This is a free service. Whereas the Do Not Call registry is simply a place to report unwanted calls, this site provides information about the owners of the number. Such information is reported by people who have received calls, so the site can make no claims about the accuracy of the information. It was created to help people by just providing a place to check numbers and see what experiences others may have had with callers from those numbers.

Got a call from



510-394-4921 first came on to the map on Tuesday, 11.8.2016 @ 01:19am and has been looked up 106 times.

Comments for 5103944921
let the cell phone ring twice and disconnected, didn't leave a voicemail.
Posted by Granville
Thursday, 03.2.2017 @ 19:49pm
Phoned and no answer then hung up
Posted by Adam
Tuesday, 11.22.2016 @ 20:00pm
Phoned . Left no message.
Posted by Vashti
Tuesday, 11.22.2016 @ 16:17pm
Leave comment for 510 394 4921

Your Name:*

Your Comment:*


Note: Spam will not be tolerated.

Addtional information for 5103944921

510-394-4921 is California state. Landline number from San Francisco in San Francisco issued by Teleport Comm. Group : San Francisco.

Other Comments

and you did not leave a message. I do not answer number I do not know until they leave a message most of the time. Xavier, I don't know you... Read More
saying they are on recorded line and ask if we can hear them OK. Do not say yes. Message goes on to talk about refinancing a loan.... Read More
collections company fro many banks and retail stores
They call early morning, day, afternoon and even at night
they trace debtors as well on other numbers they might... Read More
de poca vida, Ricardo.... Read More
a "friend", this number isn´t exist in my country
... Read More

Additional numbers
About has been designed to save people like you a lot of hassle, time, and money when searching for numbers. You can get great tips and advice about how to prevent harassing phone calls, how to prevent your identity from being stolen and more. This is a very interactive website built by users and the community. It is also an excellent service provider site that has been given high ratings by the users. Once you register you may visit the forum and submit a topic thread to help others like you resolve their phone call problems too. Stay up-to-date with the latest news about all types of bothersome and crime calls making the headlines. Read about the FTC reporting news like FTC: International Bogus Debt Collector Phone Scam Swindles Millions From US Residents so you can be prepared for the next call coming in to your phone. Learn what to do and where to report certain types of phone calls. You can see our privacy policy and contact details.