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This badge means the number appeared in a public FTC Do Not Call complaint dataset we imported — not a live registry check and not proof the caller violated the law. See DoNotCall.gov for official registry information.
Spam score 100/100
Last searched June 16, 2026
Standard US geographic line. We do not display carrier assignments — area codes can be spoofed and are not proof of who is calling.
High Risk
Total searches
1
Community reports
1
Community snapshot
Most reported as: Other
Community sentiment: Mostly spam (100% negative tags)
Tags reflect user experiences on CheckThatCall, not confirmed caller identity.
Based on CheckThatCall directory activity only — not verified call frequency or carrier records.
Based on 1 community reports, phone number (510) 721-2381 is frequently tagged as Spam with a strong association to Other calls. Approximately 100% of reports classify this number as spam or scam activity. Community data suggests exercising caution — consider letting the call go to voicemail and verifying any claims through official channels before responding.
Phone number (510) 721-2381 uses area code 510, which is commonly associated with Oakland, California. Keep in mind that scammers frequently spoof local area codes to appear trustworthy — the displayed area code alone does not confirm who is calling.
(510) 721-2381 is a standard US geographic number. Local area codes can be spoofed, so the displayed digits do not prove who is calling or where they are located.
The first community report for (510) 721-2381 was submitted on June 16, 2026. Additional tags help refine the spam score over time.
Blocking (510) 721-2381 stops repeat rings from the same caller ID. Spoofed scam numbers may change — combine blocking with lookup and carrier filters.
For more steps after an unwanted call, see our spam call checklist.
Our community spam score for (510) 721-2381 is 100 out of 100, based on 1 structured report. This is an estimate from user tags, not a verified legal finding.
(510) 721-2381 has been looked up 1 time on CheckThatCall. Search volume reflects user interest, not call frequency.
If you do not recognize (510) 721-2381, let the call go to voicemail. Do not call back unless you verify the caller through a trusted source. You may block the number on your phone.
(510) 721-2381 uses area code 510. Remember that scammers can spoof area codes to appear local — the area code does not prove caller identity.
(510) 721-2381 is classified as a standard geographic number in the North American Numbering Plan. Number type alone does not indicate whether a caller is legitimate.
The most common community tag for (510) 721-2381 is Other. Overall sentiment is spam. Tags reflect caller experiences, not confirmed identity.
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