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)10.167.164.0/24

network10.167.164.0/24

broadcast10.167.164.255

first host10.167.164.1

last host10.167.164.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.164.0/24

address00001010.10100111.10100100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.10100100.00000000

broadcast00001010.10100111.10100100.11111111

green = network part, grey = host part

hex0x0aa7a400

decimal178758656

reverse dns0.164.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:a400

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.164.0/31	10.167.164.0 – 10.167.164.1	10.167.164.1
2	10.167.164.2/31	10.167.164.2 – 10.167.164.3	10.167.164.3
3	10.167.164.4/31	10.167.164.4 – 10.167.164.5	10.167.164.5
4	10.167.164.6/31	10.167.164.6 – 10.167.164.7	10.167.164.7
5	10.167.164.8/31	10.167.164.8 – 10.167.164.9	10.167.164.9
6	10.167.164.10/31	10.167.164.10 – 10.167.164.11	10.167.164.11
7	10.167.164.12/31	10.167.164.12 – 10.167.164.13	10.167.164.13
8	10.167.164.14/31	10.167.164.14 – 10.167.164.15	10.167.164.15
9	10.167.164.16/31	10.167.164.16 – 10.167.164.17	10.167.164.17
10	10.167.164.18/31	10.167.164.18 – 10.167.164.19	10.167.164.19
11	10.167.164.20/31	10.167.164.20 – 10.167.164.21	10.167.164.21
12	10.167.164.22/31	10.167.164.22 – 10.167.164.23	10.167.164.23
13	10.167.164.24/31	10.167.164.24 – 10.167.164.25	10.167.164.25
14	10.167.164.26/31	10.167.164.26 – 10.167.164.27	10.167.164.27
15	10.167.164.28/31	10.167.164.28 – 10.167.164.29	10.167.164.29
16	10.167.164.30/31	10.167.164.30 – 10.167.164.31	10.167.164.31
17	10.167.164.32/31	10.167.164.32 – 10.167.164.33	10.167.164.33
18	10.167.164.34/31	10.167.164.34 – 10.167.164.35	10.167.164.35
19	10.167.164.36/31	10.167.164.36 – 10.167.164.37	10.167.164.37
20	10.167.164.38/31	10.167.164.38 – 10.167.164.39	10.167.164.39
21	10.167.164.40/31	10.167.164.40 – 10.167.164.41	10.167.164.41
22	10.167.164.42/31	10.167.164.42 – 10.167.164.43	10.167.164.43
23	10.167.164.44/31	10.167.164.44 – 10.167.164.45	10.167.164.45
24	10.167.164.46/31	10.167.164.46 – 10.167.164.47	10.167.164.47
25	10.167.164.48/31	10.167.164.48 – 10.167.164.49	10.167.164.49
26	10.167.164.50/31	10.167.164.50 – 10.167.164.51	10.167.164.51
27	10.167.164.52/31	10.167.164.52 – 10.167.164.53	10.167.164.53
28	10.167.164.54/31	10.167.164.54 – 10.167.164.55	10.167.164.55
29	10.167.164.56/31	10.167.164.56 – 10.167.164.57	10.167.164.57
30	10.167.164.58/31	10.167.164.58 – 10.167.164.59	10.167.164.59
31	10.167.164.60/31	10.167.164.60 – 10.167.164.61	10.167.164.61
32	10.167.164.62/31	10.167.164.62 – 10.167.164.63	10.167.164.63
33	10.167.164.64/31	10.167.164.64 – 10.167.164.65	10.167.164.65
34	10.167.164.66/31	10.167.164.66 – 10.167.164.67	10.167.164.67
35	10.167.164.68/31	10.167.164.68 – 10.167.164.69	10.167.164.69
36	10.167.164.70/31	10.167.164.70 – 10.167.164.71	10.167.164.71
37	10.167.164.72/31	10.167.164.72 – 10.167.164.73	10.167.164.73
38	10.167.164.74/31	10.167.164.74 – 10.167.164.75	10.167.164.75
39	10.167.164.76/31	10.167.164.76 – 10.167.164.77	10.167.164.77
40	10.167.164.78/31	10.167.164.78 – 10.167.164.79	10.167.164.79
41	10.167.164.80/31	10.167.164.80 – 10.167.164.81	10.167.164.81
42	10.167.164.82/31	10.167.164.82 – 10.167.164.83	10.167.164.83
43	10.167.164.84/31	10.167.164.84 – 10.167.164.85	10.167.164.85
44	10.167.164.86/31	10.167.164.86 – 10.167.164.87	10.167.164.87
45	10.167.164.88/31	10.167.164.88 – 10.167.164.89	10.167.164.89
46	10.167.164.90/31	10.167.164.90 – 10.167.164.91	10.167.164.91
47	10.167.164.92/31	10.167.164.92 – 10.167.164.93	10.167.164.93
48	10.167.164.94/31	10.167.164.94 – 10.167.164.95	10.167.164.95
49	10.167.164.96/31	10.167.164.96 – 10.167.164.97	10.167.164.97
50	10.167.164.98/31	10.167.164.98 – 10.167.164.99	10.167.164.99
51	10.167.164.100/31	10.167.164.100 – 10.167.164.101	10.167.164.101
52	10.167.164.102/31	10.167.164.102 – 10.167.164.103	10.167.164.103
53	10.167.164.104/31	10.167.164.104 – 10.167.164.105	10.167.164.105
54	10.167.164.106/31	10.167.164.106 – 10.167.164.107	10.167.164.107
55	10.167.164.108/31	10.167.164.108 – 10.167.164.109	10.167.164.109
56	10.167.164.110/31	10.167.164.110 – 10.167.164.111	10.167.164.111
57	10.167.164.112/31	10.167.164.112 – 10.167.164.113	10.167.164.113
58	10.167.164.114/31	10.167.164.114 – 10.167.164.115	10.167.164.115
59	10.167.164.116/31	10.167.164.116 – 10.167.164.117	10.167.164.117
60	10.167.164.118/31	10.167.164.118 – 10.167.164.119	10.167.164.119
61	10.167.164.120/31	10.167.164.120 – 10.167.164.121	10.167.164.121
62	10.167.164.122/31	10.167.164.122 – 10.167.164.123	10.167.164.123
63	10.167.164.124/31	10.167.164.124 – 10.167.164.125	10.167.164.125
64	10.167.164.126/31	10.167.164.126 – 10.167.164.127	10.167.164.127
65	10.167.164.128/31	10.167.164.128 – 10.167.164.129	10.167.164.129
66	10.167.164.130/31	10.167.164.130 – 10.167.164.131	10.167.164.131
67	10.167.164.132/31	10.167.164.132 – 10.167.164.133	10.167.164.133
68	10.167.164.134/31	10.167.164.134 – 10.167.164.135	10.167.164.135
69	10.167.164.136/31	10.167.164.136 – 10.167.164.137	10.167.164.137
70	10.167.164.138/31	10.167.164.138 – 10.167.164.139	10.167.164.139
71	10.167.164.140/31	10.167.164.140 – 10.167.164.141	10.167.164.141
72	10.167.164.142/31	10.167.164.142 – 10.167.164.143	10.167.164.143
73	10.167.164.144/31	10.167.164.144 – 10.167.164.145	10.167.164.145
74	10.167.164.146/31	10.167.164.146 – 10.167.164.147	10.167.164.147
75	10.167.164.148/31	10.167.164.148 – 10.167.164.149	10.167.164.149
76	10.167.164.150/31	10.167.164.150 – 10.167.164.151	10.167.164.151
77	10.167.164.152/31	10.167.164.152 – 10.167.164.153	10.167.164.153
78	10.167.164.154/31	10.167.164.154 – 10.167.164.155	10.167.164.155
79	10.167.164.156/31	10.167.164.156 – 10.167.164.157	10.167.164.157
80	10.167.164.158/31	10.167.164.158 – 10.167.164.159	10.167.164.159
81	10.167.164.160/31	10.167.164.160 – 10.167.164.161	10.167.164.161
82	10.167.164.162/31	10.167.164.162 – 10.167.164.163	10.167.164.163
83	10.167.164.164/31	10.167.164.164 – 10.167.164.165	10.167.164.165
84	10.167.164.166/31	10.167.164.166 – 10.167.164.167	10.167.164.167
85	10.167.164.168/31	10.167.164.168 – 10.167.164.169	10.167.164.169
86	10.167.164.170/31	10.167.164.170 – 10.167.164.171	10.167.164.171
87	10.167.164.172/31	10.167.164.172 – 10.167.164.173	10.167.164.173
88	10.167.164.174/31	10.167.164.174 – 10.167.164.175	10.167.164.175
89	10.167.164.176/31	10.167.164.176 – 10.167.164.177	10.167.164.177
90	10.167.164.178/31	10.167.164.178 – 10.167.164.179	10.167.164.179
91	10.167.164.180/31	10.167.164.180 – 10.167.164.181	10.167.164.181
92	10.167.164.182/31	10.167.164.182 – 10.167.164.183	10.167.164.183
93	10.167.164.184/31	10.167.164.184 – 10.167.164.185	10.167.164.185
94	10.167.164.186/31	10.167.164.186 – 10.167.164.187	10.167.164.187
95	10.167.164.188/31	10.167.164.188 – 10.167.164.189	10.167.164.189
96	10.167.164.190/31	10.167.164.190 – 10.167.164.191	10.167.164.191
97	10.167.164.192/31	10.167.164.192 – 10.167.164.193	10.167.164.193
98	10.167.164.194/31	10.167.164.194 – 10.167.164.195	10.167.164.195
99	10.167.164.196/31	10.167.164.196 – 10.167.164.197	10.167.164.197
100	10.167.164.198/31	10.167.164.198 – 10.167.164.199	10.167.164.199
101	10.167.164.200/31	10.167.164.200 – 10.167.164.201	10.167.164.201
102	10.167.164.202/31	10.167.164.202 – 10.167.164.203	10.167.164.203
103	10.167.164.204/31	10.167.164.204 – 10.167.164.205	10.167.164.205
104	10.167.164.206/31	10.167.164.206 – 10.167.164.207	10.167.164.207
105	10.167.164.208/31	10.167.164.208 – 10.167.164.209	10.167.164.209
106	10.167.164.210/31	10.167.164.210 – 10.167.164.211	10.167.164.211
107	10.167.164.212/31	10.167.164.212 – 10.167.164.213	10.167.164.213
108	10.167.164.214/31	10.167.164.214 – 10.167.164.215	10.167.164.215
109	10.167.164.216/31	10.167.164.216 – 10.167.164.217	10.167.164.217
110	10.167.164.218/31	10.167.164.218 – 10.167.164.219	10.167.164.219
111	10.167.164.220/31	10.167.164.220 – 10.167.164.221	10.167.164.221
112	10.167.164.222/31	10.167.164.222 – 10.167.164.223	10.167.164.223
113	10.167.164.224/31	10.167.164.224 – 10.167.164.225	10.167.164.225
114	10.167.164.226/31	10.167.164.226 – 10.167.164.227	10.167.164.227
115	10.167.164.228/31	10.167.164.228 – 10.167.164.229	10.167.164.229
116	10.167.164.230/31	10.167.164.230 – 10.167.164.231	10.167.164.231
117	10.167.164.232/31	10.167.164.232 – 10.167.164.233	10.167.164.233
118	10.167.164.234/31	10.167.164.234 – 10.167.164.235	10.167.164.235
119	10.167.164.236/31	10.167.164.236 – 10.167.164.237	10.167.164.237
120	10.167.164.238/31	10.167.164.238 – 10.167.164.239	10.167.164.239
121	10.167.164.240/31	10.167.164.240 – 10.167.164.241	10.167.164.241
122	10.167.164.242/31	10.167.164.242 – 10.167.164.243	10.167.164.243
123	10.167.164.244/31	10.167.164.244 – 10.167.164.245	10.167.164.245
124	10.167.164.246/31	10.167.164.246 – 10.167.164.247	10.167.164.247
125	10.167.164.248/31	10.167.164.248 – 10.167.164.249	10.167.164.249
126	10.167.164.250/31	10.167.164.250 – 10.167.164.251	10.167.164.251
127	10.167.164.252/31	10.167.164.252 – 10.167.164.253	10.167.164.253
128	10.167.164.254/31	10.167.164.254 – 10.167.164.255	10.167.164.255

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 →