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You can use the panguin tool - http://barracuda.digital/panguin-tool/

Thanks for the help.  We figured it out!

Great, I'll use that as a rule of thumb in the future.  I think Moz should maybe emphasize this point as a way to think about backlink manangement.  Thanks!

Open Site Explorer only updates once a month or so. You have to figure some delay in it. The last update currently was June 9th, the next is on July 21st. You also have to figure that between updates it is compiling data the whole time as well. So if you have a link that was removed July 1st, it could still show in the next update if Rogerbot crawled the link before July 1st.