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Basically, anything that isn't in your contacts is unknown.

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Q: What causes unknown number on caller id?
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Related questions

How tele-marketing companies get your home or mobile numbers. Most of time their caller ID is displayed as No number or Unknown. Can we block such calls?

Unless you're 'ex-directory' or 'unlisted' - they can get your number from the people who compile your phone book ! If the caller ID shows 'No number' or 'unknown' - it simply means the caller is using a phone connected through a switchboard (rather than a direct line).


How can you find more information about the caller?

One can find information about a caller's caller id from many different resources, which is useful in the case of frequent calls from an unknown number. Websites such as FCC provide information on this subject.


Do you have caller ID on your phone?

Today, about 99% of phones come with a caller ID service that is automatically enabled by default. When it comes to home telephones (landline) with caller ID, one could contact their phone company and opt out of the caller ID service if needed. More importantly, the caller ID feature that we have come to trust is not as secure as it was in the past. Anybody can change or fake the number that is displayed on the caller ID with a simple spoof calling card. Be careful and remember that anyone can change their caller ID number.


What is a caller ID?

Caller ID is a feature on a phone that allows the caller to see who is calling them. Other information can also be obtained based on the plan such as, their number, name, or where they are from.


How do you get a caller Id on friendcaller?

you simply eNter your number


What does spoof your number mean?

Caller ID spoofing is the practice of causing the telephone network to display a number on the recipient's Caller ID display that is not that of the actual originating station.


What does the Caller ID 1123456789 mean on your phone?

I am not sure, if the number displayed is a valid call ID number, but Caller ID displays the phone number of the person who made the call to you including the area code and phone number. From this you an identify the person calling you. If you have a phone book system in the phone and you have saved phone numbers with names, some phones will display name of the person from the address book when the caller id matches the stored number. Some times the number displayed on caller ID is not a standard phone number. Some of these calls may be from a VOIP service or from some customer service call centers (internal on the service provider network) or when the caller ID is masked by the caller or caller's network service provider. - Neeraj Sharma


How much does it cost to block caller id?

There are no fees for blocking caller ID. All one has to do to block caller ID is push *67 prior to dialing the phone number you are calling. This will block ones number from appearing on either a cellphone or land line phone


How do you get a number that is hidden to show up on your caller id?

This is not possible.


What is the meaning of 'send your caller ID' on a mobile phone?

It defines whether your phone number will be displayed on someone's caller ID unit when you call them. Select 'no' if you wish your number to remain private.


Does Dish Network have caller id?

If you are referring to whether or not the caller id ability is available on our receiver, yes it is. The caller ID ability is offered on most of the receivers we offer but there are some that do not have the ability to enable caller ID. The caller ID option will display caller information on the TV screen. In order to activate, the caller ID does requires a phone line connected to the receiver, a subscription to Caller ID service through their local phone company and Caller ID enabled in the receiver.


What does 68 on cell phone do?

If you type "*68" in front of any number, the receiver will have your call as a call from the caller ID of "Private" or "Unknown," thus hiding your identity when picking up.