The email addresses, phone numbers (main Austin office), room numbers, twitter handles, and committee assignments are now published for the Senate and the House of the current Texas legislative session. There are links to these lists on the front page of ntcl.org, on the right-hand side bar, and are also available from the NTCL Resources menu on the top menu bar.
The contact lists can be filtered by committee by pressing the committee button and selecting the committee to filter by.
Columns can be hidden by pressing the show / hide columns button.
Here is a short video explaining how to copy a list of phone numbers or email addresses of all the committee members: