For landlines this is followed by a five-digit area code starting with 2 and ending with 0; and then a five-digit number.
The cards can be used to make calls on landlines (pay phones or home phones) or on cell phones.
While you will be able to find the full information on most landlines, this is not the case with mobile phones.
This has become an increasingly prevalent concern as more and more people abandon their landlines in favor of using mobile phones as their primary phones.
As you may already know, every time that you make an outgoing call from your cell phone, that number is displayed on both landlines and cellular phones if the recipient of the call has that feature enabled.