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)10.30.76.0/23

network10.30.76.0/23

broadcast10.30.77.255

first host10.30.76.1

last host10.30.77.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.30.76.0/23

address00001010.00011110.01001100.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00011110.01001100.00000000

broadcast00001010.00011110.01001101.11111111

green = network part, grey = host part

hex0x0a1e4c00

decimal169757696

reverse dns0.76.30.10.in-addr.arpa

ipv4-mapped::ffff:a1e:4c00

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.30.76.0/31	10.30.76.0 – 10.30.76.1	10.30.76.1
2	10.30.76.2/31	10.30.76.2 – 10.30.76.3	10.30.76.3
3	10.30.76.4/31	10.30.76.4 – 10.30.76.5	10.30.76.5
4	10.30.76.6/31	10.30.76.6 – 10.30.76.7	10.30.76.7
5	10.30.76.8/31	10.30.76.8 – 10.30.76.9	10.30.76.9
6	10.30.76.10/31	10.30.76.10 – 10.30.76.11	10.30.76.11
7	10.30.76.12/31	10.30.76.12 – 10.30.76.13	10.30.76.13
8	10.30.76.14/31	10.30.76.14 – 10.30.76.15	10.30.76.15
9	10.30.76.16/31	10.30.76.16 – 10.30.76.17	10.30.76.17
10	10.30.76.18/31	10.30.76.18 – 10.30.76.19	10.30.76.19
11	10.30.76.20/31	10.30.76.20 – 10.30.76.21	10.30.76.21
12	10.30.76.22/31	10.30.76.22 – 10.30.76.23	10.30.76.23
13	10.30.76.24/31	10.30.76.24 – 10.30.76.25	10.30.76.25
14	10.30.76.26/31	10.30.76.26 – 10.30.76.27	10.30.76.27
15	10.30.76.28/31	10.30.76.28 – 10.30.76.29	10.30.76.29
16	10.30.76.30/31	10.30.76.30 – 10.30.76.31	10.30.76.31
17	10.30.76.32/31	10.30.76.32 – 10.30.76.33	10.30.76.33
18	10.30.76.34/31	10.30.76.34 – 10.30.76.35	10.30.76.35
19	10.30.76.36/31	10.30.76.36 – 10.30.76.37	10.30.76.37
20	10.30.76.38/31	10.30.76.38 – 10.30.76.39	10.30.76.39
21	10.30.76.40/31	10.30.76.40 – 10.30.76.41	10.30.76.41
22	10.30.76.42/31	10.30.76.42 – 10.30.76.43	10.30.76.43
23	10.30.76.44/31	10.30.76.44 – 10.30.76.45	10.30.76.45
24	10.30.76.46/31	10.30.76.46 – 10.30.76.47	10.30.76.47
25	10.30.76.48/31	10.30.76.48 – 10.30.76.49	10.30.76.49
26	10.30.76.50/31	10.30.76.50 – 10.30.76.51	10.30.76.51
27	10.30.76.52/31	10.30.76.52 – 10.30.76.53	10.30.76.53
28	10.30.76.54/31	10.30.76.54 – 10.30.76.55	10.30.76.55
29	10.30.76.56/31	10.30.76.56 – 10.30.76.57	10.30.76.57
30	10.30.76.58/31	10.30.76.58 – 10.30.76.59	10.30.76.59
31	10.30.76.60/31	10.30.76.60 – 10.30.76.61	10.30.76.61
32	10.30.76.62/31	10.30.76.62 – 10.30.76.63	10.30.76.63
33	10.30.76.64/31	10.30.76.64 – 10.30.76.65	10.30.76.65
34	10.30.76.66/31	10.30.76.66 – 10.30.76.67	10.30.76.67
35	10.30.76.68/31	10.30.76.68 – 10.30.76.69	10.30.76.69
36	10.30.76.70/31	10.30.76.70 – 10.30.76.71	10.30.76.71
37	10.30.76.72/31	10.30.76.72 – 10.30.76.73	10.30.76.73
38	10.30.76.74/31	10.30.76.74 – 10.30.76.75	10.30.76.75
39	10.30.76.76/31	10.30.76.76 – 10.30.76.77	10.30.76.77
40	10.30.76.78/31	10.30.76.78 – 10.30.76.79	10.30.76.79
41	10.30.76.80/31	10.30.76.80 – 10.30.76.81	10.30.76.81
42	10.30.76.82/31	10.30.76.82 – 10.30.76.83	10.30.76.83
43	10.30.76.84/31	10.30.76.84 – 10.30.76.85	10.30.76.85
44	10.30.76.86/31	10.30.76.86 – 10.30.76.87	10.30.76.87
45	10.30.76.88/31	10.30.76.88 – 10.30.76.89	10.30.76.89
46	10.30.76.90/31	10.30.76.90 – 10.30.76.91	10.30.76.91
47	10.30.76.92/31	10.30.76.92 – 10.30.76.93	10.30.76.93
48	10.30.76.94/31	10.30.76.94 – 10.30.76.95	10.30.76.95
49	10.30.76.96/31	10.30.76.96 – 10.30.76.97	10.30.76.97
50	10.30.76.98/31	10.30.76.98 – 10.30.76.99	10.30.76.99
51	10.30.76.100/31	10.30.76.100 – 10.30.76.101	10.30.76.101
52	10.30.76.102/31	10.30.76.102 – 10.30.76.103	10.30.76.103
53	10.30.76.104/31	10.30.76.104 – 10.30.76.105	10.30.76.105
54	10.30.76.106/31	10.30.76.106 – 10.30.76.107	10.30.76.107
55	10.30.76.108/31	10.30.76.108 – 10.30.76.109	10.30.76.109
56	10.30.76.110/31	10.30.76.110 – 10.30.76.111	10.30.76.111
57	10.30.76.112/31	10.30.76.112 – 10.30.76.113	10.30.76.113
58	10.30.76.114/31	10.30.76.114 – 10.30.76.115	10.30.76.115
59	10.30.76.116/31	10.30.76.116 – 10.30.76.117	10.30.76.117
60	10.30.76.118/31	10.30.76.118 – 10.30.76.119	10.30.76.119
61	10.30.76.120/31	10.30.76.120 – 10.30.76.121	10.30.76.121
62	10.30.76.122/31	10.30.76.122 – 10.30.76.123	10.30.76.123
63	10.30.76.124/31	10.30.76.124 – 10.30.76.125	10.30.76.125
64	10.30.76.126/31	10.30.76.126 – 10.30.76.127	10.30.76.127
65	10.30.76.128/31	10.30.76.128 – 10.30.76.129	10.30.76.129
66	10.30.76.130/31	10.30.76.130 – 10.30.76.131	10.30.76.131
67	10.30.76.132/31	10.30.76.132 – 10.30.76.133	10.30.76.133
68	10.30.76.134/31	10.30.76.134 – 10.30.76.135	10.30.76.135
69	10.30.76.136/31	10.30.76.136 – 10.30.76.137	10.30.76.137
70	10.30.76.138/31	10.30.76.138 – 10.30.76.139	10.30.76.139
71	10.30.76.140/31	10.30.76.140 – 10.30.76.141	10.30.76.141
72	10.30.76.142/31	10.30.76.142 – 10.30.76.143	10.30.76.143
73	10.30.76.144/31	10.30.76.144 – 10.30.76.145	10.30.76.145
74	10.30.76.146/31	10.30.76.146 – 10.30.76.147	10.30.76.147
75	10.30.76.148/31	10.30.76.148 – 10.30.76.149	10.30.76.149
76	10.30.76.150/31	10.30.76.150 – 10.30.76.151	10.30.76.151
77	10.30.76.152/31	10.30.76.152 – 10.30.76.153	10.30.76.153
78	10.30.76.154/31	10.30.76.154 – 10.30.76.155	10.30.76.155
79	10.30.76.156/31	10.30.76.156 – 10.30.76.157	10.30.76.157
80	10.30.76.158/31	10.30.76.158 – 10.30.76.159	10.30.76.159
81	10.30.76.160/31	10.30.76.160 – 10.30.76.161	10.30.76.161
82	10.30.76.162/31	10.30.76.162 – 10.30.76.163	10.30.76.163
83	10.30.76.164/31	10.30.76.164 – 10.30.76.165	10.30.76.165
84	10.30.76.166/31	10.30.76.166 – 10.30.76.167	10.30.76.167
85	10.30.76.168/31	10.30.76.168 – 10.30.76.169	10.30.76.169
86	10.30.76.170/31	10.30.76.170 – 10.30.76.171	10.30.76.171
87	10.30.76.172/31	10.30.76.172 – 10.30.76.173	10.30.76.173
88	10.30.76.174/31	10.30.76.174 – 10.30.76.175	10.30.76.175
89	10.30.76.176/31	10.30.76.176 – 10.30.76.177	10.30.76.177
90	10.30.76.178/31	10.30.76.178 – 10.30.76.179	10.30.76.179
91	10.30.76.180/31	10.30.76.180 – 10.30.76.181	10.30.76.181
92	10.30.76.182/31	10.30.76.182 – 10.30.76.183	10.30.76.183
93	10.30.76.184/31	10.30.76.184 – 10.30.76.185	10.30.76.185
94	10.30.76.186/31	10.30.76.186 – 10.30.76.187	10.30.76.187
95	10.30.76.188/31	10.30.76.188 – 10.30.76.189	10.30.76.189
96	10.30.76.190/31	10.30.76.190 – 10.30.76.191	10.30.76.191
97	10.30.76.192/31	10.30.76.192 – 10.30.76.193	10.30.76.193
98	10.30.76.194/31	10.30.76.194 – 10.30.76.195	10.30.76.195
99	10.30.76.196/31	10.30.76.196 – 10.30.76.197	10.30.76.197
100	10.30.76.198/31	10.30.76.198 – 10.30.76.199	10.30.76.199
101	10.30.76.200/31	10.30.76.200 – 10.30.76.201	10.30.76.201
102	10.30.76.202/31	10.30.76.202 – 10.30.76.203	10.30.76.203
103	10.30.76.204/31	10.30.76.204 – 10.30.76.205	10.30.76.205
104	10.30.76.206/31	10.30.76.206 – 10.30.76.207	10.30.76.207
105	10.30.76.208/31	10.30.76.208 – 10.30.76.209	10.30.76.209
106	10.30.76.210/31	10.30.76.210 – 10.30.76.211	10.30.76.211
107	10.30.76.212/31	10.30.76.212 – 10.30.76.213	10.30.76.213
108	10.30.76.214/31	10.30.76.214 – 10.30.76.215	10.30.76.215
109	10.30.76.216/31	10.30.76.216 – 10.30.76.217	10.30.76.217
110	10.30.76.218/31	10.30.76.218 – 10.30.76.219	10.30.76.219
111	10.30.76.220/31	10.30.76.220 – 10.30.76.221	10.30.76.221
112	10.30.76.222/31	10.30.76.222 – 10.30.76.223	10.30.76.223
113	10.30.76.224/31	10.30.76.224 – 10.30.76.225	10.30.76.225
114	10.30.76.226/31	10.30.76.226 – 10.30.76.227	10.30.76.227
115	10.30.76.228/31	10.30.76.228 – 10.30.76.229	10.30.76.229
116	10.30.76.230/31	10.30.76.230 – 10.30.76.231	10.30.76.231
117	10.30.76.232/31	10.30.76.232 – 10.30.76.233	10.30.76.233
118	10.30.76.234/31	10.30.76.234 – 10.30.76.235	10.30.76.235
119	10.30.76.236/31	10.30.76.236 – 10.30.76.237	10.30.76.237
120	10.30.76.238/31	10.30.76.238 – 10.30.76.239	10.30.76.239
121	10.30.76.240/31	10.30.76.240 – 10.30.76.241	10.30.76.241
122	10.30.76.242/31	10.30.76.242 – 10.30.76.243	10.30.76.243
123	10.30.76.244/31	10.30.76.244 – 10.30.76.245	10.30.76.245
124	10.30.76.246/31	10.30.76.246 – 10.30.76.247	10.30.76.247
125	10.30.76.248/31	10.30.76.248 – 10.30.76.249	10.30.76.249
126	10.30.76.250/31	10.30.76.250 – 10.30.76.251	10.30.76.251
127	10.30.76.252/31	10.30.76.252 – 10.30.76.253	10.30.76.253
128	10.30.76.254/31	10.30.76.254 – 10.30.76.255	10.30.76.255
129	10.30.77.0/31	10.30.77.0 – 10.30.77.1	10.30.77.1
130	10.30.77.2/31	10.30.77.2 – 10.30.77.3	10.30.77.3
131	10.30.77.4/31	10.30.77.4 – 10.30.77.5	10.30.77.5
132	10.30.77.6/31	10.30.77.6 – 10.30.77.7	10.30.77.7
133	10.30.77.8/31	10.30.77.8 – 10.30.77.9	10.30.77.9
134	10.30.77.10/31	10.30.77.10 – 10.30.77.11	10.30.77.11
135	10.30.77.12/31	10.30.77.12 – 10.30.77.13	10.30.77.13
136	10.30.77.14/31	10.30.77.14 – 10.30.77.15	10.30.77.15
137	10.30.77.16/31	10.30.77.16 – 10.30.77.17	10.30.77.17
138	10.30.77.18/31	10.30.77.18 – 10.30.77.19	10.30.77.19
139	10.30.77.20/31	10.30.77.20 – 10.30.77.21	10.30.77.21
140	10.30.77.22/31	10.30.77.22 – 10.30.77.23	10.30.77.23
141	10.30.77.24/31	10.30.77.24 – 10.30.77.25	10.30.77.25
142	10.30.77.26/31	10.30.77.26 – 10.30.77.27	10.30.77.27
143	10.30.77.28/31	10.30.77.28 – 10.30.77.29	10.30.77.29
144	10.30.77.30/31	10.30.77.30 – 10.30.77.31	10.30.77.31
145	10.30.77.32/31	10.30.77.32 – 10.30.77.33	10.30.77.33
146	10.30.77.34/31	10.30.77.34 – 10.30.77.35	10.30.77.35
147	10.30.77.36/31	10.30.77.36 – 10.30.77.37	10.30.77.37
148	10.30.77.38/31	10.30.77.38 – 10.30.77.39	10.30.77.39
149	10.30.77.40/31	10.30.77.40 – 10.30.77.41	10.30.77.41
150	10.30.77.42/31	10.30.77.42 – 10.30.77.43	10.30.77.43
151	10.30.77.44/31	10.30.77.44 – 10.30.77.45	10.30.77.45
152	10.30.77.46/31	10.30.77.46 – 10.30.77.47	10.30.77.47
153	10.30.77.48/31	10.30.77.48 – 10.30.77.49	10.30.77.49
154	10.30.77.50/31	10.30.77.50 – 10.30.77.51	10.30.77.51
155	10.30.77.52/31	10.30.77.52 – 10.30.77.53	10.30.77.53
156	10.30.77.54/31	10.30.77.54 – 10.30.77.55	10.30.77.55
157	10.30.77.56/31	10.30.77.56 – 10.30.77.57	10.30.77.57
158	10.30.77.58/31	10.30.77.58 – 10.30.77.59	10.30.77.59
159	10.30.77.60/31	10.30.77.60 – 10.30.77.61	10.30.77.61
160	10.30.77.62/31	10.30.77.62 – 10.30.77.63	10.30.77.63
161	10.30.77.64/31	10.30.77.64 – 10.30.77.65	10.30.77.65
162	10.30.77.66/31	10.30.77.66 – 10.30.77.67	10.30.77.67
163	10.30.77.68/31	10.30.77.68 – 10.30.77.69	10.30.77.69
164	10.30.77.70/31	10.30.77.70 – 10.30.77.71	10.30.77.71
165	10.30.77.72/31	10.30.77.72 – 10.30.77.73	10.30.77.73
166	10.30.77.74/31	10.30.77.74 – 10.30.77.75	10.30.77.75
167	10.30.77.76/31	10.30.77.76 – 10.30.77.77	10.30.77.77
168	10.30.77.78/31	10.30.77.78 – 10.30.77.79	10.30.77.79
169	10.30.77.80/31	10.30.77.80 – 10.30.77.81	10.30.77.81
170	10.30.77.82/31	10.30.77.82 – 10.30.77.83	10.30.77.83
171	10.30.77.84/31	10.30.77.84 – 10.30.77.85	10.30.77.85
172	10.30.77.86/31	10.30.77.86 – 10.30.77.87	10.30.77.87
173	10.30.77.88/31	10.30.77.88 – 10.30.77.89	10.30.77.89
174	10.30.77.90/31	10.30.77.90 – 10.30.77.91	10.30.77.91
175	10.30.77.92/31	10.30.77.92 – 10.30.77.93	10.30.77.93
176	10.30.77.94/31	10.30.77.94 – 10.30.77.95	10.30.77.95
177	10.30.77.96/31	10.30.77.96 – 10.30.77.97	10.30.77.97
178	10.30.77.98/31	10.30.77.98 – 10.30.77.99	10.30.77.99
179	10.30.77.100/31	10.30.77.100 – 10.30.77.101	10.30.77.101
180	10.30.77.102/31	10.30.77.102 – 10.30.77.103	10.30.77.103
181	10.30.77.104/31	10.30.77.104 – 10.30.77.105	10.30.77.105
182	10.30.77.106/31	10.30.77.106 – 10.30.77.107	10.30.77.107
183	10.30.77.108/31	10.30.77.108 – 10.30.77.109	10.30.77.109
184	10.30.77.110/31	10.30.77.110 – 10.30.77.111	10.30.77.111
185	10.30.77.112/31	10.30.77.112 – 10.30.77.113	10.30.77.113
186	10.30.77.114/31	10.30.77.114 – 10.30.77.115	10.30.77.115
187	10.30.77.116/31	10.30.77.116 – 10.30.77.117	10.30.77.117
188	10.30.77.118/31	10.30.77.118 – 10.30.77.119	10.30.77.119
189	10.30.77.120/31	10.30.77.120 – 10.30.77.121	10.30.77.121
190	10.30.77.122/31	10.30.77.122 – 10.30.77.123	10.30.77.123
191	10.30.77.124/31	10.30.77.124 – 10.30.77.125	10.30.77.125
192	10.30.77.126/31	10.30.77.126 – 10.30.77.127	10.30.77.127
193	10.30.77.128/31	10.30.77.128 – 10.30.77.129	10.30.77.129
194	10.30.77.130/31	10.30.77.130 – 10.30.77.131	10.30.77.131
195	10.30.77.132/31	10.30.77.132 – 10.30.77.133	10.30.77.133
196	10.30.77.134/31	10.30.77.134 – 10.30.77.135	10.30.77.135
197	10.30.77.136/31	10.30.77.136 – 10.30.77.137	10.30.77.137
198	10.30.77.138/31	10.30.77.138 – 10.30.77.139	10.30.77.139
199	10.30.77.140/31	10.30.77.140 – 10.30.77.141	10.30.77.141
200	10.30.77.142/31	10.30.77.142 – 10.30.77.143	10.30.77.143
201	10.30.77.144/31	10.30.77.144 – 10.30.77.145	10.30.77.145
202	10.30.77.146/31	10.30.77.146 – 10.30.77.147	10.30.77.147
203	10.30.77.148/31	10.30.77.148 – 10.30.77.149	10.30.77.149
204	10.30.77.150/31	10.30.77.150 – 10.30.77.151	10.30.77.151
205	10.30.77.152/31	10.30.77.152 – 10.30.77.153	10.30.77.153
206	10.30.77.154/31	10.30.77.154 – 10.30.77.155	10.30.77.155
207	10.30.77.156/31	10.30.77.156 – 10.30.77.157	10.30.77.157
208	10.30.77.158/31	10.30.77.158 – 10.30.77.159	10.30.77.159
209	10.30.77.160/31	10.30.77.160 – 10.30.77.161	10.30.77.161
210	10.30.77.162/31	10.30.77.162 – 10.30.77.163	10.30.77.163
211	10.30.77.164/31	10.30.77.164 – 10.30.77.165	10.30.77.165
212	10.30.77.166/31	10.30.77.166 – 10.30.77.167	10.30.77.167
213	10.30.77.168/31	10.30.77.168 – 10.30.77.169	10.30.77.169
214	10.30.77.170/31	10.30.77.170 – 10.30.77.171	10.30.77.171
215	10.30.77.172/31	10.30.77.172 – 10.30.77.173	10.30.77.173
216	10.30.77.174/31	10.30.77.174 – 10.30.77.175	10.30.77.175
217	10.30.77.176/31	10.30.77.176 – 10.30.77.177	10.30.77.177
218	10.30.77.178/31	10.30.77.178 – 10.30.77.179	10.30.77.179
219	10.30.77.180/31	10.30.77.180 – 10.30.77.181	10.30.77.181
220	10.30.77.182/31	10.30.77.182 – 10.30.77.183	10.30.77.183
221	10.30.77.184/31	10.30.77.184 – 10.30.77.185	10.30.77.185
222	10.30.77.186/31	10.30.77.186 – 10.30.77.187	10.30.77.187
223	10.30.77.188/31	10.30.77.188 – 10.30.77.189	10.30.77.189
224	10.30.77.190/31	10.30.77.190 – 10.30.77.191	10.30.77.191
225	10.30.77.192/31	10.30.77.192 – 10.30.77.193	10.30.77.193
226	10.30.77.194/31	10.30.77.194 – 10.30.77.195	10.30.77.195
227	10.30.77.196/31	10.30.77.196 – 10.30.77.197	10.30.77.197
228	10.30.77.198/31	10.30.77.198 – 10.30.77.199	10.30.77.199
229	10.30.77.200/31	10.30.77.200 – 10.30.77.201	10.30.77.201
230	10.30.77.202/31	10.30.77.202 – 10.30.77.203	10.30.77.203
231	10.30.77.204/31	10.30.77.204 – 10.30.77.205	10.30.77.205
232	10.30.77.206/31	10.30.77.206 – 10.30.77.207	10.30.77.207
233	10.30.77.208/31	10.30.77.208 – 10.30.77.209	10.30.77.209
234	10.30.77.210/31	10.30.77.210 – 10.30.77.211	10.30.77.211
235	10.30.77.212/31	10.30.77.212 – 10.30.77.213	10.30.77.213
236	10.30.77.214/31	10.30.77.214 – 10.30.77.215	10.30.77.215
237	10.30.77.216/31	10.30.77.216 – 10.30.77.217	10.30.77.217
238	10.30.77.218/31	10.30.77.218 – 10.30.77.219	10.30.77.219
239	10.30.77.220/31	10.30.77.220 – 10.30.77.221	10.30.77.221
240	10.30.77.222/31	10.30.77.222 – 10.30.77.223	10.30.77.223
241	10.30.77.224/31	10.30.77.224 – 10.30.77.225	10.30.77.225
242	10.30.77.226/31	10.30.77.226 – 10.30.77.227	10.30.77.227
243	10.30.77.228/31	10.30.77.228 – 10.30.77.229	10.30.77.229
244	10.30.77.230/31	10.30.77.230 – 10.30.77.231	10.30.77.231
245	10.30.77.232/31	10.30.77.232 – 10.30.77.233	10.30.77.233
246	10.30.77.234/31	10.30.77.234 – 10.30.77.235	10.30.77.235
247	10.30.77.236/31	10.30.77.236 – 10.30.77.237	10.30.77.237
248	10.30.77.238/31	10.30.77.238 – 10.30.77.239	10.30.77.239
249	10.30.77.240/31	10.30.77.240 – 10.30.77.241	10.30.77.241
250	10.30.77.242/31	10.30.77.242 – 10.30.77.243	10.30.77.243
251	10.30.77.244/31	10.30.77.244 – 10.30.77.245	10.30.77.245
252	10.30.77.246/31	10.30.77.246 – 10.30.77.247	10.30.77.247
253	10.30.77.248/31	10.30.77.248 – 10.30.77.249	10.30.77.249
254	10.30.77.250/31	10.30.77.250 – 10.30.77.251	10.30.77.251
255	10.30.77.252/31	10.30.77.252 – 10.30.77.253	10.30.77.253
256	10.30.77.254/31	10.30.77.254 – 10.30.77.255	10.30.77.255

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 →