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)10.232.59.0/25

network10.232.59.0/25

broadcast10.232.59.127

first host10.232.59.1

last host10.232.59.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.232.59.0/25

address00001010.11101000.00111011.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.11101000.00111011.00000000

broadcast00001010.11101000.00111011.01111111

green = network part, grey = host part

hex0x0ae83b00

decimal182991616

reverse dns0.59.232.10.in-addr.arpa

ipv4-mapped::ffff:ae8:3b00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.232.59.0/32	10.232.59.0 – 10.232.59.0	10.232.59.0
2	10.232.59.1/32	10.232.59.1 – 10.232.59.1	10.232.59.1
3	10.232.59.2/32	10.232.59.2 – 10.232.59.2	10.232.59.2
4	10.232.59.3/32	10.232.59.3 – 10.232.59.3	10.232.59.3
5	10.232.59.4/32	10.232.59.4 – 10.232.59.4	10.232.59.4
6	10.232.59.5/32	10.232.59.5 – 10.232.59.5	10.232.59.5
7	10.232.59.6/32	10.232.59.6 – 10.232.59.6	10.232.59.6
8	10.232.59.7/32	10.232.59.7 – 10.232.59.7	10.232.59.7
9	10.232.59.8/32	10.232.59.8 – 10.232.59.8	10.232.59.8
10	10.232.59.9/32	10.232.59.9 – 10.232.59.9	10.232.59.9
11	10.232.59.10/32	10.232.59.10 – 10.232.59.10	10.232.59.10
12	10.232.59.11/32	10.232.59.11 – 10.232.59.11	10.232.59.11
13	10.232.59.12/32	10.232.59.12 – 10.232.59.12	10.232.59.12
14	10.232.59.13/32	10.232.59.13 – 10.232.59.13	10.232.59.13
15	10.232.59.14/32	10.232.59.14 – 10.232.59.14	10.232.59.14
16	10.232.59.15/32	10.232.59.15 – 10.232.59.15	10.232.59.15
17	10.232.59.16/32	10.232.59.16 – 10.232.59.16	10.232.59.16
18	10.232.59.17/32	10.232.59.17 – 10.232.59.17	10.232.59.17
19	10.232.59.18/32	10.232.59.18 – 10.232.59.18	10.232.59.18
20	10.232.59.19/32	10.232.59.19 – 10.232.59.19	10.232.59.19
21	10.232.59.20/32	10.232.59.20 – 10.232.59.20	10.232.59.20
22	10.232.59.21/32	10.232.59.21 – 10.232.59.21	10.232.59.21
23	10.232.59.22/32	10.232.59.22 – 10.232.59.22	10.232.59.22
24	10.232.59.23/32	10.232.59.23 – 10.232.59.23	10.232.59.23
25	10.232.59.24/32	10.232.59.24 – 10.232.59.24	10.232.59.24
26	10.232.59.25/32	10.232.59.25 – 10.232.59.25	10.232.59.25
27	10.232.59.26/32	10.232.59.26 – 10.232.59.26	10.232.59.26
28	10.232.59.27/32	10.232.59.27 – 10.232.59.27	10.232.59.27
29	10.232.59.28/32	10.232.59.28 – 10.232.59.28	10.232.59.28
30	10.232.59.29/32	10.232.59.29 – 10.232.59.29	10.232.59.29
31	10.232.59.30/32	10.232.59.30 – 10.232.59.30	10.232.59.30
32	10.232.59.31/32	10.232.59.31 – 10.232.59.31	10.232.59.31
33	10.232.59.32/32	10.232.59.32 – 10.232.59.32	10.232.59.32
34	10.232.59.33/32	10.232.59.33 – 10.232.59.33	10.232.59.33
35	10.232.59.34/32	10.232.59.34 – 10.232.59.34	10.232.59.34
36	10.232.59.35/32	10.232.59.35 – 10.232.59.35	10.232.59.35
37	10.232.59.36/32	10.232.59.36 – 10.232.59.36	10.232.59.36
38	10.232.59.37/32	10.232.59.37 – 10.232.59.37	10.232.59.37
39	10.232.59.38/32	10.232.59.38 – 10.232.59.38	10.232.59.38
40	10.232.59.39/32	10.232.59.39 – 10.232.59.39	10.232.59.39
41	10.232.59.40/32	10.232.59.40 – 10.232.59.40	10.232.59.40
42	10.232.59.41/32	10.232.59.41 – 10.232.59.41	10.232.59.41
43	10.232.59.42/32	10.232.59.42 – 10.232.59.42	10.232.59.42
44	10.232.59.43/32	10.232.59.43 – 10.232.59.43	10.232.59.43
45	10.232.59.44/32	10.232.59.44 – 10.232.59.44	10.232.59.44
46	10.232.59.45/32	10.232.59.45 – 10.232.59.45	10.232.59.45
47	10.232.59.46/32	10.232.59.46 – 10.232.59.46	10.232.59.46
48	10.232.59.47/32	10.232.59.47 – 10.232.59.47	10.232.59.47
49	10.232.59.48/32	10.232.59.48 – 10.232.59.48	10.232.59.48
50	10.232.59.49/32	10.232.59.49 – 10.232.59.49	10.232.59.49
51	10.232.59.50/32	10.232.59.50 – 10.232.59.50	10.232.59.50
52	10.232.59.51/32	10.232.59.51 – 10.232.59.51	10.232.59.51
53	10.232.59.52/32	10.232.59.52 – 10.232.59.52	10.232.59.52
54	10.232.59.53/32	10.232.59.53 – 10.232.59.53	10.232.59.53
55	10.232.59.54/32	10.232.59.54 – 10.232.59.54	10.232.59.54
56	10.232.59.55/32	10.232.59.55 – 10.232.59.55	10.232.59.55
57	10.232.59.56/32	10.232.59.56 – 10.232.59.56	10.232.59.56
58	10.232.59.57/32	10.232.59.57 – 10.232.59.57	10.232.59.57
59	10.232.59.58/32	10.232.59.58 – 10.232.59.58	10.232.59.58
60	10.232.59.59/32	10.232.59.59 – 10.232.59.59	10.232.59.59
61	10.232.59.60/32	10.232.59.60 – 10.232.59.60	10.232.59.60
62	10.232.59.61/32	10.232.59.61 – 10.232.59.61	10.232.59.61
63	10.232.59.62/32	10.232.59.62 – 10.232.59.62	10.232.59.62
64	10.232.59.63/32	10.232.59.63 – 10.232.59.63	10.232.59.63
65	10.232.59.64/32	10.232.59.64 – 10.232.59.64	10.232.59.64
66	10.232.59.65/32	10.232.59.65 – 10.232.59.65	10.232.59.65
67	10.232.59.66/32	10.232.59.66 – 10.232.59.66	10.232.59.66
68	10.232.59.67/32	10.232.59.67 – 10.232.59.67	10.232.59.67
69	10.232.59.68/32	10.232.59.68 – 10.232.59.68	10.232.59.68
70	10.232.59.69/32	10.232.59.69 – 10.232.59.69	10.232.59.69
71	10.232.59.70/32	10.232.59.70 – 10.232.59.70	10.232.59.70
72	10.232.59.71/32	10.232.59.71 – 10.232.59.71	10.232.59.71
73	10.232.59.72/32	10.232.59.72 – 10.232.59.72	10.232.59.72
74	10.232.59.73/32	10.232.59.73 – 10.232.59.73	10.232.59.73
75	10.232.59.74/32	10.232.59.74 – 10.232.59.74	10.232.59.74
76	10.232.59.75/32	10.232.59.75 – 10.232.59.75	10.232.59.75
77	10.232.59.76/32	10.232.59.76 – 10.232.59.76	10.232.59.76
78	10.232.59.77/32	10.232.59.77 – 10.232.59.77	10.232.59.77
79	10.232.59.78/32	10.232.59.78 – 10.232.59.78	10.232.59.78
80	10.232.59.79/32	10.232.59.79 – 10.232.59.79	10.232.59.79
81	10.232.59.80/32	10.232.59.80 – 10.232.59.80	10.232.59.80
82	10.232.59.81/32	10.232.59.81 – 10.232.59.81	10.232.59.81
83	10.232.59.82/32	10.232.59.82 – 10.232.59.82	10.232.59.82
84	10.232.59.83/32	10.232.59.83 – 10.232.59.83	10.232.59.83
85	10.232.59.84/32	10.232.59.84 – 10.232.59.84	10.232.59.84
86	10.232.59.85/32	10.232.59.85 – 10.232.59.85	10.232.59.85
87	10.232.59.86/32	10.232.59.86 – 10.232.59.86	10.232.59.86
88	10.232.59.87/32	10.232.59.87 – 10.232.59.87	10.232.59.87
89	10.232.59.88/32	10.232.59.88 – 10.232.59.88	10.232.59.88
90	10.232.59.89/32	10.232.59.89 – 10.232.59.89	10.232.59.89
91	10.232.59.90/32	10.232.59.90 – 10.232.59.90	10.232.59.90
92	10.232.59.91/32	10.232.59.91 – 10.232.59.91	10.232.59.91
93	10.232.59.92/32	10.232.59.92 – 10.232.59.92	10.232.59.92
94	10.232.59.93/32	10.232.59.93 – 10.232.59.93	10.232.59.93
95	10.232.59.94/32	10.232.59.94 – 10.232.59.94	10.232.59.94
96	10.232.59.95/32	10.232.59.95 – 10.232.59.95	10.232.59.95
97	10.232.59.96/32	10.232.59.96 – 10.232.59.96	10.232.59.96
98	10.232.59.97/32	10.232.59.97 – 10.232.59.97	10.232.59.97
99	10.232.59.98/32	10.232.59.98 – 10.232.59.98	10.232.59.98
100	10.232.59.99/32	10.232.59.99 – 10.232.59.99	10.232.59.99
101	10.232.59.100/32	10.232.59.100 – 10.232.59.100	10.232.59.100
102	10.232.59.101/32	10.232.59.101 – 10.232.59.101	10.232.59.101
103	10.232.59.102/32	10.232.59.102 – 10.232.59.102	10.232.59.102
104	10.232.59.103/32	10.232.59.103 – 10.232.59.103	10.232.59.103
105	10.232.59.104/32	10.232.59.104 – 10.232.59.104	10.232.59.104
106	10.232.59.105/32	10.232.59.105 – 10.232.59.105	10.232.59.105
107	10.232.59.106/32	10.232.59.106 – 10.232.59.106	10.232.59.106
108	10.232.59.107/32	10.232.59.107 – 10.232.59.107	10.232.59.107
109	10.232.59.108/32	10.232.59.108 – 10.232.59.108	10.232.59.108
110	10.232.59.109/32	10.232.59.109 – 10.232.59.109	10.232.59.109
111	10.232.59.110/32	10.232.59.110 – 10.232.59.110	10.232.59.110
112	10.232.59.111/32	10.232.59.111 – 10.232.59.111	10.232.59.111
113	10.232.59.112/32	10.232.59.112 – 10.232.59.112	10.232.59.112
114	10.232.59.113/32	10.232.59.113 – 10.232.59.113	10.232.59.113
115	10.232.59.114/32	10.232.59.114 – 10.232.59.114	10.232.59.114
116	10.232.59.115/32	10.232.59.115 – 10.232.59.115	10.232.59.115
117	10.232.59.116/32	10.232.59.116 – 10.232.59.116	10.232.59.116
118	10.232.59.117/32	10.232.59.117 – 10.232.59.117	10.232.59.117
119	10.232.59.118/32	10.232.59.118 – 10.232.59.118	10.232.59.118
120	10.232.59.119/32	10.232.59.119 – 10.232.59.119	10.232.59.119
121	10.232.59.120/32	10.232.59.120 – 10.232.59.120	10.232.59.120
122	10.232.59.121/32	10.232.59.121 – 10.232.59.121	10.232.59.121
123	10.232.59.122/32	10.232.59.122 – 10.232.59.122	10.232.59.122
124	10.232.59.123/32	10.232.59.123 – 10.232.59.123	10.232.59.123
125	10.232.59.124/32	10.232.59.124 – 10.232.59.124	10.232.59.124
126	10.232.59.125/32	10.232.59.125 – 10.232.59.125	10.232.59.125
127	10.232.59.126/32	10.232.59.126 – 10.232.59.126	10.232.59.126
128	10.232.59.127/32	10.232.59.127 – 10.232.59.127	10.232.59.127

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 →