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)10.9.76.0/25

network10.9.76.0/25

broadcast10.9.76.127

first host10.9.76.1

last host10.9.76.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.9.76.0/25

address00001010.00001001.01001100.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00001001.01001100.00000000

broadcast00001010.00001001.01001100.01111111

green = network part, grey = host part

hex0x0a094c00

decimal168381440

reverse dns0.76.9.10.in-addr.arpa

ipv4-mapped::ffff:a09:4c00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.9.76.0/32	10.9.76.0 – 10.9.76.0	10.9.76.0
2	10.9.76.1/32	10.9.76.1 – 10.9.76.1	10.9.76.1
3	10.9.76.2/32	10.9.76.2 – 10.9.76.2	10.9.76.2
4	10.9.76.3/32	10.9.76.3 – 10.9.76.3	10.9.76.3
5	10.9.76.4/32	10.9.76.4 – 10.9.76.4	10.9.76.4
6	10.9.76.5/32	10.9.76.5 – 10.9.76.5	10.9.76.5
7	10.9.76.6/32	10.9.76.6 – 10.9.76.6	10.9.76.6
8	10.9.76.7/32	10.9.76.7 – 10.9.76.7	10.9.76.7
9	10.9.76.8/32	10.9.76.8 – 10.9.76.8	10.9.76.8
10	10.9.76.9/32	10.9.76.9 – 10.9.76.9	10.9.76.9
11	10.9.76.10/32	10.9.76.10 – 10.9.76.10	10.9.76.10
12	10.9.76.11/32	10.9.76.11 – 10.9.76.11	10.9.76.11
13	10.9.76.12/32	10.9.76.12 – 10.9.76.12	10.9.76.12
14	10.9.76.13/32	10.9.76.13 – 10.9.76.13	10.9.76.13
15	10.9.76.14/32	10.9.76.14 – 10.9.76.14	10.9.76.14
16	10.9.76.15/32	10.9.76.15 – 10.9.76.15	10.9.76.15
17	10.9.76.16/32	10.9.76.16 – 10.9.76.16	10.9.76.16
18	10.9.76.17/32	10.9.76.17 – 10.9.76.17	10.9.76.17
19	10.9.76.18/32	10.9.76.18 – 10.9.76.18	10.9.76.18
20	10.9.76.19/32	10.9.76.19 – 10.9.76.19	10.9.76.19
21	10.9.76.20/32	10.9.76.20 – 10.9.76.20	10.9.76.20
22	10.9.76.21/32	10.9.76.21 – 10.9.76.21	10.9.76.21
23	10.9.76.22/32	10.9.76.22 – 10.9.76.22	10.9.76.22
24	10.9.76.23/32	10.9.76.23 – 10.9.76.23	10.9.76.23
25	10.9.76.24/32	10.9.76.24 – 10.9.76.24	10.9.76.24
26	10.9.76.25/32	10.9.76.25 – 10.9.76.25	10.9.76.25
27	10.9.76.26/32	10.9.76.26 – 10.9.76.26	10.9.76.26
28	10.9.76.27/32	10.9.76.27 – 10.9.76.27	10.9.76.27
29	10.9.76.28/32	10.9.76.28 – 10.9.76.28	10.9.76.28
30	10.9.76.29/32	10.9.76.29 – 10.9.76.29	10.9.76.29
31	10.9.76.30/32	10.9.76.30 – 10.9.76.30	10.9.76.30
32	10.9.76.31/32	10.9.76.31 – 10.9.76.31	10.9.76.31
33	10.9.76.32/32	10.9.76.32 – 10.9.76.32	10.9.76.32
34	10.9.76.33/32	10.9.76.33 – 10.9.76.33	10.9.76.33
35	10.9.76.34/32	10.9.76.34 – 10.9.76.34	10.9.76.34
36	10.9.76.35/32	10.9.76.35 – 10.9.76.35	10.9.76.35
37	10.9.76.36/32	10.9.76.36 – 10.9.76.36	10.9.76.36
38	10.9.76.37/32	10.9.76.37 – 10.9.76.37	10.9.76.37
39	10.9.76.38/32	10.9.76.38 – 10.9.76.38	10.9.76.38
40	10.9.76.39/32	10.9.76.39 – 10.9.76.39	10.9.76.39
41	10.9.76.40/32	10.9.76.40 – 10.9.76.40	10.9.76.40
42	10.9.76.41/32	10.9.76.41 – 10.9.76.41	10.9.76.41
43	10.9.76.42/32	10.9.76.42 – 10.9.76.42	10.9.76.42
44	10.9.76.43/32	10.9.76.43 – 10.9.76.43	10.9.76.43
45	10.9.76.44/32	10.9.76.44 – 10.9.76.44	10.9.76.44
46	10.9.76.45/32	10.9.76.45 – 10.9.76.45	10.9.76.45
47	10.9.76.46/32	10.9.76.46 – 10.9.76.46	10.9.76.46
48	10.9.76.47/32	10.9.76.47 – 10.9.76.47	10.9.76.47
49	10.9.76.48/32	10.9.76.48 – 10.9.76.48	10.9.76.48
50	10.9.76.49/32	10.9.76.49 – 10.9.76.49	10.9.76.49
51	10.9.76.50/32	10.9.76.50 – 10.9.76.50	10.9.76.50
52	10.9.76.51/32	10.9.76.51 – 10.9.76.51	10.9.76.51
53	10.9.76.52/32	10.9.76.52 – 10.9.76.52	10.9.76.52
54	10.9.76.53/32	10.9.76.53 – 10.9.76.53	10.9.76.53
55	10.9.76.54/32	10.9.76.54 – 10.9.76.54	10.9.76.54
56	10.9.76.55/32	10.9.76.55 – 10.9.76.55	10.9.76.55
57	10.9.76.56/32	10.9.76.56 – 10.9.76.56	10.9.76.56
58	10.9.76.57/32	10.9.76.57 – 10.9.76.57	10.9.76.57
59	10.9.76.58/32	10.9.76.58 – 10.9.76.58	10.9.76.58
60	10.9.76.59/32	10.9.76.59 – 10.9.76.59	10.9.76.59
61	10.9.76.60/32	10.9.76.60 – 10.9.76.60	10.9.76.60
62	10.9.76.61/32	10.9.76.61 – 10.9.76.61	10.9.76.61
63	10.9.76.62/32	10.9.76.62 – 10.9.76.62	10.9.76.62
64	10.9.76.63/32	10.9.76.63 – 10.9.76.63	10.9.76.63
65	10.9.76.64/32	10.9.76.64 – 10.9.76.64	10.9.76.64
66	10.9.76.65/32	10.9.76.65 – 10.9.76.65	10.9.76.65
67	10.9.76.66/32	10.9.76.66 – 10.9.76.66	10.9.76.66
68	10.9.76.67/32	10.9.76.67 – 10.9.76.67	10.9.76.67
69	10.9.76.68/32	10.9.76.68 – 10.9.76.68	10.9.76.68
70	10.9.76.69/32	10.9.76.69 – 10.9.76.69	10.9.76.69
71	10.9.76.70/32	10.9.76.70 – 10.9.76.70	10.9.76.70
72	10.9.76.71/32	10.9.76.71 – 10.9.76.71	10.9.76.71
73	10.9.76.72/32	10.9.76.72 – 10.9.76.72	10.9.76.72
74	10.9.76.73/32	10.9.76.73 – 10.9.76.73	10.9.76.73
75	10.9.76.74/32	10.9.76.74 – 10.9.76.74	10.9.76.74
76	10.9.76.75/32	10.9.76.75 – 10.9.76.75	10.9.76.75
77	10.9.76.76/32	10.9.76.76 – 10.9.76.76	10.9.76.76
78	10.9.76.77/32	10.9.76.77 – 10.9.76.77	10.9.76.77
79	10.9.76.78/32	10.9.76.78 – 10.9.76.78	10.9.76.78
80	10.9.76.79/32	10.9.76.79 – 10.9.76.79	10.9.76.79
81	10.9.76.80/32	10.9.76.80 – 10.9.76.80	10.9.76.80
82	10.9.76.81/32	10.9.76.81 – 10.9.76.81	10.9.76.81
83	10.9.76.82/32	10.9.76.82 – 10.9.76.82	10.9.76.82
84	10.9.76.83/32	10.9.76.83 – 10.9.76.83	10.9.76.83
85	10.9.76.84/32	10.9.76.84 – 10.9.76.84	10.9.76.84
86	10.9.76.85/32	10.9.76.85 – 10.9.76.85	10.9.76.85
87	10.9.76.86/32	10.9.76.86 – 10.9.76.86	10.9.76.86
88	10.9.76.87/32	10.9.76.87 – 10.9.76.87	10.9.76.87
89	10.9.76.88/32	10.9.76.88 – 10.9.76.88	10.9.76.88
90	10.9.76.89/32	10.9.76.89 – 10.9.76.89	10.9.76.89
91	10.9.76.90/32	10.9.76.90 – 10.9.76.90	10.9.76.90
92	10.9.76.91/32	10.9.76.91 – 10.9.76.91	10.9.76.91
93	10.9.76.92/32	10.9.76.92 – 10.9.76.92	10.9.76.92
94	10.9.76.93/32	10.9.76.93 – 10.9.76.93	10.9.76.93
95	10.9.76.94/32	10.9.76.94 – 10.9.76.94	10.9.76.94
96	10.9.76.95/32	10.9.76.95 – 10.9.76.95	10.9.76.95
97	10.9.76.96/32	10.9.76.96 – 10.9.76.96	10.9.76.96
98	10.9.76.97/32	10.9.76.97 – 10.9.76.97	10.9.76.97
99	10.9.76.98/32	10.9.76.98 – 10.9.76.98	10.9.76.98
100	10.9.76.99/32	10.9.76.99 – 10.9.76.99	10.9.76.99
101	10.9.76.100/32	10.9.76.100 – 10.9.76.100	10.9.76.100
102	10.9.76.101/32	10.9.76.101 – 10.9.76.101	10.9.76.101
103	10.9.76.102/32	10.9.76.102 – 10.9.76.102	10.9.76.102
104	10.9.76.103/32	10.9.76.103 – 10.9.76.103	10.9.76.103
105	10.9.76.104/32	10.9.76.104 – 10.9.76.104	10.9.76.104
106	10.9.76.105/32	10.9.76.105 – 10.9.76.105	10.9.76.105
107	10.9.76.106/32	10.9.76.106 – 10.9.76.106	10.9.76.106
108	10.9.76.107/32	10.9.76.107 – 10.9.76.107	10.9.76.107
109	10.9.76.108/32	10.9.76.108 – 10.9.76.108	10.9.76.108
110	10.9.76.109/32	10.9.76.109 – 10.9.76.109	10.9.76.109
111	10.9.76.110/32	10.9.76.110 – 10.9.76.110	10.9.76.110
112	10.9.76.111/32	10.9.76.111 – 10.9.76.111	10.9.76.111
113	10.9.76.112/32	10.9.76.112 – 10.9.76.112	10.9.76.112
114	10.9.76.113/32	10.9.76.113 – 10.9.76.113	10.9.76.113
115	10.9.76.114/32	10.9.76.114 – 10.9.76.114	10.9.76.114
116	10.9.76.115/32	10.9.76.115 – 10.9.76.115	10.9.76.115
117	10.9.76.116/32	10.9.76.116 – 10.9.76.116	10.9.76.116
118	10.9.76.117/32	10.9.76.117 – 10.9.76.117	10.9.76.117
119	10.9.76.118/32	10.9.76.118 – 10.9.76.118	10.9.76.118
120	10.9.76.119/32	10.9.76.119 – 10.9.76.119	10.9.76.119
121	10.9.76.120/32	10.9.76.120 – 10.9.76.120	10.9.76.120
122	10.9.76.121/32	10.9.76.121 – 10.9.76.121	10.9.76.121
123	10.9.76.122/32	10.9.76.122 – 10.9.76.122	10.9.76.122
124	10.9.76.123/32	10.9.76.123 – 10.9.76.123	10.9.76.123
125	10.9.76.124/32	10.9.76.124 – 10.9.76.124	10.9.76.124
126	10.9.76.125/32	10.9.76.125 – 10.9.76.125	10.9.76.125
127	10.9.76.126/32	10.9.76.126 – 10.9.76.126	10.9.76.126
128	10.9.76.127/32	10.9.76.127 – 10.9.76.127	10.9.76.127

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 →