Only Level 3 will show up on the official PSTN databases. But Level 3 has a customer called Jivetel (my DID provider) who has a customer called Septrivium (my company) who has a cusomer called David (me). For example, you can look up my home number (against the LERG or NPAC databases) and see that Leve 3 owns it. Now keep in mind that the 'chain' of numbers can be weird. This is why I always say make sure your phone number is clearly printed on the invoice, it proves the number is yours. But they can - and will - deny the LNP request for things like a missing comma fom your CSR (customer service record). The FCC mandates that the losing carrier in a port can not deny the port - even if for financial reasons (bill not paid). A voip provider can say they are providing a service for 'entertainment purposes only' and you are only 'licensing the usage of their system' or other shady games, which will make porting the number out a nightmare. VoIP providers - technically if they play by the rules, you own it.

Make sure your invoice from your telco has that phone number printed clearly on the invoice. With ILECS and well behaved CLECs, you - as the customer of record - own that phone number.

Who owns viber now