Some domains have hard-coded favicon. See them here.

Domain	Source	Inferred Type	Inferred Size(s)
10fastfingers.com	well-known:/favicon.ico	ico	16x16
3dwarehouse.sketchup.com	html:/favicon.ico	ico	48x48
9animetv.to	html:/images/favicon.png	png	512x512
access.paylocity.com	html:https://cdn.paylocity.com/cdn/branding/favicon.ico	png	32x32
account.squarespace.com	well-known:/favicon.ico	png	32x32
accounts.google.com	well-known:/favicon.ico	ico	16x16, 32x32
acorn.utoronto.ca	well-known:/favicon.ico	ico
acrobat.adobe.com	html:/favicon.ico	ico	32x31
aeon.co	html:/favicon.ico?favicon.fbde314a.ico	ico	48x48
airtable.com	html:/favicon.ico	png	48x48
alison.com	html:https://cdn01.alison-static.net/public/html/vendor/img/favicon/favicon-32x32.png	webp	32x32
animixplay.to	well-known:/favicon.ico	ico	32x32
aniwatch.to	well-known:/favicon.ico	ico	16x16, 24x24, 32x32, 48x48, 64x64
aniwatchtv.to	html:/favicon-32x32.png	png	32x32
aniwave.to	well-known:/favicon.ico	ico
ankiweb.net	html:/logo.png	png	64x64
answerthepublic.com	html:/assets/favicon-3bb5af95113cb2624ab3955ba255a769f6e7b020d3dd0e66352c09c354943ef0.ico	png	48x48
apnews.com	html:/favicon-32x32.png	png	32x32
app.any.do	html:/favicon.ico	ico	16x16, 32x32, 48x48
app.asana.com	html:https://d3ki9tyy5l5ruj.cloudfront.net/obj/df5bcec7e9873dddebdd1328901c287f0f069750/asana-logo-favicon@3x.png	png	48x48