---
title: nd_opt_pref64_prefix
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 12.0+]
path: kernel/nd_opt_pref64/3754136-nd_opt_pref64_prefix
---

# nd_opt_pref64_prefix

## Declaration

```occ
u_int32_t nd_opt_pref64_prefix[3];
```