Vanity Plates

Is this vanity plate a reference to guitar tablature or to the web site? Since the web domain is owned by someone in California, it’s not at all likely with a Maryland vanity plate, but it’s possible. I’m going with tab on this Nissan Titan King Cab’s vanity plate because about 28,000 results show up on Google in my search for 777×777 and more than 25% of them are related to guitar tablature.