A prox card (short for proximity card) is used for access control. It allows authorized individuals to gain entry to secured areas — such as office buildings, data centers, or parking garages — without physically inserting the card into a reader. Instead, the card uses radio frequency identification (RFID) technology to communicate wirelessly with a reader when held close (typically within a few inches).
Common Uses of Prox Cards:
- Building Access – Unlock doors to offices, labs, or secure facilities.
- Employee Identification – Often combined with photo ID badges.
- Time and Attendance – Clocking in/out of work shifts.
- Parking Access – Entering gated lots or garages.
- Elevator Control – A prox card is also used for limiting floor access in buildings.
- Event or Membership Access – Gaining entry to gyms, clubs, or conferences.
Prox cards are valued for their convenience, durability, and security (though more secure technologies like smart cards or mobile credentials are increasingly replacing them in high-security environments).
- What is a proximity card reader?
Proximity card readers play a crucial role in an access control system. These devices operate without physical contact, reading the credentials of a token or proximity card when it is within the specified detection range.