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)10.167.92.0/25

network10.167.92.0/25

broadcast10.167.92.127

first host10.167.92.1

last host10.167.92.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.92.0/25

address00001010.10100111.01011100.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01011100.00000000

broadcast00001010.10100111.01011100.01111111

green = network part, grey = host part

hex0x0aa75c00

decimal178740224

reverse dns0.92.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:5c00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.92.0/32	10.167.92.0 – 10.167.92.0	10.167.92.0
2	10.167.92.1/32	10.167.92.1 – 10.167.92.1	10.167.92.1
3	10.167.92.2/32	10.167.92.2 – 10.167.92.2	10.167.92.2
4	10.167.92.3/32	10.167.92.3 – 10.167.92.3	10.167.92.3
5	10.167.92.4/32	10.167.92.4 – 10.167.92.4	10.167.92.4
6	10.167.92.5/32	10.167.92.5 – 10.167.92.5	10.167.92.5
7	10.167.92.6/32	10.167.92.6 – 10.167.92.6	10.167.92.6
8	10.167.92.7/32	10.167.92.7 – 10.167.92.7	10.167.92.7
9	10.167.92.8/32	10.167.92.8 – 10.167.92.8	10.167.92.8
10	10.167.92.9/32	10.167.92.9 – 10.167.92.9	10.167.92.9
11	10.167.92.10/32	10.167.92.10 – 10.167.92.10	10.167.92.10
12	10.167.92.11/32	10.167.92.11 – 10.167.92.11	10.167.92.11
13	10.167.92.12/32	10.167.92.12 – 10.167.92.12	10.167.92.12
14	10.167.92.13/32	10.167.92.13 – 10.167.92.13	10.167.92.13
15	10.167.92.14/32	10.167.92.14 – 10.167.92.14	10.167.92.14
16	10.167.92.15/32	10.167.92.15 – 10.167.92.15	10.167.92.15
17	10.167.92.16/32	10.167.92.16 – 10.167.92.16	10.167.92.16
18	10.167.92.17/32	10.167.92.17 – 10.167.92.17	10.167.92.17
19	10.167.92.18/32	10.167.92.18 – 10.167.92.18	10.167.92.18
20	10.167.92.19/32	10.167.92.19 – 10.167.92.19	10.167.92.19
21	10.167.92.20/32	10.167.92.20 – 10.167.92.20	10.167.92.20
22	10.167.92.21/32	10.167.92.21 – 10.167.92.21	10.167.92.21
23	10.167.92.22/32	10.167.92.22 – 10.167.92.22	10.167.92.22
24	10.167.92.23/32	10.167.92.23 – 10.167.92.23	10.167.92.23
25	10.167.92.24/32	10.167.92.24 – 10.167.92.24	10.167.92.24
26	10.167.92.25/32	10.167.92.25 – 10.167.92.25	10.167.92.25
27	10.167.92.26/32	10.167.92.26 – 10.167.92.26	10.167.92.26
28	10.167.92.27/32	10.167.92.27 – 10.167.92.27	10.167.92.27
29	10.167.92.28/32	10.167.92.28 – 10.167.92.28	10.167.92.28
30	10.167.92.29/32	10.167.92.29 – 10.167.92.29	10.167.92.29
31	10.167.92.30/32	10.167.92.30 – 10.167.92.30	10.167.92.30
32	10.167.92.31/32	10.167.92.31 – 10.167.92.31	10.167.92.31
33	10.167.92.32/32	10.167.92.32 – 10.167.92.32	10.167.92.32
34	10.167.92.33/32	10.167.92.33 – 10.167.92.33	10.167.92.33
35	10.167.92.34/32	10.167.92.34 – 10.167.92.34	10.167.92.34
36	10.167.92.35/32	10.167.92.35 – 10.167.92.35	10.167.92.35
37	10.167.92.36/32	10.167.92.36 – 10.167.92.36	10.167.92.36
38	10.167.92.37/32	10.167.92.37 – 10.167.92.37	10.167.92.37
39	10.167.92.38/32	10.167.92.38 – 10.167.92.38	10.167.92.38
40	10.167.92.39/32	10.167.92.39 – 10.167.92.39	10.167.92.39
41	10.167.92.40/32	10.167.92.40 – 10.167.92.40	10.167.92.40
42	10.167.92.41/32	10.167.92.41 – 10.167.92.41	10.167.92.41
43	10.167.92.42/32	10.167.92.42 – 10.167.92.42	10.167.92.42
44	10.167.92.43/32	10.167.92.43 – 10.167.92.43	10.167.92.43
45	10.167.92.44/32	10.167.92.44 – 10.167.92.44	10.167.92.44
46	10.167.92.45/32	10.167.92.45 – 10.167.92.45	10.167.92.45
47	10.167.92.46/32	10.167.92.46 – 10.167.92.46	10.167.92.46
48	10.167.92.47/32	10.167.92.47 – 10.167.92.47	10.167.92.47
49	10.167.92.48/32	10.167.92.48 – 10.167.92.48	10.167.92.48
50	10.167.92.49/32	10.167.92.49 – 10.167.92.49	10.167.92.49
51	10.167.92.50/32	10.167.92.50 – 10.167.92.50	10.167.92.50
52	10.167.92.51/32	10.167.92.51 – 10.167.92.51	10.167.92.51
53	10.167.92.52/32	10.167.92.52 – 10.167.92.52	10.167.92.52
54	10.167.92.53/32	10.167.92.53 – 10.167.92.53	10.167.92.53
55	10.167.92.54/32	10.167.92.54 – 10.167.92.54	10.167.92.54
56	10.167.92.55/32	10.167.92.55 – 10.167.92.55	10.167.92.55
57	10.167.92.56/32	10.167.92.56 – 10.167.92.56	10.167.92.56
58	10.167.92.57/32	10.167.92.57 – 10.167.92.57	10.167.92.57
59	10.167.92.58/32	10.167.92.58 – 10.167.92.58	10.167.92.58
60	10.167.92.59/32	10.167.92.59 – 10.167.92.59	10.167.92.59
61	10.167.92.60/32	10.167.92.60 – 10.167.92.60	10.167.92.60
62	10.167.92.61/32	10.167.92.61 – 10.167.92.61	10.167.92.61
63	10.167.92.62/32	10.167.92.62 – 10.167.92.62	10.167.92.62
64	10.167.92.63/32	10.167.92.63 – 10.167.92.63	10.167.92.63
65	10.167.92.64/32	10.167.92.64 – 10.167.92.64	10.167.92.64
66	10.167.92.65/32	10.167.92.65 – 10.167.92.65	10.167.92.65
67	10.167.92.66/32	10.167.92.66 – 10.167.92.66	10.167.92.66
68	10.167.92.67/32	10.167.92.67 – 10.167.92.67	10.167.92.67
69	10.167.92.68/32	10.167.92.68 – 10.167.92.68	10.167.92.68
70	10.167.92.69/32	10.167.92.69 – 10.167.92.69	10.167.92.69
71	10.167.92.70/32	10.167.92.70 – 10.167.92.70	10.167.92.70
72	10.167.92.71/32	10.167.92.71 – 10.167.92.71	10.167.92.71
73	10.167.92.72/32	10.167.92.72 – 10.167.92.72	10.167.92.72
74	10.167.92.73/32	10.167.92.73 – 10.167.92.73	10.167.92.73
75	10.167.92.74/32	10.167.92.74 – 10.167.92.74	10.167.92.74
76	10.167.92.75/32	10.167.92.75 – 10.167.92.75	10.167.92.75
77	10.167.92.76/32	10.167.92.76 – 10.167.92.76	10.167.92.76
78	10.167.92.77/32	10.167.92.77 – 10.167.92.77	10.167.92.77
79	10.167.92.78/32	10.167.92.78 – 10.167.92.78	10.167.92.78
80	10.167.92.79/32	10.167.92.79 – 10.167.92.79	10.167.92.79
81	10.167.92.80/32	10.167.92.80 – 10.167.92.80	10.167.92.80
82	10.167.92.81/32	10.167.92.81 – 10.167.92.81	10.167.92.81
83	10.167.92.82/32	10.167.92.82 – 10.167.92.82	10.167.92.82
84	10.167.92.83/32	10.167.92.83 – 10.167.92.83	10.167.92.83
85	10.167.92.84/32	10.167.92.84 – 10.167.92.84	10.167.92.84
86	10.167.92.85/32	10.167.92.85 – 10.167.92.85	10.167.92.85
87	10.167.92.86/32	10.167.92.86 – 10.167.92.86	10.167.92.86
88	10.167.92.87/32	10.167.92.87 – 10.167.92.87	10.167.92.87
89	10.167.92.88/32	10.167.92.88 – 10.167.92.88	10.167.92.88
90	10.167.92.89/32	10.167.92.89 – 10.167.92.89	10.167.92.89
91	10.167.92.90/32	10.167.92.90 – 10.167.92.90	10.167.92.90
92	10.167.92.91/32	10.167.92.91 – 10.167.92.91	10.167.92.91
93	10.167.92.92/32	10.167.92.92 – 10.167.92.92	10.167.92.92
94	10.167.92.93/32	10.167.92.93 – 10.167.92.93	10.167.92.93
95	10.167.92.94/32	10.167.92.94 – 10.167.92.94	10.167.92.94
96	10.167.92.95/32	10.167.92.95 – 10.167.92.95	10.167.92.95
97	10.167.92.96/32	10.167.92.96 – 10.167.92.96	10.167.92.96
98	10.167.92.97/32	10.167.92.97 – 10.167.92.97	10.167.92.97
99	10.167.92.98/32	10.167.92.98 – 10.167.92.98	10.167.92.98
100	10.167.92.99/32	10.167.92.99 – 10.167.92.99	10.167.92.99
101	10.167.92.100/32	10.167.92.100 – 10.167.92.100	10.167.92.100
102	10.167.92.101/32	10.167.92.101 – 10.167.92.101	10.167.92.101
103	10.167.92.102/32	10.167.92.102 – 10.167.92.102	10.167.92.102
104	10.167.92.103/32	10.167.92.103 – 10.167.92.103	10.167.92.103
105	10.167.92.104/32	10.167.92.104 – 10.167.92.104	10.167.92.104
106	10.167.92.105/32	10.167.92.105 – 10.167.92.105	10.167.92.105
107	10.167.92.106/32	10.167.92.106 – 10.167.92.106	10.167.92.106
108	10.167.92.107/32	10.167.92.107 – 10.167.92.107	10.167.92.107
109	10.167.92.108/32	10.167.92.108 – 10.167.92.108	10.167.92.108
110	10.167.92.109/32	10.167.92.109 – 10.167.92.109	10.167.92.109
111	10.167.92.110/32	10.167.92.110 – 10.167.92.110	10.167.92.110
112	10.167.92.111/32	10.167.92.111 – 10.167.92.111	10.167.92.111
113	10.167.92.112/32	10.167.92.112 – 10.167.92.112	10.167.92.112
114	10.167.92.113/32	10.167.92.113 – 10.167.92.113	10.167.92.113
115	10.167.92.114/32	10.167.92.114 – 10.167.92.114	10.167.92.114
116	10.167.92.115/32	10.167.92.115 – 10.167.92.115	10.167.92.115
117	10.167.92.116/32	10.167.92.116 – 10.167.92.116	10.167.92.116
118	10.167.92.117/32	10.167.92.117 – 10.167.92.117	10.167.92.117
119	10.167.92.118/32	10.167.92.118 – 10.167.92.118	10.167.92.118
120	10.167.92.119/32	10.167.92.119 – 10.167.92.119	10.167.92.119
121	10.167.92.120/32	10.167.92.120 – 10.167.92.120	10.167.92.120
122	10.167.92.121/32	10.167.92.121 – 10.167.92.121	10.167.92.121
123	10.167.92.122/32	10.167.92.122 – 10.167.92.122	10.167.92.122
124	10.167.92.123/32	10.167.92.123 – 10.167.92.123	10.167.92.123
125	10.167.92.124/32	10.167.92.124 – 10.167.92.124	10.167.92.124
126	10.167.92.125/32	10.167.92.125 – 10.167.92.125	10.167.92.125
127	10.167.92.126/32	10.167.92.126 – 10.167.92.126	10.167.92.126
128	10.167.92.127/32	10.167.92.127 – 10.167.92.127	10.167.92.127

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 →