2754.net
Four digits is phone-number territory, a chunk size people are already practised at holding in memory. That’s a genuine usability advantage and it applies in every language.
Numeric domains are their own market with their own logic, and universality drives it. A four-digit string reads identically to a speaker of Mandarin, Arabic, Spanish or English, with no pronunciation problem, no accidental meaning and no spelling question. That’s why the short numeric sets held value through cycles that flattened the keyword market.
Practically it suits any business using numeric identifiers naturally: a channel, a station, a model line, a route, a shortcode service.
The .net keeps it reachable while remaining entirely appropriate for a technical or service business. Nothing about a number requires a .com to make sense.
Four digits, no letters, nothing to spell, fixed global inventory.
Offers welcome.