Port 21221Air Server services
TCP port 21221 is assigned to services for Air Server, registered by AIG S.L.
- transport
- tcp
- in transit
- cleartext
- assignment
- official
- risk
- 1/10
- lookups
- 0
single transport
payload readable on path
registered with iana
safe
rank 993 of 6,404 · top 15%
also known as aigairserver
Technical Details
what runs on :21221Air Server services is registered on port :21221 over tcp to AIG S.L., assigned March 2017. We don't have a technical write-up for it beyond the IANA registry entry.
In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.
find what's listening on :21221
# linux
sudo ss -tlpn 'sport = :21221'
# macos / bsd
sudo lsof -nP -i :21221
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :21221nmap -sV -p T:21221 <host>run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.
add technical detailsSecurity Information
exposure of :21221risk score
1/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
no security notes recorded for :21221 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :21221, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :21212 | Trinket Agent | TCP | — | safe | 0 |
| :21213 | Cohesity backup agent | TCP | — | safe | 0 |
risk mix of the 2 listed
- safe100%
0 of 2 encrypted