Is there a program on the web where you can put in an address and it gives you the name?

[mdennison]

???

 

[GigaCluster]

Not a retail software program, because these things (name <-> address mappings) change every hour.
Unless the program contacts a special database (which is most likely not available to "common people") on-the-fly, there's no way to keep up with the changes.

 

[worth]

Umm ... A nameserver client?

GigaCluster, for your information name servers are available to everyone, since otherwise you wouldn't really be able to browse the Internet.

 

[bigrash]

try anywho.com