Need help finding some old stock charts

that are delisted or no longer in existence. For example, DSL.NET INC, which has a CUSIP # 262506108. I tried few sources that matches stocks by cusip, but some of these old stocks don't show. I'm trying to clear few things with the IRS, so if you know how this can be done, please help me out.
 
Were they listed securities and if so what exchanges?

Quote from forsalenyc:

that are delisted or no longer in existence. For example, DSL.NET INC, which has a CUSIP # 262506108. I tried few sources that matches stocks by cusip, but some of these old stocks don't show. I'm trying to clear few things with the IRS, so if you know how this can be done, please help me out.
 
If they were listed on major exchanges the Times and other publications have their papers on microfiche or other media.

Quote from forsalenyc:

that are delisted or no longer in existence. For example, DSL.NET INC, which has a CUSIP # 262506108. I tried few sources that matches stocks by cusip, but some of these old stocks don't show. I'm trying to clear few things with the IRS, so if you know how this can be done, please help me out.
 
Quote from forsalenyc:

that are delisted or no longer in existence. For example, DSL.NET INC, which has a CUSIP # 262506108. I tried few sources that matches stocks by cusip, but some of these old stocks don't show. I'm trying to clear few things with the IRS, so if you know how this can be done, please help me out.

Try contacting some of the historical data sites like tickdata.com. You should be able to find out quickly if they have what you need.
 
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