Network query

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Under network query refers to the technical possibility to determine by a subscriber from to where phone network of their own or another terminal (phone number) is located.

Query from the landline

The network operator / provider used can be queried in the public German landline networks (announcement service):

If you dial the operator code and then 0311, you can find out whether this operator can also make local calls via call-by-call . If this is possible, you will hear an announcement according to the pattern " You are making your local calls over the network from ..." , if this is not possible, you may hear the busy signal or the express message "The network operator you have selected offers currently does not offer the service you want in your region " .

In addition to the two above-mentioned numbers, Vodafone also has a free inquiry hotline for all landline and mobile phone customers: dialing 0800 5052090 + entering the phone number takes you to the Vodafone announcement service (see internal speed dial 12313 below), which is available from all German mobile phone networks and in particular, is generally accessible free of charge regardless of the respective provider and the respective tariff.

Speed ​​dials in the cellular network

The network of another mobile phone subscriber can be queried in the German mobile phone networks :

  • Deutsche Telekom : Speed ​​dial 4387 + entry of the phone number (announcement service)
  • Vodafone D2 : Speed ​​dial 12313 + entry of the phone number (announcement service)
  • E-Plus : Speed ​​dial 10667 + entry of the phone number (announcement service)
  • O₂ Germany : SMS with the content NETZ [phone number] to abbreviated dialing 4636 (response will be as SMS)

Internet query

For Android - and Apple's iOS - smartphones various applications are available, which query the destination numbers using the online connection of the phone.

In addition, there are several commercial online services with which a certain limited number of queries per day and user are free.