I found this on another thread posted by 'SankuNiku:
"The NVC uses DHL to ship their packages. Once you confirm the date that the I-130 was sent, you can go on the DHL website to approximately track your case. There are forums here talking about it but I'll sum it up below.
1. Go to: http://track.dhl-usa.com/TrackByRef.asp?nav=TrackByRef
2. In Reference, enter the info as follows:
EXP DD MMM YYYYA
EXP is constant
DD is the date before the day the NVC said they shipped the case.
MMM is the three letters representing the month the NVC shipped the case
YYYY is the year the NVC shipped the case
A is constant
For example, if the NVC says they shipped the case on February 12 2009, this would be entered as "EXP 11 FEB 2009A"
3. Date range for shipment - From: Enter the date of the day NVC said they sent the case
4. Date range for shipment - To: Enter todays date
5. Keep the rest of the fields blank
7. Once you enter the info, press "Track"
8. After a while you will see a list of all of the packages that left the NVC today. You need to search for the specific consulate, in your case Lima?
9. When you find the shipment the corresponds to your consulate, you will see the tracking number that you can record.
10. You can then track the shipment from the NVC to your specific Consulate"
Hope it helps.