text/vcard

The contact card format, standardized as vCard 4.0 in RFC 6350 after a messy adolescence as text/x-vcard and text/directory. vCard 4 is UTF-8 only, which retired the per-property charset hacks of vCard 2.1. The trap is versioning, not labeling: most files in the wild are still 2.1 or 3.0 exports from phones and address books, and a parser expecting 4.0 semantics will trip on them whatever the media type says.

.vcf is what everyone actually names the files, inherited from the pre-standard vCard types.

Defined by RFC 6350 · IANA registration. Registry facts from the IANA media-types registry via mime-db.