Verizon is famous for having crappy outside plant records. For example, when I moved here in October, 2004 they swore up and down that service was hooked up. Plug in the phone and no dial-tone. No NID either.
So I open the terminal block, take out the butt set and start dialing the ANAC number on every pair. Not only did I find my pair, I found the NID for my apartment and the two weren't anywhere near each other, nor was the NID connected.
Called Verizon and told em' it was pair 14 and I wanted it hooked to my NID. The tech that came out had a good laugh, he said I'd stirred up a hornets nest inside Verizon's install/repair depot. Customers are NOT supposed to open terminal boxes.
But when said boxes are secured with 7/16" nuts, it isn't hard to get in.