Got a call from this number and no voicemail

Received a phone call from this number. The caller left no message.

got a call from the same number...i didnt pick up cause i dont know the number/.

Got call too. My caller ID showed the number was from CA, US only. Usually it specifies a city, therefore I didn't pick up. If it was important than they should of left me a voice message but none left. My guess is telemarketers.