What qualifies though? Are US Cellular, Inland Wireless, Viaero, Verizon and such whitelisted? If so, which of their operating carrier numbers are whitelisted?

What qualifies though? Are US Cellular, Inland Wireless, Viaero, Verizon and such whitelisted? If so, which of their operating carrier numbers are whitelisted? Or are they doing this the ghetto fabulous way by NPA-NXX carrier allocation without checking the current underlying LEC? More than one of the carriers I listed will sell you SIP trunking and texting on their wireless OCN, breaking most schemes of this type. Registering on a wireless number and immediately moving it to wireline or VoIP is another major threat to this model.