2vcard(1) on Linux
The text 533794d663a6, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
convert addressbooks to VCARD format
Flags it lists
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-F -
-f -
-h -
-i -
-o -
-v