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)10.3.229.0/25

network10.3.229.0/25

broadcast10.3.229.127

first host10.3.229.1

last host10.3.229.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.3.229.0/25

address00001010.00000011.11100101.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000011.11100101.00000000

broadcast00001010.00000011.11100101.01111111

green = network part, grey = host part

hex0x0a03e500

decimal168027392

reverse dns0.229.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:e500

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.3.229.0/32	10.3.229.0 – 10.3.229.0	10.3.229.0
2	10.3.229.1/32	10.3.229.1 – 10.3.229.1	10.3.229.1
3	10.3.229.2/32	10.3.229.2 – 10.3.229.2	10.3.229.2
4	10.3.229.3/32	10.3.229.3 – 10.3.229.3	10.3.229.3
5	10.3.229.4/32	10.3.229.4 – 10.3.229.4	10.3.229.4
6	10.3.229.5/32	10.3.229.5 – 10.3.229.5	10.3.229.5
7	10.3.229.6/32	10.3.229.6 – 10.3.229.6	10.3.229.6
8	10.3.229.7/32	10.3.229.7 – 10.3.229.7	10.3.229.7
9	10.3.229.8/32	10.3.229.8 – 10.3.229.8	10.3.229.8
10	10.3.229.9/32	10.3.229.9 – 10.3.229.9	10.3.229.9
11	10.3.229.10/32	10.3.229.10 – 10.3.229.10	10.3.229.10
12	10.3.229.11/32	10.3.229.11 – 10.3.229.11	10.3.229.11
13	10.3.229.12/32	10.3.229.12 – 10.3.229.12	10.3.229.12
14	10.3.229.13/32	10.3.229.13 – 10.3.229.13	10.3.229.13
15	10.3.229.14/32	10.3.229.14 – 10.3.229.14	10.3.229.14
16	10.3.229.15/32	10.3.229.15 – 10.3.229.15	10.3.229.15
17	10.3.229.16/32	10.3.229.16 – 10.3.229.16	10.3.229.16
18	10.3.229.17/32	10.3.229.17 – 10.3.229.17	10.3.229.17
19	10.3.229.18/32	10.3.229.18 – 10.3.229.18	10.3.229.18
20	10.3.229.19/32	10.3.229.19 – 10.3.229.19	10.3.229.19
21	10.3.229.20/32	10.3.229.20 – 10.3.229.20	10.3.229.20
22	10.3.229.21/32	10.3.229.21 – 10.3.229.21	10.3.229.21
23	10.3.229.22/32	10.3.229.22 – 10.3.229.22	10.3.229.22
24	10.3.229.23/32	10.3.229.23 – 10.3.229.23	10.3.229.23
25	10.3.229.24/32	10.3.229.24 – 10.3.229.24	10.3.229.24
26	10.3.229.25/32	10.3.229.25 – 10.3.229.25	10.3.229.25
27	10.3.229.26/32	10.3.229.26 – 10.3.229.26	10.3.229.26
28	10.3.229.27/32	10.3.229.27 – 10.3.229.27	10.3.229.27
29	10.3.229.28/32	10.3.229.28 – 10.3.229.28	10.3.229.28
30	10.3.229.29/32	10.3.229.29 – 10.3.229.29	10.3.229.29
31	10.3.229.30/32	10.3.229.30 – 10.3.229.30	10.3.229.30
32	10.3.229.31/32	10.3.229.31 – 10.3.229.31	10.3.229.31
33	10.3.229.32/32	10.3.229.32 – 10.3.229.32	10.3.229.32
34	10.3.229.33/32	10.3.229.33 – 10.3.229.33	10.3.229.33
35	10.3.229.34/32	10.3.229.34 – 10.3.229.34	10.3.229.34
36	10.3.229.35/32	10.3.229.35 – 10.3.229.35	10.3.229.35
37	10.3.229.36/32	10.3.229.36 – 10.3.229.36	10.3.229.36
38	10.3.229.37/32	10.3.229.37 – 10.3.229.37	10.3.229.37
39	10.3.229.38/32	10.3.229.38 – 10.3.229.38	10.3.229.38
40	10.3.229.39/32	10.3.229.39 – 10.3.229.39	10.3.229.39
41	10.3.229.40/32	10.3.229.40 – 10.3.229.40	10.3.229.40
42	10.3.229.41/32	10.3.229.41 – 10.3.229.41	10.3.229.41
43	10.3.229.42/32	10.3.229.42 – 10.3.229.42	10.3.229.42
44	10.3.229.43/32	10.3.229.43 – 10.3.229.43	10.3.229.43
45	10.3.229.44/32	10.3.229.44 – 10.3.229.44	10.3.229.44
46	10.3.229.45/32	10.3.229.45 – 10.3.229.45	10.3.229.45
47	10.3.229.46/32	10.3.229.46 – 10.3.229.46	10.3.229.46
48	10.3.229.47/32	10.3.229.47 – 10.3.229.47	10.3.229.47
49	10.3.229.48/32	10.3.229.48 – 10.3.229.48	10.3.229.48
50	10.3.229.49/32	10.3.229.49 – 10.3.229.49	10.3.229.49
51	10.3.229.50/32	10.3.229.50 – 10.3.229.50	10.3.229.50
52	10.3.229.51/32	10.3.229.51 – 10.3.229.51	10.3.229.51
53	10.3.229.52/32	10.3.229.52 – 10.3.229.52	10.3.229.52
54	10.3.229.53/32	10.3.229.53 – 10.3.229.53	10.3.229.53
55	10.3.229.54/32	10.3.229.54 – 10.3.229.54	10.3.229.54
56	10.3.229.55/32	10.3.229.55 – 10.3.229.55	10.3.229.55
57	10.3.229.56/32	10.3.229.56 – 10.3.229.56	10.3.229.56
58	10.3.229.57/32	10.3.229.57 – 10.3.229.57	10.3.229.57
59	10.3.229.58/32	10.3.229.58 – 10.3.229.58	10.3.229.58
60	10.3.229.59/32	10.3.229.59 – 10.3.229.59	10.3.229.59
61	10.3.229.60/32	10.3.229.60 – 10.3.229.60	10.3.229.60
62	10.3.229.61/32	10.3.229.61 – 10.3.229.61	10.3.229.61
63	10.3.229.62/32	10.3.229.62 – 10.3.229.62	10.3.229.62
64	10.3.229.63/32	10.3.229.63 – 10.3.229.63	10.3.229.63
65	10.3.229.64/32	10.3.229.64 – 10.3.229.64	10.3.229.64
66	10.3.229.65/32	10.3.229.65 – 10.3.229.65	10.3.229.65
67	10.3.229.66/32	10.3.229.66 – 10.3.229.66	10.3.229.66
68	10.3.229.67/32	10.3.229.67 – 10.3.229.67	10.3.229.67
69	10.3.229.68/32	10.3.229.68 – 10.3.229.68	10.3.229.68
70	10.3.229.69/32	10.3.229.69 – 10.3.229.69	10.3.229.69
71	10.3.229.70/32	10.3.229.70 – 10.3.229.70	10.3.229.70
72	10.3.229.71/32	10.3.229.71 – 10.3.229.71	10.3.229.71
73	10.3.229.72/32	10.3.229.72 – 10.3.229.72	10.3.229.72
74	10.3.229.73/32	10.3.229.73 – 10.3.229.73	10.3.229.73
75	10.3.229.74/32	10.3.229.74 – 10.3.229.74	10.3.229.74
76	10.3.229.75/32	10.3.229.75 – 10.3.229.75	10.3.229.75
77	10.3.229.76/32	10.3.229.76 – 10.3.229.76	10.3.229.76
78	10.3.229.77/32	10.3.229.77 – 10.3.229.77	10.3.229.77
79	10.3.229.78/32	10.3.229.78 – 10.3.229.78	10.3.229.78
80	10.3.229.79/32	10.3.229.79 – 10.3.229.79	10.3.229.79
81	10.3.229.80/32	10.3.229.80 – 10.3.229.80	10.3.229.80
82	10.3.229.81/32	10.3.229.81 – 10.3.229.81	10.3.229.81
83	10.3.229.82/32	10.3.229.82 – 10.3.229.82	10.3.229.82
84	10.3.229.83/32	10.3.229.83 – 10.3.229.83	10.3.229.83
85	10.3.229.84/32	10.3.229.84 – 10.3.229.84	10.3.229.84
86	10.3.229.85/32	10.3.229.85 – 10.3.229.85	10.3.229.85
87	10.3.229.86/32	10.3.229.86 – 10.3.229.86	10.3.229.86
88	10.3.229.87/32	10.3.229.87 – 10.3.229.87	10.3.229.87
89	10.3.229.88/32	10.3.229.88 – 10.3.229.88	10.3.229.88
90	10.3.229.89/32	10.3.229.89 – 10.3.229.89	10.3.229.89
91	10.3.229.90/32	10.3.229.90 – 10.3.229.90	10.3.229.90
92	10.3.229.91/32	10.3.229.91 – 10.3.229.91	10.3.229.91
93	10.3.229.92/32	10.3.229.92 – 10.3.229.92	10.3.229.92
94	10.3.229.93/32	10.3.229.93 – 10.3.229.93	10.3.229.93
95	10.3.229.94/32	10.3.229.94 – 10.3.229.94	10.3.229.94
96	10.3.229.95/32	10.3.229.95 – 10.3.229.95	10.3.229.95
97	10.3.229.96/32	10.3.229.96 – 10.3.229.96	10.3.229.96
98	10.3.229.97/32	10.3.229.97 – 10.3.229.97	10.3.229.97
99	10.3.229.98/32	10.3.229.98 – 10.3.229.98	10.3.229.98
100	10.3.229.99/32	10.3.229.99 – 10.3.229.99	10.3.229.99
101	10.3.229.100/32	10.3.229.100 – 10.3.229.100	10.3.229.100
102	10.3.229.101/32	10.3.229.101 – 10.3.229.101	10.3.229.101
103	10.3.229.102/32	10.3.229.102 – 10.3.229.102	10.3.229.102
104	10.3.229.103/32	10.3.229.103 – 10.3.229.103	10.3.229.103
105	10.3.229.104/32	10.3.229.104 – 10.3.229.104	10.3.229.104
106	10.3.229.105/32	10.3.229.105 – 10.3.229.105	10.3.229.105
107	10.3.229.106/32	10.3.229.106 – 10.3.229.106	10.3.229.106
108	10.3.229.107/32	10.3.229.107 – 10.3.229.107	10.3.229.107
109	10.3.229.108/32	10.3.229.108 – 10.3.229.108	10.3.229.108
110	10.3.229.109/32	10.3.229.109 – 10.3.229.109	10.3.229.109
111	10.3.229.110/32	10.3.229.110 – 10.3.229.110	10.3.229.110
112	10.3.229.111/32	10.3.229.111 – 10.3.229.111	10.3.229.111
113	10.3.229.112/32	10.3.229.112 – 10.3.229.112	10.3.229.112
114	10.3.229.113/32	10.3.229.113 – 10.3.229.113	10.3.229.113
115	10.3.229.114/32	10.3.229.114 – 10.3.229.114	10.3.229.114
116	10.3.229.115/32	10.3.229.115 – 10.3.229.115	10.3.229.115
117	10.3.229.116/32	10.3.229.116 – 10.3.229.116	10.3.229.116
118	10.3.229.117/32	10.3.229.117 – 10.3.229.117	10.3.229.117
119	10.3.229.118/32	10.3.229.118 – 10.3.229.118	10.3.229.118
120	10.3.229.119/32	10.3.229.119 – 10.3.229.119	10.3.229.119
121	10.3.229.120/32	10.3.229.120 – 10.3.229.120	10.3.229.120
122	10.3.229.121/32	10.3.229.121 – 10.3.229.121	10.3.229.121
123	10.3.229.122/32	10.3.229.122 – 10.3.229.122	10.3.229.122
124	10.3.229.123/32	10.3.229.123 – 10.3.229.123	10.3.229.123
125	10.3.229.124/32	10.3.229.124 – 10.3.229.124	10.3.229.124
126	10.3.229.125/32	10.3.229.125 – 10.3.229.125	10.3.229.125
127	10.3.229.126/32	10.3.229.126 – 10.3.229.126	10.3.229.126
128	10.3.229.127/32	10.3.229.127 – 10.3.229.127	10.3.229.127

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 →