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)172.16.14.0/23

network172.16.14.0/23

broadcast172.16.15.255

first host172.16.14.1

last host172.16.15.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classB

ipcalc 172.16.14.0/23

address10101100.00010000.00001110.00000000

subnet mask11111111.11111111.11111110.00000000

network10101100.00010000.00001110.00000000

broadcast10101100.00010000.00001111.11111111

green = network part, grey = host part

hex0xac100e00

decimal2886733312

reverse dns0.14.16.172.in-addr.arpa

ipv4-mapped::ffff:ac10:e00

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	172.16.14.0/29	172.16.14.1 – 172.16.14.6	172.16.14.7
2	172.16.14.8/29	172.16.14.9 – 172.16.14.14	172.16.14.15
3	172.16.14.16/29	172.16.14.17 – 172.16.14.22	172.16.14.23
4	172.16.14.24/29	172.16.14.25 – 172.16.14.30	172.16.14.31
5	172.16.14.32/29	172.16.14.33 – 172.16.14.38	172.16.14.39
6	172.16.14.40/29	172.16.14.41 – 172.16.14.46	172.16.14.47
7	172.16.14.48/29	172.16.14.49 – 172.16.14.54	172.16.14.55
8	172.16.14.56/29	172.16.14.57 – 172.16.14.62	172.16.14.63
9	172.16.14.64/29	172.16.14.65 – 172.16.14.70	172.16.14.71
10	172.16.14.72/29	172.16.14.73 – 172.16.14.78	172.16.14.79
11	172.16.14.80/29	172.16.14.81 – 172.16.14.86	172.16.14.87
12	172.16.14.88/29	172.16.14.89 – 172.16.14.94	172.16.14.95
13	172.16.14.96/29	172.16.14.97 – 172.16.14.102	172.16.14.103
14	172.16.14.104/29	172.16.14.105 – 172.16.14.110	172.16.14.111
15	172.16.14.112/29	172.16.14.113 – 172.16.14.118	172.16.14.119
16	172.16.14.120/29	172.16.14.121 – 172.16.14.126	172.16.14.127
17	172.16.14.128/29	172.16.14.129 – 172.16.14.134	172.16.14.135
18	172.16.14.136/29	172.16.14.137 – 172.16.14.142	172.16.14.143
19	172.16.14.144/29	172.16.14.145 – 172.16.14.150	172.16.14.151
20	172.16.14.152/29	172.16.14.153 – 172.16.14.158	172.16.14.159
21	172.16.14.160/29	172.16.14.161 – 172.16.14.166	172.16.14.167
22	172.16.14.168/29	172.16.14.169 – 172.16.14.174	172.16.14.175
23	172.16.14.176/29	172.16.14.177 – 172.16.14.182	172.16.14.183
24	172.16.14.184/29	172.16.14.185 – 172.16.14.190	172.16.14.191
25	172.16.14.192/29	172.16.14.193 – 172.16.14.198	172.16.14.199
26	172.16.14.200/29	172.16.14.201 – 172.16.14.206	172.16.14.207
27	172.16.14.208/29	172.16.14.209 – 172.16.14.214	172.16.14.215
28	172.16.14.216/29	172.16.14.217 – 172.16.14.222	172.16.14.223
29	172.16.14.224/29	172.16.14.225 – 172.16.14.230	172.16.14.231
30	172.16.14.232/29	172.16.14.233 – 172.16.14.238	172.16.14.239
31	172.16.14.240/29	172.16.14.241 – 172.16.14.246	172.16.14.247
32	172.16.14.248/29	172.16.14.249 – 172.16.14.254	172.16.14.255
33	172.16.15.0/29	172.16.15.1 – 172.16.15.6	172.16.15.7
34	172.16.15.8/29	172.16.15.9 – 172.16.15.14	172.16.15.15
35	172.16.15.16/29	172.16.15.17 – 172.16.15.22	172.16.15.23
36	172.16.15.24/29	172.16.15.25 – 172.16.15.30	172.16.15.31
37	172.16.15.32/29	172.16.15.33 – 172.16.15.38	172.16.15.39
38	172.16.15.40/29	172.16.15.41 – 172.16.15.46	172.16.15.47
39	172.16.15.48/29	172.16.15.49 – 172.16.15.54	172.16.15.55
40	172.16.15.56/29	172.16.15.57 – 172.16.15.62	172.16.15.63
41	172.16.15.64/29	172.16.15.65 – 172.16.15.70	172.16.15.71
42	172.16.15.72/29	172.16.15.73 – 172.16.15.78	172.16.15.79
43	172.16.15.80/29	172.16.15.81 – 172.16.15.86	172.16.15.87
44	172.16.15.88/29	172.16.15.89 – 172.16.15.94	172.16.15.95
45	172.16.15.96/29	172.16.15.97 – 172.16.15.102	172.16.15.103
46	172.16.15.104/29	172.16.15.105 – 172.16.15.110	172.16.15.111
47	172.16.15.112/29	172.16.15.113 – 172.16.15.118	172.16.15.119
48	172.16.15.120/29	172.16.15.121 – 172.16.15.126	172.16.15.127
49	172.16.15.128/29	172.16.15.129 – 172.16.15.134	172.16.15.135
50	172.16.15.136/29	172.16.15.137 – 172.16.15.142	172.16.15.143
51	172.16.15.144/29	172.16.15.145 – 172.16.15.150	172.16.15.151
52	172.16.15.152/29	172.16.15.153 – 172.16.15.158	172.16.15.159
53	172.16.15.160/29	172.16.15.161 – 172.16.15.166	172.16.15.167
54	172.16.15.168/29	172.16.15.169 – 172.16.15.174	172.16.15.175
55	172.16.15.176/29	172.16.15.177 – 172.16.15.182	172.16.15.183
56	172.16.15.184/29	172.16.15.185 – 172.16.15.190	172.16.15.191
57	172.16.15.192/29	172.16.15.193 – 172.16.15.198	172.16.15.199
58	172.16.15.200/29	172.16.15.201 – 172.16.15.206	172.16.15.207
59	172.16.15.208/29	172.16.15.209 – 172.16.15.214	172.16.15.215
60	172.16.15.216/29	172.16.15.217 – 172.16.15.222	172.16.15.223
61	172.16.15.224/29	172.16.15.225 – 172.16.15.230	172.16.15.231
62	172.16.15.232/29	172.16.15.233 – 172.16.15.238	172.16.15.239
63	172.16.15.240/29	172.16.15.241 – 172.16.15.246	172.16.15.247
64	172.16.15.248/29	172.16.15.249 – 172.16.15.254	172.16.15.255

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 →