Editing Top-level domain (section)

===New TLDs===
Following a 2014 resolution by ICANN, newly registered TLDs must implement the following A, MX, TXT, and SRV apex DNS records – where <code><nowiki><TLD></nowiki></code> stands for the registered TLD – for at least 90 days:<ref>{{cite web |title=Name Collision Occurrence Assessment |first=Akram |last=Atallah |publisher=[[ICANN]] |date=4 August 2014 |url=https://newgtlds.icann.org/sites/default/files/agreements/name-collision-assessment-04aug14-en.htm |access-date=17 August 2021}}</ref>

<syntaxhighlight lang="zone" style="font-size:85%">
<TLD>. 3600 IN MX  10      your-dns-needs-immediate-attention.<TLD>.
<TLD>. 3600 IN SRV 10 10 0 your-dns-needs-immediate-attention.<TLD>.
<TLD>. 3600 IN TXT         "Your DNS configuration needs immediate attention see https://icann.org/namecollision"
<TLD>. 3600 IN A           127.0.53.53
</syntaxhighlight>

This requirement is meant to avoid domain name collisions when new TLDs are registered. For example, programmers may have used custom local domains such as ''foo.bar'' or ''test.dev'', which would both collide with the creation of gTLDs [[.bar]] in 2014 and [[.dev]] in 2019.

While this does create apex DNS records of type A and MX, they do not qualify as a dotless domain, as the records should not point to real servers. For instance, the A record contains the IP 127.0.53.53, a loopback address (see [[IPv4#Addressing|IPv4 § Addressing]]), picked as a mnemonic to indicate a DNS-related problem, as [[List of TCP and UDP port numbers|DNS uses port 53]].<ref>{{cite web |title=Name Collision Resources & Information |publisher=[[ICANN]] |url=https://www.icann.org/resources/pages/name-collision-2013-12-06-en |access-date=17 August 2021}}</ref>