D&B (DUNS #) worth it?

[Dean George]

Have owned a corporation for a few years, excellent credit all around.

No problems at all, just looking to continue to boost my credit worthiness in case I need a LOC or similar.

My company has a DUNS number, but I don't know if anything is reported on it.

1) Does a DUNS # do anything

2) Is D&B legitimate, or just a scam? My only interactions with D&B have both been poor. From a phone call trying to sell me a credit report, to their terrible website, they just seem shoddy.

Any advice to pursue or not?

Thanks
WC