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)10.2.60.128/25

network10.2.60.128/25

broadcast10.2.60.255

first host10.2.60.129

last host10.2.60.254

subnet mask255.255.255.128

wildcard0.0.0.127

addresses128

usable hosts126

classA

ipcalc 10.2.60.128/25

address00001010.00000010.00111100.10000000

subnet mask11111111.11111111.11111111.10000000

network00001010.00000010.00111100.10000000

broadcast00001010.00000010.00111100.11111111

green = network part, grey = host part

hex0x0a023c80

decimal167918720

reverse dns128.60.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:3c80

/25 split into /32 · 128 subnets

close ×

#	network	host range	broadcast
1	10.2.60.128/32	10.2.60.128 – 10.2.60.128	10.2.60.128
2	10.2.60.129/32	10.2.60.129 – 10.2.60.129	10.2.60.129
3	10.2.60.130/32	10.2.60.130 – 10.2.60.130	10.2.60.130
4	10.2.60.131/32	10.2.60.131 – 10.2.60.131	10.2.60.131
5	10.2.60.132/32	10.2.60.132 – 10.2.60.132	10.2.60.132
6	10.2.60.133/32	10.2.60.133 – 10.2.60.133	10.2.60.133
7	10.2.60.134/32	10.2.60.134 – 10.2.60.134	10.2.60.134
8	10.2.60.135/32	10.2.60.135 – 10.2.60.135	10.2.60.135
9	10.2.60.136/32	10.2.60.136 – 10.2.60.136	10.2.60.136
10	10.2.60.137/32	10.2.60.137 – 10.2.60.137	10.2.60.137
11	10.2.60.138/32	10.2.60.138 – 10.2.60.138	10.2.60.138
12	10.2.60.139/32	10.2.60.139 – 10.2.60.139	10.2.60.139
13	10.2.60.140/32	10.2.60.140 – 10.2.60.140	10.2.60.140
14	10.2.60.141/32	10.2.60.141 – 10.2.60.141	10.2.60.141
15	10.2.60.142/32	10.2.60.142 – 10.2.60.142	10.2.60.142
16	10.2.60.143/32	10.2.60.143 – 10.2.60.143	10.2.60.143
17	10.2.60.144/32	10.2.60.144 – 10.2.60.144	10.2.60.144
18	10.2.60.145/32	10.2.60.145 – 10.2.60.145	10.2.60.145
19	10.2.60.146/32	10.2.60.146 – 10.2.60.146	10.2.60.146
20	10.2.60.147/32	10.2.60.147 – 10.2.60.147	10.2.60.147
21	10.2.60.148/32	10.2.60.148 – 10.2.60.148	10.2.60.148
22	10.2.60.149/32	10.2.60.149 – 10.2.60.149	10.2.60.149
23	10.2.60.150/32	10.2.60.150 – 10.2.60.150	10.2.60.150
24	10.2.60.151/32	10.2.60.151 – 10.2.60.151	10.2.60.151
25	10.2.60.152/32	10.2.60.152 – 10.2.60.152	10.2.60.152
26	10.2.60.153/32	10.2.60.153 – 10.2.60.153	10.2.60.153
27	10.2.60.154/32	10.2.60.154 – 10.2.60.154	10.2.60.154
28	10.2.60.155/32	10.2.60.155 – 10.2.60.155	10.2.60.155
29	10.2.60.156/32	10.2.60.156 – 10.2.60.156	10.2.60.156
30	10.2.60.157/32	10.2.60.157 – 10.2.60.157	10.2.60.157
31	10.2.60.158/32	10.2.60.158 – 10.2.60.158	10.2.60.158
32	10.2.60.159/32	10.2.60.159 – 10.2.60.159	10.2.60.159
33	10.2.60.160/32	10.2.60.160 – 10.2.60.160	10.2.60.160
34	10.2.60.161/32	10.2.60.161 – 10.2.60.161	10.2.60.161
35	10.2.60.162/32	10.2.60.162 – 10.2.60.162	10.2.60.162
36	10.2.60.163/32	10.2.60.163 – 10.2.60.163	10.2.60.163
37	10.2.60.164/32	10.2.60.164 – 10.2.60.164	10.2.60.164
38	10.2.60.165/32	10.2.60.165 – 10.2.60.165	10.2.60.165
39	10.2.60.166/32	10.2.60.166 – 10.2.60.166	10.2.60.166
40	10.2.60.167/32	10.2.60.167 – 10.2.60.167	10.2.60.167
41	10.2.60.168/32	10.2.60.168 – 10.2.60.168	10.2.60.168
42	10.2.60.169/32	10.2.60.169 – 10.2.60.169	10.2.60.169
43	10.2.60.170/32	10.2.60.170 – 10.2.60.170	10.2.60.170
44	10.2.60.171/32	10.2.60.171 – 10.2.60.171	10.2.60.171
45	10.2.60.172/32	10.2.60.172 – 10.2.60.172	10.2.60.172
46	10.2.60.173/32	10.2.60.173 – 10.2.60.173	10.2.60.173
47	10.2.60.174/32	10.2.60.174 – 10.2.60.174	10.2.60.174
48	10.2.60.175/32	10.2.60.175 – 10.2.60.175	10.2.60.175
49	10.2.60.176/32	10.2.60.176 – 10.2.60.176	10.2.60.176
50	10.2.60.177/32	10.2.60.177 – 10.2.60.177	10.2.60.177
51	10.2.60.178/32	10.2.60.178 – 10.2.60.178	10.2.60.178
52	10.2.60.179/32	10.2.60.179 – 10.2.60.179	10.2.60.179
53	10.2.60.180/32	10.2.60.180 – 10.2.60.180	10.2.60.180
54	10.2.60.181/32	10.2.60.181 – 10.2.60.181	10.2.60.181
55	10.2.60.182/32	10.2.60.182 – 10.2.60.182	10.2.60.182
56	10.2.60.183/32	10.2.60.183 – 10.2.60.183	10.2.60.183
57	10.2.60.184/32	10.2.60.184 – 10.2.60.184	10.2.60.184
58	10.2.60.185/32	10.2.60.185 – 10.2.60.185	10.2.60.185
59	10.2.60.186/32	10.2.60.186 – 10.2.60.186	10.2.60.186
60	10.2.60.187/32	10.2.60.187 – 10.2.60.187	10.2.60.187
61	10.2.60.188/32	10.2.60.188 – 10.2.60.188	10.2.60.188
62	10.2.60.189/32	10.2.60.189 – 10.2.60.189	10.2.60.189
63	10.2.60.190/32	10.2.60.190 – 10.2.60.190	10.2.60.190
64	10.2.60.191/32	10.2.60.191 – 10.2.60.191	10.2.60.191
65	10.2.60.192/32	10.2.60.192 – 10.2.60.192	10.2.60.192
66	10.2.60.193/32	10.2.60.193 – 10.2.60.193	10.2.60.193
67	10.2.60.194/32	10.2.60.194 – 10.2.60.194	10.2.60.194
68	10.2.60.195/32	10.2.60.195 – 10.2.60.195	10.2.60.195
69	10.2.60.196/32	10.2.60.196 – 10.2.60.196	10.2.60.196
70	10.2.60.197/32	10.2.60.197 – 10.2.60.197	10.2.60.197
71	10.2.60.198/32	10.2.60.198 – 10.2.60.198	10.2.60.198
72	10.2.60.199/32	10.2.60.199 – 10.2.60.199	10.2.60.199
73	10.2.60.200/32	10.2.60.200 – 10.2.60.200	10.2.60.200
74	10.2.60.201/32	10.2.60.201 – 10.2.60.201	10.2.60.201
75	10.2.60.202/32	10.2.60.202 – 10.2.60.202	10.2.60.202
76	10.2.60.203/32	10.2.60.203 – 10.2.60.203	10.2.60.203
77	10.2.60.204/32	10.2.60.204 – 10.2.60.204	10.2.60.204
78	10.2.60.205/32	10.2.60.205 – 10.2.60.205	10.2.60.205
79	10.2.60.206/32	10.2.60.206 – 10.2.60.206	10.2.60.206
80	10.2.60.207/32	10.2.60.207 – 10.2.60.207	10.2.60.207
81	10.2.60.208/32	10.2.60.208 – 10.2.60.208	10.2.60.208
82	10.2.60.209/32	10.2.60.209 – 10.2.60.209	10.2.60.209
83	10.2.60.210/32	10.2.60.210 – 10.2.60.210	10.2.60.210
84	10.2.60.211/32	10.2.60.211 – 10.2.60.211	10.2.60.211
85	10.2.60.212/32	10.2.60.212 – 10.2.60.212	10.2.60.212
86	10.2.60.213/32	10.2.60.213 – 10.2.60.213	10.2.60.213
87	10.2.60.214/32	10.2.60.214 – 10.2.60.214	10.2.60.214
88	10.2.60.215/32	10.2.60.215 – 10.2.60.215	10.2.60.215
89	10.2.60.216/32	10.2.60.216 – 10.2.60.216	10.2.60.216
90	10.2.60.217/32	10.2.60.217 – 10.2.60.217	10.2.60.217
91	10.2.60.218/32	10.2.60.218 – 10.2.60.218	10.2.60.218
92	10.2.60.219/32	10.2.60.219 – 10.2.60.219	10.2.60.219
93	10.2.60.220/32	10.2.60.220 – 10.2.60.220	10.2.60.220
94	10.2.60.221/32	10.2.60.221 – 10.2.60.221	10.2.60.221
95	10.2.60.222/32	10.2.60.222 – 10.2.60.222	10.2.60.222
96	10.2.60.223/32	10.2.60.223 – 10.2.60.223	10.2.60.223
97	10.2.60.224/32	10.2.60.224 – 10.2.60.224	10.2.60.224
98	10.2.60.225/32	10.2.60.225 – 10.2.60.225	10.2.60.225
99	10.2.60.226/32	10.2.60.226 – 10.2.60.226	10.2.60.226
100	10.2.60.227/32	10.2.60.227 – 10.2.60.227	10.2.60.227
101	10.2.60.228/32	10.2.60.228 – 10.2.60.228	10.2.60.228
102	10.2.60.229/32	10.2.60.229 – 10.2.60.229	10.2.60.229
103	10.2.60.230/32	10.2.60.230 – 10.2.60.230	10.2.60.230
104	10.2.60.231/32	10.2.60.231 – 10.2.60.231	10.2.60.231
105	10.2.60.232/32	10.2.60.232 – 10.2.60.232	10.2.60.232
106	10.2.60.233/32	10.2.60.233 – 10.2.60.233	10.2.60.233
107	10.2.60.234/32	10.2.60.234 – 10.2.60.234	10.2.60.234
108	10.2.60.235/32	10.2.60.235 – 10.2.60.235	10.2.60.235
109	10.2.60.236/32	10.2.60.236 – 10.2.60.236	10.2.60.236
110	10.2.60.237/32	10.2.60.237 – 10.2.60.237	10.2.60.237
111	10.2.60.238/32	10.2.60.238 – 10.2.60.238	10.2.60.238
112	10.2.60.239/32	10.2.60.239 – 10.2.60.239	10.2.60.239
113	10.2.60.240/32	10.2.60.240 – 10.2.60.240	10.2.60.240
114	10.2.60.241/32	10.2.60.241 – 10.2.60.241	10.2.60.241
115	10.2.60.242/32	10.2.60.242 – 10.2.60.242	10.2.60.242
116	10.2.60.243/32	10.2.60.243 – 10.2.60.243	10.2.60.243
117	10.2.60.244/32	10.2.60.244 – 10.2.60.244	10.2.60.244
118	10.2.60.245/32	10.2.60.245 – 10.2.60.245	10.2.60.245
119	10.2.60.246/32	10.2.60.246 – 10.2.60.246	10.2.60.246
120	10.2.60.247/32	10.2.60.247 – 10.2.60.247	10.2.60.247
121	10.2.60.248/32	10.2.60.248 – 10.2.60.248	10.2.60.248
122	10.2.60.249/32	10.2.60.249 – 10.2.60.249	10.2.60.249
123	10.2.60.250/32	10.2.60.250 – 10.2.60.250	10.2.60.250
124	10.2.60.251/32	10.2.60.251 – 10.2.60.251	10.2.60.251
125	10.2.60.252/32	10.2.60.252 – 10.2.60.252	10.2.60.252
126	10.2.60.253/32	10.2.60.253 – 10.2.60.253	10.2.60.253
127	10.2.60.254/32	10.2.60.254 – 10.2.60.254	10.2.60.254
128	10.2.60.255/32	10.2.60.255 – 10.2.60.255	10.2.60.255

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 →