How do I test if my caller ID is marked as spam?

Enter your number in the caller ID test above. You'll see its current reputation, spam score and any consumer complaints filed against it, the same data carriers and blocking apps use to label calls.

Why are my outbound calls labeled Spam Likely?

High dial volumes, short call durations and consumer complaints get numbers flagged by analytics engines. Once flagged, answer rates collapse. Testing your numbers shows which ones are burned before your connect rates tell you.

Can I monitor my numbers' reputation automatically?

Yes. The DID reputation monitoring API checks each number against 12 reputation sources in one call and returns which ones flagged it. Run it on a schedule for every outbound number and file remediation with the exact source before campaigns suffer.

What do I do if my number is flagged?

Rotate to a clean number, fix the calling pattern that caused complaints, and monitor the old number until its 15-day rolling history clears. The API shows complaint subjects so you know what consumers reported.

Caller ID test: check your number's spam reputation

A free caller ID test for any phone number. See what carriers and blocking apps see: reputation, spam score and consumer complaints. Instant, no signup.

Checks reputation, spam score and complaint history in seconds.

79%

of unidentified calls go unanswered. A flagged number is a dead number

60s

data freshness, so you see new flags as they happen

15 days

of complaint history with subjects, dates and robocall flags

Don't test once. Monitor.

A number gets flagged mid-campaign, and answer rates collapse before anyone notices. The DID reputation monitoring API checks every outbound number against 12 reputation sources on a schedule and tells you exactly which one flagged it, so remediation goes to the right place the first time.

See the monitoring API

GET /api/lookup/+18775551234 200 OK

{
  "phone": "+18775551234",
  "reputation": "SPAM",
  "spam_score": 87,
  "total_complaints": 12,
  "complaints": [
    {
      "Subject": "Warranty & protection plans",
      "RecordedMessageOrRobocall": "Y",
      "ViolationDate": "2026-06-29"
    }
  ]
}

Caller ID test questions

Keep your numbers clean

Monitor every outbound number with the Caller ID API. Plans from $25/month.

Get an API key