TCP 91
Synopsis
- TCP port 91 is assigned to the MIT Dover Spooler (service name: mit-dov), a print‑spooling protocol for Xerox Dover laser printers.
- It was used in practice at MIT (e.g., the MIT AI Lab and Project Athena) and other ARPANET-era sites in the 1980s to queue and deliver print jobs to Dover printers.
- There are no widely deployed modern applications that use TCP/91 today.
Observed activity
Last 30 days
Detailed chart