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)10.131.93.0/24

network10.131.93.0/24

broadcast10.131.93.255

first host10.131.93.1

last host10.131.93.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.131.93.0/24

address00001010.10000011.01011101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.10000011.01011101.00000000

broadcast00001010.10000011.01011101.11111111

green = network part, grey = host part

hex0x0a835d00

decimal176381184

reverse dns0.93.131.10.in-addr.arpa

ipv4-mapped::ffff:a83:5d00

/24 split into /30 · 64 subnets

close ×

#	network	host range	broadcast
1	10.131.93.0/30	10.131.93.1 – 10.131.93.2	10.131.93.3
2	10.131.93.4/30	10.131.93.5 – 10.131.93.6	10.131.93.7
3	10.131.93.8/30	10.131.93.9 – 10.131.93.10	10.131.93.11
4	10.131.93.12/30	10.131.93.13 – 10.131.93.14	10.131.93.15
5	10.131.93.16/30	10.131.93.17 – 10.131.93.18	10.131.93.19
6	10.131.93.20/30	10.131.93.21 – 10.131.93.22	10.131.93.23
7	10.131.93.24/30	10.131.93.25 – 10.131.93.26	10.131.93.27
8	10.131.93.28/30	10.131.93.29 – 10.131.93.30	10.131.93.31
9	10.131.93.32/30	10.131.93.33 – 10.131.93.34	10.131.93.35
10	10.131.93.36/30	10.131.93.37 – 10.131.93.38	10.131.93.39
11	10.131.93.40/30	10.131.93.41 – 10.131.93.42	10.131.93.43
12	10.131.93.44/30	10.131.93.45 – 10.131.93.46	10.131.93.47
13	10.131.93.48/30	10.131.93.49 – 10.131.93.50	10.131.93.51
14	10.131.93.52/30	10.131.93.53 – 10.131.93.54	10.131.93.55
15	10.131.93.56/30	10.131.93.57 – 10.131.93.58	10.131.93.59
16	10.131.93.60/30	10.131.93.61 – 10.131.93.62	10.131.93.63
17	10.131.93.64/30	10.131.93.65 – 10.131.93.66	10.131.93.67
18	10.131.93.68/30	10.131.93.69 – 10.131.93.70	10.131.93.71
19	10.131.93.72/30	10.131.93.73 – 10.131.93.74	10.131.93.75
20	10.131.93.76/30	10.131.93.77 – 10.131.93.78	10.131.93.79
21	10.131.93.80/30	10.131.93.81 – 10.131.93.82	10.131.93.83
22	10.131.93.84/30	10.131.93.85 – 10.131.93.86	10.131.93.87
23	10.131.93.88/30	10.131.93.89 – 10.131.93.90	10.131.93.91
24	10.131.93.92/30	10.131.93.93 – 10.131.93.94	10.131.93.95
25	10.131.93.96/30	10.131.93.97 – 10.131.93.98	10.131.93.99
26	10.131.93.100/30	10.131.93.101 – 10.131.93.102	10.131.93.103
27	10.131.93.104/30	10.131.93.105 – 10.131.93.106	10.131.93.107
28	10.131.93.108/30	10.131.93.109 – 10.131.93.110	10.131.93.111
29	10.131.93.112/30	10.131.93.113 – 10.131.93.114	10.131.93.115
30	10.131.93.116/30	10.131.93.117 – 10.131.93.118	10.131.93.119
31	10.131.93.120/30	10.131.93.121 – 10.131.93.122	10.131.93.123
32	10.131.93.124/30	10.131.93.125 – 10.131.93.126	10.131.93.127
33	10.131.93.128/30	10.131.93.129 – 10.131.93.130	10.131.93.131
34	10.131.93.132/30	10.131.93.133 – 10.131.93.134	10.131.93.135
35	10.131.93.136/30	10.131.93.137 – 10.131.93.138	10.131.93.139
36	10.131.93.140/30	10.131.93.141 – 10.131.93.142	10.131.93.143
37	10.131.93.144/30	10.131.93.145 – 10.131.93.146	10.131.93.147
38	10.131.93.148/30	10.131.93.149 – 10.131.93.150	10.131.93.151
39	10.131.93.152/30	10.131.93.153 – 10.131.93.154	10.131.93.155
40	10.131.93.156/30	10.131.93.157 – 10.131.93.158	10.131.93.159
41	10.131.93.160/30	10.131.93.161 – 10.131.93.162	10.131.93.163
42	10.131.93.164/30	10.131.93.165 – 10.131.93.166	10.131.93.167
43	10.131.93.168/30	10.131.93.169 – 10.131.93.170	10.131.93.171
44	10.131.93.172/30	10.131.93.173 – 10.131.93.174	10.131.93.175
45	10.131.93.176/30	10.131.93.177 – 10.131.93.178	10.131.93.179
46	10.131.93.180/30	10.131.93.181 – 10.131.93.182	10.131.93.183
47	10.131.93.184/30	10.131.93.185 – 10.131.93.186	10.131.93.187
48	10.131.93.188/30	10.131.93.189 – 10.131.93.190	10.131.93.191
49	10.131.93.192/30	10.131.93.193 – 10.131.93.194	10.131.93.195
50	10.131.93.196/30	10.131.93.197 – 10.131.93.198	10.131.93.199
51	10.131.93.200/30	10.131.93.201 – 10.131.93.202	10.131.93.203
52	10.131.93.204/30	10.131.93.205 – 10.131.93.206	10.131.93.207
53	10.131.93.208/30	10.131.93.209 – 10.131.93.210	10.131.93.211
54	10.131.93.212/30	10.131.93.213 – 10.131.93.214	10.131.93.215
55	10.131.93.216/30	10.131.93.217 – 10.131.93.218	10.131.93.219
56	10.131.93.220/30	10.131.93.221 – 10.131.93.222	10.131.93.223
57	10.131.93.224/30	10.131.93.225 – 10.131.93.226	10.131.93.227
58	10.131.93.228/30	10.131.93.229 – 10.131.93.230	10.131.93.231
59	10.131.93.232/30	10.131.93.233 – 10.131.93.234	10.131.93.235
60	10.131.93.236/30	10.131.93.237 – 10.131.93.238	10.131.93.239
61	10.131.93.240/30	10.131.93.241 – 10.131.93.242	10.131.93.243
62	10.131.93.244/30	10.131.93.245 – 10.131.93.246	10.131.93.247
63	10.131.93.248/30	10.131.93.249 – 10.131.93.250	10.131.93.251
64	10.131.93.252/30	10.131.93.253 – 10.131.93.254	10.131.93.255

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 →