dilihat dari penomorannya, port udp dan tcp dibagi menjadi tiga jenis, yakni sebagai berikut:
well-known port: yang pada awalnya berkisar antara 0 hingga 255 tetapi kemudian diperlebar untuk mendukung antara 0 hingga 1023.
port number yang termasuk ke dalam well-known port, selalu merepresentasikan layanan jaringan yang sama, dan ditetapkan oleh internet assigned number authority (iana).
beberapa di antara port-port yang berada di dalam range well-known port masih belum ditetapkan dan direservasikan untuk digunakan oleh layanan yang bakal ada pada masa depan.
well-known port didefinisikan dalam rfc 1060.
registered port: port-port yang digunakan oleh vendor-vendor komputer atau jaringan yang berbeda untuk mendukung aplikasi dan sistem operasi yang mereka buat.
registered port juga diketahui dan didaftarkan oleh iana tetapi tidak dialokasikan secara permanen, sehingga vendor lainnya dapat menggunakan port number yang sama.
range registered port berkisar dari 1024 hingga 49151 dan beberapa port di antaranya adalah dynamically assigned port.
dynamically assigned port: merupakan port-port yang ditetapkan oleh sistem operasi atau aplikasi yang digunakan untuk melayani request dari pengguna sesuai dengan kebutuhan.
dynamically assigned port berkisar dari 1024 hingga 65536 dan dapat digunakan atau dilepaskan sesuai kebutuhan.
tabel berikut ini berisi well-known port.
dicadangkan, tidak digunakan.
tcp port service multiplexer
remote job entry
active users; alias = users
belum ditetapkan (sebelumnya: netstat)
quote of the day; alias = quote
message send protocol
character generator; alias = ttytst source
file transfer protocol (default data)
file transfer protocol (control), connection dialog
any private mail system
simple mail transfer protocol; alias = mail
nsw user system fe
display support protocol
any private printer server
time; alias = timeserver
resource location protocol; alias = resource
host name server; alias = nameserver
who is; alias = nicname
mpm flags protocol
message processing module
mpm (default send)
login host protocol
remote mail checking protocol
imp logical address maintenance
xns time protocol
domain name system server
isi graphics language
any private terminal access
any private file service
via systems  ftp
communications integrator (ci)
dhcp/bootp protocol server
dhcp/bootp protocol server
trivial file transfer protocol
remote job service
remote job service
remote job service
remote job service
any private dial-out service
any private rje service
world wide web http
hosts2 name server
mit ml device
common trace facility
mit ml device
micro focus cobol
any private terminal link; alias = ttylink
su/mit telnet gateway
dnsix security attribute token map
mit dover spooler
network printing protocol
device control protocol
tivoli object dispatcher
dixie protocol specification
swift remote virtual file protocol
nic host name server; alias = hostname
genesis point-to-point trans net; alias = webster
acr-nema digital imag. &
mailbox name nameserver
remote telnet service
sna gateway access server
post office protocol version 2 (pop2); alias = postoffice
post office protocol version 3 (pop3); alias = postoffice
sun remote procedure call
mcidas data transmission protocol
authentication service; alias = authentication
audio news multicast
simple file transfer protocol
ansa rex notify
uucp path service
network news transfer protocol (nntp); alias = usenet
encore expedited remote procedure call
network time protocol; alias = ntpd ntp
ansa rex trader
locus pc-interface net map server
unisys unitary login
locus pc-interface connection server
gss x license verification
password generator protocol
profile naming system
netbios name service
netbios datagram service
netbios session service
emfis data service
emfis control service
interim mail access protocol v2
news; alias = news
aed 512 emulation service
background file transfer program
sgmp; alias = sgmp
knet/vm command/message protocol
pcmail server; alias = repository
simple network management protocol
network innovations multiplex
network innovations cl/1
x display manager control protocol
nextstep window server
border gateway protocol (bgp)
unisys audit sitp
application communication interface
plus fives mumps
queued file transport
gateway access control protocol
osu network monitoring system
spider remote monitoring protocol
internet relay chat (irc) protocol
dnsix network level module audit
dnsix session management module audit redirector
directory location service
directory location service monitor
ibm system resource controller
appletalk routing maintenance
appletalk name binding
appletalk zone information
trivial authenticated mail protocol
texas instruments 914c/g terminal
internetwork packet exchange (ipx)
access technology license server
netix message posting protocol
interactive mail access protocol versi 3
berkeley rlogind with spx authentication
berkeley rshd with spx authentication
certificate distribution center
tidak digunakan; dicadangkan
display systems protocol
tidak digunakan; dicadangkan
perf analysis workbench
unofficial assignments, known security risks, trojans and applications use.
protocol and security warnings including related ports.
protocol and security warnings including related ports.