Hex format to decimal format example: 0x0106C01B8 breaks into 0x10 and 0圆C01B8. Make sure the blocks start and end with the correct number of hex characters/decimal digits. To convert between the two, break up your code (in either format) into a manufacturer block and a serial number block, convert the block to/from decimal/hex separately, then concatenate the two blocks. You might have as few as 8 digits (a manufacturer code of 000 ), or 9 digits (reserved manufacturer codes 001 through 009 ). Microsoft Excel) strip off leading 0's, making it difficult to tell whether you're looking at a decimal ESN. This is the second most widely used format.īeware: some programs (e.g. Examples: 0x0106C01B8 (using 0x to indicate that a hex value follows), 0hC3B80 (using 0h to indicate that a hex value follows), e5ab0134b (without a prefix).ġ1 digit decimal code : A 3 digit decimal number to represent the manufacturer, and an 8 digit decimal number to represent the serial number. The 32 binary bits can be expressed in several ways, but the two recognized ways are:Ĩ character hex code: A 2 character hexadecimal code to represent the manufacturer, and a 6 character hex code to represent the serial number. It's usually most convenient to assume the standard format, and treat the reserved codes as exceptions. Some codes are reserved, however: numbers 0 through 18, 128, 250, and 255 are not to be used as normal ESNs.įor manufacturer codes 0 through 17, 250, and 255, the manufacturer code is 14 bits and the serial number is 18 bits.Ĭode 128 is discussed below in the pESN section. The 8 bits of the manufacturer portion lead to 256 (2^8) different possible manufacturer codes.

The basic format for ESNs consists of 8 bits to specify the manufacturer and 24 bits to specify the serial number: They are 32 bits long (that is, they can be described by a sequence of 32 1's and 0's), and identify the manufacturer of a mobile device and also the serial number assigned to the device by that manufacturer. ESNs are managed by the Telecom Industry Association.

Meid to imei converter