Darkkrys says:

They get their domain name from Markmonitor.com.
MarkMonitor.com – The Leader in Corporate Domain Management
————————————–…
For Global Domain Consolidation, Research & Intelligence,
and Enterprise DNS, go to: http://www.markmonitor.com
————————————–…
The Data in MarkMonitor.com’s WHOIS database is provided by MarkMonitor.com
for information purposes, and to assist persons in obtaining information
about or related to a domain name registration record. MarkMonitor.com
does not guarantee its accuracy. By submitting a WHOIS query, you agree
that you will use this Data only for lawful purposes and that, under no
circumstances will you use this Data to: (1) allow, enable, or otherwise
support the transmission of mass unsolicited, commercial advertising or
solicitations via e-mail (spam); or (2) enable high volume, automated,
electronic processes that apply to MarkMonitor.com (or its systems).
MarkMonitor.com reserves the right to modify these terms at any time.
By submitting this query, you agree to abide by this policy.
Registrant:
Yahoo! Inc. (DOM-272993)
701 First Avenue
Sunnyvale CA 94089
US
Domain Name: yahoo.com
Registrar Name: Markmonitor.com
Registrar Whois: whois.markmonitor.com
Registrar Homepage: http://www.markmonitor.com
Administrative Contact:
Domain Administrator (NIC-1382062) Yahoo! Inc.
701 First Avenue
Sunnyvale CA 94089
US
domainadmin@yahoo-inc.com
+1.4083493300
Fax- +1.4083493301
Technical Contact, Zone Contact:
Domain Administrator (NIC-1372925) Yahoo! Inc.
701 First Avenue
Sunnyvale CA 94089
US
domainadmin@yahoo-inc.com
+1.4083493300
Fax- +1.4083493301
Created on…………..: 1995-Jan-18.
Expires on…………..: 2012-Jan-19.
Record last updated on..: 2006-Dec-29 14:54:25.
Domain servers in listed order:
NS4.YAHOO.COM
NS5.YAHOO.COM
NS1.YAHOO.COM
NS2.YAHOO.COM
NS3.YAHOO.COM
MarkMonitor.com – The Leader in Corporate Domain Management
————————————–…
For Global Domain Consolidation, Research & Intelligence,
and Enterprise DNS, go to: http://www.markmonitor.com
————————————–…
The previous information has been obtained either directly from the registrant or a registrar of the domain name other than Network Solutions. Network Solutions, therefore, does not guarantee its accuracy or completeness.
Show underlying registry data for this record
Current Registrar: MARKMONITOR INC.
IP Address: 209.73.186.238 (ARIN & RIPE IP search)
IP Location: US(UNITED STATES)-CALIFORNIA-SUNNYVALE
Record Type: Domain Name
Server Type: Other
Lock Status: clientDeleteProhibited
Web Site Status: Active
DMOZ 4 listings
Y! Directory: see listings
Web Site Title: Yahoo!
Secure: Yes
E-commerce: No
Traffic Ranking: 4
Data as of: 19-Nov-2006