I was able to find hostname using service discovery example.
Output from service discovery example:
Sending EDP-GW service discovery request to https://api.refinitiv.com/streaming/pricing/v1/
EDP-GW Service discovery succeeded. RECEIVED:
........
Connecting to WebSocket wss://apac-3.pricing.streaming.edp.thomsonreuters.com:443/WebSocket for session1...
WebSocket successfully connected for session1!
SENT on session1:
.........
RECEIVED on session1:
.........
Output from market price edpgw authentication example:
('Sending authentication request with password to', 'https://api.refinitiv.com:443/auth/oauth2/v1/token', '...')
EDP-GW Authentication succeeded. RECEIVED:
..........
Connecting to WebSocket wss://apac-3.pricing.streaming.edp.thomsonreuters.com:443/WebSocket ...
[Errno 104] Connection reset by peer
WebSocket Closed