125 kHz LF
125 kHz LF Proximity Cards & Fobs
Compatible low-frequency proximity cards and key fobs encoded to read identically to the original credential on EM, HID and legacy 125 kHz readers.
Browse 125 kHz LF Proximity Cards & Fobs by brand
All 125 khz lf proximity cards & fobs (51)
Lenel 42-bit (L11601-adjacent)
Compatible with Lenel
- Chip
- T5577 / EM4305
- Format
- 42-bit: parity + 14-bit site + 12-bit card +…
Avigilon 56-bit (Avig56)
Compatible with Avigilon
- Chip
- T5577 / EM4305
- Format
- 56-bit Avigilon Wiegand: facility code + car…
Software House CCOTZ 37-bit (C-CURE/iSTAR)
Compatible with Software House
- Chip
- T5577 / EM4305
- Format
- 37-bit CCOTZ (Software House proprietary) us…
HID ADT 31-bit (ADT31)
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 31-bit: 4-bit facility + 23-bit card number,…
ATS Wiegand 30-bit (ATSW30)
Compatible with ATS
- Chip
- T5577 / EM4305
- Format
- 30-bit: parity + 12-bit site + 16-bit card +…
Visa2000
Compatible with Visa2000
- Chip
- T5577 / EM4305
- Format
- ASK; 64-bit Visa2000 format with checksum (k…
HID H800002 46-bit
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 46-bit HID format (H800002): facility code +…
Cardkey Smartpass 34-bit (SMP34)
Compatible with Cardkey
- Chip
- T5577 / EM4305
- Format
- 34-bit with Issue Level: 14-bit site + 16-bi…
ISCS 38-bit
Compatible with ISCS
- Chip
- T5577 / EM4305
- Format
- 38-bit: leading even parity + 10-bit site co…
Midas 10-bit
Compatible with Midas
- Chip
- T5577
- Format
- 10-bit: 6-bit FC + 4-bit CN, no parity
Idteck (ASK[EM] / PSK[IDC] format)
Compatible with IDTECK
- Chip
- T5577 / EM4305 / EM4100 / 4200
- Format
- 64-bit ASK/Manchester (ASK[EM] family) and P…
DMP 1326 / 7000-series internal prox
Compatible with Digital Monitoring Products
- Chip
- T5577 / EM4305
- Format
- DMP 1326 = standard 26-bit H10301 (HID-compa…
DMP (Digital Monitoring Products)
Compatible with Digital Monitoring Products
- Chip
- T5577 / EM4305
- Format
- DMP 1326 = standard 26-bit H10301 (HID-compa…
Idteck (IPC ASK[EM] / RF10 PSK)
Compatible with IDTECK
- Chip
- T5577 / EM4100 / 4200
- Format
- 64-bit ASK/Manchester (ASK[EM] family) for I…
Chubb 36-bit
Compatible with Chubb
- Chip
- T5577 / EM4305
- Format
- 36-bit: 14-bit site + 16-bit card, no parity
Viking (gate / AES)
Compatible with Viking Electronics
- Chip
- T5577 / EM4305
- Format
- ASK; 64-bit Viking format, 24-bit ID payload…
ATS Wiegand 32-bit (Aritech)
Compatible with ATS
- Chip
- T5577 / EM4305
- Format
- 32-bit: parity + 13-bit site + 17-bit card +…
XceedID RS2 40-bit
Compatible with XceedID
- Chip
- T5577 / EM4305
- Format
- 40-bit: parity + 10-bit site + 28-bit card +…
HID Hewlett-Packard 32-bit (HPP32)
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 32-bit: 12-bit site + 19-bit card, no parity
Bundy TimeClock 40-bit (BC40)
Compatible with Bundy
- Chip
- T5577 / EM4305
- Format
- 40-bit Bundy TimeClock format: facility + ca…
2804 Wiegand 28-bit (2804W)
Compatible with Generic
- Chip
- T5577 / EM4305
- Format
- 28-bit: parity + 8-bit facility + 15-bit car…
HID Check Point 32-bit (HCP32)
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 32-bit: no facility code, 24-bit card number…
Simplex 37-bit (unique)
Compatible with Simplex
- Chip
- T5577 / EM4305
- Format
- 37-bit unique Simplex format (distinct from …
HID Siemens 36-bit (Sie36)
Compatible with HID
- Chip
- T5577 / EM4305
- Format
- 36-bit: parity + 18-bit site + 16-bit card +…
HID Simplex Grinnell S12906b 36-bit
Compatible with HID
- Chip
- T5577 / EM4305
- Format
- 36-bit Simplex Grinnell variant of S12906
Passpoint A14001 34-bit
Compatible with Honeywell Ademco
- Chip
- T5577 / EM4305
- Format
- 34-bit A14001 Wiegand (PassPoint ordering co…
Presco
Compatible with Presco
- Chip
- T5577 / EM4305
- Format
- ASK; Presco format with site code + PIN/ID
PointGuard MDI 37-bit (MDI37)
Compatible with PointGuard
- Chip
- T5577 / EM4305
- Format
- 37-bit: leading even parity + 4-bit site cod…
Paradox (FSK prox)
Compatible with Paradox Security Systems
- Chip
- T5577 / EM4305
- Format
- FSK; data prefix 00001111 (vs HID 00011101);…
30-bit Wiegand (4-bit OEM code)
Compatible with Generic
- Chip
- T5577 / EM4305
- Format
- 30-bit: 4-bit OEM code + facility code + car…
HID H10313M 36-bit
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 36-bit HID H10313M ordering-code variant
RS2 Technologies 33-bit (R901592C)
Compatible with RS2 Technologies
- Chip
- T5577 / EM4305
- Format
- 33-bit R901592C: parity + 2-bit site (FC 0-3…
Schlage/Integrated Access I10001 34-bit
Compatible with Schlage
- Chip
- T5577 / EM4305
- Format
- 34-bit I10001 Wiegand (Schlage/Geoffrey orde…
HID H10320 37-bit BCD (Clock & Data)
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 37-bit BCD: no facility code, 32-bit card (8…
AMAG Symmetry S10401 37-bit
Compatible with AMAG Technology
- Chip
- T5577 / EM4305
- Format
- 37-bit S10401 Wiegand (AMAG Symmetry orderin…
AMAG A10701 32-bit
Compatible with AMAG Technology
- Chip
- T5577 / EM4305
- Format
- 32-bit AMAG A10701 Wiegand: facility code 0-…
CDVI (BTAG 26-bit)
Compatible with CDVI
- Chip
- T5577 / EM4305
- Format
- CDVI proprietary Wiegand 26-bit + custom
EM4450 / EM4550 (read/write 125 kHz memory)
Compatible with EM Microelectronic
- Chip
- T5577 / EM4305
- Format
- Page-organized read/write 1Kbit LF memory
HID Simplex S12906 36-bit
Compatible with HID
- Chip
- T5577 / EM4305
- Format
- 36-bit Simplex: 8-bit site + 24-bit card + i…
HID P10001 Honeywell 40-bit
Compatible with HID
- Chip
- T5577 / EM4305
- Format
- 40-bit P10001: 12-bit site code + 16-bit car…
Destron / Fearing (FDX-A / animal-asset)
Compatible with Destron Fearing
- Chip
- T5577 / EM4305
- Format
- FSK; Destron 96-bit animal/asset format
HID P10004 37-bit PCSC
Compatible with HID
- Chip
- T5577 / EM4305
- Format
- 37-bit P10004 (PCSC ordering code): leading …
HID Prox 37-bit H10302 (no facility code)
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 37-bit H10302: leading even parity + 35-bit …
NexWatch / NexKey / Quadrakey (Honeywell Northern)
Compatible with NexWatch
- Chip
- T5577 / EM4305
- Format
- PSK; 8-bit preamble (01010110) + 32-bit rese…
Honeywell/Northern N10002 34-bit
Compatible with Honeywell
- Chip
- T5577 / EM4305
- Format
- 34-bit N10002: 8-bit site/facility code + 16…
NexWatch / NexKey / Quadrakey (Honeywell Northern, 32-bit)
Compatible with Honeywell
- Chip
- T5577 / EM4305
- Format
- PSK; 8-bit preamble + 32-bit reserved + 32-b…
36-bit 18-site generic (32-B)
Compatible with Generic
- Chip
- T5577 / EM4305
- Format
- 36-bit: parity + 18-bit site + 16-bit card +…
HID 34-bit H10306
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 34-bit H10306: leading even parity + 16-bit …
EM410x / EM4100 / EM4102 (read-only 125 kHz ID)
Compatible with EM Microelectronic
- Chip
- T5577 / EM4305
- Format
- 40-bit (64-bit Manchester) read-only ID, ASK…
HID Prox 26-bit H10301 (standard Wiegand)
Compatible with HID Global
- Chip
- T5577 / EM4305
- Format
- 26-bit H10301: leading even parity + 8-bit f…
EM4200 (read-only 125 kHz ID, EM4100 successor)
Compatible with EM Microelectronic
- Chip
- T5577 / EM4305
- Format
- 64-bit / 128-bit EM read-only ID, ASK/Manche…
Frequently asked questions
What is in the 125 kHz LF Proximity Cards & Fobs category?
Compatible low-frequency proximity cards and key fobs encoded to read identically to the original credential on EM, HID and legacy 125 kHz readers. We list 51 compatible formats here, all engineered by specification to read on your existing readers, not generic look-alikes.
Are these genuine or compatible credentials?
Every credential is an independently manufactured compatible product, not an OEM-branded one. Security ID Systems is independent and not affiliated with any referenced manufacturer. Our credentials are encoded to present the identical data your readers already accept.
Can you supply formats not listed on the site?
Yes. The catalogue documents 369 compatible formats, but we regularly encode credentials for specialist or undocumented formats too. Send the part number printed on your card or a photo of the reader and we confirm compatibility before you order.
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Send the part number printed on your card or a photo of the reader. We confirm compatibility before you order — and we cover the specialist formats nobody else lists.