Before you start collecting anything, decide:
What industries are you fax lists targeting? (e.g., real estate offices, law firms, medical offices, auto shops)
What geographic range? (Zip code, city, county?)
Example: "Real estate offices and property managers in Tampa, FL."
2. Use Online Business Directories
Look for publicly listed fax numbers from reliable sources like:
YellowPages.com
Yelp.com (sometimes includes fax in business details)
Google Business Profiles (check "Contact info" on GMB pages)
Local Chamber of Commerce or business association directories
State or city licensing websites
Tip: Use a spreadsheet to log:Business name
Fax number
Contact person (if available)
Website
Industry
Consent status (see below)
3. Call to Confirm & Request Permission
Unsolicited faxes are restricted by law — always get prior express permission.
Sample call script:
"Hi, I’m [Your Name] with [Your Company]. We occasionally send local businesses helpful updates, promotions, or alerts by fax. Do you accept faxes, and would you like to be on our fax list?"
Track whether they opt-in and when.
Store signed or recorded consent if possible.
4. Use Online Forms to Collect Opt-InsIf you already have a customer list or local website:
Create a simple sign-up form:
"Want to receive special offers or notices by fax? Share your fax number here."
Promote it via email, social, or even in print.
5. In-Person CollectionWhen networking locally (e.g., chamber mixers, business fairs):
Ask if businesses still use fax and offer something of value (coupon, market report) to join your list.
Bring a sign-up sheet or tablet to gather fax numbers with consent.
6. Consider Buying a Starter List (Cautiously)
If you must:
Only buy from reputable sources that guarantee opt-in data.
Still verify and get additional consent yourself before using the list.
Legal & Ethical Considerations
Never send unsolicited faxes — it’s illegal under the Junk Fax Prevention Act.
Include an opt-out notice on every fax.
Keep records of consent (date, source, name).
Pro Tips
Use software or CRM to tag and track consent status.
Send value-driven content, not just sales pitches — make businesses want to stay subscribed.
Refresh the list every 3–6 months to remove defunct numbers or non-responders.
Final Thought:Building a fax list legally and ethically takes effort, but in specific local markets (especially with B2B or regulated industries), it can still generate leads if used wisely. Just make sure compliance and value are your top priorities.
Want help writing an opt-in form or first fax campaign?