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)10.2.214.0/23

network10.2.214.0/23

broadcast10.2.215.255

first host10.2.214.1

last host10.2.215.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.2.214.0/23

address00001010.00000010.11010110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000010.11010110.00000000

broadcast00001010.00000010.11010111.11111111

green = network part, grey = host part

hex0x0a02d600

decimal167958016

reverse dns0.214.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:d600

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.2.214.0/29	10.2.214.1 – 10.2.214.6	10.2.214.7
2	10.2.214.8/29	10.2.214.9 – 10.2.214.14	10.2.214.15
3	10.2.214.16/29	10.2.214.17 – 10.2.214.22	10.2.214.23
4	10.2.214.24/29	10.2.214.25 – 10.2.214.30	10.2.214.31
5	10.2.214.32/29	10.2.214.33 – 10.2.214.38	10.2.214.39
6	10.2.214.40/29	10.2.214.41 – 10.2.214.46	10.2.214.47
7	10.2.214.48/29	10.2.214.49 – 10.2.214.54	10.2.214.55
8	10.2.214.56/29	10.2.214.57 – 10.2.214.62	10.2.214.63
9	10.2.214.64/29	10.2.214.65 – 10.2.214.70	10.2.214.71
10	10.2.214.72/29	10.2.214.73 – 10.2.214.78	10.2.214.79
11	10.2.214.80/29	10.2.214.81 – 10.2.214.86	10.2.214.87
12	10.2.214.88/29	10.2.214.89 – 10.2.214.94	10.2.214.95
13	10.2.214.96/29	10.2.214.97 – 10.2.214.102	10.2.214.103
14	10.2.214.104/29	10.2.214.105 – 10.2.214.110	10.2.214.111
15	10.2.214.112/29	10.2.214.113 – 10.2.214.118	10.2.214.119
16	10.2.214.120/29	10.2.214.121 – 10.2.214.126	10.2.214.127
17	10.2.214.128/29	10.2.214.129 – 10.2.214.134	10.2.214.135
18	10.2.214.136/29	10.2.214.137 – 10.2.214.142	10.2.214.143
19	10.2.214.144/29	10.2.214.145 – 10.2.214.150	10.2.214.151
20	10.2.214.152/29	10.2.214.153 – 10.2.214.158	10.2.214.159
21	10.2.214.160/29	10.2.214.161 – 10.2.214.166	10.2.214.167
22	10.2.214.168/29	10.2.214.169 – 10.2.214.174	10.2.214.175
23	10.2.214.176/29	10.2.214.177 – 10.2.214.182	10.2.214.183
24	10.2.214.184/29	10.2.214.185 – 10.2.214.190	10.2.214.191
25	10.2.214.192/29	10.2.214.193 – 10.2.214.198	10.2.214.199
26	10.2.214.200/29	10.2.214.201 – 10.2.214.206	10.2.214.207
27	10.2.214.208/29	10.2.214.209 – 10.2.214.214	10.2.214.215
28	10.2.214.216/29	10.2.214.217 – 10.2.214.222	10.2.214.223
29	10.2.214.224/29	10.2.214.225 – 10.2.214.230	10.2.214.231
30	10.2.214.232/29	10.2.214.233 – 10.2.214.238	10.2.214.239
31	10.2.214.240/29	10.2.214.241 – 10.2.214.246	10.2.214.247
32	10.2.214.248/29	10.2.214.249 – 10.2.214.254	10.2.214.255
33	10.2.215.0/29	10.2.215.1 – 10.2.215.6	10.2.215.7
34	10.2.215.8/29	10.2.215.9 – 10.2.215.14	10.2.215.15
35	10.2.215.16/29	10.2.215.17 – 10.2.215.22	10.2.215.23
36	10.2.215.24/29	10.2.215.25 – 10.2.215.30	10.2.215.31
37	10.2.215.32/29	10.2.215.33 – 10.2.215.38	10.2.215.39
38	10.2.215.40/29	10.2.215.41 – 10.2.215.46	10.2.215.47
39	10.2.215.48/29	10.2.215.49 – 10.2.215.54	10.2.215.55
40	10.2.215.56/29	10.2.215.57 – 10.2.215.62	10.2.215.63
41	10.2.215.64/29	10.2.215.65 – 10.2.215.70	10.2.215.71
42	10.2.215.72/29	10.2.215.73 – 10.2.215.78	10.2.215.79
43	10.2.215.80/29	10.2.215.81 – 10.2.215.86	10.2.215.87
44	10.2.215.88/29	10.2.215.89 – 10.2.215.94	10.2.215.95
45	10.2.215.96/29	10.2.215.97 – 10.2.215.102	10.2.215.103
46	10.2.215.104/29	10.2.215.105 – 10.2.215.110	10.2.215.111
47	10.2.215.112/29	10.2.215.113 – 10.2.215.118	10.2.215.119
48	10.2.215.120/29	10.2.215.121 – 10.2.215.126	10.2.215.127
49	10.2.215.128/29	10.2.215.129 – 10.2.215.134	10.2.215.135
50	10.2.215.136/29	10.2.215.137 – 10.2.215.142	10.2.215.143
51	10.2.215.144/29	10.2.215.145 – 10.2.215.150	10.2.215.151
52	10.2.215.152/29	10.2.215.153 – 10.2.215.158	10.2.215.159
53	10.2.215.160/29	10.2.215.161 – 10.2.215.166	10.2.215.167
54	10.2.215.168/29	10.2.215.169 – 10.2.215.174	10.2.215.175
55	10.2.215.176/29	10.2.215.177 – 10.2.215.182	10.2.215.183
56	10.2.215.184/29	10.2.215.185 – 10.2.215.190	10.2.215.191
57	10.2.215.192/29	10.2.215.193 – 10.2.215.198	10.2.215.199
58	10.2.215.200/29	10.2.215.201 – 10.2.215.206	10.2.215.207
59	10.2.215.208/29	10.2.215.209 – 10.2.215.214	10.2.215.215
60	10.2.215.216/29	10.2.215.217 – 10.2.215.222	10.2.215.223
61	10.2.215.224/29	10.2.215.225 – 10.2.215.230	10.2.215.231
62	10.2.215.232/29	10.2.215.233 – 10.2.215.238	10.2.215.239
63	10.2.215.240/29	10.2.215.241 – 10.2.215.246	10.2.215.247
64	10.2.215.248/29	10.2.215.249 – 10.2.215.254	10.2.215.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →