---
title: loopback
framework: network
role: symbol
role_heading: Type Property
path: network/ipv4address/loopback
---

# loopback

The device’s loopback address (127.0.0.1).

## Declaration

```swift
static let loopback: IPv4Address
```

## See Also

### Setting Well-Known Addresses

- [any](network/ipv4address/any.md)
- [broadcast](network/ipv4address/broadcast.md)
- [allHostsGroup](network/ipv4address/allhostsgroup.md)
- [allRoutersGroup](network/ipv4address/allroutersgroup.md)
- [allReportsGroup](network/ipv4address/allreportsgroup.md)
- [mdnsGroup](network/ipv4address/mdnsgroup.md)