Ha hello the mobile number already exist in our google spreadsheet list checking possible

[Still-learning (1-2-3-4...)]

thats why i suggest you to use gviz

https://docs.google.com/spreadsheets/u/0/d/
1TlzXWt6AlV6iMQRjnZxSMbUAu-tASm088rRiisd5VrA
/gviz/tq?tqx=out:csv&tq=select A where A=