TL;DR
Phone number enrichment uses whatever identifying data you already have on a lead — Business Email, LinkedIn URL, name, or company domain.
Select "Mobile Phone Number" in the Field Selection step to include it in your enrichment.
Phone numbers are currently available for US contacts only.
Mobile Phone Number costs 3 credits per number found. You're not charged when no number is found.
Not every lead will return a phone number — it depends on what's available and how much identifying data you started with.
When you'd use this / Why it matters
Phone numbers are one of the harder data points to enrich, since not every lead has a publicly discoverable number. Understanding what ListKit needs to find one — and how to select it correctly — helps you get the best match rate possible.
What ListKit uses to find a phone number
You don't need a specific starting field to enrich phone numbers. ListKit can attempt to find a number using any identifying data already on the lead, including:
Business Email
LinkedIn URL
Name
Company domain
The more of these you have on a given lead, the better the chances of a successful match.
Step-by-step: Enrich leads with phone numbers
Go to Enrichment (fourth icon in the left sidebar) and upload your CSV or import from HubSpot, as with any enrichment job
Complete column mapping
On the Field Selection screen, go to the Leads tab
Check the box next to Mobile Phone Number
Select any other fields you want enriched alongside it
Review your estimated credit cost
Click Continue, then Start Enrichment
Monitoring results
Leads marked "Not Found" for phone number specifically usually didn't have enough identifying data tied to a discoverable number — this is normal and expected on a portion of any list. You're not charged for them.
Troubleshooting / FAQs
Do I need a LinkedIn URL to enrich a phone number?
No. LinkedIn URL helps, but Business Email, name, or domain can also be used.
Why did some leads come back without a phone number?
Not every lead has a publicly discoverable number. This is expected and not every record will return one.
Does phone number enrichment cost more than other fields?
Yes. Mobile Phone Number costs 3 credits per number found. Business Email is free and Business Email + Verification is 1 credit. See How many credits does enrichment use?