Your ad account is learning from dead phone numbers (free audit prompt inside)

Most lead-gen accounts fire the conversion on the form fill. So Google and Meta learn to buy more form fills, junk included.

Across more than 1 million web lead phone numbers we've called, about 1 in 5 never ring. Disconnected, mistyped, fake, or recycled.

Three things I learned the expensive way:

1. Phone-validation APIs don't fix it. In our data, the two leading ones caught about 20% of dead numbers and flagged 5–7% of real buyers as bad. You keep most of the junk and throw out good leads.
2. The first call is the real validation. The phone network answers every call attempt with a SIP code within seconds, and a 404 or 604 means the number doesn't exist. Fire the conversion on a connected call, not the form.
3. Don't start by optimizing on the bottom of the funnel either. Meta wants about 50 events per ad set per week, and 50 transfers is slow and expensive. Right-party contact or qualified lead gives you the volume with a clean signal. Move down the funnel once volume allows.

I watched this compound on $5.4M of Meta lead spend. Dead numbers counted as conversions went from 10% to over 25%, because the algorithm kept finding cheaper junk.

The full write-up covers SIP codes, event mapping for Google, Meta and TikTok, why human dispositions break offline conversions, and grading live transfers instead of trusting call timers: plura.ai/guides/ai-offline-conversion-tracking

If you run paid lead gen, paste this prompt into Claude, ChatGPT or Gemini. It interviews you and scores your conversion setup:

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You are a paid media and attribution auditor. I run lead generation campaigns, and I want to know whether my conversion tracking is training my ad accounts correctly.

Ask me one question at a time about:

1. Which event I currently fire as a conversion on each platform I buy on (Google Ads, Meta, TikTok, Microsoft, LinkedIn, X).
2. Whether I capture click IDs (gclid, gbraid, wbraid, fbclid, _fbc, _fbp, ttclid, msclkid, twclid, li_fat_id) and hashed email and phone with every lead.
3. What share of my leads are bad phone numbers, and how and how fast I find out.
4. Whether I use pre-call phone scoring, and whether I've measured how many good numbers it wrongly flags.
5. Which post-lead outcomes I send back (contact, right party, qualified, transfer, appointment, sale), how fast, and who records them.
6. How consistent my dispositions are across agents and shifts.

Then give me:

• A score out of 10 for my conversion setup.
• The three biggest gaps, ranked by likely wasted ad spend.
• A stage-by-stage event plan, including which event each campaign should optimize toward today.

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What event are you actually optimizing on right now: the form fill, the call, or something further down?