STIR/SHAKEN statistics from September 2024

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

Signed robocalls by attestation level

Robocalls level

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 mostly unchanged from the previous month. Robocalls were up 0.03% for calls signed with A-level attestation, down 2.1% for calls signed with B-level attestation, and up 0.4% for calls signed with C-level attestation. Overall, robocalls were unchanged.

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. This number has been hovering around 980.

The number of SHAKEN-authorized providers stays level

Figure 3. STIR/SHAKEN Authorized Providers by Month

Figure 3 shows the number of SHAKEN authorized providers. There was an increase of 16 SHAKEN-authorized providers in September following a drop of 36 in August.

These two measures show that the STIR/SHAKEN participation fluctuates slightly but remains level.

STIR/SHAKEN coverage

Signed calls at termination up slightly

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 49.3% in September, up 0.7% from 48.6% in August. Getting close to 50%!

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 32.3% in September, up from 31.3% in August. Calls signed with B-level attestation were 4.1%, up from 3.8% in August. Calls signed with C-level attestation were 10.8%, down slightly from 11.1% in August.

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 level

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. In September, the robocall percentage for calls signed with A-level attestation by the top 10 prolific robocallers was 59.6%, up slightly from 59.1% in August. Prolific robocalls for calls signed with B-level attestation was 43.0%%, down from 68.5% in August. 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 September, they signed 91.7% of their calls with A-level attestation, 4.4% with B-level attestation, and 3.9% with C-level attestation.

Recap

• Robocalls were level.
• STIR/SHAKEN participation was level.
• STIR/SHAKEN coverage was up slightly, approaching 50%.
• The percentages of robocalls signed by the top 10 prolific robocall signers were level overall.

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.