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)10.151.48.0/22

network10.151.48.0/22

broadcast10.151.51.255

first host10.151.48.1

last host10.151.51.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.151.48.0/22

address00001010.10010111.00110000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010111.00110000.00000000

broadcast00001010.10010111.00110011.11111111

green = network part, grey = host part

hex0x0a973000

decimal177680384

reverse dns0.48.151.10.in-addr.arpa

ipv4-mapped::ffff:a97:3000

/22 split into /29 · 128 subnets

close ×

#	network	host range	broadcast
1	10.151.48.0/29	10.151.48.1 – 10.151.48.6	10.151.48.7
2	10.151.48.8/29	10.151.48.9 – 10.151.48.14	10.151.48.15
3	10.151.48.16/29	10.151.48.17 – 10.151.48.22	10.151.48.23
4	10.151.48.24/29	10.151.48.25 – 10.151.48.30	10.151.48.31
5	10.151.48.32/29	10.151.48.33 – 10.151.48.38	10.151.48.39
6	10.151.48.40/29	10.151.48.41 – 10.151.48.46	10.151.48.47
7	10.151.48.48/29	10.151.48.49 – 10.151.48.54	10.151.48.55
8	10.151.48.56/29	10.151.48.57 – 10.151.48.62	10.151.48.63
9	10.151.48.64/29	10.151.48.65 – 10.151.48.70	10.151.48.71
10	10.151.48.72/29	10.151.48.73 – 10.151.48.78	10.151.48.79
11	10.151.48.80/29	10.151.48.81 – 10.151.48.86	10.151.48.87
12	10.151.48.88/29	10.151.48.89 – 10.151.48.94	10.151.48.95
13	10.151.48.96/29	10.151.48.97 – 10.151.48.102	10.151.48.103
14	10.151.48.104/29	10.151.48.105 – 10.151.48.110	10.151.48.111
15	10.151.48.112/29	10.151.48.113 – 10.151.48.118	10.151.48.119
16	10.151.48.120/29	10.151.48.121 – 10.151.48.126	10.151.48.127
17	10.151.48.128/29	10.151.48.129 – 10.151.48.134	10.151.48.135
18	10.151.48.136/29	10.151.48.137 – 10.151.48.142	10.151.48.143
19	10.151.48.144/29	10.151.48.145 – 10.151.48.150	10.151.48.151
20	10.151.48.152/29	10.151.48.153 – 10.151.48.158	10.151.48.159
21	10.151.48.160/29	10.151.48.161 – 10.151.48.166	10.151.48.167
22	10.151.48.168/29	10.151.48.169 – 10.151.48.174	10.151.48.175
23	10.151.48.176/29	10.151.48.177 – 10.151.48.182	10.151.48.183
24	10.151.48.184/29	10.151.48.185 – 10.151.48.190	10.151.48.191
25	10.151.48.192/29	10.151.48.193 – 10.151.48.198	10.151.48.199
26	10.151.48.200/29	10.151.48.201 – 10.151.48.206	10.151.48.207
27	10.151.48.208/29	10.151.48.209 – 10.151.48.214	10.151.48.215
28	10.151.48.216/29	10.151.48.217 – 10.151.48.222	10.151.48.223
29	10.151.48.224/29	10.151.48.225 – 10.151.48.230	10.151.48.231
30	10.151.48.232/29	10.151.48.233 – 10.151.48.238	10.151.48.239
31	10.151.48.240/29	10.151.48.241 – 10.151.48.246	10.151.48.247
32	10.151.48.248/29	10.151.48.249 – 10.151.48.254	10.151.48.255
33	10.151.49.0/29	10.151.49.1 – 10.151.49.6	10.151.49.7
34	10.151.49.8/29	10.151.49.9 – 10.151.49.14	10.151.49.15
35	10.151.49.16/29	10.151.49.17 – 10.151.49.22	10.151.49.23
36	10.151.49.24/29	10.151.49.25 – 10.151.49.30	10.151.49.31
37	10.151.49.32/29	10.151.49.33 – 10.151.49.38	10.151.49.39
38	10.151.49.40/29	10.151.49.41 – 10.151.49.46	10.151.49.47
39	10.151.49.48/29	10.151.49.49 – 10.151.49.54	10.151.49.55
40	10.151.49.56/29	10.151.49.57 – 10.151.49.62	10.151.49.63
41	10.151.49.64/29	10.151.49.65 – 10.151.49.70	10.151.49.71
42	10.151.49.72/29	10.151.49.73 – 10.151.49.78	10.151.49.79
43	10.151.49.80/29	10.151.49.81 – 10.151.49.86	10.151.49.87
44	10.151.49.88/29	10.151.49.89 – 10.151.49.94	10.151.49.95
45	10.151.49.96/29	10.151.49.97 – 10.151.49.102	10.151.49.103
46	10.151.49.104/29	10.151.49.105 – 10.151.49.110	10.151.49.111
47	10.151.49.112/29	10.151.49.113 – 10.151.49.118	10.151.49.119
48	10.151.49.120/29	10.151.49.121 – 10.151.49.126	10.151.49.127
49	10.151.49.128/29	10.151.49.129 – 10.151.49.134	10.151.49.135
50	10.151.49.136/29	10.151.49.137 – 10.151.49.142	10.151.49.143
51	10.151.49.144/29	10.151.49.145 – 10.151.49.150	10.151.49.151
52	10.151.49.152/29	10.151.49.153 – 10.151.49.158	10.151.49.159
53	10.151.49.160/29	10.151.49.161 – 10.151.49.166	10.151.49.167
54	10.151.49.168/29	10.151.49.169 – 10.151.49.174	10.151.49.175
55	10.151.49.176/29	10.151.49.177 – 10.151.49.182	10.151.49.183
56	10.151.49.184/29	10.151.49.185 – 10.151.49.190	10.151.49.191
57	10.151.49.192/29	10.151.49.193 – 10.151.49.198	10.151.49.199
58	10.151.49.200/29	10.151.49.201 – 10.151.49.206	10.151.49.207
59	10.151.49.208/29	10.151.49.209 – 10.151.49.214	10.151.49.215
60	10.151.49.216/29	10.151.49.217 – 10.151.49.222	10.151.49.223
61	10.151.49.224/29	10.151.49.225 – 10.151.49.230	10.151.49.231
62	10.151.49.232/29	10.151.49.233 – 10.151.49.238	10.151.49.239
63	10.151.49.240/29	10.151.49.241 – 10.151.49.246	10.151.49.247
64	10.151.49.248/29	10.151.49.249 – 10.151.49.254	10.151.49.255
65	10.151.50.0/29	10.151.50.1 – 10.151.50.6	10.151.50.7
66	10.151.50.8/29	10.151.50.9 – 10.151.50.14	10.151.50.15
67	10.151.50.16/29	10.151.50.17 – 10.151.50.22	10.151.50.23
68	10.151.50.24/29	10.151.50.25 – 10.151.50.30	10.151.50.31
69	10.151.50.32/29	10.151.50.33 – 10.151.50.38	10.151.50.39
70	10.151.50.40/29	10.151.50.41 – 10.151.50.46	10.151.50.47
71	10.151.50.48/29	10.151.50.49 – 10.151.50.54	10.151.50.55
72	10.151.50.56/29	10.151.50.57 – 10.151.50.62	10.151.50.63
73	10.151.50.64/29	10.151.50.65 – 10.151.50.70	10.151.50.71
74	10.151.50.72/29	10.151.50.73 – 10.151.50.78	10.151.50.79
75	10.151.50.80/29	10.151.50.81 – 10.151.50.86	10.151.50.87
76	10.151.50.88/29	10.151.50.89 – 10.151.50.94	10.151.50.95
77	10.151.50.96/29	10.151.50.97 – 10.151.50.102	10.151.50.103
78	10.151.50.104/29	10.151.50.105 – 10.151.50.110	10.151.50.111
79	10.151.50.112/29	10.151.50.113 – 10.151.50.118	10.151.50.119
80	10.151.50.120/29	10.151.50.121 – 10.151.50.126	10.151.50.127
81	10.151.50.128/29	10.151.50.129 – 10.151.50.134	10.151.50.135
82	10.151.50.136/29	10.151.50.137 – 10.151.50.142	10.151.50.143
83	10.151.50.144/29	10.151.50.145 – 10.151.50.150	10.151.50.151
84	10.151.50.152/29	10.151.50.153 – 10.151.50.158	10.151.50.159
85	10.151.50.160/29	10.151.50.161 – 10.151.50.166	10.151.50.167
86	10.151.50.168/29	10.151.50.169 – 10.151.50.174	10.151.50.175
87	10.151.50.176/29	10.151.50.177 – 10.151.50.182	10.151.50.183
88	10.151.50.184/29	10.151.50.185 – 10.151.50.190	10.151.50.191
89	10.151.50.192/29	10.151.50.193 – 10.151.50.198	10.151.50.199
90	10.151.50.200/29	10.151.50.201 – 10.151.50.206	10.151.50.207
91	10.151.50.208/29	10.151.50.209 – 10.151.50.214	10.151.50.215
92	10.151.50.216/29	10.151.50.217 – 10.151.50.222	10.151.50.223
93	10.151.50.224/29	10.151.50.225 – 10.151.50.230	10.151.50.231
94	10.151.50.232/29	10.151.50.233 – 10.151.50.238	10.151.50.239
95	10.151.50.240/29	10.151.50.241 – 10.151.50.246	10.151.50.247
96	10.151.50.248/29	10.151.50.249 – 10.151.50.254	10.151.50.255
97	10.151.51.0/29	10.151.51.1 – 10.151.51.6	10.151.51.7
98	10.151.51.8/29	10.151.51.9 – 10.151.51.14	10.151.51.15
99	10.151.51.16/29	10.151.51.17 – 10.151.51.22	10.151.51.23
100	10.151.51.24/29	10.151.51.25 – 10.151.51.30	10.151.51.31
101	10.151.51.32/29	10.151.51.33 – 10.151.51.38	10.151.51.39
102	10.151.51.40/29	10.151.51.41 – 10.151.51.46	10.151.51.47
103	10.151.51.48/29	10.151.51.49 – 10.151.51.54	10.151.51.55
104	10.151.51.56/29	10.151.51.57 – 10.151.51.62	10.151.51.63
105	10.151.51.64/29	10.151.51.65 – 10.151.51.70	10.151.51.71
106	10.151.51.72/29	10.151.51.73 – 10.151.51.78	10.151.51.79
107	10.151.51.80/29	10.151.51.81 – 10.151.51.86	10.151.51.87
108	10.151.51.88/29	10.151.51.89 – 10.151.51.94	10.151.51.95
109	10.151.51.96/29	10.151.51.97 – 10.151.51.102	10.151.51.103
110	10.151.51.104/29	10.151.51.105 – 10.151.51.110	10.151.51.111
111	10.151.51.112/29	10.151.51.113 – 10.151.51.118	10.151.51.119
112	10.151.51.120/29	10.151.51.121 – 10.151.51.126	10.151.51.127
113	10.151.51.128/29	10.151.51.129 – 10.151.51.134	10.151.51.135
114	10.151.51.136/29	10.151.51.137 – 10.151.51.142	10.151.51.143
115	10.151.51.144/29	10.151.51.145 – 10.151.51.150	10.151.51.151
116	10.151.51.152/29	10.151.51.153 – 10.151.51.158	10.151.51.159
117	10.151.51.160/29	10.151.51.161 – 10.151.51.166	10.151.51.167
118	10.151.51.168/29	10.151.51.169 – 10.151.51.174	10.151.51.175
119	10.151.51.176/29	10.151.51.177 – 10.151.51.182	10.151.51.183
120	10.151.51.184/29	10.151.51.185 – 10.151.51.190	10.151.51.191
121	10.151.51.192/29	10.151.51.193 – 10.151.51.198	10.151.51.199
122	10.151.51.200/29	10.151.51.201 – 10.151.51.206	10.151.51.207
123	10.151.51.208/29	10.151.51.209 – 10.151.51.214	10.151.51.215
124	10.151.51.216/29	10.151.51.217 – 10.151.51.222	10.151.51.223
125	10.151.51.224/29	10.151.51.225 – 10.151.51.230	10.151.51.231
126	10.151.51.232/29	10.151.51.233 – 10.151.51.238	10.151.51.239
127	10.151.51.240/29	10.151.51.241 – 10.151.51.246	10.151.51.247
128	10.151.51.248/29	10.151.51.249 – 10.151.51.254	10.151.51.255

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 →