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)10.45.34.0/23

network10.45.34.0/23

broadcast10.45.35.255

first host10.45.34.1

last host10.45.35.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.45.34.0/23

address00001010.00101101.00100010.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00101101.00100010.00000000

broadcast00001010.00101101.00100011.11111111

green = network part, grey = host part

hex0x0a2d2200

decimal170729984

reverse dns0.34.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:2200

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.45.34.0/31	10.45.34.0 – 10.45.34.1	10.45.34.1
2	10.45.34.2/31	10.45.34.2 – 10.45.34.3	10.45.34.3
3	10.45.34.4/31	10.45.34.4 – 10.45.34.5	10.45.34.5
4	10.45.34.6/31	10.45.34.6 – 10.45.34.7	10.45.34.7
5	10.45.34.8/31	10.45.34.8 – 10.45.34.9	10.45.34.9
6	10.45.34.10/31	10.45.34.10 – 10.45.34.11	10.45.34.11
7	10.45.34.12/31	10.45.34.12 – 10.45.34.13	10.45.34.13
8	10.45.34.14/31	10.45.34.14 – 10.45.34.15	10.45.34.15
9	10.45.34.16/31	10.45.34.16 – 10.45.34.17	10.45.34.17
10	10.45.34.18/31	10.45.34.18 – 10.45.34.19	10.45.34.19
11	10.45.34.20/31	10.45.34.20 – 10.45.34.21	10.45.34.21
12	10.45.34.22/31	10.45.34.22 – 10.45.34.23	10.45.34.23
13	10.45.34.24/31	10.45.34.24 – 10.45.34.25	10.45.34.25
14	10.45.34.26/31	10.45.34.26 – 10.45.34.27	10.45.34.27
15	10.45.34.28/31	10.45.34.28 – 10.45.34.29	10.45.34.29
16	10.45.34.30/31	10.45.34.30 – 10.45.34.31	10.45.34.31
17	10.45.34.32/31	10.45.34.32 – 10.45.34.33	10.45.34.33
18	10.45.34.34/31	10.45.34.34 – 10.45.34.35	10.45.34.35
19	10.45.34.36/31	10.45.34.36 – 10.45.34.37	10.45.34.37
20	10.45.34.38/31	10.45.34.38 – 10.45.34.39	10.45.34.39
21	10.45.34.40/31	10.45.34.40 – 10.45.34.41	10.45.34.41
22	10.45.34.42/31	10.45.34.42 – 10.45.34.43	10.45.34.43
23	10.45.34.44/31	10.45.34.44 – 10.45.34.45	10.45.34.45
24	10.45.34.46/31	10.45.34.46 – 10.45.34.47	10.45.34.47
25	10.45.34.48/31	10.45.34.48 – 10.45.34.49	10.45.34.49
26	10.45.34.50/31	10.45.34.50 – 10.45.34.51	10.45.34.51
27	10.45.34.52/31	10.45.34.52 – 10.45.34.53	10.45.34.53
28	10.45.34.54/31	10.45.34.54 – 10.45.34.55	10.45.34.55
29	10.45.34.56/31	10.45.34.56 – 10.45.34.57	10.45.34.57
30	10.45.34.58/31	10.45.34.58 – 10.45.34.59	10.45.34.59
31	10.45.34.60/31	10.45.34.60 – 10.45.34.61	10.45.34.61
32	10.45.34.62/31	10.45.34.62 – 10.45.34.63	10.45.34.63
33	10.45.34.64/31	10.45.34.64 – 10.45.34.65	10.45.34.65
34	10.45.34.66/31	10.45.34.66 – 10.45.34.67	10.45.34.67
35	10.45.34.68/31	10.45.34.68 – 10.45.34.69	10.45.34.69
36	10.45.34.70/31	10.45.34.70 – 10.45.34.71	10.45.34.71
37	10.45.34.72/31	10.45.34.72 – 10.45.34.73	10.45.34.73
38	10.45.34.74/31	10.45.34.74 – 10.45.34.75	10.45.34.75
39	10.45.34.76/31	10.45.34.76 – 10.45.34.77	10.45.34.77
40	10.45.34.78/31	10.45.34.78 – 10.45.34.79	10.45.34.79
41	10.45.34.80/31	10.45.34.80 – 10.45.34.81	10.45.34.81
42	10.45.34.82/31	10.45.34.82 – 10.45.34.83	10.45.34.83
43	10.45.34.84/31	10.45.34.84 – 10.45.34.85	10.45.34.85
44	10.45.34.86/31	10.45.34.86 – 10.45.34.87	10.45.34.87
45	10.45.34.88/31	10.45.34.88 – 10.45.34.89	10.45.34.89
46	10.45.34.90/31	10.45.34.90 – 10.45.34.91	10.45.34.91
47	10.45.34.92/31	10.45.34.92 – 10.45.34.93	10.45.34.93
48	10.45.34.94/31	10.45.34.94 – 10.45.34.95	10.45.34.95
49	10.45.34.96/31	10.45.34.96 – 10.45.34.97	10.45.34.97
50	10.45.34.98/31	10.45.34.98 – 10.45.34.99	10.45.34.99
51	10.45.34.100/31	10.45.34.100 – 10.45.34.101	10.45.34.101
52	10.45.34.102/31	10.45.34.102 – 10.45.34.103	10.45.34.103
53	10.45.34.104/31	10.45.34.104 – 10.45.34.105	10.45.34.105
54	10.45.34.106/31	10.45.34.106 – 10.45.34.107	10.45.34.107
55	10.45.34.108/31	10.45.34.108 – 10.45.34.109	10.45.34.109
56	10.45.34.110/31	10.45.34.110 – 10.45.34.111	10.45.34.111
57	10.45.34.112/31	10.45.34.112 – 10.45.34.113	10.45.34.113
58	10.45.34.114/31	10.45.34.114 – 10.45.34.115	10.45.34.115
59	10.45.34.116/31	10.45.34.116 – 10.45.34.117	10.45.34.117
60	10.45.34.118/31	10.45.34.118 – 10.45.34.119	10.45.34.119
61	10.45.34.120/31	10.45.34.120 – 10.45.34.121	10.45.34.121
62	10.45.34.122/31	10.45.34.122 – 10.45.34.123	10.45.34.123
63	10.45.34.124/31	10.45.34.124 – 10.45.34.125	10.45.34.125
64	10.45.34.126/31	10.45.34.126 – 10.45.34.127	10.45.34.127
65	10.45.34.128/31	10.45.34.128 – 10.45.34.129	10.45.34.129
66	10.45.34.130/31	10.45.34.130 – 10.45.34.131	10.45.34.131
67	10.45.34.132/31	10.45.34.132 – 10.45.34.133	10.45.34.133
68	10.45.34.134/31	10.45.34.134 – 10.45.34.135	10.45.34.135
69	10.45.34.136/31	10.45.34.136 – 10.45.34.137	10.45.34.137
70	10.45.34.138/31	10.45.34.138 – 10.45.34.139	10.45.34.139
71	10.45.34.140/31	10.45.34.140 – 10.45.34.141	10.45.34.141
72	10.45.34.142/31	10.45.34.142 – 10.45.34.143	10.45.34.143
73	10.45.34.144/31	10.45.34.144 – 10.45.34.145	10.45.34.145
74	10.45.34.146/31	10.45.34.146 – 10.45.34.147	10.45.34.147
75	10.45.34.148/31	10.45.34.148 – 10.45.34.149	10.45.34.149
76	10.45.34.150/31	10.45.34.150 – 10.45.34.151	10.45.34.151
77	10.45.34.152/31	10.45.34.152 – 10.45.34.153	10.45.34.153
78	10.45.34.154/31	10.45.34.154 – 10.45.34.155	10.45.34.155
79	10.45.34.156/31	10.45.34.156 – 10.45.34.157	10.45.34.157
80	10.45.34.158/31	10.45.34.158 – 10.45.34.159	10.45.34.159
81	10.45.34.160/31	10.45.34.160 – 10.45.34.161	10.45.34.161
82	10.45.34.162/31	10.45.34.162 – 10.45.34.163	10.45.34.163
83	10.45.34.164/31	10.45.34.164 – 10.45.34.165	10.45.34.165
84	10.45.34.166/31	10.45.34.166 – 10.45.34.167	10.45.34.167
85	10.45.34.168/31	10.45.34.168 – 10.45.34.169	10.45.34.169
86	10.45.34.170/31	10.45.34.170 – 10.45.34.171	10.45.34.171
87	10.45.34.172/31	10.45.34.172 – 10.45.34.173	10.45.34.173
88	10.45.34.174/31	10.45.34.174 – 10.45.34.175	10.45.34.175
89	10.45.34.176/31	10.45.34.176 – 10.45.34.177	10.45.34.177
90	10.45.34.178/31	10.45.34.178 – 10.45.34.179	10.45.34.179
91	10.45.34.180/31	10.45.34.180 – 10.45.34.181	10.45.34.181
92	10.45.34.182/31	10.45.34.182 – 10.45.34.183	10.45.34.183
93	10.45.34.184/31	10.45.34.184 – 10.45.34.185	10.45.34.185
94	10.45.34.186/31	10.45.34.186 – 10.45.34.187	10.45.34.187
95	10.45.34.188/31	10.45.34.188 – 10.45.34.189	10.45.34.189
96	10.45.34.190/31	10.45.34.190 – 10.45.34.191	10.45.34.191
97	10.45.34.192/31	10.45.34.192 – 10.45.34.193	10.45.34.193
98	10.45.34.194/31	10.45.34.194 – 10.45.34.195	10.45.34.195
99	10.45.34.196/31	10.45.34.196 – 10.45.34.197	10.45.34.197
100	10.45.34.198/31	10.45.34.198 – 10.45.34.199	10.45.34.199
101	10.45.34.200/31	10.45.34.200 – 10.45.34.201	10.45.34.201
102	10.45.34.202/31	10.45.34.202 – 10.45.34.203	10.45.34.203
103	10.45.34.204/31	10.45.34.204 – 10.45.34.205	10.45.34.205
104	10.45.34.206/31	10.45.34.206 – 10.45.34.207	10.45.34.207
105	10.45.34.208/31	10.45.34.208 – 10.45.34.209	10.45.34.209
106	10.45.34.210/31	10.45.34.210 – 10.45.34.211	10.45.34.211
107	10.45.34.212/31	10.45.34.212 – 10.45.34.213	10.45.34.213
108	10.45.34.214/31	10.45.34.214 – 10.45.34.215	10.45.34.215
109	10.45.34.216/31	10.45.34.216 – 10.45.34.217	10.45.34.217
110	10.45.34.218/31	10.45.34.218 – 10.45.34.219	10.45.34.219
111	10.45.34.220/31	10.45.34.220 – 10.45.34.221	10.45.34.221
112	10.45.34.222/31	10.45.34.222 – 10.45.34.223	10.45.34.223
113	10.45.34.224/31	10.45.34.224 – 10.45.34.225	10.45.34.225
114	10.45.34.226/31	10.45.34.226 – 10.45.34.227	10.45.34.227
115	10.45.34.228/31	10.45.34.228 – 10.45.34.229	10.45.34.229
116	10.45.34.230/31	10.45.34.230 – 10.45.34.231	10.45.34.231
117	10.45.34.232/31	10.45.34.232 – 10.45.34.233	10.45.34.233
118	10.45.34.234/31	10.45.34.234 – 10.45.34.235	10.45.34.235
119	10.45.34.236/31	10.45.34.236 – 10.45.34.237	10.45.34.237
120	10.45.34.238/31	10.45.34.238 – 10.45.34.239	10.45.34.239
121	10.45.34.240/31	10.45.34.240 – 10.45.34.241	10.45.34.241
122	10.45.34.242/31	10.45.34.242 – 10.45.34.243	10.45.34.243
123	10.45.34.244/31	10.45.34.244 – 10.45.34.245	10.45.34.245
124	10.45.34.246/31	10.45.34.246 – 10.45.34.247	10.45.34.247
125	10.45.34.248/31	10.45.34.248 – 10.45.34.249	10.45.34.249
126	10.45.34.250/31	10.45.34.250 – 10.45.34.251	10.45.34.251
127	10.45.34.252/31	10.45.34.252 – 10.45.34.253	10.45.34.253
128	10.45.34.254/31	10.45.34.254 – 10.45.34.255	10.45.34.255
129	10.45.35.0/31	10.45.35.0 – 10.45.35.1	10.45.35.1
130	10.45.35.2/31	10.45.35.2 – 10.45.35.3	10.45.35.3
131	10.45.35.4/31	10.45.35.4 – 10.45.35.5	10.45.35.5
132	10.45.35.6/31	10.45.35.6 – 10.45.35.7	10.45.35.7
133	10.45.35.8/31	10.45.35.8 – 10.45.35.9	10.45.35.9
134	10.45.35.10/31	10.45.35.10 – 10.45.35.11	10.45.35.11
135	10.45.35.12/31	10.45.35.12 – 10.45.35.13	10.45.35.13
136	10.45.35.14/31	10.45.35.14 – 10.45.35.15	10.45.35.15
137	10.45.35.16/31	10.45.35.16 – 10.45.35.17	10.45.35.17
138	10.45.35.18/31	10.45.35.18 – 10.45.35.19	10.45.35.19
139	10.45.35.20/31	10.45.35.20 – 10.45.35.21	10.45.35.21
140	10.45.35.22/31	10.45.35.22 – 10.45.35.23	10.45.35.23
141	10.45.35.24/31	10.45.35.24 – 10.45.35.25	10.45.35.25
142	10.45.35.26/31	10.45.35.26 – 10.45.35.27	10.45.35.27
143	10.45.35.28/31	10.45.35.28 – 10.45.35.29	10.45.35.29
144	10.45.35.30/31	10.45.35.30 – 10.45.35.31	10.45.35.31
145	10.45.35.32/31	10.45.35.32 – 10.45.35.33	10.45.35.33
146	10.45.35.34/31	10.45.35.34 – 10.45.35.35	10.45.35.35
147	10.45.35.36/31	10.45.35.36 – 10.45.35.37	10.45.35.37
148	10.45.35.38/31	10.45.35.38 – 10.45.35.39	10.45.35.39
149	10.45.35.40/31	10.45.35.40 – 10.45.35.41	10.45.35.41
150	10.45.35.42/31	10.45.35.42 – 10.45.35.43	10.45.35.43
151	10.45.35.44/31	10.45.35.44 – 10.45.35.45	10.45.35.45
152	10.45.35.46/31	10.45.35.46 – 10.45.35.47	10.45.35.47
153	10.45.35.48/31	10.45.35.48 – 10.45.35.49	10.45.35.49
154	10.45.35.50/31	10.45.35.50 – 10.45.35.51	10.45.35.51
155	10.45.35.52/31	10.45.35.52 – 10.45.35.53	10.45.35.53
156	10.45.35.54/31	10.45.35.54 – 10.45.35.55	10.45.35.55
157	10.45.35.56/31	10.45.35.56 – 10.45.35.57	10.45.35.57
158	10.45.35.58/31	10.45.35.58 – 10.45.35.59	10.45.35.59
159	10.45.35.60/31	10.45.35.60 – 10.45.35.61	10.45.35.61
160	10.45.35.62/31	10.45.35.62 – 10.45.35.63	10.45.35.63
161	10.45.35.64/31	10.45.35.64 – 10.45.35.65	10.45.35.65
162	10.45.35.66/31	10.45.35.66 – 10.45.35.67	10.45.35.67
163	10.45.35.68/31	10.45.35.68 – 10.45.35.69	10.45.35.69
164	10.45.35.70/31	10.45.35.70 – 10.45.35.71	10.45.35.71
165	10.45.35.72/31	10.45.35.72 – 10.45.35.73	10.45.35.73
166	10.45.35.74/31	10.45.35.74 – 10.45.35.75	10.45.35.75
167	10.45.35.76/31	10.45.35.76 – 10.45.35.77	10.45.35.77
168	10.45.35.78/31	10.45.35.78 – 10.45.35.79	10.45.35.79
169	10.45.35.80/31	10.45.35.80 – 10.45.35.81	10.45.35.81
170	10.45.35.82/31	10.45.35.82 – 10.45.35.83	10.45.35.83
171	10.45.35.84/31	10.45.35.84 – 10.45.35.85	10.45.35.85
172	10.45.35.86/31	10.45.35.86 – 10.45.35.87	10.45.35.87
173	10.45.35.88/31	10.45.35.88 – 10.45.35.89	10.45.35.89
174	10.45.35.90/31	10.45.35.90 – 10.45.35.91	10.45.35.91
175	10.45.35.92/31	10.45.35.92 – 10.45.35.93	10.45.35.93
176	10.45.35.94/31	10.45.35.94 – 10.45.35.95	10.45.35.95
177	10.45.35.96/31	10.45.35.96 – 10.45.35.97	10.45.35.97
178	10.45.35.98/31	10.45.35.98 – 10.45.35.99	10.45.35.99
179	10.45.35.100/31	10.45.35.100 – 10.45.35.101	10.45.35.101
180	10.45.35.102/31	10.45.35.102 – 10.45.35.103	10.45.35.103
181	10.45.35.104/31	10.45.35.104 – 10.45.35.105	10.45.35.105
182	10.45.35.106/31	10.45.35.106 – 10.45.35.107	10.45.35.107
183	10.45.35.108/31	10.45.35.108 – 10.45.35.109	10.45.35.109
184	10.45.35.110/31	10.45.35.110 – 10.45.35.111	10.45.35.111
185	10.45.35.112/31	10.45.35.112 – 10.45.35.113	10.45.35.113
186	10.45.35.114/31	10.45.35.114 – 10.45.35.115	10.45.35.115
187	10.45.35.116/31	10.45.35.116 – 10.45.35.117	10.45.35.117
188	10.45.35.118/31	10.45.35.118 – 10.45.35.119	10.45.35.119
189	10.45.35.120/31	10.45.35.120 – 10.45.35.121	10.45.35.121
190	10.45.35.122/31	10.45.35.122 – 10.45.35.123	10.45.35.123
191	10.45.35.124/31	10.45.35.124 – 10.45.35.125	10.45.35.125
192	10.45.35.126/31	10.45.35.126 – 10.45.35.127	10.45.35.127
193	10.45.35.128/31	10.45.35.128 – 10.45.35.129	10.45.35.129
194	10.45.35.130/31	10.45.35.130 – 10.45.35.131	10.45.35.131
195	10.45.35.132/31	10.45.35.132 – 10.45.35.133	10.45.35.133
196	10.45.35.134/31	10.45.35.134 – 10.45.35.135	10.45.35.135
197	10.45.35.136/31	10.45.35.136 – 10.45.35.137	10.45.35.137
198	10.45.35.138/31	10.45.35.138 – 10.45.35.139	10.45.35.139
199	10.45.35.140/31	10.45.35.140 – 10.45.35.141	10.45.35.141
200	10.45.35.142/31	10.45.35.142 – 10.45.35.143	10.45.35.143
201	10.45.35.144/31	10.45.35.144 – 10.45.35.145	10.45.35.145
202	10.45.35.146/31	10.45.35.146 – 10.45.35.147	10.45.35.147
203	10.45.35.148/31	10.45.35.148 – 10.45.35.149	10.45.35.149
204	10.45.35.150/31	10.45.35.150 – 10.45.35.151	10.45.35.151
205	10.45.35.152/31	10.45.35.152 – 10.45.35.153	10.45.35.153
206	10.45.35.154/31	10.45.35.154 – 10.45.35.155	10.45.35.155
207	10.45.35.156/31	10.45.35.156 – 10.45.35.157	10.45.35.157
208	10.45.35.158/31	10.45.35.158 – 10.45.35.159	10.45.35.159
209	10.45.35.160/31	10.45.35.160 – 10.45.35.161	10.45.35.161
210	10.45.35.162/31	10.45.35.162 – 10.45.35.163	10.45.35.163
211	10.45.35.164/31	10.45.35.164 – 10.45.35.165	10.45.35.165
212	10.45.35.166/31	10.45.35.166 – 10.45.35.167	10.45.35.167
213	10.45.35.168/31	10.45.35.168 – 10.45.35.169	10.45.35.169
214	10.45.35.170/31	10.45.35.170 – 10.45.35.171	10.45.35.171
215	10.45.35.172/31	10.45.35.172 – 10.45.35.173	10.45.35.173
216	10.45.35.174/31	10.45.35.174 – 10.45.35.175	10.45.35.175
217	10.45.35.176/31	10.45.35.176 – 10.45.35.177	10.45.35.177
218	10.45.35.178/31	10.45.35.178 – 10.45.35.179	10.45.35.179
219	10.45.35.180/31	10.45.35.180 – 10.45.35.181	10.45.35.181
220	10.45.35.182/31	10.45.35.182 – 10.45.35.183	10.45.35.183
221	10.45.35.184/31	10.45.35.184 – 10.45.35.185	10.45.35.185
222	10.45.35.186/31	10.45.35.186 – 10.45.35.187	10.45.35.187
223	10.45.35.188/31	10.45.35.188 – 10.45.35.189	10.45.35.189
224	10.45.35.190/31	10.45.35.190 – 10.45.35.191	10.45.35.191
225	10.45.35.192/31	10.45.35.192 – 10.45.35.193	10.45.35.193
226	10.45.35.194/31	10.45.35.194 – 10.45.35.195	10.45.35.195
227	10.45.35.196/31	10.45.35.196 – 10.45.35.197	10.45.35.197
228	10.45.35.198/31	10.45.35.198 – 10.45.35.199	10.45.35.199
229	10.45.35.200/31	10.45.35.200 – 10.45.35.201	10.45.35.201
230	10.45.35.202/31	10.45.35.202 – 10.45.35.203	10.45.35.203
231	10.45.35.204/31	10.45.35.204 – 10.45.35.205	10.45.35.205
232	10.45.35.206/31	10.45.35.206 – 10.45.35.207	10.45.35.207
233	10.45.35.208/31	10.45.35.208 – 10.45.35.209	10.45.35.209
234	10.45.35.210/31	10.45.35.210 – 10.45.35.211	10.45.35.211
235	10.45.35.212/31	10.45.35.212 – 10.45.35.213	10.45.35.213
236	10.45.35.214/31	10.45.35.214 – 10.45.35.215	10.45.35.215
237	10.45.35.216/31	10.45.35.216 – 10.45.35.217	10.45.35.217
238	10.45.35.218/31	10.45.35.218 – 10.45.35.219	10.45.35.219
239	10.45.35.220/31	10.45.35.220 – 10.45.35.221	10.45.35.221
240	10.45.35.222/31	10.45.35.222 – 10.45.35.223	10.45.35.223
241	10.45.35.224/31	10.45.35.224 – 10.45.35.225	10.45.35.225
242	10.45.35.226/31	10.45.35.226 – 10.45.35.227	10.45.35.227
243	10.45.35.228/31	10.45.35.228 – 10.45.35.229	10.45.35.229
244	10.45.35.230/31	10.45.35.230 – 10.45.35.231	10.45.35.231
245	10.45.35.232/31	10.45.35.232 – 10.45.35.233	10.45.35.233
246	10.45.35.234/31	10.45.35.234 – 10.45.35.235	10.45.35.235
247	10.45.35.236/31	10.45.35.236 – 10.45.35.237	10.45.35.237
248	10.45.35.238/31	10.45.35.238 – 10.45.35.239	10.45.35.239
249	10.45.35.240/31	10.45.35.240 – 10.45.35.241	10.45.35.241
250	10.45.35.242/31	10.45.35.242 – 10.45.35.243	10.45.35.243
251	10.45.35.244/31	10.45.35.244 – 10.45.35.245	10.45.35.245
252	10.45.35.246/31	10.45.35.246 – 10.45.35.247	10.45.35.247
253	10.45.35.248/31	10.45.35.248 – 10.45.35.249	10.45.35.249
254	10.45.35.250/31	10.45.35.250 – 10.45.35.251	10.45.35.251
255	10.45.35.252/31	10.45.35.252 – 10.45.35.253	10.45.35.253
256	10.45.35.254/31	10.45.35.254 – 10.45.35.255	10.45.35.255

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 →