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)10.185.44.0/25

network10.185.44.0/25

broadcast10.185.44.127

first host10.185.44.1

last host10.185.44.126

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.185.44.0/25

address00001010.10111001.00101100.00000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10111001.00101100.00000000

broadcast00001010.10111001.00101100.01111111

green = network part, grey = host part

hex0x0ab92c00

decimal179907584

reverse dns0.44.185.10.in-addr.arpa

ipv4-mapped::ffff:ab9:2c00

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.185.44.0/32	10.185.44.0 – 10.185.44.0	10.185.44.0
2	10.185.44.1/32	10.185.44.1 – 10.185.44.1	10.185.44.1
3	10.185.44.2/32	10.185.44.2 – 10.185.44.2	10.185.44.2
4	10.185.44.3/32	10.185.44.3 – 10.185.44.3	10.185.44.3
5	10.185.44.4/32	10.185.44.4 – 10.185.44.4	10.185.44.4
6	10.185.44.5/32	10.185.44.5 – 10.185.44.5	10.185.44.5
7	10.185.44.6/32	10.185.44.6 – 10.185.44.6	10.185.44.6
8	10.185.44.7/32	10.185.44.7 – 10.185.44.7	10.185.44.7
9	10.185.44.8/32	10.185.44.8 – 10.185.44.8	10.185.44.8
10	10.185.44.9/32	10.185.44.9 – 10.185.44.9	10.185.44.9
11	10.185.44.10/32	10.185.44.10 – 10.185.44.10	10.185.44.10
12	10.185.44.11/32	10.185.44.11 – 10.185.44.11	10.185.44.11
13	10.185.44.12/32	10.185.44.12 – 10.185.44.12	10.185.44.12
14	10.185.44.13/32	10.185.44.13 – 10.185.44.13	10.185.44.13
15	10.185.44.14/32	10.185.44.14 – 10.185.44.14	10.185.44.14
16	10.185.44.15/32	10.185.44.15 – 10.185.44.15	10.185.44.15
17	10.185.44.16/32	10.185.44.16 – 10.185.44.16	10.185.44.16
18	10.185.44.17/32	10.185.44.17 – 10.185.44.17	10.185.44.17
19	10.185.44.18/32	10.185.44.18 – 10.185.44.18	10.185.44.18
20	10.185.44.19/32	10.185.44.19 – 10.185.44.19	10.185.44.19
21	10.185.44.20/32	10.185.44.20 – 10.185.44.20	10.185.44.20
22	10.185.44.21/32	10.185.44.21 – 10.185.44.21	10.185.44.21
23	10.185.44.22/32	10.185.44.22 – 10.185.44.22	10.185.44.22
24	10.185.44.23/32	10.185.44.23 – 10.185.44.23	10.185.44.23
25	10.185.44.24/32	10.185.44.24 – 10.185.44.24	10.185.44.24
26	10.185.44.25/32	10.185.44.25 – 10.185.44.25	10.185.44.25
27	10.185.44.26/32	10.185.44.26 – 10.185.44.26	10.185.44.26
28	10.185.44.27/32	10.185.44.27 – 10.185.44.27	10.185.44.27
29	10.185.44.28/32	10.185.44.28 – 10.185.44.28	10.185.44.28
30	10.185.44.29/32	10.185.44.29 – 10.185.44.29	10.185.44.29
31	10.185.44.30/32	10.185.44.30 – 10.185.44.30	10.185.44.30
32	10.185.44.31/32	10.185.44.31 – 10.185.44.31	10.185.44.31
33	10.185.44.32/32	10.185.44.32 – 10.185.44.32	10.185.44.32
34	10.185.44.33/32	10.185.44.33 – 10.185.44.33	10.185.44.33
35	10.185.44.34/32	10.185.44.34 – 10.185.44.34	10.185.44.34
36	10.185.44.35/32	10.185.44.35 – 10.185.44.35	10.185.44.35
37	10.185.44.36/32	10.185.44.36 – 10.185.44.36	10.185.44.36
38	10.185.44.37/32	10.185.44.37 – 10.185.44.37	10.185.44.37
39	10.185.44.38/32	10.185.44.38 – 10.185.44.38	10.185.44.38
40	10.185.44.39/32	10.185.44.39 – 10.185.44.39	10.185.44.39
41	10.185.44.40/32	10.185.44.40 – 10.185.44.40	10.185.44.40
42	10.185.44.41/32	10.185.44.41 – 10.185.44.41	10.185.44.41
43	10.185.44.42/32	10.185.44.42 – 10.185.44.42	10.185.44.42
44	10.185.44.43/32	10.185.44.43 – 10.185.44.43	10.185.44.43
45	10.185.44.44/32	10.185.44.44 – 10.185.44.44	10.185.44.44
46	10.185.44.45/32	10.185.44.45 – 10.185.44.45	10.185.44.45
47	10.185.44.46/32	10.185.44.46 – 10.185.44.46	10.185.44.46
48	10.185.44.47/32	10.185.44.47 – 10.185.44.47	10.185.44.47
49	10.185.44.48/32	10.185.44.48 – 10.185.44.48	10.185.44.48
50	10.185.44.49/32	10.185.44.49 – 10.185.44.49	10.185.44.49
51	10.185.44.50/32	10.185.44.50 – 10.185.44.50	10.185.44.50
52	10.185.44.51/32	10.185.44.51 – 10.185.44.51	10.185.44.51
53	10.185.44.52/32	10.185.44.52 – 10.185.44.52	10.185.44.52
54	10.185.44.53/32	10.185.44.53 – 10.185.44.53	10.185.44.53
55	10.185.44.54/32	10.185.44.54 – 10.185.44.54	10.185.44.54
56	10.185.44.55/32	10.185.44.55 – 10.185.44.55	10.185.44.55
57	10.185.44.56/32	10.185.44.56 – 10.185.44.56	10.185.44.56
58	10.185.44.57/32	10.185.44.57 – 10.185.44.57	10.185.44.57
59	10.185.44.58/32	10.185.44.58 – 10.185.44.58	10.185.44.58
60	10.185.44.59/32	10.185.44.59 – 10.185.44.59	10.185.44.59
61	10.185.44.60/32	10.185.44.60 – 10.185.44.60	10.185.44.60
62	10.185.44.61/32	10.185.44.61 – 10.185.44.61	10.185.44.61
63	10.185.44.62/32	10.185.44.62 – 10.185.44.62	10.185.44.62
64	10.185.44.63/32	10.185.44.63 – 10.185.44.63	10.185.44.63
65	10.185.44.64/32	10.185.44.64 – 10.185.44.64	10.185.44.64
66	10.185.44.65/32	10.185.44.65 – 10.185.44.65	10.185.44.65
67	10.185.44.66/32	10.185.44.66 – 10.185.44.66	10.185.44.66
68	10.185.44.67/32	10.185.44.67 – 10.185.44.67	10.185.44.67
69	10.185.44.68/32	10.185.44.68 – 10.185.44.68	10.185.44.68
70	10.185.44.69/32	10.185.44.69 – 10.185.44.69	10.185.44.69
71	10.185.44.70/32	10.185.44.70 – 10.185.44.70	10.185.44.70
72	10.185.44.71/32	10.185.44.71 – 10.185.44.71	10.185.44.71
73	10.185.44.72/32	10.185.44.72 – 10.185.44.72	10.185.44.72
74	10.185.44.73/32	10.185.44.73 – 10.185.44.73	10.185.44.73
75	10.185.44.74/32	10.185.44.74 – 10.185.44.74	10.185.44.74
76	10.185.44.75/32	10.185.44.75 – 10.185.44.75	10.185.44.75
77	10.185.44.76/32	10.185.44.76 – 10.185.44.76	10.185.44.76
78	10.185.44.77/32	10.185.44.77 – 10.185.44.77	10.185.44.77
79	10.185.44.78/32	10.185.44.78 – 10.185.44.78	10.185.44.78
80	10.185.44.79/32	10.185.44.79 – 10.185.44.79	10.185.44.79
81	10.185.44.80/32	10.185.44.80 – 10.185.44.80	10.185.44.80
82	10.185.44.81/32	10.185.44.81 – 10.185.44.81	10.185.44.81
83	10.185.44.82/32	10.185.44.82 – 10.185.44.82	10.185.44.82
84	10.185.44.83/32	10.185.44.83 – 10.185.44.83	10.185.44.83
85	10.185.44.84/32	10.185.44.84 – 10.185.44.84	10.185.44.84
86	10.185.44.85/32	10.185.44.85 – 10.185.44.85	10.185.44.85
87	10.185.44.86/32	10.185.44.86 – 10.185.44.86	10.185.44.86
88	10.185.44.87/32	10.185.44.87 – 10.185.44.87	10.185.44.87
89	10.185.44.88/32	10.185.44.88 – 10.185.44.88	10.185.44.88
90	10.185.44.89/32	10.185.44.89 – 10.185.44.89	10.185.44.89
91	10.185.44.90/32	10.185.44.90 – 10.185.44.90	10.185.44.90
92	10.185.44.91/32	10.185.44.91 – 10.185.44.91	10.185.44.91
93	10.185.44.92/32	10.185.44.92 – 10.185.44.92	10.185.44.92
94	10.185.44.93/32	10.185.44.93 – 10.185.44.93	10.185.44.93
95	10.185.44.94/32	10.185.44.94 – 10.185.44.94	10.185.44.94
96	10.185.44.95/32	10.185.44.95 – 10.185.44.95	10.185.44.95
97	10.185.44.96/32	10.185.44.96 – 10.185.44.96	10.185.44.96
98	10.185.44.97/32	10.185.44.97 – 10.185.44.97	10.185.44.97
99	10.185.44.98/32	10.185.44.98 – 10.185.44.98	10.185.44.98
100	10.185.44.99/32	10.185.44.99 – 10.185.44.99	10.185.44.99
101	10.185.44.100/32	10.185.44.100 – 10.185.44.100	10.185.44.100
102	10.185.44.101/32	10.185.44.101 – 10.185.44.101	10.185.44.101
103	10.185.44.102/32	10.185.44.102 – 10.185.44.102	10.185.44.102
104	10.185.44.103/32	10.185.44.103 – 10.185.44.103	10.185.44.103
105	10.185.44.104/32	10.185.44.104 – 10.185.44.104	10.185.44.104
106	10.185.44.105/32	10.185.44.105 – 10.185.44.105	10.185.44.105
107	10.185.44.106/32	10.185.44.106 – 10.185.44.106	10.185.44.106
108	10.185.44.107/32	10.185.44.107 – 10.185.44.107	10.185.44.107
109	10.185.44.108/32	10.185.44.108 – 10.185.44.108	10.185.44.108
110	10.185.44.109/32	10.185.44.109 – 10.185.44.109	10.185.44.109
111	10.185.44.110/32	10.185.44.110 – 10.185.44.110	10.185.44.110
112	10.185.44.111/32	10.185.44.111 – 10.185.44.111	10.185.44.111
113	10.185.44.112/32	10.185.44.112 – 10.185.44.112	10.185.44.112
114	10.185.44.113/32	10.185.44.113 – 10.185.44.113	10.185.44.113
115	10.185.44.114/32	10.185.44.114 – 10.185.44.114	10.185.44.114
116	10.185.44.115/32	10.185.44.115 – 10.185.44.115	10.185.44.115
117	10.185.44.116/32	10.185.44.116 – 10.185.44.116	10.185.44.116
118	10.185.44.117/32	10.185.44.117 – 10.185.44.117	10.185.44.117
119	10.185.44.118/32	10.185.44.118 – 10.185.44.118	10.185.44.118
120	10.185.44.119/32	10.185.44.119 – 10.185.44.119	10.185.44.119
121	10.185.44.120/32	10.185.44.120 – 10.185.44.120	10.185.44.120
122	10.185.44.121/32	10.185.44.121 – 10.185.44.121	10.185.44.121
123	10.185.44.122/32	10.185.44.122 – 10.185.44.122	10.185.44.122
124	10.185.44.123/32	10.185.44.123 – 10.185.44.123	10.185.44.123
125	10.185.44.124/32	10.185.44.124 – 10.185.44.124	10.185.44.124
126	10.185.44.125/32	10.185.44.125 – 10.185.44.125	10.185.44.125
127	10.185.44.126/32	10.185.44.126 – 10.185.44.126	10.185.44.126
128	10.185.44.127/32	10.185.44.127 – 10.185.44.127	10.185.44.127

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 →