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)10.28.64.0/19

network10.28.64.0/19

broadcast10.28.95.255

first host10.28.64.1

last host10.28.95.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.28.64.0/19

address00001010.00011100.01000000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00011100.01000000.00000000

broadcast00001010.00011100.01011111.11111111

green = network part, grey = host part

hex0x0a1c4000

decimal169623552

reverse dns0.64.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:4000

/19 split into /32 · 8,192 subnets

close ×

#	network	host range	broadcast
1	10.28.64.0/32	10.28.64.0 – 10.28.64.0	10.28.64.0
2	10.28.64.1/32	10.28.64.1 – 10.28.64.1	10.28.64.1
3	10.28.64.2/32	10.28.64.2 – 10.28.64.2	10.28.64.2
4	10.28.64.3/32	10.28.64.3 – 10.28.64.3	10.28.64.3
5	10.28.64.4/32	10.28.64.4 – 10.28.64.4	10.28.64.4
6	10.28.64.5/32	10.28.64.5 – 10.28.64.5	10.28.64.5
7	10.28.64.6/32	10.28.64.6 – 10.28.64.6	10.28.64.6
8	10.28.64.7/32	10.28.64.7 – 10.28.64.7	10.28.64.7
9	10.28.64.8/32	10.28.64.8 – 10.28.64.8	10.28.64.8
10	10.28.64.9/32	10.28.64.9 – 10.28.64.9	10.28.64.9
11	10.28.64.10/32	10.28.64.10 – 10.28.64.10	10.28.64.10
12	10.28.64.11/32	10.28.64.11 – 10.28.64.11	10.28.64.11
13	10.28.64.12/32	10.28.64.12 – 10.28.64.12	10.28.64.12
14	10.28.64.13/32	10.28.64.13 – 10.28.64.13	10.28.64.13
15	10.28.64.14/32	10.28.64.14 – 10.28.64.14	10.28.64.14
16	10.28.64.15/32	10.28.64.15 – 10.28.64.15	10.28.64.15
17	10.28.64.16/32	10.28.64.16 – 10.28.64.16	10.28.64.16
18	10.28.64.17/32	10.28.64.17 – 10.28.64.17	10.28.64.17
19	10.28.64.18/32	10.28.64.18 – 10.28.64.18	10.28.64.18
20	10.28.64.19/32	10.28.64.19 – 10.28.64.19	10.28.64.19
21	10.28.64.20/32	10.28.64.20 – 10.28.64.20	10.28.64.20
22	10.28.64.21/32	10.28.64.21 – 10.28.64.21	10.28.64.21
23	10.28.64.22/32	10.28.64.22 – 10.28.64.22	10.28.64.22
24	10.28.64.23/32	10.28.64.23 – 10.28.64.23	10.28.64.23
25	10.28.64.24/32	10.28.64.24 – 10.28.64.24	10.28.64.24
26	10.28.64.25/32	10.28.64.25 – 10.28.64.25	10.28.64.25
27	10.28.64.26/32	10.28.64.26 – 10.28.64.26	10.28.64.26
28	10.28.64.27/32	10.28.64.27 – 10.28.64.27	10.28.64.27
29	10.28.64.28/32	10.28.64.28 – 10.28.64.28	10.28.64.28
30	10.28.64.29/32	10.28.64.29 – 10.28.64.29	10.28.64.29
31	10.28.64.30/32	10.28.64.30 – 10.28.64.30	10.28.64.30
32	10.28.64.31/32	10.28.64.31 – 10.28.64.31	10.28.64.31
33	10.28.64.32/32	10.28.64.32 – 10.28.64.32	10.28.64.32
34	10.28.64.33/32	10.28.64.33 – 10.28.64.33	10.28.64.33
35	10.28.64.34/32	10.28.64.34 – 10.28.64.34	10.28.64.34
36	10.28.64.35/32	10.28.64.35 – 10.28.64.35	10.28.64.35
37	10.28.64.36/32	10.28.64.36 – 10.28.64.36	10.28.64.36
38	10.28.64.37/32	10.28.64.37 – 10.28.64.37	10.28.64.37
39	10.28.64.38/32	10.28.64.38 – 10.28.64.38	10.28.64.38
40	10.28.64.39/32	10.28.64.39 – 10.28.64.39	10.28.64.39
41	10.28.64.40/32	10.28.64.40 – 10.28.64.40	10.28.64.40
42	10.28.64.41/32	10.28.64.41 – 10.28.64.41	10.28.64.41
43	10.28.64.42/32	10.28.64.42 – 10.28.64.42	10.28.64.42
44	10.28.64.43/32	10.28.64.43 – 10.28.64.43	10.28.64.43
45	10.28.64.44/32	10.28.64.44 – 10.28.64.44	10.28.64.44
46	10.28.64.45/32	10.28.64.45 – 10.28.64.45	10.28.64.45
47	10.28.64.46/32	10.28.64.46 – 10.28.64.46	10.28.64.46
48	10.28.64.47/32	10.28.64.47 – 10.28.64.47	10.28.64.47
49	10.28.64.48/32	10.28.64.48 – 10.28.64.48	10.28.64.48
50	10.28.64.49/32	10.28.64.49 – 10.28.64.49	10.28.64.49
51	10.28.64.50/32	10.28.64.50 – 10.28.64.50	10.28.64.50
52	10.28.64.51/32	10.28.64.51 – 10.28.64.51	10.28.64.51
53	10.28.64.52/32	10.28.64.52 – 10.28.64.52	10.28.64.52
54	10.28.64.53/32	10.28.64.53 – 10.28.64.53	10.28.64.53
55	10.28.64.54/32	10.28.64.54 – 10.28.64.54	10.28.64.54
56	10.28.64.55/32	10.28.64.55 – 10.28.64.55	10.28.64.55
57	10.28.64.56/32	10.28.64.56 – 10.28.64.56	10.28.64.56
58	10.28.64.57/32	10.28.64.57 – 10.28.64.57	10.28.64.57
59	10.28.64.58/32	10.28.64.58 – 10.28.64.58	10.28.64.58
60	10.28.64.59/32	10.28.64.59 – 10.28.64.59	10.28.64.59
61	10.28.64.60/32	10.28.64.60 – 10.28.64.60	10.28.64.60
62	10.28.64.61/32	10.28.64.61 – 10.28.64.61	10.28.64.61
63	10.28.64.62/32	10.28.64.62 – 10.28.64.62	10.28.64.62
64	10.28.64.63/32	10.28.64.63 – 10.28.64.63	10.28.64.63
65	10.28.64.64/32	10.28.64.64 – 10.28.64.64	10.28.64.64
66	10.28.64.65/32	10.28.64.65 – 10.28.64.65	10.28.64.65
67	10.28.64.66/32	10.28.64.66 – 10.28.64.66	10.28.64.66
68	10.28.64.67/32	10.28.64.67 – 10.28.64.67	10.28.64.67
69	10.28.64.68/32	10.28.64.68 – 10.28.64.68	10.28.64.68
70	10.28.64.69/32	10.28.64.69 – 10.28.64.69	10.28.64.69
71	10.28.64.70/32	10.28.64.70 – 10.28.64.70	10.28.64.70
72	10.28.64.71/32	10.28.64.71 – 10.28.64.71	10.28.64.71
73	10.28.64.72/32	10.28.64.72 – 10.28.64.72	10.28.64.72
74	10.28.64.73/32	10.28.64.73 – 10.28.64.73	10.28.64.73
75	10.28.64.74/32	10.28.64.74 – 10.28.64.74	10.28.64.74
76	10.28.64.75/32	10.28.64.75 – 10.28.64.75	10.28.64.75
77	10.28.64.76/32	10.28.64.76 – 10.28.64.76	10.28.64.76
78	10.28.64.77/32	10.28.64.77 – 10.28.64.77	10.28.64.77
79	10.28.64.78/32	10.28.64.78 – 10.28.64.78	10.28.64.78
80	10.28.64.79/32	10.28.64.79 – 10.28.64.79	10.28.64.79
81	10.28.64.80/32	10.28.64.80 – 10.28.64.80	10.28.64.80
82	10.28.64.81/32	10.28.64.81 – 10.28.64.81	10.28.64.81
83	10.28.64.82/32	10.28.64.82 – 10.28.64.82	10.28.64.82
84	10.28.64.83/32	10.28.64.83 – 10.28.64.83	10.28.64.83
85	10.28.64.84/32	10.28.64.84 – 10.28.64.84	10.28.64.84
86	10.28.64.85/32	10.28.64.85 – 10.28.64.85	10.28.64.85
87	10.28.64.86/32	10.28.64.86 – 10.28.64.86	10.28.64.86
88	10.28.64.87/32	10.28.64.87 – 10.28.64.87	10.28.64.87
89	10.28.64.88/32	10.28.64.88 – 10.28.64.88	10.28.64.88
90	10.28.64.89/32	10.28.64.89 – 10.28.64.89	10.28.64.89
91	10.28.64.90/32	10.28.64.90 – 10.28.64.90	10.28.64.90
92	10.28.64.91/32	10.28.64.91 – 10.28.64.91	10.28.64.91
93	10.28.64.92/32	10.28.64.92 – 10.28.64.92	10.28.64.92
94	10.28.64.93/32	10.28.64.93 – 10.28.64.93	10.28.64.93
95	10.28.64.94/32	10.28.64.94 – 10.28.64.94	10.28.64.94
96	10.28.64.95/32	10.28.64.95 – 10.28.64.95	10.28.64.95
97	10.28.64.96/32	10.28.64.96 – 10.28.64.96	10.28.64.96
98	10.28.64.97/32	10.28.64.97 – 10.28.64.97	10.28.64.97
99	10.28.64.98/32	10.28.64.98 – 10.28.64.98	10.28.64.98
100	10.28.64.99/32	10.28.64.99 – 10.28.64.99	10.28.64.99
101	10.28.64.100/32	10.28.64.100 – 10.28.64.100	10.28.64.100
102	10.28.64.101/32	10.28.64.101 – 10.28.64.101	10.28.64.101
103	10.28.64.102/32	10.28.64.102 – 10.28.64.102	10.28.64.102
104	10.28.64.103/32	10.28.64.103 – 10.28.64.103	10.28.64.103
105	10.28.64.104/32	10.28.64.104 – 10.28.64.104	10.28.64.104
106	10.28.64.105/32	10.28.64.105 – 10.28.64.105	10.28.64.105
107	10.28.64.106/32	10.28.64.106 – 10.28.64.106	10.28.64.106
108	10.28.64.107/32	10.28.64.107 – 10.28.64.107	10.28.64.107
109	10.28.64.108/32	10.28.64.108 – 10.28.64.108	10.28.64.108
110	10.28.64.109/32	10.28.64.109 – 10.28.64.109	10.28.64.109
111	10.28.64.110/32	10.28.64.110 – 10.28.64.110	10.28.64.110
112	10.28.64.111/32	10.28.64.111 – 10.28.64.111	10.28.64.111
113	10.28.64.112/32	10.28.64.112 – 10.28.64.112	10.28.64.112
114	10.28.64.113/32	10.28.64.113 – 10.28.64.113	10.28.64.113
115	10.28.64.114/32	10.28.64.114 – 10.28.64.114	10.28.64.114
116	10.28.64.115/32	10.28.64.115 – 10.28.64.115	10.28.64.115
117	10.28.64.116/32	10.28.64.116 – 10.28.64.116	10.28.64.116
118	10.28.64.117/32	10.28.64.117 – 10.28.64.117	10.28.64.117
119	10.28.64.118/32	10.28.64.118 – 10.28.64.118	10.28.64.118
120	10.28.64.119/32	10.28.64.119 – 10.28.64.119	10.28.64.119
121	10.28.64.120/32	10.28.64.120 – 10.28.64.120	10.28.64.120
122	10.28.64.121/32	10.28.64.121 – 10.28.64.121	10.28.64.121
123	10.28.64.122/32	10.28.64.122 – 10.28.64.122	10.28.64.122
124	10.28.64.123/32	10.28.64.123 – 10.28.64.123	10.28.64.123
125	10.28.64.124/32	10.28.64.124 – 10.28.64.124	10.28.64.124
126	10.28.64.125/32	10.28.64.125 – 10.28.64.125	10.28.64.125
127	10.28.64.126/32	10.28.64.126 – 10.28.64.126	10.28.64.126
128	10.28.64.127/32	10.28.64.127 – 10.28.64.127	10.28.64.127
129	10.28.64.128/32	10.28.64.128 – 10.28.64.128	10.28.64.128
130	10.28.64.129/32	10.28.64.129 – 10.28.64.129	10.28.64.129
131	10.28.64.130/32	10.28.64.130 – 10.28.64.130	10.28.64.130
132	10.28.64.131/32	10.28.64.131 – 10.28.64.131	10.28.64.131
133	10.28.64.132/32	10.28.64.132 – 10.28.64.132	10.28.64.132
134	10.28.64.133/32	10.28.64.133 – 10.28.64.133	10.28.64.133
135	10.28.64.134/32	10.28.64.134 – 10.28.64.134	10.28.64.134
136	10.28.64.135/32	10.28.64.135 – 10.28.64.135	10.28.64.135
137	10.28.64.136/32	10.28.64.136 – 10.28.64.136	10.28.64.136
138	10.28.64.137/32	10.28.64.137 – 10.28.64.137	10.28.64.137
139	10.28.64.138/32	10.28.64.138 – 10.28.64.138	10.28.64.138
140	10.28.64.139/32	10.28.64.139 – 10.28.64.139	10.28.64.139
141	10.28.64.140/32	10.28.64.140 – 10.28.64.140	10.28.64.140
142	10.28.64.141/32	10.28.64.141 – 10.28.64.141	10.28.64.141
143	10.28.64.142/32	10.28.64.142 – 10.28.64.142	10.28.64.142
144	10.28.64.143/32	10.28.64.143 – 10.28.64.143	10.28.64.143
145	10.28.64.144/32	10.28.64.144 – 10.28.64.144	10.28.64.144
146	10.28.64.145/32	10.28.64.145 – 10.28.64.145	10.28.64.145
147	10.28.64.146/32	10.28.64.146 – 10.28.64.146	10.28.64.146
148	10.28.64.147/32	10.28.64.147 – 10.28.64.147	10.28.64.147
149	10.28.64.148/32	10.28.64.148 – 10.28.64.148	10.28.64.148
150	10.28.64.149/32	10.28.64.149 – 10.28.64.149	10.28.64.149
151	10.28.64.150/32	10.28.64.150 – 10.28.64.150	10.28.64.150
152	10.28.64.151/32	10.28.64.151 – 10.28.64.151	10.28.64.151
153	10.28.64.152/32	10.28.64.152 – 10.28.64.152	10.28.64.152
154	10.28.64.153/32	10.28.64.153 – 10.28.64.153	10.28.64.153
155	10.28.64.154/32	10.28.64.154 – 10.28.64.154	10.28.64.154
156	10.28.64.155/32	10.28.64.155 – 10.28.64.155	10.28.64.155
157	10.28.64.156/32	10.28.64.156 – 10.28.64.156	10.28.64.156
158	10.28.64.157/32	10.28.64.157 – 10.28.64.157	10.28.64.157
159	10.28.64.158/32	10.28.64.158 – 10.28.64.158	10.28.64.158
160	10.28.64.159/32	10.28.64.159 – 10.28.64.159	10.28.64.159
161	10.28.64.160/32	10.28.64.160 – 10.28.64.160	10.28.64.160
162	10.28.64.161/32	10.28.64.161 – 10.28.64.161	10.28.64.161
163	10.28.64.162/32	10.28.64.162 – 10.28.64.162	10.28.64.162
164	10.28.64.163/32	10.28.64.163 – 10.28.64.163	10.28.64.163
165	10.28.64.164/32	10.28.64.164 – 10.28.64.164	10.28.64.164
166	10.28.64.165/32	10.28.64.165 – 10.28.64.165	10.28.64.165
167	10.28.64.166/32	10.28.64.166 – 10.28.64.166	10.28.64.166
168	10.28.64.167/32	10.28.64.167 – 10.28.64.167	10.28.64.167
169	10.28.64.168/32	10.28.64.168 – 10.28.64.168	10.28.64.168
170	10.28.64.169/32	10.28.64.169 – 10.28.64.169	10.28.64.169
171	10.28.64.170/32	10.28.64.170 – 10.28.64.170	10.28.64.170
172	10.28.64.171/32	10.28.64.171 – 10.28.64.171	10.28.64.171
173	10.28.64.172/32	10.28.64.172 – 10.28.64.172	10.28.64.172
174	10.28.64.173/32	10.28.64.173 – 10.28.64.173	10.28.64.173
175	10.28.64.174/32	10.28.64.174 – 10.28.64.174	10.28.64.174
176	10.28.64.175/32	10.28.64.175 – 10.28.64.175	10.28.64.175
177	10.28.64.176/32	10.28.64.176 – 10.28.64.176	10.28.64.176
178	10.28.64.177/32	10.28.64.177 – 10.28.64.177	10.28.64.177
179	10.28.64.178/32	10.28.64.178 – 10.28.64.178	10.28.64.178
180	10.28.64.179/32	10.28.64.179 – 10.28.64.179	10.28.64.179
181	10.28.64.180/32	10.28.64.180 – 10.28.64.180	10.28.64.180
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188	10.28.64.187/32	10.28.64.187 – 10.28.64.187	10.28.64.187
189	10.28.64.188/32	10.28.64.188 – 10.28.64.188	10.28.64.188
190	10.28.64.189/32	10.28.64.189 – 10.28.64.189	10.28.64.189
191	10.28.64.190/32	10.28.64.190 – 10.28.64.190	10.28.64.190
192	10.28.64.191/32	10.28.64.191 – 10.28.64.191	10.28.64.191
193	10.28.64.192/32	10.28.64.192 – 10.28.64.192	10.28.64.192
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197	10.28.64.196/32	10.28.64.196 – 10.28.64.196	10.28.64.196
198	10.28.64.197/32	10.28.64.197 – 10.28.64.197	10.28.64.197
199	10.28.64.198/32	10.28.64.198 – 10.28.64.198	10.28.64.198
200	10.28.64.199/32	10.28.64.199 – 10.28.64.199	10.28.64.199
201	10.28.64.200/32	10.28.64.200 – 10.28.64.200	10.28.64.200
202	10.28.64.201/32	10.28.64.201 – 10.28.64.201	10.28.64.201
203	10.28.64.202/32	10.28.64.202 – 10.28.64.202	10.28.64.202
204	10.28.64.203/32	10.28.64.203 – 10.28.64.203	10.28.64.203
205	10.28.64.204/32	10.28.64.204 – 10.28.64.204	10.28.64.204
206	10.28.64.205/32	10.28.64.205 – 10.28.64.205	10.28.64.205
207	10.28.64.206/32	10.28.64.206 – 10.28.64.206	10.28.64.206
208	10.28.64.207/32	10.28.64.207 – 10.28.64.207	10.28.64.207
209	10.28.64.208/32	10.28.64.208 – 10.28.64.208	10.28.64.208
210	10.28.64.209/32	10.28.64.209 – 10.28.64.209	10.28.64.209
211	10.28.64.210/32	10.28.64.210 – 10.28.64.210	10.28.64.210
212	10.28.64.211/32	10.28.64.211 – 10.28.64.211	10.28.64.211
213	10.28.64.212/32	10.28.64.212 – 10.28.64.212	10.28.64.212
214	10.28.64.213/32	10.28.64.213 – 10.28.64.213	10.28.64.213
215	10.28.64.214/32	10.28.64.214 – 10.28.64.214	10.28.64.214
216	10.28.64.215/32	10.28.64.215 – 10.28.64.215	10.28.64.215
217	10.28.64.216/32	10.28.64.216 – 10.28.64.216	10.28.64.216
218	10.28.64.217/32	10.28.64.217 – 10.28.64.217	10.28.64.217
219	10.28.64.218/32	10.28.64.218 – 10.28.64.218	10.28.64.218
220	10.28.64.219/32	10.28.64.219 – 10.28.64.219	10.28.64.219
221	10.28.64.220/32	10.28.64.220 – 10.28.64.220	10.28.64.220
222	10.28.64.221/32	10.28.64.221 – 10.28.64.221	10.28.64.221
223	10.28.64.222/32	10.28.64.222 – 10.28.64.222	10.28.64.222
224	10.28.64.223/32	10.28.64.223 – 10.28.64.223	10.28.64.223
225	10.28.64.224/32	10.28.64.224 – 10.28.64.224	10.28.64.224
226	10.28.64.225/32	10.28.64.225 – 10.28.64.225	10.28.64.225
227	10.28.64.226/32	10.28.64.226 – 10.28.64.226	10.28.64.226
228	10.28.64.227/32	10.28.64.227 – 10.28.64.227	10.28.64.227
229	10.28.64.228/32	10.28.64.228 – 10.28.64.228	10.28.64.228
230	10.28.64.229/32	10.28.64.229 – 10.28.64.229	10.28.64.229
231	10.28.64.230/32	10.28.64.230 – 10.28.64.230	10.28.64.230
232	10.28.64.231/32	10.28.64.231 – 10.28.64.231	10.28.64.231
233	10.28.64.232/32	10.28.64.232 – 10.28.64.232	10.28.64.232
234	10.28.64.233/32	10.28.64.233 – 10.28.64.233	10.28.64.233
235	10.28.64.234/32	10.28.64.234 – 10.28.64.234	10.28.64.234
236	10.28.64.235/32	10.28.64.235 – 10.28.64.235	10.28.64.235
237	10.28.64.236/32	10.28.64.236 – 10.28.64.236	10.28.64.236
238	10.28.64.237/32	10.28.64.237 – 10.28.64.237	10.28.64.237
239	10.28.64.238/32	10.28.64.238 – 10.28.64.238	10.28.64.238
240	10.28.64.239/32	10.28.64.239 – 10.28.64.239	10.28.64.239
241	10.28.64.240/32	10.28.64.240 – 10.28.64.240	10.28.64.240
242	10.28.64.241/32	10.28.64.241 – 10.28.64.241	10.28.64.241
243	10.28.64.242/32	10.28.64.242 – 10.28.64.242	10.28.64.242
244	10.28.64.243/32	10.28.64.243 – 10.28.64.243	10.28.64.243
245	10.28.64.244/32	10.28.64.244 – 10.28.64.244	10.28.64.244
246	10.28.64.245/32	10.28.64.245 – 10.28.64.245	10.28.64.245
247	10.28.64.246/32	10.28.64.246 – 10.28.64.246	10.28.64.246
248	10.28.64.247/32	10.28.64.247 – 10.28.64.247	10.28.64.247
249	10.28.64.248/32	10.28.64.248 – 10.28.64.248	10.28.64.248
250	10.28.64.249/32	10.28.64.249 – 10.28.64.249	10.28.64.249
251	10.28.64.250/32	10.28.64.250 – 10.28.64.250	10.28.64.250
252	10.28.64.251/32	10.28.64.251 – 10.28.64.251	10.28.64.251
253	10.28.64.252/32	10.28.64.252 – 10.28.64.252	10.28.64.252
254	10.28.64.253/32	10.28.64.253 – 10.28.64.253	10.28.64.253
255	10.28.64.254/32	10.28.64.254 – 10.28.64.254	10.28.64.254
256	10.28.64.255/32	10.28.64.255 – 10.28.64.255	10.28.64.255

showing 256 of 8,192

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →