FAQ
What is E.164?
It’s the international numbering format: +{countrycode}{nationalnumber} (digits only, prefixed by +).
I have local numbers without country code. What should I do?
Provide default_region (e.g. IT/US/GB). The parser can then interpret national formats.
Batch returns a CSV. How do I know what columns were added?
Look at the header row of the downloaded CSV: it contains your original columns + appended derived columns.
Tab-separated CSV
Use delimiter = empty string ("") when calling the API. In the UI choose “tab”.
Rate limiting
If enabled, read x-ratelimit-remaining and backoff when low. On 429, retry after reset.