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)10.2.96.128/25

network10.2.96.128/25

broadcast10.2.96.255

first host10.2.96.129

last host10.2.96.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.96.128/25

address00001010.00000010.01100000.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.01100000.10000000

broadcast00001010.00000010.01100000.11111111

green = network part, grey = host part

hex0x0a026080

decimal167927936

reverse dns128.96.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:6080

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.96.128/32	10.2.96.128 – 10.2.96.128	10.2.96.128
2	10.2.96.129/32	10.2.96.129 – 10.2.96.129	10.2.96.129
3	10.2.96.130/32	10.2.96.130 – 10.2.96.130	10.2.96.130
4	10.2.96.131/32	10.2.96.131 – 10.2.96.131	10.2.96.131
5	10.2.96.132/32	10.2.96.132 – 10.2.96.132	10.2.96.132
6	10.2.96.133/32	10.2.96.133 – 10.2.96.133	10.2.96.133
7	10.2.96.134/32	10.2.96.134 – 10.2.96.134	10.2.96.134
8	10.2.96.135/32	10.2.96.135 – 10.2.96.135	10.2.96.135
9	10.2.96.136/32	10.2.96.136 – 10.2.96.136	10.2.96.136
10	10.2.96.137/32	10.2.96.137 – 10.2.96.137	10.2.96.137
11	10.2.96.138/32	10.2.96.138 – 10.2.96.138	10.2.96.138
12	10.2.96.139/32	10.2.96.139 – 10.2.96.139	10.2.96.139
13	10.2.96.140/32	10.2.96.140 – 10.2.96.140	10.2.96.140
14	10.2.96.141/32	10.2.96.141 – 10.2.96.141	10.2.96.141
15	10.2.96.142/32	10.2.96.142 – 10.2.96.142	10.2.96.142
16	10.2.96.143/32	10.2.96.143 – 10.2.96.143	10.2.96.143
17	10.2.96.144/32	10.2.96.144 – 10.2.96.144	10.2.96.144
18	10.2.96.145/32	10.2.96.145 – 10.2.96.145	10.2.96.145
19	10.2.96.146/32	10.2.96.146 – 10.2.96.146	10.2.96.146
20	10.2.96.147/32	10.2.96.147 – 10.2.96.147	10.2.96.147
21	10.2.96.148/32	10.2.96.148 – 10.2.96.148	10.2.96.148
22	10.2.96.149/32	10.2.96.149 – 10.2.96.149	10.2.96.149
23	10.2.96.150/32	10.2.96.150 – 10.2.96.150	10.2.96.150
24	10.2.96.151/32	10.2.96.151 – 10.2.96.151	10.2.96.151
25	10.2.96.152/32	10.2.96.152 – 10.2.96.152	10.2.96.152
26	10.2.96.153/32	10.2.96.153 – 10.2.96.153	10.2.96.153
27	10.2.96.154/32	10.2.96.154 – 10.2.96.154	10.2.96.154
28	10.2.96.155/32	10.2.96.155 – 10.2.96.155	10.2.96.155
29	10.2.96.156/32	10.2.96.156 – 10.2.96.156	10.2.96.156
30	10.2.96.157/32	10.2.96.157 – 10.2.96.157	10.2.96.157
31	10.2.96.158/32	10.2.96.158 – 10.2.96.158	10.2.96.158
32	10.2.96.159/32	10.2.96.159 – 10.2.96.159	10.2.96.159
33	10.2.96.160/32	10.2.96.160 – 10.2.96.160	10.2.96.160
34	10.2.96.161/32	10.2.96.161 – 10.2.96.161	10.2.96.161
35	10.2.96.162/32	10.2.96.162 – 10.2.96.162	10.2.96.162
36	10.2.96.163/32	10.2.96.163 – 10.2.96.163	10.2.96.163
37	10.2.96.164/32	10.2.96.164 – 10.2.96.164	10.2.96.164
38	10.2.96.165/32	10.2.96.165 – 10.2.96.165	10.2.96.165
39	10.2.96.166/32	10.2.96.166 – 10.2.96.166	10.2.96.166
40	10.2.96.167/32	10.2.96.167 – 10.2.96.167	10.2.96.167
41	10.2.96.168/32	10.2.96.168 – 10.2.96.168	10.2.96.168
42	10.2.96.169/32	10.2.96.169 – 10.2.96.169	10.2.96.169
43	10.2.96.170/32	10.2.96.170 – 10.2.96.170	10.2.96.170
44	10.2.96.171/32	10.2.96.171 – 10.2.96.171	10.2.96.171
45	10.2.96.172/32	10.2.96.172 – 10.2.96.172	10.2.96.172
46	10.2.96.173/32	10.2.96.173 – 10.2.96.173	10.2.96.173
47	10.2.96.174/32	10.2.96.174 – 10.2.96.174	10.2.96.174
48	10.2.96.175/32	10.2.96.175 – 10.2.96.175	10.2.96.175
49	10.2.96.176/32	10.2.96.176 – 10.2.96.176	10.2.96.176
50	10.2.96.177/32	10.2.96.177 – 10.2.96.177	10.2.96.177
51	10.2.96.178/32	10.2.96.178 – 10.2.96.178	10.2.96.178
52	10.2.96.179/32	10.2.96.179 – 10.2.96.179	10.2.96.179
53	10.2.96.180/32	10.2.96.180 – 10.2.96.180	10.2.96.180
54	10.2.96.181/32	10.2.96.181 – 10.2.96.181	10.2.96.181
55	10.2.96.182/32	10.2.96.182 – 10.2.96.182	10.2.96.182
56	10.2.96.183/32	10.2.96.183 – 10.2.96.183	10.2.96.183
57	10.2.96.184/32	10.2.96.184 – 10.2.96.184	10.2.96.184
58	10.2.96.185/32	10.2.96.185 – 10.2.96.185	10.2.96.185
59	10.2.96.186/32	10.2.96.186 – 10.2.96.186	10.2.96.186
60	10.2.96.187/32	10.2.96.187 – 10.2.96.187	10.2.96.187
61	10.2.96.188/32	10.2.96.188 – 10.2.96.188	10.2.96.188
62	10.2.96.189/32	10.2.96.189 – 10.2.96.189	10.2.96.189
63	10.2.96.190/32	10.2.96.190 – 10.2.96.190	10.2.96.190
64	10.2.96.191/32	10.2.96.191 – 10.2.96.191	10.2.96.191
65	10.2.96.192/32	10.2.96.192 – 10.2.96.192	10.2.96.192
66	10.2.96.193/32	10.2.96.193 – 10.2.96.193	10.2.96.193
67	10.2.96.194/32	10.2.96.194 – 10.2.96.194	10.2.96.194
68	10.2.96.195/32	10.2.96.195 – 10.2.96.195	10.2.96.195
69	10.2.96.196/32	10.2.96.196 – 10.2.96.196	10.2.96.196
70	10.2.96.197/32	10.2.96.197 – 10.2.96.197	10.2.96.197
71	10.2.96.198/32	10.2.96.198 – 10.2.96.198	10.2.96.198
72	10.2.96.199/32	10.2.96.199 – 10.2.96.199	10.2.96.199
73	10.2.96.200/32	10.2.96.200 – 10.2.96.200	10.2.96.200
74	10.2.96.201/32	10.2.96.201 – 10.2.96.201	10.2.96.201
75	10.2.96.202/32	10.2.96.202 – 10.2.96.202	10.2.96.202
76	10.2.96.203/32	10.2.96.203 – 10.2.96.203	10.2.96.203
77	10.2.96.204/32	10.2.96.204 – 10.2.96.204	10.2.96.204
78	10.2.96.205/32	10.2.96.205 – 10.2.96.205	10.2.96.205
79	10.2.96.206/32	10.2.96.206 – 10.2.96.206	10.2.96.206
80	10.2.96.207/32	10.2.96.207 – 10.2.96.207	10.2.96.207
81	10.2.96.208/32	10.2.96.208 – 10.2.96.208	10.2.96.208
82	10.2.96.209/32	10.2.96.209 – 10.2.96.209	10.2.96.209
83	10.2.96.210/32	10.2.96.210 – 10.2.96.210	10.2.96.210
84	10.2.96.211/32	10.2.96.211 – 10.2.96.211	10.2.96.211
85	10.2.96.212/32	10.2.96.212 – 10.2.96.212	10.2.96.212
86	10.2.96.213/32	10.2.96.213 – 10.2.96.213	10.2.96.213
87	10.2.96.214/32	10.2.96.214 – 10.2.96.214	10.2.96.214
88	10.2.96.215/32	10.2.96.215 – 10.2.96.215	10.2.96.215
89	10.2.96.216/32	10.2.96.216 – 10.2.96.216	10.2.96.216
90	10.2.96.217/32	10.2.96.217 – 10.2.96.217	10.2.96.217
91	10.2.96.218/32	10.2.96.218 – 10.2.96.218	10.2.96.218
92	10.2.96.219/32	10.2.96.219 – 10.2.96.219	10.2.96.219
93	10.2.96.220/32	10.2.96.220 – 10.2.96.220	10.2.96.220
94	10.2.96.221/32	10.2.96.221 – 10.2.96.221	10.2.96.221
95	10.2.96.222/32	10.2.96.222 – 10.2.96.222	10.2.96.222
96	10.2.96.223/32	10.2.96.223 – 10.2.96.223	10.2.96.223
97	10.2.96.224/32	10.2.96.224 – 10.2.96.224	10.2.96.224
98	10.2.96.225/32	10.2.96.225 – 10.2.96.225	10.2.96.225
99	10.2.96.226/32	10.2.96.226 – 10.2.96.226	10.2.96.226
100	10.2.96.227/32	10.2.96.227 – 10.2.96.227	10.2.96.227
101	10.2.96.228/32	10.2.96.228 – 10.2.96.228	10.2.96.228
102	10.2.96.229/32	10.2.96.229 – 10.2.96.229	10.2.96.229
103	10.2.96.230/32	10.2.96.230 – 10.2.96.230	10.2.96.230
104	10.2.96.231/32	10.2.96.231 – 10.2.96.231	10.2.96.231
105	10.2.96.232/32	10.2.96.232 – 10.2.96.232	10.2.96.232
106	10.2.96.233/32	10.2.96.233 – 10.2.96.233	10.2.96.233
107	10.2.96.234/32	10.2.96.234 – 10.2.96.234	10.2.96.234
108	10.2.96.235/32	10.2.96.235 – 10.2.96.235	10.2.96.235
109	10.2.96.236/32	10.2.96.236 – 10.2.96.236	10.2.96.236
110	10.2.96.237/32	10.2.96.237 – 10.2.96.237	10.2.96.237
111	10.2.96.238/32	10.2.96.238 – 10.2.96.238	10.2.96.238
112	10.2.96.239/32	10.2.96.239 – 10.2.96.239	10.2.96.239
113	10.2.96.240/32	10.2.96.240 – 10.2.96.240	10.2.96.240
114	10.2.96.241/32	10.2.96.241 – 10.2.96.241	10.2.96.241
115	10.2.96.242/32	10.2.96.242 – 10.2.96.242	10.2.96.242
116	10.2.96.243/32	10.2.96.243 – 10.2.96.243	10.2.96.243
117	10.2.96.244/32	10.2.96.244 – 10.2.96.244	10.2.96.244
118	10.2.96.245/32	10.2.96.245 – 10.2.96.245	10.2.96.245
119	10.2.96.246/32	10.2.96.246 – 10.2.96.246	10.2.96.246
120	10.2.96.247/32	10.2.96.247 – 10.2.96.247	10.2.96.247
121	10.2.96.248/32	10.2.96.248 – 10.2.96.248	10.2.96.248
122	10.2.96.249/32	10.2.96.249 – 10.2.96.249	10.2.96.249
123	10.2.96.250/32	10.2.96.250 – 10.2.96.250	10.2.96.250
124	10.2.96.251/32	10.2.96.251 – 10.2.96.251	10.2.96.251
125	10.2.96.252/32	10.2.96.252 – 10.2.96.252	10.2.96.252
126	10.2.96.253/32	10.2.96.253 – 10.2.96.253	10.2.96.253
127	10.2.96.254/32	10.2.96.254 – 10.2.96.254	10.2.96.254
128	10.2.96.255/32	10.2.96.255 – 10.2.96.255	10.2.96.255

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 →