STIR/SHAKEN statistics from November 2024

The November 2024 STIR/SHAKEN and robocall statistics are now available. The data show the latest trends in robocalls, STIR/SHAKEN participation, and attestation level usage. Let’s have a look.

Signed robocalls by attestation level

Robocalls down slightly

Figure 1. Signed Robocalls by Attestation Last 6 Months

Figure 1 shows signed robocalls by attestation level over the past six months. The numbers were down slightly from October, mostly from a 2.2% drop in robocalls signed with a B-level attestation.

STIR/SHAKEN participation and coverage

We measure STIR/SHAKEN participation changes in two ways:

1. The number of Originating Service Providers (OSPs) signing calls received by our customers,
2. Service providers authorized to do SHAKEN by the STI Policy Administrator (STI-PA),

SHAKEN signing level

Figure 2. Monthly Number of OSPs Sending Signed Calls

Figure 2 shows the number of Originating Service Providers (OSPs) observed signing calls was level with the previous month.

The number of SHAKEN-authorized providers level

Figure 3. STIR/SHAKEN Authorized Providers by Month

Figure 3 shows the number of SHAKEN authorized providers. There was a slight increase in November of less than 1%. We’ll call it level.

These two measures show that the STIR/SHAKEN participation was level in November.

STIR/SHAKEN coverage

Signed calls at termination down

Figure 4. The Percentage of Signed Calls at Termination Last 6 Months

Figure 4 shows the percentage of signed calls at termination for the past six months. This statistic was 47.0% in November, down 2.4% from October. This was a surprise, as it was the largest monthly drop in SHAKEN coverage that we’ve observed over more than three years of collecting these statistics.

Calls by attestation level

Figure 5. Percentage of Calls with SHAKEN Attestation Levels Last 6 Months

Figure 5 shows the percentage of calls signed by attestation level. Calls signed with full A-level attestation were 30.8% in November, down slightly from 31.4% in October. Calls signed with B-level attestation were 4.1%, down slightly from 4.7% in October. Calls signed with C-level attestation were 9.4%, down 1.5% from 10.9% in October.

Patterns among prolific robocall signers

Here are robocall and attestation statistics for the top 10 SHAKEN-authorized providers ranked by the percentages of signed calls identified as robocalls.

Robocalls from prolific robocall signers increase

Figure 6. Robocall Percentage by Attestation—Prolific Robocall Signers by Robocall %

Figure 6 shows robocalls authenticated by the top 10 robocall signers ranked by robocall percentage over the past six months. The top 10 signers changed in November, and the new top 10 are more prolific robocall signers than the previous group.

In November, the robocall percentage for calls signed with A-level attestation by the top 10 prolific robocallers was 81.5%, up from 78.1% in October. Prolific robocalls for calls signed with B-level attestation was 60.0%, up from 58.7% in October. These signers authenticate very few calls with C-level attestation.

Calls from prolific robocall signers

Figure 7. Call Percentage by Attestation—Prolific Robocall Signers

Figure 7 shows the percentages of calls signed by the top 10 robocall signers by authentication level. In November, they signed 89.9% of their calls with A-level attestation, 7.0% with B-level attestation, and 3.1% with C-level attestation.

Recap

• Robocalls were down slightly.
• STIR/SHAKEN participation was level.
• STIR/SHAKEN coverage was down 2.4%, the largest monthly drop we’ve observed. This was a surprise.
• The percentages of robocalls signed by the top 10 prolific robocall signers were up for calls signed with A-level attestation.

TransNexus solutions

TransNexus is a leader in developing innovative software to manage and protect telecommunications networks. The company has over 25 years of experience in providing telecom software solutions including branded calling, toll fraud prevention, robocall mitigation and prevention, TDoS prevention, analytics, routing, billing support, STIR/SHAKEN, and SHAKEN certificate services.

Contact us today to learn more.