Key Findings
Of the high-complaint scam phone numbers in ScamVerify's database (those with 10+ FTC complaints), 40,175 have a 100% robocall rate. Every single complaint against these numbers reports a pre-recorded message with no live operator. Together, these fully automated lines have generated 708,268 FTC complaints, nearly a third of all high-complaint volume in our dataset. ScamVerify™ calls these pure robocallers: phone numbers that exist solely as automated message-delivery endpoints, cycling through pre-recorded pitches at volumes only machines can sustain. One pure robocaller, (316) 282-5238, accumulated 441 complaints in just 22 days (20 complaints per day) pushing medical prescription scams. Another, (407) 607-7191, received 75 complaints in a single day.
Robocall Rate Tiers: How the Ecosystem Breaks Down
Not all scam calls are robocalls. Splitting the database by automation rate reveals how the scam phone ecosystem is structured:
| Automation Tier | Numbers (10+ complaints) | Total Complaints | Avg per Number |
|---|---|---|---|
| 100% (Pure Robocall) | 40,175 | 708,268 | 17.6 |
| 90 to 99% | 5,895 | 203,727 | 34.6 |
| 75 to 89% | 9,545 | 283,314 | 29.7 |
| 50 to 74% | 14,178 | 391,871 | 27.6 |
| Under 50% | 45,624 | 891,182 | 19.5 |
The table reveals a paradox: pure robocallers are the largest group by number count but generate the fewest complaints per number (17.6 vs 34.6 for the 90 to 99% tier). The explanation is operational lifecycle. A 100% automated number gets flagged, blocked, and rotated out faster than a number that mixes in live-operator calls. Carrier STIR/SHAKEN systems are specifically calibrated to detect and flag pre-recorded message patterns, which shortens the useful lifespan of a pure robocall number.
The most complaint-intensive numbers are in the 90 to 99% tier: mostly automated but with occasional live-operator follow-up. These numbers survive longer in the ecosystem because the intermittent human interaction makes automated detection harder. This is also the tier where the most dangerous scam conversions happen, because a victim who "pressed 1" on a robocall pitch is then transferred to a live operator who closes the fraud.
The Top 10 Active Pure Robocallers in 2026
Filtered to numbers with a 100% robocall rate, 50+ complaints, and activity in 2026:
| Phone Number | Complaints | Days Active | Rate/Day | Primary Pitch | Last Active |
|---|---|---|---|---|---|
| (407) 607-7191 | 75 | 1 | 75.0 | Impersonation | Mar 9 |
| (229) 363-7951 | 104 | 4 | 26.0 | Debt reduction | Apr 7 |
| (316) 282-5238 | 441 | 22 | 20.0 | Medical prescriptions | Apr 10 |
| (315) 208-3958 | 75 | 40 | 1.9 | Debt reduction | Mar 9 |
| (786) 486-3375 | 89 | 47 | 1.9 | Debt reduction | Apr 14 |
| (315) 215-8010 | 69 | 46 | 1.5 | Debt reduction | Mar 21 |
| (917) 553-6029 | 55 | 36 | 1.5 | Debt reduction | Apr 10 |
| (773) 801-3815 | 147 | 112 | 1.3 | Dropped call | Mar 31 |
| (214) 606-0242 | 422 | 644 | 0.7 | Mixed | Apr 3 |
| (602) 689-0433 | 65 | 113 | 0.6 | Debt reduction | Apr 11 |
Three numbers deserve individual attention for what they reveal about how pure-robocall operations work.
Case Study 1: (407) 607-7191: 75 Complaints in One Day
On March 9, 2026, phone number (407) 607-7191 generated 75 FTC complaints in a single calendar day. All 75 complaints report a pre-recorded message impersonating a government agency. The number appeared, ran a massive volume campaign for less than 24 hours, and then went dark permanently.
This is the "single-day burn" pattern: the operator activates a VoIP number at the start of a business day, dials tens of thousands of consumers (at an estimated 1-in-500 to 1-in-1000 FTC reporting rate, 75 complaints implies 37,500 to 75,000 actual calls), and deactivates the number before carrier flagging can propagate. The 407 Orlando area code was likely chosen to exploit the legitimate-local effect our 407 Orlando analysis documented.
Case Study 2: (316) 282-5238: The 441-Complaint Medical Robot
This Wichita, Kansas area code number ran a medical prescription robocall campaign from March 19 to April 10, 2026, accumulating 441 complaints at a rate of 20 per day. Of the 441 complaints, 434 (98.4%) specify medical and prescriptions as the subject. This is a single-category, single-purpose automated line with no diversification.
The 22-day active window is unusually long for a pure robocaller. Most get blocked in 3 to 7 days. A 22-day run suggests either (a) the VoIP provider was slow to respond to carrier flagging, (b) the operation used a legitimate-appearing business registration to resist takedown, or (c) the medical prescription pitch generates fewer "press 1" responses than debt or impersonation, resulting in a lower flagging signal despite high complaint volume.
Case Study 3: (214) 606-0242: The 644-Day Survivor
This Dallas number has been generating complaints since June 28, 2024, totaling 422 complaints over 644 days (0.7 per day). That is an extraordinarily long operational life for a 100% robocall number. Most pure robocallers last days to weeks, not nearly two years.
Complaint subjects are mixed: "No Subject Provided" (179), impersonation (102), debt reduction (85), "Other" (36), tech support (10). The diversity of complaint categories suggests this number may be used as a shared outbound-caller-ID across multiple scam campaigns, recycling the same VoIP endpoint for different pre-recorded scripts depending on the day.
Why Pure Robocallers Matter
Pure robocallers represent the most automated and scalable layer of the scam phone ecosystem. Their significance goes beyond their own complaint volume:
1. They are the top of the funnel. A pure robocall line dials thousands of numbers per hour with zero labor cost. Its only purpose is to identify consumers who will "press 1." Those consumers are then transferred to live-operator call centers that run the actual fraud. Without the automated front end, the call centers would be uneconomical.
2. They burn through phone-number inventory. The 40,175 pure robocall numbers in our database represent phone numbers that have been permanently consumed and discarded. Each one was a valid U.S. phone number that is now flagged in carrier databases and effectively unusable. At current growth rates, the scam ecosystem consumes approximately 15,000 to 20,000 new phone numbers per quarter.
3. They generate the data that makes detection possible. Ironically, pure robocallers are the easiest to detect because their 100% automation rate creates a clean signal. The more dangerous numbers (90 to 99% tier) are harder to flag because the occasional live-operator call creates noise in carrier detection algorithms.
The STIR/SHAKEN Gap
STIR/SHAKEN, the FCC-mandated caller-ID authentication framework, is designed to flag spoofed calls. It works well against pure robocallers: when every call from a number is pre-recorded and spoofed, the attestation failure is consistent and detectable. But three gaps in current deployment benefit pure robocallers:
1. Small carriers and rural providers have weaker implementation. STIR/SHAKEN compliance is not uniform. Calls originating or terminating through non-compliant carriers retain spoofed IDs even when the calling number would otherwise be flagged.
2. Attestation is origin-only. STIR/SHAKEN verifies that the call originated from an authorized party but does not analyze call content. A pure robocall from a VoIP provider that legitimately assigned the number receives a valid attestation despite being fraudulent.
3. Blocking is carrier-dependent. Even when STIR/SHAKEN flags a call, the decision to block, label "Scam Likely," or pass through is up to the receiving carrier. Policies vary widely.
What You Can Do
- Enable carrier-level spam filtering. Verizon Call Filter, AT&T Call Protect, and T-Mobile Scam Shield are free services that leverage STIR/SHAKEN data to flag or block pure robocall numbers. Enable the highest blocking level your carrier offers.
- Never press 1. The entire pure-robocall model depends on consumers engaging with the recording. Pressing any key confirms your number is active and triggers a live-operator transfer or re-dial.
- Do not call back. Some pure robocallers use intentional "missed call" or "dropped call" patterns (147 complaints against (773) 801-3815, a dropped-call specialist). The goal is to trigger a callback that reaches a live scam operator.
- Check suspicious numbers on ScamVerify's phone lookup to see robocall percentage and active-ring membership before deciding whether to engage.
- Report every robocall to the FTC at ReportFraud.ftc.gov. Pure robocallers are the easiest category to enforce against because the evidence (pre-recorded message, no live agent) is unambiguous.
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FAQ
What makes a "pure robocaller" different from a regular robocall?
ScamVerify classifies a phone number as a pure robocaller when 100% of FTC complaints against that number report a pre-recorded message with no live operator at any point in the call. Many scam numbers have robocall rates of 70 to 90%, meaning some calls involve live agents. A pure robocaller never does. The call is always pre-recorded, always automated, and exists purely to filter for responsive consumers.
How can one number get 75 complaints in a single day?
At estimated FTC reporting rates of 1 in 500 to 1 in 1,000, 75 complaints in one day implies 37,500 to 75,000 actual calls placed from that number. Modern VoIP autodialer systems can place 1,000+ calls per hour per line. A single VoIP endpoint running for 8 to 10 hours can reach the volume implied by 75 same-day complaints.
Why do pure robocallers generate fewer complaints per number than the 90 to 99% tier?
Pure robocallers trigger carrier STIR/SHAKEN detection faster because every call from the number has the same pre-recorded signature. This shortens the operational window before the number is blocked. Numbers in the 90 to 99% tier mix in occasional live-operator calls, which creates detection noise and extends the number's useful life. Longer life means more complaints accumulate.
Are pure robocalls illegal?
Yes, in nearly all cases. Under the Telephone Consumer Protection Act (TCPA), pre-recorded calls to consumers without prior express written consent are illegal. Exceptions exist for informational calls from healthcare providers, schools, and government agencies, but none apply to the debt-reduction, medical, and impersonation pitches that dominate the pure-robocaller category. Penalties are $500 to $1,500 per violation.
Can AI voice cloning make robocalls harder to detect?
Yes, this is an emerging threat. Pre-2025 robocalls typically used obviously synthetic or low-quality recorded voices. Current AI voice synthesis can produce human-quality speech that makes automated calls harder for both consumers and carrier algorithms to distinguish from live-operator calls. This could shift volume from the easily-detected 100% tier toward the harder-to-detect 90 to 99% tier, reducing the effectiveness of STIR/SHAKEN flagging.
What is the (214) 606-0242 number and why has it survived 644 days?
The 644-day operational life of this Dallas-area number is an outlier. Most pure robocallers survive days to weeks. The likely explanation is that the number is registered to a business entity that has resisted takedown requests, or that its 0.7-complaints-per-day rate flies under the threshold used by most carrier blocking algorithms. Its mixed complaint categories (impersonation, debt, tech support) suggest it serves as a shared outbound ID for multiple campaigns, which may also delay detection.
