Numbers with this prefix were first introduced in 1994.While 5106649928 was originally issued with the info above, the owner of the phone number (510) 664-9928 may have transferred it through a process called porting.
Caller name: no name/no message
Caller type: Fax
Recorded message indicated a security system company. They provided a telephone number to call if interest or to "push 9" to be removed from the list.