/** ******************************
 * Austria mobile phone number *
 *********************************/
/**
 * Mobile numbers start with 06 or 0660
 * Format: 0AA BBB BBBB (variable length with leading 0 in local format)
 * Reference: https://en.wikipedia.org/wiki/Telephone_numbers_in_Austria
 */
export declare function is_at_mobile_phone_prefix(tel: string): boolean;
/**
 * with/without +43 prefix
 */
export declare function is_at_mobile_phone(tel: number | string): boolean;
/**
 * very forgiving
 *
 * @returns +43xxxxxxxxx if valid (variable length after country code, NO leading 0 in internal format)
 *          empty string if not valid
 *
 * Format notes:
 * - Local format: 0660 12345678 (variable length WITH leading 0) - used in Austria
 * - Internal format: +43 660 12345678 (variable length after +43, NO leading 0)
 * - Display format: +43 660 12345678 (formatted by format_at_mobile_phone)
 */
export declare function to_full_at_mobile_phone(tel: string | number): string;
/**
 * @returns +43 6xx xxx xxxx if valid (or similar format)
 */
export declare function format_at_mobile_phone(tel: string | number): string;