1. Get DELL Service Tag on remote Windows system
Login to the Windows remote-host using VNC or remote desktop connection. Use WMIC on Windows to get service tag as shown below.
C:>wmic bios get serialnumber SerialNumber ABCDEF1
Following WMIC command will give make and model number along with service tag.
C:>wmic csproduct get vendor,name,identifyingnumber IdentifyingNumber Name Vendor ABCDEF1 PowerEdge 2950 Dell Inc.
If VNC or remote desktop connection to the remote-host is not available, execute the following from the local-host to get the service tag of the remote-host.
C:>wmic /user:administrator /node:remote-host bios get serialnumber SerialNumber ABCDEF1 [Note: Replace remote-host with the machine name of your remote-host.]
2. Get DELL Service Tag on remote Linux system
Login to the Linux remote-host using SSH. Use dmidecode on Linux to get service tag as shown below.
[remote-host]# dmidecode -s system-serial-number ABCDEF1
3. Get DELL Express Service Code From Service Tag
Service Tag is a base-36 integer. Once you have the Service Tag, you can calculate express service code yourself. Express Service Code is base-10 decimal integer of Service Tag. Dell uses express service code mainly for their support call-routing. When you call dell support, their automated call-routing system may ask you to enter express service code, which you can easily enter in your telephone, as it is just a bunch of numbers, instead of characters.
Use the following online tools to find express service code from service tag and vice-versa.