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)10.71.96.0/19

network10.71.96.0/19

broadcast10.71.127.255

first host10.71.96.1

last host10.71.127.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.71.96.0/19

address00001010.01000111.01100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.01000111.01100000.00000000

broadcast00001010.01000111.01111111.11111111

green = network part, grey = host part

hex0x0a476000

decimal172449792

reverse dns0.96.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:6000

/19 split into /26 · 128 subnets

close ×

#	network	host range	broadcast
1	10.71.96.0/26	10.71.96.1 – 10.71.96.62	10.71.96.63
2	10.71.96.64/26	10.71.96.65 – 10.71.96.126	10.71.96.127
3	10.71.96.128/26	10.71.96.129 – 10.71.96.190	10.71.96.191
4	10.71.96.192/26	10.71.96.193 – 10.71.96.254	10.71.96.255
5	10.71.97.0/26	10.71.97.1 – 10.71.97.62	10.71.97.63
6	10.71.97.64/26	10.71.97.65 – 10.71.97.126	10.71.97.127
7	10.71.97.128/26	10.71.97.129 – 10.71.97.190	10.71.97.191
8	10.71.97.192/26	10.71.97.193 – 10.71.97.254	10.71.97.255
9	10.71.98.0/26	10.71.98.1 – 10.71.98.62	10.71.98.63
10	10.71.98.64/26	10.71.98.65 – 10.71.98.126	10.71.98.127
11	10.71.98.128/26	10.71.98.129 – 10.71.98.190	10.71.98.191
12	10.71.98.192/26	10.71.98.193 – 10.71.98.254	10.71.98.255
13	10.71.99.0/26	10.71.99.1 – 10.71.99.62	10.71.99.63
14	10.71.99.64/26	10.71.99.65 – 10.71.99.126	10.71.99.127
15	10.71.99.128/26	10.71.99.129 – 10.71.99.190	10.71.99.191
16	10.71.99.192/26	10.71.99.193 – 10.71.99.254	10.71.99.255
17	10.71.100.0/26	10.71.100.1 – 10.71.100.62	10.71.100.63
18	10.71.100.64/26	10.71.100.65 – 10.71.100.126	10.71.100.127
19	10.71.100.128/26	10.71.100.129 – 10.71.100.190	10.71.100.191
20	10.71.100.192/26	10.71.100.193 – 10.71.100.254	10.71.100.255
21	10.71.101.0/26	10.71.101.1 – 10.71.101.62	10.71.101.63
22	10.71.101.64/26	10.71.101.65 – 10.71.101.126	10.71.101.127
23	10.71.101.128/26	10.71.101.129 – 10.71.101.190	10.71.101.191
24	10.71.101.192/26	10.71.101.193 – 10.71.101.254	10.71.101.255
25	10.71.102.0/26	10.71.102.1 – 10.71.102.62	10.71.102.63
26	10.71.102.64/26	10.71.102.65 – 10.71.102.126	10.71.102.127
27	10.71.102.128/26	10.71.102.129 – 10.71.102.190	10.71.102.191
28	10.71.102.192/26	10.71.102.193 – 10.71.102.254	10.71.102.255
29	10.71.103.0/26	10.71.103.1 – 10.71.103.62	10.71.103.63
30	10.71.103.64/26	10.71.103.65 – 10.71.103.126	10.71.103.127
31	10.71.103.128/26	10.71.103.129 – 10.71.103.190	10.71.103.191
32	10.71.103.192/26	10.71.103.193 – 10.71.103.254	10.71.103.255
33	10.71.104.0/26	10.71.104.1 – 10.71.104.62	10.71.104.63
34	10.71.104.64/26	10.71.104.65 – 10.71.104.126	10.71.104.127
35	10.71.104.128/26	10.71.104.129 – 10.71.104.190	10.71.104.191
36	10.71.104.192/26	10.71.104.193 – 10.71.104.254	10.71.104.255
37	10.71.105.0/26	10.71.105.1 – 10.71.105.62	10.71.105.63
38	10.71.105.64/26	10.71.105.65 – 10.71.105.126	10.71.105.127
39	10.71.105.128/26	10.71.105.129 – 10.71.105.190	10.71.105.191
40	10.71.105.192/26	10.71.105.193 – 10.71.105.254	10.71.105.255
41	10.71.106.0/26	10.71.106.1 – 10.71.106.62	10.71.106.63
42	10.71.106.64/26	10.71.106.65 – 10.71.106.126	10.71.106.127
43	10.71.106.128/26	10.71.106.129 – 10.71.106.190	10.71.106.191
44	10.71.106.192/26	10.71.106.193 – 10.71.106.254	10.71.106.255
45	10.71.107.0/26	10.71.107.1 – 10.71.107.62	10.71.107.63
46	10.71.107.64/26	10.71.107.65 – 10.71.107.126	10.71.107.127
47	10.71.107.128/26	10.71.107.129 – 10.71.107.190	10.71.107.191
48	10.71.107.192/26	10.71.107.193 – 10.71.107.254	10.71.107.255
49	10.71.108.0/26	10.71.108.1 – 10.71.108.62	10.71.108.63
50	10.71.108.64/26	10.71.108.65 – 10.71.108.126	10.71.108.127
51	10.71.108.128/26	10.71.108.129 – 10.71.108.190	10.71.108.191
52	10.71.108.192/26	10.71.108.193 – 10.71.108.254	10.71.108.255
53	10.71.109.0/26	10.71.109.1 – 10.71.109.62	10.71.109.63
54	10.71.109.64/26	10.71.109.65 – 10.71.109.126	10.71.109.127
55	10.71.109.128/26	10.71.109.129 – 10.71.109.190	10.71.109.191
56	10.71.109.192/26	10.71.109.193 – 10.71.109.254	10.71.109.255
57	10.71.110.0/26	10.71.110.1 – 10.71.110.62	10.71.110.63
58	10.71.110.64/26	10.71.110.65 – 10.71.110.126	10.71.110.127
59	10.71.110.128/26	10.71.110.129 – 10.71.110.190	10.71.110.191
60	10.71.110.192/26	10.71.110.193 – 10.71.110.254	10.71.110.255
61	10.71.111.0/26	10.71.111.1 – 10.71.111.62	10.71.111.63
62	10.71.111.64/26	10.71.111.65 – 10.71.111.126	10.71.111.127
63	10.71.111.128/26	10.71.111.129 – 10.71.111.190	10.71.111.191
64	10.71.111.192/26	10.71.111.193 – 10.71.111.254	10.71.111.255
65	10.71.112.0/26	10.71.112.1 – 10.71.112.62	10.71.112.63
66	10.71.112.64/26	10.71.112.65 – 10.71.112.126	10.71.112.127
67	10.71.112.128/26	10.71.112.129 – 10.71.112.190	10.71.112.191
68	10.71.112.192/26	10.71.112.193 – 10.71.112.254	10.71.112.255
69	10.71.113.0/26	10.71.113.1 – 10.71.113.62	10.71.113.63
70	10.71.113.64/26	10.71.113.65 – 10.71.113.126	10.71.113.127
71	10.71.113.128/26	10.71.113.129 – 10.71.113.190	10.71.113.191
72	10.71.113.192/26	10.71.113.193 – 10.71.113.254	10.71.113.255
73	10.71.114.0/26	10.71.114.1 – 10.71.114.62	10.71.114.63
74	10.71.114.64/26	10.71.114.65 – 10.71.114.126	10.71.114.127
75	10.71.114.128/26	10.71.114.129 – 10.71.114.190	10.71.114.191
76	10.71.114.192/26	10.71.114.193 – 10.71.114.254	10.71.114.255
77	10.71.115.0/26	10.71.115.1 – 10.71.115.62	10.71.115.63
78	10.71.115.64/26	10.71.115.65 – 10.71.115.126	10.71.115.127
79	10.71.115.128/26	10.71.115.129 – 10.71.115.190	10.71.115.191
80	10.71.115.192/26	10.71.115.193 – 10.71.115.254	10.71.115.255
81	10.71.116.0/26	10.71.116.1 – 10.71.116.62	10.71.116.63
82	10.71.116.64/26	10.71.116.65 – 10.71.116.126	10.71.116.127
83	10.71.116.128/26	10.71.116.129 – 10.71.116.190	10.71.116.191
84	10.71.116.192/26	10.71.116.193 – 10.71.116.254	10.71.116.255
85	10.71.117.0/26	10.71.117.1 – 10.71.117.62	10.71.117.63
86	10.71.117.64/26	10.71.117.65 – 10.71.117.126	10.71.117.127
87	10.71.117.128/26	10.71.117.129 – 10.71.117.190	10.71.117.191
88	10.71.117.192/26	10.71.117.193 – 10.71.117.254	10.71.117.255
89	10.71.118.0/26	10.71.118.1 – 10.71.118.62	10.71.118.63
90	10.71.118.64/26	10.71.118.65 – 10.71.118.126	10.71.118.127
91	10.71.118.128/26	10.71.118.129 – 10.71.118.190	10.71.118.191
92	10.71.118.192/26	10.71.118.193 – 10.71.118.254	10.71.118.255
93	10.71.119.0/26	10.71.119.1 – 10.71.119.62	10.71.119.63
94	10.71.119.64/26	10.71.119.65 – 10.71.119.126	10.71.119.127
95	10.71.119.128/26	10.71.119.129 – 10.71.119.190	10.71.119.191
96	10.71.119.192/26	10.71.119.193 – 10.71.119.254	10.71.119.255
97	10.71.120.0/26	10.71.120.1 – 10.71.120.62	10.71.120.63
98	10.71.120.64/26	10.71.120.65 – 10.71.120.126	10.71.120.127
99	10.71.120.128/26	10.71.120.129 – 10.71.120.190	10.71.120.191
100	10.71.120.192/26	10.71.120.193 – 10.71.120.254	10.71.120.255
101	10.71.121.0/26	10.71.121.1 – 10.71.121.62	10.71.121.63
102	10.71.121.64/26	10.71.121.65 – 10.71.121.126	10.71.121.127
103	10.71.121.128/26	10.71.121.129 – 10.71.121.190	10.71.121.191
104	10.71.121.192/26	10.71.121.193 – 10.71.121.254	10.71.121.255
105	10.71.122.0/26	10.71.122.1 – 10.71.122.62	10.71.122.63
106	10.71.122.64/26	10.71.122.65 – 10.71.122.126	10.71.122.127
107	10.71.122.128/26	10.71.122.129 – 10.71.122.190	10.71.122.191
108	10.71.122.192/26	10.71.122.193 – 10.71.122.254	10.71.122.255
109	10.71.123.0/26	10.71.123.1 – 10.71.123.62	10.71.123.63
110	10.71.123.64/26	10.71.123.65 – 10.71.123.126	10.71.123.127
111	10.71.123.128/26	10.71.123.129 – 10.71.123.190	10.71.123.191
112	10.71.123.192/26	10.71.123.193 – 10.71.123.254	10.71.123.255
113	10.71.124.0/26	10.71.124.1 – 10.71.124.62	10.71.124.63
114	10.71.124.64/26	10.71.124.65 – 10.71.124.126	10.71.124.127
115	10.71.124.128/26	10.71.124.129 – 10.71.124.190	10.71.124.191
116	10.71.124.192/26	10.71.124.193 – 10.71.124.254	10.71.124.255
117	10.71.125.0/26	10.71.125.1 – 10.71.125.62	10.71.125.63
118	10.71.125.64/26	10.71.125.65 – 10.71.125.126	10.71.125.127
119	10.71.125.128/26	10.71.125.129 – 10.71.125.190	10.71.125.191
120	10.71.125.192/26	10.71.125.193 – 10.71.125.254	10.71.125.255
121	10.71.126.0/26	10.71.126.1 – 10.71.126.62	10.71.126.63
122	10.71.126.64/26	10.71.126.65 – 10.71.126.126	10.71.126.127
123	10.71.126.128/26	10.71.126.129 – 10.71.126.190	10.71.126.191
124	10.71.126.192/26	10.71.126.193 – 10.71.126.254	10.71.126.255
125	10.71.127.0/26	10.71.127.1 – 10.71.127.62	10.71.127.63
126	10.71.127.64/26	10.71.127.65 – 10.71.127.126	10.71.127.127
127	10.71.127.128/26	10.71.127.129 – 10.71.127.190	10.71.127.191
128	10.71.127.192/26	10.71.127.193 – 10.71.127.254	10.71.127.255

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 →