Nowadays, most people have a phone number.
It’s customary to read out each digit separately, but note:
- 0 is commonly said as "oh" /əʊ/ due to its resemblance to the letter O, rather than "zero".
- double digits (fairly common) are often expressed as 11 = “double one", 22 = “double two", etc.
- triple digits (fairly rare) are often expressed, e.g. as 111 = "triple 1" or "treble one", 222 = "triple 2"/"treble 2", etc.
- quadruple digits however tend to be expressed as 1111 = “double one, double one",
There may be a country code as well, with a following 0 in brackets.
Accurately recording phone numbers is an important skill, particularly in some roles, e.g. receptionist. The person receiving the number should repeat the number back to check understanding.