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)10.63.60.0/23

network10.63.60.0/23

broadcast10.63.61.255

first host10.63.60.1

last host10.63.61.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.63.60.0/23

address00001010.00111111.00111100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00111111.00111100.00000000

broadcast00001010.00111111.00111101.11111111

green = network part, grey = host part

hex0x0a3f3c00

decimal171916288

reverse dns0.60.63.10.in-addr.arpa

ipv4-mapped::ffff:a3f:3c00

/23 split into /30 · 128 subnets

close ×

#	network	host range	broadcast
1	10.63.60.0/30	10.63.60.1 – 10.63.60.2	10.63.60.3
2	10.63.60.4/30	10.63.60.5 – 10.63.60.6	10.63.60.7
3	10.63.60.8/30	10.63.60.9 – 10.63.60.10	10.63.60.11
4	10.63.60.12/30	10.63.60.13 – 10.63.60.14	10.63.60.15
5	10.63.60.16/30	10.63.60.17 – 10.63.60.18	10.63.60.19
6	10.63.60.20/30	10.63.60.21 – 10.63.60.22	10.63.60.23
7	10.63.60.24/30	10.63.60.25 – 10.63.60.26	10.63.60.27
8	10.63.60.28/30	10.63.60.29 – 10.63.60.30	10.63.60.31
9	10.63.60.32/30	10.63.60.33 – 10.63.60.34	10.63.60.35
10	10.63.60.36/30	10.63.60.37 – 10.63.60.38	10.63.60.39
11	10.63.60.40/30	10.63.60.41 – 10.63.60.42	10.63.60.43
12	10.63.60.44/30	10.63.60.45 – 10.63.60.46	10.63.60.47
13	10.63.60.48/30	10.63.60.49 – 10.63.60.50	10.63.60.51
14	10.63.60.52/30	10.63.60.53 – 10.63.60.54	10.63.60.55
15	10.63.60.56/30	10.63.60.57 – 10.63.60.58	10.63.60.59
16	10.63.60.60/30	10.63.60.61 – 10.63.60.62	10.63.60.63
17	10.63.60.64/30	10.63.60.65 – 10.63.60.66	10.63.60.67
18	10.63.60.68/30	10.63.60.69 – 10.63.60.70	10.63.60.71
19	10.63.60.72/30	10.63.60.73 – 10.63.60.74	10.63.60.75
20	10.63.60.76/30	10.63.60.77 – 10.63.60.78	10.63.60.79
21	10.63.60.80/30	10.63.60.81 – 10.63.60.82	10.63.60.83
22	10.63.60.84/30	10.63.60.85 – 10.63.60.86	10.63.60.87
23	10.63.60.88/30	10.63.60.89 – 10.63.60.90	10.63.60.91
24	10.63.60.92/30	10.63.60.93 – 10.63.60.94	10.63.60.95
25	10.63.60.96/30	10.63.60.97 – 10.63.60.98	10.63.60.99
26	10.63.60.100/30	10.63.60.101 – 10.63.60.102	10.63.60.103
27	10.63.60.104/30	10.63.60.105 – 10.63.60.106	10.63.60.107
28	10.63.60.108/30	10.63.60.109 – 10.63.60.110	10.63.60.111
29	10.63.60.112/30	10.63.60.113 – 10.63.60.114	10.63.60.115
30	10.63.60.116/30	10.63.60.117 – 10.63.60.118	10.63.60.119
31	10.63.60.120/30	10.63.60.121 – 10.63.60.122	10.63.60.123
32	10.63.60.124/30	10.63.60.125 – 10.63.60.126	10.63.60.127
33	10.63.60.128/30	10.63.60.129 – 10.63.60.130	10.63.60.131
34	10.63.60.132/30	10.63.60.133 – 10.63.60.134	10.63.60.135
35	10.63.60.136/30	10.63.60.137 – 10.63.60.138	10.63.60.139
36	10.63.60.140/30	10.63.60.141 – 10.63.60.142	10.63.60.143
37	10.63.60.144/30	10.63.60.145 – 10.63.60.146	10.63.60.147
38	10.63.60.148/30	10.63.60.149 – 10.63.60.150	10.63.60.151
39	10.63.60.152/30	10.63.60.153 – 10.63.60.154	10.63.60.155
40	10.63.60.156/30	10.63.60.157 – 10.63.60.158	10.63.60.159
41	10.63.60.160/30	10.63.60.161 – 10.63.60.162	10.63.60.163
42	10.63.60.164/30	10.63.60.165 – 10.63.60.166	10.63.60.167
43	10.63.60.168/30	10.63.60.169 – 10.63.60.170	10.63.60.171
44	10.63.60.172/30	10.63.60.173 – 10.63.60.174	10.63.60.175
45	10.63.60.176/30	10.63.60.177 – 10.63.60.178	10.63.60.179
46	10.63.60.180/30	10.63.60.181 – 10.63.60.182	10.63.60.183
47	10.63.60.184/30	10.63.60.185 – 10.63.60.186	10.63.60.187
48	10.63.60.188/30	10.63.60.189 – 10.63.60.190	10.63.60.191
49	10.63.60.192/30	10.63.60.193 – 10.63.60.194	10.63.60.195
50	10.63.60.196/30	10.63.60.197 – 10.63.60.198	10.63.60.199
51	10.63.60.200/30	10.63.60.201 – 10.63.60.202	10.63.60.203
52	10.63.60.204/30	10.63.60.205 – 10.63.60.206	10.63.60.207
53	10.63.60.208/30	10.63.60.209 – 10.63.60.210	10.63.60.211
54	10.63.60.212/30	10.63.60.213 – 10.63.60.214	10.63.60.215
55	10.63.60.216/30	10.63.60.217 – 10.63.60.218	10.63.60.219
56	10.63.60.220/30	10.63.60.221 – 10.63.60.222	10.63.60.223
57	10.63.60.224/30	10.63.60.225 – 10.63.60.226	10.63.60.227
58	10.63.60.228/30	10.63.60.229 – 10.63.60.230	10.63.60.231
59	10.63.60.232/30	10.63.60.233 – 10.63.60.234	10.63.60.235
60	10.63.60.236/30	10.63.60.237 – 10.63.60.238	10.63.60.239
61	10.63.60.240/30	10.63.60.241 – 10.63.60.242	10.63.60.243
62	10.63.60.244/30	10.63.60.245 – 10.63.60.246	10.63.60.247
63	10.63.60.248/30	10.63.60.249 – 10.63.60.250	10.63.60.251
64	10.63.60.252/30	10.63.60.253 – 10.63.60.254	10.63.60.255
65	10.63.61.0/30	10.63.61.1 – 10.63.61.2	10.63.61.3
66	10.63.61.4/30	10.63.61.5 – 10.63.61.6	10.63.61.7
67	10.63.61.8/30	10.63.61.9 – 10.63.61.10	10.63.61.11
68	10.63.61.12/30	10.63.61.13 – 10.63.61.14	10.63.61.15
69	10.63.61.16/30	10.63.61.17 – 10.63.61.18	10.63.61.19
70	10.63.61.20/30	10.63.61.21 – 10.63.61.22	10.63.61.23
71	10.63.61.24/30	10.63.61.25 – 10.63.61.26	10.63.61.27
72	10.63.61.28/30	10.63.61.29 – 10.63.61.30	10.63.61.31
73	10.63.61.32/30	10.63.61.33 – 10.63.61.34	10.63.61.35
74	10.63.61.36/30	10.63.61.37 – 10.63.61.38	10.63.61.39
75	10.63.61.40/30	10.63.61.41 – 10.63.61.42	10.63.61.43
76	10.63.61.44/30	10.63.61.45 – 10.63.61.46	10.63.61.47
77	10.63.61.48/30	10.63.61.49 – 10.63.61.50	10.63.61.51
78	10.63.61.52/30	10.63.61.53 – 10.63.61.54	10.63.61.55
79	10.63.61.56/30	10.63.61.57 – 10.63.61.58	10.63.61.59
80	10.63.61.60/30	10.63.61.61 – 10.63.61.62	10.63.61.63
81	10.63.61.64/30	10.63.61.65 – 10.63.61.66	10.63.61.67
82	10.63.61.68/30	10.63.61.69 – 10.63.61.70	10.63.61.71
83	10.63.61.72/30	10.63.61.73 – 10.63.61.74	10.63.61.75
84	10.63.61.76/30	10.63.61.77 – 10.63.61.78	10.63.61.79
85	10.63.61.80/30	10.63.61.81 – 10.63.61.82	10.63.61.83
86	10.63.61.84/30	10.63.61.85 – 10.63.61.86	10.63.61.87
87	10.63.61.88/30	10.63.61.89 – 10.63.61.90	10.63.61.91
88	10.63.61.92/30	10.63.61.93 – 10.63.61.94	10.63.61.95
89	10.63.61.96/30	10.63.61.97 – 10.63.61.98	10.63.61.99
90	10.63.61.100/30	10.63.61.101 – 10.63.61.102	10.63.61.103
91	10.63.61.104/30	10.63.61.105 – 10.63.61.106	10.63.61.107
92	10.63.61.108/30	10.63.61.109 – 10.63.61.110	10.63.61.111
93	10.63.61.112/30	10.63.61.113 – 10.63.61.114	10.63.61.115
94	10.63.61.116/30	10.63.61.117 – 10.63.61.118	10.63.61.119
95	10.63.61.120/30	10.63.61.121 – 10.63.61.122	10.63.61.123
96	10.63.61.124/30	10.63.61.125 – 10.63.61.126	10.63.61.127
97	10.63.61.128/30	10.63.61.129 – 10.63.61.130	10.63.61.131
98	10.63.61.132/30	10.63.61.133 – 10.63.61.134	10.63.61.135
99	10.63.61.136/30	10.63.61.137 – 10.63.61.138	10.63.61.139
100	10.63.61.140/30	10.63.61.141 – 10.63.61.142	10.63.61.143
101	10.63.61.144/30	10.63.61.145 – 10.63.61.146	10.63.61.147
102	10.63.61.148/30	10.63.61.149 – 10.63.61.150	10.63.61.151
103	10.63.61.152/30	10.63.61.153 – 10.63.61.154	10.63.61.155
104	10.63.61.156/30	10.63.61.157 – 10.63.61.158	10.63.61.159
105	10.63.61.160/30	10.63.61.161 – 10.63.61.162	10.63.61.163
106	10.63.61.164/30	10.63.61.165 – 10.63.61.166	10.63.61.167
107	10.63.61.168/30	10.63.61.169 – 10.63.61.170	10.63.61.171
108	10.63.61.172/30	10.63.61.173 – 10.63.61.174	10.63.61.175
109	10.63.61.176/30	10.63.61.177 – 10.63.61.178	10.63.61.179
110	10.63.61.180/30	10.63.61.181 – 10.63.61.182	10.63.61.183
111	10.63.61.184/30	10.63.61.185 – 10.63.61.186	10.63.61.187
112	10.63.61.188/30	10.63.61.189 – 10.63.61.190	10.63.61.191
113	10.63.61.192/30	10.63.61.193 – 10.63.61.194	10.63.61.195
114	10.63.61.196/30	10.63.61.197 – 10.63.61.198	10.63.61.199
115	10.63.61.200/30	10.63.61.201 – 10.63.61.202	10.63.61.203
116	10.63.61.204/30	10.63.61.205 – 10.63.61.206	10.63.61.207
117	10.63.61.208/30	10.63.61.209 – 10.63.61.210	10.63.61.211
118	10.63.61.212/30	10.63.61.213 – 10.63.61.214	10.63.61.215
119	10.63.61.216/30	10.63.61.217 – 10.63.61.218	10.63.61.219
120	10.63.61.220/30	10.63.61.221 – 10.63.61.222	10.63.61.223
121	10.63.61.224/30	10.63.61.225 – 10.63.61.226	10.63.61.227
122	10.63.61.228/30	10.63.61.229 – 10.63.61.230	10.63.61.231
123	10.63.61.232/30	10.63.61.233 – 10.63.61.234	10.63.61.235
124	10.63.61.236/30	10.63.61.237 – 10.63.61.238	10.63.61.239
125	10.63.61.240/30	10.63.61.241 – 10.63.61.242	10.63.61.243
126	10.63.61.244/30	10.63.61.245 – 10.63.61.246	10.63.61.247
127	10.63.61.248/30	10.63.61.249 – 10.63.61.250	10.63.61.251
128	10.63.61.252/30	10.63.61.253 – 10.63.61.254	10.63.61.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →