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)10.0.107.0/25

network10.0.107.0/25

broadcast10.0.107.127

first host10.0.107.1

last host10.0.107.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.0.107.0/25

address00001010.00000000.01101011.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000000.01101011.00000000

broadcast00001010.00000000.01101011.01111111

green = network part, grey = host part

hex0x0a006b00

decimal167799552

reverse dns0.107.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:6b00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.0.107.0/32	10.0.107.0 – 10.0.107.0	10.0.107.0
2	10.0.107.1/32	10.0.107.1 – 10.0.107.1	10.0.107.1
3	10.0.107.2/32	10.0.107.2 – 10.0.107.2	10.0.107.2
4	10.0.107.3/32	10.0.107.3 – 10.0.107.3	10.0.107.3
5	10.0.107.4/32	10.0.107.4 – 10.0.107.4	10.0.107.4
6	10.0.107.5/32	10.0.107.5 – 10.0.107.5	10.0.107.5
7	10.0.107.6/32	10.0.107.6 – 10.0.107.6	10.0.107.6
8	10.0.107.7/32	10.0.107.7 – 10.0.107.7	10.0.107.7
9	10.0.107.8/32	10.0.107.8 – 10.0.107.8	10.0.107.8
10	10.0.107.9/32	10.0.107.9 – 10.0.107.9	10.0.107.9
11	10.0.107.10/32	10.0.107.10 – 10.0.107.10	10.0.107.10
12	10.0.107.11/32	10.0.107.11 – 10.0.107.11	10.0.107.11
13	10.0.107.12/32	10.0.107.12 – 10.0.107.12	10.0.107.12
14	10.0.107.13/32	10.0.107.13 – 10.0.107.13	10.0.107.13
15	10.0.107.14/32	10.0.107.14 – 10.0.107.14	10.0.107.14
16	10.0.107.15/32	10.0.107.15 – 10.0.107.15	10.0.107.15
17	10.0.107.16/32	10.0.107.16 – 10.0.107.16	10.0.107.16
18	10.0.107.17/32	10.0.107.17 – 10.0.107.17	10.0.107.17
19	10.0.107.18/32	10.0.107.18 – 10.0.107.18	10.0.107.18
20	10.0.107.19/32	10.0.107.19 – 10.0.107.19	10.0.107.19
21	10.0.107.20/32	10.0.107.20 – 10.0.107.20	10.0.107.20
22	10.0.107.21/32	10.0.107.21 – 10.0.107.21	10.0.107.21
23	10.0.107.22/32	10.0.107.22 – 10.0.107.22	10.0.107.22
24	10.0.107.23/32	10.0.107.23 – 10.0.107.23	10.0.107.23
25	10.0.107.24/32	10.0.107.24 – 10.0.107.24	10.0.107.24
26	10.0.107.25/32	10.0.107.25 – 10.0.107.25	10.0.107.25
27	10.0.107.26/32	10.0.107.26 – 10.0.107.26	10.0.107.26
28	10.0.107.27/32	10.0.107.27 – 10.0.107.27	10.0.107.27
29	10.0.107.28/32	10.0.107.28 – 10.0.107.28	10.0.107.28
30	10.0.107.29/32	10.0.107.29 – 10.0.107.29	10.0.107.29
31	10.0.107.30/32	10.0.107.30 – 10.0.107.30	10.0.107.30
32	10.0.107.31/32	10.0.107.31 – 10.0.107.31	10.0.107.31
33	10.0.107.32/32	10.0.107.32 – 10.0.107.32	10.0.107.32
34	10.0.107.33/32	10.0.107.33 – 10.0.107.33	10.0.107.33
35	10.0.107.34/32	10.0.107.34 – 10.0.107.34	10.0.107.34
36	10.0.107.35/32	10.0.107.35 – 10.0.107.35	10.0.107.35
37	10.0.107.36/32	10.0.107.36 – 10.0.107.36	10.0.107.36
38	10.0.107.37/32	10.0.107.37 – 10.0.107.37	10.0.107.37
39	10.0.107.38/32	10.0.107.38 – 10.0.107.38	10.0.107.38
40	10.0.107.39/32	10.0.107.39 – 10.0.107.39	10.0.107.39
41	10.0.107.40/32	10.0.107.40 – 10.0.107.40	10.0.107.40
42	10.0.107.41/32	10.0.107.41 – 10.0.107.41	10.0.107.41
43	10.0.107.42/32	10.0.107.42 – 10.0.107.42	10.0.107.42
44	10.0.107.43/32	10.0.107.43 – 10.0.107.43	10.0.107.43
45	10.0.107.44/32	10.0.107.44 – 10.0.107.44	10.0.107.44
46	10.0.107.45/32	10.0.107.45 – 10.0.107.45	10.0.107.45
47	10.0.107.46/32	10.0.107.46 – 10.0.107.46	10.0.107.46
48	10.0.107.47/32	10.0.107.47 – 10.0.107.47	10.0.107.47
49	10.0.107.48/32	10.0.107.48 – 10.0.107.48	10.0.107.48
50	10.0.107.49/32	10.0.107.49 – 10.0.107.49	10.0.107.49
51	10.0.107.50/32	10.0.107.50 – 10.0.107.50	10.0.107.50
52	10.0.107.51/32	10.0.107.51 – 10.0.107.51	10.0.107.51
53	10.0.107.52/32	10.0.107.52 – 10.0.107.52	10.0.107.52
54	10.0.107.53/32	10.0.107.53 – 10.0.107.53	10.0.107.53
55	10.0.107.54/32	10.0.107.54 – 10.0.107.54	10.0.107.54
56	10.0.107.55/32	10.0.107.55 – 10.0.107.55	10.0.107.55
57	10.0.107.56/32	10.0.107.56 – 10.0.107.56	10.0.107.56
58	10.0.107.57/32	10.0.107.57 – 10.0.107.57	10.0.107.57
59	10.0.107.58/32	10.0.107.58 – 10.0.107.58	10.0.107.58
60	10.0.107.59/32	10.0.107.59 – 10.0.107.59	10.0.107.59
61	10.0.107.60/32	10.0.107.60 – 10.0.107.60	10.0.107.60
62	10.0.107.61/32	10.0.107.61 – 10.0.107.61	10.0.107.61
63	10.0.107.62/32	10.0.107.62 – 10.0.107.62	10.0.107.62
64	10.0.107.63/32	10.0.107.63 – 10.0.107.63	10.0.107.63
65	10.0.107.64/32	10.0.107.64 – 10.0.107.64	10.0.107.64
66	10.0.107.65/32	10.0.107.65 – 10.0.107.65	10.0.107.65
67	10.0.107.66/32	10.0.107.66 – 10.0.107.66	10.0.107.66
68	10.0.107.67/32	10.0.107.67 – 10.0.107.67	10.0.107.67
69	10.0.107.68/32	10.0.107.68 – 10.0.107.68	10.0.107.68
70	10.0.107.69/32	10.0.107.69 – 10.0.107.69	10.0.107.69
71	10.0.107.70/32	10.0.107.70 – 10.0.107.70	10.0.107.70
72	10.0.107.71/32	10.0.107.71 – 10.0.107.71	10.0.107.71
73	10.0.107.72/32	10.0.107.72 – 10.0.107.72	10.0.107.72
74	10.0.107.73/32	10.0.107.73 – 10.0.107.73	10.0.107.73
75	10.0.107.74/32	10.0.107.74 – 10.0.107.74	10.0.107.74
76	10.0.107.75/32	10.0.107.75 – 10.0.107.75	10.0.107.75
77	10.0.107.76/32	10.0.107.76 – 10.0.107.76	10.0.107.76
78	10.0.107.77/32	10.0.107.77 – 10.0.107.77	10.0.107.77
79	10.0.107.78/32	10.0.107.78 – 10.0.107.78	10.0.107.78
80	10.0.107.79/32	10.0.107.79 – 10.0.107.79	10.0.107.79
81	10.0.107.80/32	10.0.107.80 – 10.0.107.80	10.0.107.80
82	10.0.107.81/32	10.0.107.81 – 10.0.107.81	10.0.107.81
83	10.0.107.82/32	10.0.107.82 – 10.0.107.82	10.0.107.82
84	10.0.107.83/32	10.0.107.83 – 10.0.107.83	10.0.107.83
85	10.0.107.84/32	10.0.107.84 – 10.0.107.84	10.0.107.84
86	10.0.107.85/32	10.0.107.85 – 10.0.107.85	10.0.107.85
87	10.0.107.86/32	10.0.107.86 – 10.0.107.86	10.0.107.86
88	10.0.107.87/32	10.0.107.87 – 10.0.107.87	10.0.107.87
89	10.0.107.88/32	10.0.107.88 – 10.0.107.88	10.0.107.88
90	10.0.107.89/32	10.0.107.89 – 10.0.107.89	10.0.107.89
91	10.0.107.90/32	10.0.107.90 – 10.0.107.90	10.0.107.90
92	10.0.107.91/32	10.0.107.91 – 10.0.107.91	10.0.107.91
93	10.0.107.92/32	10.0.107.92 – 10.0.107.92	10.0.107.92
94	10.0.107.93/32	10.0.107.93 – 10.0.107.93	10.0.107.93
95	10.0.107.94/32	10.0.107.94 – 10.0.107.94	10.0.107.94
96	10.0.107.95/32	10.0.107.95 – 10.0.107.95	10.0.107.95
97	10.0.107.96/32	10.0.107.96 – 10.0.107.96	10.0.107.96
98	10.0.107.97/32	10.0.107.97 – 10.0.107.97	10.0.107.97
99	10.0.107.98/32	10.0.107.98 – 10.0.107.98	10.0.107.98
100	10.0.107.99/32	10.0.107.99 – 10.0.107.99	10.0.107.99
101	10.0.107.100/32	10.0.107.100 – 10.0.107.100	10.0.107.100
102	10.0.107.101/32	10.0.107.101 – 10.0.107.101	10.0.107.101
103	10.0.107.102/32	10.0.107.102 – 10.0.107.102	10.0.107.102
104	10.0.107.103/32	10.0.107.103 – 10.0.107.103	10.0.107.103
105	10.0.107.104/32	10.0.107.104 – 10.0.107.104	10.0.107.104
106	10.0.107.105/32	10.0.107.105 – 10.0.107.105	10.0.107.105
107	10.0.107.106/32	10.0.107.106 – 10.0.107.106	10.0.107.106
108	10.0.107.107/32	10.0.107.107 – 10.0.107.107	10.0.107.107
109	10.0.107.108/32	10.0.107.108 – 10.0.107.108	10.0.107.108
110	10.0.107.109/32	10.0.107.109 – 10.0.107.109	10.0.107.109
111	10.0.107.110/32	10.0.107.110 – 10.0.107.110	10.0.107.110
112	10.0.107.111/32	10.0.107.111 – 10.0.107.111	10.0.107.111
113	10.0.107.112/32	10.0.107.112 – 10.0.107.112	10.0.107.112
114	10.0.107.113/32	10.0.107.113 – 10.0.107.113	10.0.107.113
115	10.0.107.114/32	10.0.107.114 – 10.0.107.114	10.0.107.114
116	10.0.107.115/32	10.0.107.115 – 10.0.107.115	10.0.107.115
117	10.0.107.116/32	10.0.107.116 – 10.0.107.116	10.0.107.116
118	10.0.107.117/32	10.0.107.117 – 10.0.107.117	10.0.107.117
119	10.0.107.118/32	10.0.107.118 – 10.0.107.118	10.0.107.118
120	10.0.107.119/32	10.0.107.119 – 10.0.107.119	10.0.107.119
121	10.0.107.120/32	10.0.107.120 – 10.0.107.120	10.0.107.120
122	10.0.107.121/32	10.0.107.121 – 10.0.107.121	10.0.107.121
123	10.0.107.122/32	10.0.107.122 – 10.0.107.122	10.0.107.122
124	10.0.107.123/32	10.0.107.123 – 10.0.107.123	10.0.107.123
125	10.0.107.124/32	10.0.107.124 – 10.0.107.124	10.0.107.124
126	10.0.107.125/32	10.0.107.125 – 10.0.107.125	10.0.107.125
127	10.0.107.126/32	10.0.107.126 – 10.0.107.126	10.0.107.126
128	10.0.107.127/32	10.0.107.127 – 10.0.107.127	10.0.107.127

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 →