digplanet beta 1: Athena
Share digplanet:


Applied sciences






















Electronic serial numbers (ESNs) were created by the U.S. Federal Communications Commission (FCC) to uniquely identify mobile devices, from the days of AMPS in the United States starting in the early 1980s. The administrative role was taken over by the Telecommunications Industry Association in 1997 and is still maintained by them. ESNs are currently mainly used with CDMA phones (and were previously used by AMPS and TDMA phones), compared to International Mobile Equipment Identity (IMEI) numbers used by all GSM phones.[1]

The first 8 bits of the ESN was originally the manufacturer code, leaving 24 bits for the manufacturer to assign up to 16,777,215 codes to mobiles. To allow more than 256 manufacturers to be identified the manufacturer code was extended to 14 bits, leaving 18 bits for the manufacturer to assign up to 262,144 codes. Manufacturer code 0x80 is reserved from assignment and is used instead as an 8-bit prefix for pseudo-ESNs (pESN). The remaining 24 bits are the least significant bits of the SHA-1 hash of a mobile equipment identifier (MEID). Pseudo-ESNs are not guaranteed to be unique (the MEID is the unique identifier if the phone has a pseudo-ESN).

ESNs are often represented as either 11-digit decimal numbers or 8 digit hexadecimal numbers. For the decimal format the first three digits are the decimal representation of the first 8 bits (between 000 and 255 inclusive) and the next 8 digits are derived from the remaining 24 bits and will be between 00000000 and 16777215 inclusive. The decimal format of pseudo ESNs will therefore begin with 128. The decimal format separately displays 8 bit manufacturer codes in the first 3 digits, but 14 bit codes are not displayed as separate digits. The hexadecimal format displays an ESN as 8 digits and also does not separately display 14 bit manufacturer codes which occupy 3.5 hexadecimal digits.

As ESNs have essentially run out, a new serial number format, MEID, was created by 3GPP2 and was first implemented by Verizon in 2006. MEIDs are 56 bits long, the same length as the IMEI and, in fact, MEID was created to be a superset of IMEI. The main difference between MEID and IMEI is that the MEID allows hexadecimal digits while IMEI allows only decimal digits – "IMEI shall consist of decimal digits (0 through 9) only".[2]

The last of the previously unused ESN codes were allocated in November 2008.[3] Applications for assignments were accepted until June 30, 2010 using reclaimed ESN codes, those previously assigned to AMPS or TDMA phones and therefore not present on CDMA2000 systems. Reclaimed codes have also been used for UIMID assignments. Codes are assigned according to industry guidelines.[4]

Although ESN assignments may still occur in the future based on applications received before June 30, 2010, there have not been any assignments made since December 31, 2010.


External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Electronic_serial_number — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
81385 videos foundNext > 

X-10 Operations: Using the Electronic Serial Number to Set the Operating Mode and Combination

Product page: http://www.kaba-mas.com/kaba-brand/products/553040/x-10.html If you have lost or forgotten the current combination, and the back cover is ...

What is a BAD ESN? What is an ESN? Where is the ESN?

In this video, we explain everything and anything you need to know about an ESN number. We provide you with the different types of serial numbers including ...

software program system usaha electronic handphone serial number

software program system usaha electronic handphone serial number call us (0877) 52655595 - (081) 259444676 http://www.mesinkasir.us ...

Altium Designer 14 Mac/Win [Free Download] Crack and Serial number

The new Altium Designer extends the company's leadership position in native 3D PCB Design systems by delivering a new customer centric platform ...

Vintage Computer MITS Altair 8800 Microcomputer One of the first SN21

Vintage Computer MITS Altair 8800 was one of the very first assembled units sold by Ed Roberts. Dean Gross placed an order for this computer December 17 ...

Need For Speed Shift 2 Hack Serial Number

Cea mai simpla metoda de instalat jocuri de la EA Sports, merge la orice Joc cu acest model de instalare.

Mental Resonance - 31​.​0 (Joton Remix)

Mental Resonance - Zer Thirty One Label : Serial Number 849 Records / SN849R031 Released : Otober 2014 Genre : Electronic Style : Techno ...

Tutorial 06 for Arduino: Serial Communication and Processing

Serial.flush() has changed in Arduino 1.0. You can use this instead: while(Serial.available()[GREATER-THAN]0) { Serial.read(); } You can download the parts list ...

NYPD Crime Prevention Tip: Register Portable Electronics with NYPD Operation ID

Operation ID is offered free of charge by the New York City Police Department and involves registering the serial number of valuable portable electronics along ...

Mental Resonance - 31.1 (Original Mix)

Mental Rsonance - Zer Thirty One Label : Serial Number 849 Records / SN849R031 Released : Otober 2014 Genre : Electronic Style : Techno ...

81385 videos foundNext > 

172 news items

Arizona Daily Star
Mon, 14 Sep 2015 19:10:39 -0700

With each phone having both a unique number and electronic serial number, the tower — or the police equipment — can see everyone who is nearby. Tucson police have said they use it to track specific suspects by their phones, ignoring other numbers ...
Press Release Rocket
Thu, 01 Oct 2015 08:00:00 -0700

The invention utilizes the Electronic Serial Number (ESN) and/or the Mobile Identification Number (MIN) to securely transmit a code to a receiver, which reads the code and initiates an automated process. This ensures only known, authorized devices can ...

Lid Time - Weird News, Entertainment, News Headlines (blog)

Lid Time - Weird News, Entertainment, News Headlines (blog)
Thu, 24 Sep 2015 07:37:30 -0700

Look at the back of your iPhone 6 to locate the phone's electronic serial number, also known as the IMEI (international mobile equipment station identity). The iPhone 6S and 6S Plus incorporate 3D Touch, which recognizes different levels of pressure on ...

9 to 5 Mac (blog)

9 to 5 Mac (blog)
Tue, 25 Aug 2015 11:12:19 -0700

The status of an iPhone can be checked using a device-specific serial number that's called an IMEI (International Mobile Equipment Identity) number, ESN (Electronic Serial Number), or MEID (Mobile Equipment Identifier). IMEIs have traditionally been ...

Yahoo Tech

Yahoo Tech
Thu, 06 Aug 2015 04:31:00 -0700

But there's another way to tell that's more certain: When you look on the back of an iPhone 6, you'll see the phone's electronic serial number — known as the IMEI (international mobile equipment station identity) — engraved in tiny print just under ...

BBC News

BBC News
Thu, 03 Sep 2015 16:03:45 -0700

The US justice department says federal agencies will have to obtain search warrants to use technology that tracks mobile phones under new guidance. Until now agencies such as the FBI had not needed a warrant to use machines called cell-site simulators ...

BBC News

BBC News
Wed, 10 Jun 2015 05:56:15 -0700

By mimicking a legitimate mobile tower and tricking every phone in range into connecting to them, the boxes "catch" the international mobile subscriber number (IMSI) and electronic serial number (ESN) of each and reveal the exact location of its user ...

Police News

Police News
Thu, 03 Sep 2015 13:37:15 -0700

Verizon Wireless and Sprint use CDMA-compatible technology, and identify their phones with Mobile Equipment Identifier (MEID) or Electronic Serial Number (ESN) numbers. These identifiers let the carrier blacklist a stolen cellphone after a consumer ...

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight