How to map stock ticker symbols to ISIN (International Securities Identification Number)?

Question

How can I can convert ticker symbols (which include information on the exchange) to an International Securities Identification Number (ISIN) (which contains no information on the exchange)?
Also I am interested in the other way round — given an ISIN and a market identification code (MIC) how can I determine the ticker symbol?
Any databases around?

Indian Rediff · Accepted Answer

There is no simple way to convert an ISIN into a stock ticker symbol. The only way to even attempt to do so is to map the ISIN to a CUSIP or SEDOL or other national identifier and then map that identifier to a stock ticker symbol.

Correct answer by Indian Rediff on December 20, 2020

John Wood · Answer

It is possible to make a REST API call to OpenFIGI providing the ISIN to get the ticker in the response.
Python code for getting ticker for ISIN=US4592001014:
import requests

url = 'https://api.openfigi.com/v1/mapping'
headers = {'Content-Type':'text/json', 'X-OPENFIGI-APIKEY':'myKey' }
payload = '[{"idType":"ID_ISIN","idValue":"US4592001014"}]'

r = requests.post(url, headers=headers, data=payload)

How to map stock ticker symbols to ISIN (International Securities Identification Number)?

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