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)10.167.112.0/25

network10.167.112.0/25

broadcast10.167.112.127

first host10.167.112.1

last host10.167.112.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.112.0/25

address00001010.10100111.01110000.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01110000.00000000

broadcast00001010.10100111.01110000.01111111

green = network part, grey = host part

hex0x0aa77000

decimal178745344

reverse dns0.112.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7000

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.112.0/32	10.167.112.0 – 10.167.112.0	10.167.112.0
2	10.167.112.1/32	10.167.112.1 – 10.167.112.1	10.167.112.1
3	10.167.112.2/32	10.167.112.2 – 10.167.112.2	10.167.112.2
4	10.167.112.3/32	10.167.112.3 – 10.167.112.3	10.167.112.3
5	10.167.112.4/32	10.167.112.4 – 10.167.112.4	10.167.112.4
6	10.167.112.5/32	10.167.112.5 – 10.167.112.5	10.167.112.5
7	10.167.112.6/32	10.167.112.6 – 10.167.112.6	10.167.112.6
8	10.167.112.7/32	10.167.112.7 – 10.167.112.7	10.167.112.7
9	10.167.112.8/32	10.167.112.8 – 10.167.112.8	10.167.112.8
10	10.167.112.9/32	10.167.112.9 – 10.167.112.9	10.167.112.9
11	10.167.112.10/32	10.167.112.10 – 10.167.112.10	10.167.112.10
12	10.167.112.11/32	10.167.112.11 – 10.167.112.11	10.167.112.11
13	10.167.112.12/32	10.167.112.12 – 10.167.112.12	10.167.112.12
14	10.167.112.13/32	10.167.112.13 – 10.167.112.13	10.167.112.13
15	10.167.112.14/32	10.167.112.14 – 10.167.112.14	10.167.112.14
16	10.167.112.15/32	10.167.112.15 – 10.167.112.15	10.167.112.15
17	10.167.112.16/32	10.167.112.16 – 10.167.112.16	10.167.112.16
18	10.167.112.17/32	10.167.112.17 – 10.167.112.17	10.167.112.17
19	10.167.112.18/32	10.167.112.18 – 10.167.112.18	10.167.112.18
20	10.167.112.19/32	10.167.112.19 – 10.167.112.19	10.167.112.19
21	10.167.112.20/32	10.167.112.20 – 10.167.112.20	10.167.112.20
22	10.167.112.21/32	10.167.112.21 – 10.167.112.21	10.167.112.21
23	10.167.112.22/32	10.167.112.22 – 10.167.112.22	10.167.112.22
24	10.167.112.23/32	10.167.112.23 – 10.167.112.23	10.167.112.23
25	10.167.112.24/32	10.167.112.24 – 10.167.112.24	10.167.112.24
26	10.167.112.25/32	10.167.112.25 – 10.167.112.25	10.167.112.25
27	10.167.112.26/32	10.167.112.26 – 10.167.112.26	10.167.112.26
28	10.167.112.27/32	10.167.112.27 – 10.167.112.27	10.167.112.27
29	10.167.112.28/32	10.167.112.28 – 10.167.112.28	10.167.112.28
30	10.167.112.29/32	10.167.112.29 – 10.167.112.29	10.167.112.29
31	10.167.112.30/32	10.167.112.30 – 10.167.112.30	10.167.112.30
32	10.167.112.31/32	10.167.112.31 – 10.167.112.31	10.167.112.31
33	10.167.112.32/32	10.167.112.32 – 10.167.112.32	10.167.112.32
34	10.167.112.33/32	10.167.112.33 – 10.167.112.33	10.167.112.33
35	10.167.112.34/32	10.167.112.34 – 10.167.112.34	10.167.112.34
36	10.167.112.35/32	10.167.112.35 – 10.167.112.35	10.167.112.35
37	10.167.112.36/32	10.167.112.36 – 10.167.112.36	10.167.112.36
38	10.167.112.37/32	10.167.112.37 – 10.167.112.37	10.167.112.37
39	10.167.112.38/32	10.167.112.38 – 10.167.112.38	10.167.112.38
40	10.167.112.39/32	10.167.112.39 – 10.167.112.39	10.167.112.39
41	10.167.112.40/32	10.167.112.40 – 10.167.112.40	10.167.112.40
42	10.167.112.41/32	10.167.112.41 – 10.167.112.41	10.167.112.41
43	10.167.112.42/32	10.167.112.42 – 10.167.112.42	10.167.112.42
44	10.167.112.43/32	10.167.112.43 – 10.167.112.43	10.167.112.43
45	10.167.112.44/32	10.167.112.44 – 10.167.112.44	10.167.112.44
46	10.167.112.45/32	10.167.112.45 – 10.167.112.45	10.167.112.45
47	10.167.112.46/32	10.167.112.46 – 10.167.112.46	10.167.112.46
48	10.167.112.47/32	10.167.112.47 – 10.167.112.47	10.167.112.47
49	10.167.112.48/32	10.167.112.48 – 10.167.112.48	10.167.112.48
50	10.167.112.49/32	10.167.112.49 – 10.167.112.49	10.167.112.49
51	10.167.112.50/32	10.167.112.50 – 10.167.112.50	10.167.112.50
52	10.167.112.51/32	10.167.112.51 – 10.167.112.51	10.167.112.51
53	10.167.112.52/32	10.167.112.52 – 10.167.112.52	10.167.112.52
54	10.167.112.53/32	10.167.112.53 – 10.167.112.53	10.167.112.53
55	10.167.112.54/32	10.167.112.54 – 10.167.112.54	10.167.112.54
56	10.167.112.55/32	10.167.112.55 – 10.167.112.55	10.167.112.55
57	10.167.112.56/32	10.167.112.56 – 10.167.112.56	10.167.112.56
58	10.167.112.57/32	10.167.112.57 – 10.167.112.57	10.167.112.57
59	10.167.112.58/32	10.167.112.58 – 10.167.112.58	10.167.112.58
60	10.167.112.59/32	10.167.112.59 – 10.167.112.59	10.167.112.59
61	10.167.112.60/32	10.167.112.60 – 10.167.112.60	10.167.112.60
62	10.167.112.61/32	10.167.112.61 – 10.167.112.61	10.167.112.61
63	10.167.112.62/32	10.167.112.62 – 10.167.112.62	10.167.112.62
64	10.167.112.63/32	10.167.112.63 – 10.167.112.63	10.167.112.63
65	10.167.112.64/32	10.167.112.64 – 10.167.112.64	10.167.112.64
66	10.167.112.65/32	10.167.112.65 – 10.167.112.65	10.167.112.65
67	10.167.112.66/32	10.167.112.66 – 10.167.112.66	10.167.112.66
68	10.167.112.67/32	10.167.112.67 – 10.167.112.67	10.167.112.67
69	10.167.112.68/32	10.167.112.68 – 10.167.112.68	10.167.112.68
70	10.167.112.69/32	10.167.112.69 – 10.167.112.69	10.167.112.69
71	10.167.112.70/32	10.167.112.70 – 10.167.112.70	10.167.112.70
72	10.167.112.71/32	10.167.112.71 – 10.167.112.71	10.167.112.71
73	10.167.112.72/32	10.167.112.72 – 10.167.112.72	10.167.112.72
74	10.167.112.73/32	10.167.112.73 – 10.167.112.73	10.167.112.73
75	10.167.112.74/32	10.167.112.74 – 10.167.112.74	10.167.112.74
76	10.167.112.75/32	10.167.112.75 – 10.167.112.75	10.167.112.75
77	10.167.112.76/32	10.167.112.76 – 10.167.112.76	10.167.112.76
78	10.167.112.77/32	10.167.112.77 – 10.167.112.77	10.167.112.77
79	10.167.112.78/32	10.167.112.78 – 10.167.112.78	10.167.112.78
80	10.167.112.79/32	10.167.112.79 – 10.167.112.79	10.167.112.79
81	10.167.112.80/32	10.167.112.80 – 10.167.112.80	10.167.112.80
82	10.167.112.81/32	10.167.112.81 – 10.167.112.81	10.167.112.81
83	10.167.112.82/32	10.167.112.82 – 10.167.112.82	10.167.112.82
84	10.167.112.83/32	10.167.112.83 – 10.167.112.83	10.167.112.83
85	10.167.112.84/32	10.167.112.84 – 10.167.112.84	10.167.112.84
86	10.167.112.85/32	10.167.112.85 – 10.167.112.85	10.167.112.85
87	10.167.112.86/32	10.167.112.86 – 10.167.112.86	10.167.112.86
88	10.167.112.87/32	10.167.112.87 – 10.167.112.87	10.167.112.87
89	10.167.112.88/32	10.167.112.88 – 10.167.112.88	10.167.112.88
90	10.167.112.89/32	10.167.112.89 – 10.167.112.89	10.167.112.89
91	10.167.112.90/32	10.167.112.90 – 10.167.112.90	10.167.112.90
92	10.167.112.91/32	10.167.112.91 – 10.167.112.91	10.167.112.91
93	10.167.112.92/32	10.167.112.92 – 10.167.112.92	10.167.112.92
94	10.167.112.93/32	10.167.112.93 – 10.167.112.93	10.167.112.93
95	10.167.112.94/32	10.167.112.94 – 10.167.112.94	10.167.112.94
96	10.167.112.95/32	10.167.112.95 – 10.167.112.95	10.167.112.95
97	10.167.112.96/32	10.167.112.96 – 10.167.112.96	10.167.112.96
98	10.167.112.97/32	10.167.112.97 – 10.167.112.97	10.167.112.97
99	10.167.112.98/32	10.167.112.98 – 10.167.112.98	10.167.112.98
100	10.167.112.99/32	10.167.112.99 – 10.167.112.99	10.167.112.99
101	10.167.112.100/32	10.167.112.100 – 10.167.112.100	10.167.112.100
102	10.167.112.101/32	10.167.112.101 – 10.167.112.101	10.167.112.101
103	10.167.112.102/32	10.167.112.102 – 10.167.112.102	10.167.112.102
104	10.167.112.103/32	10.167.112.103 – 10.167.112.103	10.167.112.103
105	10.167.112.104/32	10.167.112.104 – 10.167.112.104	10.167.112.104
106	10.167.112.105/32	10.167.112.105 – 10.167.112.105	10.167.112.105
107	10.167.112.106/32	10.167.112.106 – 10.167.112.106	10.167.112.106
108	10.167.112.107/32	10.167.112.107 – 10.167.112.107	10.167.112.107
109	10.167.112.108/32	10.167.112.108 – 10.167.112.108	10.167.112.108
110	10.167.112.109/32	10.167.112.109 – 10.167.112.109	10.167.112.109
111	10.167.112.110/32	10.167.112.110 – 10.167.112.110	10.167.112.110
112	10.167.112.111/32	10.167.112.111 – 10.167.112.111	10.167.112.111
113	10.167.112.112/32	10.167.112.112 – 10.167.112.112	10.167.112.112
114	10.167.112.113/32	10.167.112.113 – 10.167.112.113	10.167.112.113
115	10.167.112.114/32	10.167.112.114 – 10.167.112.114	10.167.112.114
116	10.167.112.115/32	10.167.112.115 – 10.167.112.115	10.167.112.115
117	10.167.112.116/32	10.167.112.116 – 10.167.112.116	10.167.112.116
118	10.167.112.117/32	10.167.112.117 – 10.167.112.117	10.167.112.117
119	10.167.112.118/32	10.167.112.118 – 10.167.112.118	10.167.112.118
120	10.167.112.119/32	10.167.112.119 – 10.167.112.119	10.167.112.119
121	10.167.112.120/32	10.167.112.120 – 10.167.112.120	10.167.112.120
122	10.167.112.121/32	10.167.112.121 – 10.167.112.121	10.167.112.121
123	10.167.112.122/32	10.167.112.122 – 10.167.112.122	10.167.112.122
124	10.167.112.123/32	10.167.112.123 – 10.167.112.123	10.167.112.123
125	10.167.112.124/32	10.167.112.124 – 10.167.112.124	10.167.112.124
126	10.167.112.125/32	10.167.112.125 – 10.167.112.125	10.167.112.125
127	10.167.112.126/32	10.167.112.126 – 10.167.112.126	10.167.112.126
128	10.167.112.127/32	10.167.112.127 – 10.167.112.127	10.167.112.127

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 →