Not as interactive as the zip-code map I posted two nights ago, but here is a useful area code map, from the comprehensive site LincMad, run by a telecommunications consultant here in San Francisco. Nice to be an expert in something. Seriously, I’m impressed (if mildly frightened) by the way this person’s vocation and avocation come together to create a truly useful collection of information… and the web lets him share it, demonstrating his expertise. [via ongoing]