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)10.167.52.128/25

network10.167.52.128/25

broadcast10.167.52.255

first host10.167.52.129

last host10.167.52.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.52.128/25

address00001010.10100111.00110100.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.00110100.10000000

broadcast00001010.10100111.00110100.11111111

green = network part, grey = host part

hex0x0aa73480

decimal178730112

reverse dns128.52.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:3480

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.52.128/32	10.167.52.128 – 10.167.52.128	10.167.52.128
2	10.167.52.129/32	10.167.52.129 – 10.167.52.129	10.167.52.129
3	10.167.52.130/32	10.167.52.130 – 10.167.52.130	10.167.52.130
4	10.167.52.131/32	10.167.52.131 – 10.167.52.131	10.167.52.131
5	10.167.52.132/32	10.167.52.132 – 10.167.52.132	10.167.52.132
6	10.167.52.133/32	10.167.52.133 – 10.167.52.133	10.167.52.133
7	10.167.52.134/32	10.167.52.134 – 10.167.52.134	10.167.52.134
8	10.167.52.135/32	10.167.52.135 – 10.167.52.135	10.167.52.135
9	10.167.52.136/32	10.167.52.136 – 10.167.52.136	10.167.52.136
10	10.167.52.137/32	10.167.52.137 – 10.167.52.137	10.167.52.137
11	10.167.52.138/32	10.167.52.138 – 10.167.52.138	10.167.52.138
12	10.167.52.139/32	10.167.52.139 – 10.167.52.139	10.167.52.139
13	10.167.52.140/32	10.167.52.140 – 10.167.52.140	10.167.52.140
14	10.167.52.141/32	10.167.52.141 – 10.167.52.141	10.167.52.141
15	10.167.52.142/32	10.167.52.142 – 10.167.52.142	10.167.52.142
16	10.167.52.143/32	10.167.52.143 – 10.167.52.143	10.167.52.143
17	10.167.52.144/32	10.167.52.144 – 10.167.52.144	10.167.52.144
18	10.167.52.145/32	10.167.52.145 – 10.167.52.145	10.167.52.145
19	10.167.52.146/32	10.167.52.146 – 10.167.52.146	10.167.52.146
20	10.167.52.147/32	10.167.52.147 – 10.167.52.147	10.167.52.147
21	10.167.52.148/32	10.167.52.148 – 10.167.52.148	10.167.52.148
22	10.167.52.149/32	10.167.52.149 – 10.167.52.149	10.167.52.149
23	10.167.52.150/32	10.167.52.150 – 10.167.52.150	10.167.52.150
24	10.167.52.151/32	10.167.52.151 – 10.167.52.151	10.167.52.151
25	10.167.52.152/32	10.167.52.152 – 10.167.52.152	10.167.52.152
26	10.167.52.153/32	10.167.52.153 – 10.167.52.153	10.167.52.153
27	10.167.52.154/32	10.167.52.154 – 10.167.52.154	10.167.52.154
28	10.167.52.155/32	10.167.52.155 – 10.167.52.155	10.167.52.155
29	10.167.52.156/32	10.167.52.156 – 10.167.52.156	10.167.52.156
30	10.167.52.157/32	10.167.52.157 – 10.167.52.157	10.167.52.157
31	10.167.52.158/32	10.167.52.158 – 10.167.52.158	10.167.52.158
32	10.167.52.159/32	10.167.52.159 – 10.167.52.159	10.167.52.159
33	10.167.52.160/32	10.167.52.160 – 10.167.52.160	10.167.52.160
34	10.167.52.161/32	10.167.52.161 – 10.167.52.161	10.167.52.161
35	10.167.52.162/32	10.167.52.162 – 10.167.52.162	10.167.52.162
36	10.167.52.163/32	10.167.52.163 – 10.167.52.163	10.167.52.163
37	10.167.52.164/32	10.167.52.164 – 10.167.52.164	10.167.52.164
38	10.167.52.165/32	10.167.52.165 – 10.167.52.165	10.167.52.165
39	10.167.52.166/32	10.167.52.166 – 10.167.52.166	10.167.52.166
40	10.167.52.167/32	10.167.52.167 – 10.167.52.167	10.167.52.167
41	10.167.52.168/32	10.167.52.168 – 10.167.52.168	10.167.52.168
42	10.167.52.169/32	10.167.52.169 – 10.167.52.169	10.167.52.169
43	10.167.52.170/32	10.167.52.170 – 10.167.52.170	10.167.52.170
44	10.167.52.171/32	10.167.52.171 – 10.167.52.171	10.167.52.171
45	10.167.52.172/32	10.167.52.172 – 10.167.52.172	10.167.52.172
46	10.167.52.173/32	10.167.52.173 – 10.167.52.173	10.167.52.173
47	10.167.52.174/32	10.167.52.174 – 10.167.52.174	10.167.52.174
48	10.167.52.175/32	10.167.52.175 – 10.167.52.175	10.167.52.175
49	10.167.52.176/32	10.167.52.176 – 10.167.52.176	10.167.52.176
50	10.167.52.177/32	10.167.52.177 – 10.167.52.177	10.167.52.177
51	10.167.52.178/32	10.167.52.178 – 10.167.52.178	10.167.52.178
52	10.167.52.179/32	10.167.52.179 – 10.167.52.179	10.167.52.179
53	10.167.52.180/32	10.167.52.180 – 10.167.52.180	10.167.52.180
54	10.167.52.181/32	10.167.52.181 – 10.167.52.181	10.167.52.181
55	10.167.52.182/32	10.167.52.182 – 10.167.52.182	10.167.52.182
56	10.167.52.183/32	10.167.52.183 – 10.167.52.183	10.167.52.183
57	10.167.52.184/32	10.167.52.184 – 10.167.52.184	10.167.52.184
58	10.167.52.185/32	10.167.52.185 – 10.167.52.185	10.167.52.185
59	10.167.52.186/32	10.167.52.186 – 10.167.52.186	10.167.52.186
60	10.167.52.187/32	10.167.52.187 – 10.167.52.187	10.167.52.187
61	10.167.52.188/32	10.167.52.188 – 10.167.52.188	10.167.52.188
62	10.167.52.189/32	10.167.52.189 – 10.167.52.189	10.167.52.189
63	10.167.52.190/32	10.167.52.190 – 10.167.52.190	10.167.52.190
64	10.167.52.191/32	10.167.52.191 – 10.167.52.191	10.167.52.191
65	10.167.52.192/32	10.167.52.192 – 10.167.52.192	10.167.52.192
66	10.167.52.193/32	10.167.52.193 – 10.167.52.193	10.167.52.193
67	10.167.52.194/32	10.167.52.194 – 10.167.52.194	10.167.52.194
68	10.167.52.195/32	10.167.52.195 – 10.167.52.195	10.167.52.195
69	10.167.52.196/32	10.167.52.196 – 10.167.52.196	10.167.52.196
70	10.167.52.197/32	10.167.52.197 – 10.167.52.197	10.167.52.197
71	10.167.52.198/32	10.167.52.198 – 10.167.52.198	10.167.52.198
72	10.167.52.199/32	10.167.52.199 – 10.167.52.199	10.167.52.199
73	10.167.52.200/32	10.167.52.200 – 10.167.52.200	10.167.52.200
74	10.167.52.201/32	10.167.52.201 – 10.167.52.201	10.167.52.201
75	10.167.52.202/32	10.167.52.202 – 10.167.52.202	10.167.52.202
76	10.167.52.203/32	10.167.52.203 – 10.167.52.203	10.167.52.203
77	10.167.52.204/32	10.167.52.204 – 10.167.52.204	10.167.52.204
78	10.167.52.205/32	10.167.52.205 – 10.167.52.205	10.167.52.205
79	10.167.52.206/32	10.167.52.206 – 10.167.52.206	10.167.52.206
80	10.167.52.207/32	10.167.52.207 – 10.167.52.207	10.167.52.207
81	10.167.52.208/32	10.167.52.208 – 10.167.52.208	10.167.52.208
82	10.167.52.209/32	10.167.52.209 – 10.167.52.209	10.167.52.209
83	10.167.52.210/32	10.167.52.210 – 10.167.52.210	10.167.52.210
84	10.167.52.211/32	10.167.52.211 – 10.167.52.211	10.167.52.211
85	10.167.52.212/32	10.167.52.212 – 10.167.52.212	10.167.52.212
86	10.167.52.213/32	10.167.52.213 – 10.167.52.213	10.167.52.213
87	10.167.52.214/32	10.167.52.214 – 10.167.52.214	10.167.52.214
88	10.167.52.215/32	10.167.52.215 – 10.167.52.215	10.167.52.215
89	10.167.52.216/32	10.167.52.216 – 10.167.52.216	10.167.52.216
90	10.167.52.217/32	10.167.52.217 – 10.167.52.217	10.167.52.217
91	10.167.52.218/32	10.167.52.218 – 10.167.52.218	10.167.52.218
92	10.167.52.219/32	10.167.52.219 – 10.167.52.219	10.167.52.219
93	10.167.52.220/32	10.167.52.220 – 10.167.52.220	10.167.52.220
94	10.167.52.221/32	10.167.52.221 – 10.167.52.221	10.167.52.221
95	10.167.52.222/32	10.167.52.222 – 10.167.52.222	10.167.52.222
96	10.167.52.223/32	10.167.52.223 – 10.167.52.223	10.167.52.223
97	10.167.52.224/32	10.167.52.224 – 10.167.52.224	10.167.52.224
98	10.167.52.225/32	10.167.52.225 – 10.167.52.225	10.167.52.225
99	10.167.52.226/32	10.167.52.226 – 10.167.52.226	10.167.52.226
100	10.167.52.227/32	10.167.52.227 – 10.167.52.227	10.167.52.227
101	10.167.52.228/32	10.167.52.228 – 10.167.52.228	10.167.52.228
102	10.167.52.229/32	10.167.52.229 – 10.167.52.229	10.167.52.229
103	10.167.52.230/32	10.167.52.230 – 10.167.52.230	10.167.52.230
104	10.167.52.231/32	10.167.52.231 – 10.167.52.231	10.167.52.231
105	10.167.52.232/32	10.167.52.232 – 10.167.52.232	10.167.52.232
106	10.167.52.233/32	10.167.52.233 – 10.167.52.233	10.167.52.233
107	10.167.52.234/32	10.167.52.234 – 10.167.52.234	10.167.52.234
108	10.167.52.235/32	10.167.52.235 – 10.167.52.235	10.167.52.235
109	10.167.52.236/32	10.167.52.236 – 10.167.52.236	10.167.52.236
110	10.167.52.237/32	10.167.52.237 – 10.167.52.237	10.167.52.237
111	10.167.52.238/32	10.167.52.238 – 10.167.52.238	10.167.52.238
112	10.167.52.239/32	10.167.52.239 – 10.167.52.239	10.167.52.239
113	10.167.52.240/32	10.167.52.240 – 10.167.52.240	10.167.52.240
114	10.167.52.241/32	10.167.52.241 – 10.167.52.241	10.167.52.241
115	10.167.52.242/32	10.167.52.242 – 10.167.52.242	10.167.52.242
116	10.167.52.243/32	10.167.52.243 – 10.167.52.243	10.167.52.243
117	10.167.52.244/32	10.167.52.244 – 10.167.52.244	10.167.52.244
118	10.167.52.245/32	10.167.52.245 – 10.167.52.245	10.167.52.245
119	10.167.52.246/32	10.167.52.246 – 10.167.52.246	10.167.52.246
120	10.167.52.247/32	10.167.52.247 – 10.167.52.247	10.167.52.247
121	10.167.52.248/32	10.167.52.248 – 10.167.52.248	10.167.52.248
122	10.167.52.249/32	10.167.52.249 – 10.167.52.249	10.167.52.249
123	10.167.52.250/32	10.167.52.250 – 10.167.52.250	10.167.52.250
124	10.167.52.251/32	10.167.52.251 – 10.167.52.251	10.167.52.251
125	10.167.52.252/32	10.167.52.252 – 10.167.52.252	10.167.52.252
126	10.167.52.253/32	10.167.52.253 – 10.167.52.253	10.167.52.253
127	10.167.52.254/32	10.167.52.254 – 10.167.52.254	10.167.52.254
128	10.167.52.255/32	10.167.52.255 – 10.167.52.255	10.167.52.255

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 /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 →