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)10.0.126.0/24

network10.0.126.0/24

broadcast10.0.126.255

first host10.0.126.1

last host10.0.126.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.126.0/24

address00001010.00000000.01111110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.01111110.00000000

broadcast00001010.00000000.01111110.11111111

green = network part, grey = host part

hex0x0a007e00

decimal167804416

reverse dns0.126.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:7e00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.126.0/31	10.0.126.0 – 10.0.126.1	10.0.126.1
2	10.0.126.2/31	10.0.126.2 – 10.0.126.3	10.0.126.3
3	10.0.126.4/31	10.0.126.4 – 10.0.126.5	10.0.126.5
4	10.0.126.6/31	10.0.126.6 – 10.0.126.7	10.0.126.7
5	10.0.126.8/31	10.0.126.8 – 10.0.126.9	10.0.126.9
6	10.0.126.10/31	10.0.126.10 – 10.0.126.11	10.0.126.11
7	10.0.126.12/31	10.0.126.12 – 10.0.126.13	10.0.126.13
8	10.0.126.14/31	10.0.126.14 – 10.0.126.15	10.0.126.15
9	10.0.126.16/31	10.0.126.16 – 10.0.126.17	10.0.126.17
10	10.0.126.18/31	10.0.126.18 – 10.0.126.19	10.0.126.19
11	10.0.126.20/31	10.0.126.20 – 10.0.126.21	10.0.126.21
12	10.0.126.22/31	10.0.126.22 – 10.0.126.23	10.0.126.23
13	10.0.126.24/31	10.0.126.24 – 10.0.126.25	10.0.126.25
14	10.0.126.26/31	10.0.126.26 – 10.0.126.27	10.0.126.27
15	10.0.126.28/31	10.0.126.28 – 10.0.126.29	10.0.126.29
16	10.0.126.30/31	10.0.126.30 – 10.0.126.31	10.0.126.31
17	10.0.126.32/31	10.0.126.32 – 10.0.126.33	10.0.126.33
18	10.0.126.34/31	10.0.126.34 – 10.0.126.35	10.0.126.35
19	10.0.126.36/31	10.0.126.36 – 10.0.126.37	10.0.126.37
20	10.0.126.38/31	10.0.126.38 – 10.0.126.39	10.0.126.39
21	10.0.126.40/31	10.0.126.40 – 10.0.126.41	10.0.126.41
22	10.0.126.42/31	10.0.126.42 – 10.0.126.43	10.0.126.43
23	10.0.126.44/31	10.0.126.44 – 10.0.126.45	10.0.126.45
24	10.0.126.46/31	10.0.126.46 – 10.0.126.47	10.0.126.47
25	10.0.126.48/31	10.0.126.48 – 10.0.126.49	10.0.126.49
26	10.0.126.50/31	10.0.126.50 – 10.0.126.51	10.0.126.51
27	10.0.126.52/31	10.0.126.52 – 10.0.126.53	10.0.126.53
28	10.0.126.54/31	10.0.126.54 – 10.0.126.55	10.0.126.55
29	10.0.126.56/31	10.0.126.56 – 10.0.126.57	10.0.126.57
30	10.0.126.58/31	10.0.126.58 – 10.0.126.59	10.0.126.59
31	10.0.126.60/31	10.0.126.60 – 10.0.126.61	10.0.126.61
32	10.0.126.62/31	10.0.126.62 – 10.0.126.63	10.0.126.63
33	10.0.126.64/31	10.0.126.64 – 10.0.126.65	10.0.126.65
34	10.0.126.66/31	10.0.126.66 – 10.0.126.67	10.0.126.67
35	10.0.126.68/31	10.0.126.68 – 10.0.126.69	10.0.126.69
36	10.0.126.70/31	10.0.126.70 – 10.0.126.71	10.0.126.71
37	10.0.126.72/31	10.0.126.72 – 10.0.126.73	10.0.126.73
38	10.0.126.74/31	10.0.126.74 – 10.0.126.75	10.0.126.75
39	10.0.126.76/31	10.0.126.76 – 10.0.126.77	10.0.126.77
40	10.0.126.78/31	10.0.126.78 – 10.0.126.79	10.0.126.79
41	10.0.126.80/31	10.0.126.80 – 10.0.126.81	10.0.126.81
42	10.0.126.82/31	10.0.126.82 – 10.0.126.83	10.0.126.83
43	10.0.126.84/31	10.0.126.84 – 10.0.126.85	10.0.126.85
44	10.0.126.86/31	10.0.126.86 – 10.0.126.87	10.0.126.87
45	10.0.126.88/31	10.0.126.88 – 10.0.126.89	10.0.126.89
46	10.0.126.90/31	10.0.126.90 – 10.0.126.91	10.0.126.91
47	10.0.126.92/31	10.0.126.92 – 10.0.126.93	10.0.126.93
48	10.0.126.94/31	10.0.126.94 – 10.0.126.95	10.0.126.95
49	10.0.126.96/31	10.0.126.96 – 10.0.126.97	10.0.126.97
50	10.0.126.98/31	10.0.126.98 – 10.0.126.99	10.0.126.99
51	10.0.126.100/31	10.0.126.100 – 10.0.126.101	10.0.126.101
52	10.0.126.102/31	10.0.126.102 – 10.0.126.103	10.0.126.103
53	10.0.126.104/31	10.0.126.104 – 10.0.126.105	10.0.126.105
54	10.0.126.106/31	10.0.126.106 – 10.0.126.107	10.0.126.107
55	10.0.126.108/31	10.0.126.108 – 10.0.126.109	10.0.126.109
56	10.0.126.110/31	10.0.126.110 – 10.0.126.111	10.0.126.111
57	10.0.126.112/31	10.0.126.112 – 10.0.126.113	10.0.126.113
58	10.0.126.114/31	10.0.126.114 – 10.0.126.115	10.0.126.115
59	10.0.126.116/31	10.0.126.116 – 10.0.126.117	10.0.126.117
60	10.0.126.118/31	10.0.126.118 – 10.0.126.119	10.0.126.119
61	10.0.126.120/31	10.0.126.120 – 10.0.126.121	10.0.126.121
62	10.0.126.122/31	10.0.126.122 – 10.0.126.123	10.0.126.123
63	10.0.126.124/31	10.0.126.124 – 10.0.126.125	10.0.126.125
64	10.0.126.126/31	10.0.126.126 – 10.0.126.127	10.0.126.127
65	10.0.126.128/31	10.0.126.128 – 10.0.126.129	10.0.126.129
66	10.0.126.130/31	10.0.126.130 – 10.0.126.131	10.0.126.131
67	10.0.126.132/31	10.0.126.132 – 10.0.126.133	10.0.126.133
68	10.0.126.134/31	10.0.126.134 – 10.0.126.135	10.0.126.135
69	10.0.126.136/31	10.0.126.136 – 10.0.126.137	10.0.126.137
70	10.0.126.138/31	10.0.126.138 – 10.0.126.139	10.0.126.139
71	10.0.126.140/31	10.0.126.140 – 10.0.126.141	10.0.126.141
72	10.0.126.142/31	10.0.126.142 – 10.0.126.143	10.0.126.143
73	10.0.126.144/31	10.0.126.144 – 10.0.126.145	10.0.126.145
74	10.0.126.146/31	10.0.126.146 – 10.0.126.147	10.0.126.147
75	10.0.126.148/31	10.0.126.148 – 10.0.126.149	10.0.126.149
76	10.0.126.150/31	10.0.126.150 – 10.0.126.151	10.0.126.151
77	10.0.126.152/31	10.0.126.152 – 10.0.126.153	10.0.126.153
78	10.0.126.154/31	10.0.126.154 – 10.0.126.155	10.0.126.155
79	10.0.126.156/31	10.0.126.156 – 10.0.126.157	10.0.126.157
80	10.0.126.158/31	10.0.126.158 – 10.0.126.159	10.0.126.159
81	10.0.126.160/31	10.0.126.160 – 10.0.126.161	10.0.126.161
82	10.0.126.162/31	10.0.126.162 – 10.0.126.163	10.0.126.163
83	10.0.126.164/31	10.0.126.164 – 10.0.126.165	10.0.126.165
84	10.0.126.166/31	10.0.126.166 – 10.0.126.167	10.0.126.167
85	10.0.126.168/31	10.0.126.168 – 10.0.126.169	10.0.126.169
86	10.0.126.170/31	10.0.126.170 – 10.0.126.171	10.0.126.171
87	10.0.126.172/31	10.0.126.172 – 10.0.126.173	10.0.126.173
88	10.0.126.174/31	10.0.126.174 – 10.0.126.175	10.0.126.175
89	10.0.126.176/31	10.0.126.176 – 10.0.126.177	10.0.126.177
90	10.0.126.178/31	10.0.126.178 – 10.0.126.179	10.0.126.179
91	10.0.126.180/31	10.0.126.180 – 10.0.126.181	10.0.126.181
92	10.0.126.182/31	10.0.126.182 – 10.0.126.183	10.0.126.183
93	10.0.126.184/31	10.0.126.184 – 10.0.126.185	10.0.126.185
94	10.0.126.186/31	10.0.126.186 – 10.0.126.187	10.0.126.187
95	10.0.126.188/31	10.0.126.188 – 10.0.126.189	10.0.126.189
96	10.0.126.190/31	10.0.126.190 – 10.0.126.191	10.0.126.191
97	10.0.126.192/31	10.0.126.192 – 10.0.126.193	10.0.126.193
98	10.0.126.194/31	10.0.126.194 – 10.0.126.195	10.0.126.195
99	10.0.126.196/31	10.0.126.196 – 10.0.126.197	10.0.126.197
100	10.0.126.198/31	10.0.126.198 – 10.0.126.199	10.0.126.199
101	10.0.126.200/31	10.0.126.200 – 10.0.126.201	10.0.126.201
102	10.0.126.202/31	10.0.126.202 – 10.0.126.203	10.0.126.203
103	10.0.126.204/31	10.0.126.204 – 10.0.126.205	10.0.126.205
104	10.0.126.206/31	10.0.126.206 – 10.0.126.207	10.0.126.207
105	10.0.126.208/31	10.0.126.208 – 10.0.126.209	10.0.126.209
106	10.0.126.210/31	10.0.126.210 – 10.0.126.211	10.0.126.211
107	10.0.126.212/31	10.0.126.212 – 10.0.126.213	10.0.126.213
108	10.0.126.214/31	10.0.126.214 – 10.0.126.215	10.0.126.215
109	10.0.126.216/31	10.0.126.216 – 10.0.126.217	10.0.126.217
110	10.0.126.218/31	10.0.126.218 – 10.0.126.219	10.0.126.219
111	10.0.126.220/31	10.0.126.220 – 10.0.126.221	10.0.126.221
112	10.0.126.222/31	10.0.126.222 – 10.0.126.223	10.0.126.223
113	10.0.126.224/31	10.0.126.224 – 10.0.126.225	10.0.126.225
114	10.0.126.226/31	10.0.126.226 – 10.0.126.227	10.0.126.227
115	10.0.126.228/31	10.0.126.228 – 10.0.126.229	10.0.126.229
116	10.0.126.230/31	10.0.126.230 – 10.0.126.231	10.0.126.231
117	10.0.126.232/31	10.0.126.232 – 10.0.126.233	10.0.126.233
118	10.0.126.234/31	10.0.126.234 – 10.0.126.235	10.0.126.235
119	10.0.126.236/31	10.0.126.236 – 10.0.126.237	10.0.126.237
120	10.0.126.238/31	10.0.126.238 – 10.0.126.239	10.0.126.239
121	10.0.126.240/31	10.0.126.240 – 10.0.126.241	10.0.126.241
122	10.0.126.242/31	10.0.126.242 – 10.0.126.243	10.0.126.243
123	10.0.126.244/31	10.0.126.244 – 10.0.126.245	10.0.126.245
124	10.0.126.246/31	10.0.126.246 – 10.0.126.247	10.0.126.247
125	10.0.126.248/31	10.0.126.248 – 10.0.126.249	10.0.126.249
126	10.0.126.250/31	10.0.126.250 – 10.0.126.251	10.0.126.251
127	10.0.126.252/31	10.0.126.252 – 10.0.126.253	10.0.126.253
128	10.0.126.254/31	10.0.126.254 – 10.0.126.255	10.0.126.255

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 →