Demkowicz has listed (973) 839-2666 as this person's phone number. James B Giordano, Lucy J Giordano, Joann Giordano and 6 other people are people possibly related to Demkowicz. 1970 is the birth year of Demkowicz. Demkowicz has reached the age of 55 years. Demkowiczâs residency is at 42 Cannonball Rd, Wanaque, Nj 07465. Public records show Hewitt, Haskell, Pompton Lakes and one other city as cities Demkowicz also stayed in.