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)10.2.226.0/25

network10.2.226.0/25

broadcast10.2.226.127

first host10.2.226.1

last host10.2.226.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.226.0/25

address00001010.00000010.11100010.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.11100010.00000000

broadcast00001010.00000010.11100010.01111111

green = network part, grey = host part

hex0x0a02e200

decimal167961088

reverse dns0.226.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:e200

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.226.0/32	10.2.226.0 – 10.2.226.0	10.2.226.0
2	10.2.226.1/32	10.2.226.1 – 10.2.226.1	10.2.226.1
3	10.2.226.2/32	10.2.226.2 – 10.2.226.2	10.2.226.2
4	10.2.226.3/32	10.2.226.3 – 10.2.226.3	10.2.226.3
5	10.2.226.4/32	10.2.226.4 – 10.2.226.4	10.2.226.4
6	10.2.226.5/32	10.2.226.5 – 10.2.226.5	10.2.226.5
7	10.2.226.6/32	10.2.226.6 – 10.2.226.6	10.2.226.6
8	10.2.226.7/32	10.2.226.7 – 10.2.226.7	10.2.226.7
9	10.2.226.8/32	10.2.226.8 – 10.2.226.8	10.2.226.8
10	10.2.226.9/32	10.2.226.9 – 10.2.226.9	10.2.226.9
11	10.2.226.10/32	10.2.226.10 – 10.2.226.10	10.2.226.10
12	10.2.226.11/32	10.2.226.11 – 10.2.226.11	10.2.226.11
13	10.2.226.12/32	10.2.226.12 – 10.2.226.12	10.2.226.12
14	10.2.226.13/32	10.2.226.13 – 10.2.226.13	10.2.226.13
15	10.2.226.14/32	10.2.226.14 – 10.2.226.14	10.2.226.14
16	10.2.226.15/32	10.2.226.15 – 10.2.226.15	10.2.226.15
17	10.2.226.16/32	10.2.226.16 – 10.2.226.16	10.2.226.16
18	10.2.226.17/32	10.2.226.17 – 10.2.226.17	10.2.226.17
19	10.2.226.18/32	10.2.226.18 – 10.2.226.18	10.2.226.18
20	10.2.226.19/32	10.2.226.19 – 10.2.226.19	10.2.226.19
21	10.2.226.20/32	10.2.226.20 – 10.2.226.20	10.2.226.20
22	10.2.226.21/32	10.2.226.21 – 10.2.226.21	10.2.226.21
23	10.2.226.22/32	10.2.226.22 – 10.2.226.22	10.2.226.22
24	10.2.226.23/32	10.2.226.23 – 10.2.226.23	10.2.226.23
25	10.2.226.24/32	10.2.226.24 – 10.2.226.24	10.2.226.24
26	10.2.226.25/32	10.2.226.25 – 10.2.226.25	10.2.226.25
27	10.2.226.26/32	10.2.226.26 – 10.2.226.26	10.2.226.26
28	10.2.226.27/32	10.2.226.27 – 10.2.226.27	10.2.226.27
29	10.2.226.28/32	10.2.226.28 – 10.2.226.28	10.2.226.28
30	10.2.226.29/32	10.2.226.29 – 10.2.226.29	10.2.226.29
31	10.2.226.30/32	10.2.226.30 – 10.2.226.30	10.2.226.30
32	10.2.226.31/32	10.2.226.31 – 10.2.226.31	10.2.226.31
33	10.2.226.32/32	10.2.226.32 – 10.2.226.32	10.2.226.32
34	10.2.226.33/32	10.2.226.33 – 10.2.226.33	10.2.226.33
35	10.2.226.34/32	10.2.226.34 – 10.2.226.34	10.2.226.34
36	10.2.226.35/32	10.2.226.35 – 10.2.226.35	10.2.226.35
37	10.2.226.36/32	10.2.226.36 – 10.2.226.36	10.2.226.36
38	10.2.226.37/32	10.2.226.37 – 10.2.226.37	10.2.226.37
39	10.2.226.38/32	10.2.226.38 – 10.2.226.38	10.2.226.38
40	10.2.226.39/32	10.2.226.39 – 10.2.226.39	10.2.226.39
41	10.2.226.40/32	10.2.226.40 – 10.2.226.40	10.2.226.40
42	10.2.226.41/32	10.2.226.41 – 10.2.226.41	10.2.226.41
43	10.2.226.42/32	10.2.226.42 – 10.2.226.42	10.2.226.42
44	10.2.226.43/32	10.2.226.43 – 10.2.226.43	10.2.226.43
45	10.2.226.44/32	10.2.226.44 – 10.2.226.44	10.2.226.44
46	10.2.226.45/32	10.2.226.45 – 10.2.226.45	10.2.226.45
47	10.2.226.46/32	10.2.226.46 – 10.2.226.46	10.2.226.46
48	10.2.226.47/32	10.2.226.47 – 10.2.226.47	10.2.226.47
49	10.2.226.48/32	10.2.226.48 – 10.2.226.48	10.2.226.48
50	10.2.226.49/32	10.2.226.49 – 10.2.226.49	10.2.226.49
51	10.2.226.50/32	10.2.226.50 – 10.2.226.50	10.2.226.50
52	10.2.226.51/32	10.2.226.51 – 10.2.226.51	10.2.226.51
53	10.2.226.52/32	10.2.226.52 – 10.2.226.52	10.2.226.52
54	10.2.226.53/32	10.2.226.53 – 10.2.226.53	10.2.226.53
55	10.2.226.54/32	10.2.226.54 – 10.2.226.54	10.2.226.54
56	10.2.226.55/32	10.2.226.55 – 10.2.226.55	10.2.226.55
57	10.2.226.56/32	10.2.226.56 – 10.2.226.56	10.2.226.56
58	10.2.226.57/32	10.2.226.57 – 10.2.226.57	10.2.226.57
59	10.2.226.58/32	10.2.226.58 – 10.2.226.58	10.2.226.58
60	10.2.226.59/32	10.2.226.59 – 10.2.226.59	10.2.226.59
61	10.2.226.60/32	10.2.226.60 – 10.2.226.60	10.2.226.60
62	10.2.226.61/32	10.2.226.61 – 10.2.226.61	10.2.226.61
63	10.2.226.62/32	10.2.226.62 – 10.2.226.62	10.2.226.62
64	10.2.226.63/32	10.2.226.63 – 10.2.226.63	10.2.226.63
65	10.2.226.64/32	10.2.226.64 – 10.2.226.64	10.2.226.64
66	10.2.226.65/32	10.2.226.65 – 10.2.226.65	10.2.226.65
67	10.2.226.66/32	10.2.226.66 – 10.2.226.66	10.2.226.66
68	10.2.226.67/32	10.2.226.67 – 10.2.226.67	10.2.226.67
69	10.2.226.68/32	10.2.226.68 – 10.2.226.68	10.2.226.68
70	10.2.226.69/32	10.2.226.69 – 10.2.226.69	10.2.226.69
71	10.2.226.70/32	10.2.226.70 – 10.2.226.70	10.2.226.70
72	10.2.226.71/32	10.2.226.71 – 10.2.226.71	10.2.226.71
73	10.2.226.72/32	10.2.226.72 – 10.2.226.72	10.2.226.72
74	10.2.226.73/32	10.2.226.73 – 10.2.226.73	10.2.226.73
75	10.2.226.74/32	10.2.226.74 – 10.2.226.74	10.2.226.74
76	10.2.226.75/32	10.2.226.75 – 10.2.226.75	10.2.226.75
77	10.2.226.76/32	10.2.226.76 – 10.2.226.76	10.2.226.76
78	10.2.226.77/32	10.2.226.77 – 10.2.226.77	10.2.226.77
79	10.2.226.78/32	10.2.226.78 – 10.2.226.78	10.2.226.78
80	10.2.226.79/32	10.2.226.79 – 10.2.226.79	10.2.226.79
81	10.2.226.80/32	10.2.226.80 – 10.2.226.80	10.2.226.80
82	10.2.226.81/32	10.2.226.81 – 10.2.226.81	10.2.226.81
83	10.2.226.82/32	10.2.226.82 – 10.2.226.82	10.2.226.82
84	10.2.226.83/32	10.2.226.83 – 10.2.226.83	10.2.226.83
85	10.2.226.84/32	10.2.226.84 – 10.2.226.84	10.2.226.84
86	10.2.226.85/32	10.2.226.85 – 10.2.226.85	10.2.226.85
87	10.2.226.86/32	10.2.226.86 – 10.2.226.86	10.2.226.86
88	10.2.226.87/32	10.2.226.87 – 10.2.226.87	10.2.226.87
89	10.2.226.88/32	10.2.226.88 – 10.2.226.88	10.2.226.88
90	10.2.226.89/32	10.2.226.89 – 10.2.226.89	10.2.226.89
91	10.2.226.90/32	10.2.226.90 – 10.2.226.90	10.2.226.90
92	10.2.226.91/32	10.2.226.91 – 10.2.226.91	10.2.226.91
93	10.2.226.92/32	10.2.226.92 – 10.2.226.92	10.2.226.92
94	10.2.226.93/32	10.2.226.93 – 10.2.226.93	10.2.226.93
95	10.2.226.94/32	10.2.226.94 – 10.2.226.94	10.2.226.94
96	10.2.226.95/32	10.2.226.95 – 10.2.226.95	10.2.226.95
97	10.2.226.96/32	10.2.226.96 – 10.2.226.96	10.2.226.96
98	10.2.226.97/32	10.2.226.97 – 10.2.226.97	10.2.226.97
99	10.2.226.98/32	10.2.226.98 – 10.2.226.98	10.2.226.98
100	10.2.226.99/32	10.2.226.99 – 10.2.226.99	10.2.226.99
101	10.2.226.100/32	10.2.226.100 – 10.2.226.100	10.2.226.100
102	10.2.226.101/32	10.2.226.101 – 10.2.226.101	10.2.226.101
103	10.2.226.102/32	10.2.226.102 – 10.2.226.102	10.2.226.102
104	10.2.226.103/32	10.2.226.103 – 10.2.226.103	10.2.226.103
105	10.2.226.104/32	10.2.226.104 – 10.2.226.104	10.2.226.104
106	10.2.226.105/32	10.2.226.105 – 10.2.226.105	10.2.226.105
107	10.2.226.106/32	10.2.226.106 – 10.2.226.106	10.2.226.106
108	10.2.226.107/32	10.2.226.107 – 10.2.226.107	10.2.226.107
109	10.2.226.108/32	10.2.226.108 – 10.2.226.108	10.2.226.108
110	10.2.226.109/32	10.2.226.109 – 10.2.226.109	10.2.226.109
111	10.2.226.110/32	10.2.226.110 – 10.2.226.110	10.2.226.110
112	10.2.226.111/32	10.2.226.111 – 10.2.226.111	10.2.226.111
113	10.2.226.112/32	10.2.226.112 – 10.2.226.112	10.2.226.112
114	10.2.226.113/32	10.2.226.113 – 10.2.226.113	10.2.226.113
115	10.2.226.114/32	10.2.226.114 – 10.2.226.114	10.2.226.114
116	10.2.226.115/32	10.2.226.115 – 10.2.226.115	10.2.226.115
117	10.2.226.116/32	10.2.226.116 – 10.2.226.116	10.2.226.116
118	10.2.226.117/32	10.2.226.117 – 10.2.226.117	10.2.226.117
119	10.2.226.118/32	10.2.226.118 – 10.2.226.118	10.2.226.118
120	10.2.226.119/32	10.2.226.119 – 10.2.226.119	10.2.226.119
121	10.2.226.120/32	10.2.226.120 – 10.2.226.120	10.2.226.120
122	10.2.226.121/32	10.2.226.121 – 10.2.226.121	10.2.226.121
123	10.2.226.122/32	10.2.226.122 – 10.2.226.122	10.2.226.122
124	10.2.226.123/32	10.2.226.123 – 10.2.226.123	10.2.226.123
125	10.2.226.124/32	10.2.226.124 – 10.2.226.124	10.2.226.124
126	10.2.226.125/32	10.2.226.125 – 10.2.226.125	10.2.226.125
127	10.2.226.126/32	10.2.226.126 – 10.2.226.126	10.2.226.126
128	10.2.226.127/32	10.2.226.127 – 10.2.226.127	10.2.226.127

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 →