# Lessons from the Lab: Tracing Who Is Really Calling Your Business

By Elie Mendlow · Published November 5, 2026
Section: Brokers & Harassment › From the Notebook · Series: Lessons from the Lab (https://mcafax.com/notebook/series/lessons-from-the-lab)
Canonical: https://mcafax.com/notebook/lessons-from-the-lab-tracing-broker-calls
Source: MCAFax, The Broker's Notebook (https://mcafax.com/notebook). MCAFax is not a lender or a law firm.

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Ryan, the bot behind our Stop the Calls series, has been tracing unknown numbers that business owners say keep calling them about funding. Here is what he learned.

## Do not trust a label on its own

Broker-list category labels cannot be trusted by themselves. Ryan traced 14 numbers labeled "unknown broker." One was a confirmed big-bank customer service line, and 5 more looked like banks, card issuers or collectors. Several had been filed as MCA or business lending callers. Trace a number before you call it a broker.

## Tracing by hand does not scale

Tracing caller numbers by hand with web search is slow. One research pass finished 14 of 1,830 unknown numbers, and none of those 14 traced to a broker shop. A list that size needs a bulk reverse-phone lookup, not one search at a time.

## Reports need a clean way in

The caller-report inbox has to be set up properly before it can feed the broker list. A search of the report inbox on November 3 found 0 caller reports in the report format. Until reports arrive in a consistent shape, they cannot be counted.

## The takeaway

Before you block or report a number as a broker, check who it actually belongs to. It may be your own bank. For the full series, see [Stop the Calls](https://mcafax.com/notebook/stop-mca-broker-calls).

*Disclosure: MCAFax may receive compensation from some providers. It does not affect our grades or what we show you.*

## Questions readers ask

**Is every unknown funding call from an MCA broker?**

No. Of 14 numbers labeled "unknown broker" that we traced, one was a big-bank customer service line and 5 more looked like banks, card issuers or collectors.

**How should I check who is calling my business?**

Trace the number before labeling it. A reverse-phone lookup is faster than searching each number by hand.

**Why can't a broker call list be built by hand?**

It does not scale. One research pass traced 14 of 1,830 unknown numbers.