STIR/SHAKEN statistics from January 2025

The January 2025 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 level

Figure 1. Signed Robocalls by Attestation Last 6 Months

Figure 1 shows signed robocalls by attestation level over the past six months. The overall numbers were level with December. Robocalls among calls signed with B attestation were down, while robocalls among calls signed with C attestation were up.

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 of 1.3% in January.

STIR/SHAKEN coverage

Signed calls at termination level

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 dropped 1.9% in January, to 45.3%. This continues a gradual decline from October 2024.

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 29.3% in January, down 2.3% from 31.6% in December. Calls signed with B-level attestation were 4.2%, up slightly from 3.8% in December. Calls signed with C-level attestation were 8.9%, level with December.

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 January, the robocall percentages among prolific robocall signers were down 6.2% across all attestation levels. There was a similar drop in robocalls across all attestation levels.

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. They continue to sign their calls mostly with A-level attestation.

Recap

• Robocalls were level, with a small increase in robocalls signed with C attestation and a similar drop in robocalls signed with B attestation.
• STIR/SHAKEN participation was level.
• STIR/SHAKEN coverage continues a gradual decline from a peak in October 2024.
• The percentages of robocalls signed by the top 10 prolific robocall signers were down an average of 6.2% across all attestation levels. These signers continue to sign most calls 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.