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)10.45.233.0/24

network10.45.233.0/24

broadcast10.45.233.255

first host10.45.233.1

last host10.45.233.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.45.233.0/24

address00001010.00101101.11101001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00101101.11101001.00000000

broadcast00001010.00101101.11101001.11111111

green = network part, grey = host part

hex0x0a2de900

decimal170780928

reverse dns0.233.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:e900

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.45.233.0/31	10.45.233.0 – 10.45.233.1	10.45.233.1
2	10.45.233.2/31	10.45.233.2 – 10.45.233.3	10.45.233.3
3	10.45.233.4/31	10.45.233.4 – 10.45.233.5	10.45.233.5
4	10.45.233.6/31	10.45.233.6 – 10.45.233.7	10.45.233.7
5	10.45.233.8/31	10.45.233.8 – 10.45.233.9	10.45.233.9
6	10.45.233.10/31	10.45.233.10 – 10.45.233.11	10.45.233.11
7	10.45.233.12/31	10.45.233.12 – 10.45.233.13	10.45.233.13
8	10.45.233.14/31	10.45.233.14 – 10.45.233.15	10.45.233.15
9	10.45.233.16/31	10.45.233.16 – 10.45.233.17	10.45.233.17
10	10.45.233.18/31	10.45.233.18 – 10.45.233.19	10.45.233.19
11	10.45.233.20/31	10.45.233.20 – 10.45.233.21	10.45.233.21
12	10.45.233.22/31	10.45.233.22 – 10.45.233.23	10.45.233.23
13	10.45.233.24/31	10.45.233.24 – 10.45.233.25	10.45.233.25
14	10.45.233.26/31	10.45.233.26 – 10.45.233.27	10.45.233.27
15	10.45.233.28/31	10.45.233.28 – 10.45.233.29	10.45.233.29
16	10.45.233.30/31	10.45.233.30 – 10.45.233.31	10.45.233.31
17	10.45.233.32/31	10.45.233.32 – 10.45.233.33	10.45.233.33
18	10.45.233.34/31	10.45.233.34 – 10.45.233.35	10.45.233.35
19	10.45.233.36/31	10.45.233.36 – 10.45.233.37	10.45.233.37
20	10.45.233.38/31	10.45.233.38 – 10.45.233.39	10.45.233.39
21	10.45.233.40/31	10.45.233.40 – 10.45.233.41	10.45.233.41
22	10.45.233.42/31	10.45.233.42 – 10.45.233.43	10.45.233.43
23	10.45.233.44/31	10.45.233.44 – 10.45.233.45	10.45.233.45
24	10.45.233.46/31	10.45.233.46 – 10.45.233.47	10.45.233.47
25	10.45.233.48/31	10.45.233.48 – 10.45.233.49	10.45.233.49
26	10.45.233.50/31	10.45.233.50 – 10.45.233.51	10.45.233.51
27	10.45.233.52/31	10.45.233.52 – 10.45.233.53	10.45.233.53
28	10.45.233.54/31	10.45.233.54 – 10.45.233.55	10.45.233.55
29	10.45.233.56/31	10.45.233.56 – 10.45.233.57	10.45.233.57
30	10.45.233.58/31	10.45.233.58 – 10.45.233.59	10.45.233.59
31	10.45.233.60/31	10.45.233.60 – 10.45.233.61	10.45.233.61
32	10.45.233.62/31	10.45.233.62 – 10.45.233.63	10.45.233.63
33	10.45.233.64/31	10.45.233.64 – 10.45.233.65	10.45.233.65
34	10.45.233.66/31	10.45.233.66 – 10.45.233.67	10.45.233.67
35	10.45.233.68/31	10.45.233.68 – 10.45.233.69	10.45.233.69
36	10.45.233.70/31	10.45.233.70 – 10.45.233.71	10.45.233.71
37	10.45.233.72/31	10.45.233.72 – 10.45.233.73	10.45.233.73
38	10.45.233.74/31	10.45.233.74 – 10.45.233.75	10.45.233.75
39	10.45.233.76/31	10.45.233.76 – 10.45.233.77	10.45.233.77
40	10.45.233.78/31	10.45.233.78 – 10.45.233.79	10.45.233.79
41	10.45.233.80/31	10.45.233.80 – 10.45.233.81	10.45.233.81
42	10.45.233.82/31	10.45.233.82 – 10.45.233.83	10.45.233.83
43	10.45.233.84/31	10.45.233.84 – 10.45.233.85	10.45.233.85
44	10.45.233.86/31	10.45.233.86 – 10.45.233.87	10.45.233.87
45	10.45.233.88/31	10.45.233.88 – 10.45.233.89	10.45.233.89
46	10.45.233.90/31	10.45.233.90 – 10.45.233.91	10.45.233.91
47	10.45.233.92/31	10.45.233.92 – 10.45.233.93	10.45.233.93
48	10.45.233.94/31	10.45.233.94 – 10.45.233.95	10.45.233.95
49	10.45.233.96/31	10.45.233.96 – 10.45.233.97	10.45.233.97
50	10.45.233.98/31	10.45.233.98 – 10.45.233.99	10.45.233.99
51	10.45.233.100/31	10.45.233.100 – 10.45.233.101	10.45.233.101
52	10.45.233.102/31	10.45.233.102 – 10.45.233.103	10.45.233.103
53	10.45.233.104/31	10.45.233.104 – 10.45.233.105	10.45.233.105
54	10.45.233.106/31	10.45.233.106 – 10.45.233.107	10.45.233.107
55	10.45.233.108/31	10.45.233.108 – 10.45.233.109	10.45.233.109
56	10.45.233.110/31	10.45.233.110 – 10.45.233.111	10.45.233.111
57	10.45.233.112/31	10.45.233.112 – 10.45.233.113	10.45.233.113
58	10.45.233.114/31	10.45.233.114 – 10.45.233.115	10.45.233.115
59	10.45.233.116/31	10.45.233.116 – 10.45.233.117	10.45.233.117
60	10.45.233.118/31	10.45.233.118 – 10.45.233.119	10.45.233.119
61	10.45.233.120/31	10.45.233.120 – 10.45.233.121	10.45.233.121
62	10.45.233.122/31	10.45.233.122 – 10.45.233.123	10.45.233.123
63	10.45.233.124/31	10.45.233.124 – 10.45.233.125	10.45.233.125
64	10.45.233.126/31	10.45.233.126 – 10.45.233.127	10.45.233.127
65	10.45.233.128/31	10.45.233.128 – 10.45.233.129	10.45.233.129
66	10.45.233.130/31	10.45.233.130 – 10.45.233.131	10.45.233.131
67	10.45.233.132/31	10.45.233.132 – 10.45.233.133	10.45.233.133
68	10.45.233.134/31	10.45.233.134 – 10.45.233.135	10.45.233.135
69	10.45.233.136/31	10.45.233.136 – 10.45.233.137	10.45.233.137
70	10.45.233.138/31	10.45.233.138 – 10.45.233.139	10.45.233.139
71	10.45.233.140/31	10.45.233.140 – 10.45.233.141	10.45.233.141
72	10.45.233.142/31	10.45.233.142 – 10.45.233.143	10.45.233.143
73	10.45.233.144/31	10.45.233.144 – 10.45.233.145	10.45.233.145
74	10.45.233.146/31	10.45.233.146 – 10.45.233.147	10.45.233.147
75	10.45.233.148/31	10.45.233.148 – 10.45.233.149	10.45.233.149
76	10.45.233.150/31	10.45.233.150 – 10.45.233.151	10.45.233.151
77	10.45.233.152/31	10.45.233.152 – 10.45.233.153	10.45.233.153
78	10.45.233.154/31	10.45.233.154 – 10.45.233.155	10.45.233.155
79	10.45.233.156/31	10.45.233.156 – 10.45.233.157	10.45.233.157
80	10.45.233.158/31	10.45.233.158 – 10.45.233.159	10.45.233.159
81	10.45.233.160/31	10.45.233.160 – 10.45.233.161	10.45.233.161
82	10.45.233.162/31	10.45.233.162 – 10.45.233.163	10.45.233.163
83	10.45.233.164/31	10.45.233.164 – 10.45.233.165	10.45.233.165
84	10.45.233.166/31	10.45.233.166 – 10.45.233.167	10.45.233.167
85	10.45.233.168/31	10.45.233.168 – 10.45.233.169	10.45.233.169
86	10.45.233.170/31	10.45.233.170 – 10.45.233.171	10.45.233.171
87	10.45.233.172/31	10.45.233.172 – 10.45.233.173	10.45.233.173
88	10.45.233.174/31	10.45.233.174 – 10.45.233.175	10.45.233.175
89	10.45.233.176/31	10.45.233.176 – 10.45.233.177	10.45.233.177
90	10.45.233.178/31	10.45.233.178 – 10.45.233.179	10.45.233.179
91	10.45.233.180/31	10.45.233.180 – 10.45.233.181	10.45.233.181
92	10.45.233.182/31	10.45.233.182 – 10.45.233.183	10.45.233.183
93	10.45.233.184/31	10.45.233.184 – 10.45.233.185	10.45.233.185
94	10.45.233.186/31	10.45.233.186 – 10.45.233.187	10.45.233.187
95	10.45.233.188/31	10.45.233.188 – 10.45.233.189	10.45.233.189
96	10.45.233.190/31	10.45.233.190 – 10.45.233.191	10.45.233.191
97	10.45.233.192/31	10.45.233.192 – 10.45.233.193	10.45.233.193
98	10.45.233.194/31	10.45.233.194 – 10.45.233.195	10.45.233.195
99	10.45.233.196/31	10.45.233.196 – 10.45.233.197	10.45.233.197
100	10.45.233.198/31	10.45.233.198 – 10.45.233.199	10.45.233.199
101	10.45.233.200/31	10.45.233.200 – 10.45.233.201	10.45.233.201
102	10.45.233.202/31	10.45.233.202 – 10.45.233.203	10.45.233.203
103	10.45.233.204/31	10.45.233.204 – 10.45.233.205	10.45.233.205
104	10.45.233.206/31	10.45.233.206 – 10.45.233.207	10.45.233.207
105	10.45.233.208/31	10.45.233.208 – 10.45.233.209	10.45.233.209
106	10.45.233.210/31	10.45.233.210 – 10.45.233.211	10.45.233.211
107	10.45.233.212/31	10.45.233.212 – 10.45.233.213	10.45.233.213
108	10.45.233.214/31	10.45.233.214 – 10.45.233.215	10.45.233.215
109	10.45.233.216/31	10.45.233.216 – 10.45.233.217	10.45.233.217
110	10.45.233.218/31	10.45.233.218 – 10.45.233.219	10.45.233.219
111	10.45.233.220/31	10.45.233.220 – 10.45.233.221	10.45.233.221
112	10.45.233.222/31	10.45.233.222 – 10.45.233.223	10.45.233.223
113	10.45.233.224/31	10.45.233.224 – 10.45.233.225	10.45.233.225
114	10.45.233.226/31	10.45.233.226 – 10.45.233.227	10.45.233.227
115	10.45.233.228/31	10.45.233.228 – 10.45.233.229	10.45.233.229
116	10.45.233.230/31	10.45.233.230 – 10.45.233.231	10.45.233.231
117	10.45.233.232/31	10.45.233.232 – 10.45.233.233	10.45.233.233
118	10.45.233.234/31	10.45.233.234 – 10.45.233.235	10.45.233.235
119	10.45.233.236/31	10.45.233.236 – 10.45.233.237	10.45.233.237
120	10.45.233.238/31	10.45.233.238 – 10.45.233.239	10.45.233.239
121	10.45.233.240/31	10.45.233.240 – 10.45.233.241	10.45.233.241
122	10.45.233.242/31	10.45.233.242 – 10.45.233.243	10.45.233.243
123	10.45.233.244/31	10.45.233.244 – 10.45.233.245	10.45.233.245
124	10.45.233.246/31	10.45.233.246 – 10.45.233.247	10.45.233.247
125	10.45.233.248/31	10.45.233.248 – 10.45.233.249	10.45.233.249
126	10.45.233.250/31	10.45.233.250 – 10.45.233.251	10.45.233.251
127	10.45.233.252/31	10.45.233.252 – 10.45.233.253	10.45.233.253
128	10.45.233.254/31	10.45.233.254 – 10.45.233.255	10.45.233.255

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 →