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)10.3.188.0/22

network10.3.188.0/22

broadcast10.3.191.255

first host10.3.188.1

last host10.3.191.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.188.0/22

address00001010.00000011.10111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10111100.00000000

broadcast00001010.00000011.10111111.11111111

green = network part, grey = host part

hex0x0a03bc00

decimal168016896

reverse dns0.188.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:bc00

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.188.0/29	10.3.188.1 – 10.3.188.6	10.3.188.7
2	10.3.188.8/29	10.3.188.9 – 10.3.188.14	10.3.188.15
3	10.3.188.16/29	10.3.188.17 – 10.3.188.22	10.3.188.23
4	10.3.188.24/29	10.3.188.25 – 10.3.188.30	10.3.188.31
5	10.3.188.32/29	10.3.188.33 – 10.3.188.38	10.3.188.39
6	10.3.188.40/29	10.3.188.41 – 10.3.188.46	10.3.188.47
7	10.3.188.48/29	10.3.188.49 – 10.3.188.54	10.3.188.55
8	10.3.188.56/29	10.3.188.57 – 10.3.188.62	10.3.188.63
9	10.3.188.64/29	10.3.188.65 – 10.3.188.70	10.3.188.71
10	10.3.188.72/29	10.3.188.73 – 10.3.188.78	10.3.188.79
11	10.3.188.80/29	10.3.188.81 – 10.3.188.86	10.3.188.87
12	10.3.188.88/29	10.3.188.89 – 10.3.188.94	10.3.188.95
13	10.3.188.96/29	10.3.188.97 – 10.3.188.102	10.3.188.103
14	10.3.188.104/29	10.3.188.105 – 10.3.188.110	10.3.188.111
15	10.3.188.112/29	10.3.188.113 – 10.3.188.118	10.3.188.119
16	10.3.188.120/29	10.3.188.121 – 10.3.188.126	10.3.188.127
17	10.3.188.128/29	10.3.188.129 – 10.3.188.134	10.3.188.135
18	10.3.188.136/29	10.3.188.137 – 10.3.188.142	10.3.188.143
19	10.3.188.144/29	10.3.188.145 – 10.3.188.150	10.3.188.151
20	10.3.188.152/29	10.3.188.153 – 10.3.188.158	10.3.188.159
21	10.3.188.160/29	10.3.188.161 – 10.3.188.166	10.3.188.167
22	10.3.188.168/29	10.3.188.169 – 10.3.188.174	10.3.188.175
23	10.3.188.176/29	10.3.188.177 – 10.3.188.182	10.3.188.183
24	10.3.188.184/29	10.3.188.185 – 10.3.188.190	10.3.188.191
25	10.3.188.192/29	10.3.188.193 – 10.3.188.198	10.3.188.199
26	10.3.188.200/29	10.3.188.201 – 10.3.188.206	10.3.188.207
27	10.3.188.208/29	10.3.188.209 – 10.3.188.214	10.3.188.215
28	10.3.188.216/29	10.3.188.217 – 10.3.188.222	10.3.188.223
29	10.3.188.224/29	10.3.188.225 – 10.3.188.230	10.3.188.231
30	10.3.188.232/29	10.3.188.233 – 10.3.188.238	10.3.188.239
31	10.3.188.240/29	10.3.188.241 – 10.3.188.246	10.3.188.247
32	10.3.188.248/29	10.3.188.249 – 10.3.188.254	10.3.188.255
33	10.3.189.0/29	10.3.189.1 – 10.3.189.6	10.3.189.7
34	10.3.189.8/29	10.3.189.9 – 10.3.189.14	10.3.189.15
35	10.3.189.16/29	10.3.189.17 – 10.3.189.22	10.3.189.23
36	10.3.189.24/29	10.3.189.25 – 10.3.189.30	10.3.189.31
37	10.3.189.32/29	10.3.189.33 – 10.3.189.38	10.3.189.39
38	10.3.189.40/29	10.3.189.41 – 10.3.189.46	10.3.189.47
39	10.3.189.48/29	10.3.189.49 – 10.3.189.54	10.3.189.55
40	10.3.189.56/29	10.3.189.57 – 10.3.189.62	10.3.189.63
41	10.3.189.64/29	10.3.189.65 – 10.3.189.70	10.3.189.71
42	10.3.189.72/29	10.3.189.73 – 10.3.189.78	10.3.189.79
43	10.3.189.80/29	10.3.189.81 – 10.3.189.86	10.3.189.87
44	10.3.189.88/29	10.3.189.89 – 10.3.189.94	10.3.189.95
45	10.3.189.96/29	10.3.189.97 – 10.3.189.102	10.3.189.103
46	10.3.189.104/29	10.3.189.105 – 10.3.189.110	10.3.189.111
47	10.3.189.112/29	10.3.189.113 – 10.3.189.118	10.3.189.119
48	10.3.189.120/29	10.3.189.121 – 10.3.189.126	10.3.189.127
49	10.3.189.128/29	10.3.189.129 – 10.3.189.134	10.3.189.135
50	10.3.189.136/29	10.3.189.137 – 10.3.189.142	10.3.189.143
51	10.3.189.144/29	10.3.189.145 – 10.3.189.150	10.3.189.151
52	10.3.189.152/29	10.3.189.153 – 10.3.189.158	10.3.189.159
53	10.3.189.160/29	10.3.189.161 – 10.3.189.166	10.3.189.167
54	10.3.189.168/29	10.3.189.169 – 10.3.189.174	10.3.189.175
55	10.3.189.176/29	10.3.189.177 – 10.3.189.182	10.3.189.183
56	10.3.189.184/29	10.3.189.185 – 10.3.189.190	10.3.189.191
57	10.3.189.192/29	10.3.189.193 – 10.3.189.198	10.3.189.199
58	10.3.189.200/29	10.3.189.201 – 10.3.189.206	10.3.189.207
59	10.3.189.208/29	10.3.189.209 – 10.3.189.214	10.3.189.215
60	10.3.189.216/29	10.3.189.217 – 10.3.189.222	10.3.189.223
61	10.3.189.224/29	10.3.189.225 – 10.3.189.230	10.3.189.231
62	10.3.189.232/29	10.3.189.233 – 10.3.189.238	10.3.189.239
63	10.3.189.240/29	10.3.189.241 – 10.3.189.246	10.3.189.247
64	10.3.189.248/29	10.3.189.249 – 10.3.189.254	10.3.189.255
65	10.3.190.0/29	10.3.190.1 – 10.3.190.6	10.3.190.7
66	10.3.190.8/29	10.3.190.9 – 10.3.190.14	10.3.190.15
67	10.3.190.16/29	10.3.190.17 – 10.3.190.22	10.3.190.23
68	10.3.190.24/29	10.3.190.25 – 10.3.190.30	10.3.190.31
69	10.3.190.32/29	10.3.190.33 – 10.3.190.38	10.3.190.39
70	10.3.190.40/29	10.3.190.41 – 10.3.190.46	10.3.190.47
71	10.3.190.48/29	10.3.190.49 – 10.3.190.54	10.3.190.55
72	10.3.190.56/29	10.3.190.57 – 10.3.190.62	10.3.190.63
73	10.3.190.64/29	10.3.190.65 – 10.3.190.70	10.3.190.71
74	10.3.190.72/29	10.3.190.73 – 10.3.190.78	10.3.190.79
75	10.3.190.80/29	10.3.190.81 – 10.3.190.86	10.3.190.87
76	10.3.190.88/29	10.3.190.89 – 10.3.190.94	10.3.190.95
77	10.3.190.96/29	10.3.190.97 – 10.3.190.102	10.3.190.103
78	10.3.190.104/29	10.3.190.105 – 10.3.190.110	10.3.190.111
79	10.3.190.112/29	10.3.190.113 – 10.3.190.118	10.3.190.119
80	10.3.190.120/29	10.3.190.121 – 10.3.190.126	10.3.190.127
81	10.3.190.128/29	10.3.190.129 – 10.3.190.134	10.3.190.135
82	10.3.190.136/29	10.3.190.137 – 10.3.190.142	10.3.190.143
83	10.3.190.144/29	10.3.190.145 – 10.3.190.150	10.3.190.151
84	10.3.190.152/29	10.3.190.153 – 10.3.190.158	10.3.190.159
85	10.3.190.160/29	10.3.190.161 – 10.3.190.166	10.3.190.167
86	10.3.190.168/29	10.3.190.169 – 10.3.190.174	10.3.190.175
87	10.3.190.176/29	10.3.190.177 – 10.3.190.182	10.3.190.183
88	10.3.190.184/29	10.3.190.185 – 10.3.190.190	10.3.190.191
89	10.3.190.192/29	10.3.190.193 – 10.3.190.198	10.3.190.199
90	10.3.190.200/29	10.3.190.201 – 10.3.190.206	10.3.190.207
91	10.3.190.208/29	10.3.190.209 – 10.3.190.214	10.3.190.215
92	10.3.190.216/29	10.3.190.217 – 10.3.190.222	10.3.190.223
93	10.3.190.224/29	10.3.190.225 – 10.3.190.230	10.3.190.231
94	10.3.190.232/29	10.3.190.233 – 10.3.190.238	10.3.190.239
95	10.3.190.240/29	10.3.190.241 – 10.3.190.246	10.3.190.247
96	10.3.190.248/29	10.3.190.249 – 10.3.190.254	10.3.190.255
97	10.3.191.0/29	10.3.191.1 – 10.3.191.6	10.3.191.7
98	10.3.191.8/29	10.3.191.9 – 10.3.191.14	10.3.191.15
99	10.3.191.16/29	10.3.191.17 – 10.3.191.22	10.3.191.23
100	10.3.191.24/29	10.3.191.25 – 10.3.191.30	10.3.191.31
101	10.3.191.32/29	10.3.191.33 – 10.3.191.38	10.3.191.39
102	10.3.191.40/29	10.3.191.41 – 10.3.191.46	10.3.191.47
103	10.3.191.48/29	10.3.191.49 – 10.3.191.54	10.3.191.55
104	10.3.191.56/29	10.3.191.57 – 10.3.191.62	10.3.191.63
105	10.3.191.64/29	10.3.191.65 – 10.3.191.70	10.3.191.71
106	10.3.191.72/29	10.3.191.73 – 10.3.191.78	10.3.191.79
107	10.3.191.80/29	10.3.191.81 – 10.3.191.86	10.3.191.87
108	10.3.191.88/29	10.3.191.89 – 10.3.191.94	10.3.191.95
109	10.3.191.96/29	10.3.191.97 – 10.3.191.102	10.3.191.103
110	10.3.191.104/29	10.3.191.105 – 10.3.191.110	10.3.191.111
111	10.3.191.112/29	10.3.191.113 – 10.3.191.118	10.3.191.119
112	10.3.191.120/29	10.3.191.121 – 10.3.191.126	10.3.191.127
113	10.3.191.128/29	10.3.191.129 – 10.3.191.134	10.3.191.135
114	10.3.191.136/29	10.3.191.137 – 10.3.191.142	10.3.191.143
115	10.3.191.144/29	10.3.191.145 – 10.3.191.150	10.3.191.151
116	10.3.191.152/29	10.3.191.153 – 10.3.191.158	10.3.191.159
117	10.3.191.160/29	10.3.191.161 – 10.3.191.166	10.3.191.167
118	10.3.191.168/29	10.3.191.169 – 10.3.191.174	10.3.191.175
119	10.3.191.176/29	10.3.191.177 – 10.3.191.182	10.3.191.183
120	10.3.191.184/29	10.3.191.185 – 10.3.191.190	10.3.191.191
121	10.3.191.192/29	10.3.191.193 – 10.3.191.198	10.3.191.199
122	10.3.191.200/29	10.3.191.201 – 10.3.191.206	10.3.191.207
123	10.3.191.208/29	10.3.191.209 – 10.3.191.214	10.3.191.215
124	10.3.191.216/29	10.3.191.217 – 10.3.191.222	10.3.191.223
125	10.3.191.224/29	10.3.191.225 – 10.3.191.230	10.3.191.231
126	10.3.191.232/29	10.3.191.233 – 10.3.191.238	10.3.191.239
127	10.3.191.240/29	10.3.191.241 – 10.3.191.246	10.3.191.247
128	10.3.191.248/29	10.3.191.249 – 10.3.191.254	10.3.191.255

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 /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 →