This is a customer to customer forum, with a few support folks floating in from time to time...
I work extensively with WordPress, took the liberty and ran a scan of your site and it's not blacklisted on any of the major listings. It came up on my phone just fine using wifi, but if I turned off the wifi and used my 4G data connection, it timed out and wouldn't load the page. Is that what you mean by being "blocked" by Verizon?
Unfortunately, I'm just a customer and have no access to the inner workings of Verizon's IP blocking stats (if this is what's happening). I can't do more than confirm that I can't see the site using my 4G Verizon cellular connection, but I can, on the same device, using wifi.
Correct. Connected to Wifi via a mobile device it works fine, but across the mobile network, it doesn't. I've run traceroutes via multiple ISPs, and it seems that it times out somewhere in the Verizon network. This has been going on for a few months and I can't seem to find any answers. When I get time I'm going to have to call someone a little higher, because my clients are having trouble accessing their images and I can't get to my email when I'm mobile.
I have the same problem with my e-commerce sites, which are hosted by Shopify. kgear.com and eogear.com are the domains (they both redirect to https://kgear.eogear.com/). I cannot view them when off WiFi and while using my Verizon data.