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)10.2.53.128/25

network10.2.53.128/25

broadcast10.2.53.255

first host10.2.53.129

last host10.2.53.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.53.128/25

address00001010.00000010.00110101.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.00110101.10000000

broadcast00001010.00000010.00110101.11111111

green = network part, grey = host part

hex0x0a023580

decimal167916928

reverse dns128.53.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:3580

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.53.128/32	10.2.53.128 – 10.2.53.128	10.2.53.128
2	10.2.53.129/32	10.2.53.129 – 10.2.53.129	10.2.53.129
3	10.2.53.130/32	10.2.53.130 – 10.2.53.130	10.2.53.130
4	10.2.53.131/32	10.2.53.131 – 10.2.53.131	10.2.53.131
5	10.2.53.132/32	10.2.53.132 – 10.2.53.132	10.2.53.132
6	10.2.53.133/32	10.2.53.133 – 10.2.53.133	10.2.53.133
7	10.2.53.134/32	10.2.53.134 – 10.2.53.134	10.2.53.134
8	10.2.53.135/32	10.2.53.135 – 10.2.53.135	10.2.53.135
9	10.2.53.136/32	10.2.53.136 – 10.2.53.136	10.2.53.136
10	10.2.53.137/32	10.2.53.137 – 10.2.53.137	10.2.53.137
11	10.2.53.138/32	10.2.53.138 – 10.2.53.138	10.2.53.138
12	10.2.53.139/32	10.2.53.139 – 10.2.53.139	10.2.53.139
13	10.2.53.140/32	10.2.53.140 – 10.2.53.140	10.2.53.140
14	10.2.53.141/32	10.2.53.141 – 10.2.53.141	10.2.53.141
15	10.2.53.142/32	10.2.53.142 – 10.2.53.142	10.2.53.142
16	10.2.53.143/32	10.2.53.143 – 10.2.53.143	10.2.53.143
17	10.2.53.144/32	10.2.53.144 – 10.2.53.144	10.2.53.144
18	10.2.53.145/32	10.2.53.145 – 10.2.53.145	10.2.53.145
19	10.2.53.146/32	10.2.53.146 – 10.2.53.146	10.2.53.146
20	10.2.53.147/32	10.2.53.147 – 10.2.53.147	10.2.53.147
21	10.2.53.148/32	10.2.53.148 – 10.2.53.148	10.2.53.148
22	10.2.53.149/32	10.2.53.149 – 10.2.53.149	10.2.53.149
23	10.2.53.150/32	10.2.53.150 – 10.2.53.150	10.2.53.150
24	10.2.53.151/32	10.2.53.151 – 10.2.53.151	10.2.53.151
25	10.2.53.152/32	10.2.53.152 – 10.2.53.152	10.2.53.152
26	10.2.53.153/32	10.2.53.153 – 10.2.53.153	10.2.53.153
27	10.2.53.154/32	10.2.53.154 – 10.2.53.154	10.2.53.154
28	10.2.53.155/32	10.2.53.155 – 10.2.53.155	10.2.53.155
29	10.2.53.156/32	10.2.53.156 – 10.2.53.156	10.2.53.156
30	10.2.53.157/32	10.2.53.157 – 10.2.53.157	10.2.53.157
31	10.2.53.158/32	10.2.53.158 – 10.2.53.158	10.2.53.158
32	10.2.53.159/32	10.2.53.159 – 10.2.53.159	10.2.53.159
33	10.2.53.160/32	10.2.53.160 – 10.2.53.160	10.2.53.160
34	10.2.53.161/32	10.2.53.161 – 10.2.53.161	10.2.53.161
35	10.2.53.162/32	10.2.53.162 – 10.2.53.162	10.2.53.162
36	10.2.53.163/32	10.2.53.163 – 10.2.53.163	10.2.53.163
37	10.2.53.164/32	10.2.53.164 – 10.2.53.164	10.2.53.164
38	10.2.53.165/32	10.2.53.165 – 10.2.53.165	10.2.53.165
39	10.2.53.166/32	10.2.53.166 – 10.2.53.166	10.2.53.166
40	10.2.53.167/32	10.2.53.167 – 10.2.53.167	10.2.53.167
41	10.2.53.168/32	10.2.53.168 – 10.2.53.168	10.2.53.168
42	10.2.53.169/32	10.2.53.169 – 10.2.53.169	10.2.53.169
43	10.2.53.170/32	10.2.53.170 – 10.2.53.170	10.2.53.170
44	10.2.53.171/32	10.2.53.171 – 10.2.53.171	10.2.53.171
45	10.2.53.172/32	10.2.53.172 – 10.2.53.172	10.2.53.172
46	10.2.53.173/32	10.2.53.173 – 10.2.53.173	10.2.53.173
47	10.2.53.174/32	10.2.53.174 – 10.2.53.174	10.2.53.174
48	10.2.53.175/32	10.2.53.175 – 10.2.53.175	10.2.53.175
49	10.2.53.176/32	10.2.53.176 – 10.2.53.176	10.2.53.176
50	10.2.53.177/32	10.2.53.177 – 10.2.53.177	10.2.53.177
51	10.2.53.178/32	10.2.53.178 – 10.2.53.178	10.2.53.178
52	10.2.53.179/32	10.2.53.179 – 10.2.53.179	10.2.53.179
53	10.2.53.180/32	10.2.53.180 – 10.2.53.180	10.2.53.180
54	10.2.53.181/32	10.2.53.181 – 10.2.53.181	10.2.53.181
55	10.2.53.182/32	10.2.53.182 – 10.2.53.182	10.2.53.182
56	10.2.53.183/32	10.2.53.183 – 10.2.53.183	10.2.53.183
57	10.2.53.184/32	10.2.53.184 – 10.2.53.184	10.2.53.184
58	10.2.53.185/32	10.2.53.185 – 10.2.53.185	10.2.53.185
59	10.2.53.186/32	10.2.53.186 – 10.2.53.186	10.2.53.186
60	10.2.53.187/32	10.2.53.187 – 10.2.53.187	10.2.53.187
61	10.2.53.188/32	10.2.53.188 – 10.2.53.188	10.2.53.188
62	10.2.53.189/32	10.2.53.189 – 10.2.53.189	10.2.53.189
63	10.2.53.190/32	10.2.53.190 – 10.2.53.190	10.2.53.190
64	10.2.53.191/32	10.2.53.191 – 10.2.53.191	10.2.53.191
65	10.2.53.192/32	10.2.53.192 – 10.2.53.192	10.2.53.192
66	10.2.53.193/32	10.2.53.193 – 10.2.53.193	10.2.53.193
67	10.2.53.194/32	10.2.53.194 – 10.2.53.194	10.2.53.194
68	10.2.53.195/32	10.2.53.195 – 10.2.53.195	10.2.53.195
69	10.2.53.196/32	10.2.53.196 – 10.2.53.196	10.2.53.196
70	10.2.53.197/32	10.2.53.197 – 10.2.53.197	10.2.53.197
71	10.2.53.198/32	10.2.53.198 – 10.2.53.198	10.2.53.198
72	10.2.53.199/32	10.2.53.199 – 10.2.53.199	10.2.53.199
73	10.2.53.200/32	10.2.53.200 – 10.2.53.200	10.2.53.200
74	10.2.53.201/32	10.2.53.201 – 10.2.53.201	10.2.53.201
75	10.2.53.202/32	10.2.53.202 – 10.2.53.202	10.2.53.202
76	10.2.53.203/32	10.2.53.203 – 10.2.53.203	10.2.53.203
77	10.2.53.204/32	10.2.53.204 – 10.2.53.204	10.2.53.204
78	10.2.53.205/32	10.2.53.205 – 10.2.53.205	10.2.53.205
79	10.2.53.206/32	10.2.53.206 – 10.2.53.206	10.2.53.206
80	10.2.53.207/32	10.2.53.207 – 10.2.53.207	10.2.53.207
81	10.2.53.208/32	10.2.53.208 – 10.2.53.208	10.2.53.208
82	10.2.53.209/32	10.2.53.209 – 10.2.53.209	10.2.53.209
83	10.2.53.210/32	10.2.53.210 – 10.2.53.210	10.2.53.210
84	10.2.53.211/32	10.2.53.211 – 10.2.53.211	10.2.53.211
85	10.2.53.212/32	10.2.53.212 – 10.2.53.212	10.2.53.212
86	10.2.53.213/32	10.2.53.213 – 10.2.53.213	10.2.53.213
87	10.2.53.214/32	10.2.53.214 – 10.2.53.214	10.2.53.214
88	10.2.53.215/32	10.2.53.215 – 10.2.53.215	10.2.53.215
89	10.2.53.216/32	10.2.53.216 – 10.2.53.216	10.2.53.216
90	10.2.53.217/32	10.2.53.217 – 10.2.53.217	10.2.53.217
91	10.2.53.218/32	10.2.53.218 – 10.2.53.218	10.2.53.218
92	10.2.53.219/32	10.2.53.219 – 10.2.53.219	10.2.53.219
93	10.2.53.220/32	10.2.53.220 – 10.2.53.220	10.2.53.220
94	10.2.53.221/32	10.2.53.221 – 10.2.53.221	10.2.53.221
95	10.2.53.222/32	10.2.53.222 – 10.2.53.222	10.2.53.222
96	10.2.53.223/32	10.2.53.223 – 10.2.53.223	10.2.53.223
97	10.2.53.224/32	10.2.53.224 – 10.2.53.224	10.2.53.224
98	10.2.53.225/32	10.2.53.225 – 10.2.53.225	10.2.53.225
99	10.2.53.226/32	10.2.53.226 – 10.2.53.226	10.2.53.226
100	10.2.53.227/32	10.2.53.227 – 10.2.53.227	10.2.53.227
101	10.2.53.228/32	10.2.53.228 – 10.2.53.228	10.2.53.228
102	10.2.53.229/32	10.2.53.229 – 10.2.53.229	10.2.53.229
103	10.2.53.230/32	10.2.53.230 – 10.2.53.230	10.2.53.230
104	10.2.53.231/32	10.2.53.231 – 10.2.53.231	10.2.53.231
105	10.2.53.232/32	10.2.53.232 – 10.2.53.232	10.2.53.232
106	10.2.53.233/32	10.2.53.233 – 10.2.53.233	10.2.53.233
107	10.2.53.234/32	10.2.53.234 – 10.2.53.234	10.2.53.234
108	10.2.53.235/32	10.2.53.235 – 10.2.53.235	10.2.53.235
109	10.2.53.236/32	10.2.53.236 – 10.2.53.236	10.2.53.236
110	10.2.53.237/32	10.2.53.237 – 10.2.53.237	10.2.53.237
111	10.2.53.238/32	10.2.53.238 – 10.2.53.238	10.2.53.238
112	10.2.53.239/32	10.2.53.239 – 10.2.53.239	10.2.53.239
113	10.2.53.240/32	10.2.53.240 – 10.2.53.240	10.2.53.240
114	10.2.53.241/32	10.2.53.241 – 10.2.53.241	10.2.53.241
115	10.2.53.242/32	10.2.53.242 – 10.2.53.242	10.2.53.242
116	10.2.53.243/32	10.2.53.243 – 10.2.53.243	10.2.53.243
117	10.2.53.244/32	10.2.53.244 – 10.2.53.244	10.2.53.244
118	10.2.53.245/32	10.2.53.245 – 10.2.53.245	10.2.53.245
119	10.2.53.246/32	10.2.53.246 – 10.2.53.246	10.2.53.246
120	10.2.53.247/32	10.2.53.247 – 10.2.53.247	10.2.53.247
121	10.2.53.248/32	10.2.53.248 – 10.2.53.248	10.2.53.248
122	10.2.53.249/32	10.2.53.249 – 10.2.53.249	10.2.53.249
123	10.2.53.250/32	10.2.53.250 – 10.2.53.250	10.2.53.250
124	10.2.53.251/32	10.2.53.251 – 10.2.53.251	10.2.53.251
125	10.2.53.252/32	10.2.53.252 – 10.2.53.252	10.2.53.252
126	10.2.53.253/32	10.2.53.253 – 10.2.53.253	10.2.53.253
127	10.2.53.254/32	10.2.53.254 – 10.2.53.254	10.2.53.254
128	10.2.53.255/32	10.2.53.255 – 10.2.53.255	10.2.53.255

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 →