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)10.167.105.0/24

network10.167.105.0/24

broadcast10.167.105.255

first host10.167.105.1

last host10.167.105.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.105.0/24

address00001010.10100111.01101001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.01101001.00000000

broadcast00001010.10100111.01101001.11111111

green = network part, grey = host part

hex0x0aa76900

decimal178743552

reverse dns0.105.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:6900

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.105.0/31	10.167.105.0 – 10.167.105.1	10.167.105.1
2	10.167.105.2/31	10.167.105.2 – 10.167.105.3	10.167.105.3
3	10.167.105.4/31	10.167.105.4 – 10.167.105.5	10.167.105.5
4	10.167.105.6/31	10.167.105.6 – 10.167.105.7	10.167.105.7
5	10.167.105.8/31	10.167.105.8 – 10.167.105.9	10.167.105.9
6	10.167.105.10/31	10.167.105.10 – 10.167.105.11	10.167.105.11
7	10.167.105.12/31	10.167.105.12 – 10.167.105.13	10.167.105.13
8	10.167.105.14/31	10.167.105.14 – 10.167.105.15	10.167.105.15
9	10.167.105.16/31	10.167.105.16 – 10.167.105.17	10.167.105.17
10	10.167.105.18/31	10.167.105.18 – 10.167.105.19	10.167.105.19
11	10.167.105.20/31	10.167.105.20 – 10.167.105.21	10.167.105.21
12	10.167.105.22/31	10.167.105.22 – 10.167.105.23	10.167.105.23
13	10.167.105.24/31	10.167.105.24 – 10.167.105.25	10.167.105.25
14	10.167.105.26/31	10.167.105.26 – 10.167.105.27	10.167.105.27
15	10.167.105.28/31	10.167.105.28 – 10.167.105.29	10.167.105.29
16	10.167.105.30/31	10.167.105.30 – 10.167.105.31	10.167.105.31
17	10.167.105.32/31	10.167.105.32 – 10.167.105.33	10.167.105.33
18	10.167.105.34/31	10.167.105.34 – 10.167.105.35	10.167.105.35
19	10.167.105.36/31	10.167.105.36 – 10.167.105.37	10.167.105.37
20	10.167.105.38/31	10.167.105.38 – 10.167.105.39	10.167.105.39
21	10.167.105.40/31	10.167.105.40 – 10.167.105.41	10.167.105.41
22	10.167.105.42/31	10.167.105.42 – 10.167.105.43	10.167.105.43
23	10.167.105.44/31	10.167.105.44 – 10.167.105.45	10.167.105.45
24	10.167.105.46/31	10.167.105.46 – 10.167.105.47	10.167.105.47
25	10.167.105.48/31	10.167.105.48 – 10.167.105.49	10.167.105.49
26	10.167.105.50/31	10.167.105.50 – 10.167.105.51	10.167.105.51
27	10.167.105.52/31	10.167.105.52 – 10.167.105.53	10.167.105.53
28	10.167.105.54/31	10.167.105.54 – 10.167.105.55	10.167.105.55
29	10.167.105.56/31	10.167.105.56 – 10.167.105.57	10.167.105.57
30	10.167.105.58/31	10.167.105.58 – 10.167.105.59	10.167.105.59
31	10.167.105.60/31	10.167.105.60 – 10.167.105.61	10.167.105.61
32	10.167.105.62/31	10.167.105.62 – 10.167.105.63	10.167.105.63
33	10.167.105.64/31	10.167.105.64 – 10.167.105.65	10.167.105.65
34	10.167.105.66/31	10.167.105.66 – 10.167.105.67	10.167.105.67
35	10.167.105.68/31	10.167.105.68 – 10.167.105.69	10.167.105.69
36	10.167.105.70/31	10.167.105.70 – 10.167.105.71	10.167.105.71
37	10.167.105.72/31	10.167.105.72 – 10.167.105.73	10.167.105.73
38	10.167.105.74/31	10.167.105.74 – 10.167.105.75	10.167.105.75
39	10.167.105.76/31	10.167.105.76 – 10.167.105.77	10.167.105.77
40	10.167.105.78/31	10.167.105.78 – 10.167.105.79	10.167.105.79
41	10.167.105.80/31	10.167.105.80 – 10.167.105.81	10.167.105.81
42	10.167.105.82/31	10.167.105.82 – 10.167.105.83	10.167.105.83
43	10.167.105.84/31	10.167.105.84 – 10.167.105.85	10.167.105.85
44	10.167.105.86/31	10.167.105.86 – 10.167.105.87	10.167.105.87
45	10.167.105.88/31	10.167.105.88 – 10.167.105.89	10.167.105.89
46	10.167.105.90/31	10.167.105.90 – 10.167.105.91	10.167.105.91
47	10.167.105.92/31	10.167.105.92 – 10.167.105.93	10.167.105.93
48	10.167.105.94/31	10.167.105.94 – 10.167.105.95	10.167.105.95
49	10.167.105.96/31	10.167.105.96 – 10.167.105.97	10.167.105.97
50	10.167.105.98/31	10.167.105.98 – 10.167.105.99	10.167.105.99
51	10.167.105.100/31	10.167.105.100 – 10.167.105.101	10.167.105.101
52	10.167.105.102/31	10.167.105.102 – 10.167.105.103	10.167.105.103
53	10.167.105.104/31	10.167.105.104 – 10.167.105.105	10.167.105.105
54	10.167.105.106/31	10.167.105.106 – 10.167.105.107	10.167.105.107
55	10.167.105.108/31	10.167.105.108 – 10.167.105.109	10.167.105.109
56	10.167.105.110/31	10.167.105.110 – 10.167.105.111	10.167.105.111
57	10.167.105.112/31	10.167.105.112 – 10.167.105.113	10.167.105.113
58	10.167.105.114/31	10.167.105.114 – 10.167.105.115	10.167.105.115
59	10.167.105.116/31	10.167.105.116 – 10.167.105.117	10.167.105.117
60	10.167.105.118/31	10.167.105.118 – 10.167.105.119	10.167.105.119
61	10.167.105.120/31	10.167.105.120 – 10.167.105.121	10.167.105.121
62	10.167.105.122/31	10.167.105.122 – 10.167.105.123	10.167.105.123
63	10.167.105.124/31	10.167.105.124 – 10.167.105.125	10.167.105.125
64	10.167.105.126/31	10.167.105.126 – 10.167.105.127	10.167.105.127
65	10.167.105.128/31	10.167.105.128 – 10.167.105.129	10.167.105.129
66	10.167.105.130/31	10.167.105.130 – 10.167.105.131	10.167.105.131
67	10.167.105.132/31	10.167.105.132 – 10.167.105.133	10.167.105.133
68	10.167.105.134/31	10.167.105.134 – 10.167.105.135	10.167.105.135
69	10.167.105.136/31	10.167.105.136 – 10.167.105.137	10.167.105.137
70	10.167.105.138/31	10.167.105.138 – 10.167.105.139	10.167.105.139
71	10.167.105.140/31	10.167.105.140 – 10.167.105.141	10.167.105.141
72	10.167.105.142/31	10.167.105.142 – 10.167.105.143	10.167.105.143
73	10.167.105.144/31	10.167.105.144 – 10.167.105.145	10.167.105.145
74	10.167.105.146/31	10.167.105.146 – 10.167.105.147	10.167.105.147
75	10.167.105.148/31	10.167.105.148 – 10.167.105.149	10.167.105.149
76	10.167.105.150/31	10.167.105.150 – 10.167.105.151	10.167.105.151
77	10.167.105.152/31	10.167.105.152 – 10.167.105.153	10.167.105.153
78	10.167.105.154/31	10.167.105.154 – 10.167.105.155	10.167.105.155
79	10.167.105.156/31	10.167.105.156 – 10.167.105.157	10.167.105.157
80	10.167.105.158/31	10.167.105.158 – 10.167.105.159	10.167.105.159
81	10.167.105.160/31	10.167.105.160 – 10.167.105.161	10.167.105.161
82	10.167.105.162/31	10.167.105.162 – 10.167.105.163	10.167.105.163
83	10.167.105.164/31	10.167.105.164 – 10.167.105.165	10.167.105.165
84	10.167.105.166/31	10.167.105.166 – 10.167.105.167	10.167.105.167
85	10.167.105.168/31	10.167.105.168 – 10.167.105.169	10.167.105.169
86	10.167.105.170/31	10.167.105.170 – 10.167.105.171	10.167.105.171
87	10.167.105.172/31	10.167.105.172 – 10.167.105.173	10.167.105.173
88	10.167.105.174/31	10.167.105.174 – 10.167.105.175	10.167.105.175
89	10.167.105.176/31	10.167.105.176 – 10.167.105.177	10.167.105.177
90	10.167.105.178/31	10.167.105.178 – 10.167.105.179	10.167.105.179
91	10.167.105.180/31	10.167.105.180 – 10.167.105.181	10.167.105.181
92	10.167.105.182/31	10.167.105.182 – 10.167.105.183	10.167.105.183
93	10.167.105.184/31	10.167.105.184 – 10.167.105.185	10.167.105.185
94	10.167.105.186/31	10.167.105.186 – 10.167.105.187	10.167.105.187
95	10.167.105.188/31	10.167.105.188 – 10.167.105.189	10.167.105.189
96	10.167.105.190/31	10.167.105.190 – 10.167.105.191	10.167.105.191
97	10.167.105.192/31	10.167.105.192 – 10.167.105.193	10.167.105.193
98	10.167.105.194/31	10.167.105.194 – 10.167.105.195	10.167.105.195
99	10.167.105.196/31	10.167.105.196 – 10.167.105.197	10.167.105.197
100	10.167.105.198/31	10.167.105.198 – 10.167.105.199	10.167.105.199
101	10.167.105.200/31	10.167.105.200 – 10.167.105.201	10.167.105.201
102	10.167.105.202/31	10.167.105.202 – 10.167.105.203	10.167.105.203
103	10.167.105.204/31	10.167.105.204 – 10.167.105.205	10.167.105.205
104	10.167.105.206/31	10.167.105.206 – 10.167.105.207	10.167.105.207
105	10.167.105.208/31	10.167.105.208 – 10.167.105.209	10.167.105.209
106	10.167.105.210/31	10.167.105.210 – 10.167.105.211	10.167.105.211
107	10.167.105.212/31	10.167.105.212 – 10.167.105.213	10.167.105.213
108	10.167.105.214/31	10.167.105.214 – 10.167.105.215	10.167.105.215
109	10.167.105.216/31	10.167.105.216 – 10.167.105.217	10.167.105.217
110	10.167.105.218/31	10.167.105.218 – 10.167.105.219	10.167.105.219
111	10.167.105.220/31	10.167.105.220 – 10.167.105.221	10.167.105.221
112	10.167.105.222/31	10.167.105.222 – 10.167.105.223	10.167.105.223
113	10.167.105.224/31	10.167.105.224 – 10.167.105.225	10.167.105.225
114	10.167.105.226/31	10.167.105.226 – 10.167.105.227	10.167.105.227
115	10.167.105.228/31	10.167.105.228 – 10.167.105.229	10.167.105.229
116	10.167.105.230/31	10.167.105.230 – 10.167.105.231	10.167.105.231
117	10.167.105.232/31	10.167.105.232 – 10.167.105.233	10.167.105.233
118	10.167.105.234/31	10.167.105.234 – 10.167.105.235	10.167.105.235
119	10.167.105.236/31	10.167.105.236 – 10.167.105.237	10.167.105.237
120	10.167.105.238/31	10.167.105.238 – 10.167.105.239	10.167.105.239
121	10.167.105.240/31	10.167.105.240 – 10.167.105.241	10.167.105.241
122	10.167.105.242/31	10.167.105.242 – 10.167.105.243	10.167.105.243
123	10.167.105.244/31	10.167.105.244 – 10.167.105.245	10.167.105.245
124	10.167.105.246/31	10.167.105.246 – 10.167.105.247	10.167.105.247
125	10.167.105.248/31	10.167.105.248 – 10.167.105.249	10.167.105.249
126	10.167.105.250/31	10.167.105.250 – 10.167.105.251	10.167.105.251
127	10.167.105.252/31	10.167.105.252 – 10.167.105.253	10.167.105.253
128	10.167.105.254/31	10.167.105.254 – 10.167.105.255	10.167.105.255

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 →