Phone Number


## **Telephone number mapping**
US phone numbers must be either 10 or 11 digits. A 11 digit number must start with a "1". The remaining 10 digits cannot start with a "0" or "1”
### Phone Number Notion
|Title|
|:-:|
|[Telephone number mapping](https://texonom.com/telephone-number-mapping-f0672ef89edd4d8e9639f1b765968929)|




> [Getting a vanity phone number with 4 repeating digits](https://blog.jonlu.ca/posts/verizon-rare-numbers?ref=ls)










