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)10.167.108.0/23

network10.167.108.0/23

broadcast10.167.109.255

first host10.167.108.1

last host10.167.109.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.108.0/23

address00001010.10100111.01101100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.01101100.00000000

broadcast00001010.10100111.01101101.11111111

green = network part, grey = host part

hex0x0aa76c00

decimal178744320

reverse dns0.108.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:6c00

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.108.0/29	10.167.108.1 – 10.167.108.6	10.167.108.7
2	10.167.108.8/29	10.167.108.9 – 10.167.108.14	10.167.108.15
3	10.167.108.16/29	10.167.108.17 – 10.167.108.22	10.167.108.23
4	10.167.108.24/29	10.167.108.25 – 10.167.108.30	10.167.108.31
5	10.167.108.32/29	10.167.108.33 – 10.167.108.38	10.167.108.39
6	10.167.108.40/29	10.167.108.41 – 10.167.108.46	10.167.108.47
7	10.167.108.48/29	10.167.108.49 – 10.167.108.54	10.167.108.55
8	10.167.108.56/29	10.167.108.57 – 10.167.108.62	10.167.108.63
9	10.167.108.64/29	10.167.108.65 – 10.167.108.70	10.167.108.71
10	10.167.108.72/29	10.167.108.73 – 10.167.108.78	10.167.108.79
11	10.167.108.80/29	10.167.108.81 – 10.167.108.86	10.167.108.87
12	10.167.108.88/29	10.167.108.89 – 10.167.108.94	10.167.108.95
13	10.167.108.96/29	10.167.108.97 – 10.167.108.102	10.167.108.103
14	10.167.108.104/29	10.167.108.105 – 10.167.108.110	10.167.108.111
15	10.167.108.112/29	10.167.108.113 – 10.167.108.118	10.167.108.119
16	10.167.108.120/29	10.167.108.121 – 10.167.108.126	10.167.108.127
17	10.167.108.128/29	10.167.108.129 – 10.167.108.134	10.167.108.135
18	10.167.108.136/29	10.167.108.137 – 10.167.108.142	10.167.108.143
19	10.167.108.144/29	10.167.108.145 – 10.167.108.150	10.167.108.151
20	10.167.108.152/29	10.167.108.153 – 10.167.108.158	10.167.108.159
21	10.167.108.160/29	10.167.108.161 – 10.167.108.166	10.167.108.167
22	10.167.108.168/29	10.167.108.169 – 10.167.108.174	10.167.108.175
23	10.167.108.176/29	10.167.108.177 – 10.167.108.182	10.167.108.183
24	10.167.108.184/29	10.167.108.185 – 10.167.108.190	10.167.108.191
25	10.167.108.192/29	10.167.108.193 – 10.167.108.198	10.167.108.199
26	10.167.108.200/29	10.167.108.201 – 10.167.108.206	10.167.108.207
27	10.167.108.208/29	10.167.108.209 – 10.167.108.214	10.167.108.215
28	10.167.108.216/29	10.167.108.217 – 10.167.108.222	10.167.108.223
29	10.167.108.224/29	10.167.108.225 – 10.167.108.230	10.167.108.231
30	10.167.108.232/29	10.167.108.233 – 10.167.108.238	10.167.108.239
31	10.167.108.240/29	10.167.108.241 – 10.167.108.246	10.167.108.247
32	10.167.108.248/29	10.167.108.249 – 10.167.108.254	10.167.108.255
33	10.167.109.0/29	10.167.109.1 – 10.167.109.6	10.167.109.7
34	10.167.109.8/29	10.167.109.9 – 10.167.109.14	10.167.109.15
35	10.167.109.16/29	10.167.109.17 – 10.167.109.22	10.167.109.23
36	10.167.109.24/29	10.167.109.25 – 10.167.109.30	10.167.109.31
37	10.167.109.32/29	10.167.109.33 – 10.167.109.38	10.167.109.39
38	10.167.109.40/29	10.167.109.41 – 10.167.109.46	10.167.109.47
39	10.167.109.48/29	10.167.109.49 – 10.167.109.54	10.167.109.55
40	10.167.109.56/29	10.167.109.57 – 10.167.109.62	10.167.109.63
41	10.167.109.64/29	10.167.109.65 – 10.167.109.70	10.167.109.71
42	10.167.109.72/29	10.167.109.73 – 10.167.109.78	10.167.109.79
43	10.167.109.80/29	10.167.109.81 – 10.167.109.86	10.167.109.87
44	10.167.109.88/29	10.167.109.89 – 10.167.109.94	10.167.109.95
45	10.167.109.96/29	10.167.109.97 – 10.167.109.102	10.167.109.103
46	10.167.109.104/29	10.167.109.105 – 10.167.109.110	10.167.109.111
47	10.167.109.112/29	10.167.109.113 – 10.167.109.118	10.167.109.119
48	10.167.109.120/29	10.167.109.121 – 10.167.109.126	10.167.109.127
49	10.167.109.128/29	10.167.109.129 – 10.167.109.134	10.167.109.135
50	10.167.109.136/29	10.167.109.137 – 10.167.109.142	10.167.109.143
51	10.167.109.144/29	10.167.109.145 – 10.167.109.150	10.167.109.151
52	10.167.109.152/29	10.167.109.153 – 10.167.109.158	10.167.109.159
53	10.167.109.160/29	10.167.109.161 – 10.167.109.166	10.167.109.167
54	10.167.109.168/29	10.167.109.169 – 10.167.109.174	10.167.109.175
55	10.167.109.176/29	10.167.109.177 – 10.167.109.182	10.167.109.183
56	10.167.109.184/29	10.167.109.185 – 10.167.109.190	10.167.109.191
57	10.167.109.192/29	10.167.109.193 – 10.167.109.198	10.167.109.199
58	10.167.109.200/29	10.167.109.201 – 10.167.109.206	10.167.109.207
59	10.167.109.208/29	10.167.109.209 – 10.167.109.214	10.167.109.215
60	10.167.109.216/29	10.167.109.217 – 10.167.109.222	10.167.109.223
61	10.167.109.224/29	10.167.109.225 – 10.167.109.230	10.167.109.231
62	10.167.109.232/29	10.167.109.233 – 10.167.109.238	10.167.109.239
63	10.167.109.240/29	10.167.109.241 – 10.167.109.246	10.167.109.247
64	10.167.109.248/29	10.167.109.249 – 10.167.109.254	10.167.109.255

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 →