Postal codes were introduced in France in 1964, when La Poste introduced automated sorting. They were updated to use the current 5 digit system in 1972.
A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
.yu was the Internet country code top-level domain (ccTLD) that was assigned to SFR Yugoslavia in 1989 and was mainly used by Serbia and Montenegro and its two successor states. After Montenegro and Serbia acquired separate .me and .rs domains in 2007, a transition period started, and the .yu domain finally expired in 2010.
.fr is the Internet country code top-level domain (ccTLD) in the Domain Name System of the Internet for France. It is administered by AFNIC. The domain includes all individuals and organizations registered at the Association française pour le nommage Internet en coopération (AFNIC).
.wf is the Internet country code top-level domain (ccTLD) for the Wallis and Futuna Islands. This top-level domain is run by the AFNIC and registrations are open to all.
.re is the Internet country code top-level domain (ccTLD) for Réunion. Along with .fr, .tf, and .ovh, it is administered by AFNIC.
.tf is the Internet country code top-level domain (ccTLD) for the French Southern and Antarctic Lands. Along with .fr, .pm, .re, .wf and .yt it is administered by AFNIC. Before 23 October 2004, Adamsnames, based in Cambridge in the United Kingdom, administered this TLD.
.gf is the country code top-level domain (ccTLD) for French Guiana. It is delegated to the ISP Canal+ Telecom.
.gp is the country code top-level domain (ccTLD) for Guadeloupe. Pricing differs for Guadeloupians compared to other Internet users.
.mq is the Internet country code top-level domain (ccTLD) for Martinique.
.pm is the country code top-level domain (ccTLD) for Saint Pierre and Miquelon. It is managed by AFNIC, with registration services opening on 6 December 2011.
The Collectivity of Saint Martin, commonly known as simply Saint Martin, is an overseas collectivity of France in the West Indies in the Caribbean, on the northern half of the island of Saint Martin, as well as some smaller adjacent islands. Saint Martin is separated from the island of Anguilla by the Anguilla Channel. Its capital is Marigot.
.bl is an Internet country code top-level domain (ccTLD) that was to be created for Saint Barthélemy, following the decision on 21 September 2007 by the ISO 3166 Maintenance Agency to allocate BL as the ISO 3166-1 alpha-2 code for Saint Barthélemy. This decision followed Saint Barthélemy's new status as an Overseas collectivity of France which took effect on 15 July 2007. Currently Saint Barthélemy uses Guadeloupe's ccTLD, .gp, and France's ccTLD, .fr.
The following outline is provided as an overview of and topical guide to the Collectivity of Saint Martin:
ISO 3166-2:BL is the entry for Saint Barthélemy in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions of all countries coded in ISO 3166-1.
ISO 3166-2:GP is the entry for Guadeloupe in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions of all countries coded in ISO 3166-1.
ISO 3166-2:MF is the entry for Saint Martin in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions of all countries coded in ISO 3166-1.
.sx is the country code top-level domain (ccTLD) in the Domain Name System of the Internet for Sint Maarten.
.bq is designated—but not in use—as the Internet country code top-level domain (ccTLD) for Bonaire, Sint Eustatius and Saba following the assignment on December 15, 2010, by the ISO 3166 Maintenance Agency of BQ as the ISO 3166-1 alpha-2 to the area. This decision followed the dissolution of the Netherlands Antilles and new status of the Caribbean Netherlands as public bodies of the Netherlands on October 10, 2010.
.cw is the Internet country code top-level domain (ccTLD) for Curaçao. It was created following the decision on December 15, 2010 by the ISO 3166 Maintenance Agency to allocate CW as the ISO 3166-1 alpha-2 code for Curaçao. This decision followed Curaçao's new status as an autonomous country within the Kingdom of the Netherlands on October 10, 2010. The University of Curaçao, which already was the sponsor for .an was designated as the sponsoring organization. Registration of .cw domains was available from 1 February 2012.
Saint Martin 
