Casi-Rusco C10106 (40-bit Proximity) Compatible Cards & Fobs
The format that outlived four corporate owners: Casi-Rusco's 40-bit C10106 layout still runs in government, campus, and enterprise buildings whose readers have said Casi-Rusco, GE, UTC, and Interlogix on successive purchase orders.
Does American Key Cards make Casi-Rusco C10106 (40-bit Proximity) compatible cards?
Yes — American Key Cards supplies unbranded Casi-Rusco C10106 (40-bit Proximity) compatible cards and key fobs (AKC 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 and no dealer account required.
- 125 kHz
- Frequency
- RFID prox (standard Wiegand)
- Technology
- 1
- Bit format
- 3+
- OEM part nos.
- American Key Cards
- Order from
C10106 is a study in how long access-control formats live. Casi-Rusco built it, GE Security acquired it, UTC absorbed GE Security, Interlogix carried the torch — and through every change of logo, the readers on the walls kept expecting the same 40-bit data structure. Facilities that standardized on it decades ago often still run it today, and sourcing replacement credentials has grown harder with each corporate transition as legacy stock thinned out. That's precisely the situation compatible-by-specification supply exists for: the format is a documented 40-bit Wiegand structure, and we program unbranded cards and fobs to your site's values — verified against the C10106 layout before shipping — so a thirty-year-old ProxLite installation keeps issuing badges without a migration project. When you are ready to modernize, we'll tell you honestly what the upgrade paths look like; until then, the readers you own keep working.
Casi-Rusco C10106 (40-bit Proximity) specifications
- System brand
- Casi-Rusco (later GE Security / UTC Fire & Security / Interlogix)
- Technology
- Passive RFID proximity (standard Wiegand)
- Frequency
- 125 kHz
- Credential platform
- Standard 125 kHz proximity IC programmed in the C10106 40-bit Wiegand structure
- Bit formats
- C10106 40-bit Wiegand (the 'Casi 40-bit' format used by GE Entree-lineage systems)
- OEM part numbers
- CXCRD, CXISO, CXKEY
Specifications reviewed August 2026
Our compatible Casi-Rusco C10106 (40-bit Proximity) credentials
American Key Cards manufactures unbranded 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 before they ship.
Full specifications, form factors and ordering FAQ: Standard 125 kHz proximity cards
American Key Cards is an independent manufacturer of unbranded, compatible-by-specification credentials. We are not affiliated with, endorsed by, or sponsored by Casi-Rusco / GE (UTC Interlogix), and we never supply OEM-branded product — for brand-original credentials, order from Casi-Rusco / GE (UTC Interlogix) or an authorized dealer. Brand names appear only to identify compatibility, and all trademarks remain the property of their respective owners.
Where Casi-Rusco C10106 (40-bit Proximity) is used
- Legacy Casi-Rusco ProxLite installations still in active service
- GE Security / GE Entree access deployments on the C10106 format
- UTC Fire & Security and Interlogix sites maintaining original 40-bit readers
- Badge replacement for buildings that haven't migrated off the platform
Works with these readers
Related formats
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HID Prox H10301 (Standard 26-Bit)
The most widely deployed proximity format in North America: 26-bit Wiegand — an 8-bit facility code plus 16-bit card number — on the 125 kHz HID Prox platform, live on millions of doors.
View compatible cardsAWID 37-Bit
AWID's extended-capacity format: a 35-bit globally unique card number in the H10302 structure — no facility code at all — carried over AWID's 125 kHz air interface for larger fleets that outgrew 26-bit.
View compatible cardsIndala FlexPass 26-Bit
The classic Indala credential: standard 26-bit facility-code-plus-card-number data delivered over Indala's PSK-modulated air interface — a different radio language from other 125 kHz systems, on millions of legacy doors.
View compatible cardsCasi-Rusco C10106 (40-bit Proximity) — FAQ
What is the C10106 40-bit format?
The proprietary 40-bit Wiegand structure used by Casi-Rusco ProxLite systems and their GE Entree-lineage successors — a larger data layout than the common 26-bit, carrying the site's coding scheme in a form those panels were built around.
Why does my hardware carry Casi-Rusco, GE, UTC, or Interlogix branding interchangeably?
Corporate history. The product line passed from Casi-Rusco to GE Security, then into UTC Fire & Security, then Interlogix. The badge on the reader changed; the credential format underneath did not, which is why one compatible specification serves all of them.
What do you need to program C10106 credentials for my site?
The encoded values from your existing fleet — typically recoverable from your access software's records or a working sample card. Because 40-bit layouts carry site-specific structure, we always verify against a known-good credential before production.
Should we keep buying credentials or migrate the system?
If the readers and panel serve you well, credentials are the cheap part — many sites run C10106 happily for years more. Migration makes sense when hardware fails or security requirements change; that's a project decision, and buying today's badges doesn't lock you out of it.