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)10.167.127.0/24

network10.167.127.0/24

broadcast10.167.127.255

first host10.167.127.1

last host10.167.127.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.167.127.0/24

address00001010.10100111.01111111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10100111.01111111.00000000

broadcast00001010.10100111.01111111.11111111

green = network part, grey = host part

hex0x0aa77f00

decimal178749184

reverse dns0.127.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7f00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.127.0/31	10.167.127.0 – 10.167.127.1	10.167.127.1
2	10.167.127.2/31	10.167.127.2 – 10.167.127.3	10.167.127.3
3	10.167.127.4/31	10.167.127.4 – 10.167.127.5	10.167.127.5
4	10.167.127.6/31	10.167.127.6 – 10.167.127.7	10.167.127.7
5	10.167.127.8/31	10.167.127.8 – 10.167.127.9	10.167.127.9
6	10.167.127.10/31	10.167.127.10 – 10.167.127.11	10.167.127.11
7	10.167.127.12/31	10.167.127.12 – 10.167.127.13	10.167.127.13
8	10.167.127.14/31	10.167.127.14 – 10.167.127.15	10.167.127.15
9	10.167.127.16/31	10.167.127.16 – 10.167.127.17	10.167.127.17
10	10.167.127.18/31	10.167.127.18 – 10.167.127.19	10.167.127.19
11	10.167.127.20/31	10.167.127.20 – 10.167.127.21	10.167.127.21
12	10.167.127.22/31	10.167.127.22 – 10.167.127.23	10.167.127.23
13	10.167.127.24/31	10.167.127.24 – 10.167.127.25	10.167.127.25
14	10.167.127.26/31	10.167.127.26 – 10.167.127.27	10.167.127.27
15	10.167.127.28/31	10.167.127.28 – 10.167.127.29	10.167.127.29
16	10.167.127.30/31	10.167.127.30 – 10.167.127.31	10.167.127.31
17	10.167.127.32/31	10.167.127.32 – 10.167.127.33	10.167.127.33
18	10.167.127.34/31	10.167.127.34 – 10.167.127.35	10.167.127.35
19	10.167.127.36/31	10.167.127.36 – 10.167.127.37	10.167.127.37
20	10.167.127.38/31	10.167.127.38 – 10.167.127.39	10.167.127.39
21	10.167.127.40/31	10.167.127.40 – 10.167.127.41	10.167.127.41
22	10.167.127.42/31	10.167.127.42 – 10.167.127.43	10.167.127.43
23	10.167.127.44/31	10.167.127.44 – 10.167.127.45	10.167.127.45
24	10.167.127.46/31	10.167.127.46 – 10.167.127.47	10.167.127.47
25	10.167.127.48/31	10.167.127.48 – 10.167.127.49	10.167.127.49
26	10.167.127.50/31	10.167.127.50 – 10.167.127.51	10.167.127.51
27	10.167.127.52/31	10.167.127.52 – 10.167.127.53	10.167.127.53
28	10.167.127.54/31	10.167.127.54 – 10.167.127.55	10.167.127.55
29	10.167.127.56/31	10.167.127.56 – 10.167.127.57	10.167.127.57
30	10.167.127.58/31	10.167.127.58 – 10.167.127.59	10.167.127.59
31	10.167.127.60/31	10.167.127.60 – 10.167.127.61	10.167.127.61
32	10.167.127.62/31	10.167.127.62 – 10.167.127.63	10.167.127.63
33	10.167.127.64/31	10.167.127.64 – 10.167.127.65	10.167.127.65
34	10.167.127.66/31	10.167.127.66 – 10.167.127.67	10.167.127.67
35	10.167.127.68/31	10.167.127.68 – 10.167.127.69	10.167.127.69
36	10.167.127.70/31	10.167.127.70 – 10.167.127.71	10.167.127.71
37	10.167.127.72/31	10.167.127.72 – 10.167.127.73	10.167.127.73
38	10.167.127.74/31	10.167.127.74 – 10.167.127.75	10.167.127.75
39	10.167.127.76/31	10.167.127.76 – 10.167.127.77	10.167.127.77
40	10.167.127.78/31	10.167.127.78 – 10.167.127.79	10.167.127.79
41	10.167.127.80/31	10.167.127.80 – 10.167.127.81	10.167.127.81
42	10.167.127.82/31	10.167.127.82 – 10.167.127.83	10.167.127.83
43	10.167.127.84/31	10.167.127.84 – 10.167.127.85	10.167.127.85
44	10.167.127.86/31	10.167.127.86 – 10.167.127.87	10.167.127.87
45	10.167.127.88/31	10.167.127.88 – 10.167.127.89	10.167.127.89
46	10.167.127.90/31	10.167.127.90 – 10.167.127.91	10.167.127.91
47	10.167.127.92/31	10.167.127.92 – 10.167.127.93	10.167.127.93
48	10.167.127.94/31	10.167.127.94 – 10.167.127.95	10.167.127.95
49	10.167.127.96/31	10.167.127.96 – 10.167.127.97	10.167.127.97
50	10.167.127.98/31	10.167.127.98 – 10.167.127.99	10.167.127.99
51	10.167.127.100/31	10.167.127.100 – 10.167.127.101	10.167.127.101
52	10.167.127.102/31	10.167.127.102 – 10.167.127.103	10.167.127.103
53	10.167.127.104/31	10.167.127.104 – 10.167.127.105	10.167.127.105
54	10.167.127.106/31	10.167.127.106 – 10.167.127.107	10.167.127.107
55	10.167.127.108/31	10.167.127.108 – 10.167.127.109	10.167.127.109
56	10.167.127.110/31	10.167.127.110 – 10.167.127.111	10.167.127.111
57	10.167.127.112/31	10.167.127.112 – 10.167.127.113	10.167.127.113
58	10.167.127.114/31	10.167.127.114 – 10.167.127.115	10.167.127.115
59	10.167.127.116/31	10.167.127.116 – 10.167.127.117	10.167.127.117
60	10.167.127.118/31	10.167.127.118 – 10.167.127.119	10.167.127.119
61	10.167.127.120/31	10.167.127.120 – 10.167.127.121	10.167.127.121
62	10.167.127.122/31	10.167.127.122 – 10.167.127.123	10.167.127.123
63	10.167.127.124/31	10.167.127.124 – 10.167.127.125	10.167.127.125
64	10.167.127.126/31	10.167.127.126 – 10.167.127.127	10.167.127.127
65	10.167.127.128/31	10.167.127.128 – 10.167.127.129	10.167.127.129
66	10.167.127.130/31	10.167.127.130 – 10.167.127.131	10.167.127.131
67	10.167.127.132/31	10.167.127.132 – 10.167.127.133	10.167.127.133
68	10.167.127.134/31	10.167.127.134 – 10.167.127.135	10.167.127.135
69	10.167.127.136/31	10.167.127.136 – 10.167.127.137	10.167.127.137
70	10.167.127.138/31	10.167.127.138 – 10.167.127.139	10.167.127.139
71	10.167.127.140/31	10.167.127.140 – 10.167.127.141	10.167.127.141
72	10.167.127.142/31	10.167.127.142 – 10.167.127.143	10.167.127.143
73	10.167.127.144/31	10.167.127.144 – 10.167.127.145	10.167.127.145
74	10.167.127.146/31	10.167.127.146 – 10.167.127.147	10.167.127.147
75	10.167.127.148/31	10.167.127.148 – 10.167.127.149	10.167.127.149
76	10.167.127.150/31	10.167.127.150 – 10.167.127.151	10.167.127.151
77	10.167.127.152/31	10.167.127.152 – 10.167.127.153	10.167.127.153
78	10.167.127.154/31	10.167.127.154 – 10.167.127.155	10.167.127.155
79	10.167.127.156/31	10.167.127.156 – 10.167.127.157	10.167.127.157
80	10.167.127.158/31	10.167.127.158 – 10.167.127.159	10.167.127.159
81	10.167.127.160/31	10.167.127.160 – 10.167.127.161	10.167.127.161
82	10.167.127.162/31	10.167.127.162 – 10.167.127.163	10.167.127.163
83	10.167.127.164/31	10.167.127.164 – 10.167.127.165	10.167.127.165
84	10.167.127.166/31	10.167.127.166 – 10.167.127.167	10.167.127.167
85	10.167.127.168/31	10.167.127.168 – 10.167.127.169	10.167.127.169
86	10.167.127.170/31	10.167.127.170 – 10.167.127.171	10.167.127.171
87	10.167.127.172/31	10.167.127.172 – 10.167.127.173	10.167.127.173
88	10.167.127.174/31	10.167.127.174 – 10.167.127.175	10.167.127.175
89	10.167.127.176/31	10.167.127.176 – 10.167.127.177	10.167.127.177
90	10.167.127.178/31	10.167.127.178 – 10.167.127.179	10.167.127.179
91	10.167.127.180/31	10.167.127.180 – 10.167.127.181	10.167.127.181
92	10.167.127.182/31	10.167.127.182 – 10.167.127.183	10.167.127.183
93	10.167.127.184/31	10.167.127.184 – 10.167.127.185	10.167.127.185
94	10.167.127.186/31	10.167.127.186 – 10.167.127.187	10.167.127.187
95	10.167.127.188/31	10.167.127.188 – 10.167.127.189	10.167.127.189
96	10.167.127.190/31	10.167.127.190 – 10.167.127.191	10.167.127.191
97	10.167.127.192/31	10.167.127.192 – 10.167.127.193	10.167.127.193
98	10.167.127.194/31	10.167.127.194 – 10.167.127.195	10.167.127.195
99	10.167.127.196/31	10.167.127.196 – 10.167.127.197	10.167.127.197
100	10.167.127.198/31	10.167.127.198 – 10.167.127.199	10.167.127.199
101	10.167.127.200/31	10.167.127.200 – 10.167.127.201	10.167.127.201
102	10.167.127.202/31	10.167.127.202 – 10.167.127.203	10.167.127.203
103	10.167.127.204/31	10.167.127.204 – 10.167.127.205	10.167.127.205
104	10.167.127.206/31	10.167.127.206 – 10.167.127.207	10.167.127.207
105	10.167.127.208/31	10.167.127.208 – 10.167.127.209	10.167.127.209
106	10.167.127.210/31	10.167.127.210 – 10.167.127.211	10.167.127.211
107	10.167.127.212/31	10.167.127.212 – 10.167.127.213	10.167.127.213
108	10.167.127.214/31	10.167.127.214 – 10.167.127.215	10.167.127.215
109	10.167.127.216/31	10.167.127.216 – 10.167.127.217	10.167.127.217
110	10.167.127.218/31	10.167.127.218 – 10.167.127.219	10.167.127.219
111	10.167.127.220/31	10.167.127.220 – 10.167.127.221	10.167.127.221
112	10.167.127.222/31	10.167.127.222 – 10.167.127.223	10.167.127.223
113	10.167.127.224/31	10.167.127.224 – 10.167.127.225	10.167.127.225
114	10.167.127.226/31	10.167.127.226 – 10.167.127.227	10.167.127.227
115	10.167.127.228/31	10.167.127.228 – 10.167.127.229	10.167.127.229
116	10.167.127.230/31	10.167.127.230 – 10.167.127.231	10.167.127.231
117	10.167.127.232/31	10.167.127.232 – 10.167.127.233	10.167.127.233
118	10.167.127.234/31	10.167.127.234 – 10.167.127.235	10.167.127.235
119	10.167.127.236/31	10.167.127.236 – 10.167.127.237	10.167.127.237
120	10.167.127.238/31	10.167.127.238 – 10.167.127.239	10.167.127.239
121	10.167.127.240/31	10.167.127.240 – 10.167.127.241	10.167.127.241
122	10.167.127.242/31	10.167.127.242 – 10.167.127.243	10.167.127.243
123	10.167.127.244/31	10.167.127.244 – 10.167.127.245	10.167.127.245
124	10.167.127.246/31	10.167.127.246 – 10.167.127.247	10.167.127.247
125	10.167.127.248/31	10.167.127.248 – 10.167.127.249	10.167.127.249
126	10.167.127.250/31	10.167.127.250 – 10.167.127.251	10.167.127.251
127	10.167.127.252/31	10.167.127.252 – 10.167.127.253	10.167.127.253
128	10.167.127.254/31	10.167.127.254 – 10.167.127.255	10.167.127.255

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 →