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)10.167.173.128/25

network10.167.173.128/25

broadcast10.167.173.255

first host10.167.173.129

last host10.167.173.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.167.173.128/25

address00001010.10100111.10101101.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.10100111.10101101.10000000

broadcast00001010.10100111.10101101.11111111

green = network part, grey = host part

hex0x0aa7ad80

decimal178761088

reverse dns128.173.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:ad80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.167.173.128/32	10.167.173.128 – 10.167.173.128	10.167.173.128
2	10.167.173.129/32	10.167.173.129 – 10.167.173.129	10.167.173.129
3	10.167.173.130/32	10.167.173.130 – 10.167.173.130	10.167.173.130
4	10.167.173.131/32	10.167.173.131 – 10.167.173.131	10.167.173.131
5	10.167.173.132/32	10.167.173.132 – 10.167.173.132	10.167.173.132
6	10.167.173.133/32	10.167.173.133 – 10.167.173.133	10.167.173.133
7	10.167.173.134/32	10.167.173.134 – 10.167.173.134	10.167.173.134
8	10.167.173.135/32	10.167.173.135 – 10.167.173.135	10.167.173.135
9	10.167.173.136/32	10.167.173.136 – 10.167.173.136	10.167.173.136
10	10.167.173.137/32	10.167.173.137 – 10.167.173.137	10.167.173.137
11	10.167.173.138/32	10.167.173.138 – 10.167.173.138	10.167.173.138
12	10.167.173.139/32	10.167.173.139 – 10.167.173.139	10.167.173.139
13	10.167.173.140/32	10.167.173.140 – 10.167.173.140	10.167.173.140
14	10.167.173.141/32	10.167.173.141 – 10.167.173.141	10.167.173.141
15	10.167.173.142/32	10.167.173.142 – 10.167.173.142	10.167.173.142
16	10.167.173.143/32	10.167.173.143 – 10.167.173.143	10.167.173.143
17	10.167.173.144/32	10.167.173.144 – 10.167.173.144	10.167.173.144
18	10.167.173.145/32	10.167.173.145 – 10.167.173.145	10.167.173.145
19	10.167.173.146/32	10.167.173.146 – 10.167.173.146	10.167.173.146
20	10.167.173.147/32	10.167.173.147 – 10.167.173.147	10.167.173.147
21	10.167.173.148/32	10.167.173.148 – 10.167.173.148	10.167.173.148
22	10.167.173.149/32	10.167.173.149 – 10.167.173.149	10.167.173.149
23	10.167.173.150/32	10.167.173.150 – 10.167.173.150	10.167.173.150
24	10.167.173.151/32	10.167.173.151 – 10.167.173.151	10.167.173.151
25	10.167.173.152/32	10.167.173.152 – 10.167.173.152	10.167.173.152
26	10.167.173.153/32	10.167.173.153 – 10.167.173.153	10.167.173.153
27	10.167.173.154/32	10.167.173.154 – 10.167.173.154	10.167.173.154
28	10.167.173.155/32	10.167.173.155 – 10.167.173.155	10.167.173.155
29	10.167.173.156/32	10.167.173.156 – 10.167.173.156	10.167.173.156
30	10.167.173.157/32	10.167.173.157 – 10.167.173.157	10.167.173.157
31	10.167.173.158/32	10.167.173.158 – 10.167.173.158	10.167.173.158
32	10.167.173.159/32	10.167.173.159 – 10.167.173.159	10.167.173.159
33	10.167.173.160/32	10.167.173.160 – 10.167.173.160	10.167.173.160
34	10.167.173.161/32	10.167.173.161 – 10.167.173.161	10.167.173.161
35	10.167.173.162/32	10.167.173.162 – 10.167.173.162	10.167.173.162
36	10.167.173.163/32	10.167.173.163 – 10.167.173.163	10.167.173.163
37	10.167.173.164/32	10.167.173.164 – 10.167.173.164	10.167.173.164
38	10.167.173.165/32	10.167.173.165 – 10.167.173.165	10.167.173.165
39	10.167.173.166/32	10.167.173.166 – 10.167.173.166	10.167.173.166
40	10.167.173.167/32	10.167.173.167 – 10.167.173.167	10.167.173.167
41	10.167.173.168/32	10.167.173.168 – 10.167.173.168	10.167.173.168
42	10.167.173.169/32	10.167.173.169 – 10.167.173.169	10.167.173.169
43	10.167.173.170/32	10.167.173.170 – 10.167.173.170	10.167.173.170
44	10.167.173.171/32	10.167.173.171 – 10.167.173.171	10.167.173.171
45	10.167.173.172/32	10.167.173.172 – 10.167.173.172	10.167.173.172
46	10.167.173.173/32	10.167.173.173 – 10.167.173.173	10.167.173.173
47	10.167.173.174/32	10.167.173.174 – 10.167.173.174	10.167.173.174
48	10.167.173.175/32	10.167.173.175 – 10.167.173.175	10.167.173.175
49	10.167.173.176/32	10.167.173.176 – 10.167.173.176	10.167.173.176
50	10.167.173.177/32	10.167.173.177 – 10.167.173.177	10.167.173.177
51	10.167.173.178/32	10.167.173.178 – 10.167.173.178	10.167.173.178
52	10.167.173.179/32	10.167.173.179 – 10.167.173.179	10.167.173.179
53	10.167.173.180/32	10.167.173.180 – 10.167.173.180	10.167.173.180
54	10.167.173.181/32	10.167.173.181 – 10.167.173.181	10.167.173.181
55	10.167.173.182/32	10.167.173.182 – 10.167.173.182	10.167.173.182
56	10.167.173.183/32	10.167.173.183 – 10.167.173.183	10.167.173.183
57	10.167.173.184/32	10.167.173.184 – 10.167.173.184	10.167.173.184
58	10.167.173.185/32	10.167.173.185 – 10.167.173.185	10.167.173.185
59	10.167.173.186/32	10.167.173.186 – 10.167.173.186	10.167.173.186
60	10.167.173.187/32	10.167.173.187 – 10.167.173.187	10.167.173.187
61	10.167.173.188/32	10.167.173.188 – 10.167.173.188	10.167.173.188
62	10.167.173.189/32	10.167.173.189 – 10.167.173.189	10.167.173.189
63	10.167.173.190/32	10.167.173.190 – 10.167.173.190	10.167.173.190
64	10.167.173.191/32	10.167.173.191 – 10.167.173.191	10.167.173.191
65	10.167.173.192/32	10.167.173.192 – 10.167.173.192	10.167.173.192
66	10.167.173.193/32	10.167.173.193 – 10.167.173.193	10.167.173.193
67	10.167.173.194/32	10.167.173.194 – 10.167.173.194	10.167.173.194
68	10.167.173.195/32	10.167.173.195 – 10.167.173.195	10.167.173.195
69	10.167.173.196/32	10.167.173.196 – 10.167.173.196	10.167.173.196
70	10.167.173.197/32	10.167.173.197 – 10.167.173.197	10.167.173.197
71	10.167.173.198/32	10.167.173.198 – 10.167.173.198	10.167.173.198
72	10.167.173.199/32	10.167.173.199 – 10.167.173.199	10.167.173.199
73	10.167.173.200/32	10.167.173.200 – 10.167.173.200	10.167.173.200
74	10.167.173.201/32	10.167.173.201 – 10.167.173.201	10.167.173.201
75	10.167.173.202/32	10.167.173.202 – 10.167.173.202	10.167.173.202
76	10.167.173.203/32	10.167.173.203 – 10.167.173.203	10.167.173.203
77	10.167.173.204/32	10.167.173.204 – 10.167.173.204	10.167.173.204
78	10.167.173.205/32	10.167.173.205 – 10.167.173.205	10.167.173.205
79	10.167.173.206/32	10.167.173.206 – 10.167.173.206	10.167.173.206
80	10.167.173.207/32	10.167.173.207 – 10.167.173.207	10.167.173.207
81	10.167.173.208/32	10.167.173.208 – 10.167.173.208	10.167.173.208
82	10.167.173.209/32	10.167.173.209 – 10.167.173.209	10.167.173.209
83	10.167.173.210/32	10.167.173.210 – 10.167.173.210	10.167.173.210
84	10.167.173.211/32	10.167.173.211 – 10.167.173.211	10.167.173.211
85	10.167.173.212/32	10.167.173.212 – 10.167.173.212	10.167.173.212
86	10.167.173.213/32	10.167.173.213 – 10.167.173.213	10.167.173.213
87	10.167.173.214/32	10.167.173.214 – 10.167.173.214	10.167.173.214
88	10.167.173.215/32	10.167.173.215 – 10.167.173.215	10.167.173.215
89	10.167.173.216/32	10.167.173.216 – 10.167.173.216	10.167.173.216
90	10.167.173.217/32	10.167.173.217 – 10.167.173.217	10.167.173.217
91	10.167.173.218/32	10.167.173.218 – 10.167.173.218	10.167.173.218
92	10.167.173.219/32	10.167.173.219 – 10.167.173.219	10.167.173.219
93	10.167.173.220/32	10.167.173.220 – 10.167.173.220	10.167.173.220
94	10.167.173.221/32	10.167.173.221 – 10.167.173.221	10.167.173.221
95	10.167.173.222/32	10.167.173.222 – 10.167.173.222	10.167.173.222
96	10.167.173.223/32	10.167.173.223 – 10.167.173.223	10.167.173.223
97	10.167.173.224/32	10.167.173.224 – 10.167.173.224	10.167.173.224
98	10.167.173.225/32	10.167.173.225 – 10.167.173.225	10.167.173.225
99	10.167.173.226/32	10.167.173.226 – 10.167.173.226	10.167.173.226
100	10.167.173.227/32	10.167.173.227 – 10.167.173.227	10.167.173.227
101	10.167.173.228/32	10.167.173.228 – 10.167.173.228	10.167.173.228
102	10.167.173.229/32	10.167.173.229 – 10.167.173.229	10.167.173.229
103	10.167.173.230/32	10.167.173.230 – 10.167.173.230	10.167.173.230
104	10.167.173.231/32	10.167.173.231 – 10.167.173.231	10.167.173.231
105	10.167.173.232/32	10.167.173.232 – 10.167.173.232	10.167.173.232
106	10.167.173.233/32	10.167.173.233 – 10.167.173.233	10.167.173.233
107	10.167.173.234/32	10.167.173.234 – 10.167.173.234	10.167.173.234
108	10.167.173.235/32	10.167.173.235 – 10.167.173.235	10.167.173.235
109	10.167.173.236/32	10.167.173.236 – 10.167.173.236	10.167.173.236
110	10.167.173.237/32	10.167.173.237 – 10.167.173.237	10.167.173.237
111	10.167.173.238/32	10.167.173.238 – 10.167.173.238	10.167.173.238
112	10.167.173.239/32	10.167.173.239 – 10.167.173.239	10.167.173.239
113	10.167.173.240/32	10.167.173.240 – 10.167.173.240	10.167.173.240
114	10.167.173.241/32	10.167.173.241 – 10.167.173.241	10.167.173.241
115	10.167.173.242/32	10.167.173.242 – 10.167.173.242	10.167.173.242
116	10.167.173.243/32	10.167.173.243 – 10.167.173.243	10.167.173.243
117	10.167.173.244/32	10.167.173.244 – 10.167.173.244	10.167.173.244
118	10.167.173.245/32	10.167.173.245 – 10.167.173.245	10.167.173.245
119	10.167.173.246/32	10.167.173.246 – 10.167.173.246	10.167.173.246
120	10.167.173.247/32	10.167.173.247 – 10.167.173.247	10.167.173.247
121	10.167.173.248/32	10.167.173.248 – 10.167.173.248	10.167.173.248
122	10.167.173.249/32	10.167.173.249 – 10.167.173.249	10.167.173.249
123	10.167.173.250/32	10.167.173.250 – 10.167.173.250	10.167.173.250
124	10.167.173.251/32	10.167.173.251 – 10.167.173.251	10.167.173.251
125	10.167.173.252/32	10.167.173.252 – 10.167.173.252	10.167.173.252
126	10.167.173.253/32	10.167.173.253 – 10.167.173.253	10.167.173.253
127	10.167.173.254/32	10.167.173.254 – 10.167.173.254	10.167.173.254
128	10.167.173.255/32	10.167.173.255 – 10.167.173.255	10.167.173.255

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 →