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)10.167.11.0/25

network10.167.11.0/25

broadcast10.167.11.127

first host10.167.11.1

last host10.167.11.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.11.0/25

address00001010.10100111.00001011.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.00001011.00000000

broadcast00001010.10100111.00001011.01111111

green = network part, grey = host part

hex0x0aa70b00

decimal178719488

reverse dns0.11.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:b00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.11.0/32	10.167.11.0 – 10.167.11.0	10.167.11.0
2	10.167.11.1/32	10.167.11.1 – 10.167.11.1	10.167.11.1
3	10.167.11.2/32	10.167.11.2 – 10.167.11.2	10.167.11.2
4	10.167.11.3/32	10.167.11.3 – 10.167.11.3	10.167.11.3
5	10.167.11.4/32	10.167.11.4 – 10.167.11.4	10.167.11.4
6	10.167.11.5/32	10.167.11.5 – 10.167.11.5	10.167.11.5
7	10.167.11.6/32	10.167.11.6 – 10.167.11.6	10.167.11.6
8	10.167.11.7/32	10.167.11.7 – 10.167.11.7	10.167.11.7
9	10.167.11.8/32	10.167.11.8 – 10.167.11.8	10.167.11.8
10	10.167.11.9/32	10.167.11.9 – 10.167.11.9	10.167.11.9
11	10.167.11.10/32	10.167.11.10 – 10.167.11.10	10.167.11.10
12	10.167.11.11/32	10.167.11.11 – 10.167.11.11	10.167.11.11
13	10.167.11.12/32	10.167.11.12 – 10.167.11.12	10.167.11.12
14	10.167.11.13/32	10.167.11.13 – 10.167.11.13	10.167.11.13
15	10.167.11.14/32	10.167.11.14 – 10.167.11.14	10.167.11.14
16	10.167.11.15/32	10.167.11.15 – 10.167.11.15	10.167.11.15
17	10.167.11.16/32	10.167.11.16 – 10.167.11.16	10.167.11.16
18	10.167.11.17/32	10.167.11.17 – 10.167.11.17	10.167.11.17
19	10.167.11.18/32	10.167.11.18 – 10.167.11.18	10.167.11.18
20	10.167.11.19/32	10.167.11.19 – 10.167.11.19	10.167.11.19
21	10.167.11.20/32	10.167.11.20 – 10.167.11.20	10.167.11.20
22	10.167.11.21/32	10.167.11.21 – 10.167.11.21	10.167.11.21
23	10.167.11.22/32	10.167.11.22 – 10.167.11.22	10.167.11.22
24	10.167.11.23/32	10.167.11.23 – 10.167.11.23	10.167.11.23
25	10.167.11.24/32	10.167.11.24 – 10.167.11.24	10.167.11.24
26	10.167.11.25/32	10.167.11.25 – 10.167.11.25	10.167.11.25
27	10.167.11.26/32	10.167.11.26 – 10.167.11.26	10.167.11.26
28	10.167.11.27/32	10.167.11.27 – 10.167.11.27	10.167.11.27
29	10.167.11.28/32	10.167.11.28 – 10.167.11.28	10.167.11.28
30	10.167.11.29/32	10.167.11.29 – 10.167.11.29	10.167.11.29
31	10.167.11.30/32	10.167.11.30 – 10.167.11.30	10.167.11.30
32	10.167.11.31/32	10.167.11.31 – 10.167.11.31	10.167.11.31
33	10.167.11.32/32	10.167.11.32 – 10.167.11.32	10.167.11.32
34	10.167.11.33/32	10.167.11.33 – 10.167.11.33	10.167.11.33
35	10.167.11.34/32	10.167.11.34 – 10.167.11.34	10.167.11.34
36	10.167.11.35/32	10.167.11.35 – 10.167.11.35	10.167.11.35
37	10.167.11.36/32	10.167.11.36 – 10.167.11.36	10.167.11.36
38	10.167.11.37/32	10.167.11.37 – 10.167.11.37	10.167.11.37
39	10.167.11.38/32	10.167.11.38 – 10.167.11.38	10.167.11.38
40	10.167.11.39/32	10.167.11.39 – 10.167.11.39	10.167.11.39
41	10.167.11.40/32	10.167.11.40 – 10.167.11.40	10.167.11.40
42	10.167.11.41/32	10.167.11.41 – 10.167.11.41	10.167.11.41
43	10.167.11.42/32	10.167.11.42 – 10.167.11.42	10.167.11.42
44	10.167.11.43/32	10.167.11.43 – 10.167.11.43	10.167.11.43
45	10.167.11.44/32	10.167.11.44 – 10.167.11.44	10.167.11.44
46	10.167.11.45/32	10.167.11.45 – 10.167.11.45	10.167.11.45
47	10.167.11.46/32	10.167.11.46 – 10.167.11.46	10.167.11.46
48	10.167.11.47/32	10.167.11.47 – 10.167.11.47	10.167.11.47
49	10.167.11.48/32	10.167.11.48 – 10.167.11.48	10.167.11.48
50	10.167.11.49/32	10.167.11.49 – 10.167.11.49	10.167.11.49
51	10.167.11.50/32	10.167.11.50 – 10.167.11.50	10.167.11.50
52	10.167.11.51/32	10.167.11.51 – 10.167.11.51	10.167.11.51
53	10.167.11.52/32	10.167.11.52 – 10.167.11.52	10.167.11.52
54	10.167.11.53/32	10.167.11.53 – 10.167.11.53	10.167.11.53
55	10.167.11.54/32	10.167.11.54 – 10.167.11.54	10.167.11.54
56	10.167.11.55/32	10.167.11.55 – 10.167.11.55	10.167.11.55
57	10.167.11.56/32	10.167.11.56 – 10.167.11.56	10.167.11.56
58	10.167.11.57/32	10.167.11.57 – 10.167.11.57	10.167.11.57
59	10.167.11.58/32	10.167.11.58 – 10.167.11.58	10.167.11.58
60	10.167.11.59/32	10.167.11.59 – 10.167.11.59	10.167.11.59
61	10.167.11.60/32	10.167.11.60 – 10.167.11.60	10.167.11.60
62	10.167.11.61/32	10.167.11.61 – 10.167.11.61	10.167.11.61
63	10.167.11.62/32	10.167.11.62 – 10.167.11.62	10.167.11.62
64	10.167.11.63/32	10.167.11.63 – 10.167.11.63	10.167.11.63
65	10.167.11.64/32	10.167.11.64 – 10.167.11.64	10.167.11.64
66	10.167.11.65/32	10.167.11.65 – 10.167.11.65	10.167.11.65
67	10.167.11.66/32	10.167.11.66 – 10.167.11.66	10.167.11.66
68	10.167.11.67/32	10.167.11.67 – 10.167.11.67	10.167.11.67
69	10.167.11.68/32	10.167.11.68 – 10.167.11.68	10.167.11.68
70	10.167.11.69/32	10.167.11.69 – 10.167.11.69	10.167.11.69
71	10.167.11.70/32	10.167.11.70 – 10.167.11.70	10.167.11.70
72	10.167.11.71/32	10.167.11.71 – 10.167.11.71	10.167.11.71
73	10.167.11.72/32	10.167.11.72 – 10.167.11.72	10.167.11.72
74	10.167.11.73/32	10.167.11.73 – 10.167.11.73	10.167.11.73
75	10.167.11.74/32	10.167.11.74 – 10.167.11.74	10.167.11.74
76	10.167.11.75/32	10.167.11.75 – 10.167.11.75	10.167.11.75
77	10.167.11.76/32	10.167.11.76 – 10.167.11.76	10.167.11.76
78	10.167.11.77/32	10.167.11.77 – 10.167.11.77	10.167.11.77
79	10.167.11.78/32	10.167.11.78 – 10.167.11.78	10.167.11.78
80	10.167.11.79/32	10.167.11.79 – 10.167.11.79	10.167.11.79
81	10.167.11.80/32	10.167.11.80 – 10.167.11.80	10.167.11.80
82	10.167.11.81/32	10.167.11.81 – 10.167.11.81	10.167.11.81
83	10.167.11.82/32	10.167.11.82 – 10.167.11.82	10.167.11.82
84	10.167.11.83/32	10.167.11.83 – 10.167.11.83	10.167.11.83
85	10.167.11.84/32	10.167.11.84 – 10.167.11.84	10.167.11.84
86	10.167.11.85/32	10.167.11.85 – 10.167.11.85	10.167.11.85
87	10.167.11.86/32	10.167.11.86 – 10.167.11.86	10.167.11.86
88	10.167.11.87/32	10.167.11.87 – 10.167.11.87	10.167.11.87
89	10.167.11.88/32	10.167.11.88 – 10.167.11.88	10.167.11.88
90	10.167.11.89/32	10.167.11.89 – 10.167.11.89	10.167.11.89
91	10.167.11.90/32	10.167.11.90 – 10.167.11.90	10.167.11.90
92	10.167.11.91/32	10.167.11.91 – 10.167.11.91	10.167.11.91
93	10.167.11.92/32	10.167.11.92 – 10.167.11.92	10.167.11.92
94	10.167.11.93/32	10.167.11.93 – 10.167.11.93	10.167.11.93
95	10.167.11.94/32	10.167.11.94 – 10.167.11.94	10.167.11.94
96	10.167.11.95/32	10.167.11.95 – 10.167.11.95	10.167.11.95
97	10.167.11.96/32	10.167.11.96 – 10.167.11.96	10.167.11.96
98	10.167.11.97/32	10.167.11.97 – 10.167.11.97	10.167.11.97
99	10.167.11.98/32	10.167.11.98 – 10.167.11.98	10.167.11.98
100	10.167.11.99/32	10.167.11.99 – 10.167.11.99	10.167.11.99
101	10.167.11.100/32	10.167.11.100 – 10.167.11.100	10.167.11.100
102	10.167.11.101/32	10.167.11.101 – 10.167.11.101	10.167.11.101
103	10.167.11.102/32	10.167.11.102 – 10.167.11.102	10.167.11.102
104	10.167.11.103/32	10.167.11.103 – 10.167.11.103	10.167.11.103
105	10.167.11.104/32	10.167.11.104 – 10.167.11.104	10.167.11.104
106	10.167.11.105/32	10.167.11.105 – 10.167.11.105	10.167.11.105
107	10.167.11.106/32	10.167.11.106 – 10.167.11.106	10.167.11.106
108	10.167.11.107/32	10.167.11.107 – 10.167.11.107	10.167.11.107
109	10.167.11.108/32	10.167.11.108 – 10.167.11.108	10.167.11.108
110	10.167.11.109/32	10.167.11.109 – 10.167.11.109	10.167.11.109
111	10.167.11.110/32	10.167.11.110 – 10.167.11.110	10.167.11.110
112	10.167.11.111/32	10.167.11.111 – 10.167.11.111	10.167.11.111
113	10.167.11.112/32	10.167.11.112 – 10.167.11.112	10.167.11.112
114	10.167.11.113/32	10.167.11.113 – 10.167.11.113	10.167.11.113
115	10.167.11.114/32	10.167.11.114 – 10.167.11.114	10.167.11.114
116	10.167.11.115/32	10.167.11.115 – 10.167.11.115	10.167.11.115
117	10.167.11.116/32	10.167.11.116 – 10.167.11.116	10.167.11.116
118	10.167.11.117/32	10.167.11.117 – 10.167.11.117	10.167.11.117
119	10.167.11.118/32	10.167.11.118 – 10.167.11.118	10.167.11.118
120	10.167.11.119/32	10.167.11.119 – 10.167.11.119	10.167.11.119
121	10.167.11.120/32	10.167.11.120 – 10.167.11.120	10.167.11.120
122	10.167.11.121/32	10.167.11.121 – 10.167.11.121	10.167.11.121
123	10.167.11.122/32	10.167.11.122 – 10.167.11.122	10.167.11.122
124	10.167.11.123/32	10.167.11.123 – 10.167.11.123	10.167.11.123
125	10.167.11.124/32	10.167.11.124 – 10.167.11.124	10.167.11.124
126	10.167.11.125/32	10.167.11.125 – 10.167.11.125	10.167.11.125
127	10.167.11.126/32	10.167.11.126 – 10.167.11.126	10.167.11.126
128	10.167.11.127/32	10.167.11.127 – 10.167.11.127	10.167.11.127

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 →