I cant give you an exact answer but I use Neotrace, you just put in the web address or the digits and it traces it for you.
From the trace the following was obtained:
RealNetworks, Inc. (NETBLK-PROGNET-REAL)
2601 Elliott Ave
Seattle, WA 98121
US
Netname: PROGNET-REAL
Netblock: 207.188.0.0 - 207.188.31.255
Maintainer: REAL
Coordinator:
RealNetworks, Inc. (IR57-ARIN)
[email protected]
(206) 892-6737
Domain System inverse mapping provided by:
BENNY.PROGNET.COM 204.71.154.5
RUGBUG.PROGNET.COM 205.219.198.34
ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE
Record last updated on 20-Jun-2001.
Database last updated on 11-Feb-2002 19:56:34 EDT.
The ARIN Registration Services Host contains ONLY Internet
Network Information: Networks, ASN's, and related POC's.
Please use the whois server at rs.internic.net for DOMAIN related
Information and whois.nic.mil for NIPRNET Information.
and that the server is in Seattle USA.
If you want Neotrace its freeware and can be downloaded from www.neoworx.com