List number area codes
Lists current provider coverage for US local numbers, sorted and deduplicated. Coverage does not guarantee inventory carrying every required feature. New area-specific purchases must use a listed code; accepted purchases keep waiting if coverage later changes. Requires platforms:read for the path project.
Authorizations
Account Service Key, prefixed with pho_ask_, sent as Authorization: Bearer <key>. Acts on behalf of its owning account, subject to the permissions and credential restrictions of each operation. Account access tokens and OAuth grants also use the Bearer header. In organizations that require SSO, Account Service Keys are not accepted for managing the organization's SSO settings, deleting the organization, or checking whether it can be deleted.
Path Parameters
Query Parameters
"US"