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)10.77.82.0/23

network10.77.82.0/23

broadcast10.77.83.255

first host10.77.82.1

last host10.77.83.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.77.82.0/23

address00001010.01001101.01010010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.01001101.01010010.00000000

broadcast00001010.01001101.01010011.11111111

green = network part, grey = host part

hex0x0a4d5200

decimal172839424

reverse dns0.82.77.10.in-addr.arpa

ipv4-mapped::ffff:a4d:5200

/23 split into /29 · 64 subnets

close ×

#	network	host range	broadcast
1	10.77.82.0/29	10.77.82.1 – 10.77.82.6	10.77.82.7
2	10.77.82.8/29	10.77.82.9 – 10.77.82.14	10.77.82.15
3	10.77.82.16/29	10.77.82.17 – 10.77.82.22	10.77.82.23
4	10.77.82.24/29	10.77.82.25 – 10.77.82.30	10.77.82.31
5	10.77.82.32/29	10.77.82.33 – 10.77.82.38	10.77.82.39
6	10.77.82.40/29	10.77.82.41 – 10.77.82.46	10.77.82.47
7	10.77.82.48/29	10.77.82.49 – 10.77.82.54	10.77.82.55
8	10.77.82.56/29	10.77.82.57 – 10.77.82.62	10.77.82.63
9	10.77.82.64/29	10.77.82.65 – 10.77.82.70	10.77.82.71
10	10.77.82.72/29	10.77.82.73 – 10.77.82.78	10.77.82.79
11	10.77.82.80/29	10.77.82.81 – 10.77.82.86	10.77.82.87
12	10.77.82.88/29	10.77.82.89 – 10.77.82.94	10.77.82.95
13	10.77.82.96/29	10.77.82.97 – 10.77.82.102	10.77.82.103
14	10.77.82.104/29	10.77.82.105 – 10.77.82.110	10.77.82.111
15	10.77.82.112/29	10.77.82.113 – 10.77.82.118	10.77.82.119
16	10.77.82.120/29	10.77.82.121 – 10.77.82.126	10.77.82.127
17	10.77.82.128/29	10.77.82.129 – 10.77.82.134	10.77.82.135
18	10.77.82.136/29	10.77.82.137 – 10.77.82.142	10.77.82.143
19	10.77.82.144/29	10.77.82.145 – 10.77.82.150	10.77.82.151
20	10.77.82.152/29	10.77.82.153 – 10.77.82.158	10.77.82.159
21	10.77.82.160/29	10.77.82.161 – 10.77.82.166	10.77.82.167
22	10.77.82.168/29	10.77.82.169 – 10.77.82.174	10.77.82.175
23	10.77.82.176/29	10.77.82.177 – 10.77.82.182	10.77.82.183
24	10.77.82.184/29	10.77.82.185 – 10.77.82.190	10.77.82.191
25	10.77.82.192/29	10.77.82.193 – 10.77.82.198	10.77.82.199
26	10.77.82.200/29	10.77.82.201 – 10.77.82.206	10.77.82.207
27	10.77.82.208/29	10.77.82.209 – 10.77.82.214	10.77.82.215
28	10.77.82.216/29	10.77.82.217 – 10.77.82.222	10.77.82.223
29	10.77.82.224/29	10.77.82.225 – 10.77.82.230	10.77.82.231
30	10.77.82.232/29	10.77.82.233 – 10.77.82.238	10.77.82.239
31	10.77.82.240/29	10.77.82.241 – 10.77.82.246	10.77.82.247
32	10.77.82.248/29	10.77.82.249 – 10.77.82.254	10.77.82.255
33	10.77.83.0/29	10.77.83.1 – 10.77.83.6	10.77.83.7
34	10.77.83.8/29	10.77.83.9 – 10.77.83.14	10.77.83.15
35	10.77.83.16/29	10.77.83.17 – 10.77.83.22	10.77.83.23
36	10.77.83.24/29	10.77.83.25 – 10.77.83.30	10.77.83.31
37	10.77.83.32/29	10.77.83.33 – 10.77.83.38	10.77.83.39
38	10.77.83.40/29	10.77.83.41 – 10.77.83.46	10.77.83.47
39	10.77.83.48/29	10.77.83.49 – 10.77.83.54	10.77.83.55
40	10.77.83.56/29	10.77.83.57 – 10.77.83.62	10.77.83.63
41	10.77.83.64/29	10.77.83.65 – 10.77.83.70	10.77.83.71
42	10.77.83.72/29	10.77.83.73 – 10.77.83.78	10.77.83.79
43	10.77.83.80/29	10.77.83.81 – 10.77.83.86	10.77.83.87
44	10.77.83.88/29	10.77.83.89 – 10.77.83.94	10.77.83.95
45	10.77.83.96/29	10.77.83.97 – 10.77.83.102	10.77.83.103
46	10.77.83.104/29	10.77.83.105 – 10.77.83.110	10.77.83.111
47	10.77.83.112/29	10.77.83.113 – 10.77.83.118	10.77.83.119
48	10.77.83.120/29	10.77.83.121 – 10.77.83.126	10.77.83.127
49	10.77.83.128/29	10.77.83.129 – 10.77.83.134	10.77.83.135
50	10.77.83.136/29	10.77.83.137 – 10.77.83.142	10.77.83.143
51	10.77.83.144/29	10.77.83.145 – 10.77.83.150	10.77.83.151
52	10.77.83.152/29	10.77.83.153 – 10.77.83.158	10.77.83.159
53	10.77.83.160/29	10.77.83.161 – 10.77.83.166	10.77.83.167
54	10.77.83.168/29	10.77.83.169 – 10.77.83.174	10.77.83.175
55	10.77.83.176/29	10.77.83.177 – 10.77.83.182	10.77.83.183
56	10.77.83.184/29	10.77.83.185 – 10.77.83.190	10.77.83.191
57	10.77.83.192/29	10.77.83.193 – 10.77.83.198	10.77.83.199
58	10.77.83.200/29	10.77.83.201 – 10.77.83.206	10.77.83.207
59	10.77.83.208/29	10.77.83.209 – 10.77.83.214	10.77.83.215
60	10.77.83.216/29	10.77.83.217 – 10.77.83.222	10.77.83.223
61	10.77.83.224/29	10.77.83.225 – 10.77.83.230	10.77.83.231
62	10.77.83.232/29	10.77.83.233 – 10.77.83.238	10.77.83.239
63	10.77.83.240/29	10.77.83.241 – 10.77.83.246	10.77.83.247
64	10.77.83.248/29	10.77.83.249 – 10.77.83.254	10.77.83.255

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 →