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)10.2.153.0/24

network10.2.153.0/24

broadcast10.2.153.255

first host10.2.153.1

last host10.2.153.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.153.0/24

address00001010.00000010.10011001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.10011001.00000000

broadcast00001010.00000010.10011001.11111111

green = network part, grey = host part

hex0x0a029900

decimal167942400

reverse dns0.153.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9900

/24 split into /31 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.153.0/31	10.2.153.0 – 10.2.153.1	10.2.153.1
2	10.2.153.2/31	10.2.153.2 – 10.2.153.3	10.2.153.3
3	10.2.153.4/31	10.2.153.4 – 10.2.153.5	10.2.153.5
4	10.2.153.6/31	10.2.153.6 – 10.2.153.7	10.2.153.7
5	10.2.153.8/31	10.2.153.8 – 10.2.153.9	10.2.153.9
6	10.2.153.10/31	10.2.153.10 – 10.2.153.11	10.2.153.11
7	10.2.153.12/31	10.2.153.12 – 10.2.153.13	10.2.153.13
8	10.2.153.14/31	10.2.153.14 – 10.2.153.15	10.2.153.15
9	10.2.153.16/31	10.2.153.16 – 10.2.153.17	10.2.153.17
10	10.2.153.18/31	10.2.153.18 – 10.2.153.19	10.2.153.19
11	10.2.153.20/31	10.2.153.20 – 10.2.153.21	10.2.153.21
12	10.2.153.22/31	10.2.153.22 – 10.2.153.23	10.2.153.23
13	10.2.153.24/31	10.2.153.24 – 10.2.153.25	10.2.153.25
14	10.2.153.26/31	10.2.153.26 – 10.2.153.27	10.2.153.27
15	10.2.153.28/31	10.2.153.28 – 10.2.153.29	10.2.153.29
16	10.2.153.30/31	10.2.153.30 – 10.2.153.31	10.2.153.31
17	10.2.153.32/31	10.2.153.32 – 10.2.153.33	10.2.153.33
18	10.2.153.34/31	10.2.153.34 – 10.2.153.35	10.2.153.35
19	10.2.153.36/31	10.2.153.36 – 10.2.153.37	10.2.153.37
20	10.2.153.38/31	10.2.153.38 – 10.2.153.39	10.2.153.39
21	10.2.153.40/31	10.2.153.40 – 10.2.153.41	10.2.153.41
22	10.2.153.42/31	10.2.153.42 – 10.2.153.43	10.2.153.43
23	10.2.153.44/31	10.2.153.44 – 10.2.153.45	10.2.153.45
24	10.2.153.46/31	10.2.153.46 – 10.2.153.47	10.2.153.47
25	10.2.153.48/31	10.2.153.48 – 10.2.153.49	10.2.153.49
26	10.2.153.50/31	10.2.153.50 – 10.2.153.51	10.2.153.51
27	10.2.153.52/31	10.2.153.52 – 10.2.153.53	10.2.153.53
28	10.2.153.54/31	10.2.153.54 – 10.2.153.55	10.2.153.55
29	10.2.153.56/31	10.2.153.56 – 10.2.153.57	10.2.153.57
30	10.2.153.58/31	10.2.153.58 – 10.2.153.59	10.2.153.59
31	10.2.153.60/31	10.2.153.60 – 10.2.153.61	10.2.153.61
32	10.2.153.62/31	10.2.153.62 – 10.2.153.63	10.2.153.63
33	10.2.153.64/31	10.2.153.64 – 10.2.153.65	10.2.153.65
34	10.2.153.66/31	10.2.153.66 – 10.2.153.67	10.2.153.67
35	10.2.153.68/31	10.2.153.68 – 10.2.153.69	10.2.153.69
36	10.2.153.70/31	10.2.153.70 – 10.2.153.71	10.2.153.71
37	10.2.153.72/31	10.2.153.72 – 10.2.153.73	10.2.153.73
38	10.2.153.74/31	10.2.153.74 – 10.2.153.75	10.2.153.75
39	10.2.153.76/31	10.2.153.76 – 10.2.153.77	10.2.153.77
40	10.2.153.78/31	10.2.153.78 – 10.2.153.79	10.2.153.79
41	10.2.153.80/31	10.2.153.80 – 10.2.153.81	10.2.153.81
42	10.2.153.82/31	10.2.153.82 – 10.2.153.83	10.2.153.83
43	10.2.153.84/31	10.2.153.84 – 10.2.153.85	10.2.153.85
44	10.2.153.86/31	10.2.153.86 – 10.2.153.87	10.2.153.87
45	10.2.153.88/31	10.2.153.88 – 10.2.153.89	10.2.153.89
46	10.2.153.90/31	10.2.153.90 – 10.2.153.91	10.2.153.91
47	10.2.153.92/31	10.2.153.92 – 10.2.153.93	10.2.153.93
48	10.2.153.94/31	10.2.153.94 – 10.2.153.95	10.2.153.95
49	10.2.153.96/31	10.2.153.96 – 10.2.153.97	10.2.153.97
50	10.2.153.98/31	10.2.153.98 – 10.2.153.99	10.2.153.99
51	10.2.153.100/31	10.2.153.100 – 10.2.153.101	10.2.153.101
52	10.2.153.102/31	10.2.153.102 – 10.2.153.103	10.2.153.103
53	10.2.153.104/31	10.2.153.104 – 10.2.153.105	10.2.153.105
54	10.2.153.106/31	10.2.153.106 – 10.2.153.107	10.2.153.107
55	10.2.153.108/31	10.2.153.108 – 10.2.153.109	10.2.153.109
56	10.2.153.110/31	10.2.153.110 – 10.2.153.111	10.2.153.111
57	10.2.153.112/31	10.2.153.112 – 10.2.153.113	10.2.153.113
58	10.2.153.114/31	10.2.153.114 – 10.2.153.115	10.2.153.115
59	10.2.153.116/31	10.2.153.116 – 10.2.153.117	10.2.153.117
60	10.2.153.118/31	10.2.153.118 – 10.2.153.119	10.2.153.119
61	10.2.153.120/31	10.2.153.120 – 10.2.153.121	10.2.153.121
62	10.2.153.122/31	10.2.153.122 – 10.2.153.123	10.2.153.123
63	10.2.153.124/31	10.2.153.124 – 10.2.153.125	10.2.153.125
64	10.2.153.126/31	10.2.153.126 – 10.2.153.127	10.2.153.127
65	10.2.153.128/31	10.2.153.128 – 10.2.153.129	10.2.153.129
66	10.2.153.130/31	10.2.153.130 – 10.2.153.131	10.2.153.131
67	10.2.153.132/31	10.2.153.132 – 10.2.153.133	10.2.153.133
68	10.2.153.134/31	10.2.153.134 – 10.2.153.135	10.2.153.135
69	10.2.153.136/31	10.2.153.136 – 10.2.153.137	10.2.153.137
70	10.2.153.138/31	10.2.153.138 – 10.2.153.139	10.2.153.139
71	10.2.153.140/31	10.2.153.140 – 10.2.153.141	10.2.153.141
72	10.2.153.142/31	10.2.153.142 – 10.2.153.143	10.2.153.143
73	10.2.153.144/31	10.2.153.144 – 10.2.153.145	10.2.153.145
74	10.2.153.146/31	10.2.153.146 – 10.2.153.147	10.2.153.147
75	10.2.153.148/31	10.2.153.148 – 10.2.153.149	10.2.153.149
76	10.2.153.150/31	10.2.153.150 – 10.2.153.151	10.2.153.151
77	10.2.153.152/31	10.2.153.152 – 10.2.153.153	10.2.153.153
78	10.2.153.154/31	10.2.153.154 – 10.2.153.155	10.2.153.155
79	10.2.153.156/31	10.2.153.156 – 10.2.153.157	10.2.153.157
80	10.2.153.158/31	10.2.153.158 – 10.2.153.159	10.2.153.159
81	10.2.153.160/31	10.2.153.160 – 10.2.153.161	10.2.153.161
82	10.2.153.162/31	10.2.153.162 – 10.2.153.163	10.2.153.163
83	10.2.153.164/31	10.2.153.164 – 10.2.153.165	10.2.153.165
84	10.2.153.166/31	10.2.153.166 – 10.2.153.167	10.2.153.167
85	10.2.153.168/31	10.2.153.168 – 10.2.153.169	10.2.153.169
86	10.2.153.170/31	10.2.153.170 – 10.2.153.171	10.2.153.171
87	10.2.153.172/31	10.2.153.172 – 10.2.153.173	10.2.153.173
88	10.2.153.174/31	10.2.153.174 – 10.2.153.175	10.2.153.175
89	10.2.153.176/31	10.2.153.176 – 10.2.153.177	10.2.153.177
90	10.2.153.178/31	10.2.153.178 – 10.2.153.179	10.2.153.179
91	10.2.153.180/31	10.2.153.180 – 10.2.153.181	10.2.153.181
92	10.2.153.182/31	10.2.153.182 – 10.2.153.183	10.2.153.183
93	10.2.153.184/31	10.2.153.184 – 10.2.153.185	10.2.153.185
94	10.2.153.186/31	10.2.153.186 – 10.2.153.187	10.2.153.187
95	10.2.153.188/31	10.2.153.188 – 10.2.153.189	10.2.153.189
96	10.2.153.190/31	10.2.153.190 – 10.2.153.191	10.2.153.191
97	10.2.153.192/31	10.2.153.192 – 10.2.153.193	10.2.153.193
98	10.2.153.194/31	10.2.153.194 – 10.2.153.195	10.2.153.195
99	10.2.153.196/31	10.2.153.196 – 10.2.153.197	10.2.153.197
100	10.2.153.198/31	10.2.153.198 – 10.2.153.199	10.2.153.199
101	10.2.153.200/31	10.2.153.200 – 10.2.153.201	10.2.153.201
102	10.2.153.202/31	10.2.153.202 – 10.2.153.203	10.2.153.203
103	10.2.153.204/31	10.2.153.204 – 10.2.153.205	10.2.153.205
104	10.2.153.206/31	10.2.153.206 – 10.2.153.207	10.2.153.207
105	10.2.153.208/31	10.2.153.208 – 10.2.153.209	10.2.153.209
106	10.2.153.210/31	10.2.153.210 – 10.2.153.211	10.2.153.211
107	10.2.153.212/31	10.2.153.212 – 10.2.153.213	10.2.153.213
108	10.2.153.214/31	10.2.153.214 – 10.2.153.215	10.2.153.215
109	10.2.153.216/31	10.2.153.216 – 10.2.153.217	10.2.153.217
110	10.2.153.218/31	10.2.153.218 – 10.2.153.219	10.2.153.219
111	10.2.153.220/31	10.2.153.220 – 10.2.153.221	10.2.153.221
112	10.2.153.222/31	10.2.153.222 – 10.2.153.223	10.2.153.223
113	10.2.153.224/31	10.2.153.224 – 10.2.153.225	10.2.153.225
114	10.2.153.226/31	10.2.153.226 – 10.2.153.227	10.2.153.227
115	10.2.153.228/31	10.2.153.228 – 10.2.153.229	10.2.153.229
116	10.2.153.230/31	10.2.153.230 – 10.2.153.231	10.2.153.231
117	10.2.153.232/31	10.2.153.232 – 10.2.153.233	10.2.153.233
118	10.2.153.234/31	10.2.153.234 – 10.2.153.235	10.2.153.235
119	10.2.153.236/31	10.2.153.236 – 10.2.153.237	10.2.153.237
120	10.2.153.238/31	10.2.153.238 – 10.2.153.239	10.2.153.239
121	10.2.153.240/31	10.2.153.240 – 10.2.153.241	10.2.153.241
122	10.2.153.242/31	10.2.153.242 – 10.2.153.243	10.2.153.243
123	10.2.153.244/31	10.2.153.244 – 10.2.153.245	10.2.153.245
124	10.2.153.246/31	10.2.153.246 – 10.2.153.247	10.2.153.247
125	10.2.153.248/31	10.2.153.248 – 10.2.153.249	10.2.153.249
126	10.2.153.250/31	10.2.153.250 – 10.2.153.251	10.2.153.251
127	10.2.153.252/31	10.2.153.252 – 10.2.153.253	10.2.153.253
128	10.2.153.254/31	10.2.153.254 – 10.2.153.255	10.2.153.255

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 →