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)10.2.160.0/19

network10.2.160.0/19

broadcast10.2.191.255

first host10.2.160.1

last host10.2.191.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.2.160.0/19

address00001010.00000010.10100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00000010.10100000.00000000

broadcast00001010.00000010.10111111.11111111

green = network part, grey = host part

hex0x0a02a000

decimal167944192

reverse dns0.160.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:a000

/19 split into /26 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.160.0/26	10.2.160.1 – 10.2.160.62	10.2.160.63
2	10.2.160.64/26	10.2.160.65 – 10.2.160.126	10.2.160.127
3	10.2.160.128/26	10.2.160.129 – 10.2.160.190	10.2.160.191
4	10.2.160.192/26	10.2.160.193 – 10.2.160.254	10.2.160.255
5	10.2.161.0/26	10.2.161.1 – 10.2.161.62	10.2.161.63
6	10.2.161.64/26	10.2.161.65 – 10.2.161.126	10.2.161.127
7	10.2.161.128/26	10.2.161.129 – 10.2.161.190	10.2.161.191
8	10.2.161.192/26	10.2.161.193 – 10.2.161.254	10.2.161.255
9	10.2.162.0/26	10.2.162.1 – 10.2.162.62	10.2.162.63
10	10.2.162.64/26	10.2.162.65 – 10.2.162.126	10.2.162.127
11	10.2.162.128/26	10.2.162.129 – 10.2.162.190	10.2.162.191
12	10.2.162.192/26	10.2.162.193 – 10.2.162.254	10.2.162.255
13	10.2.163.0/26	10.2.163.1 – 10.2.163.62	10.2.163.63
14	10.2.163.64/26	10.2.163.65 – 10.2.163.126	10.2.163.127
15	10.2.163.128/26	10.2.163.129 – 10.2.163.190	10.2.163.191
16	10.2.163.192/26	10.2.163.193 – 10.2.163.254	10.2.163.255
17	10.2.164.0/26	10.2.164.1 – 10.2.164.62	10.2.164.63
18	10.2.164.64/26	10.2.164.65 – 10.2.164.126	10.2.164.127
19	10.2.164.128/26	10.2.164.129 – 10.2.164.190	10.2.164.191
20	10.2.164.192/26	10.2.164.193 – 10.2.164.254	10.2.164.255
21	10.2.165.0/26	10.2.165.1 – 10.2.165.62	10.2.165.63
22	10.2.165.64/26	10.2.165.65 – 10.2.165.126	10.2.165.127
23	10.2.165.128/26	10.2.165.129 – 10.2.165.190	10.2.165.191
24	10.2.165.192/26	10.2.165.193 – 10.2.165.254	10.2.165.255
25	10.2.166.0/26	10.2.166.1 – 10.2.166.62	10.2.166.63
26	10.2.166.64/26	10.2.166.65 – 10.2.166.126	10.2.166.127
27	10.2.166.128/26	10.2.166.129 – 10.2.166.190	10.2.166.191
28	10.2.166.192/26	10.2.166.193 – 10.2.166.254	10.2.166.255
29	10.2.167.0/26	10.2.167.1 – 10.2.167.62	10.2.167.63
30	10.2.167.64/26	10.2.167.65 – 10.2.167.126	10.2.167.127
31	10.2.167.128/26	10.2.167.129 – 10.2.167.190	10.2.167.191
32	10.2.167.192/26	10.2.167.193 – 10.2.167.254	10.2.167.255
33	10.2.168.0/26	10.2.168.1 – 10.2.168.62	10.2.168.63
34	10.2.168.64/26	10.2.168.65 – 10.2.168.126	10.2.168.127
35	10.2.168.128/26	10.2.168.129 – 10.2.168.190	10.2.168.191
36	10.2.168.192/26	10.2.168.193 – 10.2.168.254	10.2.168.255
37	10.2.169.0/26	10.2.169.1 – 10.2.169.62	10.2.169.63
38	10.2.169.64/26	10.2.169.65 – 10.2.169.126	10.2.169.127
39	10.2.169.128/26	10.2.169.129 – 10.2.169.190	10.2.169.191
40	10.2.169.192/26	10.2.169.193 – 10.2.169.254	10.2.169.255
41	10.2.170.0/26	10.2.170.1 – 10.2.170.62	10.2.170.63
42	10.2.170.64/26	10.2.170.65 – 10.2.170.126	10.2.170.127
43	10.2.170.128/26	10.2.170.129 – 10.2.170.190	10.2.170.191
44	10.2.170.192/26	10.2.170.193 – 10.2.170.254	10.2.170.255
45	10.2.171.0/26	10.2.171.1 – 10.2.171.62	10.2.171.63
46	10.2.171.64/26	10.2.171.65 – 10.2.171.126	10.2.171.127
47	10.2.171.128/26	10.2.171.129 – 10.2.171.190	10.2.171.191
48	10.2.171.192/26	10.2.171.193 – 10.2.171.254	10.2.171.255
49	10.2.172.0/26	10.2.172.1 – 10.2.172.62	10.2.172.63
50	10.2.172.64/26	10.2.172.65 – 10.2.172.126	10.2.172.127
51	10.2.172.128/26	10.2.172.129 – 10.2.172.190	10.2.172.191
52	10.2.172.192/26	10.2.172.193 – 10.2.172.254	10.2.172.255
53	10.2.173.0/26	10.2.173.1 – 10.2.173.62	10.2.173.63
54	10.2.173.64/26	10.2.173.65 – 10.2.173.126	10.2.173.127
55	10.2.173.128/26	10.2.173.129 – 10.2.173.190	10.2.173.191
56	10.2.173.192/26	10.2.173.193 – 10.2.173.254	10.2.173.255
57	10.2.174.0/26	10.2.174.1 – 10.2.174.62	10.2.174.63
58	10.2.174.64/26	10.2.174.65 – 10.2.174.126	10.2.174.127
59	10.2.174.128/26	10.2.174.129 – 10.2.174.190	10.2.174.191
60	10.2.174.192/26	10.2.174.193 – 10.2.174.254	10.2.174.255
61	10.2.175.0/26	10.2.175.1 – 10.2.175.62	10.2.175.63
62	10.2.175.64/26	10.2.175.65 – 10.2.175.126	10.2.175.127
63	10.2.175.128/26	10.2.175.129 – 10.2.175.190	10.2.175.191
64	10.2.175.192/26	10.2.175.193 – 10.2.175.254	10.2.175.255
65	10.2.176.0/26	10.2.176.1 – 10.2.176.62	10.2.176.63
66	10.2.176.64/26	10.2.176.65 – 10.2.176.126	10.2.176.127
67	10.2.176.128/26	10.2.176.129 – 10.2.176.190	10.2.176.191
68	10.2.176.192/26	10.2.176.193 – 10.2.176.254	10.2.176.255
69	10.2.177.0/26	10.2.177.1 – 10.2.177.62	10.2.177.63
70	10.2.177.64/26	10.2.177.65 – 10.2.177.126	10.2.177.127
71	10.2.177.128/26	10.2.177.129 – 10.2.177.190	10.2.177.191
72	10.2.177.192/26	10.2.177.193 – 10.2.177.254	10.2.177.255
73	10.2.178.0/26	10.2.178.1 – 10.2.178.62	10.2.178.63
74	10.2.178.64/26	10.2.178.65 – 10.2.178.126	10.2.178.127
75	10.2.178.128/26	10.2.178.129 – 10.2.178.190	10.2.178.191
76	10.2.178.192/26	10.2.178.193 – 10.2.178.254	10.2.178.255
77	10.2.179.0/26	10.2.179.1 – 10.2.179.62	10.2.179.63
78	10.2.179.64/26	10.2.179.65 – 10.2.179.126	10.2.179.127
79	10.2.179.128/26	10.2.179.129 – 10.2.179.190	10.2.179.191
80	10.2.179.192/26	10.2.179.193 – 10.2.179.254	10.2.179.255
81	10.2.180.0/26	10.2.180.1 – 10.2.180.62	10.2.180.63
82	10.2.180.64/26	10.2.180.65 – 10.2.180.126	10.2.180.127
83	10.2.180.128/26	10.2.180.129 – 10.2.180.190	10.2.180.191
84	10.2.180.192/26	10.2.180.193 – 10.2.180.254	10.2.180.255
85	10.2.181.0/26	10.2.181.1 – 10.2.181.62	10.2.181.63
86	10.2.181.64/26	10.2.181.65 – 10.2.181.126	10.2.181.127
87	10.2.181.128/26	10.2.181.129 – 10.2.181.190	10.2.181.191
88	10.2.181.192/26	10.2.181.193 – 10.2.181.254	10.2.181.255
89	10.2.182.0/26	10.2.182.1 – 10.2.182.62	10.2.182.63
90	10.2.182.64/26	10.2.182.65 – 10.2.182.126	10.2.182.127
91	10.2.182.128/26	10.2.182.129 – 10.2.182.190	10.2.182.191
92	10.2.182.192/26	10.2.182.193 – 10.2.182.254	10.2.182.255
93	10.2.183.0/26	10.2.183.1 – 10.2.183.62	10.2.183.63
94	10.2.183.64/26	10.2.183.65 – 10.2.183.126	10.2.183.127
95	10.2.183.128/26	10.2.183.129 – 10.2.183.190	10.2.183.191
96	10.2.183.192/26	10.2.183.193 – 10.2.183.254	10.2.183.255
97	10.2.184.0/26	10.2.184.1 – 10.2.184.62	10.2.184.63
98	10.2.184.64/26	10.2.184.65 – 10.2.184.126	10.2.184.127
99	10.2.184.128/26	10.2.184.129 – 10.2.184.190	10.2.184.191
100	10.2.184.192/26	10.2.184.193 – 10.2.184.254	10.2.184.255
101	10.2.185.0/26	10.2.185.1 – 10.2.185.62	10.2.185.63
102	10.2.185.64/26	10.2.185.65 – 10.2.185.126	10.2.185.127
103	10.2.185.128/26	10.2.185.129 – 10.2.185.190	10.2.185.191
104	10.2.185.192/26	10.2.185.193 – 10.2.185.254	10.2.185.255
105	10.2.186.0/26	10.2.186.1 – 10.2.186.62	10.2.186.63
106	10.2.186.64/26	10.2.186.65 – 10.2.186.126	10.2.186.127
107	10.2.186.128/26	10.2.186.129 – 10.2.186.190	10.2.186.191
108	10.2.186.192/26	10.2.186.193 – 10.2.186.254	10.2.186.255
109	10.2.187.0/26	10.2.187.1 – 10.2.187.62	10.2.187.63
110	10.2.187.64/26	10.2.187.65 – 10.2.187.126	10.2.187.127
111	10.2.187.128/26	10.2.187.129 – 10.2.187.190	10.2.187.191
112	10.2.187.192/26	10.2.187.193 – 10.2.187.254	10.2.187.255
113	10.2.188.0/26	10.2.188.1 – 10.2.188.62	10.2.188.63
114	10.2.188.64/26	10.2.188.65 – 10.2.188.126	10.2.188.127
115	10.2.188.128/26	10.2.188.129 – 10.2.188.190	10.2.188.191
116	10.2.188.192/26	10.2.188.193 – 10.2.188.254	10.2.188.255
117	10.2.189.0/26	10.2.189.1 – 10.2.189.62	10.2.189.63
118	10.2.189.64/26	10.2.189.65 – 10.2.189.126	10.2.189.127
119	10.2.189.128/26	10.2.189.129 – 10.2.189.190	10.2.189.191
120	10.2.189.192/26	10.2.189.193 – 10.2.189.254	10.2.189.255
121	10.2.190.0/26	10.2.190.1 – 10.2.190.62	10.2.190.63
122	10.2.190.64/26	10.2.190.65 – 10.2.190.126	10.2.190.127
123	10.2.190.128/26	10.2.190.129 – 10.2.190.190	10.2.190.191
124	10.2.190.192/26	10.2.190.193 – 10.2.190.254	10.2.190.255
125	10.2.191.0/26	10.2.191.1 – 10.2.191.62	10.2.191.63
126	10.2.191.64/26	10.2.191.65 – 10.2.191.126	10.2.191.127
127	10.2.191.128/26	10.2.191.129 – 10.2.191.190	10.2.191.191
128	10.2.191.192/26	10.2.191.193 – 10.2.191.254	10.2.191.255

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →