Network Port
FTP
Port 21
Well-known service: FTP
Total Hosts
2,349,057
last 90 d
Countries
12
distinct
Top Software
—
from banners
CVE Hits
—
NVD feed pending
Service Detail
Port
21
Protocol
TCP / UDP
Service
FTP
IANA Reserved
—
Common Risk
—
Top Software on this Port
No banners yet
banner-sweep hasn't fingerprinted a host on this port yet.
Top Countries
Top ASNs
| ASN | Name | IPs |
|---|---|---|
| AS396982 | Google Cloud | 38,112 |
| AS37963 | Alibaba (China) | 19,712 |
| AS4837 | China Unicom | 13,448 |
| AS12824 | home.pl S.A. | 12,324 |
| AS7029 | Uniti Kinetic | 10,543 |
| AS16276 | OVHcloud | 10,170 |
| AS19551 | Thales/Imperva | 9,270 |
| AS6079 | Astound | 8,483 |
| AS26496 | GoDaddy | 7,436 |
| AS9597 | KDDI Web Communications | 7,335 |
| AS174 | Cogent Communications, Inc. | 7,267 |
| AS24940 | Hetzner Online | 7,240 |
Recently Seen on Port 21
Hosts most recently observed with this port open in our scan sweep.
CVE Matches
No version-matched CVEs
No published CVE exactly matches a software version seen on this port. Banners often omit versions, which limits precise matching.