.167.142.198/31	10.167.142.198 – 10.167.142.199	10.167.142.199
101	10.167.142.200/31	10.167.142.200 – 10.167.142.201	10.167.142.201
102	10.167.142.202/31	10.167.142.202 – 10.167.142.203	10.167.142.203
103	10.167.142.204/31	10.167.142.204 – 10.167.142.205	10.167.142.205
104	10.167.142.206/31	10.167.142.206 – 10.167.142.207	10.167.142.207
105	10.167.142.208/31	10.167.142.208 – 10.167.142.209	10.167.142.209
106	10.167.142.210/31	10.167.142.210 – 10.167.142.211	10.167.142.211
107	10.167.142.212/31	10.167.142.212 – 10.167.142.213	10.167.142.213
108	10.167.142.214/31	10.167.142.214 – 10.167.142.215	10.167.142.215
109	10.167.142.216/31	10.167.142.216 – 10.167.142.217	10.167.142.217
110	10.167.142.218/31	10.167.142.218 – 10.167.142.219	10.167.142.219
111	10.167.142.220/31	10.167.142.220 – 10.167.142.221	10.167.142.221
112	10.167.142.222/31	10.167.142.222 – 10.167.142.223	10.167.142.223
113	10.167.142.224/31	10.167.142.224 – 10.167.142.225	10.167.142.225
114	10.167.142.226/31	10.167.142.226 – 10.167.142.227	10.167.142.227
115	10.167.142.228/31	10.167.142.228 – 10.167.142.229	10.167.142.229
116	10.167.142.230/31	10.167.142.230 – 10.167.142.231	10.167.142.231
117	10.167.142.232/31	10.167.142.232 – 10.167.142.233	10.167.142.233
118	10.167.142.234/31	10.167.142.234 – 10.167.142.235	10.167.142.235
119	10.167.142.236/31	10.167.142.236 – 10.167.142.237	10.167.142.237
120	10.167.142.238/31	10.167.142.238 – 10.167.142.239	10.167.142.239
121	10.167.142.240/31	10.167.142.240 – 10.167.142.241	10.167.142.241
122	10.167.142.242/31	10.167.142.242 – 10.167.142.243	10.167.142.243
123	10.167.142.244/31	10.167.142.244 – 10.167.142.245	10.167.142.245
124	10.167.142.246/31	10.167.142.246 – 10.167.142.247	10.167.142.247
125	10.167.142.248/31	10.167.142.248 – 10.167.142.249	10.167.142.249
126	10.167.142.250/31	10.167.142.250 – 10.167.142.251	10.167.142.251
127	10.167.142.252/31	10.167.142.252 – 10.167.142.253	10.167.142.253
128	10.167.142.254/31	10.167.142.254 – 10.167.142.255	10.167.142.255

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 →