I have contacts at Rogers, so it's their tools that say which provider and if it's a mobile or landlines. This is an Iristel or Distributel number, usually setup for VOIP services. They are also the providers for app numbers, they aren't legit service providers for mobile phones.
Phonevalidator.com
I wouldn't necessarily go that far as I've met plenty of reliable, honest ones using an app # to shield their real # from clients.
You're right that there are SPs who are usually newbies that may start with an app number before getting a second phone with a proper number. Though most reputable and legit providers dont use apps. These days all these scams followed by cartel threats are seemingly too good to be true ads, with app numbers, and usually either Hispanic or Indian listed as the ethnicity.
