For long time was wondering whether I can shift to 100% IPv6 stack. Finally decided to give it a try. List of site which were evaluated.

CategoryNameIPv6 Ready
AntiVirusMacafeeNo
AntiVirusNortonNo
AntiVirusQuickHealNo
AstronomyIUCAANo
BankingAxis Bank (Akamai)Yes
BankingAxis Bank NetbankingNo
BankingHDFC BankYes
BankingHDFC Bank NetbankingNo
BankingIDBI BankYes
BankingIDBI Bank NetbankingNo*
BankingSBIYes
BankingSBI NetbankingYes
BlogMedium (CloudFlare)Yes
BlogWordpressNo
CDNCloudFlareYes
Cloud HostingAmazon AWSNo
Cloud HostingDigitalOceanYes
Cloud HostingHerokuNo
Cloud HostingLinodeYes
Cloud HostingOracle CloudYes
Cloud InfraOpen Stack (CloudFlare)Yes
DatabaseDuckDB (CloudFlare)Yes
DatabaseMariaDBYes
DatabaseMongoDB (CloudFront)Yes
DatabasePostgreSQLYes
DatabaseSqliteYes
DevelopmentBitBucketYes
DevelopmentGitHubNo
DevelopmentGitLabYes
DevelopmentMDN a.k.a. Mozilla Development Network (CloudFront)Yes
DevelopmentMSDN MicroSoftNo
DevelopmentPython Package IndexYes
DevelopmentSourceForgeNo
DevelopmentSourceHuntNo
EditorsVimNo
EducationIISERNo
EducationIITBNo
EmailGMailYes
EmailIDNMail.netYes
EmailOutlookNo
EmailProton MailNo
EmailYahoo MailNo
EmailZoho MailNo
Email ClientThunderBirdYes*
EncyclopediaWikipediaYes
EntertainmentAmazon PrimeVideoNo
EntertainmentHotStarNo
EntertainmentNetFlixYes
EntertainmentSonyLiv (Akamai)Yes
EntertainmentZee5No
FOSSGNU - gnu.orgYes
GovernmentIndia (india.gov.in)No
MessagingLibera ChatYes
MessagingMatrix - matrix.org (CloudFlare)Yes
MessagingTelegramYes
MessagingWhatsAppYes
NewsAlJazeera (Akamai)Yes
NewsBBCNo
NewsCNN (Fastly)Yes
NewsKesariNo
NewsLoksatta (Akamai)No
NewsMaharashtra Times (Akamai)Yes
NewsPrahaarNo
NewsPrasar BharatiNo
NewsRussian Times - rt.comNo
NewsTimes Of India (Akamai)Yes
NewseSakal (CloudFlare)Yes
OSAlpine LinuxYes
OSApple (Akamai)Yes
OSArchLinuxYes
OSCentOSYes
OSFreeBSDYes
OSIndLinuxNo
OSMicrosoftYes
OSMintNo
OSNetBSDYes
OSOpenBSDNo
OSRedHatYes
OSUbuntuYes
Online StorageBoxNo
Online StorageDropboxYes
Online StorageMegaYes
Online StorageOneDriveNo
ProgrammingGo LangYes
ProgrammingJavaYes
ProgrammingJavaScriptYes
ProgrammingLuaYes
ProgrammingPHPYes
ProgrammingPerl (Fastly)Yes
ProgrammingPython (Fastly)Yes
ProgrammingRuby (Fastly)Yes
Q&AQuora (Fastly)No
Q&AStackOverflowNo
SSL CertsLet’s EncryptNo
SSL CertsZeroSSLNo
SearchBingYes
SearchBraveYes
SearchDuckDuckGoNo
SearchGoogleYes
SearchStart PageNo
Shared HostingDreamHostYes
ShoppingAmazonIN (Cloudflare)Yes
ShoppingFlipkartNo
Social NetworkFaceBookYes
Social NetworkInstagramYes
Social NetworkTwitterNo
VCS/DVCSFossilYes
VCS/DVCSGitYes
VCS/DVCSMercurial (Hg)Yes
VCS/DVCSSubversionYes
VPNNord VPNNo
VPNProton VPNNo
VPNWireGuardYes
VideoVimeoNo
VideoYouTubeYes
Web ServerApacheYes
Web ServerHAProxyYes
Web ServerNginxYes
WebBrowserBraveYes
WebBrowserDilloNo
WebBrowserFireFoxNo
WebBrowserOperaNo
-NIXI - nixi.inYes*
-Registry.inNo
-Tor - www.torproject.comYes

No* -> Has DNS entry, site not accessible Yes* -> Website available, Download not available