AWID 37-Bit Compatible Cards & Fobs
AWID 37-bit uses the H10302 structure — a 35-bit globally unique card number with no facility code — delivered via AWID's proprietary 125 kHz air interface to AWID-compatible readers.
The AWID 37-bit format implements the H10302 Wiegand protocol, assigning each card a unique 35-bit serial number (supporting over 34 billion unique values) with no facility code field, transmitted via AWID's proprietary 125 kHz air interface to AWID series readers. This format is chosen for large or multi-site AWID deployments where globally unique card identifiers simplify credential management and eliminate the facility-code coordination burden inherent to 26-bit systems.
AWID 37-Bit specifications
- Brand / OEM
- AWID / HID Global
- Technology
- 125 kHz Passive Proximity (37-bit Wiegand, AWID proprietary air-interface encoding)
- Frequency
- 125 kHz
- Chip
- AWID proprietary 125 kHz RFID coil; same low-frequency passive transponder platform as AWID 26-bit with extended bit-count programming
- Bit formats
- 37-bit Wiegand (H10302-compatible) — 35-bit unique card number (0–34,359,738,367), 1 even parity bit, 1 odd parity bit; no facility code field
- OEM part numbers
- AWID 37-bit card (ordered with 37-bit format specification), AWID 37-bit key fob
Our compatible AWID 37-Bit credentials
American Key Cards manufactures non-OEM credentials engineered to work with your existing AWID readers — no hardware changes, encoded to your facility code and card-number range.
Can AWID 37-Bit cards be copied?
AWID 37-Bit is an open format, so a compatible card can be produced from your facility code and card number. We don't copy individual cards on request — we manufacture new, correctly-encoded credentials for systems you own or manage.
The H10302 37-bit format eliminates the facility code, assigning each card a unique 35-bit serial number that is never duplicated in production — analogous to a currency serial number. While this eliminates inter-site duplication risk, the card data is unencrypted and can be reproduced from the card number. Requires AWID-compatible readers configured for 37-bit output.
Where AWID 37-Bit is used
- Larger AWID installations requiring more than 65,535 unique card numbers
- Enterprise and multi-site deployments using AWID readers where unique global card IDs eliminate site-code management
- AWID-based parking, gated community, or commercial systems upgraded to 37-bit format
Compatible readers
Related formats
You might also need
AWID 26-Bit
AWID 26-bit is a 125 kHz proximity format outputting standard Wiegand 26-bit data (facility code 1–255, card number 1–65,535) via the AWID proprietary air interface, widely used in legacy commercial and residential access control systems.
View compatible cardsHID Prox H10301 (Standard 26-Bit)
The HID H10301 26-bit format is the most widely deployed proximity card format in North America, used on millions of doors across commercial and residential buildings.
View compatible cardsAWID 37-Bit — FAQ
What is the main advantage of AWID 37-bit over AWID 26-bit?
The 37-bit H10302 format removes the facility code entirely, replacing it with a 35-bit unique card serial number (up to 34 billion unique values). This means every card is globally unique — no two cards will ever share the same number, eliminating the card-number collision risk that exists in 26-bit systems with the same facility code across multiple sites.
Is AWID 37-bit the same as HID 37-bit H10302?
The bit format structure (H10302) is the same — 35-bit card number with leading even and trailing odd parity bits. However, the card-to-reader air interface is AWID proprietary, not HID Prox. You must use AWID-compatible readers; the data delivered to the access panel matches the standard H10302 Wiegand specification.
Do I need a facility code to order AWID 37-bit cards?
No. The H10302 37-bit format has no facility code field — only a unique card number. You simply specify the card number range you want programmed, and each card gets a globally unique identifier.