Reverse lookup not working

[onequestion]

Hi friends..
Reverse lookup is not working for some ip.

nslookup www.aircell.com gives 74.50.0.200 but
nslookup 74.50.0.200 gives sirona.lunarser vers.com

To perform DNS i'm using this code

String tmp = InetAddress.get ByName(temp1.ge tAuthority()).g etCanonicalHost Name();

where temp1 gets ip address at run time. How to solve this problem?

Thanks..

[Plater]

There is nothing wrong with that reverse lookup.
More then one name can map to an ip address, and is rather common.
Example:

> google.com
Non-authoritative answer:
Name: google.com
Addresses: 72.14.207.99, 64.233.187.99, 64.233.167.99

> 72.14.207.99
Name: eh-in-f99.google.com
Address: 72.14.207.99