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)10.3.140.0/22

network10.3.140.0/22

broadcast10.3.143.255

first host10.3.140.1

last host10.3.143.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.140.0/22

address00001010.00000011.10001100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10001100.00000000

broadcast00001010.00000011.10001111.11111111

green = network part, grey = host part

hex0x0a038c00

decimal168004608

reverse dns0.140.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:8c00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.140.0/29	10.3.140.1 – 10.3.140.6	10.3.140.7
2	10.3.140.8/29	10.3.140.9 – 10.3.140.14	10.3.140.15
3	10.3.140.16/29	10.3.140.17 – 10.3.140.22	10.3.140.23
4	10.3.140.24/29	10.3.140.25 – 10.3.140.30	10.3.140.31
5	10.3.140.32/29	10.3.140.33 – 10.3.140.38	10.3.140.39
6	10.3.140.40/29	10.3.140.41 – 10.3.140.46	10.3.140.47
7	10.3.140.48/29	10.3.140.49 – 10.3.140.54	10.3.140.55
8	10.3.140.56/29	10.3.140.57 – 10.3.140.62	10.3.140.63
9	10.3.140.64/29	10.3.140.65 – 10.3.140.70	10.3.140.71
10	10.3.140.72/29	10.3.140.73 – 10.3.140.78	10.3.140.79
11	10.3.140.80/29	10.3.140.81 – 10.3.140.86	10.3.140.87
12	10.3.140.88/29	10.3.140.89 – 10.3.140.94	10.3.140.95
13	10.3.140.96/29	10.3.140.97 – 10.3.140.102	10.3.140.103
14	10.3.140.104/29	10.3.140.105 – 10.3.140.110	10.3.140.111
15	10.3.140.112/29	10.3.140.113 – 10.3.140.118	10.3.140.119
16	10.3.140.120/29	10.3.140.121 – 10.3.140.126	10.3.140.127
17	10.3.140.128/29	10.3.140.129 – 10.3.140.134	10.3.140.135
18	10.3.140.136/29	10.3.140.137 – 10.3.140.142	10.3.140.143
19	10.3.140.144/29	10.3.140.145 – 10.3.140.150	10.3.140.151
20	10.3.140.152/29	10.3.140.153 – 10.3.140.158	10.3.140.159
21	10.3.140.160/29	10.3.140.161 – 10.3.140.166	10.3.140.167
22	10.3.140.168/29	10.3.140.169 – 10.3.140.174	10.3.140.175
23	10.3.140.176/29	10.3.140.177 – 10.3.140.182	10.3.140.183
24	10.3.140.184/29	10.3.140.185 – 10.3.140.190	10.3.140.191
25	10.3.140.192/29	10.3.140.193 – 10.3.140.198	10.3.140.199
26	10.3.140.200/29	10.3.140.201 – 10.3.140.206	10.3.140.207
27	10.3.140.208/29	10.3.140.209 – 10.3.140.214	10.3.140.215
28	10.3.140.216/29	10.3.140.217 – 10.3.140.222	10.3.140.223
29	10.3.140.224/29	10.3.140.225 – 10.3.140.230	10.3.140.231
30	10.3.140.232/29	10.3.140.233 – 10.3.140.238	10.3.140.239
31	10.3.140.240/29	10.3.140.241 – 10.3.140.246	10.3.140.247
32	10.3.140.248/29	10.3.140.249 – 10.3.140.254	10.3.140.255
33	10.3.141.0/29	10.3.141.1 – 10.3.141.6	10.3.141.7
34	10.3.141.8/29	10.3.141.9 – 10.3.141.14	10.3.141.15
35	10.3.141.16/29	10.3.141.17 – 10.3.141.22	10.3.141.23
36	10.3.141.24/29	10.3.141.25 – 10.3.141.30	10.3.141.31
37	10.3.141.32/29	10.3.141.33 – 10.3.141.38	10.3.141.39
38	10.3.141.40/29	10.3.141.41 – 10.3.141.46	10.3.141.47
39	10.3.141.48/29	10.3.141.49 – 10.3.141.54	10.3.141.55
40	10.3.141.56/29	10.3.141.57 – 10.3.141.62	10.3.141.63
41	10.3.141.64/29	10.3.141.65 – 10.3.141.70	10.3.141.71
42	10.3.141.72/29	10.3.141.73 – 10.3.141.78	10.3.141.79
43	10.3.141.80/29	10.3.141.81 – 10.3.141.86	10.3.141.87
44	10.3.141.88/29	10.3.141.89 – 10.3.141.94	10.3.141.95
45	10.3.141.96/29	10.3.141.97 – 10.3.141.102	10.3.141.103
46	10.3.141.104/29	10.3.141.105 – 10.3.141.110	10.3.141.111
47	10.3.141.112/29	10.3.141.113 – 10.3.141.118	10.3.141.119
48	10.3.141.120/29	10.3.141.121 – 10.3.141.126	10.3.141.127
49	10.3.141.128/29	10.3.141.129 – 10.3.141.134	10.3.141.135
50	10.3.141.136/29	10.3.141.137 – 10.3.141.142	10.3.141.143
51	10.3.141.144/29	10.3.141.145 – 10.3.141.150	10.3.141.151
52	10.3.141.152/29	10.3.141.153 – 10.3.141.158	10.3.141.159
53	10.3.141.160/29	10.3.141.161 – 10.3.141.166	10.3.141.167
54	10.3.141.168/29	10.3.141.169 – 10.3.141.174	10.3.141.175
55	10.3.141.176/29	10.3.141.177 – 10.3.141.182	10.3.141.183
56	10.3.141.184/29	10.3.141.185 – 10.3.141.190	10.3.141.191
57	10.3.141.192/29	10.3.141.193 – 10.3.141.198	10.3.141.199
58	10.3.141.200/29	10.3.141.201 – 10.3.141.206	10.3.141.207
59	10.3.141.208/29	10.3.141.209 – 10.3.141.214	10.3.141.215
60	10.3.141.216/29	10.3.141.217 – 10.3.141.222	10.3.141.223
61	10.3.141.224/29	10.3.141.225 – 10.3.141.230	10.3.141.231
62	10.3.141.232/29	10.3.141.233 – 10.3.141.238	10.3.141.239
63	10.3.141.240/29	10.3.141.241 – 10.3.141.246	10.3.141.247
64	10.3.141.248/29	10.3.141.249 – 10.3.141.254	10.3.141.255
65	10.3.142.0/29	10.3.142.1 – 10.3.142.6	10.3.142.7
66	10.3.142.8/29	10.3.142.9 – 10.3.142.14	10.3.142.15
67	10.3.142.16/29	10.3.142.17 – 10.3.142.22	10.3.142.23
68	10.3.142.24/29	10.3.142.25 – 10.3.142.30	10.3.142.31
69	10.3.142.32/29	10.3.142.33 – 10.3.142.38	10.3.142.39
70	10.3.142.40/29	10.3.142.41 – 10.3.142.46	10.3.142.47
71	10.3.142.48/29	10.3.142.49 – 10.3.142.54	10.3.142.55
72	10.3.142.56/29	10.3.142.57 – 10.3.142.62	10.3.142.63
73	10.3.142.64/29	10.3.142.65 – 10.3.142.70	10.3.142.71
74	10.3.142.72/29	10.3.142.73 – 10.3.142.78	10.3.142.79
75	10.3.142.80/29	10.3.142.81 – 10.3.142.86	10.3.142.87
76	10.3.142.88/29	10.3.142.89 – 10.3.142.94	10.3.142.95
77	10.3.142.96/29	10.3.142.97 – 10.3.142.102	10.3.142.103
78	10.3.142.104/29	10.3.142.105 – 10.3.142.110	10.3.142.111
79	10.3.142.112/29	10.3.142.113 – 10.3.142.118	10.3.142.119
80	10.3.142.120/29	10.3.142.121 – 10.3.142.126	10.3.142.127
81	10.3.142.128/29	10.3.142.129 – 10.3.142.134	10.3.142.135
82	10.3.142.136/29	10.3.142.137 – 10.3.142.142	10.3.142.143
83	10.3.142.144/29	10.3.142.145 – 10.3.142.150	10.3.142.151
84	10.3.142.152/29	10.3.142.153 – 10.3.142.158	10.3.142.159
85	10.3.142.160/29	10.3.142.161 – 10.3.142.166	10.3.142.167
86	10.3.142.168/29	10.3.142.169 – 10.3.142.174	10.3.142.175
87	10.3.142.176/29	10.3.142.177 – 10.3.142.182	10.3.142.183
88	10.3.142.184/29	10.3.142.185 – 10.3.142.190	10.3.142.191
89	10.3.142.192/29	10.3.142.193 – 10.3.142.198	10.3.142.199
90	10.3.142.200/29	10.3.142.201 – 10.3.142.206	10.3.142.207
91	10.3.142.208/29	10.3.142.209 – 10.3.142.214	10.3.142.215
92	10.3.142.216/29	10.3.142.217 – 10.3.142.222	10.3.142.223
93	10.3.142.224/29	10.3.142.225 – 10.3.142.230	10.3.142.231
94	10.3.142.232/29	10.3.142.233 – 10.3.142.238	10.3.142.239
95	10.3.142.240/29	10.3.142.241 – 10.3.142.246	10.3.142.247
96	10.3.142.248/29	10.3.142.249 – 10.3.142.254	10.3.142.255
97	10.3.143.0/29	10.3.143.1 – 10.3.143.6	10.3.143.7
98	10.3.143.8/29	10.3.143.9 – 10.3.143.14	10.3.143.15
99	10.3.143.16/29	10.3.143.17 – 10.3.143.22	10.3.143.23
100	10.3.143.24/29	10.3.143.25 – 10.3.143.30	10.3.143.31
101	10.3.143.32/29	10.3.143.33 – 10.3.143.38	10.3.143.39
102	10.3.143.40/29	10.3.143.41 – 10.3.143.46	10.3.143.47
103	10.3.143.48/29	10.3.143.49 – 10.3.143.54	10.3.143.55
104	10.3.143.56/29	10.3.143.57 – 10.3.143.62	10.3.143.63
105	10.3.143.64/29	10.3.143.65 – 10.3.143.70	10.3.143.71
106	10.3.143.72/29	10.3.143.73 – 10.3.143.78	10.3.143.79
107	10.3.143.80/29	10.3.143.81 – 10.3.143.86	10.3.143.87
108	10.3.143.88/29	10.3.143.89 – 10.3.143.94	10.3.143.95
109	10.3.143.96/29	10.3.143.97 – 10.3.143.102	10.3.143.103
110	10.3.143.104/29	10.3.143.105 – 10.3.143.110	10.3.143.111
111	10.3.143.112/29	10.3.143.113 – 10.3.143.118	10.3.143.119
112	10.3.143.120/29	10.3.143.121 – 10.3.143.126	10.3.143.127
113	10.3.143.128/29	10.3.143.129 – 10.3.143.134	10.3.143.135
114	10.3.143.136/29	10.3.143.137 – 10.3.143.142	10.3.143.143
115	10.3.143.144/29	10.3.143.145 – 10.3.143.150	10.3.143.151
116	10.3.143.152/29	10.3.143.153 – 10.3.143.158	10.3.143.159
117	10.3.143.160/29	10.3.143.161 – 10.3.143.166	10.3.143.167
118	10.3.143.168/29	10.3.143.169 – 10.3.143.174	10.3.143.175
119	10.3.143.176/29	10.3.143.177 – 10.3.143.182	10.3.143.183
120	10.3.143.184/29	10.3.143.185 – 10.3.143.190	10.3.143.191
121	10.3.143.192/29	10.3.143.193 – 10.3.143.198	10.3.143.199
122	10.3.143.200/29	10.3.143.201 – 10.3.143.206	10.3.143.207
123	10.3.143.208/29	10.3.143.209 – 10.3.143.214	10.3.143.215
124	10.3.143.216/29	10.3.143.217 – 10.3.143.222	10.3.143.223
125	10.3.143.224/29	10.3.143.225 – 10.3.143.230	10.3.143.231
126	10.3.143.232/29	10.3.143.233 – 10.3.143.238	10.3.143.239
127	10.3.143.240/29	10.3.143.241 – 10.3.143.246	10.3.143.247
128	10.3.143.248/29	10.3.143.249 – 10.3.143.254	10.3.143.255

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 /22
/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	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →