Calling this number doesn't work at all, even though it's listed as an OpenTable number. Contacting OpenTable by phone usually isn't a great idea anyway, but calling this number didn't even begin to work.
When I dialed, all I got was a message that said, "This number is not currently operational. Goodbye." There was no ability to get to another number, no automated system to work with, not even a confirmation that you've reached OpenTable. This number appears to have been disconnected, or it simply just doesn't work.
Strangely, this number is listed on OpenTable as a real option. It's supposed to be the number for support with gifts, as listed on OpenTable's question and answer section of its website. No dates and times are listed, suggesting that this number should work at any time of the day. Instead, it doesn't work at all.
Another hit on a search of this phone number brings up the legal page of OpenTable, which suggests that anyone who's having an issue with a gift card needs to call this number. By doing so, a person should be able to reach someone who can help if this number is to be believed. But for whatever reason, the number offers no assistance whatsoever.
Other hits on search engine results suggest that this number was once used by Treatful, which was once a gift card startup that allowed people to send gift cards and certificates to anyone in the United States. But OpenTable acquired Treatful in 2012, 12 years before I attempted to dial this number. While some acquisitions do take years, it seems unlikely that such an acquisition would still be ongoing over a decade after it was completed. More likely, OpenTable simply disconnected the number at some point and forgot to update its pages that it was doing so.
Based on this lack of interaction, there is no reason to use this number for anything. If this was a legitimate OpenTable number, and evidence says that it was, it seems OpenTable has completely abandoned it. However, given that it still shows up on OpenTable's website, this results in a confusing situation for customers. The best thing for a person to do if they have questions about gifts seems to be to call the main English number of 1-866-941-8494 and address any gift card questions that way. That might lead to longer wait times, but at least they should be able to get someone on the phone.
Additionally, OpenTable suggests a person can e-mail gifts@opentable.com and try to connect with someone that way. That might lead to a longer wait, but it's likely someone will get a response. Using this number won't offer a response at all.