IP addresses are not for sale, instead, they are public resources administered by the Internet Numbers Registry System for the entire Internet community.
IP addresses delegated by the Regional registries, such as APNIC are not "owned" by the Members.
IP addresses will be reclaimed by APNIC when the Membership is terminated.
In a block addresses ranges are referred to by their prefix length like /24 ("slash 24"), refers to 256 addresses.
There are total five Regional Internet Registries (RIR's).
To improve allocation and registration services for the Asia Pacific Internet community, APNIC provides for the establishment of National Internet Registries (NIRs).
A Local Internet Registry (LIR) is generally an Internet Service Provider (ISP), and may assign address space to its own network infrastructure and to users of its network services.
LIR customers may be other "downstream" ISPs, which further assign address space to their own customers.
How to purchase ip block ?
Go to the official website of apnic and click on get ip addresses.
Click on apply now and fill the details.
We can also search the ip address data in apnic whois.