Three characters on the .net in the X-for-Y form. N4B reads as network for business, nodes for blockchain, or news for business.
Network for business is the plainest and most useful. Business networking platforms, referral networks, and industry associations all fit, and the .net extension is literally accurate for any of them.
News for business suits a trade publication or a briefing service, where the audience is professional and arrives by subscription.
The underlying case, as with every three-character name, is that the supply is fixed and the demand isn’t. New companies form continuously, each one needs a name, and the shortest usable lengths were fully claimed decades ago. What circulates is only what existing holders release, and most of them don’t.
Short, structured, no spelling ambiguity, fits anywhere.
The name is available. Offers considered.