NC 512: was in place by 1922, running from its parent NC 51 (curr NC 73) at Ellerbe to NC 70-702 (curr NC 211) West End. It doesn't appear that NC 512 ever used Crawford St.
NC 512 was rerouted in 1928 to run from Ellerbe due north to NC 70 in Candor. The old 512 over to West End became US 15/NC 75 (today this is part of NC 73). It is possible NC 512 was not continued down to Ellerbe from its US 15 split meaning this is technically a 2nd NC 512.
In 1929, NC 512 was eliminated by an extended US 311 paired with the violating original NC 170. Today this is all US 220 and US 220A.

NC 512 initial routing

NC 512 shifted to Candor

NC 512 becomes NC 170