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