> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten.md).

# Manage phone numbers

- [How do I book phone numbers?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-buche-ich-rufnummern.md): Guide to booking German local, mobile and international phone numbers with sipgate, including test numbers and verification.
- [How do I assign the phone numbers?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-weise-ich-die-rufnummern-zu.md): Learn how to assign, change or remove phone numbers in sipgate for users, groups or VoIP connections.
- [How do I assign an extension?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-weise-ich-eine-durchwahl-zu.md): This is how you assign internal extensions to users and groups in sipgate for speed dial, presence display and busy lamp field.
- [How can I extend a local number?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-kann-ich-eine-ortsrufnummer-verlaengern.md): Learn how to extend a German local number by one digit in sipgate as an admin and thus expand your existing number block.
- [How can I cancel a phone number?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-kann-ich-eine-rufnummer-kuendigen.md): Step-by-step guide to canceling phone numbers in the sipgate account management, including the option to revoke.
- [How can I take my phone numbers to other providers?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-kann-ich-meine-rufnummern-zu-anderen-anbietern-mitnehmen.md): This is how you port landline and mobile numbers from sipgate to another provider – free of charge and uncomplicated.
- [How do I add phone numbers to the Telekom phone book?](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-trage-ich-die-rufnummern-ins-telefonbuch-der-telekom-ein.md): Guide to adding your sipgate phone numbers and fax numbers to the public Telekom phone directory via location management.


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