Check if a Phone Number Is Mobile or Landline: Free Lookup

What's the difference between mobile, landline, and VOIP?

Every phone number belongs to one of three line types. The type determines what the number can receive, who assigned it, and how reliable it is as a contact signal. Understanding the distinction is the foundation for any outreach strategy or data hygiene project.

Why does line type matter?

Line type is one of the most actionable data points you can attach to a phone number. It directly affects whether you can reach a contact, through which channel, and how much you should invest in the attempt. Here are the four most common reasons teams check it.

• 1
  SMS campaigns. Sending texts to landlines or VOIP numbers that can't receive them wastes money and damages sender reputation with carriers. Only mobile numbers are reliable SMS targets. Filtering your list by line type before a send keeps deliverability high and cost per contact low.
• 2
  Sales outreach. Calling a landline for a contact who only has mobile service (or the reverse) reduces connect rates and wastes dial time. Knowing line type before dialing lets you route to the right channel, set the right cadence, and avoid leaving voicemails on lines nobody checks.
• 3
  Lead quality scoring. A VOIP number on a lead form is a lower-quality signal than a mobile number. It may indicate a disposable contact, a privacy-conscious submitter, or outright fraud. Line type helps you tier leads, set conversion expectations, and prioritize outreach effort appropriately.
• 4
  CRM data hygiene. Enriching contact records with line type lets you segment by contactability, flag numbers that can't receive SMS, and keep your database accurate as contacts change numbers over time. A landline in a mobile-only campaign segment is invisible waste until you label it.

How to check if a number is mobile or landline

There is no visual difference between a mobile, landline, or VOIP number from the digits alone. The only way to reliably determine line type is a carrier database lookup. PhoneCheckr does this in real time, for free.

1. 1
   Enter the number above. Paste or type any 10-digit US or Canadian number. PhoneCheckr accepts all common formats: (555) 123-4567, 5551234567, +1-555-123-4567.
2. 2
   Click "Check number." PhoneCheckr queries a national carrier database to look up the current line type and carrier assignment for that number.
3. 3
   See the result. You get the line type (mobile, landline, or VOIP), the carrier name, and a validity status. No account needed. Results are instant.

Individual lookups are free, up to 10 per hour. Need to check an entire contact list? Upload a CSV file to run line type detection across thousands of numbers in one pass.

How to check line type for a full contact list

For marketing teams, sales ops, and CRM managers working with large contact databases, single lookups don't scale. PhoneCheckr's bulk CSV upload runs line type detection across your entire list in one job and returns a clean report you can drop straight back into your workflow.

To run a bulk check, upload a CSV file with a column of phone numbers. PhoneCheckr processes each row and appends a Type column to every record, returning "mobile", "landline", "voip", or "invalid" for each number, along with the current carrier name. The result file downloads as a CSV you can open directly in Excel or Google Sheets.

Once you have the enriched file, filtering is straightforward. In Excel, use Data → Filter on the Type column and uncheck "landline" and "voip" to isolate your mobile-only segment for SMS sends. In Google Sheets, use Data → Create a filter and apply the same logic. You can also sort by Type to group all landline records together for a voice-only calling list, or flag VOIP records for manual review before high-value outreach.

Bulk lookups are priced at $0.01 per number. A list of 10,000 contacts costs $100 to fully enrich with line type and carrier data. There is no subscription required. You pay only for what you check. Start a bulk check here.

Line type and channel routing

Knowing the line type of every number in your contact list directly changes how you should reach each contact. Different line types require different outreach strategies, and treating all numbers the same means paying for contacts you cannot actually reach.

The practical implication is that a contact list with mixed line types needs to be segmented before any outreach run. Sending a single SMS campaign to a combined list will waste budget on every landline and unresponsive VOIP number in the set. Running a line type check first takes minutes and prevents that waste entirely.

For sales teams, line type also determines voicemail strategy. A landline voicemail goes to an answering machine at a fixed location, often a shared office or household phone. A mobile voicemail goes directly to the individual. Tailoring your voicemail script to the line type improves callback rates and avoids the awkward experience of leaving a personalized pitch on a shared office line.