Who Owns (510) 657‑0447?

This phone number is associated with Duffy Dennis V, Sandi A Duffy and 6 others. Phone ownership information is based on public records and user-submitted data. For the most accurate and up-to-date information about the owner(s) of this number, check the Owner Records section.

This phone number is serviced by AT&T. Phone carriers are the companies that provide telephone services to customers. Knowing the carrier can help identify the source of calls and determine if a number is legitimate.

This phone number is associated with Oakland, CA; Fremont, CA and 8 other location(s). Phone numbers are typically associated with specific geographic regions based on their area code and prefix, though mobile and VoIP numbers can be used anywhere.

This number is classified as a Landline phone. Understanding the phone type helps determine if it's a fixed landline at a specific location, a mobile/cellular phone that can be used anywhere, a VoIP line (internet-based phone service), or a specialized number like toll-free or premium rate.

Based on our records, this number has not received spam reports. This suggests the number is likely legitimate, but always exercise caution with unfamiliar callers. Remember that spam reports are user-submitted and may not reflect all instances of unwanted calls. Many legitimate businesses use phone calls for customer service and appointment reminders.