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)10.2.126.0/24

network10.2.126.0/24

broadcast10.2.126.255

first host10.2.126.1

last host10.2.126.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.2.126.0/24

address00001010.00000010.01111110.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000010.01111110.00000000

broadcast00001010.00000010.01111110.11111111

green = network part, grey = host part

hex0x0a027e00

decimal167935488

reverse dns0.126.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:7e00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.126.0/32	10.2.126.0 – 10.2.126.0	10.2.126.0
2	10.2.126.1/32	10.2.126.1 – 10.2.126.1	10.2.126.1
3	10.2.126.2/32	10.2.126.2 – 10.2.126.2	10.2.126.2
4	10.2.126.3/32	10.2.126.3 – 10.2.126.3	10.2.126.3
5	10.2.126.4/32	10.2.126.4 – 10.2.126.4	10.2.126.4
6	10.2.126.5/32	10.2.126.5 – 10.2.126.5	10.2.126.5
7	10.2.126.6/32	10.2.126.6 – 10.2.126.6	10.2.126.6
8	10.2.126.7/32	10.2.126.7 – 10.2.126.7	10.2.126.7
9	10.2.126.8/32	10.2.126.8 – 10.2.126.8	10.2.126.8
10	10.2.126.9/32	10.2.126.9 – 10.2.126.9	10.2.126.9
11	10.2.126.10/32	10.2.126.10 – 10.2.126.10	10.2.126.10
12	10.2.126.11/32	10.2.126.11 – 10.2.126.11	10.2.126.11
13	10.2.126.12/32	10.2.126.12 – 10.2.126.12	10.2.126.12
14	10.2.126.13/32	10.2.126.13 – 10.2.126.13	10.2.126.13
15	10.2.126.14/32	10.2.126.14 – 10.2.126.14	10.2.126.14
16	10.2.126.15/32	10.2.126.15 – 10.2.126.15	10.2.126.15
17	10.2.126.16/32	10.2.126.16 – 10.2.126.16	10.2.126.16
18	10.2.126.17/32	10.2.126.17 – 10.2.126.17	10.2.126.17
19	10.2.126.18/32	10.2.126.18 – 10.2.126.18	10.2.126.18
20	10.2.126.19/32	10.2.126.19 – 10.2.126.19	10.2.126.19
21	10.2.126.20/32	10.2.126.20 – 10.2.126.20	10.2.126.20
22	10.2.126.21/32	10.2.126.21 – 10.2.126.21	10.2.126.21
23	10.2.126.22/32	10.2.126.22 – 10.2.126.22	10.2.126.22
24	10.2.126.23/32	10.2.126.23 – 10.2.126.23	10.2.126.23
25	10.2.126.24/32	10.2.126.24 – 10.2.126.24	10.2.126.24
26	10.2.126.25/32	10.2.126.25 – 10.2.126.25	10.2.126.25
27	10.2.126.26/32	10.2.126.26 – 10.2.126.26	10.2.126.26
28	10.2.126.27/32	10.2.126.27 – 10.2.126.27	10.2.126.27
29	10.2.126.28/32	10.2.126.28 – 10.2.126.28	10.2.126.28
30	10.2.126.29/32	10.2.126.29 – 10.2.126.29	10.2.126.29
31	10.2.126.30/32	10.2.126.30 – 10.2.126.30	10.2.126.30
32	10.2.126.31/32	10.2.126.31 – 10.2.126.31	10.2.126.31
33	10.2.126.32/32	10.2.126.32 – 10.2.126.32	10.2.126.32
34	10.2.126.33/32	10.2.126.33 – 10.2.126.33	10.2.126.33
35	10.2.126.34/32	10.2.126.34 – 10.2.126.34	10.2.126.34
36	10.2.126.35/32	10.2.126.35 – 10.2.126.35	10.2.126.35
37	10.2.126.36/32	10.2.126.36 – 10.2.126.36	10.2.126.36
38	10.2.126.37/32	10.2.126.37 – 10.2.126.37	10.2.126.37
39	10.2.126.38/32	10.2.126.38 – 10.2.126.38	10.2.126.38
40	10.2.126.39/32	10.2.126.39 – 10.2.126.39	10.2.126.39
41	10.2.126.40/32	10.2.126.40 – 10.2.126.40	10.2.126.40
42	10.2.126.41/32	10.2.126.41 – 10.2.126.41	10.2.126.41
43	10.2.126.42/32	10.2.126.42 – 10.2.126.42	10.2.126.42
44	10.2.126.43/32	10.2.126.43 – 10.2.126.43	10.2.126.43
45	10.2.126.44/32	10.2.126.44 – 10.2.126.44	10.2.126.44
46	10.2.126.45/32	10.2.126.45 – 10.2.126.45	10.2.126.45
47	10.2.126.46/32	10.2.126.46 – 10.2.126.46	10.2.126.46
48	10.2.126.47/32	10.2.126.47 – 10.2.126.47	10.2.126.47
49	10.2.126.48/32	10.2.126.48 – 10.2.126.48	10.2.126.48
50	10.2.126.49/32	10.2.126.49 – 10.2.126.49	10.2.126.49
51	10.2.126.50/32	10.2.126.50 – 10.2.126.50	10.2.126.50
52	10.2.126.51/32	10.2.126.51 – 10.2.126.51	10.2.126.51
53	10.2.126.52/32	10.2.126.52 – 10.2.126.52	10.2.126.52
54	10.2.126.53/32	10.2.126.53 – 10.2.126.53	10.2.126.53
55	10.2.126.54/32	10.2.126.54 – 10.2.126.54	10.2.126.54
56	10.2.126.55/32	10.2.126.55 – 10.2.126.55	10.2.126.55
57	10.2.126.56/32	10.2.126.56 – 10.2.126.56	10.2.126.56
58	10.2.126.57/32	10.2.126.57 – 10.2.126.57	10.2.126.57
59	10.2.126.58/32	10.2.126.58 – 10.2.126.58	10.2.126.58
60	10.2.126.59/32	10.2.126.59 – 10.2.126.59	10.2.126.59
61	10.2.126.60/32	10.2.126.60 – 10.2.126.60	10.2.126.60
62	10.2.126.61/32	10.2.126.61 – 10.2.126.61	10.2.126.61
63	10.2.126.62/32	10.2.126.62 – 10.2.126.62	10.2.126.62
64	10.2.126.63/32	10.2.126.63 – 10.2.126.63	10.2.126.63
65	10.2.126.64/32	10.2.126.64 – 10.2.126.64	10.2.126.64
66	10.2.126.65/32	10.2.126.65 – 10.2.126.65	10.2.126.65
67	10.2.126.66/32	10.2.126.66 – 10.2.126.66	10.2.126.66
68	10.2.126.67/32	10.2.126.67 – 10.2.126.67	10.2.126.67
69	10.2.126.68/32	10.2.126.68 – 10.2.126.68	10.2.126.68
70	10.2.126.69/32	10.2.126.69 – 10.2.126.69	10.2.126.69
71	10.2.126.70/32	10.2.126.70 – 10.2.126.70	10.2.126.70
72	10.2.126.71/32	10.2.126.71 – 10.2.126.71	10.2.126.71
73	10.2.126.72/32	10.2.126.72 – 10.2.126.72	10.2.126.72
74	10.2.126.73/32	10.2.126.73 – 10.2.126.73	10.2.126.73
75	10.2.126.74/32	10.2.126.74 – 10.2.126.74	10.2.126.74
76	10.2.126.75/32	10.2.126.75 – 10.2.126.75	10.2.126.75
77	10.2.126.76/32	10.2.126.76 – 10.2.126.76	10.2.126.76
78	10.2.126.77/32	10.2.126.77 – 10.2.126.77	10.2.126.77
79	10.2.126.78/32	10.2.126.78 – 10.2.126.78	10.2.126.78
80	10.2.126.79/32	10.2.126.79 – 10.2.126.79	10.2.126.79
81	10.2.126.80/32	10.2.126.80 – 10.2.126.80	10.2.126.80
82	10.2.126.81/32	10.2.126.81 – 10.2.126.81	10.2.126.81
83	10.2.126.82/32	10.2.126.82 – 10.2.126.82	10.2.126.82
84	10.2.126.83/32	10.2.126.83 – 10.2.126.83	10.2.126.83
85	10.2.126.84/32	10.2.126.84 – 10.2.126.84	10.2.126.84
86	10.2.126.85/32	10.2.126.85 – 10.2.126.85	10.2.126.85
87	10.2.126.86/32	10.2.126.86 – 10.2.126.86	10.2.126.86
88	10.2.126.87/32	10.2.126.87 – 10.2.126.87	10.2.126.87
89	10.2.126.88/32	10.2.126.88 – 10.2.126.88	10.2.126.88
90	10.2.126.89/32	10.2.126.89 – 10.2.126.89	10.2.126.89
91	10.2.126.90/32	10.2.126.90 – 10.2.126.90	10.2.126.90
92	10.2.126.91/32	10.2.126.91 – 10.2.126.91	10.2.126.91
93	10.2.126.92/32	10.2.126.92 – 10.2.126.92	10.2.126.92
94	10.2.126.93/32	10.2.126.93 – 10.2.126.93	10.2.126.93
95	10.2.126.94/32	10.2.126.94 – 10.2.126.94	10.2.126.94
96	10.2.126.95/32	10.2.126.95 – 10.2.126.95	10.2.126.95
97	10.2.126.96/32	10.2.126.96 – 10.2.126.96	10.2.126.96
98	10.2.126.97/32	10.2.126.97 – 10.2.126.97	10.2.126.97
99	10.2.126.98/32	10.2.126.98 – 10.2.126.98	10.2.126.98
100	10.2.126.99/32	10.2.126.99 – 10.2.126.99	10.2.126.99
101	10.2.126.100/32	10.2.126.100 – 10.2.126.100	10.2.126.100
102	10.2.126.101/32	10.2.126.101 – 10.2.126.101	10.2.126.101
103	10.2.126.102/32	10.2.126.102 – 10.2.126.102	10.2.126.102
104	10.2.126.103/32	10.2.126.103 – 10.2.126.103	10.2.126.103
105	10.2.126.104/32	10.2.126.104 – 10.2.126.104	10.2.126.104
106	10.2.126.105/32	10.2.126.105 – 10.2.126.105	10.2.126.105
107	10.2.126.106/32	10.2.126.106 – 10.2.126.106	10.2.126.106
108	10.2.126.107/32	10.2.126.107 – 10.2.126.107	10.2.126.107
109	10.2.126.108/32	10.2.126.108 – 10.2.126.108	10.2.126.108
110	10.2.126.109/32	10.2.126.109 – 10.2.126.109	10.2.126.109
111	10.2.126.110/32	10.2.126.110 – 10.2.126.110	10.2.126.110
112	10.2.126.111/32	10.2.126.111 – 10.2.126.111	10.2.126.111
113	10.2.126.112/32	10.2.126.112 – 10.2.126.112	10.2.126.112
114	10.2.126.113/32	10.2.126.113 – 10.2.126.113	10.2.126.113
115	10.2.126.114/32	10.2.126.114 – 10.2.126.114	10.2.126.114
116	10.2.126.115/32	10.2.126.115 – 10.2.126.115	10.2.126.115
117	10.2.126.116/32	10.2.126.116 – 10.2.126.116	10.2.126.116
118	10.2.126.117/32	10.2.126.117 – 10.2.126.117	10.2.126.117
119	10.2.126.118/32	10.2.126.118 – 10.2.126.118	10.2.126.118
120	10.2.126.119/32	10.2.126.119 – 10.2.126.119	10.2.126.119
121	10.2.126.120/32	10.2.126.120 – 10.2.126.120	10.2.126.120
122	10.2.126.121/32	10.2.126.121 – 10.2.126.121	10.2.126.121
123	10.2.126.122/32	10.2.126.122 – 10.2.126.122	10.2.126.122
124	10.2.126.123/32	10.2.126.123 – 10.2.126.123	10.2.126.123
125	10.2.126.124/32	10.2.126.124 – 10.2.126.124	10.2.126.124
126	10.2.126.125/32	10.2.126.125 – 10.2.126.125	10.2.126.125
127	10.2.126.126/32	10.2.126.126 – 10.2.126.126	10.2.126.126
128	10.2.126.127/32	10.2.126.127 – 10.2.126.127	10.2.126.127
129	10.2.126.128/32	10.2.126.128 – 10.2.126.128	10.2.126.128
130	10.2.126.129/32	10.2.126.129 – 10.2.126.129	10.2.126.129
131	10.2.126.130/32	10.2.126.130 – 10.2.126.130	10.2.126.130
132	10.2.126.131/32	10.2.126.131 – 10.2.126.131	10.2.126.131
133	10.2.126.132/32	10.2.126.132 – 10.2.126.132	10.2.126.132
134	10.2.126.133/32	10.2.126.133 – 10.2.126.133	10.2.126.133
135	10.2.126.134/32	10.2.126.134 – 10.2.126.134	10.2.126.134
136	10.2.126.135/32	10.2.126.135 – 10.2.126.135	10.2.126.135
137	10.2.126.136/32	10.2.126.136 – 10.2.126.136	10.2.126.136
138	10.2.126.137/32	10.2.126.137 – 10.2.126.137	10.2.126.137
139	10.2.126.138/32	10.2.126.138 – 10.2.126.138	10.2.126.138
140	10.2.126.139/32	10.2.126.139 – 10.2.126.139	10.2.126.139
141	10.2.126.140/32	10.2.126.140 – 10.2.126.140	10.2.126.140
142	10.2.126.141/32	10.2.126.141 – 10.2.126.141	10.2.126.141
143	10.2.126.142/32	10.2.126.142 – 10.2.126.142	10.2.126.142
144	10.2.126.143/32	10.2.126.143 – 10.2.126.143	10.2.126.143
145	10.2.126.144/32	10.2.126.144 – 10.2.126.144	10.2.126.144
146	10.2.126.145/32	10.2.126.145 – 10.2.126.145	10.2.126.145
147	10.2.126.146/32	10.2.126.146 – 10.2.126.146	10.2.126.146
148	10.2.126.147/32	10.2.126.147 – 10.2.126.147	10.2.126.147
149	10.2.126.148/32	10.2.126.148 – 10.2.126.148	10.2.126.148
150	10.2.126.149/32	10.2.126.149 – 10.2.126.149	10.2.126.149
151	10.2.126.150/32	10.2.126.150 – 10.2.126.150	10.2.126.150
152	10.2.126.151/32	10.2.126.151 – 10.2.126.151	10.2.126.151
153	10.2.126.152/32	10.2.126.152 – 10.2.126.152	10.2.126.152
154	10.2.126.153/32	10.2.126.153 – 10.2.126.153	10.2.126.153
155	10.2.126.154/32	10.2.126.154 – 10.2.126.154	10.2.126.154
156	10.2.126.155/32	10.2.126.155 – 10.2.126.155	10.2.126.155
157	10.2.126.156/32	10.2.126.156 – 10.2.126.156	10.2.126.156
158	10.2.126.157/32	10.2.126.157 – 10.2.126.157	10.2.126.157
159	10.2.126.158/32	10.2.126.158 – 10.2.126.158	10.2.126.158
160	10.2.126.159/32	10.2.126.159 – 10.2.126.159	10.2.126.159
161	10.2.126.160/32	10.2.126.160 – 10.2.126.160	10.2.126.160
162	10.2.126.161/32	10.2.126.161 – 10.2.126.161	10.2.126.161
163	10.2.126.162/32	10.2.126.162 – 10.2.126.162	10.2.126.162
164	10.2.126.163/32	10.2.126.163 – 10.2.126.163	10.2.126.163
165	10.2.126.164/32	10.2.126.164 – 10.2.126.164	10.2.126.164
166	10.2.126.165/32	10.2.126.165 – 10.2.126.165	10.2.126.165
167	10.2.126.166/32	10.2.126.166 – 10.2.126.166	10.2.126.166
168	10.2.126.167/32	10.2.126.167 – 10.2.126.167	10.2.126.167
169	10.2.126.168/32	10.2.126.168 – 10.2.126.168	10.2.126.168
170	10.2.126.169/32	10.2.126.169 – 10.2.126.169	10.2.126.169
171	10.2.126.170/32	10.2.126.170 – 10.2.126.170	10.2.126.170
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210	10.2.126.209/32	10.2.126.209 – 10.2.126.209	10.2.126.209
211	10.2.126.210/32	10.2.126.210 – 10.2.126.210	10.2.126.210
212	10.2.126.211/32	10.2.126.211 – 10.2.126.211	10.2.126.211
213	10.2.126.212/32	10.2.126.212 – 10.2.126.212	10.2.126.212
214	10.2.126.213/32	10.2.126.213 – 10.2.126.213	10.2.126.213
215	10.2.126.214/32	10.2.126.214 – 10.2.126.214	10.2.126.214
216	10.2.126.215/32	10.2.126.215 – 10.2.126.215	10.2.126.215
217	10.2.126.216/32	10.2.126.216 – 10.2.126.216	10.2.126.216
218	10.2.126.217/32	10.2.126.217 – 10.2.126.217	10.2.126.217
219	10.2.126.218/32	10.2.126.218 – 10.2.126.218	10.2.126.218
220	10.2.126.219/32	10.2.126.219 – 10.2.126.219	10.2.126.219
221	10.2.126.220/32	10.2.126.220 – 10.2.126.220	10.2.126.220
222	10.2.126.221/32	10.2.126.221 – 10.2.126.221	10.2.126.221
223	10.2.126.222/32	10.2.126.222 – 10.2.126.222	10.2.126.222
224	10.2.126.223/32	10.2.126.223 – 10.2.126.223	10.2.126.223
225	10.2.126.224/32	10.2.126.224 – 10.2.126.224	10.2.126.224
226	10.2.126.225/32	10.2.126.225 – 10.2.126.225	10.2.126.225
227	10.2.126.226/32	10.2.126.226 – 10.2.126.226	10.2.126.226
228	10.2.126.227/32	10.2.126.227 – 10.2.126.227	10.2.126.227
229	10.2.126.228/32	10.2.126.228 – 10.2.126.228	10.2.126.228
230	10.2.126.229/32	10.2.126.229 – 10.2.126.229	10.2.126.229
231	10.2.126.230/32	10.2.126.230 – 10.2.126.230	10.2.126.230
232	10.2.126.231/32	10.2.126.231 – 10.2.126.231	10.2.126.231
233	10.2.126.232/32	10.2.126.232 – 10.2.126.232	10.2.126.232
234	10.2.126.233/32	10.2.126.233 – 10.2.126.233	10.2.126.233
235	10.2.126.234/32	10.2.126.234 – 10.2.126.234	10.2.126.234
236	10.2.126.235/32	10.2.126.235 – 10.2.126.235	10.2.126.235
237	10.2.126.236/32	10.2.126.236 – 10.2.126.236	10.2.126.236
238	10.2.126.237/32	10.2.126.237 – 10.2.126.237	10.2.126.237
239	10.2.126.238/32	10.2.126.238 – 10.2.126.238	10.2.126.238
240	10.2.126.239/32	10.2.126.239 – 10.2.126.239	10.2.126.239
241	10.2.126.240/32	10.2.126.240 – 10.2.126.240	10.2.126.240
242	10.2.126.241/32	10.2.126.241 – 10.2.126.241	10.2.126.241
243	10.2.126.242/32	10.2.126.242 – 10.2.126.242	10.2.126.242
244	10.2.126.243/32	10.2.126.243 – 10.2.126.243	10.2.126.243
245	10.2.126.244/32	10.2.126.244 – 10.2.126.244	10.2.126.244
246	10.2.126.245/32	10.2.126.245 – 10.2.126.245	10.2.126.245
247	10.2.126.246/32	10.2.126.246 – 10.2.126.246	10.2.126.246
248	10.2.126.247/32	10.2.126.247 – 10.2.126.247	10.2.126.247
249	10.2.126.248/32	10.2.126.248 – 10.2.126.248	10.2.126.248
250	10.2.126.249/32	10.2.126.249 – 10.2.126.249	10.2.126.249
251	10.2.126.250/32	10.2.126.250 – 10.2.126.250	10.2.126.250
252	10.2.126.251/32	10.2.126.251 – 10.2.126.251	10.2.126.251
253	10.2.126.252/32	10.2.126.252 – 10.2.126.252	10.2.126.252
254	10.2.126.253/32	10.2.126.253 – 10.2.126.253	10.2.126.253
255	10.2.126.254/32	10.2.126.254 – 10.2.126.254	10.2.126.254
256	10.2.126.255/32	10.2.126.255 – 10.2.126.255	10.2.126.255

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 →