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)10.9.80.0/25

network10.9.80.0/25

broadcast10.9.80.127

first host10.9.80.1

last host10.9.80.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.9.80.0/25

address00001010.00001001.01010000.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00001001.01010000.00000000

broadcast00001010.00001001.01010000.01111111

green = network part, grey = host part

hex0x0a095000

decimal168382464

reverse dns0.80.9.10.in-addr.arpa

ipv4-mapped::ffff:a09:5000

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.9.80.0/32	10.9.80.0 – 10.9.80.0	10.9.80.0
2	10.9.80.1/32	10.9.80.1 – 10.9.80.1	10.9.80.1
3	10.9.80.2/32	10.9.80.2 – 10.9.80.2	10.9.80.2
4	10.9.80.3/32	10.9.80.3 – 10.9.80.3	10.9.80.3
5	10.9.80.4/32	10.9.80.4 – 10.9.80.4	10.9.80.4
6	10.9.80.5/32	10.9.80.5 – 10.9.80.5	10.9.80.5
7	10.9.80.6/32	10.9.80.6 – 10.9.80.6	10.9.80.6
8	10.9.80.7/32	10.9.80.7 – 10.9.80.7	10.9.80.7
9	10.9.80.8/32	10.9.80.8 – 10.9.80.8	10.9.80.8
10	10.9.80.9/32	10.9.80.9 – 10.9.80.9	10.9.80.9
11	10.9.80.10/32	10.9.80.10 – 10.9.80.10	10.9.80.10
12	10.9.80.11/32	10.9.80.11 – 10.9.80.11	10.9.80.11
13	10.9.80.12/32	10.9.80.12 – 10.9.80.12	10.9.80.12
14	10.9.80.13/32	10.9.80.13 – 10.9.80.13	10.9.80.13
15	10.9.80.14/32	10.9.80.14 – 10.9.80.14	10.9.80.14
16	10.9.80.15/32	10.9.80.15 – 10.9.80.15	10.9.80.15
17	10.9.80.16/32	10.9.80.16 – 10.9.80.16	10.9.80.16
18	10.9.80.17/32	10.9.80.17 – 10.9.80.17	10.9.80.17
19	10.9.80.18/32	10.9.80.18 – 10.9.80.18	10.9.80.18
20	10.9.80.19/32	10.9.80.19 – 10.9.80.19	10.9.80.19
21	10.9.80.20/32	10.9.80.20 – 10.9.80.20	10.9.80.20
22	10.9.80.21/32	10.9.80.21 – 10.9.80.21	10.9.80.21
23	10.9.80.22/32	10.9.80.22 – 10.9.80.22	10.9.80.22
24	10.9.80.23/32	10.9.80.23 – 10.9.80.23	10.9.80.23
25	10.9.80.24/32	10.9.80.24 – 10.9.80.24	10.9.80.24
26	10.9.80.25/32	10.9.80.25 – 10.9.80.25	10.9.80.25
27	10.9.80.26/32	10.9.80.26 – 10.9.80.26	10.9.80.26
28	10.9.80.27/32	10.9.80.27 – 10.9.80.27	10.9.80.27
29	10.9.80.28/32	10.9.80.28 – 10.9.80.28	10.9.80.28
30	10.9.80.29/32	10.9.80.29 – 10.9.80.29	10.9.80.29
31	10.9.80.30/32	10.9.80.30 – 10.9.80.30	10.9.80.30
32	10.9.80.31/32	10.9.80.31 – 10.9.80.31	10.9.80.31
33	10.9.80.32/32	10.9.80.32 – 10.9.80.32	10.9.80.32
34	10.9.80.33/32	10.9.80.33 – 10.9.80.33	10.9.80.33
35	10.9.80.34/32	10.9.80.34 – 10.9.80.34	10.9.80.34
36	10.9.80.35/32	10.9.80.35 – 10.9.80.35	10.9.80.35
37	10.9.80.36/32	10.9.80.36 – 10.9.80.36	10.9.80.36
38	10.9.80.37/32	10.9.80.37 – 10.9.80.37	10.9.80.37
39	10.9.80.38/32	10.9.80.38 – 10.9.80.38	10.9.80.38
40	10.9.80.39/32	10.9.80.39 – 10.9.80.39	10.9.80.39
41	10.9.80.40/32	10.9.80.40 – 10.9.80.40	10.9.80.40
42	10.9.80.41/32	10.9.80.41 – 10.9.80.41	10.9.80.41
43	10.9.80.42/32	10.9.80.42 – 10.9.80.42	10.9.80.42
44	10.9.80.43/32	10.9.80.43 – 10.9.80.43	10.9.80.43
45	10.9.80.44/32	10.9.80.44 – 10.9.80.44	10.9.80.44
46	10.9.80.45/32	10.9.80.45 – 10.9.80.45	10.9.80.45
47	10.9.80.46/32	10.9.80.46 – 10.9.80.46	10.9.80.46
48	10.9.80.47/32	10.9.80.47 – 10.9.80.47	10.9.80.47
49	10.9.80.48/32	10.9.80.48 – 10.9.80.48	10.9.80.48
50	10.9.80.49/32	10.9.80.49 – 10.9.80.49	10.9.80.49
51	10.9.80.50/32	10.9.80.50 – 10.9.80.50	10.9.80.50
52	10.9.80.51/32	10.9.80.51 – 10.9.80.51	10.9.80.51
53	10.9.80.52/32	10.9.80.52 – 10.9.80.52	10.9.80.52
54	10.9.80.53/32	10.9.80.53 – 10.9.80.53	10.9.80.53
55	10.9.80.54/32	10.9.80.54 – 10.9.80.54	10.9.80.54
56	10.9.80.55/32	10.9.80.55 – 10.9.80.55	10.9.80.55
57	10.9.80.56/32	10.9.80.56 – 10.9.80.56	10.9.80.56
58	10.9.80.57/32	10.9.80.57 – 10.9.80.57	10.9.80.57
59	10.9.80.58/32	10.9.80.58 – 10.9.80.58	10.9.80.58
60	10.9.80.59/32	10.9.80.59 – 10.9.80.59	10.9.80.59
61	10.9.80.60/32	10.9.80.60 – 10.9.80.60	10.9.80.60
62	10.9.80.61/32	10.9.80.61 – 10.9.80.61	10.9.80.61
63	10.9.80.62/32	10.9.80.62 – 10.9.80.62	10.9.80.62
64	10.9.80.63/32	10.9.80.63 – 10.9.80.63	10.9.80.63
65	10.9.80.64/32	10.9.80.64 – 10.9.80.64	10.9.80.64
66	10.9.80.65/32	10.9.80.65 – 10.9.80.65	10.9.80.65
67	10.9.80.66/32	10.9.80.66 – 10.9.80.66	10.9.80.66
68	10.9.80.67/32	10.9.80.67 – 10.9.80.67	10.9.80.67
69	10.9.80.68/32	10.9.80.68 – 10.9.80.68	10.9.80.68
70	10.9.80.69/32	10.9.80.69 – 10.9.80.69	10.9.80.69
71	10.9.80.70/32	10.9.80.70 – 10.9.80.70	10.9.80.70
72	10.9.80.71/32	10.9.80.71 – 10.9.80.71	10.9.80.71
73	10.9.80.72/32	10.9.80.72 – 10.9.80.72	10.9.80.72
74	10.9.80.73/32	10.9.80.73 – 10.9.80.73	10.9.80.73
75	10.9.80.74/32	10.9.80.74 – 10.9.80.74	10.9.80.74
76	10.9.80.75/32	10.9.80.75 – 10.9.80.75	10.9.80.75
77	10.9.80.76/32	10.9.80.76 – 10.9.80.76	10.9.80.76
78	10.9.80.77/32	10.9.80.77 – 10.9.80.77	10.9.80.77
79	10.9.80.78/32	10.9.80.78 – 10.9.80.78	10.9.80.78
80	10.9.80.79/32	10.9.80.79 – 10.9.80.79	10.9.80.79
81	10.9.80.80/32	10.9.80.80 – 10.9.80.80	10.9.80.80
82	10.9.80.81/32	10.9.80.81 – 10.9.80.81	10.9.80.81
83	10.9.80.82/32	10.9.80.82 – 10.9.80.82	10.9.80.82
84	10.9.80.83/32	10.9.80.83 – 10.9.80.83	10.9.80.83
85	10.9.80.84/32	10.9.80.84 – 10.9.80.84	10.9.80.84
86	10.9.80.85/32	10.9.80.85 – 10.9.80.85	10.9.80.85
87	10.9.80.86/32	10.9.80.86 – 10.9.80.86	10.9.80.86
88	10.9.80.87/32	10.9.80.87 – 10.9.80.87	10.9.80.87
89	10.9.80.88/32	10.9.80.88 – 10.9.80.88	10.9.80.88
90	10.9.80.89/32	10.9.80.89 – 10.9.80.89	10.9.80.89
91	10.9.80.90/32	10.9.80.90 – 10.9.80.90	10.9.80.90
92	10.9.80.91/32	10.9.80.91 – 10.9.80.91	10.9.80.91
93	10.9.80.92/32	10.9.80.92 – 10.9.80.92	10.9.80.92
94	10.9.80.93/32	10.9.80.93 – 10.9.80.93	10.9.80.93
95	10.9.80.94/32	10.9.80.94 – 10.9.80.94	10.9.80.94
96	10.9.80.95/32	10.9.80.95 – 10.9.80.95	10.9.80.95
97	10.9.80.96/32	10.9.80.96 – 10.9.80.96	10.9.80.96
98	10.9.80.97/32	10.9.80.97 – 10.9.80.97	10.9.80.97
99	10.9.80.98/32	10.9.80.98 – 10.9.80.98	10.9.80.98
100	10.9.80.99/32	10.9.80.99 – 10.9.80.99	10.9.80.99
101	10.9.80.100/32	10.9.80.100 – 10.9.80.100	10.9.80.100
102	10.9.80.101/32	10.9.80.101 – 10.9.80.101	10.9.80.101
103	10.9.80.102/32	10.9.80.102 – 10.9.80.102	10.9.80.102
104	10.9.80.103/32	10.9.80.103 – 10.9.80.103	10.9.80.103
105	10.9.80.104/32	10.9.80.104 – 10.9.80.104	10.9.80.104
106	10.9.80.105/32	10.9.80.105 – 10.9.80.105	10.9.80.105
107	10.9.80.106/32	10.9.80.106 – 10.9.80.106	10.9.80.106
108	10.9.80.107/32	10.9.80.107 – 10.9.80.107	10.9.80.107
109	10.9.80.108/32	10.9.80.108 – 10.9.80.108	10.9.80.108
110	10.9.80.109/32	10.9.80.109 – 10.9.80.109	10.9.80.109
111	10.9.80.110/32	10.9.80.110 – 10.9.80.110	10.9.80.110
112	10.9.80.111/32	10.9.80.111 – 10.9.80.111	10.9.80.111
113	10.9.80.112/32	10.9.80.112 – 10.9.80.112	10.9.80.112
114	10.9.80.113/32	10.9.80.113 – 10.9.80.113	10.9.80.113
115	10.9.80.114/32	10.9.80.114 – 10.9.80.114	10.9.80.114
116	10.9.80.115/32	10.9.80.115 – 10.9.80.115	10.9.80.115
117	10.9.80.116/32	10.9.80.116 – 10.9.80.116	10.9.80.116
118	10.9.80.117/32	10.9.80.117 – 10.9.80.117	10.9.80.117
119	10.9.80.118/32	10.9.80.118 – 10.9.80.118	10.9.80.118
120	10.9.80.119/32	10.9.80.119 – 10.9.80.119	10.9.80.119
121	10.9.80.120/32	10.9.80.120 – 10.9.80.120	10.9.80.120
122	10.9.80.121/32	10.9.80.121 – 10.9.80.121	10.9.80.121
123	10.9.80.122/32	10.9.80.122 – 10.9.80.122	10.9.80.122
124	10.9.80.123/32	10.9.80.123 – 10.9.80.123	10.9.80.123
125	10.9.80.124/32	10.9.80.124 – 10.9.80.124	10.9.80.124
126	10.9.80.125/32	10.9.80.125 – 10.9.80.125	10.9.80.125
127	10.9.80.126/32	10.9.80.126 – 10.9.80.126	10.9.80.126
128	10.9.80.127/32	10.9.80.127 – 10.9.80.127	10.9.80.127

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 →