NCSHP, what/where am I listening at/to?

Ok, so I am hearing the base on 42.520(Least what it SHOULD be, what the crystal in my Regency ACT 10 R says it is), and I am unsure whether I am picking up the Gaston/Cleveland county ones, or Rockingham/Guilford. I am in China Grove/Landis. I've heard a call for US 1, and some Highway 17. JUst heard the comm center say 'H 6-4-2'. Guessing that's a unit number? Then 'H 6-4-2 Hoke county advised they'll contact Monroe shortly.', '2-3-9 10-4', '*Something* H-230', 'H-636 10-4', and '10-4, WPPK929(Or something like that, TTK? CCK?'' Were some of the transmissions I've heard. Any ideas? Also though I THOUGHT it's H- and those numbers, ears ain't used to low band and it could be 8.