World Telephone Numbering Guide

Updated 2 June 2011

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Laos

+856

Number Format

Area Code:            2 digits
Subscriber Number:    6 digits
Trunk Prefix:         0
International Prefix: 00

Area code information

1 June 2010 - mobile numbers from 7 to 8 digits

A digit was prepended to 7-digit mobile subscriber numbers, after the +856 20 mobile area code, based on the mobile carrier as follows:

Old numbers      New numbers       Carrier
-----------      -----------       -------
+856 20 2xxxxxx  +856 20 22xxxxxx  ETL
+856 20 3xxxxxx  +856 20 23xxxxxx  ETL
+856 20 4xxxxxx  +856 20 54xxxxxx  ETC
+856 20 5xxxxxx  +856 20 55xxxxxx  ETC
+856 20 6xxxxxx  +856 20 56xxxxxx  ETC
+856 20 7xxxxxx  +856 20 77xxxxxx  MLL
+856 20 8xxxxxx  +856 20 98xxxxxx  STL
+856 20 9xxxxxx  +856 20 99xxxxxx  STL

Source: NAPT announcement (18 January 2011, via ITU)

(with report courtesy Sergiu Rosenzweig)

1 August 2003 - Millicom mobile numbers

On 1 August 2003, 6-digit mobile subscriber numbers in Laos (+856 20) were changed to 7-digit by prepending a digit as follows:

Old format      New format
==========      ==========
+856 20 2xxxxx  +856 20 22xxxxx
+856 20 3xxxxx  +856 20 23xxxxx
+856 20 4xxxxx  +856 20 54xxxxx
+856 20 5xxxxx  +856 20 55xxxxx
+856 20 6xxxxx  +856 20 56xxxxx
+856 20 7xxxxx  +856 20 77xxxxx
+856 20 9xxxxx  +856 20 99xxxxx

Source: Ministry of Communications, Transport, Posts and Construction announcement (via ITU, 16 July 2003).

April 2003 - Millicom mobile numbers

New mobile carrier Millicom entered service in Laos in 2003. It was assigned numbers under +856 20 7xxxxx and +856 20 8xxxxx.

15 September 1994

Uniform plan of 2-digit area code followed by 6-digit area code began. '21' was prepended to 4-digit subscriber numbers outside Vientiane.

See Laos 1994 renumbering document as submitted to ITU.

Other information

See carrier Laotel.

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