no, it's not. That's a digest response. You need to redo the lookup as =yahoo.com to get their record:

#whois =yahoo.com

(scroll to bottom for yahoo.com listing)

Whois Server Version 2.0

Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.

Server Name: YAHOO.COM.ZZZZZZZ.GET.ONE.MILLION.DOLLARS.AT.WWW.UNIMUNDI.COM
IP Address: 209.126.190.70
Registrar: DIRECTI INTERNET SOLUTIONS PVT. LTD. D/B/A PUBLICDOMAINREGISTRY.COM
Whois Server: whois.PublicDomainRegistry.com
Referral URL: http://www.PublicDomainRegistry.com

Server Name: YAHOO.COM.ZZZZZZ.MORE.INFO.AT.WWW.BEYONDWHOIS.COM
IP Address: 203.36.226.2
Registrar: TUCOWS.COM CO.
Whois Server: whois.tucows.com
Referral URL: http://domainhelp.opensrs.net

Server Name: YAHOO.COM.ZZZZZ.GET.LAID.AT.WWW.SWINGINGCOMMUNITY.COM
IP Address: 69.41.185.196
Registrar: TUCOWS.COM CO.
Whois Server: whois.tucows.com
Referral URL: http://domainhelp.opensrs.net

Server Name: YAHOO.COM.ZOMBIED.AND.HACKED.BY.WWW.WEB-HACK.COM
IP Address: 217.107.217.167
Registrar: DOMAINCONTEXT, INC.
Whois Server: whois.domaincontext.com
Referral URL: http://www.domaincontext.com

Server Name: YAHOO.COM.VN
Registrar: MELBOURNE IT, LTD. D/B/A INTERNET NAMES WORLDWIDE
Whois Server: whois.melbourneit.com
Referral URL: http://www.melbourneit.com

Server Name: YAHOO.COM.VIRGINCHASSIS.COM
IP Address: 66.218.71.205
Registrar: DOTSTER, INC.
Whois Server: whois.dotster.com
Referral URL: http://www.dotster.com

Server Name: YAHOO.COM.TWIXTEARS.COM
IP Address: 66.218.71.205
Registrar: DOTSTER, INC.
Whois Server: whois.dotster.com
Referral URL: http://www.dotster.com

Server Name: YAHOO.COM.TW
Registrar: GODADDY.COM, INC.
Whois Server: whois.godaddy.com
Referral URL: http://registrar.godaddy.com

Server Name: YAHOO.COM.SINGERPAT.COM
IP Address: 98.136.43.32
IP Address: 66.196.84.168
Registrar: GODADDY.COM, INC.
Whois Server: whois.godaddy.com
Referral URL: http://registrar.godaddy.com

Server Name: YAHOO.COM.SG
Registrar: DOTSTER, INC.
Whois Server: whois.dotster.com
Referral URL: http://www.dotster.com

Server Name: YAHOO.COM.MX
Registrar: DIRECTI INTERNET SOLUTIONS PVT. LTD. D/B/A PUBLICDOMAINREGISTRY.COM
Whois Server: whois.PublicDomainRegistry.com
Referral URL: http://www.PublicDomainRegistry.com

Server Name: YAHOO.COM.MORE.INFO.AT.WWW.BEYONDWHOIS.COM
IP Address: 203.36.226.2
Registrar: TUCOWS.COM CO.
Whois Server: whois.tucows.com
Referral URL: http://domainhelp.opensrs.net

Server Name: YAHOO.COM.JTNELECTRIC.COM
IP Address: 66.218.71.205
IP Address: 216.109.116.20
Registrar: GODADDY.COM, INC.
Whois Server: whois.godaddy.com
Referral URL: http://registrar.godaddy.com

Server Name: YAHOO.COM.IS.N0T.AS.1337.AS.SEARCH.GULLI.COM
IP Address: 80.190.192.24
Registrar: EPAG DOMAINSERVICES GMBH
Whois Server: whois.enterprice.net
Referral URL: http://www.enterprice.net

Server Name: YAHOO.COM.HK
Registrar: ENOM, INC.
Whois Server: whois.enom.com
Referral URL: http://www.enom.com

Server Name: YAHOO.COM.ELPOV.COM
IP Address: 66.21.71.205
Registrar: FASTDOMAIN, INC.
Whois Server: whois.fastdomain.com
Referral URL: http://www.fastdomain.com

Server Name: YAHOO.COM.EATINGFORJOY.NET
IP Address: 66.218.71.205
Registrar: MYDOMAIN, INC.
Whois Server: whois.dotster.com
Referral URL: http://www.dotster.com

Server Name: YAHOO.COM.DUVALMANIA.COM
IP Address: 98.136.43.32
Registrar: GODADDY.COM, INC.
Whois Server: whois.godaddy.com
Referral URL: http://registrar.godaddy.com

Server Name: YAHOO.COM.DALLARIVA.COM
IP Address: 66.218.71.205
Registrar: DOTSTER, INC.
Whois Server: whois.dotster.com
Referral URL: http://www.dotster.com

Server Name: YAHOO.COM.CN
Registrar: BEIJING INNOVATIVE LINKAGE TECHNOLOGY LTD. DBA DNS.COM.CN
Whois Server: whois.dns.com.cn
Referral URL: http://www.dns.com.cn

Server Name: YAHOO.COM.CHRISIMAMURAPHOTOWORKS.COM
IP Address: 66.218.71.205
Registrar: TUCOWS.COM CO.
Whois Server: whois.tucows.com
Referral URL: http://domainhelp.opensrs.net

Server Name: YAHOO.COM.BR
Registrar: ENOM, INC.
Whois Server: whois.enom.com
Referral URL: http://www.enom.com

Server Name: YAHOO.COM.BGPETERSON.COM
IP Address: 66.218.71.205
Registrar: DOTSTER, INC.
Whois Server: whois.dotster.com
Referral URL: http://www.dotster.com

Server Name: YAHOO.COM.AU
Registrar: WILD WEST DOMAINS, INC.
Whois Server: whois.wildwestdomains.com
Referral URL: http://www.wildwestdomains.com

Server Name: YAHOO.COM.ACCUTAXSERVICES.COM
IP Address: 98.136.43.32
IP Address: 66.196.84.168
Registrar: WILD WEST DOMAINS, INC.
Whois Server: whois.wildwestdomains.com
Referral URL: http://www.wildwestdomains.com

Domain Name: YAHOO.COM
Registrar: MARKMONITOR INC.
Whois Server: whois.markmonitor.com
Referral URL: http://www.markmonitor.com
Name Server: NS1.YAHOO.COM
Name Server: NS2.YAHOO.COM
Name Server: NS3.YAHOO.COM
Name Server: NS4.YAHOO.COM
Name Server: NS5.YAHOO.COM
Status: clientDeleteProhibited
Status: clientTransferProhibited
Status: clientUpdateProhibited
Status: serverDeleteProhibited
Status: serverTransferProhibited
Status: serverUpdateProhibited
Updated Date: 30-nov-2011
Creation Date: 18-jan-1995
Expiration Date: 19-jan-2012