同樣方法打電話到 NSC representative 回複：技巧:打電話到TSC向representative詢問,他們有用的

I tried the same number and was able to talk to a very nice NSC representative about background check. She was more informative than the national CS representative, but still was not able to provide more details than what I expected. I guess your SRC number will direct your call to the right service center representative.