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)10.24.0.0/16

network10.24.0.0/16

broadcast10.24.255.255

first host10.24.0.1

last host10.24.255.254

subnet mask255.255.0.0

wildcard0.0.255.255

addresses65,536

usable hosts65,534

classA

ipcalc 10.24.0.0/16

address00001010.00011000.00000000.00000000

subnet mask11111111.11111111.00000000.00000000

network00001010.00011000.00000000.00000000

broadcast00001010.00011000.11111111.11111111

green = network part, grey = host part

hex0x0a180000

decimal169345024

reverse dns0.0.24.10.in-addr.arpa

ipv4-mapped::ffff:a18:0

/16 split into /24 · 256 subnets

close ×

#	network	host range	broadcast
1	10.24.0.0/24	10.24.0.1 – 10.24.0.254	10.24.0.255
2	10.24.1.0/24	10.24.1.1 – 10.24.1.254	10.24.1.255
3	10.24.2.0/24	10.24.2.1 – 10.24.2.254	10.24.2.255
4	10.24.3.0/24	10.24.3.1 – 10.24.3.254	10.24.3.255
5	10.24.4.0/24	10.24.4.1 – 10.24.4.254	10.24.4.255
6	10.24.5.0/24	10.24.5.1 – 10.24.5.254	10.24.5.255
7	10.24.6.0/24	10.24.6.1 – 10.24.6.254	10.24.6.255
8	10.24.7.0/24	10.24.7.1 – 10.24.7.254	10.24.7.255
9	10.24.8.0/24	10.24.8.1 – 10.24.8.254	10.24.8.255
10	10.24.9.0/24	10.24.9.1 – 10.24.9.254	10.24.9.255
11	10.24.10.0/24	10.24.10.1 – 10.24.10.254	10.24.10.255
12	10.24.11.0/24	10.24.11.1 – 10.24.11.254	10.24.11.255
13	10.24.12.0/24	10.24.12.1 – 10.24.12.254	10.24.12.255
14	10.24.13.0/24	10.24.13.1 – 10.24.13.254	10.24.13.255
15	10.24.14.0/24	10.24.14.1 – 10.24.14.254	10.24.14.255
16	10.24.15.0/24	10.24.15.1 – 10.24.15.254	10.24.15.255
17	10.24.16.0/24	10.24.16.1 – 10.24.16.254	10.24.16.255
18	10.24.17.0/24	10.24.17.1 – 10.24.17.254	10.24.17.255
19	10.24.18.0/24	10.24.18.1 – 10.24.18.254	10.24.18.255
20	10.24.19.0/24	10.24.19.1 – 10.24.19.254	10.24.19.255
21	10.24.20.0/24	10.24.20.1 – 10.24.20.254	10.24.20.255
22	10.24.21.0/24	10.24.21.1 – 10.24.21.254	10.24.21.255
23	10.24.22.0/24	10.24.22.1 – 10.24.22.254	10.24.22.255
24	10.24.23.0/24	10.24.23.1 – 10.24.23.254	10.24.23.255
25	10.24.24.0/24	10.24.24.1 – 10.24.24.254	10.24.24.255
26	10.24.25.0/24	10.24.25.1 – 10.24.25.254	10.24.25.255
27	10.24.26.0/24	10.24.26.1 – 10.24.26.254	10.24.26.255
28	10.24.27.0/24	10.24.27.1 – 10.24.27.254	10.24.27.255
29	10.24.28.0/24	10.24.28.1 – 10.24.28.254	10.24.28.255
30	10.24.29.0/24	10.24.29.1 – 10.24.29.254	10.24.29.255
31	10.24.30.0/24	10.24.30.1 – 10.24.30.254	10.24.30.255
32	10.24.31.0/24	10.24.31.1 – 10.24.31.254	10.24.31.255
33	10.24.32.0/24	10.24.32.1 – 10.24.32.254	10.24.32.255
34	10.24.33.0/24	10.24.33.1 – 10.24.33.254	10.24.33.255
35	10.24.34.0/24	10.24.34.1 – 10.24.34.254	10.24.34.255
36	10.24.35.0/24	10.24.35.1 – 10.24.35.254	10.24.35.255
37	10.24.36.0/24	10.24.36.1 – 10.24.36.254	10.24.36.255
38	10.24.37.0/24	10.24.37.1 – 10.24.37.254	10.24.37.255
39	10.24.38.0/24	10.24.38.1 – 10.24.38.254	10.24.38.255
40	10.24.39.0/24	10.24.39.1 – 10.24.39.254	10.24.39.255
41	10.24.40.0/24	10.24.40.1 – 10.24.40.254	10.24.40.255
42	10.24.41.0/24	10.24.41.1 – 10.24.41.254	10.24.41.255
43	10.24.42.0/24	10.24.42.1 – 10.24.42.254	10.24.42.255
44	10.24.43.0/24	10.24.43.1 – 10.24.43.254	10.24.43.255
45	10.24.44.0/24	10.24.44.1 – 10.24.44.254	10.24.44.255
46	10.24.45.0/24	10.24.45.1 – 10.24.45.254	10.24.45.255
47	10.24.46.0/24	10.24.46.1 – 10.24.46.254	10.24.46.255
48	10.24.47.0/24	10.24.47.1 – 10.24.47.254	10.24.47.255
49	10.24.48.0/24	10.24.48.1 – 10.24.48.254	10.24.48.255
50	10.24.49.0/24	10.24.49.1 – 10.24.49.254	10.24.49.255
51	10.24.50.0/24	10.24.50.1 – 10.24.50.254	10.24.50.255
52	10.24.51.0/24	10.24.51.1 – 10.24.51.254	10.24.51.255
53	10.24.52.0/24	10.24.52.1 – 10.24.52.254	10.24.52.255
54	10.24.53.0/24	10.24.53.1 – 10.24.53.254	10.24.53.255
55	10.24.54.0/24	10.24.54.1 – 10.24.54.254	10.24.54.255
56	10.24.55.0/24	10.24.55.1 – 10.24.55.254	10.24.55.255
57	10.24.56.0/24	10.24.56.1 – 10.24.56.254	10.24.56.255
58	10.24.57.0/24	10.24.57.1 – 10.24.57.254	10.24.57.255
59	10.24.58.0/24	10.24.58.1 – 10.24.58.254	10.24.58.255
60	10.24.59.0/24	10.24.59.1 – 10.24.59.254	10.24.59.255
61	10.24.60.0/24	10.24.60.1 – 10.24.60.254	10.24.60.255
62	10.24.61.0/24	10.24.61.1 – 10.24.61.254	10.24.61.255
63	10.24.62.0/24	10.24.62.1 – 10.24.62.254	10.24.62.255
64	10.24.63.0/24	10.24.63.1 – 10.24.63.254	10.24.63.255
65	10.24.64.0/24	10.24.64.1 – 10.24.64.254	10.24.64.255
66	10.24.65.0/24	10.24.65.1 – 10.24.65.254	10.24.65.255
67	10.24.66.0/24	10.24.66.1 – 10.24.66.254	10.24.66.255
68	10.24.67.0/24	10.24.67.1 – 10.24.67.254	10.24.67.255
69	10.24.68.0/24	10.24.68.1 – 10.24.68.254	10.24.68.255
70	10.24.69.0/24	10.24.69.1 – 10.24.69.254	10.24.69.255
71	10.24.70.0/24	10.24.70.1 – 10.24.70.254	10.24.70.255
72	10.24.71.0/24	10.24.71.1 – 10.24.71.254	10.24.71.255
73	10.24.72.0/24	10.24.72.1 – 10.24.72.254	10.24.72.255
74	10.24.73.0/24	10.24.73.1 – 10.24.73.254	10.24.73.255
75	10.24.74.0/24	10.24.74.1 – 10.24.74.254	10.24.74.255
76	10.24.75.0/24	10.24.75.1 – 10.24.75.254	10.24.75.255
77	10.24.76.0/24	10.24.76.1 – 10.24.76.254	10.24.76.255
78	10.24.77.0/24	10.24.77.1 – 10.24.77.254	10.24.77.255
79	10.24.78.0/24	10.24.78.1 – 10.24.78.254	10.24.78.255
80	10.24.79.0/24	10.24.79.1 – 10.24.79.254	10.24.79.255
81	10.24.80.0/24	10.24.80.1 – 10.24.80.254	10.24.80.255
82	10.24.81.0/24	10.24.81.1 – 10.24.81.254	10.24.81.255
83	10.24.82.0/24	10.24.82.1 – 10.24.82.254	10.24.82.255
84	10.24.83.0/24	10.24.83.1 – 10.24.83.254	10.24.83.255
85	10.24.84.0/24	10.24.84.1 – 10.24.84.254	10.24.84.255
86	10.24.85.0/24	10.24.85.1 – 10.24.85.254	10.24.85.255
87	10.24.86.0/24	10.24.86.1 – 10.24.86.254	10.24.86.255
88	10.24.87.0/24	10.24.87.1 – 10.24.87.254	10.24.87.255
89	10.24.88.0/24	10.24.88.1 – 10.24.88.254	10.24.88.255
90	10.24.89.0/24	10.24.89.1 – 10.24.89.254	10.24.89.255
91	10.24.90.0/24	10.24.90.1 – 10.24.90.254	10.24.90.255
92	10.24.91.0/24	10.24.91.1 – 10.24.91.254	10.24.91.255
93	10.24.92.0/24	10.24.92.1 – 10.24.92.254	10.24.92.255
94	10.24.93.0/24	10.24.93.1 – 10.24.93.254	10.24.93.255
95	10.24.94.0/24	10.24.94.1 – 10.24.94.254	10.24.94.255
96	10.24.95.0/24	10.24.95.1 – 10.24.95.254	10.24.95.255
97	10.24.96.0/24	10.24.96.1 – 10.24.96.254	10.24.96.255
98	10.24.97.0/24	10.24.97.1 – 10.24.97.254	10.24.97.255
99	10.24.98.0/24	10.24.98.1 – 10.24.98.254	10.24.98.255
100	10.24.99.0/24	10.24.99.1 – 10.24.99.254	10.24.99.255
101	10.24.100.0/24	10.24.100.1 – 10.24.100.254	10.24.100.255
102	10.24.101.0/24	10.24.101.1 – 10.24.101.254	10.24.101.255
103	10.24.102.0/24	10.24.102.1 – 10.24.102.254	10.24.102.255
104	10.24.103.0/24	10.24.103.1 – 10.24.103.254	10.24.103.255
105	10.24.104.0/24	10.24.104.1 – 10.24.104.254	10.24.104.255
106	10.24.105.0/24	10.24.105.1 – 10.24.105.254	10.24.105.255
107	10.24.106.0/24	10.24.106.1 – 10.24.106.254	10.24.106.255
108	10.24.107.0/24	10.24.107.1 – 10.24.107.254	10.24.107.255
109	10.24.108.0/24	10.24.108.1 – 10.24.108.254	10.24.108.255
110	10.24.109.0/24	10.24.109.1 – 10.24.109.254	10.24.109.255
111	10.24.110.0/24	10.24.110.1 – 10.24.110.254	10.24.110.255
112	10.24.111.0/24	10.24.111.1 – 10.24.111.254	10.24.111.255
113	10.24.112.0/24	10.24.112.1 – 10.24.112.254	10.24.112.255
114	10.24.113.0/24	10.24.113.1 – 10.24.113.254	10.24.113.255
115	10.24.114.0/24	10.24.114.1 – 10.24.114.254	10.24.114.255
116	10.24.115.0/24	10.24.115.1 – 10.24.115.254	10.24.115.255
117	10.24.116.0/24	10.24.116.1 – 10.24.116.254	10.24.116.255
118	10.24.117.0/24	10.24.117.1 – 10.24.117.254	10.24.117.255
119	10.24.118.0/24	10.24.118.1 – 10.24.118.254	10.24.118.255
120	10.24.119.0/24	10.24.119.1 – 10.24.119.254	10.24.119.255
121	10.24.120.0/24	10.24.120.1 – 10.24.120.254	10.24.120.255
122	10.24.121.0/24	10.24.121.1 – 10.24.121.254	10.24.121.255
123	10.24.122.0/24	10.24.122.1 – 10.24.122.254	10.24.122.255
124	10.24.123.0/24	10.24.123.1 – 10.24.123.254	10.24.123.255
125	10.24.124.0/24	10.24.124.1 – 10.24.124.254	10.24.124.255
126	10.24.125.0/24	10.24.125.1 – 10.24.125.254	10.24.125.255
127	10.24.126.0/24	10.24.126.1 – 10.24.126.254	10.24.126.255
128	10.24.127.0/24	10.24.127.1 – 10.24.127.254	10.24.127.255
129	10.24.128.0/24	10.24.128.1 – 10.24.128.254	10.24.128.255
130	10.24.129.0/24	10.24.129.1 – 10.24.129.254	10.24.129.255
131	10.24.130.0/24	10.24.130.1 – 10.24.130.254	10.24.130.255
132	10.24.131.0/24	10.24.131.1 – 10.24.131.254	10.24.131.255
133	10.24.132.0/24	10.24.132.1 – 10.24.132.254	10.24.132.255
134	10.24.133.0/24	10.24.133.1 – 10.24.133.254	10.24.133.255
135	10.24.134.0/24	10.24.134.1 – 10.24.134.254	10.24.134.255
136	10.24.135.0/24	10.24.135.1 – 10.24.135.254	10.24.135.255
137	10.24.136.0/24	10.24.136.1 – 10.24.136.254	10.24.136.255
138	10.24.137.0/24	10.24.137.1 – 10.24.137.254	10.24.137.255
139	10.24.138.0/24	10.24.138.1 – 10.24.138.254	10.24.138.255
140	10.24.139.0/24	10.24.139.1 – 10.24.139.254	10.24.139.255
141	10.24.140.0/24	10.24.140.1 – 10.24.140.254	10.24.140.255
142	10.24.141.0/24	10.24.141.1 – 10.24.141.254	10.24.141.255
143	10.24.142.0/24	10.24.142.1 – 10.24.142.254	10.24.142.255
144	10.24.143.0/24	10.24.143.1 – 10.24.143.254	10.24.143.255
145	10.24.144.0/24	10.24.144.1 – 10.24.144.254	10.24.144.255
146	10.24.145.0/24	10.24.145.1 – 10.24.145.254	10.24.145.255
147	10.24.146.0/24	10.24.146.1 – 10.24.146.254	10.24.146.255
148	10.24.147.0/24	10.24.147.1 – 10.24.147.254	10.24.147.255
149	10.24.148.0/24	10.24.148.1 – 10.24.148.254	10.24.148.255
150	10.24.149.0/24	10.24.149.1 – 10.24.149.254	10.24.149.255
151	10.24.150.0/24	10.24.150.1 – 10.24.150.254	10.24.150.255
152	10.24.151.0/24	10.24.151.1 – 10.24.151.254	10.24.151.255
153	10.24.152.0/24	10.24.152.1 – 10.24.152.254	10.24.152.255
154	10.24.153.0/24	10.24.153.1 – 10.24.153.254	10.24.153.255
155	10.24.154.0/24	10.24.154.1 – 10.24.154.254	10.24.154.255
156	10.24.155.0/24	10.24.155.1 – 10.24.155.254	10.24.155.255
157	10.24.156.0/24	10.24.156.1 – 10.24.156.254	10.24.156.255
158	10.24.157.0/24	10.24.157.1 – 10.24.157.254	10.24.157.255
159	10.24.158.0/24	10.24.158.1 – 10.24.158.254	10.24.158.255
160	10.24.159.0/24	10.24.159.1 – 10.24.159.254	10.24.159.255
161	10.24.160.0/24	10.24.160.1 – 10.24.160.254	10.24.160.255
162	10.24.161.0/24	10.24.161.1 – 10.24.161.254	10.24.161.255
163	10.24.162.0/24	10.24.162.1 – 10.24.162.254	10.24.162.255
164	10.24.163.0/24	10.24.163.1 – 10.24.163.254	10.24.163.255
165	10.24.164.0/24	10.24.164.1 – 10.24.164.254	10.24.164.255
166	10.24.165.0/24	10.24.165.1 – 10.24.165.254	10.24.165.255
167	10.24.166.0/24	10.24.166.1 – 10.24.166.254	10.24.166.255
168	10.24.167.0/24	10.24.167.1 – 10.24.167.254	10.24.167.255
169	10.24.168.0/24	10.24.168.1 – 10.24.168.254	10.24.168.255
170	10.24.169.0/24	10.24.169.1 – 10.24.169.254	10.24.169.255
171	10.24.170.0/24	10.24.170.1 – 10.24.170.254	10.24.170.255
172	10.24.171.0/24	10.24.171.1 – 10.24.171.254	10.24.171.255
173	10.24.172.0/24	10.24.172.1 – 10.24.172.254	10.24.172.255
174	10.24.173.0/24	10.24.173.1 – 10.24.173.254	10.24.173.255
175	10.24.174.0/24	10.24.174.1 – 10.24.174.254	10.24.174.255
176	10.24.175.0/24	10.24.175.1 – 10.24.175.254	10.24.175.255
177	10.24.176.0/24	10.24.176.1 – 10.24.176.254	10.24.176.255
178	10.24.177.0/24	10.24.177.1 – 10.24.177.254	10.24.177.255
179	10.24.178.0/24	10.24.178.1 – 10.24.178.254	10.24.178.255
180	10.24.179.0/24	10.24.179.1 – 10.24.179.254	10.24.179.255
181	10.24.180.0/24	10.24.180.1 – 10.24.180.254	10.24.180.255
182	10.24.181.0/24	10.24.181.1 – 10.24.181.254	10.24.181.255
183	10.24.182.0/24	10.24.182.1 – 10.24.182.254	10.24.182.255
184	10.24.183.0/24	10.24.183.1 – 10.24.183.254	10.24.183.255
185	10.24.184.0/24	10.24.184.1 – 10.24.184.254	10.24.184.255
186	10.24.185.0/24	10.24.185.1 – 10.24.185.254	10.24.185.255
187	10.24.186.0/24	10.24.186.1 – 10.24.186.254	10.24.186.255
188	10.24.187.0/24	10.24.187.1 – 10.24.187.254	10.24.187.255
189	10.24.188.0/24	10.24.188.1 – 10.24.188.254	10.24.188.255
190	10.24.189.0/24	10.24.189.1 – 10.24.189.254	10.24.189.255
191	10.24.190.0/24	10.24.190.1 – 10.24.190.254	10.24.190.255
192	10.24.191.0/24	10.24.191.1 – 10.24.191.254	10.24.191.255
193	10.24.192.0/24	10.24.192.1 – 10.24.192.254	10.24.192.255
194	10.24.193.0/24	10.24.193.1 – 10.24.193.254	10.24.193.255
195	10.24.194.0/24	10.24.194.1 – 10.24.194.254	10.24.194.255
196	10.24.195.0/24	10.24.195.1 – 10.24.195.254	10.24.195.255
197	10.24.196.0/24	10.24.196.1 – 10.24.196.254	10.24.196.255
198	10.24.197.0/24	10.24.197.1 – 10.24.197.254	10.24.197.255
199	10.24.198.0/24	10.24.198.1 – 10.24.198.254	10.24.198.255
200	10.24.199.0/24	10.24.199.1 – 10.24.199.254	10.24.199.255
201	10.24.200.0/24	10.24.200.1 – 10.24.200.254	10.24.200.255
202	10.24.201.0/24	10.24.201.1 – 10.24.201.254	10.24.201.255
203	10.24.202.0/24	10.24.202.1 – 10.24.202.254	10.24.202.255
204	10.24.203.0/24	10.24.203.1 – 10.24.203.254	10.24.203.255
205	10.24.204.0/24	10.24.204.1 – 10.24.204.254	10.24.204.255
206	10.24.205.0/24	10.24.205.1 – 10.24.205.254	10.24.205.255
207	10.24.206.0/24	10.24.206.1 – 10.24.206.254	10.24.206.255
208	10.24.207.0/24	10.24.207.1 – 10.24.207.254	10.24.207.255
209	10.24.208.0/24	10.24.208.1 – 10.24.208.254	10.24.208.255
210	10.24.209.0/24	10.24.209.1 – 10.24.209.254	10.24.209.255
211	10.24.210.0/24	10.24.210.1 – 10.24.210.254	10.24.210.255
212	10.24.211.0/24	10.24.211.1 – 10.24.211.254	10.24.211.255
213	10.24.212.0/24	10.24.212.1 – 10.24.212.254	10.24.212.255
214	10.24.213.0/24	10.24.213.1 – 10.24.213.254	10.24.213.255
215	10.24.214.0/24	10.24.214.1 – 10.24.214.254	10.24.214.255
216	10.24.215.0/24	10.24.215.1 – 10.24.215.254	10.24.215.255
217	10.24.216.0/24	10.24.216.1 – 10.24.216.254	10.24.216.255
218	10.24.217.0/24	10.24.217.1 – 10.24.217.254	10.24.217.255
219	10.24.218.0/24	10.24.218.1 – 10.24.218.254	10.24.218.255
220	10.24.219.0/24	10.24.219.1 – 10.24.219.254	10.24.219.255
221	10.24.220.0/24	10.24.220.1 – 10.24.220.254	10.24.220.255
222	10.24.221.0/24	10.24.221.1 – 10.24.221.254	10.24.221.255
223	10.24.222.0/24	10.24.222.1 – 10.24.222.254	10.24.222.255
224	10.24.223.0/24	10.24.223.1 – 10.24.223.254	10.24.223.255
225	10.24.224.0/24	10.24.224.1 – 10.24.224.254	10.24.224.255
226	10.24.225.0/24	10.24.225.1 – 10.24.225.254	10.24.225.255
227	10.24.226.0/24	10.24.226.1 – 10.24.226.254	10.24.226.255
228	10.24.227.0/24	10.24.227.1 – 10.24.227.254	10.24.227.255
229	10.24.228.0/24	10.24.228.1 – 10.24.228.254	10.24.228.255
230	10.24.229.0/24	10.24.229.1 – 10.24.229.254	10.24.229.255
231	10.24.230.0/24	10.24.230.1 – 10.24.230.254	10.24.230.255
232	10.24.231.0/24	10.24.231.1 – 10.24.231.254	10.24.231.255
233	10.24.232.0/24	10.24.232.1 – 10.24.232.254	10.24.232.255
234	10.24.233.0/24	10.24.233.1 – 10.24.233.254	10.24.233.255
235	10.24.234.0/24	10.24.234.1 – 10.24.234.254	10.24.234.255
236	10.24.235.0/24	10.24.235.1 – 10.24.235.254	10.24.235.255
237	10.24.236.0/24	10.24.236.1 – 10.24.236.254	10.24.236.255
238	10.24.237.0/24	10.24.237.1 – 10.24.237.254	10.24.237.255
239	10.24.238.0/24	10.24.238.1 – 10.24.238.254	10.24.238.255
240	10.24.239.0/24	10.24.239.1 – 10.24.239.254	10.24.239.255
241	10.24.240.0/24	10.24.240.1 – 10.24.240.254	10.24.240.255
242	10.24.241.0/24	10.24.241.1 – 10.24.241.254	10.24.241.255
243	10.24.242.0/24	10.24.242.1 – 10.24.242.254	10.24.242.255
244	10.24.243.0/24	10.24.243.1 – 10.24.243.254	10.24.243.255
245	10.24.244.0/24	10.24.244.1 – 10.24.244.254	10.24.244.255
246	10.24.245.0/24	10.24.245.1 – 10.24.245.254	10.24.245.255
247	10.24.246.0/24	10.24.246.1 – 10.24.246.254	10.24.246.255
248	10.24.247.0/24	10.24.247.1 – 10.24.247.254	10.24.247.255
249	10.24.248.0/24	10.24.248.1 – 10.24.248.254	10.24.248.255
250	10.24.249.0/24	10.24.249.1 – 10.24.249.254	10.24.249.255
251	10.24.250.0/24	10.24.250.1 – 10.24.250.254	10.24.250.255
252	10.24.251.0/24	10.24.251.1 – 10.24.251.254	10.24.251.255
253	10.24.252.0/24	10.24.252.1 – 10.24.252.254	10.24.252.255
254	10.24.253.0/24	10.24.253.1 – 10.24.253.254	10.24.253.255
255	10.24.254.0/24	10.24.254.1 – 10.24.254.254	10.24.254.255
256	10.24.255.0/24	10.24.255.1 – 10.24.255.254	10.24.255.255

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 /16
/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	1
/17	255.255.128.0	32,768	32,766	2 split →
/18	255.255.192.0	16,384	16,382	4 split →
/19	255.255.224.0	8,192	8,190	8 split →
/20	255.255.240.0	4,096	4,094	16 split →
/21	255.255.248.0	2,048	2,046	32 split →
/22	255.255.252.0	1,024	1,022	64 split →
/23	255.255.254.0	512	510	128 split →
/24	255.255.255.0	256	254	256 split →
/25	255.255.255.128	128	126	512 split →
/26	255.255.255.192	64	62	1,024 split →
/27	255.255.255.224	32	30	2,048 split →
/28	255.255.255.240	16	14	4,096 split →
/29	255.255.255.248	8	6	8,192 split →
/30	255.255.255.252	4	2	16,384 split →
/31	255.255.255.254	2	2	32,768 split →
/32	255.255.255.255	1	1	65,536 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 →