There are several ways to locate your iPad’s serial number, UDID, IMEI and CDN. You can even get most of the numbers without the iPad as long as you have access to a computer that was used to back it up.
If you have the iPad handy, the serial and IMEI (IMEI is only on 3G models) are engraved right on the back of the iPad.
If you still have the original box that your iPad came in, you can get your iPad’s serial number and IMEI number on the barcode label that is affixed to the box.
You can also find your serial number on your iPad’s screen by going to Settings-> General-> About.
If you have a 3G model you will also find the Cellular Data Address, IMEI, ICCID and Modem Firmware.
iTunes makes it easy to find your iPad’s serial number and identifier. Once you locate these important numbers, you can copy and paste them into any document, email or webpage.
Note: If you have a 3G model, you can find the CDN, IMEI and ICCID by continuing to click where the serial number was originally displayed.
If you have access to a computer that has backed up your iPad in iTunes, then you can get the serial number without it being connected.
Apple provides so many ways for you to find your serial numbers, you can almost always locate it.