Verizon provides their FiOS customers with 2 regional DNS servers via DHCP that are geographically close to their install location. The default address given out is a ".12" address which utilizes DNS Hijacking to serve you ads from Verizon. Each region has a corresponding ".14 DNS server which does not hijack DNS. Changing to this ".14" address is the method Verizon utilizes for allowing customers to opt-out of their "DNS Assistance".
I couldn't find a complete list of these online, so with a little digging I put this together.
Regional DNS Servers, opt-in/opt-out are listed below. There are many other valid Verizon DNS servers, but these are the ones given out to customers via DHCP. If you are aware of any additional DNS servers given out via DHCP to FiOS customers, please let me know in the comments.
Boston, MA:
nsbost01.verizon.net - 71.243.0.12
nsbost02.verizon.net - 71.243.0.14
New York, NY:
nsnyny01.verizon.net - 68.237.161.12
nsnyny02.verizon.net - 68.237.161.14
Newark, NJ:
nsnwrk01.verizon.net - 71.250.0.12
nsnwrk02.verizon.net - 71.250.0.14
Philadelphia, PA:
nsphil01.verizon.net - 71.242.0.12
nsphil02.verizon.net - 71.242.0.14
Reston, VA:
nsrest01.verizon.net - 71.252.0.12
nsrest02.verizon.net - 71.252.0.14
Atlanta, GA:
nsatla01.verizon.net - 68.238.120.12
nsatla01.verizon.net - 68.238.120.14
Tampa, FL:
nstamp01.verizon.net - 68.238.112.12
nstamp02.verizon.net - 68.238.112.14
Dallas, TX:
nsdall01.verizon.net - 68.238.96.12
nsdall02.verizon.net - 68.238.96.14
Los Angeles, CA:
nslala01.verizon.net - 68.238.64.12
nslala02.verizon.net - 68.238.64.14
Seattle, WA:
nsseat01.verizon.net - 68.238.128.12
nsseat02.verizon.net - 68.238.128.14
(Added 5/5/2016)
Chicago, IL:
nschic01.verizon.net - 68.238.0.12
nschic02.verizon.net - 68.238.0.14
