More Sectors, More Applications
Mifare Classic 4K expands on the 1K variant with 4KB of memory arranged across 40 sectors — the first 32 sectors follow the standard 4-block structure, while the remaining 8 are larger 16-block sectors. This gives developers significantly more space to partition independent application data on a single card.
It's the preferred choice for multi-application deployments — a single card that handles building access, canteen payments, and car park entry, each in its own isolated sector. Like Mifare Classic 1K, it uses proprietary Crypto-1 and requires a compatible reader; it is not natively readable by most smartphone NFC apps.
- 4096 bytes (4KB) memory — 40 sectors total
- First 32 sectors: 4 blocks each; last 8 sectors: 16 blocks each
- Independent Key A and Key B per sector
- Ideal for multi-application deployments on one card
- ISO 14443-A compliant at the RF layer
- Requires Mifare-compatible reader hardware