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I think I found my own answer,

I switched the links to the tel: format and wrapped them in Schema.org markup, and that seems to be working,  When I re-crawled the 404's went down and I'm not seeing them anymore. Still waiting on October 25th data dump to see if my DA goes back up.

I'm not sure which one resolved the issue though.

We are having this same problem our callto links are appearing as duplicate content relative links on the pages they are clicked from and they are returning 404 errors in the MOZ crawl.  Has anybody found an answer to this question about proper formatting for callto / tel links?

So, the information I'm getting that those links are being crawled as 404s is false? Why doesn't MOZ ignore callto links so they don't populate our reports with bad data if they aren't actually being read as 404s?  What other data in my reports is false?  You can see how this solution is troubling, right?

I changed the callto: links to tel: links in the footer and nofollowed them and my domain authority dropped 2.  I'm assuming this is because we lost 2.8K "external links"  Advice on how to remove 404s for Phone#'s without affecting DA?  Will just using the tel: format stop Moz from crawling them as 404's?  It was adding links to the 404 list that look like this: www.ocp.org/missals/callto:########### I assumed it was because to the crawlers the links looked like relative links this is what our links look like now:

<a <span="" class="html-tag">href</a><a <span="" class="html-tag">="</a>tel:###########" rel="nofollow" title="Call us">###########

Old footer links:

<a <span="" class="html-tag">href</a><a <span="" class="html-tag">="</a>callto:###########" title="Call us">###########