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)10.3.208.0/22

network10.3.208.0/22

broadcast10.3.211.255

first host10.3.208.1

last host10.3.211.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.208.0/22

address00001010.00000011.11010000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.11010000.00000000

broadcast00001010.00000011.11010011.11111111

green = network part, grey = host part

hex0x0a03d000

decimal168022016

reverse dns0.208.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:d000

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.208.0/29	10.3.208.1 – 10.3.208.6	10.3.208.7
2	10.3.208.8/29	10.3.208.9 – 10.3.208.14	10.3.208.15
3	10.3.208.16/29	10.3.208.17 – 10.3.208.22	10.3.208.23
4	10.3.208.24/29	10.3.208.25 – 10.3.208.30	10.3.208.31
5	10.3.208.32/29	10.3.208.33 – 10.3.208.38	10.3.208.39
6	10.3.208.40/29	10.3.208.41 – 10.3.208.46	10.3.208.47
7	10.3.208.48/29	10.3.208.49 – 10.3.208.54	10.3.208.55
8	10.3.208.56/29	10.3.208.57 – 10.3.208.62	10.3.208.63
9	10.3.208.64/29	10.3.208.65 – 10.3.208.70	10.3.208.71
10	10.3.208.72/29	10.3.208.73 – 10.3.208.78	10.3.208.79
11	10.3.208.80/29	10.3.208.81 – 10.3.208.86	10.3.208.87
12	10.3.208.88/29	10.3.208.89 – 10.3.208.94	10.3.208.95
13	10.3.208.96/29	10.3.208.97 – 10.3.208.102	10.3.208.103
14	10.3.208.104/29	10.3.208.105 – 10.3.208.110	10.3.208.111
15	10.3.208.112/29	10.3.208.113 – 10.3.208.118	10.3.208.119
16	10.3.208.120/29	10.3.208.121 – 10.3.208.126	10.3.208.127
17	10.3.208.128/29	10.3.208.129 – 10.3.208.134	10.3.208.135
18	10.3.208.136/29	10.3.208.137 – 10.3.208.142	10.3.208.143
19	10.3.208.144/29	10.3.208.145 – 10.3.208.150	10.3.208.151
20	10.3.208.152/29	10.3.208.153 – 10.3.208.158	10.3.208.159
21	10.3.208.160/29	10.3.208.161 – 10.3.208.166	10.3.208.167
22	10.3.208.168/29	10.3.208.169 – 10.3.208.174	10.3.208.175
23	10.3.208.176/29	10.3.208.177 – 10.3.208.182	10.3.208.183
24	10.3.208.184/29	10.3.208.185 – 10.3.208.190	10.3.208.191
25	10.3.208.192/29	10.3.208.193 – 10.3.208.198	10.3.208.199
26	10.3.208.200/29	10.3.208.201 – 10.3.208.206	10.3.208.207
27	10.3.208.208/29	10.3.208.209 – 10.3.208.214	10.3.208.215
28	10.3.208.216/29	10.3.208.217 – 10.3.208.222	10.3.208.223
29	10.3.208.224/29	10.3.208.225 – 10.3.208.230	10.3.208.231
30	10.3.208.232/29	10.3.208.233 – 10.3.208.238	10.3.208.239
31	10.3.208.240/29	10.3.208.241 – 10.3.208.246	10.3.208.247
32	10.3.208.248/29	10.3.208.249 – 10.3.208.254	10.3.208.255
33	10.3.209.0/29	10.3.209.1 – 10.3.209.6	10.3.209.7
34	10.3.209.8/29	10.3.209.9 – 10.3.209.14	10.3.209.15
35	10.3.209.16/29	10.3.209.17 – 10.3.209.22	10.3.209.23
36	10.3.209.24/29	10.3.209.25 – 10.3.209.30	10.3.209.31
37	10.3.209.32/29	10.3.209.33 – 10.3.209.38	10.3.209.39
38	10.3.209.40/29	10.3.209.41 – 10.3.209.46	10.3.209.47
39	10.3.209.48/29	10.3.209.49 – 10.3.209.54	10.3.209.55
40	10.3.209.56/29	10.3.209.57 – 10.3.209.62	10.3.209.63
41	10.3.209.64/29	10.3.209.65 – 10.3.209.70	10.3.209.71
42	10.3.209.72/29	10.3.209.73 – 10.3.209.78	10.3.209.79
43	10.3.209.80/29	10.3.209.81 – 10.3.209.86	10.3.209.87
44	10.3.209.88/29	10.3.209.89 – 10.3.209.94	10.3.209.95
45	10.3.209.96/29	10.3.209.97 – 10.3.209.102	10.3.209.103
46	10.3.209.104/29	10.3.209.105 – 10.3.209.110	10.3.209.111
47	10.3.209.112/29	10.3.209.113 – 10.3.209.118	10.3.209.119
48	10.3.209.120/29	10.3.209.121 – 10.3.209.126	10.3.209.127
49	10.3.209.128/29	10.3.209.129 – 10.3.209.134	10.3.209.135
50	10.3.209.136/29	10.3.209.137 – 10.3.209.142	10.3.209.143
51	10.3.209.144/29	10.3.209.145 – 10.3.209.150	10.3.209.151
52	10.3.209.152/29	10.3.209.153 – 10.3.209.158	10.3.209.159
53	10.3.209.160/29	10.3.209.161 – 10.3.209.166	10.3.209.167
54	10.3.209.168/29	10.3.209.169 – 10.3.209.174	10.3.209.175
55	10.3.209.176/29	10.3.209.177 – 10.3.209.182	10.3.209.183
56	10.3.209.184/29	10.3.209.185 – 10.3.209.190	10.3.209.191
57	10.3.209.192/29	10.3.209.193 – 10.3.209.198	10.3.209.199
58	10.3.209.200/29	10.3.209.201 – 10.3.209.206	10.3.209.207
59	10.3.209.208/29	10.3.209.209 – 10.3.209.214	10.3.209.215
60	10.3.209.216/29	10.3.209.217 – 10.3.209.222	10.3.209.223
61	10.3.209.224/29	10.3.209.225 – 10.3.209.230	10.3.209.231
62	10.3.209.232/29	10.3.209.233 – 10.3.209.238	10.3.209.239
63	10.3.209.240/29	10.3.209.241 – 10.3.209.246	10.3.209.247
64	10.3.209.248/29	10.3.209.249 – 10.3.209.254	10.3.209.255
65	10.3.210.0/29	10.3.210.1 – 10.3.210.6	10.3.210.7
66	10.3.210.8/29	10.3.210.9 – 10.3.210.14	10.3.210.15
67	10.3.210.16/29	10.3.210.17 – 10.3.210.22	10.3.210.23
68	10.3.210.24/29	10.3.210.25 – 10.3.210.30	10.3.210.31
69	10.3.210.32/29	10.3.210.33 – 10.3.210.38	10.3.210.39
70	10.3.210.40/29	10.3.210.41 – 10.3.210.46	10.3.210.47
71	10.3.210.48/29	10.3.210.49 – 10.3.210.54	10.3.210.55
72	10.3.210.56/29	10.3.210.57 – 10.3.210.62	10.3.210.63
73	10.3.210.64/29	10.3.210.65 – 10.3.210.70	10.3.210.71
74	10.3.210.72/29	10.3.210.73 – 10.3.210.78	10.3.210.79
75	10.3.210.80/29	10.3.210.81 – 10.3.210.86	10.3.210.87
76	10.3.210.88/29	10.3.210.89 – 10.3.210.94	10.3.210.95
77	10.3.210.96/29	10.3.210.97 – 10.3.210.102	10.3.210.103
78	10.3.210.104/29	10.3.210.105 – 10.3.210.110	10.3.210.111
79	10.3.210.112/29	10.3.210.113 – 10.3.210.118	10.3.210.119
80	10.3.210.120/29	10.3.210.121 – 10.3.210.126	10.3.210.127
81	10.3.210.128/29	10.3.210.129 – 10.3.210.134	10.3.210.135
82	10.3.210.136/29	10.3.210.137 – 10.3.210.142	10.3.210.143
83	10.3.210.144/29	10.3.210.145 – 10.3.210.150	10.3.210.151
84	10.3.210.152/29	10.3.210.153 – 10.3.210.158	10.3.210.159
85	10.3.210.160/29	10.3.210.161 – 10.3.210.166	10.3.210.167
86	10.3.210.168/29	10.3.210.169 – 10.3.210.174	10.3.210.175
87	10.3.210.176/29	10.3.210.177 – 10.3.210.182	10.3.210.183
88	10.3.210.184/29	10.3.210.185 – 10.3.210.190	10.3.210.191
89	10.3.210.192/29	10.3.210.193 – 10.3.210.198	10.3.210.199
90	10.3.210.200/29	10.3.210.201 – 10.3.210.206	10.3.210.207
91	10.3.210.208/29	10.3.210.209 – 10.3.210.214	10.3.210.215
92	10.3.210.216/29	10.3.210.217 – 10.3.210.222	10.3.210.223
93	10.3.210.224/29	10.3.210.225 – 10.3.210.230	10.3.210.231
94	10.3.210.232/29	10.3.210.233 – 10.3.210.238	10.3.210.239
95	10.3.210.240/29	10.3.210.241 – 10.3.210.246	10.3.210.247
96	10.3.210.248/29	10.3.210.249 – 10.3.210.254	10.3.210.255
97	10.3.211.0/29	10.3.211.1 – 10.3.211.6	10.3.211.7
98	10.3.211.8/29	10.3.211.9 – 10.3.211.14	10.3.211.15
99	10.3.211.16/29	10.3.211.17 – 10.3.211.22	10.3.211.23
100	10.3.211.24/29	10.3.211.25 – 10.3.211.30	10.3.211.31
101	10.3.211.32/29	10.3.211.33 – 10.3.211.38	10.3.211.39
102	10.3.211.40/29	10.3.211.41 – 10.3.211.46	10.3.211.47
103	10.3.211.48/29	10.3.211.49 – 10.3.211.54	10.3.211.55
104	10.3.211.56/29	10.3.211.57 – 10.3.211.62	10.3.211.63
105	10.3.211.64/29	10.3.211.65 – 10.3.211.70	10.3.211.71
106	10.3.211.72/29	10.3.211.73 – 10.3.211.78	10.3.211.79
107	10.3.211.80/29	10.3.211.81 – 10.3.211.86	10.3.211.87
108	10.3.211.88/29	10.3.211.89 – 10.3.211.94	10.3.211.95
109	10.3.211.96/29	10.3.211.97 – 10.3.211.102	10.3.211.103
110	10.3.211.104/29	10.3.211.105 – 10.3.211.110	10.3.211.111
111	10.3.211.112/29	10.3.211.113 – 10.3.211.118	10.3.211.119
112	10.3.211.120/29	10.3.211.121 – 10.3.211.126	10.3.211.127
113	10.3.211.128/29	10.3.211.129 – 10.3.211.134	10.3.211.135
114	10.3.211.136/29	10.3.211.137 – 10.3.211.142	10.3.211.143
115	10.3.211.144/29	10.3.211.145 – 10.3.211.150	10.3.211.151
116	10.3.211.152/29	10.3.211.153 – 10.3.211.158	10.3.211.159
117	10.3.211.160/29	10.3.211.161 – 10.3.211.166	10.3.211.167
118	10.3.211.168/29	10.3.211.169 – 10.3.211.174	10.3.211.175
119	10.3.211.176/29	10.3.211.177 – 10.3.211.182	10.3.211.183
120	10.3.211.184/29	10.3.211.185 – 10.3.211.190	10.3.211.191
121	10.3.211.192/29	10.3.211.193 – 10.3.211.198	10.3.211.199
122	10.3.211.200/29	10.3.211.201 – 10.3.211.206	10.3.211.207
123	10.3.211.208/29	10.3.211.209 – 10.3.211.214	10.3.211.215
124	10.3.211.216/29	10.3.211.217 – 10.3.211.222	10.3.211.223
125	10.3.211.224/29	10.3.211.225 – 10.3.211.230	10.3.211.231
126	10.3.211.232/29	10.3.211.233 – 10.3.211.238	10.3.211.239
127	10.3.211.240/29	10.3.211.241 – 10.3.211.246	10.3.211.247
128	10.3.211.248/29	10.3.211.249 – 10.3.211.254	10.3.211.255

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 →