This might be the result of DNS caching. You can use DNS flush to remove the eBay API DNS information that stored in cache to get a new name resolution:
Windows
Display the entries in the DNS cache and send result to a file
> ipconfig/displaydns > oldDns.txt
Clear or Flush the DNS Cache
> ipconfig /flushdns
Linux
To restart the nscd daemon
% /etc/rc.d/init.d/nscd restart
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