How do I check a list of phone numbers in bulk for mobile, landline or VoIP?
Upload a CSV of up to 2 million numbers to 1Lookup and every row comes back with its line type, carrier and, for US numbers, Do Not Call status, for 1 credit a number: $0.00495 on the Starter plan. The free bulk checker shows one row of the results file first, and the 7-day free trial opens the upload.
Start a 7-day free trialNo payment today.
These are the steps.
- Put one number per row in a CSV, with the country code on numbers from outside the US.
- Try one number in the free bulk checker to see a row of the results file.
- Start the 7-day free trial, upload the file on the batch upload page and pick the column that holds the numbers.
- Download your own file back with the line type, carrier and location columns added to every row.
- Numbers from outside the US are checked too: the Do Not Call column reads N/A for them, because that list is US only.
See one row of the results file with our free bulk phone number checker.
To run it from your own software, see the phone validation API.
These are the next questions buyers ask.
- How do I clean my phone list before an SMS campaign?
- How much does a phone validation lookup cost with 1Lookup?
- What is the best HLR lookup service to check if a mobile number is active?
See all the questions answered in the help section.