Eswatini, then known as Swaziland, was allocated the country code +268 by the International Telecommunication Union, in the late 1960s.^[1] To call a telephone number in Eswatini, the following format is used:

yy xx xxxx

calls from within Eswatini

+268 yy xx xxxx

calls from outside Eswatini

Subscriber numbers were extended by a digit with '2' prepended to fixed numbers and '7' to mobile/GSM numbers.^{[3] [4]}

Expanded mobile numbers (+268 6xxxxxx) took effect 1 March 2010. Old dialling format was allowed until the mandatory date of 1 June 2010.

Fixed numbers were expanded on 1 February 2011, postponed from the previously scheduled 1 August 2010, with mandatory use on 1 May 2011 (previously scheduled 1 November 2010).

Until the 1990s, Swaziland was integrated into the South African telephone numbering plan; calls from South Africa to Swaziland were made using the code 0194.^[5] Calls to South Africa from Swaziland, however, required the use of the regional code 07.^[6] Calls to Lesotho were similarly made using the regional code 05 while those to Mozambique were made using the code 06.^[7]