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)10.2.160.0/19

network10.2.160.0/19

broadcast10.2.191.255

first host10.2.160.1

last host10.2.191.254

subnet mask255.255.224.0

wildcard0.0.31.255

addresses8,192

usable hosts8,190

classA

ipcalc 10.2.160.0/19

address00001010.00000010.10100000.00000000

subnet mask11111111.11111111.11100000.00000000

network00001010.00000010.10100000.00000000

broadcast00001010.00000010.10111111.11111111

green = network part, grey = host part

hex0x0a02a000

decimal167944192

reverse dns0.160.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:a000

/19 split into /27 · 256 subnets

close ×

#	network	host range	broadcast
1	10.2.160.0/27	10.2.160.1 – 10.2.160.30	10.2.160.31
2	10.2.160.32/27	10.2.160.33 – 10.2.160.62	10.2.160.63
3	10.2.160.64/27	10.2.160.65 – 10.2.160.94	10.2.160.95
4	10.2.160.96/27	10.2.160.97 – 10.2.160.126	10.2.160.127
5	10.2.160.128/27	10.2.160.129 – 10.2.160.158	10.2.160.159
6	10.2.160.160/27	10.2.160.161 – 10.2.160.190	10.2.160.191
7	10.2.160.192/27	10.2.160.193 – 10.2.160.222	10.2.160.223
8	10.2.160.224/27	10.2.160.225 – 10.2.160.254	10.2.160.255
9	10.2.161.0/27	10.2.161.1 – 10.2.161.30	10.2.161.31
10	10.2.161.32/27	10.2.161.33 – 10.2.161.62	10.2.161.63
11	10.2.161.64/27	10.2.161.65 – 10.2.161.94	10.2.161.95
12	10.2.161.96/27	10.2.161.97 – 10.2.161.126	10.2.161.127
13	10.2.161.128/27	10.2.161.129 – 10.2.161.158	10.2.161.159
14	10.2.161.160/27	10.2.161.161 – 10.2.161.190	10.2.161.191
15	10.2.161.192/27	10.2.161.193 – 10.2.161.222	10.2.161.223
16	10.2.161.224/27	10.2.161.225 – 10.2.161.254	10.2.161.255
17	10.2.162.0/27	10.2.162.1 – 10.2.162.30	10.2.162.31
18	10.2.162.32/27	10.2.162.33 – 10.2.162.62	10.2.162.63
19	10.2.162.64/27	10.2.162.65 – 10.2.162.94	10.2.162.95
20	10.2.162.96/27	10.2.162.97 – 10.2.162.126	10.2.162.127
21	10.2.162.128/27	10.2.162.129 – 10.2.162.158	10.2.162.159
22	10.2.162.160/27	10.2.162.161 – 10.2.162.190	10.2.162.191
23	10.2.162.192/27	10.2.162.193 – 10.2.162.222	10.2.162.223
24	10.2.162.224/27	10.2.162.225 – 10.2.162.254	10.2.162.255
25	10.2.163.0/27	10.2.163.1 – 10.2.163.30	10.2.163.31
26	10.2.163.32/27	10.2.163.33 – 10.2.163.62	10.2.163.63
27	10.2.163.64/27	10.2.163.65 – 10.2.163.94	10.2.163.95
28	10.2.163.96/27	10.2.163.97 – 10.2.163.126	10.2.163.127
29	10.2.163.128/27	10.2.163.129 – 10.2.163.158	10.2.163.159
30	10.2.163.160/27	10.2.163.161 – 10.2.163.190	10.2.163.191
31	10.2.163.192/27	10.2.163.193 – 10.2.163.222	10.2.163.223
32	10.2.163.224/27	10.2.163.225 – 10.2.163.254	10.2.163.255
33	10.2.164.0/27	10.2.164.1 – 10.2.164.30	10.2.164.31
34	10.2.164.32/27	10.2.164.33 – 10.2.164.62	10.2.164.63
35	10.2.164.64/27	10.2.164.65 – 10.2.164.94	10.2.164.95
36	10.2.164.96/27	10.2.164.97 – 10.2.164.126	10.2.164.127
37	10.2.164.128/27	10.2.164.129 – 10.2.164.158	10.2.164.159
38	10.2.164.160/27	10.2.164.161 – 10.2.164.190	10.2.164.191
39	10.2.164.192/27	10.2.164.193 – 10.2.164.222	10.2.164.223
40	10.2.164.224/27	10.2.164.225 – 10.2.164.254	10.2.164.255
41	10.2.165.0/27	10.2.165.1 – 10.2.165.30	10.2.165.31
42	10.2.165.32/27	10.2.165.33 – 10.2.165.62	10.2.165.63
43	10.2.165.64/27	10.2.165.65 – 10.2.165.94	10.2.165.95
44	10.2.165.96/27	10.2.165.97 – 10.2.165.126	10.2.165.127
45	10.2.165.128/27	10.2.165.129 – 10.2.165.158	10.2.165.159
46	10.2.165.160/27	10.2.165.161 – 10.2.165.190	10.2.165.191
47	10.2.165.192/27	10.2.165.193 – 10.2.165.222	10.2.165.223
48	10.2.165.224/27	10.2.165.225 – 10.2.165.254	10.2.165.255
49	10.2.166.0/27	10.2.166.1 – 10.2.166.30	10.2.166.31
50	10.2.166.32/27	10.2.166.33 – 10.2.166.62	10.2.166.63
51	10.2.166.64/27	10.2.166.65 – 10.2.166.94	10.2.166.95
52	10.2.166.96/27	10.2.166.97 – 10.2.166.126	10.2.166.127
53	10.2.166.128/27	10.2.166.129 – 10.2.166.158	10.2.166.159
54	10.2.166.160/27	10.2.166.161 – 10.2.166.190	10.2.166.191
55	10.2.166.192/27	10.2.166.193 – 10.2.166.222	10.2.166.223
56	10.2.166.224/27	10.2.166.225 – 10.2.166.254	10.2.166.255
57	10.2.167.0/27	10.2.167.1 – 10.2.167.30	10.2.167.31
58	10.2.167.32/27	10.2.167.33 – 10.2.167.62	10.2.167.63
59	10.2.167.64/27	10.2.167.65 – 10.2.167.94	10.2.167.95
60	10.2.167.96/27	10.2.167.97 – 10.2.167.126	10.2.167.127
61	10.2.167.128/27	10.2.167.129 – 10.2.167.158	10.2.167.159
62	10.2.167.160/27	10.2.167.161 – 10.2.167.190	10.2.167.191
63	10.2.167.192/27	10.2.167.193 – 10.2.167.222	10.2.167.223
64	10.2.167.224/27	10.2.167.225 – 10.2.167.254	10.2.167.255
65	10.2.168.0/27	10.2.168.1 – 10.2.168.30	10.2.168.31
66	10.2.168.32/27	10.2.168.33 – 10.2.168.62	10.2.168.63
67	10.2.168.64/27	10.2.168.65 – 10.2.168.94	10.2.168.95
68	10.2.168.96/27	10.2.168.97 – 10.2.168.126	10.2.168.127
69	10.2.168.128/27	10.2.168.129 – 10.2.168.158	10.2.168.159
70	10.2.168.160/27	10.2.168.161 – 10.2.168.190	10.2.168.191
71	10.2.168.192/27	10.2.168.193 – 10.2.168.222	10.2.168.223
72	10.2.168.224/27	10.2.168.225 – 10.2.168.254	10.2.168.255
73	10.2.169.0/27	10.2.169.1 – 10.2.169.30	10.2.169.31
74	10.2.169.32/27	10.2.169.33 – 10.2.169.62	10.2.169.63
75	10.2.169.64/27	10.2.169.65 – 10.2.169.94	10.2.169.95
76	10.2.169.96/27	10.2.169.97 – 10.2.169.126	10.2.169.127
77	10.2.169.128/27	10.2.169.129 – 10.2.169.158	10.2.169.159
78	10.2.169.160/27	10.2.169.161 – 10.2.169.190	10.2.169.191
79	10.2.169.192/27	10.2.169.193 – 10.2.169.222	10.2.169.223
80	10.2.169.224/27	10.2.169.225 – 10.2.169.254	10.2.169.255
81	10.2.170.0/27	10.2.170.1 – 10.2.170.30	10.2.170.31
82	10.2.170.32/27	10.2.170.33 – 10.2.170.62	10.2.170.63
83	10.2.170.64/27	10.2.170.65 – 10.2.170.94	10.2.170.95
84	10.2.170.96/27	10.2.170.97 – 10.2.170.126	10.2.170.127
85	10.2.170.128/27	10.2.170.129 – 10.2.170.158	10.2.170.159
86	10.2.170.160/27	10.2.170.161 – 10.2.170.190	10.2.170.191
87	10.2.170.192/27	10.2.170.193 – 10.2.170.222	10.2.170.223
88	10.2.170.224/27	10.2.170.225 – 10.2.170.254	10.2.170.255
89	10.2.171.0/27	10.2.171.1 – 10.2.171.30	10.2.171.31
90	10.2.171.32/27	10.2.171.33 – 10.2.171.62	10.2.171.63
91	10.2.171.64/27	10.2.171.65 – 10.2.171.94	10.2.171.95
92	10.2.171.96/27	10.2.171.97 – 10.2.171.126	10.2.171.127
93	10.2.171.128/27	10.2.171.129 – 10.2.171.158	10.2.171.159
94	10.2.171.160/27	10.2.171.161 – 10.2.171.190	10.2.171.191
95	10.2.171.192/27	10.2.171.193 – 10.2.171.222	10.2.171.223
96	10.2.171.224/27	10.2.171.225 – 10.2.171.254	10.2.171.255
97	10.2.172.0/27	10.2.172.1 – 10.2.172.30	10.2.172.31
98	10.2.172.32/27	10.2.172.33 – 10.2.172.62	10.2.172.63
99	10.2.172.64/27	10.2.172.65 – 10.2.172.94	10.2.172.95
100	10.2.172.96/27	10.2.172.97 – 10.2.172.126	10.2.172.127
101	10.2.172.128/27	10.2.172.129 – 10.2.172.158	10.2.172.159
102	10.2.172.160/27	10.2.172.161 – 10.2.172.190	10.2.172.191
103	10.2.172.192/27	10.2.172.193 – 10.2.172.222	10.2.172.223
104	10.2.172.224/27	10.2.172.225 – 10.2.172.254	10.2.172.255
105	10.2.173.0/27	10.2.173.1 – 10.2.173.30	10.2.173.31
106	10.2.173.32/27	10.2.173.33 – 10.2.173.62	10.2.173.63
107	10.2.173.64/27	10.2.173.65 – 10.2.173.94	10.2.173.95
108	10.2.173.96/27	10.2.173.97 – 10.2.173.126	10.2.173.127
109	10.2.173.128/27	10.2.173.129 – 10.2.173.158	10.2.173.159
110	10.2.173.160/27	10.2.173.161 – 10.2.173.190	10.2.173.191
111	10.2.173.192/27	10.2.173.193 – 10.2.173.222	10.2.173.223
112	10.2.173.224/27	10.2.173.225 – 10.2.173.254	10.2.173.255
113	10.2.174.0/27	10.2.174.1 – 10.2.174.30	10.2.174.31
114	10.2.174.32/27	10.2.174.33 – 10.2.174.62	10.2.174.63
115	10.2.174.64/27	10.2.174.65 – 10.2.174.94	10.2.174.95
116	10.2.174.96/27	10.2.174.97 – 10.2.174.126	10.2.174.127
117	10.2.174.128/27	10.2.174.129 – 10.2.174.158	10.2.174.159
118	10.2.174.160/27	10.2.174.161 – 10.2.174.190	10.2.174.191
119	10.2.174.192/27	10.2.174.193 – 10.2.174.222	10.2.174.223
120	10.2.174.224/27	10.2.174.225 – 10.2.174.254	10.2.174.255
121	10.2.175.0/27	10.2.175.1 – 10.2.175.30	10.2.175.31
122	10.2.175.32/27	10.2.175.33 – 10.2.175.62	10.2.175.63
123	10.2.175.64/27	10.2.175.65 – 10.2.175.94	10.2.175.95
124	10.2.175.96/27	10.2.175.97 – 10.2.175.126	10.2.175.127
125	10.2.175.128/27	10.2.175.129 – 10.2.175.158	10.2.175.159
126	10.2.175.160/27	10.2.175.161 – 10.2.175.190	10.2.175.191
127	10.2.175.192/27	10.2.175.193 – 10.2.175.222	10.2.175.223
128	10.2.175.224/27	10.2.175.225 – 10.2.175.254	10.2.175.255
129	10.2.176.0/27	10.2.176.1 – 10.2.176.30	10.2.176.31
130	10.2.176.32/27	10.2.176.33 – 10.2.176.62	10.2.176.63
131	10.2.176.64/27	10.2.176.65 – 10.2.176.94	10.2.176.95
132	10.2.176.96/27	10.2.176.97 – 10.2.176.126	10.2.176.127
133	10.2.176.128/27	10.2.176.129 – 10.2.176.158	10.2.176.159
134	10.2.176.160/27	10.2.176.161 – 10.2.176.190	10.2.176.191
135	10.2.176.192/27	10.2.176.193 – 10.2.176.222	10.2.176.223
136	10.2.176.224/27	10.2.176.225 – 10.2.176.254	10.2.176.255
137	10.2.177.0/27	10.2.177.1 – 10.2.177.30	10.2.177.31
138	10.2.177.32/27	10.2.177.33 – 10.2.177.62	10.2.177.63
139	10.2.177.64/27	10.2.177.65 – 10.2.177.94	10.2.177.95
140	10.2.177.96/27	10.2.177.97 – 10.2.177.126	10.2.177.127
141	10.2.177.128/27	10.2.177.129 – 10.2.177.158	10.2.177.159
142	10.2.177.160/27	10.2.177.161 – 10.2.177.190	10.2.177.191
143	10.2.177.192/27	10.2.177.193 – 10.2.177.222	10.2.177.223
144	10.2.177.224/27	10.2.177.225 – 10.2.177.254	10.2.177.255
145	10.2.178.0/27	10.2.178.1 – 10.2.178.30	10.2.178.31
146	10.2.178.32/27	10.2.178.33 – 10.2.178.62	10.2.178.63
147	10.2.178.64/27	10.2.178.65 – 10.2.178.94	10.2.178.95
148	10.2.178.96/27	10.2.178.97 – 10.2.178.126	10.2.178.127
149	10.2.178.128/27	10.2.178.129 – 10.2.178.158	10.2.178.159
150	10.2.178.160/27	10.2.178.161 – 10.2.178.190	10.2.178.191
151	10.2.178.192/27	10.2.178.193 – 10.2.178.222	10.2.178.223
152	10.2.178.224/27	10.2.178.225 – 10.2.178.254	10.2.178.255
153	10.2.179.0/27	10.2.179.1 – 10.2.179.30	10.2.179.31
154	10.2.179.32/27	10.2.179.33 – 10.2.179.62	10.2.179.63
155	10.2.179.64/27	10.2.179.65 – 10.2.179.94	10.2.179.95
156	10.2.179.96/27	10.2.179.97 – 10.2.179.126	10.2.179.127
157	10.2.179.128/27	10.2.179.129 – 10.2.179.158	10.2.179.159
158	10.2.179.160/27	10.2.179.161 – 10.2.179.190	10.2.179.191
159	10.2.179.192/27	10.2.179.193 – 10.2.179.222	10.2.179.223
160	10.2.179.224/27	10.2.179.225 – 10.2.179.254	10.2.179.255
161	10.2.180.0/27	10.2.180.1 – 10.2.180.30	10.2.180.31
162	10.2.180.32/27	10.2.180.33 – 10.2.180.62	10.2.180.63
163	10.2.180.64/27	10.2.180.65 – 10.2.180.94	10.2.180.95
164	10.2.180.96/27	10.2.180.97 – 10.2.180.126	10.2.180.127
165	10.2.180.128/27	10.2.180.129 – 10.2.180.158	10.2.180.159
166	10.2.180.160/27	10.2.180.161 – 10.2.180.190	10.2.180.191
167	10.2.180.192/27	10.2.180.193 – 10.2.180.222	10.2.180.223
168	10.2.180.224/27	10.2.180.225 – 10.2.180.254	10.2.180.255
169	10.2.181.0/27	10.2.181.1 – 10.2.181.30	10.2.181.31
170	10.2.181.32/27	10.2.181.33 – 10.2.181.62	10.2.181.63
171	10.2.181.64/27	10.2.181.65 – 10.2.181.94	10.2.181.95
172	10.2.181.96/27	10.2.181.97 – 10.2.181.126	10.2.181.127
173	10.2.181.128/27	10.2.181.129 – 10.2.181.158	10.2.181.159
174	10.2.181.160/27	10.2.181.161 – 10.2.181.190	10.2.181.191
175	10.2.181.192/27	10.2.181.193 – 10.2.181.222	10.2.181.223
176	10.2.181.224/27	10.2.181.225 – 10.2.181.254	10.2.181.255
177	10.2.182.0/27	10.2.182.1 – 10.2.182.30	10.2.182.31
178	10.2.182.32/27	10.2.182.33 – 10.2.182.62	10.2.182.63
179	10.2.182.64/27	10.2.182.65 – 10.2.182.94	10.2.182.95
180	10.2.182.96/27	10.2.182.97 – 10.2.182.126	10.2.182.127
181	10.2.182.128/27	10.2.182.129 – 10.2.182.158	10.2.182.159
182	10.2.182.160/27	10.2.182.161 – 10.2.182.190	10.2.182.191
183	10.2.182.192/27	10.2.182.193 – 10.2.182.222	10.2.182.223
184	10.2.182.224/27	10.2.182.225 – 10.2.182.254	10.2.182.255
185	10.2.183.0/27	10.2.183.1 – 10.2.183.30	10.2.183.31
186	10.2.183.32/27	10.2.183.33 – 10.2.183.62	10.2.183.63
187	10.2.183.64/27	10.2.183.65 – 10.2.183.94	10.2.183.95
188	10.2.183.96/27	10.2.183.97 – 10.2.183.126	10.2.183.127
189	10.2.183.128/27	10.2.183.129 – 10.2.183.158	10.2.183.159
190	10.2.183.160/27	10.2.183.161 – 10.2.183.190	10.2.183.191
191	10.2.183.192/27	10.2.183.193 – 10.2.183.222	10.2.183.223
192	10.2.183.224/27	10.2.183.225 – 10.2.183.254	10.2.183.255
193	10.2.184.0/27	10.2.184.1 – 10.2.184.30	10.2.184.31
194	10.2.184.32/27	10.2.184.33 – 10.2.184.62	10.2.184.63
195	10.2.184.64/27	10.2.184.65 – 10.2.184.94	10.2.184.95
196	10.2.184.96/27	10.2.184.97 – 10.2.184.126	10.2.184.127
197	10.2.184.128/27	10.2.184.129 – 10.2.184.158	10.2.184.159
198	10.2.184.160/27	10.2.184.161 – 10.2.184.190	10.2.184.191
199	10.2.184.192/27	10.2.184.193 – 10.2.184.222	10.2.184.223
200	10.2.184.224/27	10.2.184.225 – 10.2.184.254	10.2.184.255
201	10.2.185.0/27	10.2.185.1 – 10.2.185.30	10.2.185.31
202	10.2.185.32/27	10.2.185.33 – 10.2.185.62	10.2.185.63
203	10.2.185.64/27	10.2.185.65 – 10.2.185.94	10.2.185.95
204	10.2.185.96/27	10.2.185.97 – 10.2.185.126	10.2.185.127
205	10.2.185.128/27	10.2.185.129 – 10.2.185.158	10.2.185.159
206	10.2.185.160/27	10.2.185.161 – 10.2.185.190	10.2.185.191
207	10.2.185.192/27	10.2.185.193 – 10.2.185.222	10.2.185.223
208	10.2.185.224/27	10.2.185.225 – 10.2.185.254	10.2.185.255
209	10.2.186.0/27	10.2.186.1 – 10.2.186.30	10.2.186.31
210	10.2.186.32/27	10.2.186.33 – 10.2.186.62	10.2.186.63
211	10.2.186.64/27	10.2.186.65 – 10.2.186.94	10.2.186.95
212	10.2.186.96/27	10.2.186.97 – 10.2.186.126	10.2.186.127
213	10.2.186.128/27	10.2.186.129 – 10.2.186.158	10.2.186.159
214	10.2.186.160/27	10.2.186.161 – 10.2.186.190	10.2.186.191
215	10.2.186.192/27	10.2.186.193 – 10.2.186.222	10.2.186.223
216	10.2.186.224/27	10.2.186.225 – 10.2.186.254	10.2.186.255
217	10.2.187.0/27	10.2.187.1 – 10.2.187.30	10.2.187.31
218	10.2.187.32/27	10.2.187.33 – 10.2.187.62	10.2.187.63
219	10.2.187.64/27	10.2.187.65 – 10.2.187.94	10.2.187.95
220	10.2.187.96/27	10.2.187.97 – 10.2.187.126	10.2.187.127
221	10.2.187.128/27	10.2.187.129 – 10.2.187.158	10.2.187.159
222	10.2.187.160/27	10.2.187.161 – 10.2.187.190	10.2.187.191
223	10.2.187.192/27	10.2.187.193 – 10.2.187.222	10.2.187.223
224	10.2.187.224/27	10.2.187.225 – 10.2.187.254	10.2.187.255
225	10.2.188.0/27	10.2.188.1 – 10.2.188.30	10.2.188.31
226	10.2.188.32/27	10.2.188.33 – 10.2.188.62	10.2.188.63
227	10.2.188.64/27	10.2.188.65 – 10.2.188.94	10.2.188.95
228	10.2.188.96/27	10.2.188.97 – 10.2.188.126	10.2.188.127
229	10.2.188.128/27	10.2.188.129 – 10.2.188.158	10.2.188.159
230	10.2.188.160/27	10.2.188.161 – 10.2.188.190	10.2.188.191
231	10.2.188.192/27	10.2.188.193 – 10.2.188.222	10.2.188.223
232	10.2.188.224/27	10.2.188.225 – 10.2.188.254	10.2.188.255
233	10.2.189.0/27	10.2.189.1 – 10.2.189.30	10.2.189.31
234	10.2.189.32/27	10.2.189.33 – 10.2.189.62	10.2.189.63
235	10.2.189.64/27	10.2.189.65 – 10.2.189.94	10.2.189.95
236	10.2.189.96/27	10.2.189.97 – 10.2.189.126	10.2.189.127
237	10.2.189.128/27	10.2.189.129 – 10.2.189.158	10.2.189.159
238	10.2.189.160/27	10.2.189.161 – 10.2.189.190	10.2.189.191
239	10.2.189.192/27	10.2.189.193 – 10.2.189.222	10.2.189.223
240	10.2.189.224/27	10.2.189.225 – 10.2.189.254	10.2.189.255
241	10.2.190.0/27	10.2.190.1 – 10.2.190.30	10.2.190.31
242	10.2.190.32/27	10.2.190.33 – 10.2.190.62	10.2.190.63
243	10.2.190.64/27	10.2.190.65 – 10.2.190.94	10.2.190.95
244	10.2.190.96/27	10.2.190.97 – 10.2.190.126	10.2.190.127
245	10.2.190.128/27	10.2.190.129 – 10.2.190.158	10.2.190.159
246	10.2.190.160/27	10.2.190.161 – 10.2.190.190	10.2.190.191
247	10.2.190.192/27	10.2.190.193 – 10.2.190.222	10.2.190.223
248	10.2.190.224/27	10.2.190.225 – 10.2.190.254	10.2.190.255
249	10.2.191.0/27	10.2.191.1 – 10.2.191.30	10.2.191.31
250	10.2.191.32/27	10.2.191.33 – 10.2.191.62	10.2.191.63
251	10.2.191.64/27	10.2.191.65 – 10.2.191.94	10.2.191.95
252	10.2.191.96/27	10.2.191.97 – 10.2.191.126	10.2.191.127
253	10.2.191.128/27	10.2.191.129 – 10.2.191.158	10.2.191.159
254	10.2.191.160/27	10.2.191.161 – 10.2.191.190	10.2.191.191
255	10.2.191.192/27	10.2.191.193 – 10.2.191.222	10.2.191.223
256	10.2.191.224/27	10.2.191.225 – 10.2.191.254	10.2.191.255

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 /19
/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	1
/20	255.255.240.0	4,096	4,094	2 split →
/21	255.255.248.0	2,048	2,046	4 split →
/22	255.255.252.0	1,024	1,022	8 split →
/23	255.255.254.0	512	510	16 split →
/24	255.255.255.0	256	254	32 split →
/25	255.255.255.128	128	126	64 split →
/26	255.255.255.192	64	62	128 split →
/27	255.255.255.224	32	30	256 split →
/28	255.255.255.240	16	14	512 split →
/29	255.255.255.248	8	6	1,024 split →
/30	255.255.255.252	4	2	2,048 split →
/31	255.255.255.254	2	2	4,096 split →
/32	255.255.255.255	1	1	8,192 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 →