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Compatible RFID & proximity credentials
The specialists who know every card format.
Security ID Systems supplies compatible access-control cards, key fobs and credentials for 369+ formats — including the specialist proprietary formats other vendors never offer compatibles for. A fraction of OEM pricing — compatible by specification, independently manufactured.
The format authority
Why a compatible exists — and why we're the ones who make it
The formats few suppliers stock
Our edge is the specialist proximity and smart-card formats most suppliers never tooled up to produce — leaving the original manufacturer as the only source, at a steep premium. We cover 369 compatible formats, including the rare ones no one else lists.
Compatible by specification, not look-alike
Every credential is encoded to present the exact data your readers already accept — the same frequency, bit format, facility code and card number. Built on T5577, EM4305 and genuine NXP MIFARE, DESFire and iCLASS-class platforms, engineered to read identically to the original.
The right product for every security tier
Open formats we encode directly to a compatible credential that reads identically. Secured smart credentials (AES, Seos) we supply as compatible blanks your own system enrols — so the keys, and your site's security, stay in your hands.
Shop by technology
Find your credential type
125 kHz LF Proximity Cards & Fobs
Compatible low-frequency proximity cards and key fobs encoded to read identically to the origi…
51 formats13.56 MHz HF Smart Cards
13.56 MHz contactless smart cards for access-control and transit — built on genuine NXP MIFARE…
37 formatsWiegand Bit-Format Cards
Compatible cards programmed to the exact Wiegand bit structure your panel expects — from 26-bi…
14 formatsHigh-Security & Custom Formats
Compatible blanks for registered and custom facility-code formats — Corporate 1000, Indala Fle…
15 formatsLegacy OEM Proximity
Compatible replacements for Indala, AWID, Kantech ioProx, Keri and Farpointe proximity credent…
64 formatsEnterprise Proprietary Formats
Compatible credentials for enterprise systems few other suppliers offer — Gallagher/Cardax, Ne…
24 formatsManaged & Cloud Access
Compatible cards and fobs for managed and cloud-based access platforms such as Kastle, Verkada…
10 formatsHotel Lock Key Cards
Compatible bulk key cards for hotel locking systems — VingCard, Saflok, Onity, Salto and speci…
57 formatsIntercom & Residential Entry Badges
Compatible residential and building-intercom badges and tokens — Noralsy, Urmet, CAME, Comelit…
12 formatsGate & HOA Fob Replacements
Compatible replacement fobs and cards for gated communities and HOAs — DoorKing, Linear, Norte…
12 formatsBlank Programmable Cards
Rewritable T5577, EM4305 and UID-writable blanks — the programmable backbone every compatible …
70 formatsNFC Tags & Cards
NTAG and NFC Forum compliant cards and tags for NFC applications, encoding and consumer tap ex…
3 formatsRare & hard-to-find formats
Compatibles others won't make
Kastle Systems 32-bit
Compatible with Kastle Systems
- Chip
- T5577 / EM4305
- Format
- 32-bit Kastle format: facility code + card n…
Lenel 42-bit (L11601-adjacent)
Compatible with Lenel
- Chip
- T5577 / EM4305
- Format
- 42-bit: parity + 14-bit site + 12-bit card +…
Verkada Pass / Verkada One (Ucode 9 UHF)
Compatible with Verkada
- Chip
- T5577 / EM4305 · Genuine NXP MIFARE
- Format
- Verkada Pass / Verkada One - 140x88mm card o…
Gallagher / Cardax IV (LF 125 kHz)
Compatible with Gallagher
- Chip
- T5577 / EM4305
- Format
- Gallagher LF format: 4-bit region code (A-P)…
HID Seos
Compatible with HID Global
- Chip
- SmartMX / JCOP secure element
- Format
- Seos applet on secure element; AES-128; SIO/…
CISA CT6 (Mifare Classic 1K, AERO/SMART)
Compatible with CISA
- Chip
- Genuine NXP MIFARE Classic 1K
- Format
- Mifare Classic 1K sector-key based
Avigilon 56-bit (Avig56)
Compatible with Avigilon
- Chip
- T5577 / EM4305
- Format
- 56-bit Avigilon Wiegand: facility code + car…
CAME TST01 (BPT) Proximity
Compatible with CAME S.p.A.
- Chip
- EM4100 / 4200
- Format
- Unique 32-bit ID, RF/64 ASK Manchester encod…
ProdataKey (PDK Red / Standard Fob)
Compatible with ProdataKey
- Chip
- Genuine NXP MIFARE DESFire EV2 / T5577
- Format
- PDK Red = MIFARE DESFire EV2 8K (EAL5+) secu…
Software House (C-CURE / iSTAR, CCOTZ 37-bit)
Compatible with Software House
- Chip
- T5577 / EM4305
- Format
- CCOTZ proprietary 37-bit credential for C-CU…
Brivo (Unified Credential, DESFire EV3 LEAF + 37-bit prox)
Compatible with Brivo
- Chip
- Genuine NXP MIFARE DESFire EV3 / T5577
- Format
- 56-bit DESFire EV3 (LEAF file structure) + 3…
Jablotron
Compatible with Jablotron
- Chip
- T5577 / EM4305
- Format
- BiPhase; 64-bit Jablotron format, decimal ID…
How it works
From a card you can't replace to a spare in three steps
Identify your format
Read the part number printed on your card, photograph the reader, or send us a sample. Our identify-your-card guide walks you through it.
We confirm compatibility
Tell us the format and quantity. We verify the encoding — frequency, bit structure, facility code — before anything is produced.
Encoded & shipped worldwide
Your credentials are encoded to read on your existing equipment and shipped anywhere, at a fraction of OEM pricing.
Shop by brand
Compatible cards for the systems you run
We encode compatible credentials for every major access-control and lock manufacturer — and dozens of niche ones. Compatible-by-specification only; not affiliated with any of them.
Solutions & knowledge base
Find your credential — or learn the format first
Compatible cards mapped to your application or access-control system, plus plain-spoken deep dives into the obscure proximity formats other vendors won't document.
By application & system
From the format blog
Request a quote
Can't find your format? Email the specialists.
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.