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)10.96.67.128/25

network10.96.67.128/25

broadcast10.96.67.255

first host10.96.67.129

last host10.96.67.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.96.67.128/25

address00001010.01100000.01000011.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.01100000.01000011.10000000

broadcast00001010.01100000.01000011.11111111

green = network part, grey = host part

hex0x0a604380

decimal174080896

reverse dns128.67.96.10.in-addr.arpa

ipv4-mapped::ffff:a60:4380

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.96.67.128/32	10.96.67.128 – 10.96.67.128	10.96.67.128
2	10.96.67.129/32	10.96.67.129 – 10.96.67.129	10.96.67.129
3	10.96.67.130/32	10.96.67.130 – 10.96.67.130	10.96.67.130
4	10.96.67.131/32	10.96.67.131 – 10.96.67.131	10.96.67.131
5	10.96.67.132/32	10.96.67.132 – 10.96.67.132	10.96.67.132
6	10.96.67.133/32	10.96.67.133 – 10.96.67.133	10.96.67.133
7	10.96.67.134/32	10.96.67.134 – 10.96.67.134	10.96.67.134
8	10.96.67.135/32	10.96.67.135 – 10.96.67.135	10.96.67.135
9	10.96.67.136/32	10.96.67.136 – 10.96.67.136	10.96.67.136
10	10.96.67.137/32	10.96.67.137 – 10.96.67.137	10.96.67.137
11	10.96.67.138/32	10.96.67.138 – 10.96.67.138	10.96.67.138
12	10.96.67.139/32	10.96.67.139 – 10.96.67.139	10.96.67.139
13	10.96.67.140/32	10.96.67.140 – 10.96.67.140	10.96.67.140
14	10.96.67.141/32	10.96.67.141 – 10.96.67.141	10.96.67.141
15	10.96.67.142/32	10.96.67.142 – 10.96.67.142	10.96.67.142
16	10.96.67.143/32	10.96.67.143 – 10.96.67.143	10.96.67.143
17	10.96.67.144/32	10.96.67.144 – 10.96.67.144	10.96.67.144
18	10.96.67.145/32	10.96.67.145 – 10.96.67.145	10.96.67.145
19	10.96.67.146/32	10.96.67.146 – 10.96.67.146	10.96.67.146
20	10.96.67.147/32	10.96.67.147 – 10.96.67.147	10.96.67.147
21	10.96.67.148/32	10.96.67.148 – 10.96.67.148	10.96.67.148
22	10.96.67.149/32	10.96.67.149 – 10.96.67.149	10.96.67.149
23	10.96.67.150/32	10.96.67.150 – 10.96.67.150	10.96.67.150
24	10.96.67.151/32	10.96.67.151 – 10.96.67.151	10.96.67.151
25	10.96.67.152/32	10.96.67.152 – 10.96.67.152	10.96.67.152
26	10.96.67.153/32	10.96.67.153 – 10.96.67.153	10.96.67.153
27	10.96.67.154/32	10.96.67.154 – 10.96.67.154	10.96.67.154
28	10.96.67.155/32	10.96.67.155 – 10.96.67.155	10.96.67.155
29	10.96.67.156/32	10.96.67.156 – 10.96.67.156	10.96.67.156
30	10.96.67.157/32	10.96.67.157 – 10.96.67.157	10.96.67.157
31	10.96.67.158/32	10.96.67.158 – 10.96.67.158	10.96.67.158
32	10.96.67.159/32	10.96.67.159 – 10.96.67.159	10.96.67.159
33	10.96.67.160/32	10.96.67.160 – 10.96.67.160	10.96.67.160
34	10.96.67.161/32	10.96.67.161 – 10.96.67.161	10.96.67.161
35	10.96.67.162/32	10.96.67.162 – 10.96.67.162	10.96.67.162
36	10.96.67.163/32	10.96.67.163 – 10.96.67.163	10.96.67.163
37	10.96.67.164/32	10.96.67.164 – 10.96.67.164	10.96.67.164
38	10.96.67.165/32	10.96.67.165 – 10.96.67.165	10.96.67.165
39	10.96.67.166/32	10.96.67.166 – 10.96.67.166	10.96.67.166
40	10.96.67.167/32	10.96.67.167 – 10.96.67.167	10.96.67.167
41	10.96.67.168/32	10.96.67.168 – 10.96.67.168	10.96.67.168
42	10.96.67.169/32	10.96.67.169 – 10.96.67.169	10.96.67.169
43	10.96.67.170/32	10.96.67.170 – 10.96.67.170	10.96.67.170
44	10.96.67.171/32	10.96.67.171 – 10.96.67.171	10.96.67.171
45	10.96.67.172/32	10.96.67.172 – 10.96.67.172	10.96.67.172
46	10.96.67.173/32	10.96.67.173 – 10.96.67.173	10.96.67.173
47	10.96.67.174/32	10.96.67.174 – 10.96.67.174	10.96.67.174
48	10.96.67.175/32	10.96.67.175 – 10.96.67.175	10.96.67.175
49	10.96.67.176/32	10.96.67.176 – 10.96.67.176	10.96.67.176
50	10.96.67.177/32	10.96.67.177 – 10.96.67.177	10.96.67.177
51	10.96.67.178/32	10.96.67.178 – 10.96.67.178	10.96.67.178
52	10.96.67.179/32	10.96.67.179 – 10.96.67.179	10.96.67.179
53	10.96.67.180/32	10.96.67.180 – 10.96.67.180	10.96.67.180
54	10.96.67.181/32	10.96.67.181 – 10.96.67.181	10.96.67.181
55	10.96.67.182/32	10.96.67.182 – 10.96.67.182	10.96.67.182
56	10.96.67.183/32	10.96.67.183 – 10.96.67.183	10.96.67.183
57	10.96.67.184/32	10.96.67.184 – 10.96.67.184	10.96.67.184
58	10.96.67.185/32	10.96.67.185 – 10.96.67.185	10.96.67.185
59	10.96.67.186/32	10.96.67.186 – 10.96.67.186	10.96.67.186
60	10.96.67.187/32	10.96.67.187 – 10.96.67.187	10.96.67.187
61	10.96.67.188/32	10.96.67.188 – 10.96.67.188	10.96.67.188
62	10.96.67.189/32	10.96.67.189 – 10.96.67.189	10.96.67.189
63	10.96.67.190/32	10.96.67.190 – 10.96.67.190	10.96.67.190
64	10.96.67.191/32	10.96.67.191 – 10.96.67.191	10.96.67.191
65	10.96.67.192/32	10.96.67.192 – 10.96.67.192	10.96.67.192
66	10.96.67.193/32	10.96.67.193 – 10.96.67.193	10.96.67.193
67	10.96.67.194/32	10.96.67.194 – 10.96.67.194	10.96.67.194
68	10.96.67.195/32	10.96.67.195 – 10.96.67.195	10.96.67.195
69	10.96.67.196/32	10.96.67.196 – 10.96.67.196	10.96.67.196
70	10.96.67.197/32	10.96.67.197 – 10.96.67.197	10.96.67.197
71	10.96.67.198/32	10.96.67.198 – 10.96.67.198	10.96.67.198
72	10.96.67.199/32	10.96.67.199 – 10.96.67.199	10.96.67.199
73	10.96.67.200/32	10.96.67.200 – 10.96.67.200	10.96.67.200
74	10.96.67.201/32	10.96.67.201 – 10.96.67.201	10.96.67.201
75	10.96.67.202/32	10.96.67.202 – 10.96.67.202	10.96.67.202
76	10.96.67.203/32	10.96.67.203 – 10.96.67.203	10.96.67.203
77	10.96.67.204/32	10.96.67.204 – 10.96.67.204	10.96.67.204
78	10.96.67.205/32	10.96.67.205 – 10.96.67.205	10.96.67.205
79	10.96.67.206/32	10.96.67.206 – 10.96.67.206	10.96.67.206
80	10.96.67.207/32	10.96.67.207 – 10.96.67.207	10.96.67.207
81	10.96.67.208/32	10.96.67.208 – 10.96.67.208	10.96.67.208
82	10.96.67.209/32	10.96.67.209 – 10.96.67.209	10.96.67.209
83	10.96.67.210/32	10.96.67.210 – 10.96.67.210	10.96.67.210
84	10.96.67.211/32	10.96.67.211 – 10.96.67.211	10.96.67.211
85	10.96.67.212/32	10.96.67.212 – 10.96.67.212	10.96.67.212
86	10.96.67.213/32	10.96.67.213 – 10.96.67.213	10.96.67.213
87	10.96.67.214/32	10.96.67.214 – 10.96.67.214	10.96.67.214
88	10.96.67.215/32	10.96.67.215 – 10.96.67.215	10.96.67.215
89	10.96.67.216/32	10.96.67.216 – 10.96.67.216	10.96.67.216
90	10.96.67.217/32	10.96.67.217 – 10.96.67.217	10.96.67.217
91	10.96.67.218/32	10.96.67.218 – 10.96.67.218	10.96.67.218
92	10.96.67.219/32	10.96.67.219 – 10.96.67.219	10.96.67.219
93	10.96.67.220/32	10.96.67.220 – 10.96.67.220	10.96.67.220
94	10.96.67.221/32	10.96.67.221 – 10.96.67.221	10.96.67.221
95	10.96.67.222/32	10.96.67.222 – 10.96.67.222	10.96.67.222
96	10.96.67.223/32	10.96.67.223 – 10.96.67.223	10.96.67.223
97	10.96.67.224/32	10.96.67.224 – 10.96.67.224	10.96.67.224
98	10.96.67.225/32	10.96.67.225 – 10.96.67.225	10.96.67.225
99	10.96.67.226/32	10.96.67.226 – 10.96.67.226	10.96.67.226
100	10.96.67.227/32	10.96.67.227 – 10.96.67.227	10.96.67.227
101	10.96.67.228/32	10.96.67.228 – 10.96.67.228	10.96.67.228
102	10.96.67.229/32	10.96.67.229 – 10.96.67.229	10.96.67.229
103	10.96.67.230/32	10.96.67.230 – 10.96.67.230	10.96.67.230
104	10.96.67.231/32	10.96.67.231 – 10.96.67.231	10.96.67.231
105	10.96.67.232/32	10.96.67.232 – 10.96.67.232	10.96.67.232
106	10.96.67.233/32	10.96.67.233 – 10.96.67.233	10.96.67.233
107	10.96.67.234/32	10.96.67.234 – 10.96.67.234	10.96.67.234
108	10.96.67.235/32	10.96.67.235 – 10.96.67.235	10.96.67.235
109	10.96.67.236/32	10.96.67.236 – 10.96.67.236	10.96.67.236
110	10.96.67.237/32	10.96.67.237 – 10.96.67.237	10.96.67.237
111	10.96.67.238/32	10.96.67.238 – 10.96.67.238	10.96.67.238
112	10.96.67.239/32	10.96.67.239 – 10.96.67.239	10.96.67.239
113	10.96.67.240/32	10.96.67.240 – 10.96.67.240	10.96.67.240
114	10.96.67.241/32	10.96.67.241 – 10.96.67.241	10.96.67.241
115	10.96.67.242/32	10.96.67.242 – 10.96.67.242	10.96.67.242
116	10.96.67.243/32	10.96.67.243 – 10.96.67.243	10.96.67.243
117	10.96.67.244/32	10.96.67.244 – 10.96.67.244	10.96.67.244
118	10.96.67.245/32	10.96.67.245 – 10.96.67.245	10.96.67.245
119	10.96.67.246/32	10.96.67.246 – 10.96.67.246	10.96.67.246
120	10.96.67.247/32	10.96.67.247 – 10.96.67.247	10.96.67.247
121	10.96.67.248/32	10.96.67.248 – 10.96.67.248	10.96.67.248
122	10.96.67.249/32	10.96.67.249 – 10.96.67.249	10.96.67.249
123	10.96.67.250/32	10.96.67.250 – 10.96.67.250	10.96.67.250
124	10.96.67.251/32	10.96.67.251 – 10.96.67.251	10.96.67.251
125	10.96.67.252/32	10.96.67.252 – 10.96.67.252	10.96.67.252
126	10.96.67.253/32	10.96.67.253 – 10.96.67.253	10.96.67.253
127	10.96.67.254/32	10.96.67.254 – 10.96.67.254	10.96.67.254
128	10.96.67.255/32	10.96.67.255 – 10.96.67.255	10.96.67.255

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 →