German Phone Number Classifier

Library for checking in which category a german phone number falls in regards to Bundesnetzagentur classes.

This gem is developed for ruby versions '>= 2.7.0'.

Add the gem to your Gemfile:

gem 'german_phone_number_classifier', '1.0.0.pre'

and run bundle install.

The module comes with 2 class methods as public interface.

This method is for identifying the a telephone number as part of the german phone number system and will put it in a category identified as symbol:

irb(main):001:0> GermanPhoneNumberClassifier.classify('+4930120849110')
=> :landline
irb(main):002:0> GermanPhoneNumberClassifier.classify('+4830120849110')
=> :non_german_phone_number
irb(main):003:0> GermanPhoneNumberClassifier.classify('+4915012345678')
=> :mobile

Following categories are defined:

• :no_phone_number
• :non_german_phone_number
• :authoritative see here, here, here and here
• :provider_selection
• :high_connection
• :service_hotline
• :vpn see here and here
• :online_and_traffic see here and here
• :personal_number
• :free_service_hotline
• :dialer
• :mobile
• :premium_service_hotline
• :test_provider
• :landline
• :unknown_class

Furthermore the gem offers a utility function to get the location from prefix mappings for german phone numbers which are :landline. All others numbers will get nil returned.

irb(main):002:0> GermanPhoneNumberClassifier.landline_location('+4930120849110')
=> "Berlin"

Test can be run with rspec: bundle exec rspec and rubocop: bundle exec rubocop

1. Fork it (https://github.com/jethroo/german_phone_number_classifier/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Notes:

• Contributions without tests won't be accepted.
• Please don't update the gem version.

see here

• Homeday
• Carsten Wirth