The first-ever website used what top-level domain? in Wikipedia

1.  List of Internet top-level domains
This list of Internet toplevel domains (TLD) contains toplevel domains, which are those domains in the DNS root zone of the Domain Name System of the Internet…
https://en.wikipedia.org/wiki/List of Internet top-level domains

2.  .dk
code toplevel domain (ccTLD) for Denmark. The supervision of the .dk toplevel domain is handled exclusively by DK Hostmaster. Any new .dk domain name…
https://en.wikipedia.org/wiki/.dk

3.  Internationalized domain name
country code toplevel domains (IDN ccTLDs) in the Internet that use the IDNA standard for native language scripts. In May 2010 the first IDN ccTLD were…
https://en.wikipedia.org/wiki/Internationalized domain name

4.  .gr
.gr is the country code toplevel domain (ccTLD) for Greece. Registrations are processed via accredited registrars and domain names in Greek characters…
https://en.wikipedia.org/wiki/.gr

5.  .is
.is (dot is) is the toplevel domain for Iceland. The country code is derived from the first two letters of Ísland, which is the Icelandic word for Iceland…
https://en.wikipedia.org/wiki/.is

6.  .pk
.pk is the designated Internet country code toplevel domain (ccTLD) for Pakistan. PKNIC is the only organization endorsed by the Government of Pakistan…
https://en.wikipedia.org/wiki/.pk

7.  .cs
Until the deletion of .yu in 2010, .cs was the most heavily used toplevel domain ever to be deleted. Statistics from the RIPE Network Coordination Centre…
https://en.wikipedia.org/wiki/.cs

8.  AlSaudiah
toplevel domain for Saudi Arabia. The toplevel domain was installed in the DNS on May 5, 2010. It was among the first non-Latin toplevel domains to…
https://en.wikipedia.org/wiki/AlSaudiah

9.  History of the Internet
the first speculative investment bubble related to the Internet took place, in which "dot-com" companies (referring to the ".com" top level domain used…
https://en.wikipedia.org/wiki/History of the Internet

10.  Switzerland
the ISO banking code "CHF" for the Swiss franc, and the country toplevel domain ".ch", are both taken from the state’s Latin name). Helvetica is derived…
https://en.wikipedia.org/wiki/Switzerland