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)10.64.72.0/22

network10.64.72.0/22

broadcast10.64.75.255

first host10.64.72.1

last host10.64.75.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.64.72.0/22

address00001010.01000000.01001000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000000.01001000.00000000

broadcast00001010.01000000.01001011.11111111

green = network part, grey = host part

hex0x0a404800

decimal171984896

reverse dns0.72.64.10.in-addr.arpa

ipv4-mapped::ffff:a40:4800

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.64.72.0/29	10.64.72.1 – 10.64.72.6	10.64.72.7
2	10.64.72.8/29	10.64.72.9 – 10.64.72.14	10.64.72.15
3	10.64.72.16/29	10.64.72.17 – 10.64.72.22	10.64.72.23
4	10.64.72.24/29	10.64.72.25 – 10.64.72.30	10.64.72.31
5	10.64.72.32/29	10.64.72.33 – 10.64.72.38	10.64.72.39
6	10.64.72.40/29	10.64.72.41 – 10.64.72.46	10.64.72.47
7	10.64.72.48/29	10.64.72.49 – 10.64.72.54	10.64.72.55
8	10.64.72.56/29	10.64.72.57 – 10.64.72.62	10.64.72.63
9	10.64.72.64/29	10.64.72.65 – 10.64.72.70	10.64.72.71
10	10.64.72.72/29	10.64.72.73 – 10.64.72.78	10.64.72.79
11	10.64.72.80/29	10.64.72.81 – 10.64.72.86	10.64.72.87
12	10.64.72.88/29	10.64.72.89 – 10.64.72.94	10.64.72.95
13	10.64.72.96/29	10.64.72.97 – 10.64.72.102	10.64.72.103
14	10.64.72.104/29	10.64.72.105 – 10.64.72.110	10.64.72.111
15	10.64.72.112/29	10.64.72.113 – 10.64.72.118	10.64.72.119
16	10.64.72.120/29	10.64.72.121 – 10.64.72.126	10.64.72.127
17	10.64.72.128/29	10.64.72.129 – 10.64.72.134	10.64.72.135
18	10.64.72.136/29	10.64.72.137 – 10.64.72.142	10.64.72.143
19	10.64.72.144/29	10.64.72.145 – 10.64.72.150	10.64.72.151
20	10.64.72.152/29	10.64.72.153 – 10.64.72.158	10.64.72.159
21	10.64.72.160/29	10.64.72.161 – 10.64.72.166	10.64.72.167
22	10.64.72.168/29	10.64.72.169 – 10.64.72.174	10.64.72.175
23	10.64.72.176/29	10.64.72.177 – 10.64.72.182	10.64.72.183
24	10.64.72.184/29	10.64.72.185 – 10.64.72.190	10.64.72.191
25	10.64.72.192/29	10.64.72.193 – 10.64.72.198	10.64.72.199
26	10.64.72.200/29	10.64.72.201 – 10.64.72.206	10.64.72.207
27	10.64.72.208/29	10.64.72.209 – 10.64.72.214	10.64.72.215
28	10.64.72.216/29	10.64.72.217 – 10.64.72.222	10.64.72.223
29	10.64.72.224/29	10.64.72.225 – 10.64.72.230	10.64.72.231
30	10.64.72.232/29	10.64.72.233 – 10.64.72.238	10.64.72.239
31	10.64.72.240/29	10.64.72.241 – 10.64.72.246	10.64.72.247
32	10.64.72.248/29	10.64.72.249 – 10.64.72.254	10.64.72.255
33	10.64.73.0/29	10.64.73.1 – 10.64.73.6	10.64.73.7
34	10.64.73.8/29	10.64.73.9 – 10.64.73.14	10.64.73.15
35	10.64.73.16/29	10.64.73.17 – 10.64.73.22	10.64.73.23
36	10.64.73.24/29	10.64.73.25 – 10.64.73.30	10.64.73.31
37	10.64.73.32/29	10.64.73.33 – 10.64.73.38	10.64.73.39
38	10.64.73.40/29	10.64.73.41 – 10.64.73.46	10.64.73.47
39	10.64.73.48/29	10.64.73.49 – 10.64.73.54	10.64.73.55
40	10.64.73.56/29	10.64.73.57 – 10.64.73.62	10.64.73.63
41	10.64.73.64/29	10.64.73.65 – 10.64.73.70	10.64.73.71
42	10.64.73.72/29	10.64.73.73 – 10.64.73.78	10.64.73.79
43	10.64.73.80/29	10.64.73.81 – 10.64.73.86	10.64.73.87
44	10.64.73.88/29	10.64.73.89 – 10.64.73.94	10.64.73.95
45	10.64.73.96/29	10.64.73.97 – 10.64.73.102	10.64.73.103
46	10.64.73.104/29	10.64.73.105 – 10.64.73.110	10.64.73.111
47	10.64.73.112/29	10.64.73.113 – 10.64.73.118	10.64.73.119
48	10.64.73.120/29	10.64.73.121 – 10.64.73.126	10.64.73.127
49	10.64.73.128/29	10.64.73.129 – 10.64.73.134	10.64.73.135
50	10.64.73.136/29	10.64.73.137 – 10.64.73.142	10.64.73.143
51	10.64.73.144/29	10.64.73.145 – 10.64.73.150	10.64.73.151
52	10.64.73.152/29	10.64.73.153 – 10.64.73.158	10.64.73.159
53	10.64.73.160/29	10.64.73.161 – 10.64.73.166	10.64.73.167
54	10.64.73.168/29	10.64.73.169 – 10.64.73.174	10.64.73.175
55	10.64.73.176/29	10.64.73.177 – 10.64.73.182	10.64.73.183
56	10.64.73.184/29	10.64.73.185 – 10.64.73.190	10.64.73.191
57	10.64.73.192/29	10.64.73.193 – 10.64.73.198	10.64.73.199
58	10.64.73.200/29	10.64.73.201 – 10.64.73.206	10.64.73.207
59	10.64.73.208/29	10.64.73.209 – 10.64.73.214	10.64.73.215
60	10.64.73.216/29	10.64.73.217 – 10.64.73.222	10.64.73.223
61	10.64.73.224/29	10.64.73.225 – 10.64.73.230	10.64.73.231
62	10.64.73.232/29	10.64.73.233 – 10.64.73.238	10.64.73.239
63	10.64.73.240/29	10.64.73.241 – 10.64.73.246	10.64.73.247
64	10.64.73.248/29	10.64.73.249 – 10.64.73.254	10.64.73.255
65	10.64.74.0/29	10.64.74.1 – 10.64.74.6	10.64.74.7
66	10.64.74.8/29	10.64.74.9 – 10.64.74.14	10.64.74.15
67	10.64.74.16/29	10.64.74.17 – 10.64.74.22	10.64.74.23
68	10.64.74.24/29	10.64.74.25 – 10.64.74.30	10.64.74.31
69	10.64.74.32/29	10.64.74.33 – 10.64.74.38	10.64.74.39
70	10.64.74.40/29	10.64.74.41 – 10.64.74.46	10.64.74.47
71	10.64.74.48/29	10.64.74.49 – 10.64.74.54	10.64.74.55
72	10.64.74.56/29	10.64.74.57 – 10.64.74.62	10.64.74.63
73	10.64.74.64/29	10.64.74.65 – 10.64.74.70	10.64.74.71
74	10.64.74.72/29	10.64.74.73 – 10.64.74.78	10.64.74.79
75	10.64.74.80/29	10.64.74.81 – 10.64.74.86	10.64.74.87
76	10.64.74.88/29	10.64.74.89 – 10.64.74.94	10.64.74.95
77	10.64.74.96/29	10.64.74.97 – 10.64.74.102	10.64.74.103
78	10.64.74.104/29	10.64.74.105 – 10.64.74.110	10.64.74.111
79	10.64.74.112/29	10.64.74.113 – 10.64.74.118	10.64.74.119
80	10.64.74.120/29	10.64.74.121 – 10.64.74.126	10.64.74.127
81	10.64.74.128/29	10.64.74.129 – 10.64.74.134	10.64.74.135
82	10.64.74.136/29	10.64.74.137 – 10.64.74.142	10.64.74.143
83	10.64.74.144/29	10.64.74.145 – 10.64.74.150	10.64.74.151
84	10.64.74.152/29	10.64.74.153 – 10.64.74.158	10.64.74.159
85	10.64.74.160/29	10.64.74.161 – 10.64.74.166	10.64.74.167
86	10.64.74.168/29	10.64.74.169 – 10.64.74.174	10.64.74.175
87	10.64.74.176/29	10.64.74.177 – 10.64.74.182	10.64.74.183
88	10.64.74.184/29	10.64.74.185 – 10.64.74.190	10.64.74.191
89	10.64.74.192/29	10.64.74.193 – 10.64.74.198	10.64.74.199
90	10.64.74.200/29	10.64.74.201 – 10.64.74.206	10.64.74.207
91	10.64.74.208/29	10.64.74.209 – 10.64.74.214	10.64.74.215
92	10.64.74.216/29	10.64.74.217 – 10.64.74.222	10.64.74.223
93	10.64.74.224/29	10.64.74.225 – 10.64.74.230	10.64.74.231
94	10.64.74.232/29	10.64.74.233 – 10.64.74.238	10.64.74.239
95	10.64.74.240/29	10.64.74.241 – 10.64.74.246	10.64.74.247
96	10.64.74.248/29	10.64.74.249 – 10.64.74.254	10.64.74.255
97	10.64.75.0/29	10.64.75.1 – 10.64.75.6	10.64.75.7
98	10.64.75.8/29	10.64.75.9 – 10.64.75.14	10.64.75.15
99	10.64.75.16/29	10.64.75.17 – 10.64.75.22	10.64.75.23
100	10.64.75.24/29	10.64.75.25 – 10.64.75.30	10.64.75.31
101	10.64.75.32/29	10.64.75.33 – 10.64.75.38	10.64.75.39
102	10.64.75.40/29	10.64.75.41 – 10.64.75.46	10.64.75.47
103	10.64.75.48/29	10.64.75.49 – 10.64.75.54	10.64.75.55
104	10.64.75.56/29	10.64.75.57 – 10.64.75.62	10.64.75.63
105	10.64.75.64/29	10.64.75.65 – 10.64.75.70	10.64.75.71
106	10.64.75.72/29	10.64.75.73 – 10.64.75.78	10.64.75.79
107	10.64.75.80/29	10.64.75.81 – 10.64.75.86	10.64.75.87
108	10.64.75.88/29	10.64.75.89 – 10.64.75.94	10.64.75.95
109	10.64.75.96/29	10.64.75.97 – 10.64.75.102	10.64.75.103
110	10.64.75.104/29	10.64.75.105 – 10.64.75.110	10.64.75.111
111	10.64.75.112/29	10.64.75.113 – 10.64.75.118	10.64.75.119
112	10.64.75.120/29	10.64.75.121 – 10.64.75.126	10.64.75.127
113	10.64.75.128/29	10.64.75.129 – 10.64.75.134	10.64.75.135
114	10.64.75.136/29	10.64.75.137 – 10.64.75.142	10.64.75.143
115	10.64.75.144/29	10.64.75.145 – 10.64.75.150	10.64.75.151
116	10.64.75.152/29	10.64.75.153 – 10.64.75.158	10.64.75.159
117	10.64.75.160/29	10.64.75.161 – 10.64.75.166	10.64.75.167
118	10.64.75.168/29	10.64.75.169 – 10.64.75.174	10.64.75.175
119	10.64.75.176/29	10.64.75.177 – 10.64.75.182	10.64.75.183
120	10.64.75.184/29	10.64.75.185 – 10.64.75.190	10.64.75.191
121	10.64.75.192/29	10.64.75.193 – 10.64.75.198	10.64.75.199
122	10.64.75.200/29	10.64.75.201 – 10.64.75.206	10.64.75.207
123	10.64.75.208/29	10.64.75.209 – 10.64.75.214	10.64.75.215
124	10.64.75.216/29	10.64.75.217 – 10.64.75.222	10.64.75.223
125	10.64.75.224/29	10.64.75.225 – 10.64.75.230	10.64.75.231
126	10.64.75.232/29	10.64.75.233 – 10.64.75.238	10.64.75.239
127	10.64.75.240/29	10.64.75.241 – 10.64.75.246	10.64.75.247
128	10.64.75.248/29	10.64.75.249 – 10.64.75.254	10.64.75.255

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 →