Casi-Rusco C10106 (40-bit Proximity) Compatible Cards & Fobs
Casi-Rusco C10106 is a proprietary 40-bit Wiegand proximity format at 125 kHz carried through the Casi-Rusco to GE Security to UTC to Interlogix lineage, with a large legacy installed base and very few aftermarket suppliers.
Does American Key Cards make Casi-Rusco C10106 (40-bit Proximity) compatible cards?
Yes — American Key Cards supplies non-OEM Casi-Rusco C10106 (40-bit Proximity) compatible cards and key fobs (AKC Casi-Rusco C10106-Compatible 40-Bit Card), encoded to your facility code and card-number range and ready to use on your existing Casi-Rusco / GE (UTC Interlogix) readers. No hardware changes, no OEM dealer minimums, at a fraction of OEM pricing.
- 125 kHz
- Frequency
- RFID prox (standard Wiegand)
- Technology
- 1
- Bit format
- 3+
- OEM part nos.
- Yes
- Cloneable
The C10106 40-bit format (the 'Casi 40-bit' / GE Entree credential) is the proprietary proximity standard native to Casi-Rusco ProxLite access control, which passed through GE Security, UTC Fire & Security, and Interlogix ownership while keeping the same 125 kHz credential. Because the product line was eventually discontinued, the substantial legacy installed base is poorly served by mainstream card suppliers. Our compatible 40-bit cards and fobs are programmed to your facility code and card-number range, providing accessible drop-in replacements without OEM-channel restrictions.
Casi-Rusco C10106 (40-bit Proximity) specifications
- Brand / OEM
- Casi-Rusco (later GE Security / UTC Fire & Security / Interlogix)
- Technology
- Passive RFID proximity (standard Wiegand)
- Frequency
- 125 kHz
- Chip
- Standard 125 kHz proximity IC programmed in the C10106 40-bit Wiegand structure (cloneable to T5577)
- Bit formats
- C10106 40-bit Wiegand (Casi-Rusco / GE Entree 'Casi 40-bit' format; facility code begins with 15, card number 0-457,681)
- OEM part numbers
- CXCRD, CXISO, CXKEY
Specifications reviewed June 2026
Our compatible Casi-Rusco C10106 (40-bit Proximity) credentials
American Key Cards manufactures non-OEM credentials engineered to work with your existing Casi-Rusco / GE (UTC Interlogix) readers — no hardware changes, encoded to your facility code and card-number range.
Full specifications, form factors and ordering FAQ: Specialty & legacy prox credentials
Can Casi-Rusco C10106 (40-bit Proximity) cards be cloned?
Yes — Casi-Rusco C10106 (40-bit Proximity) is an open format that can be reproduced from its facility code and card number. We don't copy individual cards on request, though — we manufacture new, correctly-encoded credentials for the systems you own or manage.
C10106 is a 40-bit Wiegand structure carried on an unencrypted 125 kHz proximity IC — it can be read and copied with commonly available tools such as Proxmark3 and rewritable T5577 cards. The longer 40-bit length increases the addressable code space but provides no cryptographic protection. Facilities needing clone resistance should migrate to a 13.56 MHz smart card platform (e.g., MIFARE DESFire).
Where Casi-Rusco C10106 (40-bit Proximity) is used
- Legacy Casi-Rusco ProxLite installations still in active service
- GE Security / GE Entree access control deployments on the C10106 format
- UTC Fire & Security and Interlogix sites maintaining original 40-bit readers
- Badge replacement programs for buildings that have not migrated off the Casi-Rusco platform
Compatible readers
Related formats
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View compatible cardsAWID 37-Bit
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.
View compatible cardsIndala FlexPass 26-Bit
Indala FlexPass 26-bit is a 125 kHz proximity card format using PSK modulation — architecturally distinct from HID Prox — with Wiegand output supporting 255 facility codes and up to 65,535 card numbers per site.
View compatible cardsCasi-Rusco C10106 (40-bit Proximity) — FAQ
What is the Casi-Rusco C10106 40-bit format?
C10106 is the proprietary 40-bit Wiegand proximity format native to Casi-Rusco access control, often referred to as the 'Casi 40-bit' format or associated with GE Entree. Its facility-code range conventionally begins with 15, with a card-number range up to roughly 457,681. It runs at 125 kHz and is read by Casi-Rusco ProxLite readers and their GE / UTC / Interlogix successors.
Why is Casi-Rusco hardware referenced as GE, UTC, and Interlogix?
Casi-Rusco was acquired by GE Security, which became part of UTC Fire & Security and was later spun out under the Interlogix brand. The same 40-bit C10106 credential standard carried through all of those owners, so legacy installations may be labeled Casi-Rusco, GE Security, GE Entree, UTC, or Interlogix while using the identical card format.
Can Casi-Rusco C10106 cards be cloned?
Yes — C10106 is an unencrypted 125 kHz proximity format, so it can be read and duplicated with tools such as Proxmark3 and rewritable T5577 cards, like any low-frequency proximity credential. The 40-bit length adds code space but not security. For clone-resistant credentials, the system would need to be upgraded to a 13.56 MHz smart card platform such as MIFARE DESFire.