Here is what I found on the Website "The roaming zone"
VERIZON WIRELESS
Note: Verizon issues several PRL's with each revision, and the one you receive depends on your plan, phone model and location. The order of roaming partners among all PRL's issued on the same date is virtually identical. PRL's in the '65000' range are generally sent to former Alltel customers who have kept their old Alltel plan.
March 15, 2012: 52686 - 52707 and others
December 8, 2011: 52631 - 52644 and others
November 10, 2011 (52608 - 52629 and others)
October 20, 2011 (Includes 52549 - 52559 and others)
September 21, 2011 (Includes 52501 - 52526 and others)
52501 Nationwide/AC II EVDO
September 15, 2011 (Includes 52418 - 52440 and others)
52418 Nationwide/AC II EVDO
June 17, 2011 (Includes 52341 - 52367 and others)
65225 - 65226 Hybrid (ex-Alltel areas)
April 28, 2011 (Includes 52297 - 52299)
52299 Nationwide/AC II EVDO
Changes with PRL 52299
March 17, 2011 (Includes 52257 - 52280):
52257 Nationwide/AC II EVDO
January 28, 2011 (Includes 52219 - 52220)
Dec. 3, 2010 (includes 52123 - 52189) Some customers report getting one PRL, then are upgraded to another a few days later.
Nov. 6, 2010 (includes 52078 - 52105)
52105 Nationwide/AC II EVDO