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Home       Phones and Plans       International Roaming       Calling Overseas

1638 IDD

Country & area code
Country / Region International call prefix Area Code Time Difference
LAOS 老撾 856 --- -1

IDD tariff (HK$/min)
Country / Region Peak Rate*
(9:00AM - 8:59PM) 		Off Peak Rate*
(9:00PM - 8:59AM)
LAOS 老撾 7.5 7.5

* The above charges are applicable for designated customers. If you would like to enquire about the charges for your registered 1638 IDD, please call our hotline at 2880 2688.


  • Prices are subject to change without prior notice.
  • When dialing an overseas number retrieved from the phone’s call history, a standard 001 IDD tariff will be charged.
  • Calling to Australia: Call to the prefix "61145" & "61147" are charged at HK$34.8/min.
  • Calling to UK: Calls to the prefix "4455", "4456", "447", "448" & "449" are charged at the rate of calling UK mobile phone numbers.
  • If duration of a call covers two time zones, calling rate at the time of connection will be applied to the whole call.
  • Subject to relevant terms and conditions. Please click here for details.
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