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)10.167.108.0/25

network10.167.108.0/25

broadcast10.167.108.127

first host10.167.108.1

last host10.167.108.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.108.0/25

address00001010.10100111.01101100.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01101100.00000000

broadcast00001010.10100111.01101100.01111111

green = network part, grey = host part

hex0x0aa76c00

decimal178744320

reverse dns0.108.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:6c00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.108.0/32	10.167.108.0 – 10.167.108.0	10.167.108.0
2	10.167.108.1/32	10.167.108.1 – 10.167.108.1	10.167.108.1
3	10.167.108.2/32	10.167.108.2 – 10.167.108.2	10.167.108.2
4	10.167.108.3/32	10.167.108.3 – 10.167.108.3	10.167.108.3
5	10.167.108.4/32	10.167.108.4 – 10.167.108.4	10.167.108.4
6	10.167.108.5/32	10.167.108.5 – 10.167.108.5	10.167.108.5
7	10.167.108.6/32	10.167.108.6 – 10.167.108.6	10.167.108.6
8	10.167.108.7/32	10.167.108.7 – 10.167.108.7	10.167.108.7
9	10.167.108.8/32	10.167.108.8 – 10.167.108.8	10.167.108.8
10	10.167.108.9/32	10.167.108.9 – 10.167.108.9	10.167.108.9
11	10.167.108.10/32	10.167.108.10 – 10.167.108.10	10.167.108.10
12	10.167.108.11/32	10.167.108.11 – 10.167.108.11	10.167.108.11
13	10.167.108.12/32	10.167.108.12 – 10.167.108.12	10.167.108.12
14	10.167.108.13/32	10.167.108.13 – 10.167.108.13	10.167.108.13
15	10.167.108.14/32	10.167.108.14 – 10.167.108.14	10.167.108.14
16	10.167.108.15/32	10.167.108.15 – 10.167.108.15	10.167.108.15
17	10.167.108.16/32	10.167.108.16 – 10.167.108.16	10.167.108.16
18	10.167.108.17/32	10.167.108.17 – 10.167.108.17	10.167.108.17
19	10.167.108.18/32	10.167.108.18 – 10.167.108.18	10.167.108.18
20	10.167.108.19/32	10.167.108.19 – 10.167.108.19	10.167.108.19
21	10.167.108.20/32	10.167.108.20 – 10.167.108.20	10.167.108.20
22	10.167.108.21/32	10.167.108.21 – 10.167.108.21	10.167.108.21
23	10.167.108.22/32	10.167.108.22 – 10.167.108.22	10.167.108.22
24	10.167.108.23/32	10.167.108.23 – 10.167.108.23	10.167.108.23
25	10.167.108.24/32	10.167.108.24 – 10.167.108.24	10.167.108.24
26	10.167.108.25/32	10.167.108.25 – 10.167.108.25	10.167.108.25
27	10.167.108.26/32	10.167.108.26 – 10.167.108.26	10.167.108.26
28	10.167.108.27/32	10.167.108.27 – 10.167.108.27	10.167.108.27
29	10.167.108.28/32	10.167.108.28 – 10.167.108.28	10.167.108.28
30	10.167.108.29/32	10.167.108.29 – 10.167.108.29	10.167.108.29
31	10.167.108.30/32	10.167.108.30 – 10.167.108.30	10.167.108.30
32	10.167.108.31/32	10.167.108.31 – 10.167.108.31	10.167.108.31
33	10.167.108.32/32	10.167.108.32 – 10.167.108.32	10.167.108.32
34	10.167.108.33/32	10.167.108.33 – 10.167.108.33	10.167.108.33
35	10.167.108.34/32	10.167.108.34 – 10.167.108.34	10.167.108.34
36	10.167.108.35/32	10.167.108.35 – 10.167.108.35	10.167.108.35
37	10.167.108.36/32	10.167.108.36 – 10.167.108.36	10.167.108.36
38	10.167.108.37/32	10.167.108.37 – 10.167.108.37	10.167.108.37
39	10.167.108.38/32	10.167.108.38 – 10.167.108.38	10.167.108.38
40	10.167.108.39/32	10.167.108.39 – 10.167.108.39	10.167.108.39
41	10.167.108.40/32	10.167.108.40 – 10.167.108.40	10.167.108.40
42	10.167.108.41/32	10.167.108.41 – 10.167.108.41	10.167.108.41
43	10.167.108.42/32	10.167.108.42 – 10.167.108.42	10.167.108.42
44	10.167.108.43/32	10.167.108.43 – 10.167.108.43	10.167.108.43
45	10.167.108.44/32	10.167.108.44 – 10.167.108.44	10.167.108.44
46	10.167.108.45/32	10.167.108.45 – 10.167.108.45	10.167.108.45
47	10.167.108.46/32	10.167.108.46 – 10.167.108.46	10.167.108.46
48	10.167.108.47/32	10.167.108.47 – 10.167.108.47	10.167.108.47
49	10.167.108.48/32	10.167.108.48 – 10.167.108.48	10.167.108.48
50	10.167.108.49/32	10.167.108.49 – 10.167.108.49	10.167.108.49
51	10.167.108.50/32	10.167.108.50 – 10.167.108.50	10.167.108.50
52	10.167.108.51/32	10.167.108.51 – 10.167.108.51	10.167.108.51
53	10.167.108.52/32	10.167.108.52 – 10.167.108.52	10.167.108.52
54	10.167.108.53/32	10.167.108.53 – 10.167.108.53	10.167.108.53
55	10.167.108.54/32	10.167.108.54 – 10.167.108.54	10.167.108.54
56	10.167.108.55/32	10.167.108.55 – 10.167.108.55	10.167.108.55
57	10.167.108.56/32	10.167.108.56 – 10.167.108.56	10.167.108.56
58	10.167.108.57/32	10.167.108.57 – 10.167.108.57	10.167.108.57
59	10.167.108.58/32	10.167.108.58 – 10.167.108.58	10.167.108.58
60	10.167.108.59/32	10.167.108.59 – 10.167.108.59	10.167.108.59
61	10.167.108.60/32	10.167.108.60 – 10.167.108.60	10.167.108.60
62	10.167.108.61/32	10.167.108.61 – 10.167.108.61	10.167.108.61
63	10.167.108.62/32	10.167.108.62 – 10.167.108.62	10.167.108.62
64	10.167.108.63/32	10.167.108.63 – 10.167.108.63	10.167.108.63
65	10.167.108.64/32	10.167.108.64 – 10.167.108.64	10.167.108.64
66	10.167.108.65/32	10.167.108.65 – 10.167.108.65	10.167.108.65
67	10.167.108.66/32	10.167.108.66 – 10.167.108.66	10.167.108.66
68	10.167.108.67/32	10.167.108.67 – 10.167.108.67	10.167.108.67
69	10.167.108.68/32	10.167.108.68 – 10.167.108.68	10.167.108.68
70	10.167.108.69/32	10.167.108.69 – 10.167.108.69	10.167.108.69
71	10.167.108.70/32	10.167.108.70 – 10.167.108.70	10.167.108.70
72	10.167.108.71/32	10.167.108.71 – 10.167.108.71	10.167.108.71
73	10.167.108.72/32	10.167.108.72 – 10.167.108.72	10.167.108.72
74	10.167.108.73/32	10.167.108.73 – 10.167.108.73	10.167.108.73
75	10.167.108.74/32	10.167.108.74 – 10.167.108.74	10.167.108.74
76	10.167.108.75/32	10.167.108.75 – 10.167.108.75	10.167.108.75
77	10.167.108.76/32	10.167.108.76 – 10.167.108.76	10.167.108.76
78	10.167.108.77/32	10.167.108.77 – 10.167.108.77	10.167.108.77
79	10.167.108.78/32	10.167.108.78 – 10.167.108.78	10.167.108.78
80	10.167.108.79/32	10.167.108.79 – 10.167.108.79	10.167.108.79
81	10.167.108.80/32	10.167.108.80 – 10.167.108.80	10.167.108.80
82	10.167.108.81/32	10.167.108.81 – 10.167.108.81	10.167.108.81
83	10.167.108.82/32	10.167.108.82 – 10.167.108.82	10.167.108.82
84	10.167.108.83/32	10.167.108.83 – 10.167.108.83	10.167.108.83
85	10.167.108.84/32	10.167.108.84 – 10.167.108.84	10.167.108.84
86	10.167.108.85/32	10.167.108.85 – 10.167.108.85	10.167.108.85
87	10.167.108.86/32	10.167.108.86 – 10.167.108.86	10.167.108.86
88	10.167.108.87/32	10.167.108.87 – 10.167.108.87	10.167.108.87
89	10.167.108.88/32	10.167.108.88 – 10.167.108.88	10.167.108.88
90	10.167.108.89/32	10.167.108.89 – 10.167.108.89	10.167.108.89
91	10.167.108.90/32	10.167.108.90 – 10.167.108.90	10.167.108.90
92	10.167.108.91/32	10.167.108.91 – 10.167.108.91	10.167.108.91
93	10.167.108.92/32	10.167.108.92 – 10.167.108.92	10.167.108.92
94	10.167.108.93/32	10.167.108.93 – 10.167.108.93	10.167.108.93
95	10.167.108.94/32	10.167.108.94 – 10.167.108.94	10.167.108.94
96	10.167.108.95/32	10.167.108.95 – 10.167.108.95	10.167.108.95
97	10.167.108.96/32	10.167.108.96 – 10.167.108.96	10.167.108.96
98	10.167.108.97/32	10.167.108.97 – 10.167.108.97	10.167.108.97
99	10.167.108.98/32	10.167.108.98 – 10.167.108.98	10.167.108.98
100	10.167.108.99/32	10.167.108.99 – 10.167.108.99	10.167.108.99
101	10.167.108.100/32	10.167.108.100 – 10.167.108.100	10.167.108.100
102	10.167.108.101/32	10.167.108.101 – 10.167.108.101	10.167.108.101
103	10.167.108.102/32	10.167.108.102 – 10.167.108.102	10.167.108.102
104	10.167.108.103/32	10.167.108.103 – 10.167.108.103	10.167.108.103
105	10.167.108.104/32	10.167.108.104 – 10.167.108.104	10.167.108.104
106	10.167.108.105/32	10.167.108.105 – 10.167.108.105	10.167.108.105
107	10.167.108.106/32	10.167.108.106 – 10.167.108.106	10.167.108.106
108	10.167.108.107/32	10.167.108.107 – 10.167.108.107	10.167.108.107
109	10.167.108.108/32	10.167.108.108 – 10.167.108.108	10.167.108.108
110	10.167.108.109/32	10.167.108.109 – 10.167.108.109	10.167.108.109
111	10.167.108.110/32	10.167.108.110 – 10.167.108.110	10.167.108.110
112	10.167.108.111/32	10.167.108.111 – 10.167.108.111	10.167.108.111
113	10.167.108.112/32	10.167.108.112 – 10.167.108.112	10.167.108.112
114	10.167.108.113/32	10.167.108.113 – 10.167.108.113	10.167.108.113
115	10.167.108.114/32	10.167.108.114 – 10.167.108.114	10.167.108.114
116	10.167.108.115/32	10.167.108.115 – 10.167.108.115	10.167.108.115
117	10.167.108.116/32	10.167.108.116 – 10.167.108.116	10.167.108.116
118	10.167.108.117/32	10.167.108.117 – 10.167.108.117	10.167.108.117
119	10.167.108.118/32	10.167.108.118 – 10.167.108.118	10.167.108.118
120	10.167.108.119/32	10.167.108.119 – 10.167.108.119	10.167.108.119
121	10.167.108.120/32	10.167.108.120 – 10.167.108.120	10.167.108.120
122	10.167.108.121/32	10.167.108.121 – 10.167.108.121	10.167.108.121
123	10.167.108.122/32	10.167.108.122 – 10.167.108.122	10.167.108.122
124	10.167.108.123/32	10.167.108.123 – 10.167.108.123	10.167.108.123
125	10.167.108.124/32	10.167.108.124 – 10.167.108.124	10.167.108.124
126	10.167.108.125/32	10.167.108.125 – 10.167.108.125	10.167.108.125
127	10.167.108.126/32	10.167.108.126 – 10.167.108.126	10.167.108.126
128	10.167.108.127/32	10.167.108.127 – 10.167.108.127	10.167.108.127

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 →