This applies to any TLD though, not just .dev and .prod, not just gTLDs generally, and not even just real TLDs (that's right, you could be using a fake TLD on a

This applies to any TLD though, not just .dev and .prod, not just gTLDs generally, and not even just real TLDs (that's right, you could be using a fake TLD on an internal network somewhere and the "creation" of a domain on that fake TLD on that network could cause your previously working hostname shortcuts to start failing). Relying on DNS search lists to find the right host is a bad security practice that has caused security incidents even outside the context of the creation of new TLDs. It's best to always use fully-qualified domain names. A lot of people responsible for implementing DNS search lists in the first place now regret having ever created them. More info at https://www.icann.org/en/system/files/files/sac-064-en.pdf https://www.icann.org/en/system/files/files/sac-064-en.pdf (particularly section 4.1.3 and the preceding logic leading up to it).