Which service are you talking about?
Current hired since 2012 Frontier to VZ
pre-2012, VZ hired to Frontier, then back to VZ again....
Or pre 200x fGTE to Verizon, to Frontier, then back to VZ again.
Pretty sure... in any event, anyone currently at Frontier should have their time bridged to VZ upon closing of the deal. However, if management... there's been no Pension at VZ since 2006. I'm sure you figured it out by now... I just found the back & forth company history amusing.