There is a potential workaround where we recycle a number after lebanon mobile phone numbers database N hours of inactivity and then allocate a new number if the conversation resumes. However, then we could risk breaking the continuity of the SMS conversation if the later messages start coming from a new number, and we may cause confusion when a conversation with a new business starts abruptly from the same number. Because of these considerations, we typically mark a proxy number as recyclable only after 30 days.

Therefore, we only ever need to maintain as many phone numbers as the number of connections per month, i.e., our costs scale as O(conversations per month). This is definitely an improvement, but it still requires purchasing millions of phone numbers, which means that we need further optimizations to our phone number use. Phone number reuse The idea behind proxy phone number reuse is to use the same number in multiple masking sessions simultaneously instead of it only taking part in one session at a time.