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)10.167.113.0/25

network10.167.113.0/25

broadcast10.167.113.127

first host10.167.113.1

last host10.167.113.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.113.0/25

address00001010.10100111.01110001.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01110001.00000000

broadcast00001010.10100111.01110001.01111111

green = network part, grey = host part

hex0x0aa77100

decimal178745600

reverse dns0.113.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7100

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.113.0/32	10.167.113.0 – 10.167.113.0	10.167.113.0
2	10.167.113.1/32	10.167.113.1 – 10.167.113.1	10.167.113.1
3	10.167.113.2/32	10.167.113.2 – 10.167.113.2	10.167.113.2
4	10.167.113.3/32	10.167.113.3 – 10.167.113.3	10.167.113.3
5	10.167.113.4/32	10.167.113.4 – 10.167.113.4	10.167.113.4
6	10.167.113.5/32	10.167.113.5 – 10.167.113.5	10.167.113.5
7	10.167.113.6/32	10.167.113.6 – 10.167.113.6	10.167.113.6
8	10.167.113.7/32	10.167.113.7 – 10.167.113.7	10.167.113.7
9	10.167.113.8/32	10.167.113.8 – 10.167.113.8	10.167.113.8
10	10.167.113.9/32	10.167.113.9 – 10.167.113.9	10.167.113.9
11	10.167.113.10/32	10.167.113.10 – 10.167.113.10	10.167.113.10
12	10.167.113.11/32	10.167.113.11 – 10.167.113.11	10.167.113.11
13	10.167.113.12/32	10.167.113.12 – 10.167.113.12	10.167.113.12
14	10.167.113.13/32	10.167.113.13 – 10.167.113.13	10.167.113.13
15	10.167.113.14/32	10.167.113.14 – 10.167.113.14	10.167.113.14
16	10.167.113.15/32	10.167.113.15 – 10.167.113.15	10.167.113.15
17	10.167.113.16/32	10.167.113.16 – 10.167.113.16	10.167.113.16
18	10.167.113.17/32	10.167.113.17 – 10.167.113.17	10.167.113.17
19	10.167.113.18/32	10.167.113.18 – 10.167.113.18	10.167.113.18
20	10.167.113.19/32	10.167.113.19 – 10.167.113.19	10.167.113.19
21	10.167.113.20/32	10.167.113.20 – 10.167.113.20	10.167.113.20
22	10.167.113.21/32	10.167.113.21 – 10.167.113.21	10.167.113.21
23	10.167.113.22/32	10.167.113.22 – 10.167.113.22	10.167.113.22
24	10.167.113.23/32	10.167.113.23 – 10.167.113.23	10.167.113.23
25	10.167.113.24/32	10.167.113.24 – 10.167.113.24	10.167.113.24
26	10.167.113.25/32	10.167.113.25 – 10.167.113.25	10.167.113.25
27	10.167.113.26/32	10.167.113.26 – 10.167.113.26	10.167.113.26
28	10.167.113.27/32	10.167.113.27 – 10.167.113.27	10.167.113.27
29	10.167.113.28/32	10.167.113.28 – 10.167.113.28	10.167.113.28
30	10.167.113.29/32	10.167.113.29 – 10.167.113.29	10.167.113.29
31	10.167.113.30/32	10.167.113.30 – 10.167.113.30	10.167.113.30
32	10.167.113.31/32	10.167.113.31 – 10.167.113.31	10.167.113.31
33	10.167.113.32/32	10.167.113.32 – 10.167.113.32	10.167.113.32
34	10.167.113.33/32	10.167.113.33 – 10.167.113.33	10.167.113.33
35	10.167.113.34/32	10.167.113.34 – 10.167.113.34	10.167.113.34
36	10.167.113.35/32	10.167.113.35 – 10.167.113.35	10.167.113.35
37	10.167.113.36/32	10.167.113.36 – 10.167.113.36	10.167.113.36
38	10.167.113.37/32	10.167.113.37 – 10.167.113.37	10.167.113.37
39	10.167.113.38/32	10.167.113.38 – 10.167.113.38	10.167.113.38
40	10.167.113.39/32	10.167.113.39 – 10.167.113.39	10.167.113.39
41	10.167.113.40/32	10.167.113.40 – 10.167.113.40	10.167.113.40
42	10.167.113.41/32	10.167.113.41 – 10.167.113.41	10.167.113.41
43	10.167.113.42/32	10.167.113.42 – 10.167.113.42	10.167.113.42
44	10.167.113.43/32	10.167.113.43 – 10.167.113.43	10.167.113.43
45	10.167.113.44/32	10.167.113.44 – 10.167.113.44	10.167.113.44
46	10.167.113.45/32	10.167.113.45 – 10.167.113.45	10.167.113.45
47	10.167.113.46/32	10.167.113.46 – 10.167.113.46	10.167.113.46
48	10.167.113.47/32	10.167.113.47 – 10.167.113.47	10.167.113.47
49	10.167.113.48/32	10.167.113.48 – 10.167.113.48	10.167.113.48
50	10.167.113.49/32	10.167.113.49 – 10.167.113.49	10.167.113.49
51	10.167.113.50/32	10.167.113.50 – 10.167.113.50	10.167.113.50
52	10.167.113.51/32	10.167.113.51 – 10.167.113.51	10.167.113.51
53	10.167.113.52/32	10.167.113.52 – 10.167.113.52	10.167.113.52
54	10.167.113.53/32	10.167.113.53 – 10.167.113.53	10.167.113.53
55	10.167.113.54/32	10.167.113.54 – 10.167.113.54	10.167.113.54
56	10.167.113.55/32	10.167.113.55 – 10.167.113.55	10.167.113.55
57	10.167.113.56/32	10.167.113.56 – 10.167.113.56	10.167.113.56
58	10.167.113.57/32	10.167.113.57 – 10.167.113.57	10.167.113.57
59	10.167.113.58/32	10.167.113.58 – 10.167.113.58	10.167.113.58
60	10.167.113.59/32	10.167.113.59 – 10.167.113.59	10.167.113.59
61	10.167.113.60/32	10.167.113.60 – 10.167.113.60	10.167.113.60
62	10.167.113.61/32	10.167.113.61 – 10.167.113.61	10.167.113.61
63	10.167.113.62/32	10.167.113.62 – 10.167.113.62	10.167.113.62
64	10.167.113.63/32	10.167.113.63 – 10.167.113.63	10.167.113.63
65	10.167.113.64/32	10.167.113.64 – 10.167.113.64	10.167.113.64
66	10.167.113.65/32	10.167.113.65 – 10.167.113.65	10.167.113.65
67	10.167.113.66/32	10.167.113.66 – 10.167.113.66	10.167.113.66
68	10.167.113.67/32	10.167.113.67 – 10.167.113.67	10.167.113.67
69	10.167.113.68/32	10.167.113.68 – 10.167.113.68	10.167.113.68
70	10.167.113.69/32	10.167.113.69 – 10.167.113.69	10.167.113.69
71	10.167.113.70/32	10.167.113.70 – 10.167.113.70	10.167.113.70
72	10.167.113.71/32	10.167.113.71 – 10.167.113.71	10.167.113.71
73	10.167.113.72/32	10.167.113.72 – 10.167.113.72	10.167.113.72
74	10.167.113.73/32	10.167.113.73 – 10.167.113.73	10.167.113.73
75	10.167.113.74/32	10.167.113.74 – 10.167.113.74	10.167.113.74
76	10.167.113.75/32	10.167.113.75 – 10.167.113.75	10.167.113.75
77	10.167.113.76/32	10.167.113.76 – 10.167.113.76	10.167.113.76
78	10.167.113.77/32	10.167.113.77 – 10.167.113.77	10.167.113.77
79	10.167.113.78/32	10.167.113.78 – 10.167.113.78	10.167.113.78
80	10.167.113.79/32	10.167.113.79 – 10.167.113.79	10.167.113.79
81	10.167.113.80/32	10.167.113.80 – 10.167.113.80	10.167.113.80
82	10.167.113.81/32	10.167.113.81 – 10.167.113.81	10.167.113.81
83	10.167.113.82/32	10.167.113.82 – 10.167.113.82	10.167.113.82
84	10.167.113.83/32	10.167.113.83 – 10.167.113.83	10.167.113.83
85	10.167.113.84/32	10.167.113.84 – 10.167.113.84	10.167.113.84
86	10.167.113.85/32	10.167.113.85 – 10.167.113.85	10.167.113.85
87	10.167.113.86/32	10.167.113.86 – 10.167.113.86	10.167.113.86
88	10.167.113.87/32	10.167.113.87 – 10.167.113.87	10.167.113.87
89	10.167.113.88/32	10.167.113.88 – 10.167.113.88	10.167.113.88
90	10.167.113.89/32	10.167.113.89 – 10.167.113.89	10.167.113.89
91	10.167.113.90/32	10.167.113.90 – 10.167.113.90	10.167.113.90
92	10.167.113.91/32	10.167.113.91 – 10.167.113.91	10.167.113.91
93	10.167.113.92/32	10.167.113.92 – 10.167.113.92	10.167.113.92
94	10.167.113.93/32	10.167.113.93 – 10.167.113.93	10.167.113.93
95	10.167.113.94/32	10.167.113.94 – 10.167.113.94	10.167.113.94
96	10.167.113.95/32	10.167.113.95 – 10.167.113.95	10.167.113.95
97	10.167.113.96/32	10.167.113.96 – 10.167.113.96	10.167.113.96
98	10.167.113.97/32	10.167.113.97 – 10.167.113.97	10.167.113.97
99	10.167.113.98/32	10.167.113.98 – 10.167.113.98	10.167.113.98
100	10.167.113.99/32	10.167.113.99 – 10.167.113.99	10.167.113.99
101	10.167.113.100/32	10.167.113.100 – 10.167.113.100	10.167.113.100
102	10.167.113.101/32	10.167.113.101 – 10.167.113.101	10.167.113.101
103	10.167.113.102/32	10.167.113.102 – 10.167.113.102	10.167.113.102
104	10.167.113.103/32	10.167.113.103 – 10.167.113.103	10.167.113.103
105	10.167.113.104/32	10.167.113.104 – 10.167.113.104	10.167.113.104
106	10.167.113.105/32	10.167.113.105 – 10.167.113.105	10.167.113.105
107	10.167.113.106/32	10.167.113.106 – 10.167.113.106	10.167.113.106
108	10.167.113.107/32	10.167.113.107 – 10.167.113.107	10.167.113.107
109	10.167.113.108/32	10.167.113.108 – 10.167.113.108	10.167.113.108
110	10.167.113.109/32	10.167.113.109 – 10.167.113.109	10.167.113.109
111	10.167.113.110/32	10.167.113.110 – 10.167.113.110	10.167.113.110
112	10.167.113.111/32	10.167.113.111 – 10.167.113.111	10.167.113.111
113	10.167.113.112/32	10.167.113.112 – 10.167.113.112	10.167.113.112
114	10.167.113.113/32	10.167.113.113 – 10.167.113.113	10.167.113.113
115	10.167.113.114/32	10.167.113.114 – 10.167.113.114	10.167.113.114
116	10.167.113.115/32	10.167.113.115 – 10.167.113.115	10.167.113.115
117	10.167.113.116/32	10.167.113.116 – 10.167.113.116	10.167.113.116
118	10.167.113.117/32	10.167.113.117 – 10.167.113.117	10.167.113.117
119	10.167.113.118/32	10.167.113.118 – 10.167.113.118	10.167.113.118
120	10.167.113.119/32	10.167.113.119 – 10.167.113.119	10.167.113.119
121	10.167.113.120/32	10.167.113.120 – 10.167.113.120	10.167.113.120
122	10.167.113.121/32	10.167.113.121 – 10.167.113.121	10.167.113.121
123	10.167.113.122/32	10.167.113.122 – 10.167.113.122	10.167.113.122
124	10.167.113.123/32	10.167.113.123 – 10.167.113.123	10.167.113.123
125	10.167.113.124/32	10.167.113.124 – 10.167.113.124	10.167.113.124
126	10.167.113.125/32	10.167.113.125 – 10.167.113.125	10.167.113.125
127	10.167.113.126/32	10.167.113.126 – 10.167.113.126	10.167.113.126
128	10.167.113.127/32	10.167.113.127 – 10.167.113.127	10.167.113.127

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 →