Phone number: international format, caller ID and hiding your number
A phone number is a subscriber's unique address on the network. The international format is made up of the country code (for example, +44 for the UK or +1 for the US), the network or area code and the number itself. Caller ID (CLIP) shows who is calling, while CLIR hides your number from the person you call.
In plain words
A phone number is like a postal address: country, city, street, house. The country code is the "country", then the "operator", then your "house". Caller ID is like the sender's name on an envelope. But scammers can fake the name - so the number on screen is not always genuine.
How it works
- When you call, the network passes your number (CLIP) to the other person.
- If CLIR is on, your number is hidden.
- The international format with + works from any country.
- The number is linked to your SIM via the IMSI in the operator's database.
- You can move your number to another operator (number porting).
Where you'll see it
In call settings, "Show my caller ID" (CLIR). It is best to save contacts in international + format so you can call them from abroad. Caller ID apps flag suspicious numbers.
Does it matter when buying
Save contacts with the + country code - then nothing needs changing when you are roaming. Remember spoofing: scammers can make a "bank" number appear on screen - check by hanging up and calling back on the official number.
Myths
- Myth: If the bank's number is on screen, it is the bank calling. Reality: Numbers can be spoofed.
- Myth: A hidden number can never be identified. Reality: The operator and law enforcement can see the real number.
FAQ
What is a country code?
The international prefix for a country, such as +44 or +1.
How do I hide my number?
Call settings - Show my caller ID - Off (if your operator allows it).
What is spoofing?
Faking the number that shows up when you call.