The same place you would find businesses without a phone number. You walk the street until you stumble upon them.
OR....you can consult with a multi-dimensional professional. The proper solution really depends on your situation. Your request and lack of details suggests there are other issues that must be considered.
Meanwhile. stop in the laundry rooms, and coffee houses and stores that have a community bulletin board and start tearing off those little telephone number tags.
Best of success,
Annette Lawrence, Broker/Associate
Remax Realtec Group
Palm Harbor, FL