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)10.2.122.0/24

network10.2.122.0/24

broadcast10.2.122.255

first host10.2.122.1

last host10.2.122.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.122.0/24

address00001010.00000010.01111010.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.01111010.00000000

broadcast00001010.00000010.01111010.11111111

green = network part, grey = host part

hex0x0a027a00

decimal167934464

reverse dns0.122.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:7a00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.122.0/32	10.2.122.0 – 10.2.122.0	10.2.122.0
2	10.2.122.1/32	10.2.122.1 – 10.2.122.1	10.2.122.1
3	10.2.122.2/32	10.2.122.2 – 10.2.122.2	10.2.122.2
4	10.2.122.3/32	10.2.122.3 – 10.2.122.3	10.2.122.3
5	10.2.122.4/32	10.2.122.4 – 10.2.122.4	10.2.122.4
6	10.2.122.5/32	10.2.122.5 – 10.2.122.5	10.2.122.5
7	10.2.122.6/32	10.2.122.6 – 10.2.122.6	10.2.122.6
8	10.2.122.7/32	10.2.122.7 – 10.2.122.7	10.2.122.7
9	10.2.122.8/32	10.2.122.8 – 10.2.122.8	10.2.122.8
10	10.2.122.9/32	10.2.122.9 – 10.2.122.9	10.2.122.9
11	10.2.122.10/32	10.2.122.10 – 10.2.122.10	10.2.122.10
12	10.2.122.11/32	10.2.122.11 – 10.2.122.11	10.2.122.11
13	10.2.122.12/32	10.2.122.12 – 10.2.122.12	10.2.122.12
14	10.2.122.13/32	10.2.122.13 – 10.2.122.13	10.2.122.13
15	10.2.122.14/32	10.2.122.14 – 10.2.122.14	10.2.122.14
16	10.2.122.15/32	10.2.122.15 – 10.2.122.15	10.2.122.15
17	10.2.122.16/32	10.2.122.16 – 10.2.122.16	10.2.122.16
18	10.2.122.17/32	10.2.122.17 – 10.2.122.17	10.2.122.17
19	10.2.122.18/32	10.2.122.18 – 10.2.122.18	10.2.122.18
20	10.2.122.19/32	10.2.122.19 – 10.2.122.19	10.2.122.19
21	10.2.122.20/32	10.2.122.20 – 10.2.122.20	10.2.122.20
22	10.2.122.21/32	10.2.122.21 – 10.2.122.21	10.2.122.21
23	10.2.122.22/32	10.2.122.22 – 10.2.122.22	10.2.122.22
24	10.2.122.23/32	10.2.122.23 – 10.2.122.23	10.2.122.23
25	10.2.122.24/32	10.2.122.24 – 10.2.122.24	10.2.122.24
26	10.2.122.25/32	10.2.122.25 – 10.2.122.25	10.2.122.25
27	10.2.122.26/32	10.2.122.26 – 10.2.122.26	10.2.122.26
28	10.2.122.27/32	10.2.122.27 – 10.2.122.27	10.2.122.27
29	10.2.122.28/32	10.2.122.28 – 10.2.122.28	10.2.122.28
30	10.2.122.29/32	10.2.122.29 – 10.2.122.29	10.2.122.29
31	10.2.122.30/32	10.2.122.30 – 10.2.122.30	10.2.122.30
32	10.2.122.31/32	10.2.122.31 – 10.2.122.31	10.2.122.31
33	10.2.122.32/32	10.2.122.32 – 10.2.122.32	10.2.122.32
34	10.2.122.33/32	10.2.122.33 – 10.2.122.33	10.2.122.33
35	10.2.122.34/32	10.2.122.34 – 10.2.122.34	10.2.122.34
36	10.2.122.35/32	10.2.122.35 – 10.2.122.35	10.2.122.35
37	10.2.122.36/32	10.2.122.36 – 10.2.122.36	10.2.122.36
38	10.2.122.37/32	10.2.122.37 – 10.2.122.37	10.2.122.37
39	10.2.122.38/32	10.2.122.38 – 10.2.122.38	10.2.122.38
40	10.2.122.39/32	10.2.122.39 – 10.2.122.39	10.2.122.39
41	10.2.122.40/32	10.2.122.40 – 10.2.122.40	10.2.122.40
42	10.2.122.41/32	10.2.122.41 – 10.2.122.41	10.2.122.41
43	10.2.122.42/32	10.2.122.42 – 10.2.122.42	10.2.122.42
44	10.2.122.43/32	10.2.122.43 – 10.2.122.43	10.2.122.43
45	10.2.122.44/32	10.2.122.44 – 10.2.122.44	10.2.122.44
46	10.2.122.45/32	10.2.122.45 – 10.2.122.45	10.2.122.45
47	10.2.122.46/32	10.2.122.46 – 10.2.122.46	10.2.122.46
48	10.2.122.47/32	10.2.122.47 – 10.2.122.47	10.2.122.47
49	10.2.122.48/32	10.2.122.48 – 10.2.122.48	10.2.122.48
50	10.2.122.49/32	10.2.122.49 – 10.2.122.49	10.2.122.49
51	10.2.122.50/32	10.2.122.50 – 10.2.122.50	10.2.122.50
52	10.2.122.51/32	10.2.122.51 – 10.2.122.51	10.2.122.51
53	10.2.122.52/32	10.2.122.52 – 10.2.122.52	10.2.122.52
54	10.2.122.53/32	10.2.122.53 – 10.2.122.53	10.2.122.53
55	10.2.122.54/32	10.2.122.54 – 10.2.122.54	10.2.122.54
56	10.2.122.55/32	10.2.122.55 – 10.2.122.55	10.2.122.55
57	10.2.122.56/32	10.2.122.56 – 10.2.122.56	10.2.122.56
58	10.2.122.57/32	10.2.122.57 – 10.2.122.57	10.2.122.57
59	10.2.122.58/32	10.2.122.58 – 10.2.122.58	10.2.122.58
60	10.2.122.59/32	10.2.122.59 – 10.2.122.59	10.2.122.59
61	10.2.122.60/32	10.2.122.60 – 10.2.122.60	10.2.122.60
62	10.2.122.61/32	10.2.122.61 – 10.2.122.61	10.2.122.61
63	10.2.122.62/32	10.2.122.62 – 10.2.122.62	10.2.122.62
64	10.2.122.63/32	10.2.122.63 – 10.2.122.63	10.2.122.63
65	10.2.122.64/32	10.2.122.64 – 10.2.122.64	10.2.122.64
66	10.2.122.65/32	10.2.122.65 – 10.2.122.65	10.2.122.65
67	10.2.122.66/32	10.2.122.66 – 10.2.122.66	10.2.122.66
68	10.2.122.67/32	10.2.122.67 – 10.2.122.67	10.2.122.67
69	10.2.122.68/32	10.2.122.68 – 10.2.122.68	10.2.122.68
70	10.2.122.69/32	10.2.122.69 – 10.2.122.69	10.2.122.69
71	10.2.122.70/32	10.2.122.70 – 10.2.122.70	10.2.122.70
72	10.2.122.71/32	10.2.122.71 – 10.2.122.71	10.2.122.71
73	10.2.122.72/32	10.2.122.72 – 10.2.122.72	10.2.122.72
74	10.2.122.73/32	10.2.122.73 – 10.2.122.73	10.2.122.73
75	10.2.122.74/32	10.2.122.74 – 10.2.122.74	10.2.122.74
76	10.2.122.75/32	10.2.122.75 – 10.2.122.75	10.2.122.75
77	10.2.122.76/32	10.2.122.76 – 10.2.122.76	10.2.122.76
78	10.2.122.77/32	10.2.122.77 – 10.2.122.77	10.2.122.77
79	10.2.122.78/32	10.2.122.78 – 10.2.122.78	10.2.122.78
80	10.2.122.79/32	10.2.122.79 – 10.2.122.79	10.2.122.79
81	10.2.122.80/32	10.2.122.80 – 10.2.122.80	10.2.122.80
82	10.2.122.81/32	10.2.122.81 – 10.2.122.81	10.2.122.81
83	10.2.122.82/32	10.2.122.82 – 10.2.122.82	10.2.122.82
84	10.2.122.83/32	10.2.122.83 – 10.2.122.83	10.2.122.83
85	10.2.122.84/32	10.2.122.84 – 10.2.122.84	10.2.122.84
86	10.2.122.85/32	10.2.122.85 – 10.2.122.85	10.2.122.85
87	10.2.122.86/32	10.2.122.86 – 10.2.122.86	10.2.122.86
88	10.2.122.87/32	10.2.122.87 – 10.2.122.87	10.2.122.87
89	10.2.122.88/32	10.2.122.88 – 10.2.122.88	10.2.122.88
90	10.2.122.89/32	10.2.122.89 – 10.2.122.89	10.2.122.89
91	10.2.122.90/32	10.2.122.90 – 10.2.122.90	10.2.122.90
92	10.2.122.91/32	10.2.122.91 – 10.2.122.91	10.2.122.91
93	10.2.122.92/32	10.2.122.92 – 10.2.122.92	10.2.122.92
94	10.2.122.93/32	10.2.122.93 – 10.2.122.93	10.2.122.93
95	10.2.122.94/32	10.2.122.94 – 10.2.122.94	10.2.122.94
96	10.2.122.95/32	10.2.122.95 – 10.2.122.95	10.2.122.95
97	10.2.122.96/32	10.2.122.96 – 10.2.122.96	10.2.122.96
98	10.2.122.97/32	10.2.122.97 – 10.2.122.97	10.2.122.97
99	10.2.122.98/32	10.2.122.98 – 10.2.122.98	10.2.122.98
100	10.2.122.99/32	10.2.122.99 – 10.2.122.99	10.2.122.99
101	10.2.122.100/32	10.2.122.100 – 10.2.122.100	10.2.122.100
102	10.2.122.101/32	10.2.122.101 – 10.2.122.101	10.2.122.101
103	10.2.122.102/32	10.2.122.102 – 10.2.122.102	10.2.122.102
104	10.2.122.103/32	10.2.122.103 – 10.2.122.103	10.2.122.103
105	10.2.122.104/32	10.2.122.104 – 10.2.122.104	10.2.122.104
106	10.2.122.105/32	10.2.122.105 – 10.2.122.105	10.2.122.105
107	10.2.122.106/32	10.2.122.106 – 10.2.122.106	10.2.122.106
108	10.2.122.107/32	10.2.122.107 – 10.2.122.107	10.2.122.107
109	10.2.122.108/32	10.2.122.108 – 10.2.122.108	10.2.122.108
110	10.2.122.109/32	10.2.122.109 – 10.2.122.109	10.2.122.109
111	10.2.122.110/32	10.2.122.110 – 10.2.122.110	10.2.122.110
112	10.2.122.111/32	10.2.122.111 – 10.2.122.111	10.2.122.111
113	10.2.122.112/32	10.2.122.112 – 10.2.122.112	10.2.122.112
114	10.2.122.113/32	10.2.122.113 – 10.2.122.113	10.2.122.113
115	10.2.122.114/32	10.2.122.114 – 10.2.122.114	10.2.122.114
116	10.2.122.115/32	10.2.122.115 – 10.2.122.115	10.2.122.115
117	10.2.122.116/32	10.2.122.116 – 10.2.122.116	10.2.122.116
118	10.2.122.117/32	10.2.122.117 – 10.2.122.117	10.2.122.117
119	10.2.122.118/32	10.2.122.118 – 10.2.122.118	10.2.122.118
120	10.2.122.119/32	10.2.122.119 – 10.2.122.119	10.2.122.119
121	10.2.122.120/32	10.2.122.120 – 10.2.122.120	10.2.122.120
122	10.2.122.121/32	10.2.122.121 – 10.2.122.121	10.2.122.121
123	10.2.122.122/32	10.2.122.122 – 10.2.122.122	10.2.122.122
124	10.2.122.123/32	10.2.122.123 – 10.2.122.123	10.2.122.123
125	10.2.122.124/32	10.2.122.124 – 10.2.122.124	10.2.122.124
126	10.2.122.125/32	10.2.122.125 – 10.2.122.125	10.2.122.125
127	10.2.122.126/32	10.2.122.126 – 10.2.122.126	10.2.122.126
128	10.2.122.127/32	10.2.122.127 – 10.2.122.127	10.2.122.127
129	10.2.122.128/32	10.2.122.128 – 10.2.122.128	10.2.122.128
130	10.2.122.129/32	10.2.122.129 – 10.2.122.129	10.2.122.129
131	10.2.122.130/32	10.2.122.130 – 10.2.122.130	10.2.122.130
132	10.2.122.131/32	10.2.122.131 – 10.2.122.131	10.2.122.131
133	10.2.122.132/32	10.2.122.132 – 10.2.122.132	10.2.122.132
134	10.2.122.133/32	10.2.122.133 – 10.2.122.133	10.2.122.133
135	10.2.122.134/32	10.2.122.134 – 10.2.122.134	10.2.122.134
136	10.2.122.135/32	10.2.122.135 – 10.2.122.135	10.2.122.135
137	10.2.122.136/32	10.2.122.136 – 10.2.122.136	10.2.122.136
138	10.2.122.137/32	10.2.122.137 – 10.2.122.137	10.2.122.137
139	10.2.122.138/32	10.2.122.138 – 10.2.122.138	10.2.122.138
140	10.2.122.139/32	10.2.122.139 – 10.2.122.139	10.2.122.139
141	10.2.122.140/32	10.2.122.140 – 10.2.122.140	10.2.122.140
142	10.2.122.141/32	10.2.122.141 – 10.2.122.141	10.2.122.141
143	10.2.122.142/32	10.2.122.142 – 10.2.122.142	10.2.122.142
144	10.2.122.143/32	10.2.122.143 – 10.2.122.143	10.2.122.143
145	10.2.122.144/32	10.2.122.144 – 10.2.122.144	10.2.122.144
146	10.2.122.145/32	10.2.122.145 – 10.2.122.145	10.2.122.145
147	10.2.122.146/32	10.2.122.146 – 10.2.122.146	10.2.122.146
148	10.2.122.147/32	10.2.122.147 – 10.2.122.147	10.2.122.147
149	10.2.122.148/32	10.2.122.148 – 10.2.122.148	10.2.122.148
150	10.2.122.149/32	10.2.122.149 – 10.2.122.149	10.2.122.149
151	10.2.122.150/32	10.2.122.150 – 10.2.122.150	10.2.122.150
152	10.2.122.151/32	10.2.122.151 – 10.2.122.151	10.2.122.151
153	10.2.122.152/32	10.2.122.152 – 10.2.122.152	10.2.122.152
154	10.2.122.153/32	10.2.122.153 – 10.2.122.153	10.2.122.153
155	10.2.122.154/32	10.2.122.154 – 10.2.122.154	10.2.122.154
156	10.2.122.155/32	10.2.122.155 – 10.2.122.155	10.2.122.155
157	10.2.122.156/32	10.2.122.156 – 10.2.122.156	10.2.122.156
158	10.2.122.157/32	10.2.122.157 – 10.2.122.157	10.2.122.157
159	10.2.122.158/32	10.2.122.158 – 10.2.122.158	10.2.122.158
160	10.2.122.159/32	10.2.122.159 – 10.2.122.159	10.2.122.159
161	10.2.122.160/32	10.2.122.160 – 10.2.122.160	10.2.122.160
162	10.2.122.161/32	10.2.122.161 – 10.2.122.161	10.2.122.161
163	10.2.122.162/32	10.2.122.162 – 10.2.122.162	10.2.122.162
164	10.2.122.163/32	10.2.122.163 – 10.2.122.163	10.2.122.163
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169	10.2.122.168/32	10.2.122.168 – 10.2.122.168	10.2.122.168
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210	10.2.122.209/32	10.2.122.209 – 10.2.122.209	10.2.122.209
211	10.2.122.210/32	10.2.122.210 – 10.2.122.210	10.2.122.210
212	10.2.122.211/32	10.2.122.211 – 10.2.122.211	10.2.122.211
213	10.2.122.212/32	10.2.122.212 – 10.2.122.212	10.2.122.212
214	10.2.122.213/32	10.2.122.213 – 10.2.122.213	10.2.122.213
215	10.2.122.214/32	10.2.122.214 – 10.2.122.214	10.2.122.214
216	10.2.122.215/32	10.2.122.215 – 10.2.122.215	10.2.122.215
217	10.2.122.216/32	10.2.122.216 – 10.2.122.216	10.2.122.216
218	10.2.122.217/32	10.2.122.217 – 10.2.122.217	10.2.122.217
219	10.2.122.218/32	10.2.122.218 – 10.2.122.218	10.2.122.218
220	10.2.122.219/32	10.2.122.219 – 10.2.122.219	10.2.122.219
221	10.2.122.220/32	10.2.122.220 – 10.2.122.220	10.2.122.220
222	10.2.122.221/32	10.2.122.221 – 10.2.122.221	10.2.122.221
223	10.2.122.222/32	10.2.122.222 – 10.2.122.222	10.2.122.222
224	10.2.122.223/32	10.2.122.223 – 10.2.122.223	10.2.122.223
225	10.2.122.224/32	10.2.122.224 – 10.2.122.224	10.2.122.224
226	10.2.122.225/32	10.2.122.225 – 10.2.122.225	10.2.122.225
227	10.2.122.226/32	10.2.122.226 – 10.2.122.226	10.2.122.226
228	10.2.122.227/32	10.2.122.227 – 10.2.122.227	10.2.122.227
229	10.2.122.228/32	10.2.122.228 – 10.2.122.228	10.2.122.228
230	10.2.122.229/32	10.2.122.229 – 10.2.122.229	10.2.122.229
231	10.2.122.230/32	10.2.122.230 – 10.2.122.230	10.2.122.230
232	10.2.122.231/32	10.2.122.231 – 10.2.122.231	10.2.122.231
233	10.2.122.232/32	10.2.122.232 – 10.2.122.232	10.2.122.232
234	10.2.122.233/32	10.2.122.233 – 10.2.122.233	10.2.122.233
235	10.2.122.234/32	10.2.122.234 – 10.2.122.234	10.2.122.234
236	10.2.122.235/32	10.2.122.235 – 10.2.122.235	10.2.122.235
237	10.2.122.236/32	10.2.122.236 – 10.2.122.236	10.2.122.236
238	10.2.122.237/32	10.2.122.237 – 10.2.122.237	10.2.122.237
239	10.2.122.238/32	10.2.122.238 – 10.2.122.238	10.2.122.238
240	10.2.122.239/32	10.2.122.239 – 10.2.122.239	10.2.122.239
241	10.2.122.240/32	10.2.122.240 – 10.2.122.240	10.2.122.240
242	10.2.122.241/32	10.2.122.241 – 10.2.122.241	10.2.122.241
243	10.2.122.242/32	10.2.122.242 – 10.2.122.242	10.2.122.242
244	10.2.122.243/32	10.2.122.243 – 10.2.122.243	10.2.122.243
245	10.2.122.244/32	10.2.122.244 – 10.2.122.244	10.2.122.244
246	10.2.122.245/32	10.2.122.245 – 10.2.122.245	10.2.122.245
247	10.2.122.246/32	10.2.122.246 – 10.2.122.246	10.2.122.246
248	10.2.122.247/32	10.2.122.247 – 10.2.122.247	10.2.122.247
249	10.2.122.248/32	10.2.122.248 – 10.2.122.248	10.2.122.248
250	10.2.122.249/32	10.2.122.249 – 10.2.122.249	10.2.122.249
251	10.2.122.250/32	10.2.122.250 – 10.2.122.250	10.2.122.250
252	10.2.122.251/32	10.2.122.251 – 10.2.122.251	10.2.122.251
253	10.2.122.252/32	10.2.122.252 – 10.2.122.252	10.2.122.252
254	10.2.122.253/32	10.2.122.253 – 10.2.122.253	10.2.122.253
255	10.2.122.254/32	10.2.122.254 – 10.2.122.254	10.2.122.254
256	10.2.122.255/32	10.2.122.255 – 10.2.122.255	10.2.122.255

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 →