# Hong Kong phone number +85250260414 flagged as invalid — why?

**URL:** <https://community.auth0.com/t/hong-kong-phone-number-85250260414-flagged-as-invalid-why/198914>\
**Category:** Get Help\
**Tags:** configuration, application\
**Created:** [April 14, 2026, 9:48am UTC](https://community.auth0.com/t/hong-kong-phone-number-85250260414-flagged-as-invalid-why/198914 "2026-04-14T09:48:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![louis.lui.ext](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/louis.lui.ext/32/72645_2.png) [@louis.lui.ext](https://community.auth0.com/u/louis.lui.ext)\
**Post date:** [April 14, 2026, 9:48am UTC](https://community.auth0.com/t/hong-kong-phone-number-85250260414-flagged-as-invalid-why/198914/1 "2026-04-14T09:48:23Z")

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Hi Auth0 community,

I’m running into an issue where a Hong Kong phone number is being flagged as invalid, and I’m trying to understand the root cause.

**The number:** `+85250260414`

**The validation regex:** `/^\+[0-9]{1,15}$/`

When I test this number against the regex, it passes:

- Starts with `+` ✅
- Followed by 11 digits (`85250260414`) ✅
- Within the 1–15 digit range ✅
- No spaces or special characters ✅  
However, the number is still being flagged as invalid somewhere in the Auth0 flow.

It is working if I use `8525"1"260414`

Any insight would be appreciated. Thanks!

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**Author:** ![nik.baleca](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/nik.baleca/32/68749_2.png) [@nik.baleca](https://community.auth0.com/u/nik.baleca)\
**Post date:** [April 15, 2026, 3:59pm UTC](https://community.auth0.com/t/hong-kong-phone-number-85250260414-flagged-as-invalid-why/198914/3 "2026-04-15T15:59:38Z")

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Hi @louis.lui.ext

When do you receive this specific error?

When going through an MFA enrollment process, I was able to use a HK phone number as expected without any issues.

If you are trying to add a phone number either through the Management API or via the Dashboard, if the phone number is not an attribute assigned to the connection OR if you are not using a passwordless SMS connection, it will through the respective error.

Could you also double check if the phone number you are trying to use is indeed a valid HK number which does not violate any other rules?(such as the region codes

Let me know if you have any other questions!

Kind Regards,  
Nik

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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:** [April 29, 2026, 3:59pm UTC](https://community.auth0.com/t/hong-kong-phone-number-85250260414-flagged-as-invalid-why/198914/4 "2026-04-29T15:59:53Z")

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