Have you ever wondered whats hidden behind the long 20 digit number printed behind every SIM card you purchase ?
Its the unique SIM identifier, which holds the Network , Country, MCC-MNC details of the SIM.
The maximum length of the visible card number is 20 characters; 19 digits are preferred, but telecommunication network operators who are already issuing Phase 1 SIM cards with an identification number length of 20 digits may retain this length.
The number is composed of the following subparts:
Issuer Identification number (max. 7 digits)
- Major Industry Identifier (MII), 2 digits, 89 for telecommunication purposes.
- country code, 1-3 digits, as defined by ITU-T recommendation E.164.
- issuer identifier, variable.
Individual account identification
- individual account identification number.
- parity check digit.
Yes.. that narrows down the issue a bit. But how do you decode the code behind it , to plain English ?
www.numberingplans.com
Go to the Page, And from your left side , select "Number Analysis Tools" and Select SIM number, Or you can visit this link.
Enter the 20 Digit number printed on the back of your SIM card , and Hit the Analyse Button.
You will see the Information stored in your SIM number.
Here's an Analysis Report I got from a Sri Lankan Mobitel SIM number.
