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)10.9.182.0/25

network10.9.182.0/25

broadcast10.9.182.127

first host10.9.182.1

last host10.9.182.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.9.182.0/25

address00001010.00001001.10110110.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00001001.10110110.00000000

broadcast00001010.00001001.10110110.01111111

green = network part, grey = host part

hex0x0a09b600

decimal168408576

reverse dns0.182.9.10.in-addr.arpa

ipv4-mapped::ffff:a09:b600

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.9.182.0/32	10.9.182.0 – 10.9.182.0	10.9.182.0
2	10.9.182.1/32	10.9.182.1 – 10.9.182.1	10.9.182.1
3	10.9.182.2/32	10.9.182.2 – 10.9.182.2	10.9.182.2
4	10.9.182.3/32	10.9.182.3 – 10.9.182.3	10.9.182.3
5	10.9.182.4/32	10.9.182.4 – 10.9.182.4	10.9.182.4
6	10.9.182.5/32	10.9.182.5 – 10.9.182.5	10.9.182.5
7	10.9.182.6/32	10.9.182.6 – 10.9.182.6	10.9.182.6
8	10.9.182.7/32	10.9.182.7 – 10.9.182.7	10.9.182.7
9	10.9.182.8/32	10.9.182.8 – 10.9.182.8	10.9.182.8
10	10.9.182.9/32	10.9.182.9 – 10.9.182.9	10.9.182.9
11	10.9.182.10/32	10.9.182.10 – 10.9.182.10	10.9.182.10
12	10.9.182.11/32	10.9.182.11 – 10.9.182.11	10.9.182.11
13	10.9.182.12/32	10.9.182.12 – 10.9.182.12	10.9.182.12
14	10.9.182.13/32	10.9.182.13 – 10.9.182.13	10.9.182.13
15	10.9.182.14/32	10.9.182.14 – 10.9.182.14	10.9.182.14
16	10.9.182.15/32	10.9.182.15 – 10.9.182.15	10.9.182.15
17	10.9.182.16/32	10.9.182.16 – 10.9.182.16	10.9.182.16
18	10.9.182.17/32	10.9.182.17 – 10.9.182.17	10.9.182.17
19	10.9.182.18/32	10.9.182.18 – 10.9.182.18	10.9.182.18
20	10.9.182.19/32	10.9.182.19 – 10.9.182.19	10.9.182.19
21	10.9.182.20/32	10.9.182.20 – 10.9.182.20	10.9.182.20
22	10.9.182.21/32	10.9.182.21 – 10.9.182.21	10.9.182.21
23	10.9.182.22/32	10.9.182.22 – 10.9.182.22	10.9.182.22
24	10.9.182.23/32	10.9.182.23 – 10.9.182.23	10.9.182.23
25	10.9.182.24/32	10.9.182.24 – 10.9.182.24	10.9.182.24
26	10.9.182.25/32	10.9.182.25 – 10.9.182.25	10.9.182.25
27	10.9.182.26/32	10.9.182.26 – 10.9.182.26	10.9.182.26
28	10.9.182.27/32	10.9.182.27 – 10.9.182.27	10.9.182.27
29	10.9.182.28/32	10.9.182.28 – 10.9.182.28	10.9.182.28
30	10.9.182.29/32	10.9.182.29 – 10.9.182.29	10.9.182.29
31	10.9.182.30/32	10.9.182.30 – 10.9.182.30	10.9.182.30
32	10.9.182.31/32	10.9.182.31 – 10.9.182.31	10.9.182.31
33	10.9.182.32/32	10.9.182.32 – 10.9.182.32	10.9.182.32
34	10.9.182.33/32	10.9.182.33 – 10.9.182.33	10.9.182.33
35	10.9.182.34/32	10.9.182.34 – 10.9.182.34	10.9.182.34
36	10.9.182.35/32	10.9.182.35 – 10.9.182.35	10.9.182.35
37	10.9.182.36/32	10.9.182.36 – 10.9.182.36	10.9.182.36
38	10.9.182.37/32	10.9.182.37 – 10.9.182.37	10.9.182.37
39	10.9.182.38/32	10.9.182.38 – 10.9.182.38	10.9.182.38
40	10.9.182.39/32	10.9.182.39 – 10.9.182.39	10.9.182.39
41	10.9.182.40/32	10.9.182.40 – 10.9.182.40	10.9.182.40
42	10.9.182.41/32	10.9.182.41 – 10.9.182.41	10.9.182.41
43	10.9.182.42/32	10.9.182.42 – 10.9.182.42	10.9.182.42
44	10.9.182.43/32	10.9.182.43 – 10.9.182.43	10.9.182.43
45	10.9.182.44/32	10.9.182.44 – 10.9.182.44	10.9.182.44
46	10.9.182.45/32	10.9.182.45 – 10.9.182.45	10.9.182.45
47	10.9.182.46/32	10.9.182.46 – 10.9.182.46	10.9.182.46
48	10.9.182.47/32	10.9.182.47 – 10.9.182.47	10.9.182.47
49	10.9.182.48/32	10.9.182.48 – 10.9.182.48	10.9.182.48
50	10.9.182.49/32	10.9.182.49 – 10.9.182.49	10.9.182.49
51	10.9.182.50/32	10.9.182.50 – 10.9.182.50	10.9.182.50
52	10.9.182.51/32	10.9.182.51 – 10.9.182.51	10.9.182.51
53	10.9.182.52/32	10.9.182.52 – 10.9.182.52	10.9.182.52
54	10.9.182.53/32	10.9.182.53 – 10.9.182.53	10.9.182.53
55	10.9.182.54/32	10.9.182.54 – 10.9.182.54	10.9.182.54
56	10.9.182.55/32	10.9.182.55 – 10.9.182.55	10.9.182.55
57	10.9.182.56/32	10.9.182.56 – 10.9.182.56	10.9.182.56
58	10.9.182.57/32	10.9.182.57 – 10.9.182.57	10.9.182.57
59	10.9.182.58/32	10.9.182.58 – 10.9.182.58	10.9.182.58
60	10.9.182.59/32	10.9.182.59 – 10.9.182.59	10.9.182.59
61	10.9.182.60/32	10.9.182.60 – 10.9.182.60	10.9.182.60
62	10.9.182.61/32	10.9.182.61 – 10.9.182.61	10.9.182.61
63	10.9.182.62/32	10.9.182.62 – 10.9.182.62	10.9.182.62
64	10.9.182.63/32	10.9.182.63 – 10.9.182.63	10.9.182.63
65	10.9.182.64/32	10.9.182.64 – 10.9.182.64	10.9.182.64
66	10.9.182.65/32	10.9.182.65 – 10.9.182.65	10.9.182.65
67	10.9.182.66/32	10.9.182.66 – 10.9.182.66	10.9.182.66
68	10.9.182.67/32	10.9.182.67 – 10.9.182.67	10.9.182.67
69	10.9.182.68/32	10.9.182.68 – 10.9.182.68	10.9.182.68
70	10.9.182.69/32	10.9.182.69 – 10.9.182.69	10.9.182.69
71	10.9.182.70/32	10.9.182.70 – 10.9.182.70	10.9.182.70
72	10.9.182.71/32	10.9.182.71 – 10.9.182.71	10.9.182.71
73	10.9.182.72/32	10.9.182.72 – 10.9.182.72	10.9.182.72
74	10.9.182.73/32	10.9.182.73 – 10.9.182.73	10.9.182.73
75	10.9.182.74/32	10.9.182.74 – 10.9.182.74	10.9.182.74
76	10.9.182.75/32	10.9.182.75 – 10.9.182.75	10.9.182.75
77	10.9.182.76/32	10.9.182.76 – 10.9.182.76	10.9.182.76
78	10.9.182.77/32	10.9.182.77 – 10.9.182.77	10.9.182.77
79	10.9.182.78/32	10.9.182.78 – 10.9.182.78	10.9.182.78
80	10.9.182.79/32	10.9.182.79 – 10.9.182.79	10.9.182.79
81	10.9.182.80/32	10.9.182.80 – 10.9.182.80	10.9.182.80
82	10.9.182.81/32	10.9.182.81 – 10.9.182.81	10.9.182.81
83	10.9.182.82/32	10.9.182.82 – 10.9.182.82	10.9.182.82
84	10.9.182.83/32	10.9.182.83 – 10.9.182.83	10.9.182.83
85	10.9.182.84/32	10.9.182.84 – 10.9.182.84	10.9.182.84
86	10.9.182.85/32	10.9.182.85 – 10.9.182.85	10.9.182.85
87	10.9.182.86/32	10.9.182.86 – 10.9.182.86	10.9.182.86
88	10.9.182.87/32	10.9.182.87 – 10.9.182.87	10.9.182.87
89	10.9.182.88/32	10.9.182.88 – 10.9.182.88	10.9.182.88
90	10.9.182.89/32	10.9.182.89 – 10.9.182.89	10.9.182.89
91	10.9.182.90/32	10.9.182.90 – 10.9.182.90	10.9.182.90
92	10.9.182.91/32	10.9.182.91 – 10.9.182.91	10.9.182.91
93	10.9.182.92/32	10.9.182.92 – 10.9.182.92	10.9.182.92
94	10.9.182.93/32	10.9.182.93 – 10.9.182.93	10.9.182.93
95	10.9.182.94/32	10.9.182.94 – 10.9.182.94	10.9.182.94
96	10.9.182.95/32	10.9.182.95 – 10.9.182.95	10.9.182.95
97	10.9.182.96/32	10.9.182.96 – 10.9.182.96	10.9.182.96
98	10.9.182.97/32	10.9.182.97 – 10.9.182.97	10.9.182.97
99	10.9.182.98/32	10.9.182.98 – 10.9.182.98	10.9.182.98
100	10.9.182.99/32	10.9.182.99 – 10.9.182.99	10.9.182.99
101	10.9.182.100/32	10.9.182.100 – 10.9.182.100	10.9.182.100
102	10.9.182.101/32	10.9.182.101 – 10.9.182.101	10.9.182.101
103	10.9.182.102/32	10.9.182.102 – 10.9.182.102	10.9.182.102
104	10.9.182.103/32	10.9.182.103 – 10.9.182.103	10.9.182.103
105	10.9.182.104/32	10.9.182.104 – 10.9.182.104	10.9.182.104
106	10.9.182.105/32	10.9.182.105 – 10.9.182.105	10.9.182.105
107	10.9.182.106/32	10.9.182.106 – 10.9.182.106	10.9.182.106
108	10.9.182.107/32	10.9.182.107 – 10.9.182.107	10.9.182.107
109	10.9.182.108/32	10.9.182.108 – 10.9.182.108	10.9.182.108
110	10.9.182.109/32	10.9.182.109 – 10.9.182.109	10.9.182.109
111	10.9.182.110/32	10.9.182.110 – 10.9.182.110	10.9.182.110
112	10.9.182.111/32	10.9.182.111 – 10.9.182.111	10.9.182.111
113	10.9.182.112/32	10.9.182.112 – 10.9.182.112	10.9.182.112
114	10.9.182.113/32	10.9.182.113 – 10.9.182.113	10.9.182.113
115	10.9.182.114/32	10.9.182.114 – 10.9.182.114	10.9.182.114
116	10.9.182.115/32	10.9.182.115 – 10.9.182.115	10.9.182.115
117	10.9.182.116/32	10.9.182.116 – 10.9.182.116	10.9.182.116
118	10.9.182.117/32	10.9.182.117 – 10.9.182.117	10.9.182.117
119	10.9.182.118/32	10.9.182.118 – 10.9.182.118	10.9.182.118
120	10.9.182.119/32	10.9.182.119 – 10.9.182.119	10.9.182.119
121	10.9.182.120/32	10.9.182.120 – 10.9.182.120	10.9.182.120
122	10.9.182.121/32	10.9.182.121 – 10.9.182.121	10.9.182.121
123	10.9.182.122/32	10.9.182.122 – 10.9.182.122	10.9.182.122
124	10.9.182.123/32	10.9.182.123 – 10.9.182.123	10.9.182.123
125	10.9.182.124/32	10.9.182.124 – 10.9.182.124	10.9.182.124
126	10.9.182.125/32	10.9.182.125 – 10.9.182.125	10.9.182.125
127	10.9.182.126/32	10.9.182.126 – 10.9.182.126	10.9.182.126
128	10.9.182.127/32	10.9.182.127 – 10.9.182.127	10.9.182.127

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 →