Q: Is it anonimous and secure to report a harassing number?
Reporting a harassing number is anonymous, confidential and secure. Use a nickname if you wish. It creates awareness of possible scam, harassing or annoying robo-callers.
Q: What is E.164 phone numbering format?
E.164 number uniquely identifies a public network termination point and typically consists of three fields, CC (country code), NDC (national destination code), and SN (subscriber number), up to 15 digits in total.
For example a phone number in USA, California will look like this +14155544000, a number in UK, London will look like +442079834000 and a number in Berlin, Germany can look like this +493090260 etc.