Can I find which macbook air model I have by serial number? I have a large fleet and do not the device in front of me.

There are several identifiers that could be useful; serial numbers are

among four or five. We're not supposed to post those into open web

discussions; since there is a risk factor. ~ And hosts will remove SN's.

• Lookup Mac Specs - Ultimate Lookup | everymac

https://everymac.com/ultimate-mac-lookup/

EveryMac.com supports these precise identifiers:

• Order Number (Example: MA970B/A, MB467LL/A, or MD093E/A)
• Model Number (Example: A1278 or M8493)
• EMC Number (Example: 2254 or 380B)
• Model Identifier (Example: MacBook5,1)
• Serial Number (Example: W88401231AX or C02CG123DC79)
• Intel processor number (Example: P8600 or 4980HQ)

So This site shows most numbers and build model year identifiers.

A good free downloadable database app helps, has many details.

is MacTracker.

https://mactracker.ca/

These identifiers are specific to detailed use, with OWC upgrade

and replacement parts for Macs; where partial build years differ.

•Upgrades Guaranteed to Work with your Mac | OWC

https://eshop.macsales.com/upgrades/

See Apple's identify pages: MacBook, MacBook Pro and MacBook Air.

Websearch finds: Identify your MacBook model - Apple Support