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)10.167.46.0/25

network10.167.46.0/25

broadcast10.167.46.127

first host10.167.46.1

last host10.167.46.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.46.0/25

address00001010.10100111.00101110.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.00101110.00000000

broadcast00001010.10100111.00101110.01111111

green = network part, grey = host part

hex0x0aa72e00

decimal178728448

reverse dns0.46.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:2e00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.46.0/32	10.167.46.0 – 10.167.46.0	10.167.46.0
2	10.167.46.1/32	10.167.46.1 – 10.167.46.1	10.167.46.1
3	10.167.46.2/32	10.167.46.2 – 10.167.46.2	10.167.46.2
4	10.167.46.3/32	10.167.46.3 – 10.167.46.3	10.167.46.3
5	10.167.46.4/32	10.167.46.4 – 10.167.46.4	10.167.46.4
6	10.167.46.5/32	10.167.46.5 – 10.167.46.5	10.167.46.5
7	10.167.46.6/32	10.167.46.6 – 10.167.46.6	10.167.46.6
8	10.167.46.7/32	10.167.46.7 – 10.167.46.7	10.167.46.7
9	10.167.46.8/32	10.167.46.8 – 10.167.46.8	10.167.46.8
10	10.167.46.9/32	10.167.46.9 – 10.167.46.9	10.167.46.9
11	10.167.46.10/32	10.167.46.10 – 10.167.46.10	10.167.46.10
12	10.167.46.11/32	10.167.46.11 – 10.167.46.11	10.167.46.11
13	10.167.46.12/32	10.167.46.12 – 10.167.46.12	10.167.46.12
14	10.167.46.13/32	10.167.46.13 – 10.167.46.13	10.167.46.13
15	10.167.46.14/32	10.167.46.14 – 10.167.46.14	10.167.46.14
16	10.167.46.15/32	10.167.46.15 – 10.167.46.15	10.167.46.15
17	10.167.46.16/32	10.167.46.16 – 10.167.46.16	10.167.46.16
18	10.167.46.17/32	10.167.46.17 – 10.167.46.17	10.167.46.17
19	10.167.46.18/32	10.167.46.18 – 10.167.46.18	10.167.46.18
20	10.167.46.19/32	10.167.46.19 – 10.167.46.19	10.167.46.19
21	10.167.46.20/32	10.167.46.20 – 10.167.46.20	10.167.46.20
22	10.167.46.21/32	10.167.46.21 – 10.167.46.21	10.167.46.21
23	10.167.46.22/32	10.167.46.22 – 10.167.46.22	10.167.46.22
24	10.167.46.23/32	10.167.46.23 – 10.167.46.23	10.167.46.23
25	10.167.46.24/32	10.167.46.24 – 10.167.46.24	10.167.46.24
26	10.167.46.25/32	10.167.46.25 – 10.167.46.25	10.167.46.25
27	10.167.46.26/32	10.167.46.26 – 10.167.46.26	10.167.46.26
28	10.167.46.27/32	10.167.46.27 – 10.167.46.27	10.167.46.27
29	10.167.46.28/32	10.167.46.28 – 10.167.46.28	10.167.46.28
30	10.167.46.29/32	10.167.46.29 – 10.167.46.29	10.167.46.29
31	10.167.46.30/32	10.167.46.30 – 10.167.46.30	10.167.46.30
32	10.167.46.31/32	10.167.46.31 – 10.167.46.31	10.167.46.31
33	10.167.46.32/32	10.167.46.32 – 10.167.46.32	10.167.46.32
34	10.167.46.33/32	10.167.46.33 – 10.167.46.33	10.167.46.33
35	10.167.46.34/32	10.167.46.34 – 10.167.46.34	10.167.46.34
36	10.167.46.35/32	10.167.46.35 – 10.167.46.35	10.167.46.35
37	10.167.46.36/32	10.167.46.36 – 10.167.46.36	10.167.46.36
38	10.167.46.37/32	10.167.46.37 – 10.167.46.37	10.167.46.37
39	10.167.46.38/32	10.167.46.38 – 10.167.46.38	10.167.46.38
40	10.167.46.39/32	10.167.46.39 – 10.167.46.39	10.167.46.39
41	10.167.46.40/32	10.167.46.40 – 10.167.46.40	10.167.46.40
42	10.167.46.41/32	10.167.46.41 – 10.167.46.41	10.167.46.41
43	10.167.46.42/32	10.167.46.42 – 10.167.46.42	10.167.46.42
44	10.167.46.43/32	10.167.46.43 – 10.167.46.43	10.167.46.43
45	10.167.46.44/32	10.167.46.44 – 10.167.46.44	10.167.46.44
46	10.167.46.45/32	10.167.46.45 – 10.167.46.45	10.167.46.45
47	10.167.46.46/32	10.167.46.46 – 10.167.46.46	10.167.46.46
48	10.167.46.47/32	10.167.46.47 – 10.167.46.47	10.167.46.47
49	10.167.46.48/32	10.167.46.48 – 10.167.46.48	10.167.46.48
50	10.167.46.49/32	10.167.46.49 – 10.167.46.49	10.167.46.49
51	10.167.46.50/32	10.167.46.50 – 10.167.46.50	10.167.46.50
52	10.167.46.51/32	10.167.46.51 – 10.167.46.51	10.167.46.51
53	10.167.46.52/32	10.167.46.52 – 10.167.46.52	10.167.46.52
54	10.167.46.53/32	10.167.46.53 – 10.167.46.53	10.167.46.53
55	10.167.46.54/32	10.167.46.54 – 10.167.46.54	10.167.46.54
56	10.167.46.55/32	10.167.46.55 – 10.167.46.55	10.167.46.55
57	10.167.46.56/32	10.167.46.56 – 10.167.46.56	10.167.46.56
58	10.167.46.57/32	10.167.46.57 – 10.167.46.57	10.167.46.57
59	10.167.46.58/32	10.167.46.58 – 10.167.46.58	10.167.46.58
60	10.167.46.59/32	10.167.46.59 – 10.167.46.59	10.167.46.59
61	10.167.46.60/32	10.167.46.60 – 10.167.46.60	10.167.46.60
62	10.167.46.61/32	10.167.46.61 – 10.167.46.61	10.167.46.61
63	10.167.46.62/32	10.167.46.62 – 10.167.46.62	10.167.46.62
64	10.167.46.63/32	10.167.46.63 – 10.167.46.63	10.167.46.63
65	10.167.46.64/32	10.167.46.64 – 10.167.46.64	10.167.46.64
66	10.167.46.65/32	10.167.46.65 – 10.167.46.65	10.167.46.65
67	10.167.46.66/32	10.167.46.66 – 10.167.46.66	10.167.46.66
68	10.167.46.67/32	10.167.46.67 – 10.167.46.67	10.167.46.67
69	10.167.46.68/32	10.167.46.68 – 10.167.46.68	10.167.46.68
70	10.167.46.69/32	10.167.46.69 – 10.167.46.69	10.167.46.69
71	10.167.46.70/32	10.167.46.70 – 10.167.46.70	10.167.46.70
72	10.167.46.71/32	10.167.46.71 – 10.167.46.71	10.167.46.71
73	10.167.46.72/32	10.167.46.72 – 10.167.46.72	10.167.46.72
74	10.167.46.73/32	10.167.46.73 – 10.167.46.73	10.167.46.73
75	10.167.46.74/32	10.167.46.74 – 10.167.46.74	10.167.46.74
76	10.167.46.75/32	10.167.46.75 – 10.167.46.75	10.167.46.75
77	10.167.46.76/32	10.167.46.76 – 10.167.46.76	10.167.46.76
78	10.167.46.77/32	10.167.46.77 – 10.167.46.77	10.167.46.77
79	10.167.46.78/32	10.167.46.78 – 10.167.46.78	10.167.46.78
80	10.167.46.79/32	10.167.46.79 – 10.167.46.79	10.167.46.79
81	10.167.46.80/32	10.167.46.80 – 10.167.46.80	10.167.46.80
82	10.167.46.81/32	10.167.46.81 – 10.167.46.81	10.167.46.81
83	10.167.46.82/32	10.167.46.82 – 10.167.46.82	10.167.46.82
84	10.167.46.83/32	10.167.46.83 – 10.167.46.83	10.167.46.83
85	10.167.46.84/32	10.167.46.84 – 10.167.46.84	10.167.46.84
86	10.167.46.85/32	10.167.46.85 – 10.167.46.85	10.167.46.85
87	10.167.46.86/32	10.167.46.86 – 10.167.46.86	10.167.46.86
88	10.167.46.87/32	10.167.46.87 – 10.167.46.87	10.167.46.87
89	10.167.46.88/32	10.167.46.88 – 10.167.46.88	10.167.46.88
90	10.167.46.89/32	10.167.46.89 – 10.167.46.89	10.167.46.89
91	10.167.46.90/32	10.167.46.90 – 10.167.46.90	10.167.46.90
92	10.167.46.91/32	10.167.46.91 – 10.167.46.91	10.167.46.91
93	10.167.46.92/32	10.167.46.92 – 10.167.46.92	10.167.46.92
94	10.167.46.93/32	10.167.46.93 – 10.167.46.93	10.167.46.93
95	10.167.46.94/32	10.167.46.94 – 10.167.46.94	10.167.46.94
96	10.167.46.95/32	10.167.46.95 – 10.167.46.95	10.167.46.95
97	10.167.46.96/32	10.167.46.96 – 10.167.46.96	10.167.46.96
98	10.167.46.97/32	10.167.46.97 – 10.167.46.97	10.167.46.97
99	10.167.46.98/32	10.167.46.98 – 10.167.46.98	10.167.46.98
100	10.167.46.99/32	10.167.46.99 – 10.167.46.99	10.167.46.99
101	10.167.46.100/32	10.167.46.100 – 10.167.46.100	10.167.46.100
102	10.167.46.101/32	10.167.46.101 – 10.167.46.101	10.167.46.101
103	10.167.46.102/32	10.167.46.102 – 10.167.46.102	10.167.46.102
104	10.167.46.103/32	10.167.46.103 – 10.167.46.103	10.167.46.103
105	10.167.46.104/32	10.167.46.104 – 10.167.46.104	10.167.46.104
106	10.167.46.105/32	10.167.46.105 – 10.167.46.105	10.167.46.105
107	10.167.46.106/32	10.167.46.106 – 10.167.46.106	10.167.46.106
108	10.167.46.107/32	10.167.46.107 – 10.167.46.107	10.167.46.107
109	10.167.46.108/32	10.167.46.108 – 10.167.46.108	10.167.46.108
110	10.167.46.109/32	10.167.46.109 – 10.167.46.109	10.167.46.109
111	10.167.46.110/32	10.167.46.110 – 10.167.46.110	10.167.46.110
112	10.167.46.111/32	10.167.46.111 – 10.167.46.111	10.167.46.111
113	10.167.46.112/32	10.167.46.112 – 10.167.46.112	10.167.46.112
114	10.167.46.113/32	10.167.46.113 – 10.167.46.113	10.167.46.113
115	10.167.46.114/32	10.167.46.114 – 10.167.46.114	10.167.46.114
116	10.167.46.115/32	10.167.46.115 – 10.167.46.115	10.167.46.115
117	10.167.46.116/32	10.167.46.116 – 10.167.46.116	10.167.46.116
118	10.167.46.117/32	10.167.46.117 – 10.167.46.117	10.167.46.117
119	10.167.46.118/32	10.167.46.118 – 10.167.46.118	10.167.46.118
120	10.167.46.119/32	10.167.46.119 – 10.167.46.119	10.167.46.119
121	10.167.46.120/32	10.167.46.120 – 10.167.46.120	10.167.46.120
122	10.167.46.121/32	10.167.46.121 – 10.167.46.121	10.167.46.121
123	10.167.46.122/32	10.167.46.122 – 10.167.46.122	10.167.46.122
124	10.167.46.123/32	10.167.46.123 – 10.167.46.123	10.167.46.123
125	10.167.46.124/32	10.167.46.124 – 10.167.46.124	10.167.46.124
126	10.167.46.125/32	10.167.46.125 – 10.167.46.125	10.167.46.125
127	10.167.46.126/32	10.167.46.126 – 10.167.46.126	10.167.46.126
128	10.167.46.127/32	10.167.46.127 – 10.167.46.127	10.167.46.127

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 →