TransNexus's May robocall-volume read, the monthly counterpart to the signing data

TransNexus has posted its robocall trends for May 2026, the volume-side companion to the STIR/SHAKEN signing statistics it publishes from the same dataset — signed and unsigned calls observed across the hundreds of providers using its tools. Where the SHAKEN series tracks how much traffic arrives authenticated, this one tracks how much of it looks like robocalling in the first place.

The reason to log it isn’t any single month’s figure; it’s the series. A consistent monthly read of robocall share, drawn from the same measurement vantage point, is exactly the kind of recurring dataset that becomes useful when you set it next to the others — YouMail’s volume index, the TNS annual report, the FCC enforcement cadence. Each is partial and each is measured differently; the trend only becomes legible across them.

The pairing is the point. Read the volume trend here against the coverage trend in the signing series: if robocall share holds steady while signed-call coverage stays pinned in the low 40s, that’s the empirical case that authentication is running in place — more signers, flat coverage, and the unsigned volume the system was built to suppress still getting through.