STIR/SHAKEN statistics from July 2024

The July 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 almost unchanged from the previous month. Robocalls were down 0.05% for calls signed with A-level attestation, down 0.2% for calls signed with B-level attestation, and up 0.2% for calls signed with C-level attestation. Overall, robocalls were up 0.05%.

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. This number remains 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. We saw a slight increase of eight additional SHAKEN-authorized providers in July.

These two measures show that the STIR/SHAKEN participation remained level.

STIR/SHAKEN coverage

Signed calls at termination up

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 48.1% in July, up 2.4% from 45.7% in June. After slowly crawling upward for the past three years, this number has jumped 9% in the past two months. Very encouraging!

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 30.3% in July, up slightly from 29.5% in June. Calls signed with B-level attestation were 3.8%, down from 3.9% in June. Calls signed with C-level attestation increased to 11.6% in July, up from 10.3% in June. There’s been a sizeable jump in calls signed with C-level attestation over the past two months.

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 down

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

Figure 6 shows robocalls authenticated by the top 10 robocall signers over the past six months. In July, these robocall percentages were down 34.5% for calls signed with A-level attestation and down 15.4% for calls signed with B-level attestation. The robocall percentage for all calls among the top 10 robocall signers was down 32.6%.

The top 10 prolific robocall signers authenticate almost no calls with C-level attestation. That’s why the blue line is so erratic.

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 July, they signed 91.1% of their calls with A-level attestation, 8.6% with B-level attestation, and 0.3% with C-level attestation.

Recap

• Robocalls continued a downward trend from April.
• STIR/SHAKEN participation was level.
• STIR/SHAKEN coverage was up 2.4%, following a 6.6% increase in June.
  • Most of the additional signed calls were authenticated with C-level attestation.
  • Despite this jump, the percentage of C-level robocalls dropped 5.8%.
• The percentages of robocalls signed by the top 10 prolific robocall signers continued a sharp downward trend from May.

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.