The getaddressesbylabel RPC returns the list of addresses assigned the specified label.
getaddressesbylabel "label"
*bitcoin-cli help getaddressesbylabel
getaddressesbylabel "label" Returns the list of addresses assigned the specified label. Arguments: 1. "label" (string, required) The label. Result: { (json object with addresses as keys) "address": { (json object with information about address) "purpose": "string" (string) Purpose of address ("send" for sending address, "receive" for receiving address) },... } Examples: > bitcoin-cli getaddressesbylabel "tabby" > curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getaddressesbylabel", "params": ["tabby"] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/