There is a list of about 300 hotel brands with the hotel URL and phone number contacts in this Los Angeles Times article. The hotel chain associated with the hotel brand is included for brands like Westin (Starwood Hotels) and AC Hotels (Marriott International).
The list is fairly comprehensive for hotel brands globally including brands like mainland China’s Jin Jiang Hotels and associations like Small Luxury Hotels of the World (SLH) and Leading Hotels of the World (LHW).
The only mistake I noticed was Motel 6 is shown as part of Accor Hotels. Motel 6 was sold by Accor Hotels in 2012. The Motel 6 brand was acquired in May 2012 by Blackstone Group, the investment company that also bought Hilton, La Quinta and Extended Stay America in the past decade.
The hotel contact list is a good resource, if that is of interest to you.
Here is a sample of listings to show the format from LA Times.
Autograph Collection Independent Hotels (Marriott)
B4 Hotels (Boscolo)
Banyan Tree Hotels & Resorts
(800) BARCELO (227-2356)
Base Backpacking Hostels (Australia and New Zealand)
No central reservation number
Baymont Inn & Suites (Wyndham)
The full list can be found on the LA Times website: