Three characters, .net, in the X-for-Y shape. N4D reads as network for development, which is a phrase with genuine currency in the aid and technology sectors.
Development networks are real institutional structures: research and education networks, regional connectivity initiatives, and consortia that pool infrastructure across countries. Several of them use naming in exactly this form, and the .net extension is literally accurate for a network.
Other readings hold up: nodes for developers, news for democracy, notifications for devices. The 4-as-for convention is flexible enough to carry any of them without straining.
The underlying asset is three characters on a major extension, a set that closed decades ago. What circulates is what existing holders release, and the trend is toward fewer rather than more as names settle into long-term use.
Short, parseable, and legible to both a technical audience and an institutional one.
Offers considered.