Port 991 — nas

Well-known port 991 (tcp/udp): Netnews Administration System. Service name: nas. Referenced in RFC4707.

port kind port status standard verification verified tier A iana-registry-row@1

registry record

value: 991

references: RFC4707

Service Name	nas
Port Number	991
Transport Protocol	tcp
Description	Netnews Administration System
Assignee	[Vera_Heinau][Heiko_Schlichting]
Contact	[Vera_Heinau][Heiko_Schlichting]
Registration Date
Modification Date	2017-02-10
Reference	[RFC4707]
Service Code
Unauthorized Use Reported
Assignment Notes

source: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
version: IANA registry, Last-Modified: Fri, 29 May 2026 01:11:28 GMT
retrieved: 2026-05-29 · updated: 2026-05-29

agent: curl -H 'accept: application/json' wire.phall.io/port/991 or /port/991.json