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)10.167.152.128/25

network10.167.152.128/25

broadcast10.167.152.255

first host10.167.152.129

last host10.167.152.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.152.128/25

address00001010.10100111.10011000.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.10011000.10000000

broadcast00001010.10100111.10011000.11111111

green = network part, grey = host part

hex0x0aa79880

decimal178755712

reverse dns128.152.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:9880

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.152.128/32	10.167.152.128 – 10.167.152.128	10.167.152.128
2	10.167.152.129/32	10.167.152.129 – 10.167.152.129	10.167.152.129
3	10.167.152.130/32	10.167.152.130 – 10.167.152.130	10.167.152.130
4	10.167.152.131/32	10.167.152.131 – 10.167.152.131	10.167.152.131
5	10.167.152.132/32	10.167.152.132 – 10.167.152.132	10.167.152.132
6	10.167.152.133/32	10.167.152.133 – 10.167.152.133	10.167.152.133
7	10.167.152.134/32	10.167.152.134 – 10.167.152.134	10.167.152.134
8	10.167.152.135/32	10.167.152.135 – 10.167.152.135	10.167.152.135
9	10.167.152.136/32	10.167.152.136 – 10.167.152.136	10.167.152.136
10	10.167.152.137/32	10.167.152.137 – 10.167.152.137	10.167.152.137
11	10.167.152.138/32	10.167.152.138 – 10.167.152.138	10.167.152.138
12	10.167.152.139/32	10.167.152.139 – 10.167.152.139	10.167.152.139
13	10.167.152.140/32	10.167.152.140 – 10.167.152.140	10.167.152.140
14	10.167.152.141/32	10.167.152.141 – 10.167.152.141	10.167.152.141
15	10.167.152.142/32	10.167.152.142 – 10.167.152.142	10.167.152.142
16	10.167.152.143/32	10.167.152.143 – 10.167.152.143	10.167.152.143
17	10.167.152.144/32	10.167.152.144 – 10.167.152.144	10.167.152.144
18	10.167.152.145/32	10.167.152.145 – 10.167.152.145	10.167.152.145
19	10.167.152.146/32	10.167.152.146 – 10.167.152.146	10.167.152.146
20	10.167.152.147/32	10.167.152.147 – 10.167.152.147	10.167.152.147
21	10.167.152.148/32	10.167.152.148 – 10.167.152.148	10.167.152.148
22	10.167.152.149/32	10.167.152.149 – 10.167.152.149	10.167.152.149
23	10.167.152.150/32	10.167.152.150 – 10.167.152.150	10.167.152.150
24	10.167.152.151/32	10.167.152.151 – 10.167.152.151	10.167.152.151
25	10.167.152.152/32	10.167.152.152 – 10.167.152.152	10.167.152.152
26	10.167.152.153/32	10.167.152.153 – 10.167.152.153	10.167.152.153
27	10.167.152.154/32	10.167.152.154 – 10.167.152.154	10.167.152.154
28	10.167.152.155/32	10.167.152.155 – 10.167.152.155	10.167.152.155
29	10.167.152.156/32	10.167.152.156 – 10.167.152.156	10.167.152.156
30	10.167.152.157/32	10.167.152.157 – 10.167.152.157	10.167.152.157
31	10.167.152.158/32	10.167.152.158 – 10.167.152.158	10.167.152.158
32	10.167.152.159/32	10.167.152.159 – 10.167.152.159	10.167.152.159
33	10.167.152.160/32	10.167.152.160 – 10.167.152.160	10.167.152.160
34	10.167.152.161/32	10.167.152.161 – 10.167.152.161	10.167.152.161
35	10.167.152.162/32	10.167.152.162 – 10.167.152.162	10.167.152.162
36	10.167.152.163/32	10.167.152.163 – 10.167.152.163	10.167.152.163
37	10.167.152.164/32	10.167.152.164 – 10.167.152.164	10.167.152.164
38	10.167.152.165/32	10.167.152.165 – 10.167.152.165	10.167.152.165
39	10.167.152.166/32	10.167.152.166 – 10.167.152.166	10.167.152.166
40	10.167.152.167/32	10.167.152.167 – 10.167.152.167	10.167.152.167
41	10.167.152.168/32	10.167.152.168 – 10.167.152.168	10.167.152.168
42	10.167.152.169/32	10.167.152.169 – 10.167.152.169	10.167.152.169
43	10.167.152.170/32	10.167.152.170 – 10.167.152.170	10.167.152.170
44	10.167.152.171/32	10.167.152.171 – 10.167.152.171	10.167.152.171
45	10.167.152.172/32	10.167.152.172 – 10.167.152.172	10.167.152.172
46	10.167.152.173/32	10.167.152.173 – 10.167.152.173	10.167.152.173
47	10.167.152.174/32	10.167.152.174 – 10.167.152.174	10.167.152.174
48	10.167.152.175/32	10.167.152.175 – 10.167.152.175	10.167.152.175
49	10.167.152.176/32	10.167.152.176 – 10.167.152.176	10.167.152.176
50	10.167.152.177/32	10.167.152.177 – 10.167.152.177	10.167.152.177
51	10.167.152.178/32	10.167.152.178 – 10.167.152.178	10.167.152.178
52	10.167.152.179/32	10.167.152.179 – 10.167.152.179	10.167.152.179
53	10.167.152.180/32	10.167.152.180 – 10.167.152.180	10.167.152.180
54	10.167.152.181/32	10.167.152.181 – 10.167.152.181	10.167.152.181
55	10.167.152.182/32	10.167.152.182 – 10.167.152.182	10.167.152.182
56	10.167.152.183/32	10.167.152.183 – 10.167.152.183	10.167.152.183
57	10.167.152.184/32	10.167.152.184 – 10.167.152.184	10.167.152.184
58	10.167.152.185/32	10.167.152.185 – 10.167.152.185	10.167.152.185
59	10.167.152.186/32	10.167.152.186 – 10.167.152.186	10.167.152.186
60	10.167.152.187/32	10.167.152.187 – 10.167.152.187	10.167.152.187
61	10.167.152.188/32	10.167.152.188 – 10.167.152.188	10.167.152.188
62	10.167.152.189/32	10.167.152.189 – 10.167.152.189	10.167.152.189
63	10.167.152.190/32	10.167.152.190 – 10.167.152.190	10.167.152.190
64	10.167.152.191/32	10.167.152.191 – 10.167.152.191	10.167.152.191
65	10.167.152.192/32	10.167.152.192 – 10.167.152.192	10.167.152.192
66	10.167.152.193/32	10.167.152.193 – 10.167.152.193	10.167.152.193
67	10.167.152.194/32	10.167.152.194 – 10.167.152.194	10.167.152.194
68	10.167.152.195/32	10.167.152.195 – 10.167.152.195	10.167.152.195
69	10.167.152.196/32	10.167.152.196 – 10.167.152.196	10.167.152.196
70	10.167.152.197/32	10.167.152.197 – 10.167.152.197	10.167.152.197
71	10.167.152.198/32	10.167.152.198 – 10.167.152.198	10.167.152.198
72	10.167.152.199/32	10.167.152.199 – 10.167.152.199	10.167.152.199
73	10.167.152.200/32	10.167.152.200 – 10.167.152.200	10.167.152.200
74	10.167.152.201/32	10.167.152.201 – 10.167.152.201	10.167.152.201
75	10.167.152.202/32	10.167.152.202 – 10.167.152.202	10.167.152.202
76	10.167.152.203/32	10.167.152.203 – 10.167.152.203	10.167.152.203
77	10.167.152.204/32	10.167.152.204 – 10.167.152.204	10.167.152.204
78	10.167.152.205/32	10.167.152.205 – 10.167.152.205	10.167.152.205
79	10.167.152.206/32	10.167.152.206 – 10.167.152.206	10.167.152.206
80	10.167.152.207/32	10.167.152.207 – 10.167.152.207	10.167.152.207
81	10.167.152.208/32	10.167.152.208 – 10.167.152.208	10.167.152.208
82	10.167.152.209/32	10.167.152.209 – 10.167.152.209	10.167.152.209
83	10.167.152.210/32	10.167.152.210 – 10.167.152.210	10.167.152.210
84	10.167.152.211/32	10.167.152.211 – 10.167.152.211	10.167.152.211
85	10.167.152.212/32	10.167.152.212 – 10.167.152.212	10.167.152.212
86	10.167.152.213/32	10.167.152.213 – 10.167.152.213	10.167.152.213
87	10.167.152.214/32	10.167.152.214 – 10.167.152.214	10.167.152.214
88	10.167.152.215/32	10.167.152.215 – 10.167.152.215	10.167.152.215
89	10.167.152.216/32	10.167.152.216 – 10.167.152.216	10.167.152.216
90	10.167.152.217/32	10.167.152.217 – 10.167.152.217	10.167.152.217
91	10.167.152.218/32	10.167.152.218 – 10.167.152.218	10.167.152.218
92	10.167.152.219/32	10.167.152.219 – 10.167.152.219	10.167.152.219
93	10.167.152.220/32	10.167.152.220 – 10.167.152.220	10.167.152.220
94	10.167.152.221/32	10.167.152.221 – 10.167.152.221	10.167.152.221
95	10.167.152.222/32	10.167.152.222 – 10.167.152.222	10.167.152.222
96	10.167.152.223/32	10.167.152.223 – 10.167.152.223	10.167.152.223
97	10.167.152.224/32	10.167.152.224 – 10.167.152.224	10.167.152.224
98	10.167.152.225/32	10.167.152.225 – 10.167.152.225	10.167.152.225
99	10.167.152.226/32	10.167.152.226 – 10.167.152.226	10.167.152.226
100	10.167.152.227/32	10.167.152.227 – 10.167.152.227	10.167.152.227
101	10.167.152.228/32	10.167.152.228 – 10.167.152.228	10.167.152.228
102	10.167.152.229/32	10.167.152.229 – 10.167.152.229	10.167.152.229
103	10.167.152.230/32	10.167.152.230 – 10.167.152.230	10.167.152.230
104	10.167.152.231/32	10.167.152.231 – 10.167.152.231	10.167.152.231
105	10.167.152.232/32	10.167.152.232 – 10.167.152.232	10.167.152.232
106	10.167.152.233/32	10.167.152.233 – 10.167.152.233	10.167.152.233
107	10.167.152.234/32	10.167.152.234 – 10.167.152.234	10.167.152.234
108	10.167.152.235/32	10.167.152.235 – 10.167.152.235	10.167.152.235
109	10.167.152.236/32	10.167.152.236 – 10.167.152.236	10.167.152.236
110	10.167.152.237/32	10.167.152.237 – 10.167.152.237	10.167.152.237
111	10.167.152.238/32	10.167.152.238 – 10.167.152.238	10.167.152.238
112	10.167.152.239/32	10.167.152.239 – 10.167.152.239	10.167.152.239
113	10.167.152.240/32	10.167.152.240 – 10.167.152.240	10.167.152.240
114	10.167.152.241/32	10.167.152.241 – 10.167.152.241	10.167.152.241
115	10.167.152.242/32	10.167.152.242 – 10.167.152.242	10.167.152.242
116	10.167.152.243/32	10.167.152.243 – 10.167.152.243	10.167.152.243
117	10.167.152.244/32	10.167.152.244 – 10.167.152.244	10.167.152.244
118	10.167.152.245/32	10.167.152.245 – 10.167.152.245	10.167.152.245
119	10.167.152.246/32	10.167.152.246 – 10.167.152.246	10.167.152.246
120	10.167.152.247/32	10.167.152.247 – 10.167.152.247	10.167.152.247
121	10.167.152.248/32	10.167.152.248 – 10.167.152.248	10.167.152.248
122	10.167.152.249/32	10.167.152.249 – 10.167.152.249	10.167.152.249
123	10.167.152.250/32	10.167.152.250 – 10.167.152.250	10.167.152.250
124	10.167.152.251/32	10.167.152.251 – 10.167.152.251	10.167.152.251
125	10.167.152.252/32	10.167.152.252 – 10.167.152.252	10.167.152.252
126	10.167.152.253/32	10.167.152.253 – 10.167.152.253	10.167.152.253
127	10.167.152.254/32	10.167.152.254 – 10.167.152.254	10.167.152.254
128	10.167.152.255/32	10.167.152.255 – 10.167.152.255	10.167.152.255

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 →