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)10.2.95.0/25

network10.2.95.0/25

broadcast10.2.95.127

first host10.2.95.1

last host10.2.95.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.95.0/25

address00001010.00000010.01011111.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.01011111.00000000

broadcast00001010.00000010.01011111.01111111

green = network part, grey = host part

hex0x0a025f00

decimal167927552

reverse dns0.95.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:5f00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.95.0/32	10.2.95.0 – 10.2.95.0	10.2.95.0
2	10.2.95.1/32	10.2.95.1 – 10.2.95.1	10.2.95.1
3	10.2.95.2/32	10.2.95.2 – 10.2.95.2	10.2.95.2
4	10.2.95.3/32	10.2.95.3 – 10.2.95.3	10.2.95.3
5	10.2.95.4/32	10.2.95.4 – 10.2.95.4	10.2.95.4
6	10.2.95.5/32	10.2.95.5 – 10.2.95.5	10.2.95.5
7	10.2.95.6/32	10.2.95.6 – 10.2.95.6	10.2.95.6
8	10.2.95.7/32	10.2.95.7 – 10.2.95.7	10.2.95.7
9	10.2.95.8/32	10.2.95.8 – 10.2.95.8	10.2.95.8
10	10.2.95.9/32	10.2.95.9 – 10.2.95.9	10.2.95.9
11	10.2.95.10/32	10.2.95.10 – 10.2.95.10	10.2.95.10
12	10.2.95.11/32	10.2.95.11 – 10.2.95.11	10.2.95.11
13	10.2.95.12/32	10.2.95.12 – 10.2.95.12	10.2.95.12
14	10.2.95.13/32	10.2.95.13 – 10.2.95.13	10.2.95.13
15	10.2.95.14/32	10.2.95.14 – 10.2.95.14	10.2.95.14
16	10.2.95.15/32	10.2.95.15 – 10.2.95.15	10.2.95.15
17	10.2.95.16/32	10.2.95.16 – 10.2.95.16	10.2.95.16
18	10.2.95.17/32	10.2.95.17 – 10.2.95.17	10.2.95.17
19	10.2.95.18/32	10.2.95.18 – 10.2.95.18	10.2.95.18
20	10.2.95.19/32	10.2.95.19 – 10.2.95.19	10.2.95.19
21	10.2.95.20/32	10.2.95.20 – 10.2.95.20	10.2.95.20
22	10.2.95.21/32	10.2.95.21 – 10.2.95.21	10.2.95.21
23	10.2.95.22/32	10.2.95.22 – 10.2.95.22	10.2.95.22
24	10.2.95.23/32	10.2.95.23 – 10.2.95.23	10.2.95.23
25	10.2.95.24/32	10.2.95.24 – 10.2.95.24	10.2.95.24
26	10.2.95.25/32	10.2.95.25 – 10.2.95.25	10.2.95.25
27	10.2.95.26/32	10.2.95.26 – 10.2.95.26	10.2.95.26
28	10.2.95.27/32	10.2.95.27 – 10.2.95.27	10.2.95.27
29	10.2.95.28/32	10.2.95.28 – 10.2.95.28	10.2.95.28
30	10.2.95.29/32	10.2.95.29 – 10.2.95.29	10.2.95.29
31	10.2.95.30/32	10.2.95.30 – 10.2.95.30	10.2.95.30
32	10.2.95.31/32	10.2.95.31 – 10.2.95.31	10.2.95.31
33	10.2.95.32/32	10.2.95.32 – 10.2.95.32	10.2.95.32
34	10.2.95.33/32	10.2.95.33 – 10.2.95.33	10.2.95.33
35	10.2.95.34/32	10.2.95.34 – 10.2.95.34	10.2.95.34
36	10.2.95.35/32	10.2.95.35 – 10.2.95.35	10.2.95.35
37	10.2.95.36/32	10.2.95.36 – 10.2.95.36	10.2.95.36
38	10.2.95.37/32	10.2.95.37 – 10.2.95.37	10.2.95.37
39	10.2.95.38/32	10.2.95.38 – 10.2.95.38	10.2.95.38
40	10.2.95.39/32	10.2.95.39 – 10.2.95.39	10.2.95.39
41	10.2.95.40/32	10.2.95.40 – 10.2.95.40	10.2.95.40
42	10.2.95.41/32	10.2.95.41 – 10.2.95.41	10.2.95.41
43	10.2.95.42/32	10.2.95.42 – 10.2.95.42	10.2.95.42
44	10.2.95.43/32	10.2.95.43 – 10.2.95.43	10.2.95.43
45	10.2.95.44/32	10.2.95.44 – 10.2.95.44	10.2.95.44
46	10.2.95.45/32	10.2.95.45 – 10.2.95.45	10.2.95.45
47	10.2.95.46/32	10.2.95.46 – 10.2.95.46	10.2.95.46
48	10.2.95.47/32	10.2.95.47 – 10.2.95.47	10.2.95.47
49	10.2.95.48/32	10.2.95.48 – 10.2.95.48	10.2.95.48
50	10.2.95.49/32	10.2.95.49 – 10.2.95.49	10.2.95.49
51	10.2.95.50/32	10.2.95.50 – 10.2.95.50	10.2.95.50
52	10.2.95.51/32	10.2.95.51 – 10.2.95.51	10.2.95.51
53	10.2.95.52/32	10.2.95.52 – 10.2.95.52	10.2.95.52
54	10.2.95.53/32	10.2.95.53 – 10.2.95.53	10.2.95.53
55	10.2.95.54/32	10.2.95.54 – 10.2.95.54	10.2.95.54
56	10.2.95.55/32	10.2.95.55 – 10.2.95.55	10.2.95.55
57	10.2.95.56/32	10.2.95.56 – 10.2.95.56	10.2.95.56
58	10.2.95.57/32	10.2.95.57 – 10.2.95.57	10.2.95.57
59	10.2.95.58/32	10.2.95.58 – 10.2.95.58	10.2.95.58
60	10.2.95.59/32	10.2.95.59 – 10.2.95.59	10.2.95.59
61	10.2.95.60/32	10.2.95.60 – 10.2.95.60	10.2.95.60
62	10.2.95.61/32	10.2.95.61 – 10.2.95.61	10.2.95.61
63	10.2.95.62/32	10.2.95.62 – 10.2.95.62	10.2.95.62
64	10.2.95.63/32	10.2.95.63 – 10.2.95.63	10.2.95.63
65	10.2.95.64/32	10.2.95.64 – 10.2.95.64	10.2.95.64
66	10.2.95.65/32	10.2.95.65 – 10.2.95.65	10.2.95.65
67	10.2.95.66/32	10.2.95.66 – 10.2.95.66	10.2.95.66
68	10.2.95.67/32	10.2.95.67 – 10.2.95.67	10.2.95.67
69	10.2.95.68/32	10.2.95.68 – 10.2.95.68	10.2.95.68
70	10.2.95.69/32	10.2.95.69 – 10.2.95.69	10.2.95.69
71	10.2.95.70/32	10.2.95.70 – 10.2.95.70	10.2.95.70
72	10.2.95.71/32	10.2.95.71 – 10.2.95.71	10.2.95.71
73	10.2.95.72/32	10.2.95.72 – 10.2.95.72	10.2.95.72
74	10.2.95.73/32	10.2.95.73 – 10.2.95.73	10.2.95.73
75	10.2.95.74/32	10.2.95.74 – 10.2.95.74	10.2.95.74
76	10.2.95.75/32	10.2.95.75 – 10.2.95.75	10.2.95.75
77	10.2.95.76/32	10.2.95.76 – 10.2.95.76	10.2.95.76
78	10.2.95.77/32	10.2.95.77 – 10.2.95.77	10.2.95.77
79	10.2.95.78/32	10.2.95.78 – 10.2.95.78	10.2.95.78
80	10.2.95.79/32	10.2.95.79 – 10.2.95.79	10.2.95.79
81	10.2.95.80/32	10.2.95.80 – 10.2.95.80	10.2.95.80
82	10.2.95.81/32	10.2.95.81 – 10.2.95.81	10.2.95.81
83	10.2.95.82/32	10.2.95.82 – 10.2.95.82	10.2.95.82
84	10.2.95.83/32	10.2.95.83 – 10.2.95.83	10.2.95.83
85	10.2.95.84/32	10.2.95.84 – 10.2.95.84	10.2.95.84
86	10.2.95.85/32	10.2.95.85 – 10.2.95.85	10.2.95.85
87	10.2.95.86/32	10.2.95.86 – 10.2.95.86	10.2.95.86
88	10.2.95.87/32	10.2.95.87 – 10.2.95.87	10.2.95.87
89	10.2.95.88/32	10.2.95.88 – 10.2.95.88	10.2.95.88
90	10.2.95.89/32	10.2.95.89 – 10.2.95.89	10.2.95.89
91	10.2.95.90/32	10.2.95.90 – 10.2.95.90	10.2.95.90
92	10.2.95.91/32	10.2.95.91 – 10.2.95.91	10.2.95.91
93	10.2.95.92/32	10.2.95.92 – 10.2.95.92	10.2.95.92
94	10.2.95.93/32	10.2.95.93 – 10.2.95.93	10.2.95.93
95	10.2.95.94/32	10.2.95.94 – 10.2.95.94	10.2.95.94
96	10.2.95.95/32	10.2.95.95 – 10.2.95.95	10.2.95.95
97	10.2.95.96/32	10.2.95.96 – 10.2.95.96	10.2.95.96
98	10.2.95.97/32	10.2.95.97 – 10.2.95.97	10.2.95.97
99	10.2.95.98/32	10.2.95.98 – 10.2.95.98	10.2.95.98
100	10.2.95.99/32	10.2.95.99 – 10.2.95.99	10.2.95.99
101	10.2.95.100/32	10.2.95.100 – 10.2.95.100	10.2.95.100
102	10.2.95.101/32	10.2.95.101 – 10.2.95.101	10.2.95.101
103	10.2.95.102/32	10.2.95.102 – 10.2.95.102	10.2.95.102
104	10.2.95.103/32	10.2.95.103 – 10.2.95.103	10.2.95.103
105	10.2.95.104/32	10.2.95.104 – 10.2.95.104	10.2.95.104
106	10.2.95.105/32	10.2.95.105 – 10.2.95.105	10.2.95.105
107	10.2.95.106/32	10.2.95.106 – 10.2.95.106	10.2.95.106
108	10.2.95.107/32	10.2.95.107 – 10.2.95.107	10.2.95.107
109	10.2.95.108/32	10.2.95.108 – 10.2.95.108	10.2.95.108
110	10.2.95.109/32	10.2.95.109 – 10.2.95.109	10.2.95.109
111	10.2.95.110/32	10.2.95.110 – 10.2.95.110	10.2.95.110
112	10.2.95.111/32	10.2.95.111 – 10.2.95.111	10.2.95.111
113	10.2.95.112/32	10.2.95.112 – 10.2.95.112	10.2.95.112
114	10.2.95.113/32	10.2.95.113 – 10.2.95.113	10.2.95.113
115	10.2.95.114/32	10.2.95.114 – 10.2.95.114	10.2.95.114
116	10.2.95.115/32	10.2.95.115 – 10.2.95.115	10.2.95.115
117	10.2.95.116/32	10.2.95.116 – 10.2.95.116	10.2.95.116
118	10.2.95.117/32	10.2.95.117 – 10.2.95.117	10.2.95.117
119	10.2.95.118/32	10.2.95.118 – 10.2.95.118	10.2.95.118
120	10.2.95.119/32	10.2.95.119 – 10.2.95.119	10.2.95.119
121	10.2.95.120/32	10.2.95.120 – 10.2.95.120	10.2.95.120
122	10.2.95.121/32	10.2.95.121 – 10.2.95.121	10.2.95.121
123	10.2.95.122/32	10.2.95.122 – 10.2.95.122	10.2.95.122
124	10.2.95.123/32	10.2.95.123 – 10.2.95.123	10.2.95.123
125	10.2.95.124/32	10.2.95.124 – 10.2.95.124	10.2.95.124
126	10.2.95.125/32	10.2.95.125 – 10.2.95.125	10.2.95.125
127	10.2.95.126/32	10.2.95.126 – 10.2.95.126	10.2.95.126
128	10.2.95.127/32	10.2.95.127 – 10.2.95.127	10.2.95.127

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 →