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Home       Phones and Plans       Roaming & IDD       Calling Overseas

1638 IDD

Country & area code
Country / Region International call prefix Area Code Time Difference
USA 美國 1 -13 to -18
Alaska 阿拉斯加 1 907 -17
Atlanta 亞特蘭大 1 404 -13 to -18
Boston 波士頓 1 617 -13 to -18
Brooklyn 布魯克林 1 718 -13 to -18
Chicago 芝加哥 1 312 -13 to -18
Denver 丹佛 1 303 -13 to -18
Hawaii 夏威夷 1 808 -13 to -18
Houston 侯斯頓 1 713 -13 to -18
Los Angeles 洛杉磯 1 213 -13 to -18
Miami 邁阿密 1 305 -13 to -18
New Orleans 新奧爾良 1 504 -13 to -18
New York City 紐約市 1 212 -13 to -18
New York 紐約 1 212 -13 to -18
Salt Lake City 鹽湖城 1 801 -13 to -18
San Francisco 三藩市 1 415 -13 to -18
Seattle 西雅圖 1 206 -13 to -18
Washington D.C. 華盛頓 1 202 -13 to -18

IDD tariff (HK$/min)
Country / Region Peak Rate*
(9:00AM - 8:59PM)
Off Peak Rate*
(9:00PM - 8:59AM)
USA 美國 0.5 0.26

* 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.


  • The above rates are valid from 15 Nov, 2017. 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.