Summary

  • NIA dates the introduction of Korea’s country-code domain .kr to 1986; its account dates the dedicated KAIST–Hawaii line that brought direct Internet connection to 1990.
  • Korean researchers already had international contact through EUNET, email exchange and CSNET before that line. The four-year gap separates infrastructure layers, not “offline” from “online.”

Internet history likes a clean arrival date. Korea’s records make the question do some work.

The National Information Society Agency’s 2013 Internet White Paper places the introduction of the country domain .kr in 1986. A 1997 article by Jeon Kilnam, hosted by NIA, describes a different milestone: a dedicated line between KAIST and the University of Hawaii in 1990, which it associates with direct Internet connection. Four calendar years sit between those entries. The nouns matter as much as the dates.

Korea’s network did not begin in 1986. ETRI dates the opening of the System Development Network, or SDN, to 15 May 1982, when a Seoul National University PDP-11 and an ETRI VAX 11/780 were linked over a 1,200 bps dedicated line. The participating computers used TCP/IP. KAIST joined SDN in January 1983. That was a domestic research network with an international protocol stack, not the later KAIST–Hawaii circuit.

Nor did international contact wait for 1990. Jeon Kilnam’s NIA-hosted account says SDN reached Europe’s EUNET through the Netherlands in August 1983, and that email exchange with the United States began that October. In December 1984, SDN connected to CSNET through a service provided by the U.S. Geological Survey. ETRI also dates the CSNET connection to 1984. Mail, academic network links and a dedicated direct Internet line describe different kinds of reach.

That is why 1986 is a useful date with a precise claim attached: NIA records the introduction of .kr. The agency’s 2018 white paper says the early .kr system used third-level domains such as kisa.or.kr; Korean second-level names under .kr followed in 2003, with English second-level names such as kisa.kr in 2006. The familiar-looking country suffix took shape in stages.

NIA’s available timeline gives the year of introduction, not the first registered .kr name or the exact root-zone delegation date. A contemporary delegation record or initial zone file would establish that finer point.

The sequence is not a contest over which anniversary gets the cake. In 1982, Korean research institutions linked computers using TCP/IP. By 1983–84, mail and network connections crossed borders. NIA places .kr in 1986. The direct KAIST–Hawaii line followed in 1990. A country’s Internet history is easier to understand when each date names the thing that actually changed.

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