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)10.167.24.0/25

network10.167.24.0/25

broadcast10.167.24.127

first host10.167.24.1

last host10.167.24.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.24.0/25

address00001010.10100111.00011000.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.00011000.00000000

broadcast00001010.10100111.00011000.01111111

green = network part, grey = host part

hex0x0aa71800

decimal178722816

reverse dns0.24.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:1800

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.24.0/32	10.167.24.0 – 10.167.24.0	10.167.24.0
2	10.167.24.1/32	10.167.24.1 – 10.167.24.1	10.167.24.1
3	10.167.24.2/32	10.167.24.2 – 10.167.24.2	10.167.24.2
4	10.167.24.3/32	10.167.24.3 – 10.167.24.3	10.167.24.3
5	10.167.24.4/32	10.167.24.4 – 10.167.24.4	10.167.24.4
6	10.167.24.5/32	10.167.24.5 – 10.167.24.5	10.167.24.5
7	10.167.24.6/32	10.167.24.6 – 10.167.24.6	10.167.24.6
8	10.167.24.7/32	10.167.24.7 – 10.167.24.7	10.167.24.7
9	10.167.24.8/32	10.167.24.8 – 10.167.24.8	10.167.24.8
10	10.167.24.9/32	10.167.24.9 – 10.167.24.9	10.167.24.9
11	10.167.24.10/32	10.167.24.10 – 10.167.24.10	10.167.24.10
12	10.167.24.11/32	10.167.24.11 – 10.167.24.11	10.167.24.11
13	10.167.24.12/32	10.167.24.12 – 10.167.24.12	10.167.24.12
14	10.167.24.13/32	10.167.24.13 – 10.167.24.13	10.167.24.13
15	10.167.24.14/32	10.167.24.14 – 10.167.24.14	10.167.24.14
16	10.167.24.15/32	10.167.24.15 – 10.167.24.15	10.167.24.15
17	10.167.24.16/32	10.167.24.16 – 10.167.24.16	10.167.24.16
18	10.167.24.17/32	10.167.24.17 – 10.167.24.17	10.167.24.17
19	10.167.24.18/32	10.167.24.18 – 10.167.24.18	10.167.24.18
20	10.167.24.19/32	10.167.24.19 – 10.167.24.19	10.167.24.19
21	10.167.24.20/32	10.167.24.20 – 10.167.24.20	10.167.24.20
22	10.167.24.21/32	10.167.24.21 – 10.167.24.21	10.167.24.21
23	10.167.24.22/32	10.167.24.22 – 10.167.24.22	10.167.24.22
24	10.167.24.23/32	10.167.24.23 – 10.167.24.23	10.167.24.23
25	10.167.24.24/32	10.167.24.24 – 10.167.24.24	10.167.24.24
26	10.167.24.25/32	10.167.24.25 – 10.167.24.25	10.167.24.25
27	10.167.24.26/32	10.167.24.26 – 10.167.24.26	10.167.24.26
28	10.167.24.27/32	10.167.24.27 – 10.167.24.27	10.167.24.27
29	10.167.24.28/32	10.167.24.28 – 10.167.24.28	10.167.24.28
30	10.167.24.29/32	10.167.24.29 – 10.167.24.29	10.167.24.29
31	10.167.24.30/32	10.167.24.30 – 10.167.24.30	10.167.24.30
32	10.167.24.31/32	10.167.24.31 – 10.167.24.31	10.167.24.31
33	10.167.24.32/32	10.167.24.32 – 10.167.24.32	10.167.24.32
34	10.167.24.33/32	10.167.24.33 – 10.167.24.33	10.167.24.33
35	10.167.24.34/32	10.167.24.34 – 10.167.24.34	10.167.24.34
36	10.167.24.35/32	10.167.24.35 – 10.167.24.35	10.167.24.35
37	10.167.24.36/32	10.167.24.36 – 10.167.24.36	10.167.24.36
38	10.167.24.37/32	10.167.24.37 – 10.167.24.37	10.167.24.37
39	10.167.24.38/32	10.167.24.38 – 10.167.24.38	10.167.24.38
40	10.167.24.39/32	10.167.24.39 – 10.167.24.39	10.167.24.39
41	10.167.24.40/32	10.167.24.40 – 10.167.24.40	10.167.24.40
42	10.167.24.41/32	10.167.24.41 – 10.167.24.41	10.167.24.41
43	10.167.24.42/32	10.167.24.42 – 10.167.24.42	10.167.24.42
44	10.167.24.43/32	10.167.24.43 – 10.167.24.43	10.167.24.43
45	10.167.24.44/32	10.167.24.44 – 10.167.24.44	10.167.24.44
46	10.167.24.45/32	10.167.24.45 – 10.167.24.45	10.167.24.45
47	10.167.24.46/32	10.167.24.46 – 10.167.24.46	10.167.24.46
48	10.167.24.47/32	10.167.24.47 – 10.167.24.47	10.167.24.47
49	10.167.24.48/32	10.167.24.48 – 10.167.24.48	10.167.24.48
50	10.167.24.49/32	10.167.24.49 – 10.167.24.49	10.167.24.49
51	10.167.24.50/32	10.167.24.50 – 10.167.24.50	10.167.24.50
52	10.167.24.51/32	10.167.24.51 – 10.167.24.51	10.167.24.51
53	10.167.24.52/32	10.167.24.52 – 10.167.24.52	10.167.24.52
54	10.167.24.53/32	10.167.24.53 – 10.167.24.53	10.167.24.53
55	10.167.24.54/32	10.167.24.54 – 10.167.24.54	10.167.24.54
56	10.167.24.55/32	10.167.24.55 – 10.167.24.55	10.167.24.55
57	10.167.24.56/32	10.167.24.56 – 10.167.24.56	10.167.24.56
58	10.167.24.57/32	10.167.24.57 – 10.167.24.57	10.167.24.57
59	10.167.24.58/32	10.167.24.58 – 10.167.24.58	10.167.24.58
60	10.167.24.59/32	10.167.24.59 – 10.167.24.59	10.167.24.59
61	10.167.24.60/32	10.167.24.60 – 10.167.24.60	10.167.24.60
62	10.167.24.61/32	10.167.24.61 – 10.167.24.61	10.167.24.61
63	10.167.24.62/32	10.167.24.62 – 10.167.24.62	10.167.24.62
64	10.167.24.63/32	10.167.24.63 – 10.167.24.63	10.167.24.63
65	10.167.24.64/32	10.167.24.64 – 10.167.24.64	10.167.24.64
66	10.167.24.65/32	10.167.24.65 – 10.167.24.65	10.167.24.65
67	10.167.24.66/32	10.167.24.66 – 10.167.24.66	10.167.24.66
68	10.167.24.67/32	10.167.24.67 – 10.167.24.67	10.167.24.67
69	10.167.24.68/32	10.167.24.68 – 10.167.24.68	10.167.24.68
70	10.167.24.69/32	10.167.24.69 – 10.167.24.69	10.167.24.69
71	10.167.24.70/32	10.167.24.70 – 10.167.24.70	10.167.24.70
72	10.167.24.71/32	10.167.24.71 – 10.167.24.71	10.167.24.71
73	10.167.24.72/32	10.167.24.72 – 10.167.24.72	10.167.24.72
74	10.167.24.73/32	10.167.24.73 – 10.167.24.73	10.167.24.73
75	10.167.24.74/32	10.167.24.74 – 10.167.24.74	10.167.24.74
76	10.167.24.75/32	10.167.24.75 – 10.167.24.75	10.167.24.75
77	10.167.24.76/32	10.167.24.76 – 10.167.24.76	10.167.24.76
78	10.167.24.77/32	10.167.24.77 – 10.167.24.77	10.167.24.77
79	10.167.24.78/32	10.167.24.78 – 10.167.24.78	10.167.24.78
80	10.167.24.79/32	10.167.24.79 – 10.167.24.79	10.167.24.79
81	10.167.24.80/32	10.167.24.80 – 10.167.24.80	10.167.24.80
82	10.167.24.81/32	10.167.24.81 – 10.167.24.81	10.167.24.81
83	10.167.24.82/32	10.167.24.82 – 10.167.24.82	10.167.24.82
84	10.167.24.83/32	10.167.24.83 – 10.167.24.83	10.167.24.83
85	10.167.24.84/32	10.167.24.84 – 10.167.24.84	10.167.24.84
86	10.167.24.85/32	10.167.24.85 – 10.167.24.85	10.167.24.85
87	10.167.24.86/32	10.167.24.86 – 10.167.24.86	10.167.24.86
88	10.167.24.87/32	10.167.24.87 – 10.167.24.87	10.167.24.87
89	10.167.24.88/32	10.167.24.88 – 10.167.24.88	10.167.24.88
90	10.167.24.89/32	10.167.24.89 – 10.167.24.89	10.167.24.89
91	10.167.24.90/32	10.167.24.90 – 10.167.24.90	10.167.24.90
92	10.167.24.91/32	10.167.24.91 – 10.167.24.91	10.167.24.91
93	10.167.24.92/32	10.167.24.92 – 10.167.24.92	10.167.24.92
94	10.167.24.93/32	10.167.24.93 – 10.167.24.93	10.167.24.93
95	10.167.24.94/32	10.167.24.94 – 10.167.24.94	10.167.24.94
96	10.167.24.95/32	10.167.24.95 – 10.167.24.95	10.167.24.95
97	10.167.24.96/32	10.167.24.96 – 10.167.24.96	10.167.24.96
98	10.167.24.97/32	10.167.24.97 – 10.167.24.97	10.167.24.97
99	10.167.24.98/32	10.167.24.98 – 10.167.24.98	10.167.24.98
100	10.167.24.99/32	10.167.24.99 – 10.167.24.99	10.167.24.99
101	10.167.24.100/32	10.167.24.100 – 10.167.24.100	10.167.24.100
102	10.167.24.101/32	10.167.24.101 – 10.167.24.101	10.167.24.101
103	10.167.24.102/32	10.167.24.102 – 10.167.24.102	10.167.24.102
104	10.167.24.103/32	10.167.24.103 – 10.167.24.103	10.167.24.103
105	10.167.24.104/32	10.167.24.104 – 10.167.24.104	10.167.24.104
106	10.167.24.105/32	10.167.24.105 – 10.167.24.105	10.167.24.105
107	10.167.24.106/32	10.167.24.106 – 10.167.24.106	10.167.24.106
108	10.167.24.107/32	10.167.24.107 – 10.167.24.107	10.167.24.107
109	10.167.24.108/32	10.167.24.108 – 10.167.24.108	10.167.24.108
110	10.167.24.109/32	10.167.24.109 – 10.167.24.109	10.167.24.109
111	10.167.24.110/32	10.167.24.110 – 10.167.24.110	10.167.24.110
112	10.167.24.111/32	10.167.24.111 – 10.167.24.111	10.167.24.111
113	10.167.24.112/32	10.167.24.112 – 10.167.24.112	10.167.24.112
114	10.167.24.113/32	10.167.24.113 – 10.167.24.113	10.167.24.113
115	10.167.24.114/32	10.167.24.114 – 10.167.24.114	10.167.24.114
116	10.167.24.115/32	10.167.24.115 – 10.167.24.115	10.167.24.115
117	10.167.24.116/32	10.167.24.116 – 10.167.24.116	10.167.24.116
118	10.167.24.117/32	10.167.24.117 – 10.167.24.117	10.167.24.117
119	10.167.24.118/32	10.167.24.118 – 10.167.24.118	10.167.24.118
120	10.167.24.119/32	10.167.24.119 – 10.167.24.119	10.167.24.119
121	10.167.24.120/32	10.167.24.120 – 10.167.24.120	10.167.24.120
122	10.167.24.121/32	10.167.24.121 – 10.167.24.121	10.167.24.121
123	10.167.24.122/32	10.167.24.122 – 10.167.24.122	10.167.24.122
124	10.167.24.123/32	10.167.24.123 – 10.167.24.123	10.167.24.123
125	10.167.24.124/32	10.167.24.124 – 10.167.24.124	10.167.24.124
126	10.167.24.125/32	10.167.24.125 – 10.167.24.125	10.167.24.125
127	10.167.24.126/32	10.167.24.126 – 10.167.24.126	10.167.24.126
128	10.167.24.127/32	10.167.24.127 – 10.167.24.127	10.167.24.127

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 →