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)10.167.110.0/23

network10.167.110.0/23

broadcast10.167.111.255

first host10.167.110.1

last host10.167.111.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.167.110.0/23

address00001010.10100111.01101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10100111.01101110.00000000

broadcast00001010.10100111.01101111.11111111

green = network part, grey = host part

hex0x0aa76e00

decimal178744832

reverse dns0.110.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:6e00

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.110.0/29	10.167.110.1 – 10.167.110.6	10.167.110.7
2	10.167.110.8/29	10.167.110.9 – 10.167.110.14	10.167.110.15
3	10.167.110.16/29	10.167.110.17 – 10.167.110.22	10.167.110.23
4	10.167.110.24/29	10.167.110.25 – 10.167.110.30	10.167.110.31
5	10.167.110.32/29	10.167.110.33 – 10.167.110.38	10.167.110.39
6	10.167.110.40/29	10.167.110.41 – 10.167.110.46	10.167.110.47
7	10.167.110.48/29	10.167.110.49 – 10.167.110.54	10.167.110.55
8	10.167.110.56/29	10.167.110.57 – 10.167.110.62	10.167.110.63
9	10.167.110.64/29	10.167.110.65 – 10.167.110.70	10.167.110.71
10	10.167.110.72/29	10.167.110.73 – 10.167.110.78	10.167.110.79
11	10.167.110.80/29	10.167.110.81 – 10.167.110.86	10.167.110.87
12	10.167.110.88/29	10.167.110.89 – 10.167.110.94	10.167.110.95
13	10.167.110.96/29	10.167.110.97 – 10.167.110.102	10.167.110.103
14	10.167.110.104/29	10.167.110.105 – 10.167.110.110	10.167.110.111
15	10.167.110.112/29	10.167.110.113 – 10.167.110.118	10.167.110.119
16	10.167.110.120/29	10.167.110.121 – 10.167.110.126	10.167.110.127
17	10.167.110.128/29	10.167.110.129 – 10.167.110.134	10.167.110.135
18	10.167.110.136/29	10.167.110.137 – 10.167.110.142	10.167.110.143
19	10.167.110.144/29	10.167.110.145 – 10.167.110.150	10.167.110.151
20	10.167.110.152/29	10.167.110.153 – 10.167.110.158	10.167.110.159
21	10.167.110.160/29	10.167.110.161 – 10.167.110.166	10.167.110.167
22	10.167.110.168/29	10.167.110.169 – 10.167.110.174	10.167.110.175
23	10.167.110.176/29	10.167.110.177 – 10.167.110.182	10.167.110.183
24	10.167.110.184/29	10.167.110.185 – 10.167.110.190	10.167.110.191
25	10.167.110.192/29	10.167.110.193 – 10.167.110.198	10.167.110.199
26	10.167.110.200/29	10.167.110.201 – 10.167.110.206	10.167.110.207
27	10.167.110.208/29	10.167.110.209 – 10.167.110.214	10.167.110.215
28	10.167.110.216/29	10.167.110.217 – 10.167.110.222	10.167.110.223
29	10.167.110.224/29	10.167.110.225 – 10.167.110.230	10.167.110.231
30	10.167.110.232/29	10.167.110.233 – 10.167.110.238	10.167.110.239
31	10.167.110.240/29	10.167.110.241 – 10.167.110.246	10.167.110.247
32	10.167.110.248/29	10.167.110.249 – 10.167.110.254	10.167.110.255
33	10.167.111.0/29	10.167.111.1 – 10.167.111.6	10.167.111.7
34	10.167.111.8/29	10.167.111.9 – 10.167.111.14	10.167.111.15
35	10.167.111.16/29	10.167.111.17 – 10.167.111.22	10.167.111.23
36	10.167.111.24/29	10.167.111.25 – 10.167.111.30	10.167.111.31
37	10.167.111.32/29	10.167.111.33 – 10.167.111.38	10.167.111.39
38	10.167.111.40/29	10.167.111.41 – 10.167.111.46	10.167.111.47
39	10.167.111.48/29	10.167.111.49 – 10.167.111.54	10.167.111.55
40	10.167.111.56/29	10.167.111.57 – 10.167.111.62	10.167.111.63
41	10.167.111.64/29	10.167.111.65 – 10.167.111.70	10.167.111.71
42	10.167.111.72/29	10.167.111.73 – 10.167.111.78	10.167.111.79
43	10.167.111.80/29	10.167.111.81 – 10.167.111.86	10.167.111.87
44	10.167.111.88/29	10.167.111.89 – 10.167.111.94	10.167.111.95
45	10.167.111.96/29	10.167.111.97 – 10.167.111.102	10.167.111.103
46	10.167.111.104/29	10.167.111.105 – 10.167.111.110	10.167.111.111
47	10.167.111.112/29	10.167.111.113 – 10.167.111.118	10.167.111.119
48	10.167.111.120/29	10.167.111.121 – 10.167.111.126	10.167.111.127
49	10.167.111.128/29	10.167.111.129 – 10.167.111.134	10.167.111.135
50	10.167.111.136/29	10.167.111.137 – 10.167.111.142	10.167.111.143
51	10.167.111.144/29	10.167.111.145 – 10.167.111.150	10.167.111.151
52	10.167.111.152/29	10.167.111.153 – 10.167.111.158	10.167.111.159
53	10.167.111.160/29	10.167.111.161 – 10.167.111.166	10.167.111.167
54	10.167.111.168/29	10.167.111.169 – 10.167.111.174	10.167.111.175
55	10.167.111.176/29	10.167.111.177 – 10.167.111.182	10.167.111.183
56	10.167.111.184/29	10.167.111.185 – 10.167.111.190	10.167.111.191
57	10.167.111.192/29	10.167.111.193 – 10.167.111.198	10.167.111.199
58	10.167.111.200/29	10.167.111.201 – 10.167.111.206	10.167.111.207
59	10.167.111.208/29	10.167.111.209 – 10.167.111.214	10.167.111.215
60	10.167.111.216/29	10.167.111.217 – 10.167.111.222	10.167.111.223
61	10.167.111.224/29	10.167.111.225 – 10.167.111.230	10.167.111.231
62	10.167.111.232/29	10.167.111.233 – 10.167.111.238	10.167.111.239
63	10.167.111.240/29	10.167.111.241 – 10.167.111.246	10.167.111.247
64	10.167.111.248/29	10.167.111.249 – 10.167.111.254	10.167.111.255

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 →