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# Your iOS App Has To Be IPv6 Ready before 1st June.
- URL: https://developerinsider.co/your-ios-app-has-to-be-ipv6-ready-before-1st-june/
- Published: 2016-05-18T16:06:58.000Z
- Updated: 2018-03-29T17:00:50.000Z
- Author: Vineet Choudhary
- Tags: News, iOS, Apple

At WWDC 2015 Apple announced the transition to IPv6-only network services in iOS 9\. Starting June 1, 2016 all apps submitted to the App Store must support IPv6-only networking. Most apps will not require any changes because IPv6 is already supported by NSURLSession and CFNetwork APIs.

If your app uses IPv4-specific APIs or hard-coded IP addresses, you will need to make some changes.

Learn how to ensure compatibility by reading [Supporting IPv6 DNS64/NAT64 Networks](https://developer.apple.com/library/prerelease/mac/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/UnderstandingandPreparingfortheIPv6Transition/UnderstandingandPreparingfortheIPv6Transition.html?ref=developerinsider.co).

**Source** \- [Apple Developer News](https://developer.apple.com/news/?ref=developerinsider.co)