However, since the pet food scare of 2007 when unknown numbers of pets became seriously ill from contaminated food, pet owners have become more aware of what they feed their furry friends. (dogcare.dailypuppy.com)
Even if you've stopped answering calls from unknown numbers, the ringing can take you out of your flow. (entrepreneur.com)
Every day, many marketing agencies shoot or blast SMS and emails on unknown numbers to promote products & services. (indabaa.com)