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. Poll the Caller ID API on a schedule for each outbound number and alert when reputation drops or complaints appear, so you can rotate or remediate numbers 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

See what carriers and blocking apps see: reputation, spam score and consumer complaints for any phone number. Free, 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. Poll the Caller ID API for every outbound number on a schedule and alert the moment reputation drops or a complaint lands.

Start monitoring

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.

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