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)10.3.168.0/22

network10.3.168.0/22

broadcast10.3.171.255

first host10.3.168.1

last host10.3.171.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.168.0/22

address00001010.00000011.10101000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10101000.00000000

broadcast00001010.00000011.10101011.11111111

green = network part, grey = host part

hex0x0a03a800

decimal168011776

reverse dns0.168.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:a800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.168.0/29	10.3.168.1 – 10.3.168.6	10.3.168.7
2	10.3.168.8/29	10.3.168.9 – 10.3.168.14	10.3.168.15
3	10.3.168.16/29	10.3.168.17 – 10.3.168.22	10.3.168.23
4	10.3.168.24/29	10.3.168.25 – 10.3.168.30	10.3.168.31
5	10.3.168.32/29	10.3.168.33 – 10.3.168.38	10.3.168.39
6	10.3.168.40/29	10.3.168.41 – 10.3.168.46	10.3.168.47
7	10.3.168.48/29	10.3.168.49 – 10.3.168.54	10.3.168.55
8	10.3.168.56/29	10.3.168.57 – 10.3.168.62	10.3.168.63
9	10.3.168.64/29	10.3.168.65 – 10.3.168.70	10.3.168.71
10	10.3.168.72/29	10.3.168.73 – 10.3.168.78	10.3.168.79
11	10.3.168.80/29	10.3.168.81 – 10.3.168.86	10.3.168.87
12	10.3.168.88/29	10.3.168.89 – 10.3.168.94	10.3.168.95
13	10.3.168.96/29	10.3.168.97 – 10.3.168.102	10.3.168.103
14	10.3.168.104/29	10.3.168.105 – 10.3.168.110	10.3.168.111
15	10.3.168.112/29	10.3.168.113 – 10.3.168.118	10.3.168.119
16	10.3.168.120/29	10.3.168.121 – 10.3.168.126	10.3.168.127
17	10.3.168.128/29	10.3.168.129 – 10.3.168.134	10.3.168.135
18	10.3.168.136/29	10.3.168.137 – 10.3.168.142	10.3.168.143
19	10.3.168.144/29	10.3.168.145 – 10.3.168.150	10.3.168.151
20	10.3.168.152/29	10.3.168.153 – 10.3.168.158	10.3.168.159
21	10.3.168.160/29	10.3.168.161 – 10.3.168.166	10.3.168.167
22	10.3.168.168/29	10.3.168.169 – 10.3.168.174	10.3.168.175
23	10.3.168.176/29	10.3.168.177 – 10.3.168.182	10.3.168.183
24	10.3.168.184/29	10.3.168.185 – 10.3.168.190	10.3.168.191
25	10.3.168.192/29	10.3.168.193 – 10.3.168.198	10.3.168.199
26	10.3.168.200/29	10.3.168.201 – 10.3.168.206	10.3.168.207
27	10.3.168.208/29	10.3.168.209 – 10.3.168.214	10.3.168.215
28	10.3.168.216/29	10.3.168.217 – 10.3.168.222	10.3.168.223
29	10.3.168.224/29	10.3.168.225 – 10.3.168.230	10.3.168.231
30	10.3.168.232/29	10.3.168.233 – 10.3.168.238	10.3.168.239
31	10.3.168.240/29	10.3.168.241 – 10.3.168.246	10.3.168.247
32	10.3.168.248/29	10.3.168.249 – 10.3.168.254	10.3.168.255
33	10.3.169.0/29	10.3.169.1 – 10.3.169.6	10.3.169.7
34	10.3.169.8/29	10.3.169.9 – 10.3.169.14	10.3.169.15
35	10.3.169.16/29	10.3.169.17 – 10.3.169.22	10.3.169.23
36	10.3.169.24/29	10.3.169.25 – 10.3.169.30	10.3.169.31
37	10.3.169.32/29	10.3.169.33 – 10.3.169.38	10.3.169.39
38	10.3.169.40/29	10.3.169.41 – 10.3.169.46	10.3.169.47
39	10.3.169.48/29	10.3.169.49 – 10.3.169.54	10.3.169.55
40	10.3.169.56/29	10.3.169.57 – 10.3.169.62	10.3.169.63
41	10.3.169.64/29	10.3.169.65 – 10.3.169.70	10.3.169.71
42	10.3.169.72/29	10.3.169.73 – 10.3.169.78	10.3.169.79
43	10.3.169.80/29	10.3.169.81 – 10.3.169.86	10.3.169.87
44	10.3.169.88/29	10.3.169.89 – 10.3.169.94	10.3.169.95
45	10.3.169.96/29	10.3.169.97 – 10.3.169.102	10.3.169.103
46	10.3.169.104/29	10.3.169.105 – 10.3.169.110	10.3.169.111
47	10.3.169.112/29	10.3.169.113 – 10.3.169.118	10.3.169.119
48	10.3.169.120/29	10.3.169.121 – 10.3.169.126	10.3.169.127
49	10.3.169.128/29	10.3.169.129 – 10.3.169.134	10.3.169.135
50	10.3.169.136/29	10.3.169.137 – 10.3.169.142	10.3.169.143
51	10.3.169.144/29	10.3.169.145 – 10.3.169.150	10.3.169.151
52	10.3.169.152/29	10.3.169.153 – 10.3.169.158	10.3.169.159
53	10.3.169.160/29	10.3.169.161 – 10.3.169.166	10.3.169.167
54	10.3.169.168/29	10.3.169.169 – 10.3.169.174	10.3.169.175
55	10.3.169.176/29	10.3.169.177 – 10.3.169.182	10.3.169.183
56	10.3.169.184/29	10.3.169.185 – 10.3.169.190	10.3.169.191
57	10.3.169.192/29	10.3.169.193 – 10.3.169.198	10.3.169.199
58	10.3.169.200/29	10.3.169.201 – 10.3.169.206	10.3.169.207
59	10.3.169.208/29	10.3.169.209 – 10.3.169.214	10.3.169.215
60	10.3.169.216/29	10.3.169.217 – 10.3.169.222	10.3.169.223
61	10.3.169.224/29	10.3.169.225 – 10.3.169.230	10.3.169.231
62	10.3.169.232/29	10.3.169.233 – 10.3.169.238	10.3.169.239
63	10.3.169.240/29	10.3.169.241 – 10.3.169.246	10.3.169.247
64	10.3.169.248/29	10.3.169.249 – 10.3.169.254	10.3.169.255
65	10.3.170.0/29	10.3.170.1 – 10.3.170.6	10.3.170.7
66	10.3.170.8/29	10.3.170.9 – 10.3.170.14	10.3.170.15
67	10.3.170.16/29	10.3.170.17 – 10.3.170.22	10.3.170.23
68	10.3.170.24/29	10.3.170.25 – 10.3.170.30	10.3.170.31
69	10.3.170.32/29	10.3.170.33 – 10.3.170.38	10.3.170.39
70	10.3.170.40/29	10.3.170.41 – 10.3.170.46	10.3.170.47
71	10.3.170.48/29	10.3.170.49 – 10.3.170.54	10.3.170.55
72	10.3.170.56/29	10.3.170.57 – 10.3.170.62	10.3.170.63
73	10.3.170.64/29	10.3.170.65 – 10.3.170.70	10.3.170.71
74	10.3.170.72/29	10.3.170.73 – 10.3.170.78	10.3.170.79
75	10.3.170.80/29	10.3.170.81 – 10.3.170.86	10.3.170.87
76	10.3.170.88/29	10.3.170.89 – 10.3.170.94	10.3.170.95
77	10.3.170.96/29	10.3.170.97 – 10.3.170.102	10.3.170.103
78	10.3.170.104/29	10.3.170.105 – 10.3.170.110	10.3.170.111
79	10.3.170.112/29	10.3.170.113 – 10.3.170.118	10.3.170.119
80	10.3.170.120/29	10.3.170.121 – 10.3.170.126	10.3.170.127
81	10.3.170.128/29	10.3.170.129 – 10.3.170.134	10.3.170.135
82	10.3.170.136/29	10.3.170.137 – 10.3.170.142	10.3.170.143
83	10.3.170.144/29	10.3.170.145 – 10.3.170.150	10.3.170.151
84	10.3.170.152/29	10.3.170.153 – 10.3.170.158	10.3.170.159
85	10.3.170.160/29	10.3.170.161 – 10.3.170.166	10.3.170.167
86	10.3.170.168/29	10.3.170.169 – 10.3.170.174	10.3.170.175
87	10.3.170.176/29	10.3.170.177 – 10.3.170.182	10.3.170.183
88	10.3.170.184/29	10.3.170.185 – 10.3.170.190	10.3.170.191
89	10.3.170.192/29	10.3.170.193 – 10.3.170.198	10.3.170.199
90	10.3.170.200/29	10.3.170.201 – 10.3.170.206	10.3.170.207
91	10.3.170.208/29	10.3.170.209 – 10.3.170.214	10.3.170.215
92	10.3.170.216/29	10.3.170.217 – 10.3.170.222	10.3.170.223
93	10.3.170.224/29	10.3.170.225 – 10.3.170.230	10.3.170.231
94	10.3.170.232/29	10.3.170.233 – 10.3.170.238	10.3.170.239
95	10.3.170.240/29	10.3.170.241 – 10.3.170.246	10.3.170.247
96	10.3.170.248/29	10.3.170.249 – 10.3.170.254	10.3.170.255
97	10.3.171.0/29	10.3.171.1 – 10.3.171.6	10.3.171.7
98	10.3.171.8/29	10.3.171.9 – 10.3.171.14	10.3.171.15
99	10.3.171.16/29	10.3.171.17 – 10.3.171.22	10.3.171.23
100	10.3.171.24/29	10.3.171.25 – 10.3.171.30	10.3.171.31
101	10.3.171.32/29	10.3.171.33 – 10.3.171.38	10.3.171.39
102	10.3.171.40/29	10.3.171.41 – 10.3.171.46	10.3.171.47
103	10.3.171.48/29	10.3.171.49 – 10.3.171.54	10.3.171.55
104	10.3.171.56/29	10.3.171.57 – 10.3.171.62	10.3.171.63
105	10.3.171.64/29	10.3.171.65 – 10.3.171.70	10.3.171.71
106	10.3.171.72/29	10.3.171.73 – 10.3.171.78	10.3.171.79
107	10.3.171.80/29	10.3.171.81 – 10.3.171.86	10.3.171.87
108	10.3.171.88/29	10.3.171.89 – 10.3.171.94	10.3.171.95
109	10.3.171.96/29	10.3.171.97 – 10.3.171.102	10.3.171.103
110	10.3.171.104/29	10.3.171.105 – 10.3.171.110	10.3.171.111
111	10.3.171.112/29	10.3.171.113 – 10.3.171.118	10.3.171.119
112	10.3.171.120/29	10.3.171.121 – 10.3.171.126	10.3.171.127
113	10.3.171.128/29	10.3.171.129 – 10.3.171.134	10.3.171.135
114	10.3.171.136/29	10.3.171.137 – 10.3.171.142	10.3.171.143
115	10.3.171.144/29	10.3.171.145 – 10.3.171.150	10.3.171.151
116	10.3.171.152/29	10.3.171.153 – 10.3.171.158	10.3.171.159
117	10.3.171.160/29	10.3.171.161 – 10.3.171.166	10.3.171.167
118	10.3.171.168/29	10.3.171.169 – 10.3.171.174	10.3.171.175
119	10.3.171.176/29	10.3.171.177 – 10.3.171.182	10.3.171.183
120	10.3.171.184/29	10.3.171.185 – 10.3.171.190	10.3.171.191
121	10.3.171.192/29	10.3.171.193 – 10.3.171.198	10.3.171.199
122	10.3.171.200/29	10.3.171.201 – 10.3.171.206	10.3.171.207
123	10.3.171.208/29	10.3.171.209 – 10.3.171.214	10.3.171.215
124	10.3.171.216/29	10.3.171.217 – 10.3.171.222	10.3.171.223
125	10.3.171.224/29	10.3.171.225 – 10.3.171.230	10.3.171.231
126	10.3.171.232/29	10.3.171.233 – 10.3.171.238	10.3.171.239
127	10.3.171.240/29	10.3.171.241 – 10.3.171.246	10.3.171.247
128	10.3.171.248/29	10.3.171.249 – 10.3.171.254	10.3.171.255

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 →