Wring phone number

Harold...probably a zillow agent will answer you completely, but I believe those 888 numbers will ring through to your 301 phone.  They assign the 888 numbers to track and then list your calls on your "ad" page. I understand the "phone" number is the zillow number and the "cell" number is the yahoo number.  When these numbers are called your 301 will ring and a recorded voice will say "you have a call from zillow."  Then a short pause and the caller will come on the line.  Try it yourself from another phone.....Paul