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)10.149.90.0/25

network10.149.90.0/25

broadcast10.149.90.127

first host10.149.90.1

last host10.149.90.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.149.90.0/25

address00001010.10010101.01011010.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10010101.01011010.00000000

broadcast00001010.10010101.01011010.01111111

green = network part, grey = host part

hex0x0a955a00

decimal177560064

reverse dns0.90.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:5a00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.149.90.0/32	10.149.90.0 – 10.149.90.0	10.149.90.0
2	10.149.90.1/32	10.149.90.1 – 10.149.90.1	10.149.90.1
3	10.149.90.2/32	10.149.90.2 – 10.149.90.2	10.149.90.2
4	10.149.90.3/32	10.149.90.3 – 10.149.90.3	10.149.90.3
5	10.149.90.4/32	10.149.90.4 – 10.149.90.4	10.149.90.4
6	10.149.90.5/32	10.149.90.5 – 10.149.90.5	10.149.90.5
7	10.149.90.6/32	10.149.90.6 – 10.149.90.6	10.149.90.6
8	10.149.90.7/32	10.149.90.7 – 10.149.90.7	10.149.90.7
9	10.149.90.8/32	10.149.90.8 – 10.149.90.8	10.149.90.8
10	10.149.90.9/32	10.149.90.9 – 10.149.90.9	10.149.90.9
11	10.149.90.10/32	10.149.90.10 – 10.149.90.10	10.149.90.10
12	10.149.90.11/32	10.149.90.11 – 10.149.90.11	10.149.90.11
13	10.149.90.12/32	10.149.90.12 – 10.149.90.12	10.149.90.12
14	10.149.90.13/32	10.149.90.13 – 10.149.90.13	10.149.90.13
15	10.149.90.14/32	10.149.90.14 – 10.149.90.14	10.149.90.14
16	10.149.90.15/32	10.149.90.15 – 10.149.90.15	10.149.90.15
17	10.149.90.16/32	10.149.90.16 – 10.149.90.16	10.149.90.16
18	10.149.90.17/32	10.149.90.17 – 10.149.90.17	10.149.90.17
19	10.149.90.18/32	10.149.90.18 – 10.149.90.18	10.149.90.18
20	10.149.90.19/32	10.149.90.19 – 10.149.90.19	10.149.90.19
21	10.149.90.20/32	10.149.90.20 – 10.149.90.20	10.149.90.20
22	10.149.90.21/32	10.149.90.21 – 10.149.90.21	10.149.90.21
23	10.149.90.22/32	10.149.90.22 – 10.149.90.22	10.149.90.22
24	10.149.90.23/32	10.149.90.23 – 10.149.90.23	10.149.90.23
25	10.149.90.24/32	10.149.90.24 – 10.149.90.24	10.149.90.24
26	10.149.90.25/32	10.149.90.25 – 10.149.90.25	10.149.90.25
27	10.149.90.26/32	10.149.90.26 – 10.149.90.26	10.149.90.26
28	10.149.90.27/32	10.149.90.27 – 10.149.90.27	10.149.90.27
29	10.149.90.28/32	10.149.90.28 – 10.149.90.28	10.149.90.28
30	10.149.90.29/32	10.149.90.29 – 10.149.90.29	10.149.90.29
31	10.149.90.30/32	10.149.90.30 – 10.149.90.30	10.149.90.30
32	10.149.90.31/32	10.149.90.31 – 10.149.90.31	10.149.90.31
33	10.149.90.32/32	10.149.90.32 – 10.149.90.32	10.149.90.32
34	10.149.90.33/32	10.149.90.33 – 10.149.90.33	10.149.90.33
35	10.149.90.34/32	10.149.90.34 – 10.149.90.34	10.149.90.34
36	10.149.90.35/32	10.149.90.35 – 10.149.90.35	10.149.90.35
37	10.149.90.36/32	10.149.90.36 – 10.149.90.36	10.149.90.36
38	10.149.90.37/32	10.149.90.37 – 10.149.90.37	10.149.90.37
39	10.149.90.38/32	10.149.90.38 – 10.149.90.38	10.149.90.38
40	10.149.90.39/32	10.149.90.39 – 10.149.90.39	10.149.90.39
41	10.149.90.40/32	10.149.90.40 – 10.149.90.40	10.149.90.40
42	10.149.90.41/32	10.149.90.41 – 10.149.90.41	10.149.90.41
43	10.149.90.42/32	10.149.90.42 – 10.149.90.42	10.149.90.42
44	10.149.90.43/32	10.149.90.43 – 10.149.90.43	10.149.90.43
45	10.149.90.44/32	10.149.90.44 – 10.149.90.44	10.149.90.44
46	10.149.90.45/32	10.149.90.45 – 10.149.90.45	10.149.90.45
47	10.149.90.46/32	10.149.90.46 – 10.149.90.46	10.149.90.46
48	10.149.90.47/32	10.149.90.47 – 10.149.90.47	10.149.90.47
49	10.149.90.48/32	10.149.90.48 – 10.149.90.48	10.149.90.48
50	10.149.90.49/32	10.149.90.49 – 10.149.90.49	10.149.90.49
51	10.149.90.50/32	10.149.90.50 – 10.149.90.50	10.149.90.50
52	10.149.90.51/32	10.149.90.51 – 10.149.90.51	10.149.90.51
53	10.149.90.52/32	10.149.90.52 – 10.149.90.52	10.149.90.52
54	10.149.90.53/32	10.149.90.53 – 10.149.90.53	10.149.90.53
55	10.149.90.54/32	10.149.90.54 – 10.149.90.54	10.149.90.54
56	10.149.90.55/32	10.149.90.55 – 10.149.90.55	10.149.90.55
57	10.149.90.56/32	10.149.90.56 – 10.149.90.56	10.149.90.56
58	10.149.90.57/32	10.149.90.57 – 10.149.90.57	10.149.90.57
59	10.149.90.58/32	10.149.90.58 – 10.149.90.58	10.149.90.58
60	10.149.90.59/32	10.149.90.59 – 10.149.90.59	10.149.90.59
61	10.149.90.60/32	10.149.90.60 – 10.149.90.60	10.149.90.60
62	10.149.90.61/32	10.149.90.61 – 10.149.90.61	10.149.90.61
63	10.149.90.62/32	10.149.90.62 – 10.149.90.62	10.149.90.62
64	10.149.90.63/32	10.149.90.63 – 10.149.90.63	10.149.90.63
65	10.149.90.64/32	10.149.90.64 – 10.149.90.64	10.149.90.64
66	10.149.90.65/32	10.149.90.65 – 10.149.90.65	10.149.90.65
67	10.149.90.66/32	10.149.90.66 – 10.149.90.66	10.149.90.66
68	10.149.90.67/32	10.149.90.67 – 10.149.90.67	10.149.90.67
69	10.149.90.68/32	10.149.90.68 – 10.149.90.68	10.149.90.68
70	10.149.90.69/32	10.149.90.69 – 10.149.90.69	10.149.90.69
71	10.149.90.70/32	10.149.90.70 – 10.149.90.70	10.149.90.70
72	10.149.90.71/32	10.149.90.71 – 10.149.90.71	10.149.90.71
73	10.149.90.72/32	10.149.90.72 – 10.149.90.72	10.149.90.72
74	10.149.90.73/32	10.149.90.73 – 10.149.90.73	10.149.90.73
75	10.149.90.74/32	10.149.90.74 – 10.149.90.74	10.149.90.74
76	10.149.90.75/32	10.149.90.75 – 10.149.90.75	10.149.90.75
77	10.149.90.76/32	10.149.90.76 – 10.149.90.76	10.149.90.76
78	10.149.90.77/32	10.149.90.77 – 10.149.90.77	10.149.90.77
79	10.149.90.78/32	10.149.90.78 – 10.149.90.78	10.149.90.78
80	10.149.90.79/32	10.149.90.79 – 10.149.90.79	10.149.90.79
81	10.149.90.80/32	10.149.90.80 – 10.149.90.80	10.149.90.80
82	10.149.90.81/32	10.149.90.81 – 10.149.90.81	10.149.90.81
83	10.149.90.82/32	10.149.90.82 – 10.149.90.82	10.149.90.82
84	10.149.90.83/32	10.149.90.83 – 10.149.90.83	10.149.90.83
85	10.149.90.84/32	10.149.90.84 – 10.149.90.84	10.149.90.84
86	10.149.90.85/32	10.149.90.85 – 10.149.90.85	10.149.90.85
87	10.149.90.86/32	10.149.90.86 – 10.149.90.86	10.149.90.86
88	10.149.90.87/32	10.149.90.87 – 10.149.90.87	10.149.90.87
89	10.149.90.88/32	10.149.90.88 – 10.149.90.88	10.149.90.88
90	10.149.90.89/32	10.149.90.89 – 10.149.90.89	10.149.90.89
91	10.149.90.90/32	10.149.90.90 – 10.149.90.90	10.149.90.90
92	10.149.90.91/32	10.149.90.91 – 10.149.90.91	10.149.90.91
93	10.149.90.92/32	10.149.90.92 – 10.149.90.92	10.149.90.92
94	10.149.90.93/32	10.149.90.93 – 10.149.90.93	10.149.90.93
95	10.149.90.94/32	10.149.90.94 – 10.149.90.94	10.149.90.94
96	10.149.90.95/32	10.149.90.95 – 10.149.90.95	10.149.90.95
97	10.149.90.96/32	10.149.90.96 – 10.149.90.96	10.149.90.96
98	10.149.90.97/32	10.149.90.97 – 10.149.90.97	10.149.90.97
99	10.149.90.98/32	10.149.90.98 – 10.149.90.98	10.149.90.98
100	10.149.90.99/32	10.149.90.99 – 10.149.90.99	10.149.90.99
101	10.149.90.100/32	10.149.90.100 – 10.149.90.100	10.149.90.100
102	10.149.90.101/32	10.149.90.101 – 10.149.90.101	10.149.90.101
103	10.149.90.102/32	10.149.90.102 – 10.149.90.102	10.149.90.102
104	10.149.90.103/32	10.149.90.103 – 10.149.90.103	10.149.90.103
105	10.149.90.104/32	10.149.90.104 – 10.149.90.104	10.149.90.104
106	10.149.90.105/32	10.149.90.105 – 10.149.90.105	10.149.90.105
107	10.149.90.106/32	10.149.90.106 – 10.149.90.106	10.149.90.106
108	10.149.90.107/32	10.149.90.107 – 10.149.90.107	10.149.90.107
109	10.149.90.108/32	10.149.90.108 – 10.149.90.108	10.149.90.108
110	10.149.90.109/32	10.149.90.109 – 10.149.90.109	10.149.90.109
111	10.149.90.110/32	10.149.90.110 – 10.149.90.110	10.149.90.110
112	10.149.90.111/32	10.149.90.111 – 10.149.90.111	10.149.90.111
113	10.149.90.112/32	10.149.90.112 – 10.149.90.112	10.149.90.112
114	10.149.90.113/32	10.149.90.113 – 10.149.90.113	10.149.90.113
115	10.149.90.114/32	10.149.90.114 – 10.149.90.114	10.149.90.114
116	10.149.90.115/32	10.149.90.115 – 10.149.90.115	10.149.90.115
117	10.149.90.116/32	10.149.90.116 – 10.149.90.116	10.149.90.116
118	10.149.90.117/32	10.149.90.117 – 10.149.90.117	10.149.90.117
119	10.149.90.118/32	10.149.90.118 – 10.149.90.118	10.149.90.118
120	10.149.90.119/32	10.149.90.119 – 10.149.90.119	10.149.90.119
121	10.149.90.120/32	10.149.90.120 – 10.149.90.120	10.149.90.120
122	10.149.90.121/32	10.149.90.121 – 10.149.90.121	10.149.90.121
123	10.149.90.122/32	10.149.90.122 – 10.149.90.122	10.149.90.122
124	10.149.90.123/32	10.149.90.123 – 10.149.90.123	10.149.90.123
125	10.149.90.124/32	10.149.90.124 – 10.149.90.124	10.149.90.124
126	10.149.90.125/32	10.149.90.125 – 10.149.90.125	10.149.90.125
127	10.149.90.126/32	10.149.90.126 – 10.149.90.126	10.149.90.126
128	10.149.90.127/32	10.149.90.127 – 10.149.90.127	10.149.90.127

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 →