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)10.76.54.0/25

network10.76.54.0/25

broadcast10.76.54.127

first host10.76.54.1

last host10.76.54.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.76.54.0/25

address00001010.01001100.00110110.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.01001100.00110110.00000000

broadcast00001010.01001100.00110110.01111111

green = network part, grey = host part

hex0x0a4c3600

decimal172766720

reverse dns0.54.76.10.in-addr.arpa

ipv4-mapped::ffff:a4c:3600

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.76.54.0/32	10.76.54.0 – 10.76.54.0	10.76.54.0
2	10.76.54.1/32	10.76.54.1 – 10.76.54.1	10.76.54.1
3	10.76.54.2/32	10.76.54.2 – 10.76.54.2	10.76.54.2
4	10.76.54.3/32	10.76.54.3 – 10.76.54.3	10.76.54.3
5	10.76.54.4/32	10.76.54.4 – 10.76.54.4	10.76.54.4
6	10.76.54.5/32	10.76.54.5 – 10.76.54.5	10.76.54.5
7	10.76.54.6/32	10.76.54.6 – 10.76.54.6	10.76.54.6
8	10.76.54.7/32	10.76.54.7 – 10.76.54.7	10.76.54.7
9	10.76.54.8/32	10.76.54.8 – 10.76.54.8	10.76.54.8
10	10.76.54.9/32	10.76.54.9 – 10.76.54.9	10.76.54.9
11	10.76.54.10/32	10.76.54.10 – 10.76.54.10	10.76.54.10
12	10.76.54.11/32	10.76.54.11 – 10.76.54.11	10.76.54.11
13	10.76.54.12/32	10.76.54.12 – 10.76.54.12	10.76.54.12
14	10.76.54.13/32	10.76.54.13 – 10.76.54.13	10.76.54.13
15	10.76.54.14/32	10.76.54.14 – 10.76.54.14	10.76.54.14
16	10.76.54.15/32	10.76.54.15 – 10.76.54.15	10.76.54.15
17	10.76.54.16/32	10.76.54.16 – 10.76.54.16	10.76.54.16
18	10.76.54.17/32	10.76.54.17 – 10.76.54.17	10.76.54.17
19	10.76.54.18/32	10.76.54.18 – 10.76.54.18	10.76.54.18
20	10.76.54.19/32	10.76.54.19 – 10.76.54.19	10.76.54.19
21	10.76.54.20/32	10.76.54.20 – 10.76.54.20	10.76.54.20
22	10.76.54.21/32	10.76.54.21 – 10.76.54.21	10.76.54.21
23	10.76.54.22/32	10.76.54.22 – 10.76.54.22	10.76.54.22
24	10.76.54.23/32	10.76.54.23 – 10.76.54.23	10.76.54.23
25	10.76.54.24/32	10.76.54.24 – 10.76.54.24	10.76.54.24
26	10.76.54.25/32	10.76.54.25 – 10.76.54.25	10.76.54.25
27	10.76.54.26/32	10.76.54.26 – 10.76.54.26	10.76.54.26
28	10.76.54.27/32	10.76.54.27 – 10.76.54.27	10.76.54.27
29	10.76.54.28/32	10.76.54.28 – 10.76.54.28	10.76.54.28
30	10.76.54.29/32	10.76.54.29 – 10.76.54.29	10.76.54.29
31	10.76.54.30/32	10.76.54.30 – 10.76.54.30	10.76.54.30
32	10.76.54.31/32	10.76.54.31 – 10.76.54.31	10.76.54.31
33	10.76.54.32/32	10.76.54.32 – 10.76.54.32	10.76.54.32
34	10.76.54.33/32	10.76.54.33 – 10.76.54.33	10.76.54.33
35	10.76.54.34/32	10.76.54.34 – 10.76.54.34	10.76.54.34
36	10.76.54.35/32	10.76.54.35 – 10.76.54.35	10.76.54.35
37	10.76.54.36/32	10.76.54.36 – 10.76.54.36	10.76.54.36
38	10.76.54.37/32	10.76.54.37 – 10.76.54.37	10.76.54.37
39	10.76.54.38/32	10.76.54.38 – 10.76.54.38	10.76.54.38
40	10.76.54.39/32	10.76.54.39 – 10.76.54.39	10.76.54.39
41	10.76.54.40/32	10.76.54.40 – 10.76.54.40	10.76.54.40
42	10.76.54.41/32	10.76.54.41 – 10.76.54.41	10.76.54.41
43	10.76.54.42/32	10.76.54.42 – 10.76.54.42	10.76.54.42
44	10.76.54.43/32	10.76.54.43 – 10.76.54.43	10.76.54.43
45	10.76.54.44/32	10.76.54.44 – 10.76.54.44	10.76.54.44
46	10.76.54.45/32	10.76.54.45 – 10.76.54.45	10.76.54.45
47	10.76.54.46/32	10.76.54.46 – 10.76.54.46	10.76.54.46
48	10.76.54.47/32	10.76.54.47 – 10.76.54.47	10.76.54.47
49	10.76.54.48/32	10.76.54.48 – 10.76.54.48	10.76.54.48
50	10.76.54.49/32	10.76.54.49 – 10.76.54.49	10.76.54.49
51	10.76.54.50/32	10.76.54.50 – 10.76.54.50	10.76.54.50
52	10.76.54.51/32	10.76.54.51 – 10.76.54.51	10.76.54.51
53	10.76.54.52/32	10.76.54.52 – 10.76.54.52	10.76.54.52
54	10.76.54.53/32	10.76.54.53 – 10.76.54.53	10.76.54.53
55	10.76.54.54/32	10.76.54.54 – 10.76.54.54	10.76.54.54
56	10.76.54.55/32	10.76.54.55 – 10.76.54.55	10.76.54.55
57	10.76.54.56/32	10.76.54.56 – 10.76.54.56	10.76.54.56
58	10.76.54.57/32	10.76.54.57 – 10.76.54.57	10.76.54.57
59	10.76.54.58/32	10.76.54.58 – 10.76.54.58	10.76.54.58
60	10.76.54.59/32	10.76.54.59 – 10.76.54.59	10.76.54.59
61	10.76.54.60/32	10.76.54.60 – 10.76.54.60	10.76.54.60
62	10.76.54.61/32	10.76.54.61 – 10.76.54.61	10.76.54.61
63	10.76.54.62/32	10.76.54.62 – 10.76.54.62	10.76.54.62
64	10.76.54.63/32	10.76.54.63 – 10.76.54.63	10.76.54.63
65	10.76.54.64/32	10.76.54.64 – 10.76.54.64	10.76.54.64
66	10.76.54.65/32	10.76.54.65 – 10.76.54.65	10.76.54.65
67	10.76.54.66/32	10.76.54.66 – 10.76.54.66	10.76.54.66
68	10.76.54.67/32	10.76.54.67 – 10.76.54.67	10.76.54.67
69	10.76.54.68/32	10.76.54.68 – 10.76.54.68	10.76.54.68
70	10.76.54.69/32	10.76.54.69 – 10.76.54.69	10.76.54.69
71	10.76.54.70/32	10.76.54.70 – 10.76.54.70	10.76.54.70
72	10.76.54.71/32	10.76.54.71 – 10.76.54.71	10.76.54.71
73	10.76.54.72/32	10.76.54.72 – 10.76.54.72	10.76.54.72
74	10.76.54.73/32	10.76.54.73 – 10.76.54.73	10.76.54.73
75	10.76.54.74/32	10.76.54.74 – 10.76.54.74	10.76.54.74
76	10.76.54.75/32	10.76.54.75 – 10.76.54.75	10.76.54.75
77	10.76.54.76/32	10.76.54.76 – 10.76.54.76	10.76.54.76
78	10.76.54.77/32	10.76.54.77 – 10.76.54.77	10.76.54.77
79	10.76.54.78/32	10.76.54.78 – 10.76.54.78	10.76.54.78
80	10.76.54.79/32	10.76.54.79 – 10.76.54.79	10.76.54.79
81	10.76.54.80/32	10.76.54.80 – 10.76.54.80	10.76.54.80
82	10.76.54.81/32	10.76.54.81 – 10.76.54.81	10.76.54.81
83	10.76.54.82/32	10.76.54.82 – 10.76.54.82	10.76.54.82
84	10.76.54.83/32	10.76.54.83 – 10.76.54.83	10.76.54.83
85	10.76.54.84/32	10.76.54.84 – 10.76.54.84	10.76.54.84
86	10.76.54.85/32	10.76.54.85 – 10.76.54.85	10.76.54.85
87	10.76.54.86/32	10.76.54.86 – 10.76.54.86	10.76.54.86
88	10.76.54.87/32	10.76.54.87 – 10.76.54.87	10.76.54.87
89	10.76.54.88/32	10.76.54.88 – 10.76.54.88	10.76.54.88
90	10.76.54.89/32	10.76.54.89 – 10.76.54.89	10.76.54.89
91	10.76.54.90/32	10.76.54.90 – 10.76.54.90	10.76.54.90
92	10.76.54.91/32	10.76.54.91 – 10.76.54.91	10.76.54.91
93	10.76.54.92/32	10.76.54.92 – 10.76.54.92	10.76.54.92
94	10.76.54.93/32	10.76.54.93 – 10.76.54.93	10.76.54.93
95	10.76.54.94/32	10.76.54.94 – 10.76.54.94	10.76.54.94
96	10.76.54.95/32	10.76.54.95 – 10.76.54.95	10.76.54.95
97	10.76.54.96/32	10.76.54.96 – 10.76.54.96	10.76.54.96
98	10.76.54.97/32	10.76.54.97 – 10.76.54.97	10.76.54.97
99	10.76.54.98/32	10.76.54.98 – 10.76.54.98	10.76.54.98
100	10.76.54.99/32	10.76.54.99 – 10.76.54.99	10.76.54.99
101	10.76.54.100/32	10.76.54.100 – 10.76.54.100	10.76.54.100
102	10.76.54.101/32	10.76.54.101 – 10.76.54.101	10.76.54.101
103	10.76.54.102/32	10.76.54.102 – 10.76.54.102	10.76.54.102
104	10.76.54.103/32	10.76.54.103 – 10.76.54.103	10.76.54.103
105	10.76.54.104/32	10.76.54.104 – 10.76.54.104	10.76.54.104
106	10.76.54.105/32	10.76.54.105 – 10.76.54.105	10.76.54.105
107	10.76.54.106/32	10.76.54.106 – 10.76.54.106	10.76.54.106
108	10.76.54.107/32	10.76.54.107 – 10.76.54.107	10.76.54.107
109	10.76.54.108/32	10.76.54.108 – 10.76.54.108	10.76.54.108
110	10.76.54.109/32	10.76.54.109 – 10.76.54.109	10.76.54.109
111	10.76.54.110/32	10.76.54.110 – 10.76.54.110	10.76.54.110
112	10.76.54.111/32	10.76.54.111 – 10.76.54.111	10.76.54.111
113	10.76.54.112/32	10.76.54.112 – 10.76.54.112	10.76.54.112
114	10.76.54.113/32	10.76.54.113 – 10.76.54.113	10.76.54.113
115	10.76.54.114/32	10.76.54.114 – 10.76.54.114	10.76.54.114
116	10.76.54.115/32	10.76.54.115 – 10.76.54.115	10.76.54.115
117	10.76.54.116/32	10.76.54.116 – 10.76.54.116	10.76.54.116
118	10.76.54.117/32	10.76.54.117 – 10.76.54.117	10.76.54.117
119	10.76.54.118/32	10.76.54.118 – 10.76.54.118	10.76.54.118
120	10.76.54.119/32	10.76.54.119 – 10.76.54.119	10.76.54.119
121	10.76.54.120/32	10.76.54.120 – 10.76.54.120	10.76.54.120
122	10.76.54.121/32	10.76.54.121 – 10.76.54.121	10.76.54.121
123	10.76.54.122/32	10.76.54.122 – 10.76.54.122	10.76.54.122
124	10.76.54.123/32	10.76.54.123 – 10.76.54.123	10.76.54.123
125	10.76.54.124/32	10.76.54.124 – 10.76.54.124	10.76.54.124
126	10.76.54.125/32	10.76.54.125 – 10.76.54.125	10.76.54.125
127	10.76.54.126/32	10.76.54.126 – 10.76.54.126	10.76.54.126
128	10.76.54.127/32	10.76.54.127 – 10.76.54.127	10.76.54.127

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 →