Phone Number Reporting Across North America
ex: 555-555-5555


How do telephone companies assign phone numbers?

Generally, each telephone carrier has a set of telephone numbers assigned to it by the North American Numbering Plan Administration (NANPA). You as the customer usually have the option of choosing from any of the available phone numbers assigned to your carrier when picking a phone number.

Phone carriers receive their phone numbers in blocks of 1000 or 10 000 based on their size and geographical locations. As each area code is usually associated with a particular state, carriers operating within that state would receive phone numbers from that area code.

As of June 30, 2004 phone companies must use over 75% of their assigned numbers before being given new ones.

VoIP protocol overview

VoIP, or Voice over Internet Protocol is a digital communication protocol in which phone calls are made over the internet instead of over traditional phone lines. To use this protocol, you must have what's called an IP telephone, which basically looks like a normal telephone with the exception of it being connected online. You can also use an application on your computer or cell phone such as Skype or Viber to make phone calls over the internet.

A lot of companies have begin switching to VoIP technology because of the increased flexibility, portability and features that comes with it.

Sections of a telephone number


A telephone number consists of three parts: The npa, nxx and line number, also called the area code, the exchange and the line number.

The area code and exchange numbers are given out to telephone carriers by the North American Numbering Plan Administration (NANPA), depending on their geographical locations. As such, you will usually find that each npa and nxx combination belongs to only one phone carrier. The carrier than assigns the line numbers to its customers at random, or in certain cases the customer can select his preference from a pool of available numbers.

How to block unwanted calls

Perhaps the most basic way of preventing unwanted calls is by not giving out your number to companies or individuals you prefer not to receive calls from in the first place!

Unfortunately, it's usually not as simple as that. Maybe it's an ex lover that never fully got over the relationship. Maybe it's the IRS (or someone pretending to be from the irs). Whatever the reason may be, there are two main ways to block unwanted calls.

The first is through your phone carrier directly. Most carriers have a way of completely blocking certain phone numbers from reaching you for an added monthly cost. If you're using a traditional telephone plugged on a phone line, this might be your only option.

If you have a Smart phone, the second option would be to use one of the various apps available on the iPhone and android market. For a list of some of the best phone blocker apps, please see this website:

How to encrypt phone calls and text messages

There's been a lot of conspiracy about the government tapping into our phone calls and text messages, ever since the ex CIA contractor and whistle blower Edward Snowden revealed that the US government was collecting telephone records on tens of millions of Americans.

Of course, there are various other reasons why one might want to encrypt their phone conversations, but if privacy is one of your major concerns, this is definitely something worth considering.

By default, most GSM (G2 and above) networks provides basic encryption technologies, thus preventing an impersonator from easily tapping into the call. However considering some sources have been reporting that the encryption code has been cracked and there are methods available to decrypt the information, it's worth looking into available third party encryption methods.

Perhaps one of the best encryption apps out there for android and iPhone is called Signal Private Messenger. It's an open source project that was created by Open Whisper Systems, which was recently acquired by twitter. It encrypts all phone calls and text messages that are made through the app, and best of all it's completely free.

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