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)10.167.190.0/24

network10.167.190.0/24

broadcast10.167.190.255

first host10.167.190.1

last host10.167.190.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.190.0/24

address00001010.10100111.10111110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.10111110.00000000

broadcast00001010.10100111.10111110.11111111

green = network part, grey = host part

hex0x0aa7be00

decimal178765312

reverse dns0.190.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:be00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.190.0/31	10.167.190.0 – 10.167.190.1	10.167.190.1
2	10.167.190.2/31	10.167.190.2 – 10.167.190.3	10.167.190.3
3	10.167.190.4/31	10.167.190.4 – 10.167.190.5	10.167.190.5
4	10.167.190.6/31	10.167.190.6 – 10.167.190.7	10.167.190.7
5	10.167.190.8/31	10.167.190.8 – 10.167.190.9	10.167.190.9
6	10.167.190.10/31	10.167.190.10 – 10.167.190.11	10.167.190.11
7	10.167.190.12/31	10.167.190.12 – 10.167.190.13	10.167.190.13
8	10.167.190.14/31	10.167.190.14 – 10.167.190.15	10.167.190.15
9	10.167.190.16/31	10.167.190.16 – 10.167.190.17	10.167.190.17
10	10.167.190.18/31	10.167.190.18 – 10.167.190.19	10.167.190.19
11	10.167.190.20/31	10.167.190.20 – 10.167.190.21	10.167.190.21
12	10.167.190.22/31	10.167.190.22 – 10.167.190.23	10.167.190.23
13	10.167.190.24/31	10.167.190.24 – 10.167.190.25	10.167.190.25
14	10.167.190.26/31	10.167.190.26 – 10.167.190.27	10.167.190.27
15	10.167.190.28/31	10.167.190.28 – 10.167.190.29	10.167.190.29
16	10.167.190.30/31	10.167.190.30 – 10.167.190.31	10.167.190.31
17	10.167.190.32/31	10.167.190.32 – 10.167.190.33	10.167.190.33
18	10.167.190.34/31	10.167.190.34 – 10.167.190.35	10.167.190.35
19	10.167.190.36/31	10.167.190.36 – 10.167.190.37	10.167.190.37
20	10.167.190.38/31	10.167.190.38 – 10.167.190.39	10.167.190.39
21	10.167.190.40/31	10.167.190.40 – 10.167.190.41	10.167.190.41
22	10.167.190.42/31	10.167.190.42 – 10.167.190.43	10.167.190.43
23	10.167.190.44/31	10.167.190.44 – 10.167.190.45	10.167.190.45
24	10.167.190.46/31	10.167.190.46 – 10.167.190.47	10.167.190.47
25	10.167.190.48/31	10.167.190.48 – 10.167.190.49	10.167.190.49
26	10.167.190.50/31	10.167.190.50 – 10.167.190.51	10.167.190.51
27	10.167.190.52/31	10.167.190.52 – 10.167.190.53	10.167.190.53
28	10.167.190.54/31	10.167.190.54 – 10.167.190.55	10.167.190.55
29	10.167.190.56/31	10.167.190.56 – 10.167.190.57	10.167.190.57
30	10.167.190.58/31	10.167.190.58 – 10.167.190.59	10.167.190.59
31	10.167.190.60/31	10.167.190.60 – 10.167.190.61	10.167.190.61
32	10.167.190.62/31	10.167.190.62 – 10.167.190.63	10.167.190.63
33	10.167.190.64/31	10.167.190.64 – 10.167.190.65	10.167.190.65
34	10.167.190.66/31	10.167.190.66 – 10.167.190.67	10.167.190.67
35	10.167.190.68/31	10.167.190.68 – 10.167.190.69	10.167.190.69
36	10.167.190.70/31	10.167.190.70 – 10.167.190.71	10.167.190.71
37	10.167.190.72/31	10.167.190.72 – 10.167.190.73	10.167.190.73
38	10.167.190.74/31	10.167.190.74 – 10.167.190.75	10.167.190.75
39	10.167.190.76/31	10.167.190.76 – 10.167.190.77	10.167.190.77
40	10.167.190.78/31	10.167.190.78 – 10.167.190.79	10.167.190.79
41	10.167.190.80/31	10.167.190.80 – 10.167.190.81	10.167.190.81
42	10.167.190.82/31	10.167.190.82 – 10.167.190.83	10.167.190.83
43	10.167.190.84/31	10.167.190.84 – 10.167.190.85	10.167.190.85
44	10.167.190.86/31	10.167.190.86 – 10.167.190.87	10.167.190.87
45	10.167.190.88/31	10.167.190.88 – 10.167.190.89	10.167.190.89
46	10.167.190.90/31	10.167.190.90 – 10.167.190.91	10.167.190.91
47	10.167.190.92/31	10.167.190.92 – 10.167.190.93	10.167.190.93
48	10.167.190.94/31	10.167.190.94 – 10.167.190.95	10.167.190.95
49	10.167.190.96/31	10.167.190.96 – 10.167.190.97	10.167.190.97
50	10.167.190.98/31	10.167.190.98 – 10.167.190.99	10.167.190.99
51	10.167.190.100/31	10.167.190.100 – 10.167.190.101	10.167.190.101
52	10.167.190.102/31	10.167.190.102 – 10.167.190.103	10.167.190.103
53	10.167.190.104/31	10.167.190.104 – 10.167.190.105	10.167.190.105
54	10.167.190.106/31	10.167.190.106 – 10.167.190.107	10.167.190.107
55	10.167.190.108/31	10.167.190.108 – 10.167.190.109	10.167.190.109
56	10.167.190.110/31	10.167.190.110 – 10.167.190.111	10.167.190.111
57	10.167.190.112/31	10.167.190.112 – 10.167.190.113	10.167.190.113
58	10.167.190.114/31	10.167.190.114 – 10.167.190.115	10.167.190.115
59	10.167.190.116/31	10.167.190.116 – 10.167.190.117	10.167.190.117
60	10.167.190.118/31	10.167.190.118 – 10.167.190.119	10.167.190.119
61	10.167.190.120/31	10.167.190.120 – 10.167.190.121	10.167.190.121
62	10.167.190.122/31	10.167.190.122 – 10.167.190.123	10.167.190.123
63	10.167.190.124/31	10.167.190.124 – 10.167.190.125	10.167.190.125
64	10.167.190.126/31	10.167.190.126 – 10.167.190.127	10.167.190.127
65	10.167.190.128/31	10.167.190.128 – 10.167.190.129	10.167.190.129
66	10.167.190.130/31	10.167.190.130 – 10.167.190.131	10.167.190.131
67	10.167.190.132/31	10.167.190.132 – 10.167.190.133	10.167.190.133
68	10.167.190.134/31	10.167.190.134 – 10.167.190.135	10.167.190.135
69	10.167.190.136/31	10.167.190.136 – 10.167.190.137	10.167.190.137
70	10.167.190.138/31	10.167.190.138 – 10.167.190.139	10.167.190.139
71	10.167.190.140/31	10.167.190.140 – 10.167.190.141	10.167.190.141
72	10.167.190.142/31	10.167.190.142 – 10.167.190.143	10.167.190.143
73	10.167.190.144/31	10.167.190.144 – 10.167.190.145	10.167.190.145
74	10.167.190.146/31	10.167.190.146 – 10.167.190.147	10.167.190.147
75	10.167.190.148/31	10.167.190.148 – 10.167.190.149	10.167.190.149
76	10.167.190.150/31	10.167.190.150 – 10.167.190.151	10.167.190.151
77	10.167.190.152/31	10.167.190.152 – 10.167.190.153	10.167.190.153
78	10.167.190.154/31	10.167.190.154 – 10.167.190.155	10.167.190.155
79	10.167.190.156/31	10.167.190.156 – 10.167.190.157	10.167.190.157
80	10.167.190.158/31	10.167.190.158 – 10.167.190.159	10.167.190.159
81	10.167.190.160/31	10.167.190.160 – 10.167.190.161	10.167.190.161
82	10.167.190.162/31	10.167.190.162 – 10.167.190.163	10.167.190.163
83	10.167.190.164/31	10.167.190.164 – 10.167.190.165	10.167.190.165
84	10.167.190.166/31	10.167.190.166 – 10.167.190.167	10.167.190.167
85	10.167.190.168/31	10.167.190.168 – 10.167.190.169	10.167.190.169
86	10.167.190.170/31	10.167.190.170 – 10.167.190.171	10.167.190.171
87	10.167.190.172/31	10.167.190.172 – 10.167.190.173	10.167.190.173
88	10.167.190.174/31	10.167.190.174 – 10.167.190.175	10.167.190.175
89	10.167.190.176/31	10.167.190.176 – 10.167.190.177	10.167.190.177
90	10.167.190.178/31	10.167.190.178 – 10.167.190.179	10.167.190.179
91	10.167.190.180/31	10.167.190.180 – 10.167.190.181	10.167.190.181
92	10.167.190.182/31	10.167.190.182 – 10.167.190.183	10.167.190.183
93	10.167.190.184/31	10.167.190.184 – 10.167.190.185	10.167.190.185
94	10.167.190.186/31	10.167.190.186 – 10.167.190.187	10.167.190.187
95	10.167.190.188/31	10.167.190.188 – 10.167.190.189	10.167.190.189
96	10.167.190.190/31	10.167.190.190 – 10.167.190.191	10.167.190.191
97	10.167.190.192/31	10.167.190.192 – 10.167.190.193	10.167.190.193
98	10.167.190.194/31	10.167.190.194 – 10.167.190.195	10.167.190.195
99	10.167.190.196/31	10.167.190.196 – 10.167.190.197	10.167.190.197
100	10.167.190.198/31	10.167.190.198 – 10.167.190.199	10.167.190.199
101	10.167.190.200/31	10.167.190.200 – 10.167.190.201	10.167.190.201
102	10.167.190.202/31	10.167.190.202 – 10.167.190.203	10.167.190.203
103	10.167.190.204/31	10.167.190.204 – 10.167.190.205	10.167.190.205
104	10.167.190.206/31	10.167.190.206 – 10.167.190.207	10.167.190.207
105	10.167.190.208/31	10.167.190.208 – 10.167.190.209	10.167.190.209
106	10.167.190.210/31	10.167.190.210 – 10.167.190.211	10.167.190.211
107	10.167.190.212/31	10.167.190.212 – 10.167.190.213	10.167.190.213
108	10.167.190.214/31	10.167.190.214 – 10.167.190.215	10.167.190.215
109	10.167.190.216/31	10.167.190.216 – 10.167.190.217	10.167.190.217
110	10.167.190.218/31	10.167.190.218 – 10.167.190.219	10.167.190.219
111	10.167.190.220/31	10.167.190.220 – 10.167.190.221	10.167.190.221
112	10.167.190.222/31	10.167.190.222 – 10.167.190.223	10.167.190.223
113	10.167.190.224/31	10.167.190.224 – 10.167.190.225	10.167.190.225
114	10.167.190.226/31	10.167.190.226 – 10.167.190.227	10.167.190.227
115	10.167.190.228/31	10.167.190.228 – 10.167.190.229	10.167.190.229
116	10.167.190.230/31	10.167.190.230 – 10.167.190.231	10.167.190.231
117	10.167.190.232/31	10.167.190.232 – 10.167.190.233	10.167.190.233
118	10.167.190.234/31	10.167.190.234 – 10.167.190.235	10.167.190.235
119	10.167.190.236/31	10.167.190.236 – 10.167.190.237	10.167.190.237
120	10.167.190.238/31	10.167.190.238 – 10.167.190.239	10.167.190.239
121	10.167.190.240/31	10.167.190.240 – 10.167.190.241	10.167.190.241
122	10.167.190.242/31	10.167.190.242 – 10.167.190.243	10.167.190.243
123	10.167.190.244/31	10.167.190.244 – 10.167.190.245	10.167.190.245
124	10.167.190.246/31	10.167.190.246 – 10.167.190.247	10.167.190.247
125	10.167.190.248/31	10.167.190.248 – 10.167.190.249	10.167.190.249
126	10.167.190.250/31	10.167.190.250 – 10.167.190.251	10.167.190.251
127	10.167.190.252/31	10.167.190.252 – 10.167.190.253	10.167.190.253
128	10.167.190.254/31	10.167.190.254 – 10.167.190.255	10.167.190.255

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 →