---
title: identifier
framework: corenfc
role: symbol
role_heading: Instance Property
path: corenfc/nfcmifaretag/identifier
---

# identifier

The unique hardware identifier of the tag.

## Declaration

```swift
var identifier: Data { get }
```

## Discussion

Discussion The identifier data is in big-endian byte order.

## See Also

### Getting Tag Information

- [mifareFamily](corenfc/nfcmifaretag/mifarefamily.md)
- [NFCMiFareFamily](corenfc/nfcmifarefamily.md)
- [historicalBytes](corenfc/nfcmifaretag/historicalbytes.md)