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)10.167.94.128/25

network10.167.94.128/25

broadcast10.167.94.255

first host10.167.94.129

last host10.167.94.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.94.128/25

address00001010.10100111.01011110.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.01011110.10000000

broadcast00001010.10100111.01011110.11111111

green = network part, grey = host part

hex0x0aa75e80

decimal178740864

reverse dns128.94.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:5e80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.94.128/32	10.167.94.128 – 10.167.94.128	10.167.94.128
2	10.167.94.129/32	10.167.94.129 – 10.167.94.129	10.167.94.129
3	10.167.94.130/32	10.167.94.130 – 10.167.94.130	10.167.94.130
4	10.167.94.131/32	10.167.94.131 – 10.167.94.131	10.167.94.131
5	10.167.94.132/32	10.167.94.132 – 10.167.94.132	10.167.94.132
6	10.167.94.133/32	10.167.94.133 – 10.167.94.133	10.167.94.133
7	10.167.94.134/32	10.167.94.134 – 10.167.94.134	10.167.94.134
8	10.167.94.135/32	10.167.94.135 – 10.167.94.135	10.167.94.135
9	10.167.94.136/32	10.167.94.136 – 10.167.94.136	10.167.94.136
10	10.167.94.137/32	10.167.94.137 – 10.167.94.137	10.167.94.137
11	10.167.94.138/32	10.167.94.138 – 10.167.94.138	10.167.94.138
12	10.167.94.139/32	10.167.94.139 – 10.167.94.139	10.167.94.139
13	10.167.94.140/32	10.167.94.140 – 10.167.94.140	10.167.94.140
14	10.167.94.141/32	10.167.94.141 – 10.167.94.141	10.167.94.141
15	10.167.94.142/32	10.167.94.142 – 10.167.94.142	10.167.94.142
16	10.167.94.143/32	10.167.94.143 – 10.167.94.143	10.167.94.143
17	10.167.94.144/32	10.167.94.144 – 10.167.94.144	10.167.94.144
18	10.167.94.145/32	10.167.94.145 – 10.167.94.145	10.167.94.145
19	10.167.94.146/32	10.167.94.146 – 10.167.94.146	10.167.94.146
20	10.167.94.147/32	10.167.94.147 – 10.167.94.147	10.167.94.147
21	10.167.94.148/32	10.167.94.148 – 10.167.94.148	10.167.94.148
22	10.167.94.149/32	10.167.94.149 – 10.167.94.149	10.167.94.149
23	10.167.94.150/32	10.167.94.150 – 10.167.94.150	10.167.94.150
24	10.167.94.151/32	10.167.94.151 – 10.167.94.151	10.167.94.151
25	10.167.94.152/32	10.167.94.152 – 10.167.94.152	10.167.94.152
26	10.167.94.153/32	10.167.94.153 – 10.167.94.153	10.167.94.153
27	10.167.94.154/32	10.167.94.154 – 10.167.94.154	10.167.94.154
28	10.167.94.155/32	10.167.94.155 – 10.167.94.155	10.167.94.155
29	10.167.94.156/32	10.167.94.156 – 10.167.94.156	10.167.94.156
30	10.167.94.157/32	10.167.94.157 – 10.167.94.157	10.167.94.157
31	10.167.94.158/32	10.167.94.158 – 10.167.94.158	10.167.94.158
32	10.167.94.159/32	10.167.94.159 – 10.167.94.159	10.167.94.159
33	10.167.94.160/32	10.167.94.160 – 10.167.94.160	10.167.94.160
34	10.167.94.161/32	10.167.94.161 – 10.167.94.161	10.167.94.161
35	10.167.94.162/32	10.167.94.162 – 10.167.94.162	10.167.94.162
36	10.167.94.163/32	10.167.94.163 – 10.167.94.163	10.167.94.163
37	10.167.94.164/32	10.167.94.164 – 10.167.94.164	10.167.94.164
38	10.167.94.165/32	10.167.94.165 – 10.167.94.165	10.167.94.165
39	10.167.94.166/32	10.167.94.166 – 10.167.94.166	10.167.94.166
40	10.167.94.167/32	10.167.94.167 – 10.167.94.167	10.167.94.167
41	10.167.94.168/32	10.167.94.168 – 10.167.94.168	10.167.94.168
42	10.167.94.169/32	10.167.94.169 – 10.167.94.169	10.167.94.169
43	10.167.94.170/32	10.167.94.170 – 10.167.94.170	10.167.94.170
44	10.167.94.171/32	10.167.94.171 – 10.167.94.171	10.167.94.171
45	10.167.94.172/32	10.167.94.172 – 10.167.94.172	10.167.94.172
46	10.167.94.173/32	10.167.94.173 – 10.167.94.173	10.167.94.173
47	10.167.94.174/32	10.167.94.174 – 10.167.94.174	10.167.94.174
48	10.167.94.175/32	10.167.94.175 – 10.167.94.175	10.167.94.175
49	10.167.94.176/32	10.167.94.176 – 10.167.94.176	10.167.94.176
50	10.167.94.177/32	10.167.94.177 – 10.167.94.177	10.167.94.177
51	10.167.94.178/32	10.167.94.178 – 10.167.94.178	10.167.94.178
52	10.167.94.179/32	10.167.94.179 – 10.167.94.179	10.167.94.179
53	10.167.94.180/32	10.167.94.180 – 10.167.94.180	10.167.94.180
54	10.167.94.181/32	10.167.94.181 – 10.167.94.181	10.167.94.181
55	10.167.94.182/32	10.167.94.182 – 10.167.94.182	10.167.94.182
56	10.167.94.183/32	10.167.94.183 – 10.167.94.183	10.167.94.183
57	10.167.94.184/32	10.167.94.184 – 10.167.94.184	10.167.94.184
58	10.167.94.185/32	10.167.94.185 – 10.167.94.185	10.167.94.185
59	10.167.94.186/32	10.167.94.186 – 10.167.94.186	10.167.94.186
60	10.167.94.187/32	10.167.94.187 – 10.167.94.187	10.167.94.187
61	10.167.94.188/32	10.167.94.188 – 10.167.94.188	10.167.94.188
62	10.167.94.189/32	10.167.94.189 – 10.167.94.189	10.167.94.189
63	10.167.94.190/32	10.167.94.190 – 10.167.94.190	10.167.94.190
64	10.167.94.191/32	10.167.94.191 – 10.167.94.191	10.167.94.191
65	10.167.94.192/32	10.167.94.192 – 10.167.94.192	10.167.94.192
66	10.167.94.193/32	10.167.94.193 – 10.167.94.193	10.167.94.193
67	10.167.94.194/32	10.167.94.194 – 10.167.94.194	10.167.94.194
68	10.167.94.195/32	10.167.94.195 – 10.167.94.195	10.167.94.195
69	10.167.94.196/32	10.167.94.196 – 10.167.94.196	10.167.94.196
70	10.167.94.197/32	10.167.94.197 – 10.167.94.197	10.167.94.197
71	10.167.94.198/32	10.167.94.198 – 10.167.94.198	10.167.94.198
72	10.167.94.199/32	10.167.94.199 – 10.167.94.199	10.167.94.199
73	10.167.94.200/32	10.167.94.200 – 10.167.94.200	10.167.94.200
74	10.167.94.201/32	10.167.94.201 – 10.167.94.201	10.167.94.201
75	10.167.94.202/32	10.167.94.202 – 10.167.94.202	10.167.94.202
76	10.167.94.203/32	10.167.94.203 – 10.167.94.203	10.167.94.203
77	10.167.94.204/32	10.167.94.204 – 10.167.94.204	10.167.94.204
78	10.167.94.205/32	10.167.94.205 – 10.167.94.205	10.167.94.205
79	10.167.94.206/32	10.167.94.206 – 10.167.94.206	10.167.94.206
80	10.167.94.207/32	10.167.94.207 – 10.167.94.207	10.167.94.207
81	10.167.94.208/32	10.167.94.208 – 10.167.94.208	10.167.94.208
82	10.167.94.209/32	10.167.94.209 – 10.167.94.209	10.167.94.209
83	10.167.94.210/32	10.167.94.210 – 10.167.94.210	10.167.94.210
84	10.167.94.211/32	10.167.94.211 – 10.167.94.211	10.167.94.211
85	10.167.94.212/32	10.167.94.212 – 10.167.94.212	10.167.94.212
86	10.167.94.213/32	10.167.94.213 – 10.167.94.213	10.167.94.213
87	10.167.94.214/32	10.167.94.214 – 10.167.94.214	10.167.94.214
88	10.167.94.215/32	10.167.94.215 – 10.167.94.215	10.167.94.215
89	10.167.94.216/32	10.167.94.216 – 10.167.94.216	10.167.94.216
90	10.167.94.217/32	10.167.94.217 – 10.167.94.217	10.167.94.217
91	10.167.94.218/32	10.167.94.218 – 10.167.94.218	10.167.94.218
92	10.167.94.219/32	10.167.94.219 – 10.167.94.219	10.167.94.219
93	10.167.94.220/32	10.167.94.220 – 10.167.94.220	10.167.94.220
94	10.167.94.221/32	10.167.94.221 – 10.167.94.221	10.167.94.221
95	10.167.94.222/32	10.167.94.222 – 10.167.94.222	10.167.94.222
96	10.167.94.223/32	10.167.94.223 – 10.167.94.223	10.167.94.223
97	10.167.94.224/32	10.167.94.224 – 10.167.94.224	10.167.94.224
98	10.167.94.225/32	10.167.94.225 – 10.167.94.225	10.167.94.225
99	10.167.94.226/32	10.167.94.226 – 10.167.94.226	10.167.94.226
100	10.167.94.227/32	10.167.94.227 – 10.167.94.227	10.167.94.227
101	10.167.94.228/32	10.167.94.228 – 10.167.94.228	10.167.94.228
102	10.167.94.229/32	10.167.94.229 – 10.167.94.229	10.167.94.229
103	10.167.94.230/32	10.167.94.230 – 10.167.94.230	10.167.94.230
104	10.167.94.231/32	10.167.94.231 – 10.167.94.231	10.167.94.231
105	10.167.94.232/32	10.167.94.232 – 10.167.94.232	10.167.94.232
106	10.167.94.233/32	10.167.94.233 – 10.167.94.233	10.167.94.233
107	10.167.94.234/32	10.167.94.234 – 10.167.94.234	10.167.94.234
108	10.167.94.235/32	10.167.94.235 – 10.167.94.235	10.167.94.235
109	10.167.94.236/32	10.167.94.236 – 10.167.94.236	10.167.94.236
110	10.167.94.237/32	10.167.94.237 – 10.167.94.237	10.167.94.237
111	10.167.94.238/32	10.167.94.238 – 10.167.94.238	10.167.94.238
112	10.167.94.239/32	10.167.94.239 – 10.167.94.239	10.167.94.239
113	10.167.94.240/32	10.167.94.240 – 10.167.94.240	10.167.94.240
114	10.167.94.241/32	10.167.94.241 – 10.167.94.241	10.167.94.241
115	10.167.94.242/32	10.167.94.242 – 10.167.94.242	10.167.94.242
116	10.167.94.243/32	10.167.94.243 – 10.167.94.243	10.167.94.243
117	10.167.94.244/32	10.167.94.244 – 10.167.94.244	10.167.94.244
118	10.167.94.245/32	10.167.94.245 – 10.167.94.245	10.167.94.245
119	10.167.94.246/32	10.167.94.246 – 10.167.94.246	10.167.94.246
120	10.167.94.247/32	10.167.94.247 – 10.167.94.247	10.167.94.247
121	10.167.94.248/32	10.167.94.248 – 10.167.94.248	10.167.94.248
122	10.167.94.249/32	10.167.94.249 – 10.167.94.249	10.167.94.249
123	10.167.94.250/32	10.167.94.250 – 10.167.94.250	10.167.94.250
124	10.167.94.251/32	10.167.94.251 – 10.167.94.251	10.167.94.251
125	10.167.94.252/32	10.167.94.252 – 10.167.94.252	10.167.94.252
126	10.167.94.253/32	10.167.94.253 – 10.167.94.253	10.167.94.253
127	10.167.94.254/32	10.167.94.254 – 10.167.94.254	10.167.94.254
128	10.167.94.255/32	10.167.94.255 – 10.167.94.255	10.167.94.255

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 →