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)10.0.61.0/24

network10.0.61.0/24

broadcast10.0.61.255

first host10.0.61.1

last host10.0.61.254

subnet mask255.255.255.0

wildcard0.0.0.255

addresses256

usable hosts254

classA

ipcalc 10.0.61.0/24

address00001010.00000000.00111101.00000000

subnet mask11111111.11111111.11111111.00000000

network00001010.00000000.00111101.00000000

broadcast00001010.00000000.00111101.11111111

green = network part, grey = host part

hex0x0a003d00

decimal167787776

reverse dns0.61.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:3d00

/24 split into /32 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.61.0/32	10.0.61.0 – 10.0.61.0	10.0.61.0
2	10.0.61.1/32	10.0.61.1 – 10.0.61.1	10.0.61.1
3	10.0.61.2/32	10.0.61.2 – 10.0.61.2	10.0.61.2
4	10.0.61.3/32	10.0.61.3 – 10.0.61.3	10.0.61.3
5	10.0.61.4/32	10.0.61.4 – 10.0.61.4	10.0.61.4
6	10.0.61.5/32	10.0.61.5 – 10.0.61.5	10.0.61.5
7	10.0.61.6/32	10.0.61.6 – 10.0.61.6	10.0.61.6
8	10.0.61.7/32	10.0.61.7 – 10.0.61.7	10.0.61.7
9	10.0.61.8/32	10.0.61.8 – 10.0.61.8	10.0.61.8
10	10.0.61.9/32	10.0.61.9 – 10.0.61.9	10.0.61.9
11	10.0.61.10/32	10.0.61.10 – 10.0.61.10	10.0.61.10
12	10.0.61.11/32	10.0.61.11 – 10.0.61.11	10.0.61.11
13	10.0.61.12/32	10.0.61.12 – 10.0.61.12	10.0.61.12
14	10.0.61.13/32	10.0.61.13 – 10.0.61.13	10.0.61.13
15	10.0.61.14/32	10.0.61.14 – 10.0.61.14	10.0.61.14
16	10.0.61.15/32	10.0.61.15 – 10.0.61.15	10.0.61.15
17	10.0.61.16/32	10.0.61.16 – 10.0.61.16	10.0.61.16
18	10.0.61.17/32	10.0.61.17 – 10.0.61.17	10.0.61.17
19	10.0.61.18/32	10.0.61.18 – 10.0.61.18	10.0.61.18
20	10.0.61.19/32	10.0.61.19 – 10.0.61.19	10.0.61.19
21	10.0.61.20/32	10.0.61.20 – 10.0.61.20	10.0.61.20
22	10.0.61.21/32	10.0.61.21 – 10.0.61.21	10.0.61.21
23	10.0.61.22/32	10.0.61.22 – 10.0.61.22	10.0.61.22
24	10.0.61.23/32	10.0.61.23 – 10.0.61.23	10.0.61.23
25	10.0.61.24/32	10.0.61.24 – 10.0.61.24	10.0.61.24
26	10.0.61.25/32	10.0.61.25 – 10.0.61.25	10.0.61.25
27	10.0.61.26/32	10.0.61.26 – 10.0.61.26	10.0.61.26
28	10.0.61.27/32	10.0.61.27 – 10.0.61.27	10.0.61.27
29	10.0.61.28/32	10.0.61.28 – 10.0.61.28	10.0.61.28
30	10.0.61.29/32	10.0.61.29 – 10.0.61.29	10.0.61.29
31	10.0.61.30/32	10.0.61.30 – 10.0.61.30	10.0.61.30
32	10.0.61.31/32	10.0.61.31 – 10.0.61.31	10.0.61.31
33	10.0.61.32/32	10.0.61.32 – 10.0.61.32	10.0.61.32
34	10.0.61.33/32	10.0.61.33 – 10.0.61.33	10.0.61.33
35	10.0.61.34/32	10.0.61.34 – 10.0.61.34	10.0.61.34
36	10.0.61.35/32	10.0.61.35 – 10.0.61.35	10.0.61.35
37	10.0.61.36/32	10.0.61.36 – 10.0.61.36	10.0.61.36
38	10.0.61.37/32	10.0.61.37 – 10.0.61.37	10.0.61.37
39	10.0.61.38/32	10.0.61.38 – 10.0.61.38	10.0.61.38
40	10.0.61.39/32	10.0.61.39 – 10.0.61.39	10.0.61.39
41	10.0.61.40/32	10.0.61.40 – 10.0.61.40	10.0.61.40
42	10.0.61.41/32	10.0.61.41 – 10.0.61.41	10.0.61.41
43	10.0.61.42/32	10.0.61.42 – 10.0.61.42	10.0.61.42
44	10.0.61.43/32	10.0.61.43 – 10.0.61.43	10.0.61.43
45	10.0.61.44/32	10.0.61.44 – 10.0.61.44	10.0.61.44
46	10.0.61.45/32	10.0.61.45 – 10.0.61.45	10.0.61.45
47	10.0.61.46/32	10.0.61.46 – 10.0.61.46	10.0.61.46
48	10.0.61.47/32	10.0.61.47 – 10.0.61.47	10.0.61.47
49	10.0.61.48/32	10.0.61.48 – 10.0.61.48	10.0.61.48
50	10.0.61.49/32	10.0.61.49 – 10.0.61.49	10.0.61.49
51	10.0.61.50/32	10.0.61.50 – 10.0.61.50	10.0.61.50
52	10.0.61.51/32	10.0.61.51 – 10.0.61.51	10.0.61.51
53	10.0.61.52/32	10.0.61.52 – 10.0.61.52	10.0.61.52
54	10.0.61.53/32	10.0.61.53 – 10.0.61.53	10.0.61.53
55	10.0.61.54/32	10.0.61.54 – 10.0.61.54	10.0.61.54
56	10.0.61.55/32	10.0.61.55 – 10.0.61.55	10.0.61.55
57	10.0.61.56/32	10.0.61.56 – 10.0.61.56	10.0.61.56
58	10.0.61.57/32	10.0.61.57 – 10.0.61.57	10.0.61.57
59	10.0.61.58/32	10.0.61.58 – 10.0.61.58	10.0.61.58
60	10.0.61.59/32	10.0.61.59 – 10.0.61.59	10.0.61.59
61	10.0.61.60/32	10.0.61.60 – 10.0.61.60	10.0.61.60
62	10.0.61.61/32	10.0.61.61 – 10.0.61.61	10.0.61.61
63	10.0.61.62/32	10.0.61.62 – 10.0.61.62	10.0.61.62
64	10.0.61.63/32	10.0.61.63 – 10.0.61.63	10.0.61.63
65	10.0.61.64/32	10.0.61.64 – 10.0.61.64	10.0.61.64
66	10.0.61.65/32	10.0.61.65 – 10.0.61.65	10.0.61.65
67	10.0.61.66/32	10.0.61.66 – 10.0.61.66	10.0.61.66
68	10.0.61.67/32	10.0.61.67 – 10.0.61.67	10.0.61.67
69	10.0.61.68/32	10.0.61.68 – 10.0.61.68	10.0.61.68
70	10.0.61.69/32	10.0.61.69 – 10.0.61.69	10.0.61.69
71	10.0.61.70/32	10.0.61.70 – 10.0.61.70	10.0.61.70
72	10.0.61.71/32	10.0.61.71 – 10.0.61.71	10.0.61.71
73	10.0.61.72/32	10.0.61.72 – 10.0.61.72	10.0.61.72
74	10.0.61.73/32	10.0.61.73 – 10.0.61.73	10.0.61.73
75	10.0.61.74/32	10.0.61.74 – 10.0.61.74	10.0.61.74
76	10.0.61.75/32	10.0.61.75 – 10.0.61.75	10.0.61.75
77	10.0.61.76/32	10.0.61.76 – 10.0.61.76	10.0.61.76
78	10.0.61.77/32	10.0.61.77 – 10.0.61.77	10.0.61.77
79	10.0.61.78/32	10.0.61.78 – 10.0.61.78	10.0.61.78
80	10.0.61.79/32	10.0.61.79 – 10.0.61.79	10.0.61.79
81	10.0.61.80/32	10.0.61.80 – 10.0.61.80	10.0.61.80
82	10.0.61.81/32	10.0.61.81 – 10.0.61.81	10.0.61.81
83	10.0.61.82/32	10.0.61.82 – 10.0.61.82	10.0.61.82
84	10.0.61.83/32	10.0.61.83 – 10.0.61.83	10.0.61.83
85	10.0.61.84/32	10.0.61.84 – 10.0.61.84	10.0.61.84
86	10.0.61.85/32	10.0.61.85 – 10.0.61.85	10.0.61.85
87	10.0.61.86/32	10.0.61.86 – 10.0.61.86	10.0.61.86
88	10.0.61.87/32	10.0.61.87 – 10.0.61.87	10.0.61.87
89	10.0.61.88/32	10.0.61.88 – 10.0.61.88	10.0.61.88
90	10.0.61.89/32	10.0.61.89 – 10.0.61.89	10.0.61.89
91	10.0.61.90/32	10.0.61.90 – 10.0.61.90	10.0.61.90
92	10.0.61.91/32	10.0.61.91 – 10.0.61.91	10.0.61.91
93	10.0.61.92/32	10.0.61.92 – 10.0.61.92	10.0.61.92
94	10.0.61.93/32	10.0.61.93 – 10.0.61.93	10.0.61.93
95	10.0.61.94/32	10.0.61.94 – 10.0.61.94	10.0.61.94
96	10.0.61.95/32	10.0.61.95 – 10.0.61.95	10.0.61.95
97	10.0.61.96/32	10.0.61.96 – 10.0.61.96	10.0.61.96
98	10.0.61.97/32	10.0.61.97 – 10.0.61.97	10.0.61.97
99	10.0.61.98/32	10.0.61.98 – 10.0.61.98	10.0.61.98
100	10.0.61.99/32	10.0.61.99 – 10.0.61.99	10.0.61.99
101	10.0.61.100/32	10.0.61.100 – 10.0.61.100	10.0.61.100
102	10.0.61.101/32	10.0.61.101 – 10.0.61.101	10.0.61.101
103	10.0.61.102/32	10.0.61.102 – 10.0.61.102	10.0.61.102
104	10.0.61.103/32	10.0.61.103 – 10.0.61.103	10.0.61.103
105	10.0.61.104/32	10.0.61.104 – 10.0.61.104	10.0.61.104
106	10.0.61.105/32	10.0.61.105 – 10.0.61.105	10.0.61.105
107	10.0.61.106/32	10.0.61.106 – 10.0.61.106	10.0.61.106
108	10.0.61.107/32	10.0.61.107 – 10.0.61.107	10.0.61.107
109	10.0.61.108/32	10.0.61.108 – 10.0.61.108	10.0.61.108
110	10.0.61.109/32	10.0.61.109 – 10.0.61.109	10.0.61.109
111	10.0.61.110/32	10.0.61.110 – 10.0.61.110	10.0.61.110
112	10.0.61.111/32	10.0.61.111 – 10.0.61.111	10.0.61.111
113	10.0.61.112/32	10.0.61.112 – 10.0.61.112	10.0.61.112
114	10.0.61.113/32	10.0.61.113 – 10.0.61.113	10.0.61.113
115	10.0.61.114/32	10.0.61.114 – 10.0.61.114	10.0.61.114
116	10.0.61.115/32	10.0.61.115 – 10.0.61.115	10.0.61.115
117	10.0.61.116/32	10.0.61.116 – 10.0.61.116	10.0.61.116
118	10.0.61.117/32	10.0.61.117 – 10.0.61.117	10.0.61.117
119	10.0.61.118/32	10.0.61.118 – 10.0.61.118	10.0.61.118
120	10.0.61.119/32	10.0.61.119 – 10.0.61.119	10.0.61.119
121	10.0.61.120/32	10.0.61.120 – 10.0.61.120	10.0.61.120
122	10.0.61.121/32	10.0.61.121 – 10.0.61.121	10.0.61.121
123	10.0.61.122/32	10.0.61.122 – 10.0.61.122	10.0.61.122
124	10.0.61.123/32	10.0.61.123 – 10.0.61.123	10.0.61.123
125	10.0.61.124/32	10.0.61.124 – 10.0.61.124	10.0.61.124
126	10.0.61.125/32	10.0.61.125 – 10.0.61.125	10.0.61.125
127	10.0.61.126/32	10.0.61.126 – 10.0.61.126	10.0.61.126
128	10.0.61.127/32	10.0.61.127 – 10.0.61.127	10.0.61.127
129	10.0.61.128/32	10.0.61.128 – 10.0.61.128	10.0.61.128
130	10.0.61.129/32	10.0.61.129 – 10.0.61.129	10.0.61.129
131	10.0.61.130/32	10.0.61.130 – 10.0.61.130	10.0.61.130
132	10.0.61.131/32	10.0.61.131 – 10.0.61.131	10.0.61.131
133	10.0.61.132/32	10.0.61.132 – 10.0.61.132	10.0.61.132
134	10.0.61.133/32	10.0.61.133 – 10.0.61.133	10.0.61.133
135	10.0.61.134/32	10.0.61.134 – 10.0.61.134	10.0.61.134
136	10.0.61.135/32	10.0.61.135 – 10.0.61.135	10.0.61.135
137	10.0.61.136/32	10.0.61.136 – 10.0.61.136	10.0.61.136
138	10.0.61.137/32	10.0.61.137 – 10.0.61.137	10.0.61.137
139	10.0.61.138/32	10.0.61.138 – 10.0.61.138	10.0.61.138
140	10.0.61.139/32	10.0.61.139 – 10.0.61.139	10.0.61.139
141	10.0.61.140/32	10.0.61.140 – 10.0.61.140	10.0.61.140
142	10.0.61.141/32	10.0.61.141 – 10.0.61.141	10.0.61.141
143	10.0.61.142/32	10.0.61.142 – 10.0.61.142	10.0.61.142
144	10.0.61.143/32	10.0.61.143 – 10.0.61.143	10.0.61.143
145	10.0.61.144/32	10.0.61.144 – 10.0.61.144	10.0.61.144
146	10.0.61.145/32	10.0.61.145 – 10.0.61.145	10.0.61.145
147	10.0.61.146/32	10.0.61.146 – 10.0.61.146	10.0.61.146
148	10.0.61.147/32	10.0.61.147 – 10.0.61.147	10.0.61.147
149	10.0.61.148/32	10.0.61.148 – 10.0.61.148	10.0.61.148
150	10.0.61.149/32	10.0.61.149 – 10.0.61.149	10.0.61.149
151	10.0.61.150/32	10.0.61.150 – 10.0.61.150	10.0.61.150
152	10.0.61.151/32	10.0.61.151 – 10.0.61.151	10.0.61.151
153	10.0.61.152/32	10.0.61.152 – 10.0.61.152	10.0.61.152
154	10.0.61.153/32	10.0.61.153 – 10.0.61.153	10.0.61.153
155	10.0.61.154/32	10.0.61.154 – 10.0.61.154	10.0.61.154
156	10.0.61.155/32	10.0.61.155 – 10.0.61.155	10.0.61.155
157	10.0.61.156/32	10.0.61.156 – 10.0.61.156	10.0.61.156
158	10.0.61.157/32	10.0.61.157 – 10.0.61.157	10.0.61.157
159	10.0.61.158/32	10.0.61.158 – 10.0.61.158	10.0.61.158
160	10.0.61.159/32	10.0.61.159 – 10.0.61.159	10.0.61.159
161	10.0.61.160/32	10.0.61.160 – 10.0.61.160	10.0.61.160
162	10.0.61.161/32	10.0.61.161 – 10.0.61.161	10.0.61.161
163	10.0.61.162/32	10.0.61.162 – 10.0.61.162	10.0.61.162
164	10.0.61.163/32	10.0.61.163 – 10.0.61.163	10.0.61.163
165	10.0.61.164/32	10.0.61.164 – 10.0.61.164	10.0.61.164
166	10.0.61.165/32	10.0.61.165 – 10.0.61.165	10.0.61.165
167	10.0.61.166/32	10.0.61.166 – 10.0.61.166	10.0.61.166
168	10.0.61.167/32	10.0.61.167 – 10.0.61.167	10.0.61.167
169	10.0.61.168/32	10.0.61.168 – 10.0.61.168	10.0.61.168
170	10.0.61.169/32	10.0.61.169 – 10.0.61.169	10.0.61.169
171	10.0.61.170/32	10.0.61.170 – 10.0.61.170	10.0.61.170
172	10.0.61.171/32	10.0.61.171 – 10.0.61.171	10.0.61.171
173	10.0.61.172/32	10.0.61.172 – 10.0.61.172	10.0.61.172
174	10.0.61.173/32	10.0.61.173 – 10.0.61.173	10.0.61.173
175	10.0.61.174/32	10.0.61.174 – 10.0.61.174	10.0.61.174
176	10.0.61.175/32	10.0.61.175 – 10.0.61.175	10.0.61.175
177	10.0.61.176/32	10.0.61.176 – 10.0.61.176	10.0.61.176
178	10.0.61.177/32	10.0.61.177 – 10.0.61.177	10.0.61.177
179	10.0.61.178/32	10.0.61.178 – 10.0.61.178	10.0.61.178
180	10.0.61.179/32	10.0.61.179 – 10.0.61.179	10.0.61.179
181	10.0.61.180/32	10.0.61.180 – 10.0.61.180	10.0.61.180
182	10.0.61.181/32	10.0.61.181 – 10.0.61.181	10.0.61.181
183	10.0.61.182/32	10.0.61.182 – 10.0.61.182	10.0.61.182
184	10.0.61.183/32	10.0.61.183 – 10.0.61.183	10.0.61.183
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187	10.0.61.186/32	10.0.61.186 – 10.0.61.186	10.0.61.186
188	10.0.61.187/32	10.0.61.187 – 10.0.61.187	10.0.61.187
189	10.0.61.188/32	10.0.61.188 – 10.0.61.188	10.0.61.188
190	10.0.61.189/32	10.0.61.189 – 10.0.61.189	10.0.61.189
191	10.0.61.190/32	10.0.61.190 – 10.0.61.190	10.0.61.190
192	10.0.61.191/32	10.0.61.191 – 10.0.61.191	10.0.61.191
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197	10.0.61.196/32	10.0.61.196 – 10.0.61.196	10.0.61.196
198	10.0.61.197/32	10.0.61.197 – 10.0.61.197	10.0.61.197
199	10.0.61.198/32	10.0.61.198 – 10.0.61.198	10.0.61.198
200	10.0.61.199/32	10.0.61.199 – 10.0.61.199	10.0.61.199
201	10.0.61.200/32	10.0.61.200 – 10.0.61.200	10.0.61.200
202	10.0.61.201/32	10.0.61.201 – 10.0.61.201	10.0.61.201
203	10.0.61.202/32	10.0.61.202 – 10.0.61.202	10.0.61.202
204	10.0.61.203/32	10.0.61.203 – 10.0.61.203	10.0.61.203
205	10.0.61.204/32	10.0.61.204 – 10.0.61.204	10.0.61.204
206	10.0.61.205/32	10.0.61.205 – 10.0.61.205	10.0.61.205
207	10.0.61.206/32	10.0.61.206 – 10.0.61.206	10.0.61.206
208	10.0.61.207/32	10.0.61.207 – 10.0.61.207	10.0.61.207
209	10.0.61.208/32	10.0.61.208 – 10.0.61.208	10.0.61.208
210	10.0.61.209/32	10.0.61.209 – 10.0.61.209	10.0.61.209
211	10.0.61.210/32	10.0.61.210 – 10.0.61.210	10.0.61.210
212	10.0.61.211/32	10.0.61.211 – 10.0.61.211	10.0.61.211
213	10.0.61.212/32	10.0.61.212 – 10.0.61.212	10.0.61.212
214	10.0.61.213/32	10.0.61.213 – 10.0.61.213	10.0.61.213
215	10.0.61.214/32	10.0.61.214 – 10.0.61.214	10.0.61.214
216	10.0.61.215/32	10.0.61.215 – 10.0.61.215	10.0.61.215
217	10.0.61.216/32	10.0.61.216 – 10.0.61.216	10.0.61.216
218	10.0.61.217/32	10.0.61.217 – 10.0.61.217	10.0.61.217
219	10.0.61.218/32	10.0.61.218 – 10.0.61.218	10.0.61.218
220	10.0.61.219/32	10.0.61.219 – 10.0.61.219	10.0.61.219
221	10.0.61.220/32	10.0.61.220 – 10.0.61.220	10.0.61.220
222	10.0.61.221/32	10.0.61.221 – 10.0.61.221	10.0.61.221
223	10.0.61.222/32	10.0.61.222 – 10.0.61.222	10.0.61.222
224	10.0.61.223/32	10.0.61.223 – 10.0.61.223	10.0.61.223
225	10.0.61.224/32	10.0.61.224 – 10.0.61.224	10.0.61.224
226	10.0.61.225/32	10.0.61.225 – 10.0.61.225	10.0.61.225
227	10.0.61.226/32	10.0.61.226 – 10.0.61.226	10.0.61.226
228	10.0.61.227/32	10.0.61.227 – 10.0.61.227	10.0.61.227
229	10.0.61.228/32	10.0.61.228 – 10.0.61.228	10.0.61.228
230	10.0.61.229/32	10.0.61.229 – 10.0.61.229	10.0.61.229
231	10.0.61.230/32	10.0.61.230 – 10.0.61.230	10.0.61.230
232	10.0.61.231/32	10.0.61.231 – 10.0.61.231	10.0.61.231
233	10.0.61.232/32	10.0.61.232 – 10.0.61.232	10.0.61.232
234	10.0.61.233/32	10.0.61.233 – 10.0.61.233	10.0.61.233
235	10.0.61.234/32	10.0.61.234 – 10.0.61.234	10.0.61.234
236	10.0.61.235/32	10.0.61.235 – 10.0.61.235	10.0.61.235
237	10.0.61.236/32	10.0.61.236 – 10.0.61.236	10.0.61.236
238	10.0.61.237/32	10.0.61.237 – 10.0.61.237	10.0.61.237
239	10.0.61.238/32	10.0.61.238 – 10.0.61.238	10.0.61.238
240	10.0.61.239/32	10.0.61.239 – 10.0.61.239	10.0.61.239
241	10.0.61.240/32	10.0.61.240 – 10.0.61.240	10.0.61.240
242	10.0.61.241/32	10.0.61.241 – 10.0.61.241	10.0.61.241
243	10.0.61.242/32	10.0.61.242 – 10.0.61.242	10.0.61.242
244	10.0.61.243/32	10.0.61.243 – 10.0.61.243	10.0.61.243
245	10.0.61.244/32	10.0.61.244 – 10.0.61.244	10.0.61.244
246	10.0.61.245/32	10.0.61.245 – 10.0.61.245	10.0.61.245
247	10.0.61.246/32	10.0.61.246 – 10.0.61.246	10.0.61.246
248	10.0.61.247/32	10.0.61.247 – 10.0.61.247	10.0.61.247
249	10.0.61.248/32	10.0.61.248 – 10.0.61.248	10.0.61.248
250	10.0.61.249/32	10.0.61.249 – 10.0.61.249	10.0.61.249
251	10.0.61.250/32	10.0.61.250 – 10.0.61.250	10.0.61.250
252	10.0.61.251/32	10.0.61.251 – 10.0.61.251	10.0.61.251
253	10.0.61.252/32	10.0.61.252 – 10.0.61.252	10.0.61.252
254	10.0.61.253/32	10.0.61.253 – 10.0.61.253	10.0.61.253
255	10.0.61.254/32	10.0.61.254 – 10.0.61.254	10.0.61.254
256	10.0.61.255/32	10.0.61.255 – 10.0.61.255	10.0.61.255

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 →