Right-click the adapter, choose , and select the Details tab. Under the Property dropdown, choose Hardware Ids .
The is not a specific brand of wireless card, but rather a regulatory certification number issued by Anatel (Agência Nacional de Telecomunicações), Brazil's national telecommunications agency . This label is frequently found on wireless modules from major manufacturers like Atheros (Qualcomm) or Intel , which are installed in laptops from brands such as Dell , Lenovo , Acer , and Asus .
: Many older laptops feature a physical toggle switch on the side or an Fn key combination (like Fn + F2 or Fn + F12 ) to turn the wireless antenna on and off.
If you saw “2504 09 3987” in an error message like:
2504093987 does not match any FCC ID in the public database. However, some manufacturers encode date codes into serials. For instance, 2504 = 25th week of 2004, or week 25 of 2024, but that is speculative.
Finally, if you entered this search term because your Wi-Fi stopped working after a Windows Update or Linux kernel update, simply use the built-in driver rollback or the latest generic driver from your adapter’s chipset vendor. The number “2504 09 3987” will not help or hinder that process – it is a red herring.