You will need
- - mobile or landline phone;
- - access to the Internet.
In order to know whether the changed phone number of the cellular network, call on him and ask directly responding to you. Such a method is relevant only in those cases when the number is active, and it so happens that after disconnecting the subscriber, his former room has long remained unused. In this case, the system informs you that the subscriber is out of network coverage.
If you want to know whether you have changed the user number is not available for the call, send him a TEXT message that he will be able to read when the phone is switched on, when turn it will be in the range of a network. Set the maximum waiting period the message delivery in the settings of your phone, also turn on the delivery report, if it was not the attitude you have for this number. In this case, you will be notified of the subscriber in the network immediately as will be available for the phone.
In order to know whether the changed phone number of the subscriber public telephone network, use the special directories in your city. Please note that the databases of these directories may have outdated information.
You can find them on the websites and forums of your city, and use a database of phone numbers on the website nomer.org, which provides information about subscribers of urban telephone stations of Russia, Ukraine, Kazakhstan and other CIS countries. A call to that phone number here is irrelevant, because when it is disconnected in most cases hear the same beeps that you normally do when dialing into the free line.
Also learn about the changes of PSTN telephone company, you can on its official website. This sometimes happens if there are any changes in the urban automatic telephone station.