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)10.2.148.0/24

network10.2.148.0/24

broadcast10.2.148.255

first host10.2.148.1

last host10.2.148.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.148.0/24

address00001010.00000010.10010100.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.10010100.00000000

broadcast00001010.00000010.10010100.11111111

green = network part, grey = host part

hex0x0a029400

decimal167941120

reverse dns0.148.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:9400

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.148.0/32	10.2.148.0 – 10.2.148.0	10.2.148.0
2	10.2.148.1/32	10.2.148.1 – 10.2.148.1	10.2.148.1
3	10.2.148.2/32	10.2.148.2 – 10.2.148.2	10.2.148.2
4	10.2.148.3/32	10.2.148.3 – 10.2.148.3	10.2.148.3
5	10.2.148.4/32	10.2.148.4 – 10.2.148.4	10.2.148.4
6	10.2.148.5/32	10.2.148.5 – 10.2.148.5	10.2.148.5
7	10.2.148.6/32	10.2.148.6 – 10.2.148.6	10.2.148.6
8	10.2.148.7/32	10.2.148.7 – 10.2.148.7	10.2.148.7
9	10.2.148.8/32	10.2.148.8 – 10.2.148.8	10.2.148.8
10	10.2.148.9/32	10.2.148.9 – 10.2.148.9	10.2.148.9
11	10.2.148.10/32	10.2.148.10 – 10.2.148.10	10.2.148.10
12	10.2.148.11/32	10.2.148.11 – 10.2.148.11	10.2.148.11
13	10.2.148.12/32	10.2.148.12 – 10.2.148.12	10.2.148.12
14	10.2.148.13/32	10.2.148.13 – 10.2.148.13	10.2.148.13
15	10.2.148.14/32	10.2.148.14 – 10.2.148.14	10.2.148.14
16	10.2.148.15/32	10.2.148.15 – 10.2.148.15	10.2.148.15
17	10.2.148.16/32	10.2.148.16 – 10.2.148.16	10.2.148.16
18	10.2.148.17/32	10.2.148.17 – 10.2.148.17	10.2.148.17
19	10.2.148.18/32	10.2.148.18 – 10.2.148.18	10.2.148.18
20	10.2.148.19/32	10.2.148.19 – 10.2.148.19	10.2.148.19
21	10.2.148.20/32	10.2.148.20 – 10.2.148.20	10.2.148.20
22	10.2.148.21/32	10.2.148.21 – 10.2.148.21	10.2.148.21
23	10.2.148.22/32	10.2.148.22 – 10.2.148.22	10.2.148.22
24	10.2.148.23/32	10.2.148.23 – 10.2.148.23	10.2.148.23
25	10.2.148.24/32	10.2.148.24 – 10.2.148.24	10.2.148.24
26	10.2.148.25/32	10.2.148.25 – 10.2.148.25	10.2.148.25
27	10.2.148.26/32	10.2.148.26 – 10.2.148.26	10.2.148.26
28	10.2.148.27/32	10.2.148.27 – 10.2.148.27	10.2.148.27
29	10.2.148.28/32	10.2.148.28 – 10.2.148.28	10.2.148.28
30	10.2.148.29/32	10.2.148.29 – 10.2.148.29	10.2.148.29
31	10.2.148.30/32	10.2.148.30 – 10.2.148.30	10.2.148.30
32	10.2.148.31/32	10.2.148.31 – 10.2.148.31	10.2.148.31
33	10.2.148.32/32	10.2.148.32 – 10.2.148.32	10.2.148.32
34	10.2.148.33/32	10.2.148.33 – 10.2.148.33	10.2.148.33
35	10.2.148.34/32	10.2.148.34 – 10.2.148.34	10.2.148.34
36	10.2.148.35/32	10.2.148.35 – 10.2.148.35	10.2.148.35
37	10.2.148.36/32	10.2.148.36 – 10.2.148.36	10.2.148.36
38	10.2.148.37/32	10.2.148.37 – 10.2.148.37	10.2.148.37
39	10.2.148.38/32	10.2.148.38 – 10.2.148.38	10.2.148.38
40	10.2.148.39/32	10.2.148.39 – 10.2.148.39	10.2.148.39
41	10.2.148.40/32	10.2.148.40 – 10.2.148.40	10.2.148.40
42	10.2.148.41/32	10.2.148.41 – 10.2.148.41	10.2.148.41
43	10.2.148.42/32	10.2.148.42 – 10.2.148.42	10.2.148.42
44	10.2.148.43/32	10.2.148.43 – 10.2.148.43	10.2.148.43
45	10.2.148.44/32	10.2.148.44 – 10.2.148.44	10.2.148.44
46	10.2.148.45/32	10.2.148.45 – 10.2.148.45	10.2.148.45
47	10.2.148.46/32	10.2.148.46 – 10.2.148.46	10.2.148.46
48	10.2.148.47/32	10.2.148.47 – 10.2.148.47	10.2.148.47
49	10.2.148.48/32	10.2.148.48 – 10.2.148.48	10.2.148.48
50	10.2.148.49/32	10.2.148.49 – 10.2.148.49	10.2.148.49
51	10.2.148.50/32	10.2.148.50 – 10.2.148.50	10.2.148.50
52	10.2.148.51/32	10.2.148.51 – 10.2.148.51	10.2.148.51
53	10.2.148.52/32	10.2.148.52 – 10.2.148.52	10.2.148.52
54	10.2.148.53/32	10.2.148.53 – 10.2.148.53	10.2.148.53
55	10.2.148.54/32	10.2.148.54 – 10.2.148.54	10.2.148.54
56	10.2.148.55/32	10.2.148.55 – 10.2.148.55	10.2.148.55
57	10.2.148.56/32	10.2.148.56 – 10.2.148.56	10.2.148.56
58	10.2.148.57/32	10.2.148.57 – 10.2.148.57	10.2.148.57
59	10.2.148.58/32	10.2.148.58 – 10.2.148.58	10.2.148.58
60	10.2.148.59/32	10.2.148.59 – 10.2.148.59	10.2.148.59
61	10.2.148.60/32	10.2.148.60 – 10.2.148.60	10.2.148.60
62	10.2.148.61/32	10.2.148.61 – 10.2.148.61	10.2.148.61
63	10.2.148.62/32	10.2.148.62 – 10.2.148.62	10.2.148.62
64	10.2.148.63/32	10.2.148.63 – 10.2.148.63	10.2.148.63
65	10.2.148.64/32	10.2.148.64 – 10.2.148.64	10.2.148.64
66	10.2.148.65/32	10.2.148.65 – 10.2.148.65	10.2.148.65
67	10.2.148.66/32	10.2.148.66 – 10.2.148.66	10.2.148.66
68	10.2.148.67/32	10.2.148.67 – 10.2.148.67	10.2.148.67
69	10.2.148.68/32	10.2.148.68 – 10.2.148.68	10.2.148.68
70	10.2.148.69/32	10.2.148.69 – 10.2.148.69	10.2.148.69
71	10.2.148.70/32	10.2.148.70 – 10.2.148.70	10.2.148.70
72	10.2.148.71/32	10.2.148.71 – 10.2.148.71	10.2.148.71
73	10.2.148.72/32	10.2.148.72 – 10.2.148.72	10.2.148.72
74	10.2.148.73/32	10.2.148.73 – 10.2.148.73	10.2.148.73
75	10.2.148.74/32	10.2.148.74 – 10.2.148.74	10.2.148.74
76	10.2.148.75/32	10.2.148.75 – 10.2.148.75	10.2.148.75
77	10.2.148.76/32	10.2.148.76 – 10.2.148.76	10.2.148.76
78	10.2.148.77/32	10.2.148.77 – 10.2.148.77	10.2.148.77
79	10.2.148.78/32	10.2.148.78 – 10.2.148.78	10.2.148.78
80	10.2.148.79/32	10.2.148.79 – 10.2.148.79	10.2.148.79
81	10.2.148.80/32	10.2.148.80 – 10.2.148.80	10.2.148.80
82	10.2.148.81/32	10.2.148.81 – 10.2.148.81	10.2.148.81
83	10.2.148.82/32	10.2.148.82 – 10.2.148.82	10.2.148.82
84	10.2.148.83/32	10.2.148.83 – 10.2.148.83	10.2.148.83
85	10.2.148.84/32	10.2.148.84 – 10.2.148.84	10.2.148.84
86	10.2.148.85/32	10.2.148.85 – 10.2.148.85	10.2.148.85
87	10.2.148.86/32	10.2.148.86 – 10.2.148.86	10.2.148.86
88	10.2.148.87/32	10.2.148.87 – 10.2.148.87	10.2.148.87
89	10.2.148.88/32	10.2.148.88 – 10.2.148.88	10.2.148.88
90	10.2.148.89/32	10.2.148.89 – 10.2.148.89	10.2.148.89
91	10.2.148.90/32	10.2.148.90 – 10.2.148.90	10.2.148.90
92	10.2.148.91/32	10.2.148.91 – 10.2.148.91	10.2.148.91
93	10.2.148.92/32	10.2.148.92 – 10.2.148.92	10.2.148.92
94	10.2.148.93/32	10.2.148.93 – 10.2.148.93	10.2.148.93
95	10.2.148.94/32	10.2.148.94 – 10.2.148.94	10.2.148.94
96	10.2.148.95/32	10.2.148.95 – 10.2.148.95	10.2.148.95
97	10.2.148.96/32	10.2.148.96 – 10.2.148.96	10.2.148.96
98	10.2.148.97/32	10.2.148.97 – 10.2.148.97	10.2.148.97
99	10.2.148.98/32	10.2.148.98 – 10.2.148.98	10.2.148.98
100	10.2.148.99/32	10.2.148.99 – 10.2.148.99	10.2.148.99
101	10.2.148.100/32	10.2.148.100 – 10.2.148.100	10.2.148.100
102	10.2.148.101/32	10.2.148.101 – 10.2.148.101	10.2.148.101
103	10.2.148.102/32	10.2.148.102 – 10.2.148.102	10.2.148.102
104	10.2.148.103/32	10.2.148.103 – 10.2.148.103	10.2.148.103
105	10.2.148.104/32	10.2.148.104 – 10.2.148.104	10.2.148.104
106	10.2.148.105/32	10.2.148.105 – 10.2.148.105	10.2.148.105
107	10.2.148.106/32	10.2.148.106 – 10.2.148.106	10.2.148.106
108	10.2.148.107/32	10.2.148.107 – 10.2.148.107	10.2.148.107
109	10.2.148.108/32	10.2.148.108 – 10.2.148.108	10.2.148.108
110	10.2.148.109/32	10.2.148.109 – 10.2.148.109	10.2.148.109
111	10.2.148.110/32	10.2.148.110 – 10.2.148.110	10.2.148.110
112	10.2.148.111/32	10.2.148.111 – 10.2.148.111	10.2.148.111
113	10.2.148.112/32	10.2.148.112 – 10.2.148.112	10.2.148.112
114	10.2.148.113/32	10.2.148.113 – 10.2.148.113	10.2.148.113
115	10.2.148.114/32	10.2.148.114 – 10.2.148.114	10.2.148.114
116	10.2.148.115/32	10.2.148.115 – 10.2.148.115	10.2.148.115
117	10.2.148.116/32	10.2.148.116 – 10.2.148.116	10.2.148.116
118	10.2.148.117/32	10.2.148.117 – 10.2.148.117	10.2.148.117
119	10.2.148.118/32	10.2.148.118 – 10.2.148.118	10.2.148.118
120	10.2.148.119/32	10.2.148.119 – 10.2.148.119	10.2.148.119
121	10.2.148.120/32	10.2.148.120 – 10.2.148.120	10.2.148.120
122	10.2.148.121/32	10.2.148.121 – 10.2.148.121	10.2.148.121
123	10.2.148.122/32	10.2.148.122 – 10.2.148.122	10.2.148.122
124	10.2.148.123/32	10.2.148.123 – 10.2.148.123	10.2.148.123
125	10.2.148.124/32	10.2.148.124 – 10.2.148.124	10.2.148.124
126	10.2.148.125/32	10.2.148.125 – 10.2.148.125	10.2.148.125
127	10.2.148.126/32	10.2.148.126 – 10.2.148.126	10.2.148.126
128	10.2.148.127/32	10.2.148.127 – 10.2.148.127	10.2.148.127
129	10.2.148.128/32	10.2.148.128 – 10.2.148.128	10.2.148.128
130	10.2.148.129/32	10.2.148.129 – 10.2.148.129	10.2.148.129
131	10.2.148.130/32	10.2.148.130 – 10.2.148.130	10.2.148.130
132	10.2.148.131/32	10.2.148.131 – 10.2.148.131	10.2.148.131
133	10.2.148.132/32	10.2.148.132 – 10.2.148.132	10.2.148.132
134	10.2.148.133/32	10.2.148.133 – 10.2.148.133	10.2.148.133
135	10.2.148.134/32	10.2.148.134 – 10.2.148.134	10.2.148.134
136	10.2.148.135/32	10.2.148.135 – 10.2.148.135	10.2.148.135
137	10.2.148.136/32	10.2.148.136 – 10.2.148.136	10.2.148.136
138	10.2.148.137/32	10.2.148.137 – 10.2.148.137	10.2.148.137
139	10.2.148.138/32	10.2.148.138 – 10.2.148.138	10.2.148.138
140	10.2.148.139/32	10.2.148.139 – 10.2.148.139	10.2.148.139
141	10.2.148.140/32	10.2.148.140 – 10.2.148.140	10.2.148.140
142	10.2.148.141/32	10.2.148.141 – 10.2.148.141	10.2.148.141
143	10.2.148.142/32	10.2.148.142 – 10.2.148.142	10.2.148.142
144	10.2.148.143/32	10.2.148.143 – 10.2.148.143	10.2.148.143
145	10.2.148.144/32	10.2.148.144 – 10.2.148.144	10.2.148.144
146	10.2.148.145/32	10.2.148.145 – 10.2.148.145	10.2.148.145
147	10.2.148.146/32	10.2.148.146 – 10.2.148.146	10.2.148.146
148	10.2.148.147/32	10.2.148.147 – 10.2.148.147	10.2.148.147
149	10.2.148.148/32	10.2.148.148 – 10.2.148.148	10.2.148.148
150	10.2.148.149/32	10.2.148.149 – 10.2.148.149	10.2.148.149
151	10.2.148.150/32	10.2.148.150 – 10.2.148.150	10.2.148.150
152	10.2.148.151/32	10.2.148.151 – 10.2.148.151	10.2.148.151
153	10.2.148.152/32	10.2.148.152 – 10.2.148.152	10.2.148.152
154	10.2.148.153/32	10.2.148.153 – 10.2.148.153	10.2.148.153
155	10.2.148.154/32	10.2.148.154 – 10.2.148.154	10.2.148.154
156	10.2.148.155/32	10.2.148.155 – 10.2.148.155	10.2.148.155
157	10.2.148.156/32	10.2.148.156 – 10.2.148.156	10.2.148.156
158	10.2.148.157/32	10.2.148.157 – 10.2.148.157	10.2.148.157
159	10.2.148.158/32	10.2.148.158 – 10.2.148.158	10.2.148.158
160	10.2.148.159/32	10.2.148.159 – 10.2.148.159	10.2.148.159
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210	10.2.148.209/32	10.2.148.209 – 10.2.148.209	10.2.148.209
211	10.2.148.210/32	10.2.148.210 – 10.2.148.210	10.2.148.210
212	10.2.148.211/32	10.2.148.211 – 10.2.148.211	10.2.148.211
213	10.2.148.212/32	10.2.148.212 – 10.2.148.212	10.2.148.212
214	10.2.148.213/32	10.2.148.213 – 10.2.148.213	10.2.148.213
215	10.2.148.214/32	10.2.148.214 – 10.2.148.214	10.2.148.214
216	10.2.148.215/32	10.2.148.215 – 10.2.148.215	10.2.148.215
217	10.2.148.216/32	10.2.148.216 – 10.2.148.216	10.2.148.216
218	10.2.148.217/32	10.2.148.217 – 10.2.148.217	10.2.148.217
219	10.2.148.218/32	10.2.148.218 – 10.2.148.218	10.2.148.218
220	10.2.148.219/32	10.2.148.219 – 10.2.148.219	10.2.148.219
221	10.2.148.220/32	10.2.148.220 – 10.2.148.220	10.2.148.220
222	10.2.148.221/32	10.2.148.221 – 10.2.148.221	10.2.148.221
223	10.2.148.222/32	10.2.148.222 – 10.2.148.222	10.2.148.222
224	10.2.148.223/32	10.2.148.223 – 10.2.148.223	10.2.148.223
225	10.2.148.224/32	10.2.148.224 – 10.2.148.224	10.2.148.224
226	10.2.148.225/32	10.2.148.225 – 10.2.148.225	10.2.148.225
227	10.2.148.226/32	10.2.148.226 – 10.2.148.226	10.2.148.226
228	10.2.148.227/32	10.2.148.227 – 10.2.148.227	10.2.148.227
229	10.2.148.228/32	10.2.148.228 – 10.2.148.228	10.2.148.228
230	10.2.148.229/32	10.2.148.229 – 10.2.148.229	10.2.148.229
231	10.2.148.230/32	10.2.148.230 – 10.2.148.230	10.2.148.230
232	10.2.148.231/32	10.2.148.231 – 10.2.148.231	10.2.148.231
233	10.2.148.232/32	10.2.148.232 – 10.2.148.232	10.2.148.232
234	10.2.148.233/32	10.2.148.233 – 10.2.148.233	10.2.148.233
235	10.2.148.234/32	10.2.148.234 – 10.2.148.234	10.2.148.234
236	10.2.148.235/32	10.2.148.235 – 10.2.148.235	10.2.148.235
237	10.2.148.236/32	10.2.148.236 – 10.2.148.236	10.2.148.236
238	10.2.148.237/32	10.2.148.237 – 10.2.148.237	10.2.148.237
239	10.2.148.238/32	10.2.148.238 – 10.2.148.238	10.2.148.238
240	10.2.148.239/32	10.2.148.239 – 10.2.148.239	10.2.148.239
241	10.2.148.240/32	10.2.148.240 – 10.2.148.240	10.2.148.240
242	10.2.148.241/32	10.2.148.241 – 10.2.148.241	10.2.148.241
243	10.2.148.242/32	10.2.148.242 – 10.2.148.242	10.2.148.242
244	10.2.148.243/32	10.2.148.243 – 10.2.148.243	10.2.148.243
245	10.2.148.244/32	10.2.148.244 – 10.2.148.244	10.2.148.244
246	10.2.148.245/32	10.2.148.245 – 10.2.148.245	10.2.148.245
247	10.2.148.246/32	10.2.148.246 – 10.2.148.246	10.2.148.246
248	10.2.148.247/32	10.2.148.247 – 10.2.148.247	10.2.148.247
249	10.2.148.248/32	10.2.148.248 – 10.2.148.248	10.2.148.248
250	10.2.148.249/32	10.2.148.249 – 10.2.148.249	10.2.148.249
251	10.2.148.250/32	10.2.148.250 – 10.2.148.250	10.2.148.250
252	10.2.148.251/32	10.2.148.251 – 10.2.148.251	10.2.148.251
253	10.2.148.252/32	10.2.148.252 – 10.2.148.252	10.2.148.252
254	10.2.148.253/32	10.2.148.253 – 10.2.148.253	10.2.148.253
255	10.2.148.254/32	10.2.148.254 – 10.2.148.254	10.2.148.254
256	10.2.148.255/32	10.2.148.255 – 10.2.148.255	10.2.148.255

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 /24
/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	1
/25	255.255.255.128	128	126	2 split →
/26	255.255.255.192	64	62	4 split →
/27	255.255.255.224	32	30	8 split →
/28	255.255.255.240	16	14	16 split →
/29	255.255.255.248	8	6	32 split →
/30	255.255.255.252	4	2	64 split →
/31	255.255.255.254	2	2	128 split →
/32	255.255.255.255	1	1	256 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 →