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)10.2.217.0/24

network10.2.217.0/24

broadcast10.2.217.255

first host10.2.217.1

last host10.2.217.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.217.0/24

address00001010.00000010.11011001.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.11011001.00000000

broadcast00001010.00000010.11011001.11111111

green = network part, grey = host part

hex0x0a02d900

decimal167958784

reverse dns0.217.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:d900

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.217.0/32	10.2.217.0 – 10.2.217.0	10.2.217.0
2	10.2.217.1/32	10.2.217.1 – 10.2.217.1	10.2.217.1
3	10.2.217.2/32	10.2.217.2 – 10.2.217.2	10.2.217.2
4	10.2.217.3/32	10.2.217.3 – 10.2.217.3	10.2.217.3
5	10.2.217.4/32	10.2.217.4 – 10.2.217.4	10.2.217.4
6	10.2.217.5/32	10.2.217.5 – 10.2.217.5	10.2.217.5
7	10.2.217.6/32	10.2.217.6 – 10.2.217.6	10.2.217.6
8	10.2.217.7/32	10.2.217.7 – 10.2.217.7	10.2.217.7
9	10.2.217.8/32	10.2.217.8 – 10.2.217.8	10.2.217.8
10	10.2.217.9/32	10.2.217.9 – 10.2.217.9	10.2.217.9
11	10.2.217.10/32	10.2.217.10 – 10.2.217.10	10.2.217.10
12	10.2.217.11/32	10.2.217.11 – 10.2.217.11	10.2.217.11
13	10.2.217.12/32	10.2.217.12 – 10.2.217.12	10.2.217.12
14	10.2.217.13/32	10.2.217.13 – 10.2.217.13	10.2.217.13
15	10.2.217.14/32	10.2.217.14 – 10.2.217.14	10.2.217.14
16	10.2.217.15/32	10.2.217.15 – 10.2.217.15	10.2.217.15
17	10.2.217.16/32	10.2.217.16 – 10.2.217.16	10.2.217.16
18	10.2.217.17/32	10.2.217.17 – 10.2.217.17	10.2.217.17
19	10.2.217.18/32	10.2.217.18 – 10.2.217.18	10.2.217.18
20	10.2.217.19/32	10.2.217.19 – 10.2.217.19	10.2.217.19
21	10.2.217.20/32	10.2.217.20 – 10.2.217.20	10.2.217.20
22	10.2.217.21/32	10.2.217.21 – 10.2.217.21	10.2.217.21
23	10.2.217.22/32	10.2.217.22 – 10.2.217.22	10.2.217.22
24	10.2.217.23/32	10.2.217.23 – 10.2.217.23	10.2.217.23
25	10.2.217.24/32	10.2.217.24 – 10.2.217.24	10.2.217.24
26	10.2.217.25/32	10.2.217.25 – 10.2.217.25	10.2.217.25
27	10.2.217.26/32	10.2.217.26 – 10.2.217.26	10.2.217.26
28	10.2.217.27/32	10.2.217.27 – 10.2.217.27	10.2.217.27
29	10.2.217.28/32	10.2.217.28 – 10.2.217.28	10.2.217.28
30	10.2.217.29/32	10.2.217.29 – 10.2.217.29	10.2.217.29
31	10.2.217.30/32	10.2.217.30 – 10.2.217.30	10.2.217.30
32	10.2.217.31/32	10.2.217.31 – 10.2.217.31	10.2.217.31
33	10.2.217.32/32	10.2.217.32 – 10.2.217.32	10.2.217.32
34	10.2.217.33/32	10.2.217.33 – 10.2.217.33	10.2.217.33
35	10.2.217.34/32	10.2.217.34 – 10.2.217.34	10.2.217.34
36	10.2.217.35/32	10.2.217.35 – 10.2.217.35	10.2.217.35
37	10.2.217.36/32	10.2.217.36 – 10.2.217.36	10.2.217.36
38	10.2.217.37/32	10.2.217.37 – 10.2.217.37	10.2.217.37
39	10.2.217.38/32	10.2.217.38 – 10.2.217.38	10.2.217.38
40	10.2.217.39/32	10.2.217.39 – 10.2.217.39	10.2.217.39
41	10.2.217.40/32	10.2.217.40 – 10.2.217.40	10.2.217.40
42	10.2.217.41/32	10.2.217.41 – 10.2.217.41	10.2.217.41
43	10.2.217.42/32	10.2.217.42 – 10.2.217.42	10.2.217.42
44	10.2.217.43/32	10.2.217.43 – 10.2.217.43	10.2.217.43
45	10.2.217.44/32	10.2.217.44 – 10.2.217.44	10.2.217.44
46	10.2.217.45/32	10.2.217.45 – 10.2.217.45	10.2.217.45
47	10.2.217.46/32	10.2.217.46 – 10.2.217.46	10.2.217.46
48	10.2.217.47/32	10.2.217.47 – 10.2.217.47	10.2.217.47
49	10.2.217.48/32	10.2.217.48 – 10.2.217.48	10.2.217.48
50	10.2.217.49/32	10.2.217.49 – 10.2.217.49	10.2.217.49
51	10.2.217.50/32	10.2.217.50 – 10.2.217.50	10.2.217.50
52	10.2.217.51/32	10.2.217.51 – 10.2.217.51	10.2.217.51
53	10.2.217.52/32	10.2.217.52 – 10.2.217.52	10.2.217.52
54	10.2.217.53/32	10.2.217.53 – 10.2.217.53	10.2.217.53
55	10.2.217.54/32	10.2.217.54 – 10.2.217.54	10.2.217.54
56	10.2.217.55/32	10.2.217.55 – 10.2.217.55	10.2.217.55
57	10.2.217.56/32	10.2.217.56 – 10.2.217.56	10.2.217.56
58	10.2.217.57/32	10.2.217.57 – 10.2.217.57	10.2.217.57
59	10.2.217.58/32	10.2.217.58 – 10.2.217.58	10.2.217.58
60	10.2.217.59/32	10.2.217.59 – 10.2.217.59	10.2.217.59
61	10.2.217.60/32	10.2.217.60 – 10.2.217.60	10.2.217.60
62	10.2.217.61/32	10.2.217.61 – 10.2.217.61	10.2.217.61
63	10.2.217.62/32	10.2.217.62 – 10.2.217.62	10.2.217.62
64	10.2.217.63/32	10.2.217.63 – 10.2.217.63	10.2.217.63
65	10.2.217.64/32	10.2.217.64 – 10.2.217.64	10.2.217.64
66	10.2.217.65/32	10.2.217.65 – 10.2.217.65	10.2.217.65
67	10.2.217.66/32	10.2.217.66 – 10.2.217.66	10.2.217.66
68	10.2.217.67/32	10.2.217.67 – 10.2.217.67	10.2.217.67
69	10.2.217.68/32	10.2.217.68 – 10.2.217.68	10.2.217.68
70	10.2.217.69/32	10.2.217.69 – 10.2.217.69	10.2.217.69
71	10.2.217.70/32	10.2.217.70 – 10.2.217.70	10.2.217.70
72	10.2.217.71/32	10.2.217.71 – 10.2.217.71	10.2.217.71
73	10.2.217.72/32	10.2.217.72 – 10.2.217.72	10.2.217.72
74	10.2.217.73/32	10.2.217.73 – 10.2.217.73	10.2.217.73
75	10.2.217.74/32	10.2.217.74 – 10.2.217.74	10.2.217.74
76	10.2.217.75/32	10.2.217.75 – 10.2.217.75	10.2.217.75
77	10.2.217.76/32	10.2.217.76 – 10.2.217.76	10.2.217.76
78	10.2.217.77/32	10.2.217.77 – 10.2.217.77	10.2.217.77
79	10.2.217.78/32	10.2.217.78 – 10.2.217.78	10.2.217.78
80	10.2.217.79/32	10.2.217.79 – 10.2.217.79	10.2.217.79
81	10.2.217.80/32	10.2.217.80 – 10.2.217.80	10.2.217.80
82	10.2.217.81/32	10.2.217.81 – 10.2.217.81	10.2.217.81
83	10.2.217.82/32	10.2.217.82 – 10.2.217.82	10.2.217.82
84	10.2.217.83/32	10.2.217.83 – 10.2.217.83	10.2.217.83
85	10.2.217.84/32	10.2.217.84 – 10.2.217.84	10.2.217.84
86	10.2.217.85/32	10.2.217.85 – 10.2.217.85	10.2.217.85
87	10.2.217.86/32	10.2.217.86 – 10.2.217.86	10.2.217.86
88	10.2.217.87/32	10.2.217.87 – 10.2.217.87	10.2.217.87
89	10.2.217.88/32	10.2.217.88 – 10.2.217.88	10.2.217.88
90	10.2.217.89/32	10.2.217.89 – 10.2.217.89	10.2.217.89
91	10.2.217.90/32	10.2.217.90 – 10.2.217.90	10.2.217.90
92	10.2.217.91/32	10.2.217.91 – 10.2.217.91	10.2.217.91
93	10.2.217.92/32	10.2.217.92 – 10.2.217.92	10.2.217.92
94	10.2.217.93/32	10.2.217.93 – 10.2.217.93	10.2.217.93
95	10.2.217.94/32	10.2.217.94 – 10.2.217.94	10.2.217.94
96	10.2.217.95/32	10.2.217.95 – 10.2.217.95	10.2.217.95
97	10.2.217.96/32	10.2.217.96 – 10.2.217.96	10.2.217.96
98	10.2.217.97/32	10.2.217.97 – 10.2.217.97	10.2.217.97
99	10.2.217.98/32	10.2.217.98 – 10.2.217.98	10.2.217.98
100	10.2.217.99/32	10.2.217.99 – 10.2.217.99	10.2.217.99
101	10.2.217.100/32	10.2.217.100 – 10.2.217.100	10.2.217.100
102	10.2.217.101/32	10.2.217.101 – 10.2.217.101	10.2.217.101
103	10.2.217.102/32	10.2.217.102 – 10.2.217.102	10.2.217.102
104	10.2.217.103/32	10.2.217.103 – 10.2.217.103	10.2.217.103
105	10.2.217.104/32	10.2.217.104 – 10.2.217.104	10.2.217.104
106	10.2.217.105/32	10.2.217.105 – 10.2.217.105	10.2.217.105
107	10.2.217.106/32	10.2.217.106 – 10.2.217.106	10.2.217.106
108	10.2.217.107/32	10.2.217.107 – 10.2.217.107	10.2.217.107
109	10.2.217.108/32	10.2.217.108 – 10.2.217.108	10.2.217.108
110	10.2.217.109/32	10.2.217.109 – 10.2.217.109	10.2.217.109
111	10.2.217.110/32	10.2.217.110 – 10.2.217.110	10.2.217.110
112	10.2.217.111/32	10.2.217.111 – 10.2.217.111	10.2.217.111
113	10.2.217.112/32	10.2.217.112 – 10.2.217.112	10.2.217.112
114	10.2.217.113/32	10.2.217.113 – 10.2.217.113	10.2.217.113
115	10.2.217.114/32	10.2.217.114 – 10.2.217.114	10.2.217.114
116	10.2.217.115/32	10.2.217.115 – 10.2.217.115	10.2.217.115
117	10.2.217.116/32	10.2.217.116 – 10.2.217.116	10.2.217.116
118	10.2.217.117/32	10.2.217.117 – 10.2.217.117	10.2.217.117
119	10.2.217.118/32	10.2.217.118 – 10.2.217.118	10.2.217.118
120	10.2.217.119/32	10.2.217.119 – 10.2.217.119	10.2.217.119
121	10.2.217.120/32	10.2.217.120 – 10.2.217.120	10.2.217.120
122	10.2.217.121/32	10.2.217.121 – 10.2.217.121	10.2.217.121
123	10.2.217.122/32	10.2.217.122 – 10.2.217.122	10.2.217.122
124	10.2.217.123/32	10.2.217.123 – 10.2.217.123	10.2.217.123
125	10.2.217.124/32	10.2.217.124 – 10.2.217.124	10.2.217.124
126	10.2.217.125/32	10.2.217.125 – 10.2.217.125	10.2.217.125
127	10.2.217.126/32	10.2.217.126 – 10.2.217.126	10.2.217.126
128	10.2.217.127/32	10.2.217.127 – 10.2.217.127	10.2.217.127
129	10.2.217.128/32	10.2.217.128 – 10.2.217.128	10.2.217.128
130	10.2.217.129/32	10.2.217.129 – 10.2.217.129	10.2.217.129
131	10.2.217.130/32	10.2.217.130 – 10.2.217.130	10.2.217.130
132	10.2.217.131/32	10.2.217.131 – 10.2.217.131	10.2.217.131
133	10.2.217.132/32	10.2.217.132 – 10.2.217.132	10.2.217.132
134	10.2.217.133/32	10.2.217.133 – 10.2.217.133	10.2.217.133
135	10.2.217.134/32	10.2.217.134 – 10.2.217.134	10.2.217.134
136	10.2.217.135/32	10.2.217.135 – 10.2.217.135	10.2.217.135
137	10.2.217.136/32	10.2.217.136 – 10.2.217.136	10.2.217.136
138	10.2.217.137/32	10.2.217.137 – 10.2.217.137	10.2.217.137
139	10.2.217.138/32	10.2.217.138 – 10.2.217.138	10.2.217.138
140	10.2.217.139/32	10.2.217.139 – 10.2.217.139	10.2.217.139
141	10.2.217.140/32	10.2.217.140 – 10.2.217.140	10.2.217.140
142	10.2.217.141/32	10.2.217.141 – 10.2.217.141	10.2.217.141
143	10.2.217.142/32	10.2.217.142 – 10.2.217.142	10.2.217.142
144	10.2.217.143/32	10.2.217.143 – 10.2.217.143	10.2.217.143
145	10.2.217.144/32	10.2.217.144 – 10.2.217.144	10.2.217.144
146	10.2.217.145/32	10.2.217.145 – 10.2.217.145	10.2.217.145
147	10.2.217.146/32	10.2.217.146 – 10.2.217.146	10.2.217.146
148	10.2.217.147/32	10.2.217.147 – 10.2.217.147	10.2.217.147
149	10.2.217.148/32	10.2.217.148 – 10.2.217.148	10.2.217.148
150	10.2.217.149/32	10.2.217.149 – 10.2.217.149	10.2.217.149
151	10.2.217.150/32	10.2.217.150 – 10.2.217.150	10.2.217.150
152	10.2.217.151/32	10.2.217.151 – 10.2.217.151	10.2.217.151
153	10.2.217.152/32	10.2.217.152 – 10.2.217.152	10.2.217.152
154	10.2.217.153/32	10.2.217.153 – 10.2.217.153	10.2.217.153
155	10.2.217.154/32	10.2.217.154 – 10.2.217.154	10.2.217.154
156	10.2.217.155/32	10.2.217.155 – 10.2.217.155	10.2.217.155
157	10.2.217.156/32	10.2.217.156 – 10.2.217.156	10.2.217.156
158	10.2.217.157/32	10.2.217.157 – 10.2.217.157	10.2.217.157
159	10.2.217.158/32	10.2.217.158 – 10.2.217.158	10.2.217.158
160	10.2.217.159/32	10.2.217.159 – 10.2.217.159	10.2.217.159
161	10.2.217.160/32	10.2.217.160 – 10.2.217.160	10.2.217.160
162	10.2.217.161/32	10.2.217.161 – 10.2.217.161	10.2.217.161
163	10.2.217.162/32	10.2.217.162 – 10.2.217.162	10.2.217.162
164	10.2.217.163/32	10.2.217.163 – 10.2.217.163	10.2.217.163
165	10.2.217.164/32	10.2.217.164 – 10.2.217.164	10.2.217.164
166	10.2.217.165/32	10.2.217.165 – 10.2.217.165	10.2.217.165
167	10.2.217.166/32	10.2.217.166 – 10.2.217.166	10.2.217.166
168	10.2.217.167/32	10.2.217.167 – 10.2.217.167	10.2.217.167
169	10.2.217.168/32	10.2.217.168 – 10.2.217.168	10.2.217.168
170	10.2.217.169/32	10.2.217.169 – 10.2.217.169	10.2.217.169
171	10.2.217.170/32	10.2.217.170 – 10.2.217.170	10.2.217.170
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210	10.2.217.209/32	10.2.217.209 – 10.2.217.209	10.2.217.209
211	10.2.217.210/32	10.2.217.210 – 10.2.217.210	10.2.217.210
212	10.2.217.211/32	10.2.217.211 – 10.2.217.211	10.2.217.211
213	10.2.217.212/32	10.2.217.212 – 10.2.217.212	10.2.217.212
214	10.2.217.213/32	10.2.217.213 – 10.2.217.213	10.2.217.213
215	10.2.217.214/32	10.2.217.214 – 10.2.217.214	10.2.217.214
216	10.2.217.215/32	10.2.217.215 – 10.2.217.215	10.2.217.215
217	10.2.217.216/32	10.2.217.216 – 10.2.217.216	10.2.217.216
218	10.2.217.217/32	10.2.217.217 – 10.2.217.217	10.2.217.217
219	10.2.217.218/32	10.2.217.218 – 10.2.217.218	10.2.217.218
220	10.2.217.219/32	10.2.217.219 – 10.2.217.219	10.2.217.219
221	10.2.217.220/32	10.2.217.220 – 10.2.217.220	10.2.217.220
222	10.2.217.221/32	10.2.217.221 – 10.2.217.221	10.2.217.221
223	10.2.217.222/32	10.2.217.222 – 10.2.217.222	10.2.217.222
224	10.2.217.223/32	10.2.217.223 – 10.2.217.223	10.2.217.223
225	10.2.217.224/32	10.2.217.224 – 10.2.217.224	10.2.217.224
226	10.2.217.225/32	10.2.217.225 – 10.2.217.225	10.2.217.225
227	10.2.217.226/32	10.2.217.226 – 10.2.217.226	10.2.217.226
228	10.2.217.227/32	10.2.217.227 – 10.2.217.227	10.2.217.227
229	10.2.217.228/32	10.2.217.228 – 10.2.217.228	10.2.217.228
230	10.2.217.229/32	10.2.217.229 – 10.2.217.229	10.2.217.229
231	10.2.217.230/32	10.2.217.230 – 10.2.217.230	10.2.217.230
232	10.2.217.231/32	10.2.217.231 – 10.2.217.231	10.2.217.231
233	10.2.217.232/32	10.2.217.232 – 10.2.217.232	10.2.217.232
234	10.2.217.233/32	10.2.217.233 – 10.2.217.233	10.2.217.233
235	10.2.217.234/32	10.2.217.234 – 10.2.217.234	10.2.217.234
236	10.2.217.235/32	10.2.217.235 – 10.2.217.235	10.2.217.235
237	10.2.217.236/32	10.2.217.236 – 10.2.217.236	10.2.217.236
238	10.2.217.237/32	10.2.217.237 – 10.2.217.237	10.2.217.237
239	10.2.217.238/32	10.2.217.238 – 10.2.217.238	10.2.217.238
240	10.2.217.239/32	10.2.217.239 – 10.2.217.239	10.2.217.239
241	10.2.217.240/32	10.2.217.240 – 10.2.217.240	10.2.217.240
242	10.2.217.241/32	10.2.217.241 – 10.2.217.241	10.2.217.241
243	10.2.217.242/32	10.2.217.242 – 10.2.217.242	10.2.217.242
244	10.2.217.243/32	10.2.217.243 – 10.2.217.243	10.2.217.243
245	10.2.217.244/32	10.2.217.244 – 10.2.217.244	10.2.217.244
246	10.2.217.245/32	10.2.217.245 – 10.2.217.245	10.2.217.245
247	10.2.217.246/32	10.2.217.246 – 10.2.217.246	10.2.217.246
248	10.2.217.247/32	10.2.217.247 – 10.2.217.247	10.2.217.247
249	10.2.217.248/32	10.2.217.248 – 10.2.217.248	10.2.217.248
250	10.2.217.249/32	10.2.217.249 – 10.2.217.249	10.2.217.249
251	10.2.217.250/32	10.2.217.250 – 10.2.217.250	10.2.217.250
252	10.2.217.251/32	10.2.217.251 – 10.2.217.251	10.2.217.251
253	10.2.217.252/32	10.2.217.252 – 10.2.217.252	10.2.217.252
254	10.2.217.253/32	10.2.217.253 – 10.2.217.253	10.2.217.253
255	10.2.217.254/32	10.2.217.254 – 10.2.217.254	10.2.217.254
256	10.2.217.255/32	10.2.217.255 – 10.2.217.255	10.2.217.255

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 →