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)10.167.53.0/25

network10.167.53.0/25

broadcast10.167.53.127

first host10.167.53.1

last host10.167.53.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.53.0/25

address00001010.10100111.00110101.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.00110101.00000000

broadcast00001010.10100111.00110101.01111111

green = network part, grey = host part

hex0x0aa73500

decimal178730240

reverse dns0.53.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3500

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.53.0/32	10.167.53.0 – 10.167.53.0	10.167.53.0
2	10.167.53.1/32	10.167.53.1 – 10.167.53.1	10.167.53.1
3	10.167.53.2/32	10.167.53.2 – 10.167.53.2	10.167.53.2
4	10.167.53.3/32	10.167.53.3 – 10.167.53.3	10.167.53.3
5	10.167.53.4/32	10.167.53.4 – 10.167.53.4	10.167.53.4
6	10.167.53.5/32	10.167.53.5 – 10.167.53.5	10.167.53.5
7	10.167.53.6/32	10.167.53.6 – 10.167.53.6	10.167.53.6
8	10.167.53.7/32	10.167.53.7 – 10.167.53.7	10.167.53.7
9	10.167.53.8/32	10.167.53.8 – 10.167.53.8	10.167.53.8
10	10.167.53.9/32	10.167.53.9 – 10.167.53.9	10.167.53.9
11	10.167.53.10/32	10.167.53.10 – 10.167.53.10	10.167.53.10
12	10.167.53.11/32	10.167.53.11 – 10.167.53.11	10.167.53.11
13	10.167.53.12/32	10.167.53.12 – 10.167.53.12	10.167.53.12
14	10.167.53.13/32	10.167.53.13 – 10.167.53.13	10.167.53.13
15	10.167.53.14/32	10.167.53.14 – 10.167.53.14	10.167.53.14
16	10.167.53.15/32	10.167.53.15 – 10.167.53.15	10.167.53.15
17	10.167.53.16/32	10.167.53.16 – 10.167.53.16	10.167.53.16
18	10.167.53.17/32	10.167.53.17 – 10.167.53.17	10.167.53.17
19	10.167.53.18/32	10.167.53.18 – 10.167.53.18	10.167.53.18
20	10.167.53.19/32	10.167.53.19 – 10.167.53.19	10.167.53.19
21	10.167.53.20/32	10.167.53.20 – 10.167.53.20	10.167.53.20
22	10.167.53.21/32	10.167.53.21 – 10.167.53.21	10.167.53.21
23	10.167.53.22/32	10.167.53.22 – 10.167.53.22	10.167.53.22
24	10.167.53.23/32	10.167.53.23 – 10.167.53.23	10.167.53.23
25	10.167.53.24/32	10.167.53.24 – 10.167.53.24	10.167.53.24
26	10.167.53.25/32	10.167.53.25 – 10.167.53.25	10.167.53.25
27	10.167.53.26/32	10.167.53.26 – 10.167.53.26	10.167.53.26
28	10.167.53.27/32	10.167.53.27 – 10.167.53.27	10.167.53.27
29	10.167.53.28/32	10.167.53.28 – 10.167.53.28	10.167.53.28
30	10.167.53.29/32	10.167.53.29 – 10.167.53.29	10.167.53.29
31	10.167.53.30/32	10.167.53.30 – 10.167.53.30	10.167.53.30
32	10.167.53.31/32	10.167.53.31 – 10.167.53.31	10.167.53.31
33	10.167.53.32/32	10.167.53.32 – 10.167.53.32	10.167.53.32
34	10.167.53.33/32	10.167.53.33 – 10.167.53.33	10.167.53.33
35	10.167.53.34/32	10.167.53.34 – 10.167.53.34	10.167.53.34
36	10.167.53.35/32	10.167.53.35 – 10.167.53.35	10.167.53.35
37	10.167.53.36/32	10.167.53.36 – 10.167.53.36	10.167.53.36
38	10.167.53.37/32	10.167.53.37 – 10.167.53.37	10.167.53.37
39	10.167.53.38/32	10.167.53.38 – 10.167.53.38	10.167.53.38
40	10.167.53.39/32	10.167.53.39 – 10.167.53.39	10.167.53.39
41	10.167.53.40/32	10.167.53.40 – 10.167.53.40	10.167.53.40
42	10.167.53.41/32	10.167.53.41 – 10.167.53.41	10.167.53.41
43	10.167.53.42/32	10.167.53.42 – 10.167.53.42	10.167.53.42
44	10.167.53.43/32	10.167.53.43 – 10.167.53.43	10.167.53.43
45	10.167.53.44/32	10.167.53.44 – 10.167.53.44	10.167.53.44
46	10.167.53.45/32	10.167.53.45 – 10.167.53.45	10.167.53.45
47	10.167.53.46/32	10.167.53.46 – 10.167.53.46	10.167.53.46
48	10.167.53.47/32	10.167.53.47 – 10.167.53.47	10.167.53.47
49	10.167.53.48/32	10.167.53.48 – 10.167.53.48	10.167.53.48
50	10.167.53.49/32	10.167.53.49 – 10.167.53.49	10.167.53.49
51	10.167.53.50/32	10.167.53.50 – 10.167.53.50	10.167.53.50
52	10.167.53.51/32	10.167.53.51 – 10.167.53.51	10.167.53.51
53	10.167.53.52/32	10.167.53.52 – 10.167.53.52	10.167.53.52
54	10.167.53.53/32	10.167.53.53 – 10.167.53.53	10.167.53.53
55	10.167.53.54/32	10.167.53.54 – 10.167.53.54	10.167.53.54
56	10.167.53.55/32	10.167.53.55 – 10.167.53.55	10.167.53.55
57	10.167.53.56/32	10.167.53.56 – 10.167.53.56	10.167.53.56
58	10.167.53.57/32	10.167.53.57 – 10.167.53.57	10.167.53.57
59	10.167.53.58/32	10.167.53.58 – 10.167.53.58	10.167.53.58
60	10.167.53.59/32	10.167.53.59 – 10.167.53.59	10.167.53.59
61	10.167.53.60/32	10.167.53.60 – 10.167.53.60	10.167.53.60
62	10.167.53.61/32	10.167.53.61 – 10.167.53.61	10.167.53.61
63	10.167.53.62/32	10.167.53.62 – 10.167.53.62	10.167.53.62
64	10.167.53.63/32	10.167.53.63 – 10.167.53.63	10.167.53.63
65	10.167.53.64/32	10.167.53.64 – 10.167.53.64	10.167.53.64
66	10.167.53.65/32	10.167.53.65 – 10.167.53.65	10.167.53.65
67	10.167.53.66/32	10.167.53.66 – 10.167.53.66	10.167.53.66
68	10.167.53.67/32	10.167.53.67 – 10.167.53.67	10.167.53.67
69	10.167.53.68/32	10.167.53.68 – 10.167.53.68	10.167.53.68
70	10.167.53.69/32	10.167.53.69 – 10.167.53.69	10.167.53.69
71	10.167.53.70/32	10.167.53.70 – 10.167.53.70	10.167.53.70
72	10.167.53.71/32	10.167.53.71 – 10.167.53.71	10.167.53.71
73	10.167.53.72/32	10.167.53.72 – 10.167.53.72	10.167.53.72
74	10.167.53.73/32	10.167.53.73 – 10.167.53.73	10.167.53.73
75	10.167.53.74/32	10.167.53.74 – 10.167.53.74	10.167.53.74
76	10.167.53.75/32	10.167.53.75 – 10.167.53.75	10.167.53.75
77	10.167.53.76/32	10.167.53.76 – 10.167.53.76	10.167.53.76
78	10.167.53.77/32	10.167.53.77 – 10.167.53.77	10.167.53.77
79	10.167.53.78/32	10.167.53.78 – 10.167.53.78	10.167.53.78
80	10.167.53.79/32	10.167.53.79 – 10.167.53.79	10.167.53.79
81	10.167.53.80/32	10.167.53.80 – 10.167.53.80	10.167.53.80
82	10.167.53.81/32	10.167.53.81 – 10.167.53.81	10.167.53.81
83	10.167.53.82/32	10.167.53.82 – 10.167.53.82	10.167.53.82
84	10.167.53.83/32	10.167.53.83 – 10.167.53.83	10.167.53.83
85	10.167.53.84/32	10.167.53.84 – 10.167.53.84	10.167.53.84
86	10.167.53.85/32	10.167.53.85 – 10.167.53.85	10.167.53.85
87	10.167.53.86/32	10.167.53.86 – 10.167.53.86	10.167.53.86
88	10.167.53.87/32	10.167.53.87 – 10.167.53.87	10.167.53.87
89	10.167.53.88/32	10.167.53.88 – 10.167.53.88	10.167.53.88
90	10.167.53.89/32	10.167.53.89 – 10.167.53.89	10.167.53.89
91	10.167.53.90/32	10.167.53.90 – 10.167.53.90	10.167.53.90
92	10.167.53.91/32	10.167.53.91 – 10.167.53.91	10.167.53.91
93	10.167.53.92/32	10.167.53.92 – 10.167.53.92	10.167.53.92
94	10.167.53.93/32	10.167.53.93 – 10.167.53.93	10.167.53.93
95	10.167.53.94/32	10.167.53.94 – 10.167.53.94	10.167.53.94
96	10.167.53.95/32	10.167.53.95 – 10.167.53.95	10.167.53.95
97	10.167.53.96/32	10.167.53.96 – 10.167.53.96	10.167.53.96
98	10.167.53.97/32	10.167.53.97 – 10.167.53.97	10.167.53.97
99	10.167.53.98/32	10.167.53.98 – 10.167.53.98	10.167.53.98
100	10.167.53.99/32	10.167.53.99 – 10.167.53.99	10.167.53.99
101	10.167.53.100/32	10.167.53.100 – 10.167.53.100	10.167.53.100
102	10.167.53.101/32	10.167.53.101 – 10.167.53.101	10.167.53.101
103	10.167.53.102/32	10.167.53.102 – 10.167.53.102	10.167.53.102
104	10.167.53.103/32	10.167.53.103 – 10.167.53.103	10.167.53.103
105	10.167.53.104/32	10.167.53.104 – 10.167.53.104	10.167.53.104
106	10.167.53.105/32	10.167.53.105 – 10.167.53.105	10.167.53.105
107	10.167.53.106/32	10.167.53.106 – 10.167.53.106	10.167.53.106
108	10.167.53.107/32	10.167.53.107 – 10.167.53.107	10.167.53.107
109	10.167.53.108/32	10.167.53.108 – 10.167.53.108	10.167.53.108
110	10.167.53.109/32	10.167.53.109 – 10.167.53.109	10.167.53.109
111	10.167.53.110/32	10.167.53.110 – 10.167.53.110	10.167.53.110
112	10.167.53.111/32	10.167.53.111 – 10.167.53.111	10.167.53.111
113	10.167.53.112/32	10.167.53.112 – 10.167.53.112	10.167.53.112
114	10.167.53.113/32	10.167.53.113 – 10.167.53.113	10.167.53.113
115	10.167.53.114/32	10.167.53.114 – 10.167.53.114	10.167.53.114
116	10.167.53.115/32	10.167.53.115 – 10.167.53.115	10.167.53.115
117	10.167.53.116/32	10.167.53.116 – 10.167.53.116	10.167.53.116
118	10.167.53.117/32	10.167.53.117 – 10.167.53.117	10.167.53.117
119	10.167.53.118/32	10.167.53.118 – 10.167.53.118	10.167.53.118
120	10.167.53.119/32	10.167.53.119 – 10.167.53.119	10.167.53.119
121	10.167.53.120/32	10.167.53.120 – 10.167.53.120	10.167.53.120
122	10.167.53.121/32	10.167.53.121 – 10.167.53.121	10.167.53.121
123	10.167.53.122/32	10.167.53.122 – 10.167.53.122	10.167.53.122
124	10.167.53.123/32	10.167.53.123 – 10.167.53.123	10.167.53.123
125	10.167.53.124/32	10.167.53.124 – 10.167.53.124	10.167.53.124
126	10.167.53.125/32	10.167.53.125 – 10.167.53.125	10.167.53.125
127	10.167.53.126/32	10.167.53.126 – 10.167.53.126	10.167.53.126
128	10.167.53.127/32	10.167.53.127 – 10.167.53.127	10.167.53.127

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 →