This is Goldfish Locum Tenens for doctors. They have well over 25 different phone numbers they use, mostly 469-277-1010 thru 1030. The 2516 is a new one.  I guess they bought a block of numbers in the 2500 range.  Then they want docs to call back "one way or the other" about availability.  Yeah, like I'll pay for a long distance call to let them know to go away . . .