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)10.149.46.0/23

network10.149.46.0/23

broadcast10.149.47.255

first host10.149.46.1

last host10.149.47.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.149.46.0/23

address00001010.10010101.00101110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.10010101.00101110.00000000

broadcast00001010.10010101.00101111.11111111

green = network part, grey = host part

hex0x0a952e00

decimal177548800

reverse dns0.46.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:2e00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.149.46.0/31	10.149.46.0 – 10.149.46.1	10.149.46.1
2	10.149.46.2/31	10.149.46.2 – 10.149.46.3	10.149.46.3
3	10.149.46.4/31	10.149.46.4 – 10.149.46.5	10.149.46.5
4	10.149.46.6/31	10.149.46.6 – 10.149.46.7	10.149.46.7
5	10.149.46.8/31	10.149.46.8 – 10.149.46.9	10.149.46.9
6	10.149.46.10/31	10.149.46.10 – 10.149.46.11	10.149.46.11
7	10.149.46.12/31	10.149.46.12 – 10.149.46.13	10.149.46.13
8	10.149.46.14/31	10.149.46.14 – 10.149.46.15	10.149.46.15
9	10.149.46.16/31	10.149.46.16 – 10.149.46.17	10.149.46.17
10	10.149.46.18/31	10.149.46.18 – 10.149.46.19	10.149.46.19
11	10.149.46.20/31	10.149.46.20 – 10.149.46.21	10.149.46.21
12	10.149.46.22/31	10.149.46.22 – 10.149.46.23	10.149.46.23
13	10.149.46.24/31	10.149.46.24 – 10.149.46.25	10.149.46.25
14	10.149.46.26/31	10.149.46.26 – 10.149.46.27	10.149.46.27
15	10.149.46.28/31	10.149.46.28 – 10.149.46.29	10.149.46.29
16	10.149.46.30/31	10.149.46.30 – 10.149.46.31	10.149.46.31
17	10.149.46.32/31	10.149.46.32 – 10.149.46.33	10.149.46.33
18	10.149.46.34/31	10.149.46.34 – 10.149.46.35	10.149.46.35
19	10.149.46.36/31	10.149.46.36 – 10.149.46.37	10.149.46.37
20	10.149.46.38/31	10.149.46.38 – 10.149.46.39	10.149.46.39
21	10.149.46.40/31	10.149.46.40 – 10.149.46.41	10.149.46.41
22	10.149.46.42/31	10.149.46.42 – 10.149.46.43	10.149.46.43
23	10.149.46.44/31	10.149.46.44 – 10.149.46.45	10.149.46.45
24	10.149.46.46/31	10.149.46.46 – 10.149.46.47	10.149.46.47
25	10.149.46.48/31	10.149.46.48 – 10.149.46.49	10.149.46.49
26	10.149.46.50/31	10.149.46.50 – 10.149.46.51	10.149.46.51
27	10.149.46.52/31	10.149.46.52 – 10.149.46.53	10.149.46.53
28	10.149.46.54/31	10.149.46.54 – 10.149.46.55	10.149.46.55
29	10.149.46.56/31	10.149.46.56 – 10.149.46.57	10.149.46.57
30	10.149.46.58/31	10.149.46.58 – 10.149.46.59	10.149.46.59
31	10.149.46.60/31	10.149.46.60 – 10.149.46.61	10.149.46.61
32	10.149.46.62/31	10.149.46.62 – 10.149.46.63	10.149.46.63
33	10.149.46.64/31	10.149.46.64 – 10.149.46.65	10.149.46.65
34	10.149.46.66/31	10.149.46.66 – 10.149.46.67	10.149.46.67
35	10.149.46.68/31	10.149.46.68 – 10.149.46.69	10.149.46.69
36	10.149.46.70/31	10.149.46.70 – 10.149.46.71	10.149.46.71
37	10.149.46.72/31	10.149.46.72 – 10.149.46.73	10.149.46.73
38	10.149.46.74/31	10.149.46.74 – 10.149.46.75	10.149.46.75
39	10.149.46.76/31	10.149.46.76 – 10.149.46.77	10.149.46.77
40	10.149.46.78/31	10.149.46.78 – 10.149.46.79	10.149.46.79
41	10.149.46.80/31	10.149.46.80 – 10.149.46.81	10.149.46.81
42	10.149.46.82/31	10.149.46.82 – 10.149.46.83	10.149.46.83
43	10.149.46.84/31	10.149.46.84 – 10.149.46.85	10.149.46.85
44	10.149.46.86/31	10.149.46.86 – 10.149.46.87	10.149.46.87
45	10.149.46.88/31	10.149.46.88 – 10.149.46.89	10.149.46.89
46	10.149.46.90/31	10.149.46.90 – 10.149.46.91	10.149.46.91
47	10.149.46.92/31	10.149.46.92 – 10.149.46.93	10.149.46.93
48	10.149.46.94/31	10.149.46.94 – 10.149.46.95	10.149.46.95
49	10.149.46.96/31	10.149.46.96 – 10.149.46.97	10.149.46.97
50	10.149.46.98/31	10.149.46.98 – 10.149.46.99	10.149.46.99
51	10.149.46.100/31	10.149.46.100 – 10.149.46.101	10.149.46.101
52	10.149.46.102/31	10.149.46.102 – 10.149.46.103	10.149.46.103
53	10.149.46.104/31	10.149.46.104 – 10.149.46.105	10.149.46.105
54	10.149.46.106/31	10.149.46.106 – 10.149.46.107	10.149.46.107
55	10.149.46.108/31	10.149.46.108 – 10.149.46.109	10.149.46.109
56	10.149.46.110/31	10.149.46.110 – 10.149.46.111	10.149.46.111
57	10.149.46.112/31	10.149.46.112 – 10.149.46.113	10.149.46.113
58	10.149.46.114/31	10.149.46.114 – 10.149.46.115	10.149.46.115
59	10.149.46.116/31	10.149.46.116 – 10.149.46.117	10.149.46.117
60	10.149.46.118/31	10.149.46.118 – 10.149.46.119	10.149.46.119
61	10.149.46.120/31	10.149.46.120 – 10.149.46.121	10.149.46.121
62	10.149.46.122/31	10.149.46.122 – 10.149.46.123	10.149.46.123
63	10.149.46.124/31	10.149.46.124 – 10.149.46.125	10.149.46.125
64	10.149.46.126/31	10.149.46.126 – 10.149.46.127	10.149.46.127
65	10.149.46.128/31	10.149.46.128 – 10.149.46.129	10.149.46.129
66	10.149.46.130/31	10.149.46.130 – 10.149.46.131	10.149.46.131
67	10.149.46.132/31	10.149.46.132 – 10.149.46.133	10.149.46.133
68	10.149.46.134/31	10.149.46.134 – 10.149.46.135	10.149.46.135
69	10.149.46.136/31	10.149.46.136 – 10.149.46.137	10.149.46.137
70	10.149.46.138/31	10.149.46.138 – 10.149.46.139	10.149.46.139
71	10.149.46.140/31	10.149.46.140 – 10.149.46.141	10.149.46.141
72	10.149.46.142/31	10.149.46.142 – 10.149.46.143	10.149.46.143
73	10.149.46.144/31	10.149.46.144 – 10.149.46.145	10.149.46.145
74	10.149.46.146/31	10.149.46.146 – 10.149.46.147	10.149.46.147
75	10.149.46.148/31	10.149.46.148 – 10.149.46.149	10.149.46.149
76	10.149.46.150/31	10.149.46.150 – 10.149.46.151	10.149.46.151
77	10.149.46.152/31	10.149.46.152 – 10.149.46.153	10.149.46.153
78	10.149.46.154/31	10.149.46.154 – 10.149.46.155	10.149.46.155
79	10.149.46.156/31	10.149.46.156 – 10.149.46.157	10.149.46.157
80	10.149.46.158/31	10.149.46.158 – 10.149.46.159	10.149.46.159
81	10.149.46.160/31	10.149.46.160 – 10.149.46.161	10.149.46.161
82	10.149.46.162/31	10.149.46.162 – 10.149.46.163	10.149.46.163
83	10.149.46.164/31	10.149.46.164 – 10.149.46.165	10.149.46.165
84	10.149.46.166/31	10.149.46.166 – 10.149.46.167	10.149.46.167
85	10.149.46.168/31	10.149.46.168 – 10.149.46.169	10.149.46.169
86	10.149.46.170/31	10.149.46.170 – 10.149.46.171	10.149.46.171
87	10.149.46.172/31	10.149.46.172 – 10.149.46.173	10.149.46.173
88	10.149.46.174/31	10.149.46.174 – 10.149.46.175	10.149.46.175
89	10.149.46.176/31	10.149.46.176 – 10.149.46.177	10.149.46.177
90	10.149.46.178/31	10.149.46.178 – 10.149.46.179	10.149.46.179
91	10.149.46.180/31	10.149.46.180 – 10.149.46.181	10.149.46.181
92	10.149.46.182/31	10.149.46.182 – 10.149.46.183	10.149.46.183
93	10.149.46.184/31	10.149.46.184 – 10.149.46.185	10.149.46.185
94	10.149.46.186/31	10.149.46.186 – 10.149.46.187	10.149.46.187
95	10.149.46.188/31	10.149.46.188 – 10.149.46.189	10.149.46.189
96	10.149.46.190/31	10.149.46.190 – 10.149.46.191	10.149.46.191
97	10.149.46.192/31	10.149.46.192 – 10.149.46.193	10.149.46.193
98	10.149.46.194/31	10.149.46.194 – 10.149.46.195	10.149.46.195
99	10.149.46.196/31	10.149.46.196 – 10.149.46.197	10.149.46.197
100	10.149.46.198/31	10.149.46.198 – 10.149.46.199	10.149.46.199
101	10.149.46.200/31	10.149.46.200 – 10.149.46.201	10.149.46.201
102	10.149.46.202/31	10.149.46.202 – 10.149.46.203	10.149.46.203
103	10.149.46.204/31	10.149.46.204 – 10.149.46.205	10.149.46.205
104	10.149.46.206/31	10.149.46.206 – 10.149.46.207	10.149.46.207
105	10.149.46.208/31	10.149.46.208 – 10.149.46.209	10.149.46.209
106	10.149.46.210/31	10.149.46.210 – 10.149.46.211	10.149.46.211
107	10.149.46.212/31	10.149.46.212 – 10.149.46.213	10.149.46.213
108	10.149.46.214/31	10.149.46.214 – 10.149.46.215	10.149.46.215
109	10.149.46.216/31	10.149.46.216 – 10.149.46.217	10.149.46.217
110	10.149.46.218/31	10.149.46.218 – 10.149.46.219	10.149.46.219
111	10.149.46.220/31	10.149.46.220 – 10.149.46.221	10.149.46.221
112	10.149.46.222/31	10.149.46.222 – 10.149.46.223	10.149.46.223
113	10.149.46.224/31	10.149.46.224 – 10.149.46.225	10.149.46.225
114	10.149.46.226/31	10.149.46.226 – 10.149.46.227	10.149.46.227
115	10.149.46.228/31	10.149.46.228 – 10.149.46.229	10.149.46.229
116	10.149.46.230/31	10.149.46.230 – 10.149.46.231	10.149.46.231
117	10.149.46.232/31	10.149.46.232 – 10.149.46.233	10.149.46.233
118	10.149.46.234/31	10.149.46.234 – 10.149.46.235	10.149.46.235
119	10.149.46.236/31	10.149.46.236 – 10.149.46.237	10.149.46.237
120	10.149.46.238/31	10.149.46.238 – 10.149.46.239	10.149.46.239
121	10.149.46.240/31	10.149.46.240 – 10.149.46.241	10.149.46.241
122	10.149.46.242/31	10.149.46.242 – 10.149.46.243	10.149.46.243
123	10.149.46.244/31	10.149.46.244 – 10.149.46.245	10.149.46.245
124	10.149.46.246/31	10.149.46.246 – 10.149.46.247	10.149.46.247
125	10.149.46.248/31	10.149.46.248 – 10.149.46.249	10.149.46.249
126	10.149.46.250/31	10.149.46.250 – 10.149.46.251	10.149.46.251
127	10.149.46.252/31	10.149.46.252 – 10.149.46.253	10.149.46.253
128	10.149.46.254/31	10.149.46.254 – 10.149.46.255	10.149.46.255
129	10.149.47.0/31	10.149.47.0 – 10.149.47.1	10.149.47.1
130	10.149.47.2/31	10.149.47.2 – 10.149.47.3	10.149.47.3
131	10.149.47.4/31	10.149.47.4 – 10.149.47.5	10.149.47.5
132	10.149.47.6/31	10.149.47.6 – 10.149.47.7	10.149.47.7
133	10.149.47.8/31	10.149.47.8 – 10.149.47.9	10.149.47.9
134	10.149.47.10/31	10.149.47.10 – 10.149.47.11	10.149.47.11
135	10.149.47.12/31	10.149.47.12 – 10.149.47.13	10.149.47.13
136	10.149.47.14/31	10.149.47.14 – 10.149.47.15	10.149.47.15
137	10.149.47.16/31	10.149.47.16 – 10.149.47.17	10.149.47.17
138	10.149.47.18/31	10.149.47.18 – 10.149.47.19	10.149.47.19
139	10.149.47.20/31	10.149.47.20 – 10.149.47.21	10.149.47.21
140	10.149.47.22/31	10.149.47.22 – 10.149.47.23	10.149.47.23
141	10.149.47.24/31	10.149.47.24 – 10.149.47.25	10.149.47.25
142	10.149.47.26/31	10.149.47.26 – 10.149.47.27	10.149.47.27
143	10.149.47.28/31	10.149.47.28 – 10.149.47.29	10.149.47.29
144	10.149.47.30/31	10.149.47.30 – 10.149.47.31	10.149.47.31
145	10.149.47.32/31	10.149.47.32 – 10.149.47.33	10.149.47.33
146	10.149.47.34/31	10.149.47.34 – 10.149.47.35	10.149.47.35
147	10.149.47.36/31	10.149.47.36 – 10.149.47.37	10.149.47.37
148	10.149.47.38/31	10.149.47.38 – 10.149.47.39	10.149.47.39
149	10.149.47.40/31	10.149.47.40 – 10.149.47.41	10.149.47.41
150	10.149.47.42/31	10.149.47.42 – 10.149.47.43	10.149.47.43
151	10.149.47.44/31	10.149.47.44 – 10.149.47.45	10.149.47.45
152	10.149.47.46/31	10.149.47.46 – 10.149.47.47	10.149.47.47
153	10.149.47.48/31	10.149.47.48 – 10.149.47.49	10.149.47.49
154	10.149.47.50/31	10.149.47.50 – 10.149.47.51	10.149.47.51
155	10.149.47.52/31	10.149.47.52 – 10.149.47.53	10.149.47.53
156	10.149.47.54/31	10.149.47.54 – 10.149.47.55	10.149.47.55
157	10.149.47.56/31	10.149.47.56 – 10.149.47.57	10.149.47.57
158	10.149.47.58/31	10.149.47.58 – 10.149.47.59	10.149.47.59
159	10.149.47.60/31	10.149.47.60 – 10.149.47.61	10.149.47.61
160	10.149.47.62/31	10.149.47.62 – 10.149.47.63	10.149.47.63
161	10.149.47.64/31	10.149.47.64 – 10.149.47.65	10.149.47.65
162	10.149.47.66/31	10.149.47.66 – 10.149.47.67	10.149.47.67
163	10.149.47.68/31	10.149.47.68 – 10.149.47.69	10.149.47.69
164	10.149.47.70/31	10.149.47.70 – 10.149.47.71	10.149.47.71
165	10.149.47.72/31	10.149.47.72 – 10.149.47.73	10.149.47.73
166	10.149.47.74/31	10.149.47.74 – 10.149.47.75	10.149.47.75
167	10.149.47.76/31	10.149.47.76 – 10.149.47.77	10.149.47.77
168	10.149.47.78/31	10.149.47.78 – 10.149.47.79	10.149.47.79
169	10.149.47.80/31	10.149.47.80 – 10.149.47.81	10.149.47.81
170	10.149.47.82/31	10.149.47.82 – 10.149.47.83	10.149.47.83
171	10.149.47.84/31	10.149.47.84 – 10.149.47.85	10.149.47.85
172	10.149.47.86/31	10.149.47.86 – 10.149.47.87	10.149.47.87
173	10.149.47.88/31	10.149.47.88 – 10.149.47.89	10.149.47.89
174	10.149.47.90/31	10.149.47.90 – 10.149.47.91	10.149.47.91
175	10.149.47.92/31	10.149.47.92 – 10.149.47.93	10.149.47.93
176	10.149.47.94/31	10.149.47.94 – 10.149.47.95	10.149.47.95
177	10.149.47.96/31	10.149.47.96 – 10.149.47.97	10.149.47.97
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179	10.149.47.100/31	10.149.47.100 – 10.149.47.101	10.149.47.101
180	10.149.47.102/31	10.149.47.102 – 10.149.47.103	10.149.47.103
181	10.149.47.104/31	10.149.47.104 – 10.149.47.105	10.149.47.105
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183	10.149.47.108/31	10.149.47.108 – 10.149.47.109	10.149.47.109
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186	10.149.47.114/31	10.149.47.114 – 10.149.47.115	10.149.47.115
187	10.149.47.116/31	10.149.47.116 – 10.149.47.117	10.149.47.117
188	10.149.47.118/31	10.149.47.118 – 10.149.47.119	10.149.47.119
189	10.149.47.120/31	10.149.47.120 – 10.149.47.121	10.149.47.121
190	10.149.47.122/31	10.149.47.122 – 10.149.47.123	10.149.47.123
191	10.149.47.124/31	10.149.47.124 – 10.149.47.125	10.149.47.125
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193	10.149.47.128/31	10.149.47.128 – 10.149.47.129	10.149.47.129
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196	10.149.47.134/31	10.149.47.134 – 10.149.47.135	10.149.47.135
197	10.149.47.136/31	10.149.47.136 – 10.149.47.137	10.149.47.137
198	10.149.47.138/31	10.149.47.138 – 10.149.47.139	10.149.47.139
199	10.149.47.140/31	10.149.47.140 – 10.149.47.141	10.149.47.141
200	10.149.47.142/31	10.149.47.142 – 10.149.47.143	10.149.47.143
201	10.149.47.144/31	10.149.47.144 – 10.149.47.145	10.149.47.145
202	10.149.47.146/31	10.149.47.146 – 10.149.47.147	10.149.47.147
203	10.149.47.148/31	10.149.47.148 – 10.149.47.149	10.149.47.149
204	10.149.47.150/31	10.149.47.150 – 10.149.47.151	10.149.47.151
205	10.149.47.152/31	10.149.47.152 – 10.149.47.153	10.149.47.153
206	10.149.47.154/31	10.149.47.154 – 10.149.47.155	10.149.47.155
207	10.149.47.156/31	10.149.47.156 – 10.149.47.157	10.149.47.157
208	10.149.47.158/31	10.149.47.158 – 10.149.47.159	10.149.47.159
209	10.149.47.160/31	10.149.47.160 – 10.149.47.161	10.149.47.161
210	10.149.47.162/31	10.149.47.162 – 10.149.47.163	10.149.47.163
211	10.149.47.164/31	10.149.47.164 – 10.149.47.165	10.149.47.165
212	10.149.47.166/31	10.149.47.166 – 10.149.47.167	10.149.47.167
213	10.149.47.168/31	10.149.47.168 – 10.149.47.169	10.149.47.169
214	10.149.47.170/31	10.149.47.170 – 10.149.47.171	10.149.47.171
215	10.149.47.172/31	10.149.47.172 – 10.149.47.173	10.149.47.173
216	10.149.47.174/31	10.149.47.174 – 10.149.47.175	10.149.47.175
217	10.149.47.176/31	10.149.47.176 – 10.149.47.177	10.149.47.177
218	10.149.47.178/31	10.149.47.178 – 10.149.47.179	10.149.47.179
219	10.149.47.180/31	10.149.47.180 – 10.149.47.181	10.149.47.181
220	10.149.47.182/31	10.149.47.182 – 10.149.47.183	10.149.47.183
221	10.149.47.184/31	10.149.47.184 – 10.149.47.185	10.149.47.185
222	10.149.47.186/31	10.149.47.186 – 10.149.47.187	10.149.47.187
223	10.149.47.188/31	10.149.47.188 – 10.149.47.189	10.149.47.189
224	10.149.47.190/31	10.149.47.190 – 10.149.47.191	10.149.47.191
225	10.149.47.192/31	10.149.47.192 – 10.149.47.193	10.149.47.193
226	10.149.47.194/31	10.149.47.194 – 10.149.47.195	10.149.47.195
227	10.149.47.196/31	10.149.47.196 – 10.149.47.197	10.149.47.197
228	10.149.47.198/31	10.149.47.198 – 10.149.47.199	10.149.47.199
229	10.149.47.200/31	10.149.47.200 – 10.149.47.201	10.149.47.201
230	10.149.47.202/31	10.149.47.202 – 10.149.47.203	10.149.47.203
231	10.149.47.204/31	10.149.47.204 – 10.149.47.205	10.149.47.205
232	10.149.47.206/31	10.149.47.206 – 10.149.47.207	10.149.47.207
233	10.149.47.208/31	10.149.47.208 – 10.149.47.209	10.149.47.209
234	10.149.47.210/31	10.149.47.210 – 10.149.47.211	10.149.47.211
235	10.149.47.212/31	10.149.47.212 – 10.149.47.213	10.149.47.213
236	10.149.47.214/31	10.149.47.214 – 10.149.47.215	10.149.47.215
237	10.149.47.216/31	10.149.47.216 – 10.149.47.217	10.149.47.217
238	10.149.47.218/31	10.149.47.218 – 10.149.47.219	10.149.47.219
239	10.149.47.220/31	10.149.47.220 – 10.149.47.221	10.149.47.221
240	10.149.47.222/31	10.149.47.222 – 10.149.47.223	10.149.47.223
241	10.149.47.224/31	10.149.47.224 – 10.149.47.225	10.149.47.225
242	10.149.47.226/31	10.149.47.226 – 10.149.47.227	10.149.47.227
243	10.149.47.228/31	10.149.47.228 – 10.149.47.229	10.149.47.229
244	10.149.47.230/31	10.149.47.230 – 10.149.47.231	10.149.47.231
245	10.149.47.232/31	10.149.47.232 – 10.149.47.233	10.149.47.233
246	10.149.47.234/31	10.149.47.234 – 10.149.47.235	10.149.47.235
247	10.149.47.236/31	10.149.47.236 – 10.149.47.237	10.149.47.237
248	10.149.47.238/31	10.149.47.238 – 10.149.47.239	10.149.47.239
249	10.149.47.240/31	10.149.47.240 – 10.149.47.241	10.149.47.241
250	10.149.47.242/31	10.149.47.242 – 10.149.47.243	10.149.47.243
251	10.149.47.244/31	10.149.47.244 – 10.149.47.245	10.149.47.245
252	10.149.47.246/31	10.149.47.246 – 10.149.47.247	10.149.47.247
253	10.149.47.248/31	10.149.47.248 – 10.149.47.249	10.149.47.249
254	10.149.47.250/31	10.149.47.250 – 10.149.47.251	10.149.47.251
255	10.149.47.252/31	10.149.47.252 – 10.149.47.253	10.149.47.253
256	10.149.47.254/31	10.149.47.254 – 10.149.47.255	10.149.47.255

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 /23
/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	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 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 →