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)10.45.94.0/23

network10.45.94.0/23

broadcast10.45.95.255

first host10.45.94.1

last host10.45.95.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.45.94.0/23

address00001010.00101101.01011110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00101101.01011110.00000000

broadcast00001010.00101101.01011111.11111111

green = network part, grey = host part

hex0x0a2d5e00

decimal170745344

reverse dns0.94.45.10.in-addr.arpa

ipv4-mapped::ffff:a2d:5e00

/23 split into /32 · 512 subnets

close ×

#	network	host range	broadcast
1	10.45.94.0/32	10.45.94.0 – 10.45.94.0	10.45.94.0
2	10.45.94.1/32	10.45.94.1 – 10.45.94.1	10.45.94.1
3	10.45.94.2/32	10.45.94.2 – 10.45.94.2	10.45.94.2
4	10.45.94.3/32	10.45.94.3 – 10.45.94.3	10.45.94.3
5	10.45.94.4/32	10.45.94.4 – 10.45.94.4	10.45.94.4
6	10.45.94.5/32	10.45.94.5 – 10.45.94.5	10.45.94.5
7	10.45.94.6/32	10.45.94.6 – 10.45.94.6	10.45.94.6
8	10.45.94.7/32	10.45.94.7 – 10.45.94.7	10.45.94.7
9	10.45.94.8/32	10.45.94.8 – 10.45.94.8	10.45.94.8
10	10.45.94.9/32	10.45.94.9 – 10.45.94.9	10.45.94.9
11	10.45.94.10/32	10.45.94.10 – 10.45.94.10	10.45.94.10
12	10.45.94.11/32	10.45.94.11 – 10.45.94.11	10.45.94.11
13	10.45.94.12/32	10.45.94.12 – 10.45.94.12	10.45.94.12
14	10.45.94.13/32	10.45.94.13 – 10.45.94.13	10.45.94.13
15	10.45.94.14/32	10.45.94.14 – 10.45.94.14	10.45.94.14
16	10.45.94.15/32	10.45.94.15 – 10.45.94.15	10.45.94.15
17	10.45.94.16/32	10.45.94.16 – 10.45.94.16	10.45.94.16
18	10.45.94.17/32	10.45.94.17 – 10.45.94.17	10.45.94.17
19	10.45.94.18/32	10.45.94.18 – 10.45.94.18	10.45.94.18
20	10.45.94.19/32	10.45.94.19 – 10.45.94.19	10.45.94.19
21	10.45.94.20/32	10.45.94.20 – 10.45.94.20	10.45.94.20
22	10.45.94.21/32	10.45.94.21 – 10.45.94.21	10.45.94.21
23	10.45.94.22/32	10.45.94.22 – 10.45.94.22	10.45.94.22
24	10.45.94.23/32	10.45.94.23 – 10.45.94.23	10.45.94.23
25	10.45.94.24/32	10.45.94.24 – 10.45.94.24	10.45.94.24
26	10.45.94.25/32	10.45.94.25 – 10.45.94.25	10.45.94.25
27	10.45.94.26/32	10.45.94.26 – 10.45.94.26	10.45.94.26
28	10.45.94.27/32	10.45.94.27 – 10.45.94.27	10.45.94.27
29	10.45.94.28/32	10.45.94.28 – 10.45.94.28	10.45.94.28
30	10.45.94.29/32	10.45.94.29 – 10.45.94.29	10.45.94.29
31	10.45.94.30/32	10.45.94.30 – 10.45.94.30	10.45.94.30
32	10.45.94.31/32	10.45.94.31 – 10.45.94.31	10.45.94.31
33	10.45.94.32/32	10.45.94.32 – 10.45.94.32	10.45.94.32
34	10.45.94.33/32	10.45.94.33 – 10.45.94.33	10.45.94.33
35	10.45.94.34/32	10.45.94.34 – 10.45.94.34	10.45.94.34
36	10.45.94.35/32	10.45.94.35 – 10.45.94.35	10.45.94.35
37	10.45.94.36/32	10.45.94.36 – 10.45.94.36	10.45.94.36
38	10.45.94.37/32	10.45.94.37 – 10.45.94.37	10.45.94.37
39	10.45.94.38/32	10.45.94.38 – 10.45.94.38	10.45.94.38
40	10.45.94.39/32	10.45.94.39 – 10.45.94.39	10.45.94.39
41	10.45.94.40/32	10.45.94.40 – 10.45.94.40	10.45.94.40
42	10.45.94.41/32	10.45.94.41 – 10.45.94.41	10.45.94.41
43	10.45.94.42/32	10.45.94.42 – 10.45.94.42	10.45.94.42
44	10.45.94.43/32	10.45.94.43 – 10.45.94.43	10.45.94.43
45	10.45.94.44/32	10.45.94.44 – 10.45.94.44	10.45.94.44
46	10.45.94.45/32	10.45.94.45 – 10.45.94.45	10.45.94.45
47	10.45.94.46/32	10.45.94.46 – 10.45.94.46	10.45.94.46
48	10.45.94.47/32	10.45.94.47 – 10.45.94.47	10.45.94.47
49	10.45.94.48/32	10.45.94.48 – 10.45.94.48	10.45.94.48
50	10.45.94.49/32	10.45.94.49 – 10.45.94.49	10.45.94.49
51	10.45.94.50/32	10.45.94.50 – 10.45.94.50	10.45.94.50
52	10.45.94.51/32	10.45.94.51 – 10.45.94.51	10.45.94.51
53	10.45.94.52/32	10.45.94.52 – 10.45.94.52	10.45.94.52
54	10.45.94.53/32	10.45.94.53 – 10.45.94.53	10.45.94.53
55	10.45.94.54/32	10.45.94.54 – 10.45.94.54	10.45.94.54
56	10.45.94.55/32	10.45.94.55 – 10.45.94.55	10.45.94.55
57	10.45.94.56/32	10.45.94.56 – 10.45.94.56	10.45.94.56
58	10.45.94.57/32	10.45.94.57 – 10.45.94.57	10.45.94.57
59	10.45.94.58/32	10.45.94.58 – 10.45.94.58	10.45.94.58
60	10.45.94.59/32	10.45.94.59 – 10.45.94.59	10.45.94.59
61	10.45.94.60/32	10.45.94.60 – 10.45.94.60	10.45.94.60
62	10.45.94.61/32	10.45.94.61 – 10.45.94.61	10.45.94.61
63	10.45.94.62/32	10.45.94.62 – 10.45.94.62	10.45.94.62
64	10.45.94.63/32	10.45.94.63 – 10.45.94.63	10.45.94.63
65	10.45.94.64/32	10.45.94.64 – 10.45.94.64	10.45.94.64
66	10.45.94.65/32	10.45.94.65 – 10.45.94.65	10.45.94.65
67	10.45.94.66/32	10.45.94.66 – 10.45.94.66	10.45.94.66
68	10.45.94.67/32	10.45.94.67 – 10.45.94.67	10.45.94.67
69	10.45.94.68/32	10.45.94.68 – 10.45.94.68	10.45.94.68
70	10.45.94.69/32	10.45.94.69 – 10.45.94.69	10.45.94.69
71	10.45.94.70/32	10.45.94.70 – 10.45.94.70	10.45.94.70
72	10.45.94.71/32	10.45.94.71 – 10.45.94.71	10.45.94.71
73	10.45.94.72/32	10.45.94.72 – 10.45.94.72	10.45.94.72
74	10.45.94.73/32	10.45.94.73 – 10.45.94.73	10.45.94.73
75	10.45.94.74/32	10.45.94.74 – 10.45.94.74	10.45.94.74
76	10.45.94.75/32	10.45.94.75 – 10.45.94.75	10.45.94.75
77	10.45.94.76/32	10.45.94.76 – 10.45.94.76	10.45.94.76
78	10.45.94.77/32	10.45.94.77 – 10.45.94.77	10.45.94.77
79	10.45.94.78/32	10.45.94.78 – 10.45.94.78	10.45.94.78
80	10.45.94.79/32	10.45.94.79 – 10.45.94.79	10.45.94.79
81	10.45.94.80/32	10.45.94.80 – 10.45.94.80	10.45.94.80
82	10.45.94.81/32	10.45.94.81 – 10.45.94.81	10.45.94.81
83	10.45.94.82/32	10.45.94.82 – 10.45.94.82	10.45.94.82
84	10.45.94.83/32	10.45.94.83 – 10.45.94.83	10.45.94.83
85	10.45.94.84/32	10.45.94.84 – 10.45.94.84	10.45.94.84
86	10.45.94.85/32	10.45.94.85 – 10.45.94.85	10.45.94.85
87	10.45.94.86/32	10.45.94.86 – 10.45.94.86	10.45.94.86
88	10.45.94.87/32	10.45.94.87 – 10.45.94.87	10.45.94.87
89	10.45.94.88/32	10.45.94.88 – 10.45.94.88	10.45.94.88
90	10.45.94.89/32	10.45.94.89 – 10.45.94.89	10.45.94.89
91	10.45.94.90/32	10.45.94.90 – 10.45.94.90	10.45.94.90
92	10.45.94.91/32	10.45.94.91 – 10.45.94.91	10.45.94.91
93	10.45.94.92/32	10.45.94.92 – 10.45.94.92	10.45.94.92
94	10.45.94.93/32	10.45.94.93 – 10.45.94.93	10.45.94.93
95	10.45.94.94/32	10.45.94.94 – 10.45.94.94	10.45.94.94
96	10.45.94.95/32	10.45.94.95 – 10.45.94.95	10.45.94.95
97	10.45.94.96/32	10.45.94.96 – 10.45.94.96	10.45.94.96
98	10.45.94.97/32	10.45.94.97 – 10.45.94.97	10.45.94.97
99	10.45.94.98/32	10.45.94.98 – 10.45.94.98	10.45.94.98
100	10.45.94.99/32	10.45.94.99 – 10.45.94.99	10.45.94.99
101	10.45.94.100/32	10.45.94.100 – 10.45.94.100	10.45.94.100
102	10.45.94.101/32	10.45.94.101 – 10.45.94.101	10.45.94.101
103	10.45.94.102/32	10.45.94.102 – 10.45.94.102	10.45.94.102
104	10.45.94.103/32	10.45.94.103 – 10.45.94.103	10.45.94.103
105	10.45.94.104/32	10.45.94.104 – 10.45.94.104	10.45.94.104
106	10.45.94.105/32	10.45.94.105 – 10.45.94.105	10.45.94.105
107	10.45.94.106/32	10.45.94.106 – 10.45.94.106	10.45.94.106
108	10.45.94.107/32	10.45.94.107 – 10.45.94.107	10.45.94.107
109	10.45.94.108/32	10.45.94.108 – 10.45.94.108	10.45.94.108
110	10.45.94.109/32	10.45.94.109 – 10.45.94.109	10.45.94.109
111	10.45.94.110/32	10.45.94.110 – 10.45.94.110	10.45.94.110
112	10.45.94.111/32	10.45.94.111 – 10.45.94.111	10.45.94.111
113	10.45.94.112/32	10.45.94.112 – 10.45.94.112	10.45.94.112
114	10.45.94.113/32	10.45.94.113 – 10.45.94.113	10.45.94.113
115	10.45.94.114/32	10.45.94.114 – 10.45.94.114	10.45.94.114
116	10.45.94.115/32	10.45.94.115 – 10.45.94.115	10.45.94.115
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120	10.45.94.119/32	10.45.94.119 – 10.45.94.119	10.45.94.119
121	10.45.94.120/32	10.45.94.120 – 10.45.94.120	10.45.94.120
122	10.45.94.121/32	10.45.94.121 – 10.45.94.121	10.45.94.121
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125	10.45.94.124/32	10.45.94.124 – 10.45.94.124	10.45.94.124
126	10.45.94.125/32	10.45.94.125 – 10.45.94.125	10.45.94.125
127	10.45.94.126/32	10.45.94.126 – 10.45.94.126	10.45.94.126
128	10.45.94.127/32	10.45.94.127 – 10.45.94.127	10.45.94.127
129	10.45.94.128/32	10.45.94.128 – 10.45.94.128	10.45.94.128
130	10.45.94.129/32	10.45.94.129 – 10.45.94.129	10.45.94.129
131	10.45.94.130/32	10.45.94.130 – 10.45.94.130	10.45.94.130
132	10.45.94.131/32	10.45.94.131 – 10.45.94.131	10.45.94.131
133	10.45.94.132/32	10.45.94.132 – 10.45.94.132	10.45.94.132
134	10.45.94.133/32	10.45.94.133 – 10.45.94.133	10.45.94.133
135	10.45.94.134/32	10.45.94.134 – 10.45.94.134	10.45.94.134
136	10.45.94.135/32	10.45.94.135 – 10.45.94.135	10.45.94.135
137	10.45.94.136/32	10.45.94.136 – 10.45.94.136	10.45.94.136
138	10.45.94.137/32	10.45.94.137 – 10.45.94.137	10.45.94.137
139	10.45.94.138/32	10.45.94.138 – 10.45.94.138	10.45.94.138
140	10.45.94.139/32	10.45.94.139 – 10.45.94.139	10.45.94.139
141	10.45.94.140/32	10.45.94.140 – 10.45.94.140	10.45.94.140
142	10.45.94.141/32	10.45.94.141 – 10.45.94.141	10.45.94.141
143	10.45.94.142/32	10.45.94.142 – 10.45.94.142	10.45.94.142
144	10.45.94.143/32	10.45.94.143 – 10.45.94.143	10.45.94.143
145	10.45.94.144/32	10.45.94.144 – 10.45.94.144	10.45.94.144
146	10.45.94.145/32	10.45.94.145 – 10.45.94.145	10.45.94.145
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149	10.45.94.148/32	10.45.94.148 – 10.45.94.148	10.45.94.148
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210	10.45.94.209/32	10.45.94.209 – 10.45.94.209	10.45.94.209
211	10.45.94.210/32	10.45.94.210 – 10.45.94.210	10.45.94.210
212	10.45.94.211/32	10.45.94.211 – 10.45.94.211	10.45.94.211
213	10.45.94.212/32	10.45.94.212 – 10.45.94.212	10.45.94.212
214	10.45.94.213/32	10.45.94.213 – 10.45.94.213	10.45.94.213
215	10.45.94.214/32	10.45.94.214 – 10.45.94.214	10.45.94.214
216	10.45.94.215/32	10.45.94.215 – 10.45.94.215	10.45.94.215
217	10.45.94.216/32	10.45.94.216 – 10.45.94.216	10.45.94.216
218	10.45.94.217/32	10.45.94.217 – 10.45.94.217	10.45.94.217
219	10.45.94.218/32	10.45.94.218 – 10.45.94.218	10.45.94.218
220	10.45.94.219/32	10.45.94.219 – 10.45.94.219	10.45.94.219
221	10.45.94.220/32	10.45.94.220 – 10.45.94.220	10.45.94.220
222	10.45.94.221/32	10.45.94.221 – 10.45.94.221	10.45.94.221
223	10.45.94.222/32	10.45.94.222 – 10.45.94.222	10.45.94.222
224	10.45.94.223/32	10.45.94.223 – 10.45.94.223	10.45.94.223
225	10.45.94.224/32	10.45.94.224 – 10.45.94.224	10.45.94.224
226	10.45.94.225/32	10.45.94.225 – 10.45.94.225	10.45.94.225
227	10.45.94.226/32	10.45.94.226 – 10.45.94.226	10.45.94.226
228	10.45.94.227/32	10.45.94.227 – 10.45.94.227	10.45.94.227
229	10.45.94.228/32	10.45.94.228 – 10.45.94.228	10.45.94.228
230	10.45.94.229/32	10.45.94.229 – 10.45.94.229	10.45.94.229
231	10.45.94.230/32	10.45.94.230 – 10.45.94.230	10.45.94.230
232	10.45.94.231/32	10.45.94.231 – 10.45.94.231	10.45.94.231
233	10.45.94.232/32	10.45.94.232 – 10.45.94.232	10.45.94.232
234	10.45.94.233/32	10.45.94.233 – 10.45.94.233	10.45.94.233
235	10.45.94.234/32	10.45.94.234 – 10.45.94.234	10.45.94.234
236	10.45.94.235/32	10.45.94.235 – 10.45.94.235	10.45.94.235
237	10.45.94.236/32	10.45.94.236 – 10.45.94.236	10.45.94.236
238	10.45.94.237/32	10.45.94.237 – 10.45.94.237	10.45.94.237
239	10.45.94.238/32	10.45.94.238 – 10.45.94.238	10.45.94.238
240	10.45.94.239/32	10.45.94.239 – 10.45.94.239	10.45.94.239
241	10.45.94.240/32	10.45.94.240 – 10.45.94.240	10.45.94.240
242	10.45.94.241/32	10.45.94.241 – 10.45.94.241	10.45.94.241
243	10.45.94.242/32	10.45.94.242 – 10.45.94.242	10.45.94.242
244	10.45.94.243/32	10.45.94.243 – 10.45.94.243	10.45.94.243
245	10.45.94.244/32	10.45.94.244 – 10.45.94.244	10.45.94.244
246	10.45.94.245/32	10.45.94.245 – 10.45.94.245	10.45.94.245
247	10.45.94.246/32	10.45.94.246 – 10.45.94.246	10.45.94.246
248	10.45.94.247/32	10.45.94.247 – 10.45.94.247	10.45.94.247
249	10.45.94.248/32	10.45.94.248 – 10.45.94.248	10.45.94.248
250	10.45.94.249/32	10.45.94.249 – 10.45.94.249	10.45.94.249
251	10.45.94.250/32	10.45.94.250 – 10.45.94.250	10.45.94.250
252	10.45.94.251/32	10.45.94.251 – 10.45.94.251	10.45.94.251
253	10.45.94.252/32	10.45.94.252 – 10.45.94.252	10.45.94.252
254	10.45.94.253/32	10.45.94.253 – 10.45.94.253	10.45.94.253
255	10.45.94.254/32	10.45.94.254 – 10.45.94.254	10.45.94.254
256	10.45.94.255/32	10.45.94.255 – 10.45.94.255	10.45.94.255

showing 256 of 512

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 →