Just got a call from this number.  Since this is my work number, I answered with my regular greeting but got no response from the caller, who hung up on me.

Just received a call asking for the "fleet manager." He hung up after about a minute and eight seconds.

Called again. Hung up immediately after I put him on hold.

Asked for fleet manager. Put him straight to voicemail.

Said they were with Shell oil and wanted to talk to whoever made decisions on fuel cards. Phone rang once two separate calls and the last one stuck so I answered, but they hung up after about a minute on hold.