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)10.167.179.0/24

network10.167.179.0/24

broadcast10.167.179.255

first host10.167.179.1

last host10.167.179.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.179.0/24

address00001010.10100111.10110011.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.10110011.00000000

broadcast00001010.10100111.10110011.11111111

green = network part, grey = host part

hex0x0aa7b300

decimal178762496

reverse dns0.179.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:b300

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.179.0/31	10.167.179.0 – 10.167.179.1	10.167.179.1
2	10.167.179.2/31	10.167.179.2 – 10.167.179.3	10.167.179.3
3	10.167.179.4/31	10.167.179.4 – 10.167.179.5	10.167.179.5
4	10.167.179.6/31	10.167.179.6 – 10.167.179.7	10.167.179.7
5	10.167.179.8/31	10.167.179.8 – 10.167.179.9	10.167.179.9
6	10.167.179.10/31	10.167.179.10 – 10.167.179.11	10.167.179.11
7	10.167.179.12/31	10.167.179.12 – 10.167.179.13	10.167.179.13
8	10.167.179.14/31	10.167.179.14 – 10.167.179.15	10.167.179.15
9	10.167.179.16/31	10.167.179.16 – 10.167.179.17	10.167.179.17
10	10.167.179.18/31	10.167.179.18 – 10.167.179.19	10.167.179.19
11	10.167.179.20/31	10.167.179.20 – 10.167.179.21	10.167.179.21
12	10.167.179.22/31	10.167.179.22 – 10.167.179.23	10.167.179.23
13	10.167.179.24/31	10.167.179.24 – 10.167.179.25	10.167.179.25
14	10.167.179.26/31	10.167.179.26 – 10.167.179.27	10.167.179.27
15	10.167.179.28/31	10.167.179.28 – 10.167.179.29	10.167.179.29
16	10.167.179.30/31	10.167.179.30 – 10.167.179.31	10.167.179.31
17	10.167.179.32/31	10.167.179.32 – 10.167.179.33	10.167.179.33
18	10.167.179.34/31	10.167.179.34 – 10.167.179.35	10.167.179.35
19	10.167.179.36/31	10.167.179.36 – 10.167.179.37	10.167.179.37
20	10.167.179.38/31	10.167.179.38 – 10.167.179.39	10.167.179.39
21	10.167.179.40/31	10.167.179.40 – 10.167.179.41	10.167.179.41
22	10.167.179.42/31	10.167.179.42 – 10.167.179.43	10.167.179.43
23	10.167.179.44/31	10.167.179.44 – 10.167.179.45	10.167.179.45
24	10.167.179.46/31	10.167.179.46 – 10.167.179.47	10.167.179.47
25	10.167.179.48/31	10.167.179.48 – 10.167.179.49	10.167.179.49
26	10.167.179.50/31	10.167.179.50 – 10.167.179.51	10.167.179.51
27	10.167.179.52/31	10.167.179.52 – 10.167.179.53	10.167.179.53
28	10.167.179.54/31	10.167.179.54 – 10.167.179.55	10.167.179.55
29	10.167.179.56/31	10.167.179.56 – 10.167.179.57	10.167.179.57
30	10.167.179.58/31	10.167.179.58 – 10.167.179.59	10.167.179.59
31	10.167.179.60/31	10.167.179.60 – 10.167.179.61	10.167.179.61
32	10.167.179.62/31	10.167.179.62 – 10.167.179.63	10.167.179.63
33	10.167.179.64/31	10.167.179.64 – 10.167.179.65	10.167.179.65
34	10.167.179.66/31	10.167.179.66 – 10.167.179.67	10.167.179.67
35	10.167.179.68/31	10.167.179.68 – 10.167.179.69	10.167.179.69
36	10.167.179.70/31	10.167.179.70 – 10.167.179.71	10.167.179.71
37	10.167.179.72/31	10.167.179.72 – 10.167.179.73	10.167.179.73
38	10.167.179.74/31	10.167.179.74 – 10.167.179.75	10.167.179.75
39	10.167.179.76/31	10.167.179.76 – 10.167.179.77	10.167.179.77
40	10.167.179.78/31	10.167.179.78 – 10.167.179.79	10.167.179.79
41	10.167.179.80/31	10.167.179.80 – 10.167.179.81	10.167.179.81
42	10.167.179.82/31	10.167.179.82 – 10.167.179.83	10.167.179.83
43	10.167.179.84/31	10.167.179.84 – 10.167.179.85	10.167.179.85
44	10.167.179.86/31	10.167.179.86 – 10.167.179.87	10.167.179.87
45	10.167.179.88/31	10.167.179.88 – 10.167.179.89	10.167.179.89
46	10.167.179.90/31	10.167.179.90 – 10.167.179.91	10.167.179.91
47	10.167.179.92/31	10.167.179.92 – 10.167.179.93	10.167.179.93
48	10.167.179.94/31	10.167.179.94 – 10.167.179.95	10.167.179.95
49	10.167.179.96/31	10.167.179.96 – 10.167.179.97	10.167.179.97
50	10.167.179.98/31	10.167.179.98 – 10.167.179.99	10.167.179.99
51	10.167.179.100/31	10.167.179.100 – 10.167.179.101	10.167.179.101
52	10.167.179.102/31	10.167.179.102 – 10.167.179.103	10.167.179.103
53	10.167.179.104/31	10.167.179.104 – 10.167.179.105	10.167.179.105
54	10.167.179.106/31	10.167.179.106 – 10.167.179.107	10.167.179.107
55	10.167.179.108/31	10.167.179.108 – 10.167.179.109	10.167.179.109
56	10.167.179.110/31	10.167.179.110 – 10.167.179.111	10.167.179.111
57	10.167.179.112/31	10.167.179.112 – 10.167.179.113	10.167.179.113
58	10.167.179.114/31	10.167.179.114 – 10.167.179.115	10.167.179.115
59	10.167.179.116/31	10.167.179.116 – 10.167.179.117	10.167.179.117
60	10.167.179.118/31	10.167.179.118 – 10.167.179.119	10.167.179.119
61	10.167.179.120/31	10.167.179.120 – 10.167.179.121	10.167.179.121
62	10.167.179.122/31	10.167.179.122 – 10.167.179.123	10.167.179.123
63	10.167.179.124/31	10.167.179.124 – 10.167.179.125	10.167.179.125
64	10.167.179.126/31	10.167.179.126 – 10.167.179.127	10.167.179.127
65	10.167.179.128/31	10.167.179.128 – 10.167.179.129	10.167.179.129
66	10.167.179.130/31	10.167.179.130 – 10.167.179.131	10.167.179.131
67	10.167.179.132/31	10.167.179.132 – 10.167.179.133	10.167.179.133
68	10.167.179.134/31	10.167.179.134 – 10.167.179.135	10.167.179.135
69	10.167.179.136/31	10.167.179.136 – 10.167.179.137	10.167.179.137
70	10.167.179.138/31	10.167.179.138 – 10.167.179.139	10.167.179.139
71	10.167.179.140/31	10.167.179.140 – 10.167.179.141	10.167.179.141
72	10.167.179.142/31	10.167.179.142 – 10.167.179.143	10.167.179.143
73	10.167.179.144/31	10.167.179.144 – 10.167.179.145	10.167.179.145
74	10.167.179.146/31	10.167.179.146 – 10.167.179.147	10.167.179.147
75	10.167.179.148/31	10.167.179.148 – 10.167.179.149	10.167.179.149
76	10.167.179.150/31	10.167.179.150 – 10.167.179.151	10.167.179.151
77	10.167.179.152/31	10.167.179.152 – 10.167.179.153	10.167.179.153
78	10.167.179.154/31	10.167.179.154 – 10.167.179.155	10.167.179.155
79	10.167.179.156/31	10.167.179.156 – 10.167.179.157	10.167.179.157
80	10.167.179.158/31	10.167.179.158 – 10.167.179.159	10.167.179.159
81	10.167.179.160/31	10.167.179.160 – 10.167.179.161	10.167.179.161
82	10.167.179.162/31	10.167.179.162 – 10.167.179.163	10.167.179.163
83	10.167.179.164/31	10.167.179.164 – 10.167.179.165	10.167.179.165
84	10.167.179.166/31	10.167.179.166 – 10.167.179.167	10.167.179.167
85	10.167.179.168/31	10.167.179.168 – 10.167.179.169	10.167.179.169
86	10.167.179.170/31	10.167.179.170 – 10.167.179.171	10.167.179.171
87	10.167.179.172/31	10.167.179.172 – 10.167.179.173	10.167.179.173
88	10.167.179.174/31	10.167.179.174 – 10.167.179.175	10.167.179.175
89	10.167.179.176/31	10.167.179.176 – 10.167.179.177	10.167.179.177
90	10.167.179.178/31	10.167.179.178 – 10.167.179.179	10.167.179.179
91	10.167.179.180/31	10.167.179.180 – 10.167.179.181	10.167.179.181
92	10.167.179.182/31	10.167.179.182 – 10.167.179.183	10.167.179.183
93	10.167.179.184/31	10.167.179.184 – 10.167.179.185	10.167.179.185
94	10.167.179.186/31	10.167.179.186 – 10.167.179.187	10.167.179.187
95	10.167.179.188/31	10.167.179.188 – 10.167.179.189	10.167.179.189
96	10.167.179.190/31	10.167.179.190 – 10.167.179.191	10.167.179.191
97	10.167.179.192/31	10.167.179.192 – 10.167.179.193	10.167.179.193
98	10.167.179.194/31	10.167.179.194 – 10.167.179.195	10.167.179.195
99	10.167.179.196/31	10.167.179.196 – 10.167.179.197	10.167.179.197
100	10.167.179.198/31	10.167.179.198 – 10.167.179.199	10.167.179.199
101	10.167.179.200/31	10.167.179.200 – 10.167.179.201	10.167.179.201
102	10.167.179.202/31	10.167.179.202 – 10.167.179.203	10.167.179.203
103	10.167.179.204/31	10.167.179.204 – 10.167.179.205	10.167.179.205
104	10.167.179.206/31	10.167.179.206 – 10.167.179.207	10.167.179.207
105	10.167.179.208/31	10.167.179.208 – 10.167.179.209	10.167.179.209
106	10.167.179.210/31	10.167.179.210 – 10.167.179.211	10.167.179.211
107	10.167.179.212/31	10.167.179.212 – 10.167.179.213	10.167.179.213
108	10.167.179.214/31	10.167.179.214 – 10.167.179.215	10.167.179.215
109	10.167.179.216/31	10.167.179.216 – 10.167.179.217	10.167.179.217
110	10.167.179.218/31	10.167.179.218 – 10.167.179.219	10.167.179.219
111	10.167.179.220/31	10.167.179.220 – 10.167.179.221	10.167.179.221
112	10.167.179.222/31	10.167.179.222 – 10.167.179.223	10.167.179.223
113	10.167.179.224/31	10.167.179.224 – 10.167.179.225	10.167.179.225
114	10.167.179.226/31	10.167.179.226 – 10.167.179.227	10.167.179.227
115	10.167.179.228/31	10.167.179.228 – 10.167.179.229	10.167.179.229
116	10.167.179.230/31	10.167.179.230 – 10.167.179.231	10.167.179.231
117	10.167.179.232/31	10.167.179.232 – 10.167.179.233	10.167.179.233
118	10.167.179.234/31	10.167.179.234 – 10.167.179.235	10.167.179.235
119	10.167.179.236/31	10.167.179.236 – 10.167.179.237	10.167.179.237
120	10.167.179.238/31	10.167.179.238 – 10.167.179.239	10.167.179.239
121	10.167.179.240/31	10.167.179.240 – 10.167.179.241	10.167.179.241
122	10.167.179.242/31	10.167.179.242 – 10.167.179.243	10.167.179.243
123	10.167.179.244/31	10.167.179.244 – 10.167.179.245	10.167.179.245
124	10.167.179.246/31	10.167.179.246 – 10.167.179.247	10.167.179.247
125	10.167.179.248/31	10.167.179.248 – 10.167.179.249	10.167.179.249
126	10.167.179.250/31	10.167.179.250 – 10.167.179.251	10.167.179.251
127	10.167.179.252/31	10.167.179.252 – 10.167.179.253	10.167.179.253
128	10.167.179.254/31	10.167.179.254 – 10.167.179.255	10.167.179.255

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 →