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)10.2.225.0/24

network10.2.225.0/24

broadcast10.2.225.255

first host10.2.225.1

last host10.2.225.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.225.0/24

address00001010.00000010.11100001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.11100001.00000000

broadcast00001010.00000010.11100001.11111111

green = network part, grey = host part

hex0x0a02e100

decimal167960832

reverse dns0.225.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:e100

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.225.0/32	10.2.225.0 – 10.2.225.0	10.2.225.0
2	10.2.225.1/32	10.2.225.1 – 10.2.225.1	10.2.225.1
3	10.2.225.2/32	10.2.225.2 – 10.2.225.2	10.2.225.2
4	10.2.225.3/32	10.2.225.3 – 10.2.225.3	10.2.225.3
5	10.2.225.4/32	10.2.225.4 – 10.2.225.4	10.2.225.4
6	10.2.225.5/32	10.2.225.5 – 10.2.225.5	10.2.225.5
7	10.2.225.6/32	10.2.225.6 – 10.2.225.6	10.2.225.6
8	10.2.225.7/32	10.2.225.7 – 10.2.225.7	10.2.225.7
9	10.2.225.8/32	10.2.225.8 – 10.2.225.8	10.2.225.8
10	10.2.225.9/32	10.2.225.9 – 10.2.225.9	10.2.225.9
11	10.2.225.10/32	10.2.225.10 – 10.2.225.10	10.2.225.10
12	10.2.225.11/32	10.2.225.11 – 10.2.225.11	10.2.225.11
13	10.2.225.12/32	10.2.225.12 – 10.2.225.12	10.2.225.12
14	10.2.225.13/32	10.2.225.13 – 10.2.225.13	10.2.225.13
15	10.2.225.14/32	10.2.225.14 – 10.2.225.14	10.2.225.14
16	10.2.225.15/32	10.2.225.15 – 10.2.225.15	10.2.225.15
17	10.2.225.16/32	10.2.225.16 – 10.2.225.16	10.2.225.16
18	10.2.225.17/32	10.2.225.17 – 10.2.225.17	10.2.225.17
19	10.2.225.18/32	10.2.225.18 – 10.2.225.18	10.2.225.18
20	10.2.225.19/32	10.2.225.19 – 10.2.225.19	10.2.225.19
21	10.2.225.20/32	10.2.225.20 – 10.2.225.20	10.2.225.20
22	10.2.225.21/32	10.2.225.21 – 10.2.225.21	10.2.225.21
23	10.2.225.22/32	10.2.225.22 – 10.2.225.22	10.2.225.22
24	10.2.225.23/32	10.2.225.23 – 10.2.225.23	10.2.225.23
25	10.2.225.24/32	10.2.225.24 – 10.2.225.24	10.2.225.24
26	10.2.225.25/32	10.2.225.25 – 10.2.225.25	10.2.225.25
27	10.2.225.26/32	10.2.225.26 – 10.2.225.26	10.2.225.26
28	10.2.225.27/32	10.2.225.27 – 10.2.225.27	10.2.225.27
29	10.2.225.28/32	10.2.225.28 – 10.2.225.28	10.2.225.28
30	10.2.225.29/32	10.2.225.29 – 10.2.225.29	10.2.225.29
31	10.2.225.30/32	10.2.225.30 – 10.2.225.30	10.2.225.30
32	10.2.225.31/32	10.2.225.31 – 10.2.225.31	10.2.225.31
33	10.2.225.32/32	10.2.225.32 – 10.2.225.32	10.2.225.32
34	10.2.225.33/32	10.2.225.33 – 10.2.225.33	10.2.225.33
35	10.2.225.34/32	10.2.225.34 – 10.2.225.34	10.2.225.34
36	10.2.225.35/32	10.2.225.35 – 10.2.225.35	10.2.225.35
37	10.2.225.36/32	10.2.225.36 – 10.2.225.36	10.2.225.36
38	10.2.225.37/32	10.2.225.37 – 10.2.225.37	10.2.225.37
39	10.2.225.38/32	10.2.225.38 – 10.2.225.38	10.2.225.38
40	10.2.225.39/32	10.2.225.39 – 10.2.225.39	10.2.225.39
41	10.2.225.40/32	10.2.225.40 – 10.2.225.40	10.2.225.40
42	10.2.225.41/32	10.2.225.41 – 10.2.225.41	10.2.225.41
43	10.2.225.42/32	10.2.225.42 – 10.2.225.42	10.2.225.42
44	10.2.225.43/32	10.2.225.43 – 10.2.225.43	10.2.225.43
45	10.2.225.44/32	10.2.225.44 – 10.2.225.44	10.2.225.44
46	10.2.225.45/32	10.2.225.45 – 10.2.225.45	10.2.225.45
47	10.2.225.46/32	10.2.225.46 – 10.2.225.46	10.2.225.46
48	10.2.225.47/32	10.2.225.47 – 10.2.225.47	10.2.225.47
49	10.2.225.48/32	10.2.225.48 – 10.2.225.48	10.2.225.48
50	10.2.225.49/32	10.2.225.49 – 10.2.225.49	10.2.225.49
51	10.2.225.50/32	10.2.225.50 – 10.2.225.50	10.2.225.50
52	10.2.225.51/32	10.2.225.51 – 10.2.225.51	10.2.225.51
53	10.2.225.52/32	10.2.225.52 – 10.2.225.52	10.2.225.52
54	10.2.225.53/32	10.2.225.53 – 10.2.225.53	10.2.225.53
55	10.2.225.54/32	10.2.225.54 – 10.2.225.54	10.2.225.54
56	10.2.225.55/32	10.2.225.55 – 10.2.225.55	10.2.225.55
57	10.2.225.56/32	10.2.225.56 – 10.2.225.56	10.2.225.56
58	10.2.225.57/32	10.2.225.57 – 10.2.225.57	10.2.225.57
59	10.2.225.58/32	10.2.225.58 – 10.2.225.58	10.2.225.58
60	10.2.225.59/32	10.2.225.59 – 10.2.225.59	10.2.225.59
61	10.2.225.60/32	10.2.225.60 – 10.2.225.60	10.2.225.60
62	10.2.225.61/32	10.2.225.61 – 10.2.225.61	10.2.225.61
63	10.2.225.62/32	10.2.225.62 – 10.2.225.62	10.2.225.62
64	10.2.225.63/32	10.2.225.63 – 10.2.225.63	10.2.225.63
65	10.2.225.64/32	10.2.225.64 – 10.2.225.64	10.2.225.64
66	10.2.225.65/32	10.2.225.65 – 10.2.225.65	10.2.225.65
67	10.2.225.66/32	10.2.225.66 – 10.2.225.66	10.2.225.66
68	10.2.225.67/32	10.2.225.67 – 10.2.225.67	10.2.225.67
69	10.2.225.68/32	10.2.225.68 – 10.2.225.68	10.2.225.68
70	10.2.225.69/32	10.2.225.69 – 10.2.225.69	10.2.225.69
71	10.2.225.70/32	10.2.225.70 – 10.2.225.70	10.2.225.70
72	10.2.225.71/32	10.2.225.71 – 10.2.225.71	10.2.225.71
73	10.2.225.72/32	10.2.225.72 – 10.2.225.72	10.2.225.72
74	10.2.225.73/32	10.2.225.73 – 10.2.225.73	10.2.225.73
75	10.2.225.74/32	10.2.225.74 – 10.2.225.74	10.2.225.74
76	10.2.225.75/32	10.2.225.75 – 10.2.225.75	10.2.225.75
77	10.2.225.76/32	10.2.225.76 – 10.2.225.76	10.2.225.76
78	10.2.225.77/32	10.2.225.77 – 10.2.225.77	10.2.225.77
79	10.2.225.78/32	10.2.225.78 – 10.2.225.78	10.2.225.78
80	10.2.225.79/32	10.2.225.79 – 10.2.225.79	10.2.225.79
81	10.2.225.80/32	10.2.225.80 – 10.2.225.80	10.2.225.80
82	10.2.225.81/32	10.2.225.81 – 10.2.225.81	10.2.225.81
83	10.2.225.82/32	10.2.225.82 – 10.2.225.82	10.2.225.82
84	10.2.225.83/32	10.2.225.83 – 10.2.225.83	10.2.225.83
85	10.2.225.84/32	10.2.225.84 – 10.2.225.84	10.2.225.84
86	10.2.225.85/32	10.2.225.85 – 10.2.225.85	10.2.225.85
87	10.2.225.86/32	10.2.225.86 – 10.2.225.86	10.2.225.86
88	10.2.225.87/32	10.2.225.87 – 10.2.225.87	10.2.225.87
89	10.2.225.88/32	10.2.225.88 – 10.2.225.88	10.2.225.88
90	10.2.225.89/32	10.2.225.89 – 10.2.225.89	10.2.225.89
91	10.2.225.90/32	10.2.225.90 – 10.2.225.90	10.2.225.90
92	10.2.225.91/32	10.2.225.91 – 10.2.225.91	10.2.225.91
93	10.2.225.92/32	10.2.225.92 – 10.2.225.92	10.2.225.92
94	10.2.225.93/32	10.2.225.93 – 10.2.225.93	10.2.225.93
95	10.2.225.94/32	10.2.225.94 – 10.2.225.94	10.2.225.94
96	10.2.225.95/32	10.2.225.95 – 10.2.225.95	10.2.225.95
97	10.2.225.96/32	10.2.225.96 – 10.2.225.96	10.2.225.96
98	10.2.225.97/32	10.2.225.97 – 10.2.225.97	10.2.225.97
99	10.2.225.98/32	10.2.225.98 – 10.2.225.98	10.2.225.98
100	10.2.225.99/32	10.2.225.99 – 10.2.225.99	10.2.225.99
101	10.2.225.100/32	10.2.225.100 – 10.2.225.100	10.2.225.100
102	10.2.225.101/32	10.2.225.101 – 10.2.225.101	10.2.225.101
103	10.2.225.102/32	10.2.225.102 – 10.2.225.102	10.2.225.102
104	10.2.225.103/32	10.2.225.103 – 10.2.225.103	10.2.225.103
105	10.2.225.104/32	10.2.225.104 – 10.2.225.104	10.2.225.104
106	10.2.225.105/32	10.2.225.105 – 10.2.225.105	10.2.225.105
107	10.2.225.106/32	10.2.225.106 – 10.2.225.106	10.2.225.106
108	10.2.225.107/32	10.2.225.107 – 10.2.225.107	10.2.225.107
109	10.2.225.108/32	10.2.225.108 – 10.2.225.108	10.2.225.108
110	10.2.225.109/32	10.2.225.109 – 10.2.225.109	10.2.225.109
111	10.2.225.110/32	10.2.225.110 – 10.2.225.110	10.2.225.110
112	10.2.225.111/32	10.2.225.111 – 10.2.225.111	10.2.225.111
113	10.2.225.112/32	10.2.225.112 – 10.2.225.112	10.2.225.112
114	10.2.225.113/32	10.2.225.113 – 10.2.225.113	10.2.225.113
115	10.2.225.114/32	10.2.225.114 – 10.2.225.114	10.2.225.114
116	10.2.225.115/32	10.2.225.115 – 10.2.225.115	10.2.225.115
117	10.2.225.116/32	10.2.225.116 – 10.2.225.116	10.2.225.116
118	10.2.225.117/32	10.2.225.117 – 10.2.225.117	10.2.225.117
119	10.2.225.118/32	10.2.225.118 – 10.2.225.118	10.2.225.118
120	10.2.225.119/32	10.2.225.119 – 10.2.225.119	10.2.225.119
121	10.2.225.120/32	10.2.225.120 – 10.2.225.120	10.2.225.120
122	10.2.225.121/32	10.2.225.121 – 10.2.225.121	10.2.225.121
123	10.2.225.122/32	10.2.225.122 – 10.2.225.122	10.2.225.122
124	10.2.225.123/32	10.2.225.123 – 10.2.225.123	10.2.225.123
125	10.2.225.124/32	10.2.225.124 – 10.2.225.124	10.2.225.124
126	10.2.225.125/32	10.2.225.125 – 10.2.225.125	10.2.225.125
127	10.2.225.126/32	10.2.225.126 – 10.2.225.126	10.2.225.126
128	10.2.225.127/32	10.2.225.127 – 10.2.225.127	10.2.225.127
129	10.2.225.128/32	10.2.225.128 – 10.2.225.128	10.2.225.128
130	10.2.225.129/32	10.2.225.129 – 10.2.225.129	10.2.225.129
131	10.2.225.130/32	10.2.225.130 – 10.2.225.130	10.2.225.130
132	10.2.225.131/32	10.2.225.131 – 10.2.225.131	10.2.225.131
133	10.2.225.132/32	10.2.225.132 – 10.2.225.132	10.2.225.132
134	10.2.225.133/32	10.2.225.133 – 10.2.225.133	10.2.225.133
135	10.2.225.134/32	10.2.225.134 – 10.2.225.134	10.2.225.134
136	10.2.225.135/32	10.2.225.135 – 10.2.225.135	10.2.225.135
137	10.2.225.136/32	10.2.225.136 – 10.2.225.136	10.2.225.136
138	10.2.225.137/32	10.2.225.137 – 10.2.225.137	10.2.225.137
139	10.2.225.138/32	10.2.225.138 – 10.2.225.138	10.2.225.138
140	10.2.225.139/32	10.2.225.139 – 10.2.225.139	10.2.225.139
141	10.2.225.140/32	10.2.225.140 – 10.2.225.140	10.2.225.140
142	10.2.225.141/32	10.2.225.141 – 10.2.225.141	10.2.225.141
143	10.2.225.142/32	10.2.225.142 – 10.2.225.142	10.2.225.142
144	10.2.225.143/32	10.2.225.143 – 10.2.225.143	10.2.225.143
145	10.2.225.144/32	10.2.225.144 – 10.2.225.144	10.2.225.144
146	10.2.225.145/32	10.2.225.145 – 10.2.225.145	10.2.225.145
147	10.2.225.146/32	10.2.225.146 – 10.2.225.146	10.2.225.146
148	10.2.225.147/32	10.2.225.147 – 10.2.225.147	10.2.225.147
149	10.2.225.148/32	10.2.225.148 – 10.2.225.148	10.2.225.148
150	10.2.225.149/32	10.2.225.149 – 10.2.225.149	10.2.225.149
151	10.2.225.150/32	10.2.225.150 – 10.2.225.150	10.2.225.150
152	10.2.225.151/32	10.2.225.151 – 10.2.225.151	10.2.225.151
153	10.2.225.152/32	10.2.225.152 – 10.2.225.152	10.2.225.152
154	10.2.225.153/32	10.2.225.153 – 10.2.225.153	10.2.225.153
155	10.2.225.154/32	10.2.225.154 – 10.2.225.154	10.2.225.154
156	10.2.225.155/32	10.2.225.155 – 10.2.225.155	10.2.225.155
157	10.2.225.156/32	10.2.225.156 – 10.2.225.156	10.2.225.156
158	10.2.225.157/32	10.2.225.157 – 10.2.225.157	10.2.225.157
159	10.2.225.158/32	10.2.225.158 – 10.2.225.158	10.2.225.158
160	10.2.225.159/32	10.2.225.159 – 10.2.225.159	10.2.225.159
161	10.2.225.160/32	10.2.225.160 – 10.2.225.160	10.2.225.160
162	10.2.225.161/32	10.2.225.161 – 10.2.225.161	10.2.225.161
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210	10.2.225.209/32	10.2.225.209 – 10.2.225.209	10.2.225.209
211	10.2.225.210/32	10.2.225.210 – 10.2.225.210	10.2.225.210
212	10.2.225.211/32	10.2.225.211 – 10.2.225.211	10.2.225.211
213	10.2.225.212/32	10.2.225.212 – 10.2.225.212	10.2.225.212
214	10.2.225.213/32	10.2.225.213 – 10.2.225.213	10.2.225.213
215	10.2.225.214/32	10.2.225.214 – 10.2.225.214	10.2.225.214
216	10.2.225.215/32	10.2.225.215 – 10.2.225.215	10.2.225.215
217	10.2.225.216/32	10.2.225.216 – 10.2.225.216	10.2.225.216
218	10.2.225.217/32	10.2.225.217 – 10.2.225.217	10.2.225.217
219	10.2.225.218/32	10.2.225.218 – 10.2.225.218	10.2.225.218
220	10.2.225.219/32	10.2.225.219 – 10.2.225.219	10.2.225.219
221	10.2.225.220/32	10.2.225.220 – 10.2.225.220	10.2.225.220
222	10.2.225.221/32	10.2.225.221 – 10.2.225.221	10.2.225.221
223	10.2.225.222/32	10.2.225.222 – 10.2.225.222	10.2.225.222
224	10.2.225.223/32	10.2.225.223 – 10.2.225.223	10.2.225.223
225	10.2.225.224/32	10.2.225.224 – 10.2.225.224	10.2.225.224
226	10.2.225.225/32	10.2.225.225 – 10.2.225.225	10.2.225.225
227	10.2.225.226/32	10.2.225.226 – 10.2.225.226	10.2.225.226
228	10.2.225.227/32	10.2.225.227 – 10.2.225.227	10.2.225.227
229	10.2.225.228/32	10.2.225.228 – 10.2.225.228	10.2.225.228
230	10.2.225.229/32	10.2.225.229 – 10.2.225.229	10.2.225.229
231	10.2.225.230/32	10.2.225.230 – 10.2.225.230	10.2.225.230
232	10.2.225.231/32	10.2.225.231 – 10.2.225.231	10.2.225.231
233	10.2.225.232/32	10.2.225.232 – 10.2.225.232	10.2.225.232
234	10.2.225.233/32	10.2.225.233 – 10.2.225.233	10.2.225.233
235	10.2.225.234/32	10.2.225.234 – 10.2.225.234	10.2.225.234
236	10.2.225.235/32	10.2.225.235 – 10.2.225.235	10.2.225.235
237	10.2.225.236/32	10.2.225.236 – 10.2.225.236	10.2.225.236
238	10.2.225.237/32	10.2.225.237 – 10.2.225.237	10.2.225.237
239	10.2.225.238/32	10.2.225.238 – 10.2.225.238	10.2.225.238
240	10.2.225.239/32	10.2.225.239 – 10.2.225.239	10.2.225.239
241	10.2.225.240/32	10.2.225.240 – 10.2.225.240	10.2.225.240
242	10.2.225.241/32	10.2.225.241 – 10.2.225.241	10.2.225.241
243	10.2.225.242/32	10.2.225.242 – 10.2.225.242	10.2.225.242
244	10.2.225.243/32	10.2.225.243 – 10.2.225.243	10.2.225.243
245	10.2.225.244/32	10.2.225.244 – 10.2.225.244	10.2.225.244
246	10.2.225.245/32	10.2.225.245 – 10.2.225.245	10.2.225.245
247	10.2.225.246/32	10.2.225.246 – 10.2.225.246	10.2.225.246
248	10.2.225.247/32	10.2.225.247 – 10.2.225.247	10.2.225.247
249	10.2.225.248/32	10.2.225.248 – 10.2.225.248	10.2.225.248
250	10.2.225.249/32	10.2.225.249 – 10.2.225.249	10.2.225.249
251	10.2.225.250/32	10.2.225.250 – 10.2.225.250	10.2.225.250
252	10.2.225.251/32	10.2.225.251 – 10.2.225.251	10.2.225.251
253	10.2.225.252/32	10.2.225.252 – 10.2.225.252	10.2.225.252
254	10.2.225.253/32	10.2.225.253 – 10.2.225.253	10.2.225.253
255	10.2.225.254/32	10.2.225.254 – 10.2.225.254	10.2.225.254
256	10.2.225.255/32	10.2.225.255 – 10.2.225.255	10.2.225.255

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 →