Short answer: To enrich HubSpot contacts with missing phone numbers, first build a filtered view or list of contacts where the phone fields are empty, then export that segment with its Record ID and email. Run it through a contact data tool (or look up priority contacts one by one with a Chrome extension), check the results, and re-import the file into HubSpot so it updates existing records instead of creating duplicates. Finish by standardising number formats and setting up a simple routine so new contacts don't arrive without numbers.
Why phone numbers go missing in HubSpot
Gaps in phone data are normal. They usually come from a few places:
- Form fills where the phone field was optional or left out to keep the form short.
- Email-only sources such as newsletter sign-ups, event lists or email finders.
- Old imports from spreadsheets that only had names and emails.
- Job changes, where the number you had now belongs to someone else or no longer works.
- Company numbers only, where you have a reception line but no direct dial or mobile.
For teams selling in India, the gap matters more than it might elsewhere. Many Indian decision-makers are easiest to reach on their mobile, and a quick call or WhatsApp follow-up often moves a deal faster than another email.
Step 1: Decide which contacts are worth enriching
Don't enrich your whole database at once. Data tools usually charge per contact, and not every record deserves a phone number. Prioritise:
- Contacts at target accounts or companies that match your ICP
- Contacts in active deals or open opportunities
- Decision-makers and key influencers by job title
- Recent, engaged leads (opened emails, visited pricing pages, booked demos)
Skip contacts who have unsubscribed or asked not to be contacted, and anyone outside your target market.
Step 2: Find the contacts with missing numbers
In HubSpot, go to your contacts and add filters so you only see records where the phone fields are empty. HubSpot has default properties such as Phone number and Mobile phone number, and filters let you show records where a property "is unknown".
A useful filter combination:
- Phone number is unknown
- Mobile phone number is unknown
- Plus your priority filters, such as lifecycle stage, country, job title or associated company
Save this as a view or a list so you can come back to it. The exact menu names can change as HubSpot updates its interface, so check HubSpot's own help pages if something looks different.
Step 3: Export the segment
Export the filtered contacts to a CSV or Excel file. Include at least:
- Record ID (the most reliable way to match records on re-import)
- First name and last name
- Company name and company domain
- Job title
- LinkedIn profile URL, if you store it
The more identifying details you include, the better any enrichment tool can match the right person.
Step 4: Enrich the file
You have a few options, depending on volume and budget.
Option A: Bulk enrichment with a contact data tool
Many contact data providers let you upload a file and return matched emails and phone numbers. Upload your export, map the columns, and download the enriched file. Check how the tool charges: some use a credit even when nothing is found, and phone reveals may cost more than emails.
Option B: Manual lookup for priority contacts
For your highest-value contacts, a Chrome extension that reveals contact details on LinkedIn profiles is often the most reliable way to be sure you have the right person. Open each person's profile, reveal their number, and add it to your file or directly to the HubSpot record. It's slower, but you see exactly who you're getting a number for.
Option C: A HubSpot-connected integration
Some enrichment tools connect directly to HubSpot through the HubSpot App Marketplace or their own integration, and can update records automatically. HubSpot itself also offers some data enrichment features on certain plans. Check what your plan includes and test any integration on a small segment first, because automatic updates can overwrite good data if they're set up loosely.
Step 5: Check the results before re-importing
Don't push enriched data straight back. Spend a few minutes on quality:
- Spot-check names and companies. Make sure the returned number belongs to the person in the row, not someone with a similar name.
- Separate mobile from office numbers. Put mobiles in the mobile phone property and office or board lines in the phone property.
- Standardise the format. Use a consistent international format, such as +91 followed by the number for Indian mobiles, so click-to-call and dialler tools work reliably.
- Remove blanks. Leave a cell empty rather than filling it with "N/A" or similar, which can overwrite good data later.
- Call a small sample. Ring a handful of numbers to confirm they reach the right person before you trust the whole file.
Step 6: Re-import into HubSpot without duplicates
Use HubSpot's import tool to update existing contacts. Match on Record ID where possible, or on email if Record ID isn't available. Map your enriched columns to the right properties, and only include the columns you want to change, so you don't accidentally overwrite other fields.
Before importing the full file, test with a small batch and check a few records to confirm the numbers landed in the right place.
Step 7: Stop the gap from coming back
Enrichment is a recurring job, not a one-off. A few habits help:
- Add an optional phone field to high-intent forms such as demo requests.
- Ask reps to add numbers they collect during calls and meetings.
- Enrich at the point of prospecting by capturing numbers when you first add a contact from LinkedIn.
- Review your "phone is unknown" view regularly and enrich new priority contacts in small batches.
- Use workflows or tasks (depending on your HubSpot plan) to flag new high-value contacts without a number.
Enrichment checklist
- Filtered view of priority contacts with missing phone numbers
- Export includes Record ID, email, name, company and job title
- Enrichment method chosen: bulk, manual or integration
- Results spot-checked and formats standardised
- Mobiles and office lines mapped to the right properties
- Test import done before the full import
- Opted-out contacts excluded
Where PeakAI fits
If many of your HubSpot contacts are at Indian companies, PeakAI can help fill the gaps. It's a B2B contact data tool focused on India that finds verified emails and mobile numbers for decision-makers, including from LinkedIn profiles through its Chrome extension. You can use it to look up priority contacts and add the numbers to HubSpot as part of the steps above. Check thepeakai.com for current features, including how exports work, and test it on a small segment first.
FAQ
Can HubSpot find phone numbers on its own?
HubSpot offers some enrichment features on certain plans, and its marketplace includes third-party enrichment apps. What you get depends on your plan and the tool. Check HubSpot's current plan details and test coverage on your own contacts.
How do I avoid creating duplicate contacts when re-importing?
Include the Record ID in your export and match on it during import. If you can't, match on email. Test with a small batch first.
Should I store mobile and office numbers separately?
Yes. Keeping mobiles in the mobile phone property and board lines in the phone property makes it clear which number reaches the person directly.
Is it okay to call contacts after enriching their numbers?
Follow applicable laws and regulations for calling and messaging in each market you sell to, respect do-not-call and opt-out requests, and only contact people with a genuine, relevant business reason.