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)10.68.4.0/22

network10.68.4.0/22

broadcast10.68.7.255

first host10.68.4.1

last host10.68.7.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.68.4.0/22

address00001010.01000100.00000100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000100.00000100.00000000

broadcast00001010.01000100.00000111.11111111

green = network part, grey = host part

hex0x0a440400

decimal172229632

reverse dns0.4.68.10.in-addr.arpa

ipv4-mapped::ffff:a44:400

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.68.4.0/29	10.68.4.1 – 10.68.4.6	10.68.4.7
2	10.68.4.8/29	10.68.4.9 – 10.68.4.14	10.68.4.15
3	10.68.4.16/29	10.68.4.17 – 10.68.4.22	10.68.4.23
4	10.68.4.24/29	10.68.4.25 – 10.68.4.30	10.68.4.31
5	10.68.4.32/29	10.68.4.33 – 10.68.4.38	10.68.4.39
6	10.68.4.40/29	10.68.4.41 – 10.68.4.46	10.68.4.47
7	10.68.4.48/29	10.68.4.49 – 10.68.4.54	10.68.4.55
8	10.68.4.56/29	10.68.4.57 – 10.68.4.62	10.68.4.63
9	10.68.4.64/29	10.68.4.65 – 10.68.4.70	10.68.4.71
10	10.68.4.72/29	10.68.4.73 – 10.68.4.78	10.68.4.79
11	10.68.4.80/29	10.68.4.81 – 10.68.4.86	10.68.4.87
12	10.68.4.88/29	10.68.4.89 – 10.68.4.94	10.68.4.95
13	10.68.4.96/29	10.68.4.97 – 10.68.4.102	10.68.4.103
14	10.68.4.104/29	10.68.4.105 – 10.68.4.110	10.68.4.111
15	10.68.4.112/29	10.68.4.113 – 10.68.4.118	10.68.4.119
16	10.68.4.120/29	10.68.4.121 – 10.68.4.126	10.68.4.127
17	10.68.4.128/29	10.68.4.129 – 10.68.4.134	10.68.4.135
18	10.68.4.136/29	10.68.4.137 – 10.68.4.142	10.68.4.143
19	10.68.4.144/29	10.68.4.145 – 10.68.4.150	10.68.4.151
20	10.68.4.152/29	10.68.4.153 – 10.68.4.158	10.68.4.159
21	10.68.4.160/29	10.68.4.161 – 10.68.4.166	10.68.4.167
22	10.68.4.168/29	10.68.4.169 – 10.68.4.174	10.68.4.175
23	10.68.4.176/29	10.68.4.177 – 10.68.4.182	10.68.4.183
24	10.68.4.184/29	10.68.4.185 – 10.68.4.190	10.68.4.191
25	10.68.4.192/29	10.68.4.193 – 10.68.4.198	10.68.4.199
26	10.68.4.200/29	10.68.4.201 – 10.68.4.206	10.68.4.207
27	10.68.4.208/29	10.68.4.209 – 10.68.4.214	10.68.4.215
28	10.68.4.216/29	10.68.4.217 – 10.68.4.222	10.68.4.223
29	10.68.4.224/29	10.68.4.225 – 10.68.4.230	10.68.4.231
30	10.68.4.232/29	10.68.4.233 – 10.68.4.238	10.68.4.239
31	10.68.4.240/29	10.68.4.241 – 10.68.4.246	10.68.4.247
32	10.68.4.248/29	10.68.4.249 – 10.68.4.254	10.68.4.255
33	10.68.5.0/29	10.68.5.1 – 10.68.5.6	10.68.5.7
34	10.68.5.8/29	10.68.5.9 – 10.68.5.14	10.68.5.15
35	10.68.5.16/29	10.68.5.17 – 10.68.5.22	10.68.5.23
36	10.68.5.24/29	10.68.5.25 – 10.68.5.30	10.68.5.31
37	10.68.5.32/29	10.68.5.33 – 10.68.5.38	10.68.5.39
38	10.68.5.40/29	10.68.5.41 – 10.68.5.46	10.68.5.47
39	10.68.5.48/29	10.68.5.49 – 10.68.5.54	10.68.5.55
40	10.68.5.56/29	10.68.5.57 – 10.68.5.62	10.68.5.63
41	10.68.5.64/29	10.68.5.65 – 10.68.5.70	10.68.5.71
42	10.68.5.72/29	10.68.5.73 – 10.68.5.78	10.68.5.79
43	10.68.5.80/29	10.68.5.81 – 10.68.5.86	10.68.5.87
44	10.68.5.88/29	10.68.5.89 – 10.68.5.94	10.68.5.95
45	10.68.5.96/29	10.68.5.97 – 10.68.5.102	10.68.5.103
46	10.68.5.104/29	10.68.5.105 – 10.68.5.110	10.68.5.111
47	10.68.5.112/29	10.68.5.113 – 10.68.5.118	10.68.5.119
48	10.68.5.120/29	10.68.5.121 – 10.68.5.126	10.68.5.127
49	10.68.5.128/29	10.68.5.129 – 10.68.5.134	10.68.5.135
50	10.68.5.136/29	10.68.5.137 – 10.68.5.142	10.68.5.143
51	10.68.5.144/29	10.68.5.145 – 10.68.5.150	10.68.5.151
52	10.68.5.152/29	10.68.5.153 – 10.68.5.158	10.68.5.159
53	10.68.5.160/29	10.68.5.161 – 10.68.5.166	10.68.5.167
54	10.68.5.168/29	10.68.5.169 – 10.68.5.174	10.68.5.175
55	10.68.5.176/29	10.68.5.177 – 10.68.5.182	10.68.5.183
56	10.68.5.184/29	10.68.5.185 – 10.68.5.190	10.68.5.191
57	10.68.5.192/29	10.68.5.193 – 10.68.5.198	10.68.5.199
58	10.68.5.200/29	10.68.5.201 – 10.68.5.206	10.68.5.207
59	10.68.5.208/29	10.68.5.209 – 10.68.5.214	10.68.5.215
60	10.68.5.216/29	10.68.5.217 – 10.68.5.222	10.68.5.223
61	10.68.5.224/29	10.68.5.225 – 10.68.5.230	10.68.5.231
62	10.68.5.232/29	10.68.5.233 – 10.68.5.238	10.68.5.239
63	10.68.5.240/29	10.68.5.241 – 10.68.5.246	10.68.5.247
64	10.68.5.248/29	10.68.5.249 – 10.68.5.254	10.68.5.255
65	10.68.6.0/29	10.68.6.1 – 10.68.6.6	10.68.6.7
66	10.68.6.8/29	10.68.6.9 – 10.68.6.14	10.68.6.15
67	10.68.6.16/29	10.68.6.17 – 10.68.6.22	10.68.6.23
68	10.68.6.24/29	10.68.6.25 – 10.68.6.30	10.68.6.31
69	10.68.6.32/29	10.68.6.33 – 10.68.6.38	10.68.6.39
70	10.68.6.40/29	10.68.6.41 – 10.68.6.46	10.68.6.47
71	10.68.6.48/29	10.68.6.49 – 10.68.6.54	10.68.6.55
72	10.68.6.56/29	10.68.6.57 – 10.68.6.62	10.68.6.63
73	10.68.6.64/29	10.68.6.65 – 10.68.6.70	10.68.6.71
74	10.68.6.72/29	10.68.6.73 – 10.68.6.78	10.68.6.79
75	10.68.6.80/29	10.68.6.81 – 10.68.6.86	10.68.6.87
76	10.68.6.88/29	10.68.6.89 – 10.68.6.94	10.68.6.95
77	10.68.6.96/29	10.68.6.97 – 10.68.6.102	10.68.6.103
78	10.68.6.104/29	10.68.6.105 – 10.68.6.110	10.68.6.111
79	10.68.6.112/29	10.68.6.113 – 10.68.6.118	10.68.6.119
80	10.68.6.120/29	10.68.6.121 – 10.68.6.126	10.68.6.127
81	10.68.6.128/29	10.68.6.129 – 10.68.6.134	10.68.6.135
82	10.68.6.136/29	10.68.6.137 – 10.68.6.142	10.68.6.143
83	10.68.6.144/29	10.68.6.145 – 10.68.6.150	10.68.6.151
84	10.68.6.152/29	10.68.6.153 – 10.68.6.158	10.68.6.159
85	10.68.6.160/29	10.68.6.161 – 10.68.6.166	10.68.6.167
86	10.68.6.168/29	10.68.6.169 – 10.68.6.174	10.68.6.175
87	10.68.6.176/29	10.68.6.177 – 10.68.6.182	10.68.6.183
88	10.68.6.184/29	10.68.6.185 – 10.68.6.190	10.68.6.191
89	10.68.6.192/29	10.68.6.193 – 10.68.6.198	10.68.6.199
90	10.68.6.200/29	10.68.6.201 – 10.68.6.206	10.68.6.207
91	10.68.6.208/29	10.68.6.209 – 10.68.6.214	10.68.6.215
92	10.68.6.216/29	10.68.6.217 – 10.68.6.222	10.68.6.223
93	10.68.6.224/29	10.68.6.225 – 10.68.6.230	10.68.6.231
94	10.68.6.232/29	10.68.6.233 – 10.68.6.238	10.68.6.239
95	10.68.6.240/29	10.68.6.241 – 10.68.6.246	10.68.6.247
96	10.68.6.248/29	10.68.6.249 – 10.68.6.254	10.68.6.255
97	10.68.7.0/29	10.68.7.1 – 10.68.7.6	10.68.7.7
98	10.68.7.8/29	10.68.7.9 – 10.68.7.14	10.68.7.15
99	10.68.7.16/29	10.68.7.17 – 10.68.7.22	10.68.7.23
100	10.68.7.24/29	10.68.7.25 – 10.68.7.30	10.68.7.31
101	10.68.7.32/29	10.68.7.33 – 10.68.7.38	10.68.7.39
102	10.68.7.40/29	10.68.7.41 – 10.68.7.46	10.68.7.47
103	10.68.7.48/29	10.68.7.49 – 10.68.7.54	10.68.7.55
104	10.68.7.56/29	10.68.7.57 – 10.68.7.62	10.68.7.63
105	10.68.7.64/29	10.68.7.65 – 10.68.7.70	10.68.7.71
106	10.68.7.72/29	10.68.7.73 – 10.68.7.78	10.68.7.79
107	10.68.7.80/29	10.68.7.81 – 10.68.7.86	10.68.7.87
108	10.68.7.88/29	10.68.7.89 – 10.68.7.94	10.68.7.95
109	10.68.7.96/29	10.68.7.97 – 10.68.7.102	10.68.7.103
110	10.68.7.104/29	10.68.7.105 – 10.68.7.110	10.68.7.111
111	10.68.7.112/29	10.68.7.113 – 10.68.7.118	10.68.7.119
112	10.68.7.120/29	10.68.7.121 – 10.68.7.126	10.68.7.127
113	10.68.7.128/29	10.68.7.129 – 10.68.7.134	10.68.7.135
114	10.68.7.136/29	10.68.7.137 – 10.68.7.142	10.68.7.143
115	10.68.7.144/29	10.68.7.145 – 10.68.7.150	10.68.7.151
116	10.68.7.152/29	10.68.7.153 – 10.68.7.158	10.68.7.159
117	10.68.7.160/29	10.68.7.161 – 10.68.7.166	10.68.7.167
118	10.68.7.168/29	10.68.7.169 – 10.68.7.174	10.68.7.175
119	10.68.7.176/29	10.68.7.177 – 10.68.7.182	10.68.7.183
120	10.68.7.184/29	10.68.7.185 – 10.68.7.190	10.68.7.191
121	10.68.7.192/29	10.68.7.193 – 10.68.7.198	10.68.7.199
122	10.68.7.200/29	10.68.7.201 – 10.68.7.206	10.68.7.207
123	10.68.7.208/29	10.68.7.209 – 10.68.7.214	10.68.7.215
124	10.68.7.216/29	10.68.7.217 – 10.68.7.222	10.68.7.223
125	10.68.7.224/29	10.68.7.225 – 10.68.7.230	10.68.7.231
126	10.68.7.232/29	10.68.7.233 – 10.68.7.238	10.68.7.239
127	10.68.7.240/29	10.68.7.241 – 10.68.7.246	10.68.7.247
128	10.68.7.248/29	10.68.7.249 – 10.68.7.254	10.68.7.255

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 →