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)10.167.117.0/25

network10.167.117.0/25

broadcast10.167.117.127

first host10.167.117.1

last host10.167.117.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.117.0/25

address00001010.10100111.01110101.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01110101.00000000

broadcast00001010.10100111.01110101.01111111

green = network part, grey = host part

hex0x0aa77500

decimal178746624

reverse dns0.117.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:7500

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.117.0/32	10.167.117.0 – 10.167.117.0	10.167.117.0
2	10.167.117.1/32	10.167.117.1 – 10.167.117.1	10.167.117.1
3	10.167.117.2/32	10.167.117.2 – 10.167.117.2	10.167.117.2
4	10.167.117.3/32	10.167.117.3 – 10.167.117.3	10.167.117.3
5	10.167.117.4/32	10.167.117.4 – 10.167.117.4	10.167.117.4
6	10.167.117.5/32	10.167.117.5 – 10.167.117.5	10.167.117.5
7	10.167.117.6/32	10.167.117.6 – 10.167.117.6	10.167.117.6
8	10.167.117.7/32	10.167.117.7 – 10.167.117.7	10.167.117.7
9	10.167.117.8/32	10.167.117.8 – 10.167.117.8	10.167.117.8
10	10.167.117.9/32	10.167.117.9 – 10.167.117.9	10.167.117.9
11	10.167.117.10/32	10.167.117.10 – 10.167.117.10	10.167.117.10
12	10.167.117.11/32	10.167.117.11 – 10.167.117.11	10.167.117.11
13	10.167.117.12/32	10.167.117.12 – 10.167.117.12	10.167.117.12
14	10.167.117.13/32	10.167.117.13 – 10.167.117.13	10.167.117.13
15	10.167.117.14/32	10.167.117.14 – 10.167.117.14	10.167.117.14
16	10.167.117.15/32	10.167.117.15 – 10.167.117.15	10.167.117.15
17	10.167.117.16/32	10.167.117.16 – 10.167.117.16	10.167.117.16
18	10.167.117.17/32	10.167.117.17 – 10.167.117.17	10.167.117.17
19	10.167.117.18/32	10.167.117.18 – 10.167.117.18	10.167.117.18
20	10.167.117.19/32	10.167.117.19 – 10.167.117.19	10.167.117.19
21	10.167.117.20/32	10.167.117.20 – 10.167.117.20	10.167.117.20
22	10.167.117.21/32	10.167.117.21 – 10.167.117.21	10.167.117.21
23	10.167.117.22/32	10.167.117.22 – 10.167.117.22	10.167.117.22
24	10.167.117.23/32	10.167.117.23 – 10.167.117.23	10.167.117.23
25	10.167.117.24/32	10.167.117.24 – 10.167.117.24	10.167.117.24
26	10.167.117.25/32	10.167.117.25 – 10.167.117.25	10.167.117.25
27	10.167.117.26/32	10.167.117.26 – 10.167.117.26	10.167.117.26
28	10.167.117.27/32	10.167.117.27 – 10.167.117.27	10.167.117.27
29	10.167.117.28/32	10.167.117.28 – 10.167.117.28	10.167.117.28
30	10.167.117.29/32	10.167.117.29 – 10.167.117.29	10.167.117.29
31	10.167.117.30/32	10.167.117.30 – 10.167.117.30	10.167.117.30
32	10.167.117.31/32	10.167.117.31 – 10.167.117.31	10.167.117.31
33	10.167.117.32/32	10.167.117.32 – 10.167.117.32	10.167.117.32
34	10.167.117.33/32	10.167.117.33 – 10.167.117.33	10.167.117.33
35	10.167.117.34/32	10.167.117.34 – 10.167.117.34	10.167.117.34
36	10.167.117.35/32	10.167.117.35 – 10.167.117.35	10.167.117.35
37	10.167.117.36/32	10.167.117.36 – 10.167.117.36	10.167.117.36
38	10.167.117.37/32	10.167.117.37 – 10.167.117.37	10.167.117.37
39	10.167.117.38/32	10.167.117.38 – 10.167.117.38	10.167.117.38
40	10.167.117.39/32	10.167.117.39 – 10.167.117.39	10.167.117.39
41	10.167.117.40/32	10.167.117.40 – 10.167.117.40	10.167.117.40
42	10.167.117.41/32	10.167.117.41 – 10.167.117.41	10.167.117.41
43	10.167.117.42/32	10.167.117.42 – 10.167.117.42	10.167.117.42
44	10.167.117.43/32	10.167.117.43 – 10.167.117.43	10.167.117.43
45	10.167.117.44/32	10.167.117.44 – 10.167.117.44	10.167.117.44
46	10.167.117.45/32	10.167.117.45 – 10.167.117.45	10.167.117.45
47	10.167.117.46/32	10.167.117.46 – 10.167.117.46	10.167.117.46
48	10.167.117.47/32	10.167.117.47 – 10.167.117.47	10.167.117.47
49	10.167.117.48/32	10.167.117.48 – 10.167.117.48	10.167.117.48
50	10.167.117.49/32	10.167.117.49 – 10.167.117.49	10.167.117.49
51	10.167.117.50/32	10.167.117.50 – 10.167.117.50	10.167.117.50
52	10.167.117.51/32	10.167.117.51 – 10.167.117.51	10.167.117.51
53	10.167.117.52/32	10.167.117.52 – 10.167.117.52	10.167.117.52
54	10.167.117.53/32	10.167.117.53 – 10.167.117.53	10.167.117.53
55	10.167.117.54/32	10.167.117.54 – 10.167.117.54	10.167.117.54
56	10.167.117.55/32	10.167.117.55 – 10.167.117.55	10.167.117.55
57	10.167.117.56/32	10.167.117.56 – 10.167.117.56	10.167.117.56
58	10.167.117.57/32	10.167.117.57 – 10.167.117.57	10.167.117.57
59	10.167.117.58/32	10.167.117.58 – 10.167.117.58	10.167.117.58
60	10.167.117.59/32	10.167.117.59 – 10.167.117.59	10.167.117.59
61	10.167.117.60/32	10.167.117.60 – 10.167.117.60	10.167.117.60
62	10.167.117.61/32	10.167.117.61 – 10.167.117.61	10.167.117.61
63	10.167.117.62/32	10.167.117.62 – 10.167.117.62	10.167.117.62
64	10.167.117.63/32	10.167.117.63 – 10.167.117.63	10.167.117.63
65	10.167.117.64/32	10.167.117.64 – 10.167.117.64	10.167.117.64
66	10.167.117.65/32	10.167.117.65 – 10.167.117.65	10.167.117.65
67	10.167.117.66/32	10.167.117.66 – 10.167.117.66	10.167.117.66
68	10.167.117.67/32	10.167.117.67 – 10.167.117.67	10.167.117.67
69	10.167.117.68/32	10.167.117.68 – 10.167.117.68	10.167.117.68
70	10.167.117.69/32	10.167.117.69 – 10.167.117.69	10.167.117.69
71	10.167.117.70/32	10.167.117.70 – 10.167.117.70	10.167.117.70
72	10.167.117.71/32	10.167.117.71 – 10.167.117.71	10.167.117.71
73	10.167.117.72/32	10.167.117.72 – 10.167.117.72	10.167.117.72
74	10.167.117.73/32	10.167.117.73 – 10.167.117.73	10.167.117.73
75	10.167.117.74/32	10.167.117.74 – 10.167.117.74	10.167.117.74
76	10.167.117.75/32	10.167.117.75 – 10.167.117.75	10.167.117.75
77	10.167.117.76/32	10.167.117.76 – 10.167.117.76	10.167.117.76
78	10.167.117.77/32	10.167.117.77 – 10.167.117.77	10.167.117.77
79	10.167.117.78/32	10.167.117.78 – 10.167.117.78	10.167.117.78
80	10.167.117.79/32	10.167.117.79 – 10.167.117.79	10.167.117.79
81	10.167.117.80/32	10.167.117.80 – 10.167.117.80	10.167.117.80
82	10.167.117.81/32	10.167.117.81 – 10.167.117.81	10.167.117.81
83	10.167.117.82/32	10.167.117.82 – 10.167.117.82	10.167.117.82
84	10.167.117.83/32	10.167.117.83 – 10.167.117.83	10.167.117.83
85	10.167.117.84/32	10.167.117.84 – 10.167.117.84	10.167.117.84
86	10.167.117.85/32	10.167.117.85 – 10.167.117.85	10.167.117.85
87	10.167.117.86/32	10.167.117.86 – 10.167.117.86	10.167.117.86
88	10.167.117.87/32	10.167.117.87 – 10.167.117.87	10.167.117.87
89	10.167.117.88/32	10.167.117.88 – 10.167.117.88	10.167.117.88
90	10.167.117.89/32	10.167.117.89 – 10.167.117.89	10.167.117.89
91	10.167.117.90/32	10.167.117.90 – 10.167.117.90	10.167.117.90
92	10.167.117.91/32	10.167.117.91 – 10.167.117.91	10.167.117.91
93	10.167.117.92/32	10.167.117.92 – 10.167.117.92	10.167.117.92
94	10.167.117.93/32	10.167.117.93 – 10.167.117.93	10.167.117.93
95	10.167.117.94/32	10.167.117.94 – 10.167.117.94	10.167.117.94
96	10.167.117.95/32	10.167.117.95 – 10.167.117.95	10.167.117.95
97	10.167.117.96/32	10.167.117.96 – 10.167.117.96	10.167.117.96
98	10.167.117.97/32	10.167.117.97 – 10.167.117.97	10.167.117.97
99	10.167.117.98/32	10.167.117.98 – 10.167.117.98	10.167.117.98
100	10.167.117.99/32	10.167.117.99 – 10.167.117.99	10.167.117.99
101	10.167.117.100/32	10.167.117.100 – 10.167.117.100	10.167.117.100
102	10.167.117.101/32	10.167.117.101 – 10.167.117.101	10.167.117.101
103	10.167.117.102/32	10.167.117.102 – 10.167.117.102	10.167.117.102
104	10.167.117.103/32	10.167.117.103 – 10.167.117.103	10.167.117.103
105	10.167.117.104/32	10.167.117.104 – 10.167.117.104	10.167.117.104
106	10.167.117.105/32	10.167.117.105 – 10.167.117.105	10.167.117.105
107	10.167.117.106/32	10.167.117.106 – 10.167.117.106	10.167.117.106
108	10.167.117.107/32	10.167.117.107 – 10.167.117.107	10.167.117.107
109	10.167.117.108/32	10.167.117.108 – 10.167.117.108	10.167.117.108
110	10.167.117.109/32	10.167.117.109 – 10.167.117.109	10.167.117.109
111	10.167.117.110/32	10.167.117.110 – 10.167.117.110	10.167.117.110
112	10.167.117.111/32	10.167.117.111 – 10.167.117.111	10.167.117.111
113	10.167.117.112/32	10.167.117.112 – 10.167.117.112	10.167.117.112
114	10.167.117.113/32	10.167.117.113 – 10.167.117.113	10.167.117.113
115	10.167.117.114/32	10.167.117.114 – 10.167.117.114	10.167.117.114
116	10.167.117.115/32	10.167.117.115 – 10.167.117.115	10.167.117.115
117	10.167.117.116/32	10.167.117.116 – 10.167.117.116	10.167.117.116
118	10.167.117.117/32	10.167.117.117 – 10.167.117.117	10.167.117.117
119	10.167.117.118/32	10.167.117.118 – 10.167.117.118	10.167.117.118
120	10.167.117.119/32	10.167.117.119 – 10.167.117.119	10.167.117.119
121	10.167.117.120/32	10.167.117.120 – 10.167.117.120	10.167.117.120
122	10.167.117.121/32	10.167.117.121 – 10.167.117.121	10.167.117.121
123	10.167.117.122/32	10.167.117.122 – 10.167.117.122	10.167.117.122
124	10.167.117.123/32	10.167.117.123 – 10.167.117.123	10.167.117.123
125	10.167.117.124/32	10.167.117.124 – 10.167.117.124	10.167.117.124
126	10.167.117.125/32	10.167.117.125 – 10.167.117.125	10.167.117.125
127	10.167.117.126/32	10.167.117.126 – 10.167.117.126	10.167.117.126
128	10.167.117.127/32	10.167.117.127 – 10.167.117.127	10.167.117.127

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 →