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)10.151.80.0/22

network10.151.80.0/22

broadcast10.151.83.255

first host10.151.80.1

last host10.151.83.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.151.80.0/22

address00001010.10010111.01010000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010111.01010000.00000000

broadcast00001010.10010111.01010011.11111111

green = network part, grey = host part

hex0x0a975000

decimal177688576

reverse dns0.80.151.10.in-addr.arpa

ipv4-mapped::ffff:a97:5000

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.151.80.0/29	10.151.80.1 – 10.151.80.6	10.151.80.7
2	10.151.80.8/29	10.151.80.9 – 10.151.80.14	10.151.80.15
3	10.151.80.16/29	10.151.80.17 – 10.151.80.22	10.151.80.23
4	10.151.80.24/29	10.151.80.25 – 10.151.80.30	10.151.80.31
5	10.151.80.32/29	10.151.80.33 – 10.151.80.38	10.151.80.39
6	10.151.80.40/29	10.151.80.41 – 10.151.80.46	10.151.80.47
7	10.151.80.48/29	10.151.80.49 – 10.151.80.54	10.151.80.55
8	10.151.80.56/29	10.151.80.57 – 10.151.80.62	10.151.80.63
9	10.151.80.64/29	10.151.80.65 – 10.151.80.70	10.151.80.71
10	10.151.80.72/29	10.151.80.73 – 10.151.80.78	10.151.80.79
11	10.151.80.80/29	10.151.80.81 – 10.151.80.86	10.151.80.87
12	10.151.80.88/29	10.151.80.89 – 10.151.80.94	10.151.80.95
13	10.151.80.96/29	10.151.80.97 – 10.151.80.102	10.151.80.103
14	10.151.80.104/29	10.151.80.105 – 10.151.80.110	10.151.80.111
15	10.151.80.112/29	10.151.80.113 – 10.151.80.118	10.151.80.119
16	10.151.80.120/29	10.151.80.121 – 10.151.80.126	10.151.80.127
17	10.151.80.128/29	10.151.80.129 – 10.151.80.134	10.151.80.135
18	10.151.80.136/29	10.151.80.137 – 10.151.80.142	10.151.80.143
19	10.151.80.144/29	10.151.80.145 – 10.151.80.150	10.151.80.151
20	10.151.80.152/29	10.151.80.153 – 10.151.80.158	10.151.80.159
21	10.151.80.160/29	10.151.80.161 – 10.151.80.166	10.151.80.167
22	10.151.80.168/29	10.151.80.169 – 10.151.80.174	10.151.80.175
23	10.151.80.176/29	10.151.80.177 – 10.151.80.182	10.151.80.183
24	10.151.80.184/29	10.151.80.185 – 10.151.80.190	10.151.80.191
25	10.151.80.192/29	10.151.80.193 – 10.151.80.198	10.151.80.199
26	10.151.80.200/29	10.151.80.201 – 10.151.80.206	10.151.80.207
27	10.151.80.208/29	10.151.80.209 – 10.151.80.214	10.151.80.215
28	10.151.80.216/29	10.151.80.217 – 10.151.80.222	10.151.80.223
29	10.151.80.224/29	10.151.80.225 – 10.151.80.230	10.151.80.231
30	10.151.80.232/29	10.151.80.233 – 10.151.80.238	10.151.80.239
31	10.151.80.240/29	10.151.80.241 – 10.151.80.246	10.151.80.247
32	10.151.80.248/29	10.151.80.249 – 10.151.80.254	10.151.80.255
33	10.151.81.0/29	10.151.81.1 – 10.151.81.6	10.151.81.7
34	10.151.81.8/29	10.151.81.9 – 10.151.81.14	10.151.81.15
35	10.151.81.16/29	10.151.81.17 – 10.151.81.22	10.151.81.23
36	10.151.81.24/29	10.151.81.25 – 10.151.81.30	10.151.81.31
37	10.151.81.32/29	10.151.81.33 – 10.151.81.38	10.151.81.39
38	10.151.81.40/29	10.151.81.41 – 10.151.81.46	10.151.81.47
39	10.151.81.48/29	10.151.81.49 – 10.151.81.54	10.151.81.55
40	10.151.81.56/29	10.151.81.57 – 10.151.81.62	10.151.81.63
41	10.151.81.64/29	10.151.81.65 – 10.151.81.70	10.151.81.71
42	10.151.81.72/29	10.151.81.73 – 10.151.81.78	10.151.81.79
43	10.151.81.80/29	10.151.81.81 – 10.151.81.86	10.151.81.87
44	10.151.81.88/29	10.151.81.89 – 10.151.81.94	10.151.81.95
45	10.151.81.96/29	10.151.81.97 – 10.151.81.102	10.151.81.103
46	10.151.81.104/29	10.151.81.105 – 10.151.81.110	10.151.81.111
47	10.151.81.112/29	10.151.81.113 – 10.151.81.118	10.151.81.119
48	10.151.81.120/29	10.151.81.121 – 10.151.81.126	10.151.81.127
49	10.151.81.128/29	10.151.81.129 – 10.151.81.134	10.151.81.135
50	10.151.81.136/29	10.151.81.137 – 10.151.81.142	10.151.81.143
51	10.151.81.144/29	10.151.81.145 – 10.151.81.150	10.151.81.151
52	10.151.81.152/29	10.151.81.153 – 10.151.81.158	10.151.81.159
53	10.151.81.160/29	10.151.81.161 – 10.151.81.166	10.151.81.167
54	10.151.81.168/29	10.151.81.169 – 10.151.81.174	10.151.81.175
55	10.151.81.176/29	10.151.81.177 – 10.151.81.182	10.151.81.183
56	10.151.81.184/29	10.151.81.185 – 10.151.81.190	10.151.81.191
57	10.151.81.192/29	10.151.81.193 – 10.151.81.198	10.151.81.199
58	10.151.81.200/29	10.151.81.201 – 10.151.81.206	10.151.81.207
59	10.151.81.208/29	10.151.81.209 – 10.151.81.214	10.151.81.215
60	10.151.81.216/29	10.151.81.217 – 10.151.81.222	10.151.81.223
61	10.151.81.224/29	10.151.81.225 – 10.151.81.230	10.151.81.231
62	10.151.81.232/29	10.151.81.233 – 10.151.81.238	10.151.81.239
63	10.151.81.240/29	10.151.81.241 – 10.151.81.246	10.151.81.247
64	10.151.81.248/29	10.151.81.249 – 10.151.81.254	10.151.81.255
65	10.151.82.0/29	10.151.82.1 – 10.151.82.6	10.151.82.7
66	10.151.82.8/29	10.151.82.9 – 10.151.82.14	10.151.82.15
67	10.151.82.16/29	10.151.82.17 – 10.151.82.22	10.151.82.23
68	10.151.82.24/29	10.151.82.25 – 10.151.82.30	10.151.82.31
69	10.151.82.32/29	10.151.82.33 – 10.151.82.38	10.151.82.39
70	10.151.82.40/29	10.151.82.41 – 10.151.82.46	10.151.82.47
71	10.151.82.48/29	10.151.82.49 – 10.151.82.54	10.151.82.55
72	10.151.82.56/29	10.151.82.57 – 10.151.82.62	10.151.82.63
73	10.151.82.64/29	10.151.82.65 – 10.151.82.70	10.151.82.71
74	10.151.82.72/29	10.151.82.73 – 10.151.82.78	10.151.82.79
75	10.151.82.80/29	10.151.82.81 – 10.151.82.86	10.151.82.87
76	10.151.82.88/29	10.151.82.89 – 10.151.82.94	10.151.82.95
77	10.151.82.96/29	10.151.82.97 – 10.151.82.102	10.151.82.103
78	10.151.82.104/29	10.151.82.105 – 10.151.82.110	10.151.82.111
79	10.151.82.112/29	10.151.82.113 – 10.151.82.118	10.151.82.119
80	10.151.82.120/29	10.151.82.121 – 10.151.82.126	10.151.82.127
81	10.151.82.128/29	10.151.82.129 – 10.151.82.134	10.151.82.135
82	10.151.82.136/29	10.151.82.137 – 10.151.82.142	10.151.82.143
83	10.151.82.144/29	10.151.82.145 – 10.151.82.150	10.151.82.151
84	10.151.82.152/29	10.151.82.153 – 10.151.82.158	10.151.82.159
85	10.151.82.160/29	10.151.82.161 – 10.151.82.166	10.151.82.167
86	10.151.82.168/29	10.151.82.169 – 10.151.82.174	10.151.82.175
87	10.151.82.176/29	10.151.82.177 – 10.151.82.182	10.151.82.183
88	10.151.82.184/29	10.151.82.185 – 10.151.82.190	10.151.82.191
89	10.151.82.192/29	10.151.82.193 – 10.151.82.198	10.151.82.199
90	10.151.82.200/29	10.151.82.201 – 10.151.82.206	10.151.82.207
91	10.151.82.208/29	10.151.82.209 – 10.151.82.214	10.151.82.215
92	10.151.82.216/29	10.151.82.217 – 10.151.82.222	10.151.82.223
93	10.151.82.224/29	10.151.82.225 – 10.151.82.230	10.151.82.231
94	10.151.82.232/29	10.151.82.233 – 10.151.82.238	10.151.82.239
95	10.151.82.240/29	10.151.82.241 – 10.151.82.246	10.151.82.247
96	10.151.82.248/29	10.151.82.249 – 10.151.82.254	10.151.82.255
97	10.151.83.0/29	10.151.83.1 – 10.151.83.6	10.151.83.7
98	10.151.83.8/29	10.151.83.9 – 10.151.83.14	10.151.83.15
99	10.151.83.16/29	10.151.83.17 – 10.151.83.22	10.151.83.23
100	10.151.83.24/29	10.151.83.25 – 10.151.83.30	10.151.83.31
101	10.151.83.32/29	10.151.83.33 – 10.151.83.38	10.151.83.39
102	10.151.83.40/29	10.151.83.41 – 10.151.83.46	10.151.83.47
103	10.151.83.48/29	10.151.83.49 – 10.151.83.54	10.151.83.55
104	10.151.83.56/29	10.151.83.57 – 10.151.83.62	10.151.83.63
105	10.151.83.64/29	10.151.83.65 – 10.151.83.70	10.151.83.71
106	10.151.83.72/29	10.151.83.73 – 10.151.83.78	10.151.83.79
107	10.151.83.80/29	10.151.83.81 – 10.151.83.86	10.151.83.87
108	10.151.83.88/29	10.151.83.89 – 10.151.83.94	10.151.83.95
109	10.151.83.96/29	10.151.83.97 – 10.151.83.102	10.151.83.103
110	10.151.83.104/29	10.151.83.105 – 10.151.83.110	10.151.83.111
111	10.151.83.112/29	10.151.83.113 – 10.151.83.118	10.151.83.119
112	10.151.83.120/29	10.151.83.121 – 10.151.83.126	10.151.83.127
113	10.151.83.128/29	10.151.83.129 – 10.151.83.134	10.151.83.135
114	10.151.83.136/29	10.151.83.137 – 10.151.83.142	10.151.83.143
115	10.151.83.144/29	10.151.83.145 – 10.151.83.150	10.151.83.151
116	10.151.83.152/29	10.151.83.153 – 10.151.83.158	10.151.83.159
117	10.151.83.160/29	10.151.83.161 – 10.151.83.166	10.151.83.167
118	10.151.83.168/29	10.151.83.169 – 10.151.83.174	10.151.83.175
119	10.151.83.176/29	10.151.83.177 – 10.151.83.182	10.151.83.183
120	10.151.83.184/29	10.151.83.185 – 10.151.83.190	10.151.83.191
121	10.151.83.192/29	10.151.83.193 – 10.151.83.198	10.151.83.199
122	10.151.83.200/29	10.151.83.201 – 10.151.83.206	10.151.83.207
123	10.151.83.208/29	10.151.83.209 – 10.151.83.214	10.151.83.215
124	10.151.83.216/29	10.151.83.217 – 10.151.83.222	10.151.83.223
125	10.151.83.224/29	10.151.83.225 – 10.151.83.230	10.151.83.231
126	10.151.83.232/29	10.151.83.233 – 10.151.83.238	10.151.83.239
127	10.151.83.240/29	10.151.83.241 – 10.151.83.246	10.151.83.247
128	10.151.83.248/29	10.151.83.249 – 10.151.83.254	10.151.83.255

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 →