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)10.232.89.0/25

network10.232.89.0/25

broadcast10.232.89.127

first host10.232.89.1

last host10.232.89.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.232.89.0/25

address00001010.11101000.01011001.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.11101000.01011001.00000000

broadcast00001010.11101000.01011001.01111111

green = network part, grey = host part

hex0x0ae85900

decimal182999296

reverse dns0.89.232.10.in-addr.arpa

ipv4-mapped::ffff:ae8:5900

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.232.89.0/32	10.232.89.0 – 10.232.89.0	10.232.89.0
2	10.232.89.1/32	10.232.89.1 – 10.232.89.1	10.232.89.1
3	10.232.89.2/32	10.232.89.2 – 10.232.89.2	10.232.89.2
4	10.232.89.3/32	10.232.89.3 – 10.232.89.3	10.232.89.3
5	10.232.89.4/32	10.232.89.4 – 10.232.89.4	10.232.89.4
6	10.232.89.5/32	10.232.89.5 – 10.232.89.5	10.232.89.5
7	10.232.89.6/32	10.232.89.6 – 10.232.89.6	10.232.89.6
8	10.232.89.7/32	10.232.89.7 – 10.232.89.7	10.232.89.7
9	10.232.89.8/32	10.232.89.8 – 10.232.89.8	10.232.89.8
10	10.232.89.9/32	10.232.89.9 – 10.232.89.9	10.232.89.9
11	10.232.89.10/32	10.232.89.10 – 10.232.89.10	10.232.89.10
12	10.232.89.11/32	10.232.89.11 – 10.232.89.11	10.232.89.11
13	10.232.89.12/32	10.232.89.12 – 10.232.89.12	10.232.89.12
14	10.232.89.13/32	10.232.89.13 – 10.232.89.13	10.232.89.13
15	10.232.89.14/32	10.232.89.14 – 10.232.89.14	10.232.89.14
16	10.232.89.15/32	10.232.89.15 – 10.232.89.15	10.232.89.15
17	10.232.89.16/32	10.232.89.16 – 10.232.89.16	10.232.89.16
18	10.232.89.17/32	10.232.89.17 – 10.232.89.17	10.232.89.17
19	10.232.89.18/32	10.232.89.18 – 10.232.89.18	10.232.89.18
20	10.232.89.19/32	10.232.89.19 – 10.232.89.19	10.232.89.19
21	10.232.89.20/32	10.232.89.20 – 10.232.89.20	10.232.89.20
22	10.232.89.21/32	10.232.89.21 – 10.232.89.21	10.232.89.21
23	10.232.89.22/32	10.232.89.22 – 10.232.89.22	10.232.89.22
24	10.232.89.23/32	10.232.89.23 – 10.232.89.23	10.232.89.23
25	10.232.89.24/32	10.232.89.24 – 10.232.89.24	10.232.89.24
26	10.232.89.25/32	10.232.89.25 – 10.232.89.25	10.232.89.25
27	10.232.89.26/32	10.232.89.26 – 10.232.89.26	10.232.89.26
28	10.232.89.27/32	10.232.89.27 – 10.232.89.27	10.232.89.27
29	10.232.89.28/32	10.232.89.28 – 10.232.89.28	10.232.89.28
30	10.232.89.29/32	10.232.89.29 – 10.232.89.29	10.232.89.29
31	10.232.89.30/32	10.232.89.30 – 10.232.89.30	10.232.89.30
32	10.232.89.31/32	10.232.89.31 – 10.232.89.31	10.232.89.31
33	10.232.89.32/32	10.232.89.32 – 10.232.89.32	10.232.89.32
34	10.232.89.33/32	10.232.89.33 – 10.232.89.33	10.232.89.33
35	10.232.89.34/32	10.232.89.34 – 10.232.89.34	10.232.89.34
36	10.232.89.35/32	10.232.89.35 – 10.232.89.35	10.232.89.35
37	10.232.89.36/32	10.232.89.36 – 10.232.89.36	10.232.89.36
38	10.232.89.37/32	10.232.89.37 – 10.232.89.37	10.232.89.37
39	10.232.89.38/32	10.232.89.38 – 10.232.89.38	10.232.89.38
40	10.232.89.39/32	10.232.89.39 – 10.232.89.39	10.232.89.39
41	10.232.89.40/32	10.232.89.40 – 10.232.89.40	10.232.89.40
42	10.232.89.41/32	10.232.89.41 – 10.232.89.41	10.232.89.41
43	10.232.89.42/32	10.232.89.42 – 10.232.89.42	10.232.89.42
44	10.232.89.43/32	10.232.89.43 – 10.232.89.43	10.232.89.43
45	10.232.89.44/32	10.232.89.44 – 10.232.89.44	10.232.89.44
46	10.232.89.45/32	10.232.89.45 – 10.232.89.45	10.232.89.45
47	10.232.89.46/32	10.232.89.46 – 10.232.89.46	10.232.89.46
48	10.232.89.47/32	10.232.89.47 – 10.232.89.47	10.232.89.47
49	10.232.89.48/32	10.232.89.48 – 10.232.89.48	10.232.89.48
50	10.232.89.49/32	10.232.89.49 – 10.232.89.49	10.232.89.49
51	10.232.89.50/32	10.232.89.50 – 10.232.89.50	10.232.89.50
52	10.232.89.51/32	10.232.89.51 – 10.232.89.51	10.232.89.51
53	10.232.89.52/32	10.232.89.52 – 10.232.89.52	10.232.89.52
54	10.232.89.53/32	10.232.89.53 – 10.232.89.53	10.232.89.53
55	10.232.89.54/32	10.232.89.54 – 10.232.89.54	10.232.89.54
56	10.232.89.55/32	10.232.89.55 – 10.232.89.55	10.232.89.55
57	10.232.89.56/32	10.232.89.56 – 10.232.89.56	10.232.89.56
58	10.232.89.57/32	10.232.89.57 – 10.232.89.57	10.232.89.57
59	10.232.89.58/32	10.232.89.58 – 10.232.89.58	10.232.89.58
60	10.232.89.59/32	10.232.89.59 – 10.232.89.59	10.232.89.59
61	10.232.89.60/32	10.232.89.60 – 10.232.89.60	10.232.89.60
62	10.232.89.61/32	10.232.89.61 – 10.232.89.61	10.232.89.61
63	10.232.89.62/32	10.232.89.62 – 10.232.89.62	10.232.89.62
64	10.232.89.63/32	10.232.89.63 – 10.232.89.63	10.232.89.63
65	10.232.89.64/32	10.232.89.64 – 10.232.89.64	10.232.89.64
66	10.232.89.65/32	10.232.89.65 – 10.232.89.65	10.232.89.65
67	10.232.89.66/32	10.232.89.66 – 10.232.89.66	10.232.89.66
68	10.232.89.67/32	10.232.89.67 – 10.232.89.67	10.232.89.67
69	10.232.89.68/32	10.232.89.68 – 10.232.89.68	10.232.89.68
70	10.232.89.69/32	10.232.89.69 – 10.232.89.69	10.232.89.69
71	10.232.89.70/32	10.232.89.70 – 10.232.89.70	10.232.89.70
72	10.232.89.71/32	10.232.89.71 – 10.232.89.71	10.232.89.71
73	10.232.89.72/32	10.232.89.72 – 10.232.89.72	10.232.89.72
74	10.232.89.73/32	10.232.89.73 – 10.232.89.73	10.232.89.73
75	10.232.89.74/32	10.232.89.74 – 10.232.89.74	10.232.89.74
76	10.232.89.75/32	10.232.89.75 – 10.232.89.75	10.232.89.75
77	10.232.89.76/32	10.232.89.76 – 10.232.89.76	10.232.89.76
78	10.232.89.77/32	10.232.89.77 – 10.232.89.77	10.232.89.77
79	10.232.89.78/32	10.232.89.78 – 10.232.89.78	10.232.89.78
80	10.232.89.79/32	10.232.89.79 – 10.232.89.79	10.232.89.79
81	10.232.89.80/32	10.232.89.80 – 10.232.89.80	10.232.89.80
82	10.232.89.81/32	10.232.89.81 – 10.232.89.81	10.232.89.81
83	10.232.89.82/32	10.232.89.82 – 10.232.89.82	10.232.89.82
84	10.232.89.83/32	10.232.89.83 – 10.232.89.83	10.232.89.83
85	10.232.89.84/32	10.232.89.84 – 10.232.89.84	10.232.89.84
86	10.232.89.85/32	10.232.89.85 – 10.232.89.85	10.232.89.85
87	10.232.89.86/32	10.232.89.86 – 10.232.89.86	10.232.89.86
88	10.232.89.87/32	10.232.89.87 – 10.232.89.87	10.232.89.87
89	10.232.89.88/32	10.232.89.88 – 10.232.89.88	10.232.89.88
90	10.232.89.89/32	10.232.89.89 – 10.232.89.89	10.232.89.89
91	10.232.89.90/32	10.232.89.90 – 10.232.89.90	10.232.89.90
92	10.232.89.91/32	10.232.89.91 – 10.232.89.91	10.232.89.91
93	10.232.89.92/32	10.232.89.92 – 10.232.89.92	10.232.89.92
94	10.232.89.93/32	10.232.89.93 – 10.232.89.93	10.232.89.93
95	10.232.89.94/32	10.232.89.94 – 10.232.89.94	10.232.89.94
96	10.232.89.95/32	10.232.89.95 – 10.232.89.95	10.232.89.95
97	10.232.89.96/32	10.232.89.96 – 10.232.89.96	10.232.89.96
98	10.232.89.97/32	10.232.89.97 – 10.232.89.97	10.232.89.97
99	10.232.89.98/32	10.232.89.98 – 10.232.89.98	10.232.89.98
100	10.232.89.99/32	10.232.89.99 – 10.232.89.99	10.232.89.99
101	10.232.89.100/32	10.232.89.100 – 10.232.89.100	10.232.89.100
102	10.232.89.101/32	10.232.89.101 – 10.232.89.101	10.232.89.101
103	10.232.89.102/32	10.232.89.102 – 10.232.89.102	10.232.89.102
104	10.232.89.103/32	10.232.89.103 – 10.232.89.103	10.232.89.103
105	10.232.89.104/32	10.232.89.104 – 10.232.89.104	10.232.89.104
106	10.232.89.105/32	10.232.89.105 – 10.232.89.105	10.232.89.105
107	10.232.89.106/32	10.232.89.106 – 10.232.89.106	10.232.89.106
108	10.232.89.107/32	10.232.89.107 – 10.232.89.107	10.232.89.107
109	10.232.89.108/32	10.232.89.108 – 10.232.89.108	10.232.89.108
110	10.232.89.109/32	10.232.89.109 – 10.232.89.109	10.232.89.109
111	10.232.89.110/32	10.232.89.110 – 10.232.89.110	10.232.89.110
112	10.232.89.111/32	10.232.89.111 – 10.232.89.111	10.232.89.111
113	10.232.89.112/32	10.232.89.112 – 10.232.89.112	10.232.89.112
114	10.232.89.113/32	10.232.89.113 – 10.232.89.113	10.232.89.113
115	10.232.89.114/32	10.232.89.114 – 10.232.89.114	10.232.89.114
116	10.232.89.115/32	10.232.89.115 – 10.232.89.115	10.232.89.115
117	10.232.89.116/32	10.232.89.116 – 10.232.89.116	10.232.89.116
118	10.232.89.117/32	10.232.89.117 – 10.232.89.117	10.232.89.117
119	10.232.89.118/32	10.232.89.118 – 10.232.89.118	10.232.89.118
120	10.232.89.119/32	10.232.89.119 – 10.232.89.119	10.232.89.119
121	10.232.89.120/32	10.232.89.120 – 10.232.89.120	10.232.89.120
122	10.232.89.121/32	10.232.89.121 – 10.232.89.121	10.232.89.121
123	10.232.89.122/32	10.232.89.122 – 10.232.89.122	10.232.89.122
124	10.232.89.123/32	10.232.89.123 – 10.232.89.123	10.232.89.123
125	10.232.89.124/32	10.232.89.124 – 10.232.89.124	10.232.89.124
126	10.232.89.125/32	10.232.89.125 – 10.232.89.125	10.232.89.125
127	10.232.89.126/32	10.232.89.126 – 10.232.89.126	10.232.89.126
128	10.232.89.127/32	10.232.89.127 – 10.232.89.127	10.232.89.127

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 →