RFC 4, “Network timetable”, is an Unknown document published in March 1969 by E.B. Shapiro. The canonical text is published by the RFC Editor.
The standards-track status of this early RFC was never formally classified.
The canonical text of RFC 4 is hosted at rfc-editor.org. Available in TXT,HTML.
In total there are 156 users online: 0 registered, 150 guests and 6 bots.
Most users ever online was 1,315 on 17 Jun 2026, 2:20 pm.
Users active in the past 15 minutes. Total registered members: 356
Cookie preferences
Each category below sets a Google Consent Mode v2 signal. Necessary cookies cannot be switched off because they keep the site working. Everything else defaults to off until you choose.
Strictly necessary
Login, session, security and load-balancing cookies. Without these the site does not work.
Analytics
Google Analytics 4 (page views, time on page, source attribution). Aggregated only, never sold.
Advertising
Google AdSense and ad measurement tags. Without this category, ads are non-personalised (cookieless).
Personalisation
Remember preferences such as theme, language, and reading position so they persist between visits.