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# `user_id` and `is_group_number` deprecated on phone numbers

The distinction between group and personal phone numbers is being retired.

The `sharing` field on the
[Request an internal phone number](https://developer.close.com/api/resources/phone-numbers/create)
endpoint is deprecated and will be removed in a future update.
It is now optional, and defaults to `personal` if omitted. To
create a group phone number, you must pass `group`.

The `user_id` and `is_group_number` fields on the
[Phone Number API](/api/resources/phone-numbers/list) are deprecated, both as
query filters when listing phone numbers and as fields in
phone number responses. Reading these fields requires no 
changes today. They will be removed in a future update.

To filter phone numbers by user, use the new `participant_user_id` query
parameter, which returns every number the user participates in. Because it
also matches group numbers the user belongs to, it can return more results
than `user_id` did.