The admin interface allows you to upload phone numbers in bulk using CSV files. Once you reach the Phone numbers page, you only need to open the More menu to proceed.
When you upload phone numbers in bulk, there are three outcomes you might encounter: Invalid numbers, valid numbers, or both.
When you upload phone numbers that are deemed invalid, they will be displayed under the File errors tab, and all invalid numbers will be listed in a table. You may click on Upload new file in the error message highlighted in red at the top of the page to upload a new file. There are numerous reasons why an entry in the CSV may be tagged invalid. It could be the formatting, insufficient permissions, an invalid account ID, an invalid endpoint, or an invalid start date.
If you upload valid numbers, they will be displayed under the Valid numbers
tab, and all valid numbers will be listed in a table. Read Uploading phone numbers in bulk
to continue with your upload.
If you upload a file with both valid and invalid numbers, both the File errors and the Valid numbers tab will appear. You may edit your CSV file and upload again if you want to upload all phone numbers you have, or you may continue uploading the numbers already tagged as valid.