For CUSIP

Capital IQ:

• To search by CUSIP, enter the CUSIP in the search box.
• To locate CUSIP, enter the company name in the search box. Then, on the company's page, click Equity Listings on the left menu.  On the Equity Listings page, click the ticker that is bold.  The main equity listing page includes the CUSIP at the top of the page.

LSEG Workspace:

• To search by CUSIP, simply type the number into the main search bar on the homepage and select the bond to load it.
• To locate a CUSIP, load a company profile by typing the name or ticker into the main search bar. Then, on the company's profile page, click on the ‘Debt & Credit’ tab and select ‘Debt Structure’. Scroll down to the ‘All Bonds by Maturity’ section, click on the desired year and select the bond. CUSIP number will be in the upper, right hand corner of the ‘Bond View’ page. 

Bloomberg:

1. To search by CUSIP, Type ID <go>
2. At prompt, type CUSIP number (ex. 594918104)  <go>
    

For D-U-N-S Numbers use Mergent Intellect: 

1. To search by D-U-N-S, click on Advanced Search.
2. Under Choose Criteria select D-U-N-S number
3. You can upload a file of D-U-N-S numbers or search by individual number.

For GVKEY use Compustat. This database has defined a proprietary identifier, the GVKEY, which can be used to track a company over time (a company name, CUSIP, or ticker may change over time).