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)10.167.116.0/25

network10.167.116.0/25

broadcast10.167.116.127

first host10.167.116.1

last host10.167.116.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.116.0/25

address00001010.10100111.01110100.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01110100.00000000

broadcast00001010.10100111.01110100.01111111

green = network part, grey = host part

hex0x0aa77400

decimal178746368

reverse dns0.116.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7400

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.116.0/32	10.167.116.0 – 10.167.116.0	10.167.116.0
2	10.167.116.1/32	10.167.116.1 – 10.167.116.1	10.167.116.1
3	10.167.116.2/32	10.167.116.2 – 10.167.116.2	10.167.116.2
4	10.167.116.3/32	10.167.116.3 – 10.167.116.3	10.167.116.3
5	10.167.116.4/32	10.167.116.4 – 10.167.116.4	10.167.116.4
6	10.167.116.5/32	10.167.116.5 – 10.167.116.5	10.167.116.5
7	10.167.116.6/32	10.167.116.6 – 10.167.116.6	10.167.116.6
8	10.167.116.7/32	10.167.116.7 – 10.167.116.7	10.167.116.7
9	10.167.116.8/32	10.167.116.8 – 10.167.116.8	10.167.116.8
10	10.167.116.9/32	10.167.116.9 – 10.167.116.9	10.167.116.9
11	10.167.116.10/32	10.167.116.10 – 10.167.116.10	10.167.116.10
12	10.167.116.11/32	10.167.116.11 – 10.167.116.11	10.167.116.11
13	10.167.116.12/32	10.167.116.12 – 10.167.116.12	10.167.116.12
14	10.167.116.13/32	10.167.116.13 – 10.167.116.13	10.167.116.13
15	10.167.116.14/32	10.167.116.14 – 10.167.116.14	10.167.116.14
16	10.167.116.15/32	10.167.116.15 – 10.167.116.15	10.167.116.15
17	10.167.116.16/32	10.167.116.16 – 10.167.116.16	10.167.116.16
18	10.167.116.17/32	10.167.116.17 – 10.167.116.17	10.167.116.17
19	10.167.116.18/32	10.167.116.18 – 10.167.116.18	10.167.116.18
20	10.167.116.19/32	10.167.116.19 – 10.167.116.19	10.167.116.19
21	10.167.116.20/32	10.167.116.20 – 10.167.116.20	10.167.116.20
22	10.167.116.21/32	10.167.116.21 – 10.167.116.21	10.167.116.21
23	10.167.116.22/32	10.167.116.22 – 10.167.116.22	10.167.116.22
24	10.167.116.23/32	10.167.116.23 – 10.167.116.23	10.167.116.23
25	10.167.116.24/32	10.167.116.24 – 10.167.116.24	10.167.116.24
26	10.167.116.25/32	10.167.116.25 – 10.167.116.25	10.167.116.25
27	10.167.116.26/32	10.167.116.26 – 10.167.116.26	10.167.116.26
28	10.167.116.27/32	10.167.116.27 – 10.167.116.27	10.167.116.27
29	10.167.116.28/32	10.167.116.28 – 10.167.116.28	10.167.116.28
30	10.167.116.29/32	10.167.116.29 – 10.167.116.29	10.167.116.29
31	10.167.116.30/32	10.167.116.30 – 10.167.116.30	10.167.116.30
32	10.167.116.31/32	10.167.116.31 – 10.167.116.31	10.167.116.31
33	10.167.116.32/32	10.167.116.32 – 10.167.116.32	10.167.116.32
34	10.167.116.33/32	10.167.116.33 – 10.167.116.33	10.167.116.33
35	10.167.116.34/32	10.167.116.34 – 10.167.116.34	10.167.116.34
36	10.167.116.35/32	10.167.116.35 – 10.167.116.35	10.167.116.35
37	10.167.116.36/32	10.167.116.36 – 10.167.116.36	10.167.116.36
38	10.167.116.37/32	10.167.116.37 – 10.167.116.37	10.167.116.37
39	10.167.116.38/32	10.167.116.38 – 10.167.116.38	10.167.116.38
40	10.167.116.39/32	10.167.116.39 – 10.167.116.39	10.167.116.39
41	10.167.116.40/32	10.167.116.40 – 10.167.116.40	10.167.116.40
42	10.167.116.41/32	10.167.116.41 – 10.167.116.41	10.167.116.41
43	10.167.116.42/32	10.167.116.42 – 10.167.116.42	10.167.116.42
44	10.167.116.43/32	10.167.116.43 – 10.167.116.43	10.167.116.43
45	10.167.116.44/32	10.167.116.44 – 10.167.116.44	10.167.116.44
46	10.167.116.45/32	10.167.116.45 – 10.167.116.45	10.167.116.45
47	10.167.116.46/32	10.167.116.46 – 10.167.116.46	10.167.116.46
48	10.167.116.47/32	10.167.116.47 – 10.167.116.47	10.167.116.47
49	10.167.116.48/32	10.167.116.48 – 10.167.116.48	10.167.116.48
50	10.167.116.49/32	10.167.116.49 – 10.167.116.49	10.167.116.49
51	10.167.116.50/32	10.167.116.50 – 10.167.116.50	10.167.116.50
52	10.167.116.51/32	10.167.116.51 – 10.167.116.51	10.167.116.51
53	10.167.116.52/32	10.167.116.52 – 10.167.116.52	10.167.116.52
54	10.167.116.53/32	10.167.116.53 – 10.167.116.53	10.167.116.53
55	10.167.116.54/32	10.167.116.54 – 10.167.116.54	10.167.116.54
56	10.167.116.55/32	10.167.116.55 – 10.167.116.55	10.167.116.55
57	10.167.116.56/32	10.167.116.56 – 10.167.116.56	10.167.116.56
58	10.167.116.57/32	10.167.116.57 – 10.167.116.57	10.167.116.57
59	10.167.116.58/32	10.167.116.58 – 10.167.116.58	10.167.116.58
60	10.167.116.59/32	10.167.116.59 – 10.167.116.59	10.167.116.59
61	10.167.116.60/32	10.167.116.60 – 10.167.116.60	10.167.116.60
62	10.167.116.61/32	10.167.116.61 – 10.167.116.61	10.167.116.61
63	10.167.116.62/32	10.167.116.62 – 10.167.116.62	10.167.116.62
64	10.167.116.63/32	10.167.116.63 – 10.167.116.63	10.167.116.63
65	10.167.116.64/32	10.167.116.64 – 10.167.116.64	10.167.116.64
66	10.167.116.65/32	10.167.116.65 – 10.167.116.65	10.167.116.65
67	10.167.116.66/32	10.167.116.66 – 10.167.116.66	10.167.116.66
68	10.167.116.67/32	10.167.116.67 – 10.167.116.67	10.167.116.67
69	10.167.116.68/32	10.167.116.68 – 10.167.116.68	10.167.116.68
70	10.167.116.69/32	10.167.116.69 – 10.167.116.69	10.167.116.69
71	10.167.116.70/32	10.167.116.70 – 10.167.116.70	10.167.116.70
72	10.167.116.71/32	10.167.116.71 – 10.167.116.71	10.167.116.71
73	10.167.116.72/32	10.167.116.72 – 10.167.116.72	10.167.116.72
74	10.167.116.73/32	10.167.116.73 – 10.167.116.73	10.167.116.73
75	10.167.116.74/32	10.167.116.74 – 10.167.116.74	10.167.116.74
76	10.167.116.75/32	10.167.116.75 – 10.167.116.75	10.167.116.75
77	10.167.116.76/32	10.167.116.76 – 10.167.116.76	10.167.116.76
78	10.167.116.77/32	10.167.116.77 – 10.167.116.77	10.167.116.77
79	10.167.116.78/32	10.167.116.78 – 10.167.116.78	10.167.116.78
80	10.167.116.79/32	10.167.116.79 – 10.167.116.79	10.167.116.79
81	10.167.116.80/32	10.167.116.80 – 10.167.116.80	10.167.116.80
82	10.167.116.81/32	10.167.116.81 – 10.167.116.81	10.167.116.81
83	10.167.116.82/32	10.167.116.82 – 10.167.116.82	10.167.116.82
84	10.167.116.83/32	10.167.116.83 – 10.167.116.83	10.167.116.83
85	10.167.116.84/32	10.167.116.84 – 10.167.116.84	10.167.116.84
86	10.167.116.85/32	10.167.116.85 – 10.167.116.85	10.167.116.85
87	10.167.116.86/32	10.167.116.86 – 10.167.116.86	10.167.116.86
88	10.167.116.87/32	10.167.116.87 – 10.167.116.87	10.167.116.87
89	10.167.116.88/32	10.167.116.88 – 10.167.116.88	10.167.116.88
90	10.167.116.89/32	10.167.116.89 – 10.167.116.89	10.167.116.89
91	10.167.116.90/32	10.167.116.90 – 10.167.116.90	10.167.116.90
92	10.167.116.91/32	10.167.116.91 – 10.167.116.91	10.167.116.91
93	10.167.116.92/32	10.167.116.92 – 10.167.116.92	10.167.116.92
94	10.167.116.93/32	10.167.116.93 – 10.167.116.93	10.167.116.93
95	10.167.116.94/32	10.167.116.94 – 10.167.116.94	10.167.116.94
96	10.167.116.95/32	10.167.116.95 – 10.167.116.95	10.167.116.95
97	10.167.116.96/32	10.167.116.96 – 10.167.116.96	10.167.116.96
98	10.167.116.97/32	10.167.116.97 – 10.167.116.97	10.167.116.97
99	10.167.116.98/32	10.167.116.98 – 10.167.116.98	10.167.116.98
100	10.167.116.99/32	10.167.116.99 – 10.167.116.99	10.167.116.99
101	10.167.116.100/32	10.167.116.100 – 10.167.116.100	10.167.116.100
102	10.167.116.101/32	10.167.116.101 – 10.167.116.101	10.167.116.101
103	10.167.116.102/32	10.167.116.102 – 10.167.116.102	10.167.116.102
104	10.167.116.103/32	10.167.116.103 – 10.167.116.103	10.167.116.103
105	10.167.116.104/32	10.167.116.104 – 10.167.116.104	10.167.116.104
106	10.167.116.105/32	10.167.116.105 – 10.167.116.105	10.167.116.105
107	10.167.116.106/32	10.167.116.106 – 10.167.116.106	10.167.116.106
108	10.167.116.107/32	10.167.116.107 – 10.167.116.107	10.167.116.107
109	10.167.116.108/32	10.167.116.108 – 10.167.116.108	10.167.116.108
110	10.167.116.109/32	10.167.116.109 – 10.167.116.109	10.167.116.109
111	10.167.116.110/32	10.167.116.110 – 10.167.116.110	10.167.116.110
112	10.167.116.111/32	10.167.116.111 – 10.167.116.111	10.167.116.111
113	10.167.116.112/32	10.167.116.112 – 10.167.116.112	10.167.116.112
114	10.167.116.113/32	10.167.116.113 – 10.167.116.113	10.167.116.113
115	10.167.116.114/32	10.167.116.114 – 10.167.116.114	10.167.116.114
116	10.167.116.115/32	10.167.116.115 – 10.167.116.115	10.167.116.115
117	10.167.116.116/32	10.167.116.116 – 10.167.116.116	10.167.116.116
118	10.167.116.117/32	10.167.116.117 – 10.167.116.117	10.167.116.117
119	10.167.116.118/32	10.167.116.118 – 10.167.116.118	10.167.116.118
120	10.167.116.119/32	10.167.116.119 – 10.167.116.119	10.167.116.119
121	10.167.116.120/32	10.167.116.120 – 10.167.116.120	10.167.116.120
122	10.167.116.121/32	10.167.116.121 – 10.167.116.121	10.167.116.121
123	10.167.116.122/32	10.167.116.122 – 10.167.116.122	10.167.116.122
124	10.167.116.123/32	10.167.116.123 – 10.167.116.123	10.167.116.123
125	10.167.116.124/32	10.167.116.124 – 10.167.116.124	10.167.116.124
126	10.167.116.125/32	10.167.116.125 – 10.167.116.125	10.167.116.125
127	10.167.116.126/32	10.167.116.126 – 10.167.116.126	10.167.116.126
128	10.167.116.127/32	10.167.116.127 – 10.167.116.127	10.167.116.127

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 /25
/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	-
/23	255.255.254.0	512	510	-
/24	255.255.255.0	256	254	-
/25	255.255.255.128	128	126	1
/26	255.255.255.192	64	62	2 split →
/27	255.255.255.224	32	30	4 split →
/28	255.255.255.240	16	14	8 split →
/29	255.255.255.248	8	6	16 split →
/30	255.255.255.252	4	2	32 split →
/31	255.255.255.254	2	2	64 split →
/32	255.255.255.255	1	1	128 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 →