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)10.3.164.0/22

network10.3.164.0/22

broadcast10.3.167.255

first host10.3.164.1

last host10.3.167.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.164.0/22

address00001010.00000011.10100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10100100.00000000

broadcast00001010.00000011.10100111.11111111

green = network part, grey = host part

hex0x0a03a400

decimal168010752

reverse dns0.164.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:a400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.164.0/29	10.3.164.1 – 10.3.164.6	10.3.164.7
2	10.3.164.8/29	10.3.164.9 – 10.3.164.14	10.3.164.15
3	10.3.164.16/29	10.3.164.17 – 10.3.164.22	10.3.164.23
4	10.3.164.24/29	10.3.164.25 – 10.3.164.30	10.3.164.31
5	10.3.164.32/29	10.3.164.33 – 10.3.164.38	10.3.164.39
6	10.3.164.40/29	10.3.164.41 – 10.3.164.46	10.3.164.47
7	10.3.164.48/29	10.3.164.49 – 10.3.164.54	10.3.164.55
8	10.3.164.56/29	10.3.164.57 – 10.3.164.62	10.3.164.63
9	10.3.164.64/29	10.3.164.65 – 10.3.164.70	10.3.164.71
10	10.3.164.72/29	10.3.164.73 – 10.3.164.78	10.3.164.79
11	10.3.164.80/29	10.3.164.81 – 10.3.164.86	10.3.164.87
12	10.3.164.88/29	10.3.164.89 – 10.3.164.94	10.3.164.95
13	10.3.164.96/29	10.3.164.97 – 10.3.164.102	10.3.164.103
14	10.3.164.104/29	10.3.164.105 – 10.3.164.110	10.3.164.111
15	10.3.164.112/29	10.3.164.113 – 10.3.164.118	10.3.164.119
16	10.3.164.120/29	10.3.164.121 – 10.3.164.126	10.3.164.127
17	10.3.164.128/29	10.3.164.129 – 10.3.164.134	10.3.164.135
18	10.3.164.136/29	10.3.164.137 – 10.3.164.142	10.3.164.143
19	10.3.164.144/29	10.3.164.145 – 10.3.164.150	10.3.164.151
20	10.3.164.152/29	10.3.164.153 – 10.3.164.158	10.3.164.159
21	10.3.164.160/29	10.3.164.161 – 10.3.164.166	10.3.164.167
22	10.3.164.168/29	10.3.164.169 – 10.3.164.174	10.3.164.175
23	10.3.164.176/29	10.3.164.177 – 10.3.164.182	10.3.164.183
24	10.3.164.184/29	10.3.164.185 – 10.3.164.190	10.3.164.191
25	10.3.164.192/29	10.3.164.193 – 10.3.164.198	10.3.164.199
26	10.3.164.200/29	10.3.164.201 – 10.3.164.206	10.3.164.207
27	10.3.164.208/29	10.3.164.209 – 10.3.164.214	10.3.164.215
28	10.3.164.216/29	10.3.164.217 – 10.3.164.222	10.3.164.223
29	10.3.164.224/29	10.3.164.225 – 10.3.164.230	10.3.164.231
30	10.3.164.232/29	10.3.164.233 – 10.3.164.238	10.3.164.239
31	10.3.164.240/29	10.3.164.241 – 10.3.164.246	10.3.164.247
32	10.3.164.248/29	10.3.164.249 – 10.3.164.254	10.3.164.255
33	10.3.165.0/29	10.3.165.1 – 10.3.165.6	10.3.165.7
34	10.3.165.8/29	10.3.165.9 – 10.3.165.14	10.3.165.15
35	10.3.165.16/29	10.3.165.17 – 10.3.165.22	10.3.165.23
36	10.3.165.24/29	10.3.165.25 – 10.3.165.30	10.3.165.31
37	10.3.165.32/29	10.3.165.33 – 10.3.165.38	10.3.165.39
38	10.3.165.40/29	10.3.165.41 – 10.3.165.46	10.3.165.47
39	10.3.165.48/29	10.3.165.49 – 10.3.165.54	10.3.165.55
40	10.3.165.56/29	10.3.165.57 – 10.3.165.62	10.3.165.63
41	10.3.165.64/29	10.3.165.65 – 10.3.165.70	10.3.165.71
42	10.3.165.72/29	10.3.165.73 – 10.3.165.78	10.3.165.79
43	10.3.165.80/29	10.3.165.81 – 10.3.165.86	10.3.165.87
44	10.3.165.88/29	10.3.165.89 – 10.3.165.94	10.3.165.95
45	10.3.165.96/29	10.3.165.97 – 10.3.165.102	10.3.165.103
46	10.3.165.104/29	10.3.165.105 – 10.3.165.110	10.3.165.111
47	10.3.165.112/29	10.3.165.113 – 10.3.165.118	10.3.165.119
48	10.3.165.120/29	10.3.165.121 – 10.3.165.126	10.3.165.127
49	10.3.165.128/29	10.3.165.129 – 10.3.165.134	10.3.165.135
50	10.3.165.136/29	10.3.165.137 – 10.3.165.142	10.3.165.143
51	10.3.165.144/29	10.3.165.145 – 10.3.165.150	10.3.165.151
52	10.3.165.152/29	10.3.165.153 – 10.3.165.158	10.3.165.159
53	10.3.165.160/29	10.3.165.161 – 10.3.165.166	10.3.165.167
54	10.3.165.168/29	10.3.165.169 – 10.3.165.174	10.3.165.175
55	10.3.165.176/29	10.3.165.177 – 10.3.165.182	10.3.165.183
56	10.3.165.184/29	10.3.165.185 – 10.3.165.190	10.3.165.191
57	10.3.165.192/29	10.3.165.193 – 10.3.165.198	10.3.165.199
58	10.3.165.200/29	10.3.165.201 – 10.3.165.206	10.3.165.207
59	10.3.165.208/29	10.3.165.209 – 10.3.165.214	10.3.165.215
60	10.3.165.216/29	10.3.165.217 – 10.3.165.222	10.3.165.223
61	10.3.165.224/29	10.3.165.225 – 10.3.165.230	10.3.165.231
62	10.3.165.232/29	10.3.165.233 – 10.3.165.238	10.3.165.239
63	10.3.165.240/29	10.3.165.241 – 10.3.165.246	10.3.165.247
64	10.3.165.248/29	10.3.165.249 – 10.3.165.254	10.3.165.255
65	10.3.166.0/29	10.3.166.1 – 10.3.166.6	10.3.166.7
66	10.3.166.8/29	10.3.166.9 – 10.3.166.14	10.3.166.15
67	10.3.166.16/29	10.3.166.17 – 10.3.166.22	10.3.166.23
68	10.3.166.24/29	10.3.166.25 – 10.3.166.30	10.3.166.31
69	10.3.166.32/29	10.3.166.33 – 10.3.166.38	10.3.166.39
70	10.3.166.40/29	10.3.166.41 – 10.3.166.46	10.3.166.47
71	10.3.166.48/29	10.3.166.49 – 10.3.166.54	10.3.166.55
72	10.3.166.56/29	10.3.166.57 – 10.3.166.62	10.3.166.63
73	10.3.166.64/29	10.3.166.65 – 10.3.166.70	10.3.166.71
74	10.3.166.72/29	10.3.166.73 – 10.3.166.78	10.3.166.79
75	10.3.166.80/29	10.3.166.81 – 10.3.166.86	10.3.166.87
76	10.3.166.88/29	10.3.166.89 – 10.3.166.94	10.3.166.95
77	10.3.166.96/29	10.3.166.97 – 10.3.166.102	10.3.166.103
78	10.3.166.104/29	10.3.166.105 – 10.3.166.110	10.3.166.111
79	10.3.166.112/29	10.3.166.113 – 10.3.166.118	10.3.166.119
80	10.3.166.120/29	10.3.166.121 – 10.3.166.126	10.3.166.127
81	10.3.166.128/29	10.3.166.129 – 10.3.166.134	10.3.166.135
82	10.3.166.136/29	10.3.166.137 – 10.3.166.142	10.3.166.143
83	10.3.166.144/29	10.3.166.145 – 10.3.166.150	10.3.166.151
84	10.3.166.152/29	10.3.166.153 – 10.3.166.158	10.3.166.159
85	10.3.166.160/29	10.3.166.161 – 10.3.166.166	10.3.166.167
86	10.3.166.168/29	10.3.166.169 – 10.3.166.174	10.3.166.175
87	10.3.166.176/29	10.3.166.177 – 10.3.166.182	10.3.166.183
88	10.3.166.184/29	10.3.166.185 – 10.3.166.190	10.3.166.191
89	10.3.166.192/29	10.3.166.193 – 10.3.166.198	10.3.166.199
90	10.3.166.200/29	10.3.166.201 – 10.3.166.206	10.3.166.207
91	10.3.166.208/29	10.3.166.209 – 10.3.166.214	10.3.166.215
92	10.3.166.216/29	10.3.166.217 – 10.3.166.222	10.3.166.223
93	10.3.166.224/29	10.3.166.225 – 10.3.166.230	10.3.166.231
94	10.3.166.232/29	10.3.166.233 – 10.3.166.238	10.3.166.239
95	10.3.166.240/29	10.3.166.241 – 10.3.166.246	10.3.166.247
96	10.3.166.248/29	10.3.166.249 – 10.3.166.254	10.3.166.255
97	10.3.167.0/29	10.3.167.1 – 10.3.167.6	10.3.167.7
98	10.3.167.8/29	10.3.167.9 – 10.3.167.14	10.3.167.15
99	10.3.167.16/29	10.3.167.17 – 10.3.167.22	10.3.167.23
100	10.3.167.24/29	10.3.167.25 – 10.3.167.30	10.3.167.31
101	10.3.167.32/29	10.3.167.33 – 10.3.167.38	10.3.167.39
102	10.3.167.40/29	10.3.167.41 – 10.3.167.46	10.3.167.47
103	10.3.167.48/29	10.3.167.49 – 10.3.167.54	10.3.167.55
104	10.3.167.56/29	10.3.167.57 – 10.3.167.62	10.3.167.63
105	10.3.167.64/29	10.3.167.65 – 10.3.167.70	10.3.167.71
106	10.3.167.72/29	10.3.167.73 – 10.3.167.78	10.3.167.79
107	10.3.167.80/29	10.3.167.81 – 10.3.167.86	10.3.167.87
108	10.3.167.88/29	10.3.167.89 – 10.3.167.94	10.3.167.95
109	10.3.167.96/29	10.3.167.97 – 10.3.167.102	10.3.167.103
110	10.3.167.104/29	10.3.167.105 – 10.3.167.110	10.3.167.111
111	10.3.167.112/29	10.3.167.113 – 10.3.167.118	10.3.167.119
112	10.3.167.120/29	10.3.167.121 – 10.3.167.126	10.3.167.127
113	10.3.167.128/29	10.3.167.129 – 10.3.167.134	10.3.167.135
114	10.3.167.136/29	10.3.167.137 – 10.3.167.142	10.3.167.143
115	10.3.167.144/29	10.3.167.145 – 10.3.167.150	10.3.167.151
116	10.3.167.152/29	10.3.167.153 – 10.3.167.158	10.3.167.159
117	10.3.167.160/29	10.3.167.161 – 10.3.167.166	10.3.167.167
118	10.3.167.168/29	10.3.167.169 – 10.3.167.174	10.3.167.175
119	10.3.167.176/29	10.3.167.177 – 10.3.167.182	10.3.167.183
120	10.3.167.184/29	10.3.167.185 – 10.3.167.190	10.3.167.191
121	10.3.167.192/29	10.3.167.193 – 10.3.167.198	10.3.167.199
122	10.3.167.200/29	10.3.167.201 – 10.3.167.206	10.3.167.207
123	10.3.167.208/29	10.3.167.209 – 10.3.167.214	10.3.167.215
124	10.3.167.216/29	10.3.167.217 – 10.3.167.222	10.3.167.223
125	10.3.167.224/29	10.3.167.225 – 10.3.167.230	10.3.167.231
126	10.3.167.232/29	10.3.167.233 – 10.3.167.238	10.3.167.239
127	10.3.167.240/29	10.3.167.241 – 10.3.167.246	10.3.167.247
128	10.3.167.248/29	10.3.167.249 – 10.3.167.254	10.3.167.255

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 →