No voice mail.  No caller id - just 'Los Angeles'

This # just called my work place landline phone. Anyone know who they are?

This is a wireless call robo-caller, also check out 213-504-5309, and points back to 866-982-8873, pushing calendars, and other mindless junk.

answered from this number, pressed 1 and got representative, I said I want to be taken off the calling list and they were interrupting my dinner.  the young guy was so unprofessional, that I couldn't believe it.  "Oh no, I'm interrupting your dinner, oh no!"  I wish this country would not let telemarketers call people randomly.  It is so inappropriate!

Getting this A holes calling me everyday at same time, is there any app that block phone numbers?