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Amadeus DNC Command: Car Rental Code Encode/Decode

A complete guide to the DNC command in Amadeus — how to encode and decode car rental company codes and identify the correct company for a booking.

Car rental companies in the GDS are identified by two-letter codes, not by their full brand names. When you need to add a car rental segment to a PNR, the system expects the code for the company — not the name the customer said. The DNC command is the Amadeus entry that handles this. It allows you to find the two-letter car rental company code from its name, or identify the company from its code. This guide explains what DNC does, the syntax for each variation, and when it should be used.

What Does the DNC Command Do?

DNC is the Amadeus GDS command used to encode and decode car rental company codes.

Category: Encoding & Decoding.

It allows you to find the two-letter car rental company code from its name or identify the company from its code. Car rental company codes consist of two characters, and DNC is the correct entry whenever you need to identify one of them.

Encode a Car Rental Name into its Two-Letter Code

Display the two-letter code for National Car Rental:

DNCNATIONAL

This displays the two-letter code for National Car Rental. Use it when you know the company name but not the code — the system returns the code you need for the car rental segment.

Decode a Two-Letter Car Rental Code into its Name

Display the car rental company name for the code ZI:

DNCZI

This displays the car rental company name for the code ZI. Use it when you have a two-letter code from a ticket, a document, or a colleague’s note and need to confirm which rental company it refers to.

Important Notes

Use DNC when you need to identify a car rental company or its code.
Car rental company codes consist of two characters.
DNC is part of the Amadeus encoding and decoding toolkit — the same command family used for airlines, hotels, cities, and equipment.

When to Use DNC

Use DNC during the encoding and decoding step whenever you need to find or identify a car rental company code. Typical scenarios include:

Booking a car rental when you know the company name but not the code.
Decoding a two-letter car rental code from a ticket, confirmation, or supplier document.
Confirming the correct brand within a car rental group that operates under several names.
Matching a customer’s request to a specific car rental company code before booking.
Verifying a code provided by another agent or office before adding it to a PNR.
Adding a car rental auxiliary segment to a PNR with the correct code using CU.
Confirming the code after a car rental company rebrands or is acquired by another group.

How DNC Fits Into Your PNR Management Workflow

A typical session using DNC might look like this:

Retrieve the PNR with RT or begin a new booking.
When a car rental name or code is needed, enter the DNC entry — for example DNCNATIONAL or DNCZI.
Note the code or name and continue with the car rental booking.
Add the car rental to the PNR as an auxiliary segment with CU.
Add any relevant remarks with RM if further detail is required.
Verify the itinerary with RTIM to confirm the car rental segment appears correctly.
Save the PNR with ER or ET.

How DNC Relates to Other Encoding and Decoding Commands

DNC → encodes and decodes car rental company codes.
DNH → encodes and decodes hotel company codes and displays master chain hotels.
DAN → encodes and decodes airline names and codes.
DNA → related airline name decoding command.
DNE → encodes and decodes equipment (aircraft) codes.
DNS → related state or reference data decoding command.
DAC → related airline or reference decoding command.
CU → creates a car rental auxiliary segment in the PNR.

The distinction matters: DNC handles car rental company codes specifically, while DNH handles hotels, DAN and DNA handle airlines, DNE handles aircraft equipment codes, and DNS and DAC handle other reference data. Use DNC whenever the question is about a car rental company.

Important: DNC returns the car rental company code or name only — it does not confirm availability, rates, or vehicle categories at a specific location. For actual car rental availability and booking, use the car rental availability and booking commands within the GDS.

Car rental companies rebrand and merge over time. Always verify the code with DNC before entering it into the PNR, especially for companies that have recently changed name or been acquired by a larger group.

Frequently Asked Questions

What does the DNC command do in Amadeus?

DNC encodes and decodes car rental company codes — it finds the two-letter code from a company name, or the name from a code.

What does DNCNATIONAL mean?

It displays the two-letter car rental company code for National Car Rental.

What does DNCZI mean?

It displays the car rental company name for the code ZI.

How long is a car rental company code?

Car rental company codes consist of two characters.

How is DNC different from DNH or DAN?

DNH handles hotel codes, DAN handles airline names and codes, and DNC handles car rental company codes.

Does DNC check car rental availability?

No. DNC only provides the code or name. For availability and booking, use the car rental booking workflow, then add the segment to the PNR with CU.

Conclusion

The DNC command is the car rental encoding and decoding tool in Amadeus. Use DNCNATIONAL to find the two-letter code for a car rental company, and DNCZI to decode a code into its name. It removes the need for external reference lists, keeps your car rental bookings accurate, and is essential when a customer asks for a company you do not recognise or when a code appears in a document without explanation. Remember that DNC only handles codes — availability and booking are separate steps handled within the car rental booking workflow and added to the PNR with CU. Paired with the other encoding and decoding commands — DNH for hotels, DAN and DNA for airlines, DNE for equipment, and DNS and DAC for other reference data — DNC completes your reference data toolkit and keeps every booking accurate from first entry to final ticket.