Editing Postal code (section)

=== Codes defined along administrative borders ===
Some postal code systems, like those of [[Ecuador]] and [[Costa Rica]], show an exact agreement with the hierarchy of [[administrative division]]s.

Format of six digit numeric (eight digit alphanumeric) [[postal codes in Ecuador]], introduced in December 2007: ECAABBCC
: EC – [[ISO 3166-1 alpha-2]] country code
: AA – one of the 24 [[provinces of Ecuador]]
: BB – one of the 226 [[cantons of Ecuador]]
: CC – one of the [[parishes of Ecuador]].

Format of five digit numeric [[Postal codes in Costa Rica]], introduced in 2007: ABBCC
: A – one of the seven [[provinces of Costa Rica]]
: BB – one of the 81 [[cantons of Costa Rica]]
: CC – one of the [[districts of Costa Rica]].
In Costa Rica these codes were originally used as district identifiers by the [[National Institute of Statistics and Census of Costa Rica]] and the [[Administrative divisions of Costa Rica|Administrative Territorial Division]], and continue to be equivalent.<ref name="divadm">{{cite web |language=es |title=Declara oficial para efectos administrativos, la aprobación de la División Territorial Administrativa de la República N°41548-MGP |url=http://www.pgrweb.go.cr/scij/Busqueda/Normativa/Normas/nrm_texto_completo.aspx?param1=NRTC&nValor1=1&nValor2=88416&nValor3=115607&param2=1&strTipM=TC&lResultado=1&strSim=simp |website=Sistema Costarricense de Información Jurídica |access-date=26 September 2020 |date=19 March 2019}}</ref><ref name="dta2017">{{cite book |language=es |title=División Territorial Administrativa de la República de Costa Rica|date=8 March 2017|publisher=Editorial Digital de la Imprenta Nacional|isbn=978-9977-58-477-5|url=https://www.imprentanacional.go.cr/editorialdigital/libros/historiaygeografia/division_17.pdf}}</ref>

The first two digits of the [[postal codes in Turkey]] correspond to the [[provinces of Turkey|provinces]] and each province has assigned only one number. They are the same for them as in [[ISO 3166-2:TR]].<ref>{{cite web |url=http://www.postakodumne.com |archive-url=https://web.archive.org/web/20110404005656/http://www.postakodumne.com/ |archive-date=4 April 2011 |title=Posta Kodum Ne |language=Turkish |access-date=25 August 2021}}</ref>

The first two digits of the [[postal codes in Vietnam]] indicate a [[provinces of Vietnam|province]]. Some provinces have one, other have several two digit numbers assigned. The numbers differ from the number used in [[ISO 3166-2:VN]].