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)10.85.63.0/24

network10.85.63.0/24

broadcast10.85.63.255

first host10.85.63.1

last host10.85.63.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.85.63.0/24

address00001010.01010101.00111111.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.01010101.00111111.00000000

broadcast00001010.01010101.00111111.11111111

green = network part, grey = host part

hex0x0a553f00

decimal173358848

reverse dns0.63.85.10.in-addr.arpa

ipv4-mapped::ffff:a55:3f00

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.85.63.0/31	10.85.63.0 – 10.85.63.1	10.85.63.1
2	10.85.63.2/31	10.85.63.2 – 10.85.63.3	10.85.63.3
3	10.85.63.4/31	10.85.63.4 – 10.85.63.5	10.85.63.5
4	10.85.63.6/31	10.85.63.6 – 10.85.63.7	10.85.63.7
5	10.85.63.8/31	10.85.63.8 – 10.85.63.9	10.85.63.9
6	10.85.63.10/31	10.85.63.10 – 10.85.63.11	10.85.63.11
7	10.85.63.12/31	10.85.63.12 – 10.85.63.13	10.85.63.13
8	10.85.63.14/31	10.85.63.14 – 10.85.63.15	10.85.63.15
9	10.85.63.16/31	10.85.63.16 – 10.85.63.17	10.85.63.17
10	10.85.63.18/31	10.85.63.18 – 10.85.63.19	10.85.63.19
11	10.85.63.20/31	10.85.63.20 – 10.85.63.21	10.85.63.21
12	10.85.63.22/31	10.85.63.22 – 10.85.63.23	10.85.63.23
13	10.85.63.24/31	10.85.63.24 – 10.85.63.25	10.85.63.25
14	10.85.63.26/31	10.85.63.26 – 10.85.63.27	10.85.63.27
15	10.85.63.28/31	10.85.63.28 – 10.85.63.29	10.85.63.29
16	10.85.63.30/31	10.85.63.30 – 10.85.63.31	10.85.63.31
17	10.85.63.32/31	10.85.63.32 – 10.85.63.33	10.85.63.33
18	10.85.63.34/31	10.85.63.34 – 10.85.63.35	10.85.63.35
19	10.85.63.36/31	10.85.63.36 – 10.85.63.37	10.85.63.37
20	10.85.63.38/31	10.85.63.38 – 10.85.63.39	10.85.63.39
21	10.85.63.40/31	10.85.63.40 – 10.85.63.41	10.85.63.41
22	10.85.63.42/31	10.85.63.42 – 10.85.63.43	10.85.63.43
23	10.85.63.44/31	10.85.63.44 – 10.85.63.45	10.85.63.45
24	10.85.63.46/31	10.85.63.46 – 10.85.63.47	10.85.63.47
25	10.85.63.48/31	10.85.63.48 – 10.85.63.49	10.85.63.49
26	10.85.63.50/31	10.85.63.50 – 10.85.63.51	10.85.63.51
27	10.85.63.52/31	10.85.63.52 – 10.85.63.53	10.85.63.53
28	10.85.63.54/31	10.85.63.54 – 10.85.63.55	10.85.63.55
29	10.85.63.56/31	10.85.63.56 – 10.85.63.57	10.85.63.57
30	10.85.63.58/31	10.85.63.58 – 10.85.63.59	10.85.63.59
31	10.85.63.60/31	10.85.63.60 – 10.85.63.61	10.85.63.61
32	10.85.63.62/31	10.85.63.62 – 10.85.63.63	10.85.63.63
33	10.85.63.64/31	10.85.63.64 – 10.85.63.65	10.85.63.65
34	10.85.63.66/31	10.85.63.66 – 10.85.63.67	10.85.63.67
35	10.85.63.68/31	10.85.63.68 – 10.85.63.69	10.85.63.69
36	10.85.63.70/31	10.85.63.70 – 10.85.63.71	10.85.63.71
37	10.85.63.72/31	10.85.63.72 – 10.85.63.73	10.85.63.73
38	10.85.63.74/31	10.85.63.74 – 10.85.63.75	10.85.63.75
39	10.85.63.76/31	10.85.63.76 – 10.85.63.77	10.85.63.77
40	10.85.63.78/31	10.85.63.78 – 10.85.63.79	10.85.63.79
41	10.85.63.80/31	10.85.63.80 – 10.85.63.81	10.85.63.81
42	10.85.63.82/31	10.85.63.82 – 10.85.63.83	10.85.63.83
43	10.85.63.84/31	10.85.63.84 – 10.85.63.85	10.85.63.85
44	10.85.63.86/31	10.85.63.86 – 10.85.63.87	10.85.63.87
45	10.85.63.88/31	10.85.63.88 – 10.85.63.89	10.85.63.89
46	10.85.63.90/31	10.85.63.90 – 10.85.63.91	10.85.63.91
47	10.85.63.92/31	10.85.63.92 – 10.85.63.93	10.85.63.93
48	10.85.63.94/31	10.85.63.94 – 10.85.63.95	10.85.63.95
49	10.85.63.96/31	10.85.63.96 – 10.85.63.97	10.85.63.97
50	10.85.63.98/31	10.85.63.98 – 10.85.63.99	10.85.63.99
51	10.85.63.100/31	10.85.63.100 – 10.85.63.101	10.85.63.101
52	10.85.63.102/31	10.85.63.102 – 10.85.63.103	10.85.63.103
53	10.85.63.104/31	10.85.63.104 – 10.85.63.105	10.85.63.105
54	10.85.63.106/31	10.85.63.106 – 10.85.63.107	10.85.63.107
55	10.85.63.108/31	10.85.63.108 – 10.85.63.109	10.85.63.109
56	10.85.63.110/31	10.85.63.110 – 10.85.63.111	10.85.63.111
57	10.85.63.112/31	10.85.63.112 – 10.85.63.113	10.85.63.113
58	10.85.63.114/31	10.85.63.114 – 10.85.63.115	10.85.63.115
59	10.85.63.116/31	10.85.63.116 – 10.85.63.117	10.85.63.117
60	10.85.63.118/31	10.85.63.118 – 10.85.63.119	10.85.63.119
61	10.85.63.120/31	10.85.63.120 – 10.85.63.121	10.85.63.121
62	10.85.63.122/31	10.85.63.122 – 10.85.63.123	10.85.63.123
63	10.85.63.124/31	10.85.63.124 – 10.85.63.125	10.85.63.125
64	10.85.63.126/31	10.85.63.126 – 10.85.63.127	10.85.63.127
65	10.85.63.128/31	10.85.63.128 – 10.85.63.129	10.85.63.129
66	10.85.63.130/31	10.85.63.130 – 10.85.63.131	10.85.63.131
67	10.85.63.132/31	10.85.63.132 – 10.85.63.133	10.85.63.133
68	10.85.63.134/31	10.85.63.134 – 10.85.63.135	10.85.63.135
69	10.85.63.136/31	10.85.63.136 – 10.85.63.137	10.85.63.137
70	10.85.63.138/31	10.85.63.138 – 10.85.63.139	10.85.63.139
71	10.85.63.140/31	10.85.63.140 – 10.85.63.141	10.85.63.141
72	10.85.63.142/31	10.85.63.142 – 10.85.63.143	10.85.63.143
73	10.85.63.144/31	10.85.63.144 – 10.85.63.145	10.85.63.145
74	10.85.63.146/31	10.85.63.146 – 10.85.63.147	10.85.63.147
75	10.85.63.148/31	10.85.63.148 – 10.85.63.149	10.85.63.149
76	10.85.63.150/31	10.85.63.150 – 10.85.63.151	10.85.63.151
77	10.85.63.152/31	10.85.63.152 – 10.85.63.153	10.85.63.153
78	10.85.63.154/31	10.85.63.154 – 10.85.63.155	10.85.63.155
79	10.85.63.156/31	10.85.63.156 – 10.85.63.157	10.85.63.157
80	10.85.63.158/31	10.85.63.158 – 10.85.63.159	10.85.63.159
81	10.85.63.160/31	10.85.63.160 – 10.85.63.161	10.85.63.161
82	10.85.63.162/31	10.85.63.162 – 10.85.63.163	10.85.63.163
83	10.85.63.164/31	10.85.63.164 – 10.85.63.165	10.85.63.165
84	10.85.63.166/31	10.85.63.166 – 10.85.63.167	10.85.63.167
85	10.85.63.168/31	10.85.63.168 – 10.85.63.169	10.85.63.169
86	10.85.63.170/31	10.85.63.170 – 10.85.63.171	10.85.63.171
87	10.85.63.172/31	10.85.63.172 – 10.85.63.173	10.85.63.173
88	10.85.63.174/31	10.85.63.174 – 10.85.63.175	10.85.63.175
89	10.85.63.176/31	10.85.63.176 – 10.85.63.177	10.85.63.177
90	10.85.63.178/31	10.85.63.178 – 10.85.63.179	10.85.63.179
91	10.85.63.180/31	10.85.63.180 – 10.85.63.181	10.85.63.181
92	10.85.63.182/31	10.85.63.182 – 10.85.63.183	10.85.63.183
93	10.85.63.184/31	10.85.63.184 – 10.85.63.185	10.85.63.185
94	10.85.63.186/31	10.85.63.186 – 10.85.63.187	10.85.63.187
95	10.85.63.188/31	10.85.63.188 – 10.85.63.189	10.85.63.189
96	10.85.63.190/31	10.85.63.190 – 10.85.63.191	10.85.63.191
97	10.85.63.192/31	10.85.63.192 – 10.85.63.193	10.85.63.193
98	10.85.63.194/31	10.85.63.194 – 10.85.63.195	10.85.63.195
99	10.85.63.196/31	10.85.63.196 – 10.85.63.197	10.85.63.197
100	10.85.63.198/31	10.85.63.198 – 10.85.63.199	10.85.63.199
101	10.85.63.200/31	10.85.63.200 – 10.85.63.201	10.85.63.201
102	10.85.63.202/31	10.85.63.202 – 10.85.63.203	10.85.63.203
103	10.85.63.204/31	10.85.63.204 – 10.85.63.205	10.85.63.205
104	10.85.63.206/31	10.85.63.206 – 10.85.63.207	10.85.63.207
105	10.85.63.208/31	10.85.63.208 – 10.85.63.209	10.85.63.209
106	10.85.63.210/31	10.85.63.210 – 10.85.63.211	10.85.63.211
107	10.85.63.212/31	10.85.63.212 – 10.85.63.213	10.85.63.213
108	10.85.63.214/31	10.85.63.214 – 10.85.63.215	10.85.63.215
109	10.85.63.216/31	10.85.63.216 – 10.85.63.217	10.85.63.217
110	10.85.63.218/31	10.85.63.218 – 10.85.63.219	10.85.63.219
111	10.85.63.220/31	10.85.63.220 – 10.85.63.221	10.85.63.221
112	10.85.63.222/31	10.85.63.222 – 10.85.63.223	10.85.63.223
113	10.85.63.224/31	10.85.63.224 – 10.85.63.225	10.85.63.225
114	10.85.63.226/31	10.85.63.226 – 10.85.63.227	10.85.63.227
115	10.85.63.228/31	10.85.63.228 – 10.85.63.229	10.85.63.229
116	10.85.63.230/31	10.85.63.230 – 10.85.63.231	10.85.63.231
117	10.85.63.232/31	10.85.63.232 – 10.85.63.233	10.85.63.233
118	10.85.63.234/31	10.85.63.234 – 10.85.63.235	10.85.63.235
119	10.85.63.236/31	10.85.63.236 – 10.85.63.237	10.85.63.237
120	10.85.63.238/31	10.85.63.238 – 10.85.63.239	10.85.63.239
121	10.85.63.240/31	10.85.63.240 – 10.85.63.241	10.85.63.241
122	10.85.63.242/31	10.85.63.242 – 10.85.63.243	10.85.63.243
123	10.85.63.244/31	10.85.63.244 – 10.85.63.245	10.85.63.245
124	10.85.63.246/31	10.85.63.246 – 10.85.63.247	10.85.63.247
125	10.85.63.248/31	10.85.63.248 – 10.85.63.249	10.85.63.249
126	10.85.63.250/31	10.85.63.250 – 10.85.63.251	10.85.63.251
127	10.85.63.252/31	10.85.63.252 – 10.85.63.253	10.85.63.253
128	10.85.63.254/31	10.85.63.254 – 10.85.63.255	10.85.63.255

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