# Is there a way to select a callback URL port in the request?

**URL:** <https://community.auth0.com/t/is-there-a-way-to-select-a-callback-url-port-in-the-request/73176>\
**Category:** Get Help\
**Tags:** callback-urls, native\
**Created:** [November 15, 2021, 5:39pm UTC](https://community.auth0.com/t/is-there-a-way-to-select-a-callback-url-port-in-the-request/73176 "2021-11-15T17:39:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mwells](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/mwells/32/26267_2.png) [@mwells](https://community.auth0.com/u/mwells)\
**Post date:** [November 15, 2021, 5:39pm UTC](https://community.auth0.com/t/is-there-a-way-to-select-a-callback-url-port-in-the-request/73176/1 "2021-11-15T17:39:03Z")

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We are implementing OAuth for a Windows desktop app using a loopback HTTP listener to receive the tokens. [This thread](https://community.auth0.com/t/random-local-ports-on-redirect-uri/28623) asks about using a wildcard port in the callback URL, and it was mentioned that this isn’t currently supported. Has it been implemented since then, or if not, are there plans to implement it?

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**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\
**Post date:** [November 16, 2021, 10:21pm UTC](https://community.auth0.com/t/is-there-a-way-to-select-a-callback-url-port-in-the-request/73176/3 "2021-11-16T22:21:26Z")

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Hi @mwells,

Welcome to the Auth0 Community and thanks for reaching out. [This document](https://auth0.com/docs/configure/applications/wildcards-for-subdomains) lists the current allowed usage on wildcards. The situation remains the same as in the post you linked.

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**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [December 1, 2021, 10:21pm UTC](https://community.auth0.com/t/is-there-a-way-to-select-a-callback-url-port-in-the-request/73176/4 "2021-12-01T22:21:59Z")

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