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) json object with addresses as keys "address" : { (json object) json object with information about address "purpose" : "str" (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/