FPL can't dial 613-581-xxxx

[FPLOttawaUser]

I can call any number in the world it seems (free for FPL supported ac/exchanges) and from my World Credit for toll calls.
HOWEVER, I cannot call *ANY* number it seems in the 613-581-xxxx block (in particular numbers assigned to Public Mobile).

The ATA is just fine
- have called various numbers in Italy this morning no problem.
- have called various local Ottawa numbers just fine this morning
- have called a couple of Bell Mobility numbers as well

It is *only* these 613-581-xxxx numbers that result in FPL not processing the call.
Mu OBi-110 informs that the SIP gateway is reporting back "500" (which in SIP parlance is a critical unknown error thrown up by the SIP gateway)

It is as if this exchange is not registered on the book at FPL as a legit exchange?
(If it was legit but would be considered toll, FPL would just draw down on my World Credit)

Help! How do I get FPL/Fongo to rectify dialing into this ac/exchange?

Thank you.

[Liptonbrisk]

Submit a ticket and provide them with the full phone numbers: https://support.fongo.com/hc/en-us/requests/new.
If no responds to your support ticket, provide the ticket number in a private message to Fongo Support: http://forum.fongo.com/ucp.php?i=pm&mode=compose&u=7852.

And also report the numbers here: http://forum.fongo.com/viewtopic.php?f= ... &start=125