Trustwave Port Search - TCP / UDP Port Lookup Tool

Find which applications may be opening ports on your computer

Search For A Port By Port Number Search For A Port By Port Number
Type in a port number below from 0 to 65535 and find out what applications commonly use that port.

Search For A Port By Application Name Search For A Port By Application Name
Type in an application name below to find out which ports it may use.

View A Port Range View A Port Range
To view a list of ports, click on any of the following intervals:
0-499 500-999 1000-1499
1500-1999 2000-2499 2500-2999
3000-3499 3500-3999 4000-4499
4500-4999 5000-5499 5500-5999
6000-6499 6500-6999 7000-7499
7500-7999 8000-8499 8500-8999
9000-9499 9500-9999 10000-10499
10500-10999 11000-11499 11500-11999
12000-12499 12500-12999 13000-13499
13500-13999 14000-14499 14500-14999
15000-15499 15500-15999 16000-16499
16500-16999 17000-17499 17500-17999
18000-18499 18500-18999 19000-19499
19500-19999 20000-20499 20500-20999
21000-21499 21500-21999 22000-22499
22500-22999 23000-23499 23500-23999
24000-24499 24500-24999 25000-25499
25500-25999 26000-26499 26500-26999
27000-27499 27500-27999 28000-28499
28500-28999 29000-29499 29500-29999
30000-30499 30500-30999 31000-31499
31500-31999 32000-32499 32500-32999
33000-33499 33500-33999 34000-34499
34500-34999 35000-35499 35500-35999
36000-36499 36500-36999 37000-37499
37500-37999 38000-38499 38500-38999
39000-39499 39500-39999 40000-40499
40500-40999 41000-41499 41500-41999
42000-42499 42500-42999 43000-43499
43500-43999 44000-44499 44500-44999
45000-45499 45500-45999 46000-46499
46500-46999 47000-47499 47500-47999
48000-48499 48500-48999 49000-49499
49500-49999 50000-50499 50500-50999
51000-51499 51500-51999 52000-52499
52500-52999 53000-53499 53500-53999
54000-54499 54500-54999 55000-55499
55500-55999 56000-56499 56500-56999
57000-57499 57500-57999 58000-58499
58500-58999 59000-59499 59500-59999
60000-60499 60500-60999 61000-61499
61500-61999 62000-62499 62500-62999
63000-63499 63500-63999 64000-64499
64500-64999 65000-65499 65500-65535
These items matched the port/ports that you specified:
Possible trojans are marked in red
Port Application Protocol
500 isakmp tcp/udp
500 Cisco Systems udp
501 STMF tcp/udp
502 asa-appl-proto tcp/udp
503 Intrinsa tcp/udp
504 citadel tcp/udp
505 mailbox-lm tcp/udp
506 ohimsrv tcp/udp
507 crs tcp/udp
508 xvttp tcp/udp
509 snare tcp/udp
510 FirstClass Protocol tcp/udp
511 Part of rootkit t0rn, a program called "leeto's socket daemon" runs at this port. tcp
511 PassGo tcp/udp
512 remote process execution; authentication performed using passwords and UNIX login names tcp
512 used by mail system to notify users of new mail received; currently receives messages only from processes on the same machine udp
513 Grlogin tcp
513 remote login a la telnet; automatic authentication performed based on priviledged port numbers and distributed data bases which identify "authentication domains" tcp
513 maintains data bases showing who's logged in to machines on a local net and the load average of the machine udp
514 RPC Backdoor tcp
514 cmd like exec, but automatic authentication is performed as for login server tcp
515 spooler tcp/udp
516 videotex tcp/udp
517 like tenex link, but across machine - unfortunately, doesn't use link protocol (this is actually just a rendezvous port from which a tcp connection is established) tcp/udp
519 unixtime tcp/udp
520 extended file name server tcp
520 local routing process (on site); uses variant of Xerox NS routing information protocol - RIP udp
521 ripng tcp/udp
522 ULP tcp/udp
523 IBM-DB2 tcp/udp
524 NCP tcp/udp
525 timeserver tcp/udp
526 newdate tcp/udp
527 Stock IXChange tcp/udp
528 Customer IXChange tcp/udp
529 IRC-SERV tcp/udp
530 rpc tcp/udp
531 Net666 tcp
531 Rasmin tcp
531 chat tcp/udp
532 readnews tcp/udp
533 for emergency broadcasts tcp/udp
534 MegaMedia Admin tcp/udp
535 iiop tcp/udp
536 opalis-rdv tcp/udp
537 Networked Media Streaming Protocol tcp/udp
538 gdomap tcp/udp
539 Apertus Technologies Load Determination tcp/udp
540 uucpd tcp/udp
541 uucp-rlogin tcp/udp
542 commerce tcp/udp
544 krcmd tcp/udp
545 appleqtcsrvr tcp/udp
546 DHCPv6 Client tcp/udp
547 DHCPv6 Server tcp/udp
548 AFP over TCP tcp/udp
549 IDFP tcp/udp
550 new-who tcp/udp
551 cybercash tcp/udp
552 DeviceShare tcp/udp
553 pirp tcp/udp
554 Real Time Stream Control Protocol tcp/udp
555 711 trojan (Seven Eleven) tcp/udp
555 Ini-Killer tcp/udp
555 Net Administrator tcp/udp
555 Phase Zero tcp/udp
555 Phase-0 tcp/udp
555 Stealth Spy tcp/udp
555 Trojan: phAse Zero tcp/udp
556 rfs server tcp/udp
557 openvms-sysipc tcp/udp
558 SDNSKMP tcp/udp
559 Domwis tcp
559 Solufina tcp
559 TEEDTAP tcp/udp
560 rmonitord tcp/udp
562 chcmd tcp/udp
563 nntp protocol over TLS/SSL (was snntp) tcp/udp
564 plan 9 file service tcp/udp
565 whoami tcp/udp
566 streettalk tcp/udp
567 banyan-rpc tcp/udp
568 microsoft shuttle tcp/udp
569 microsoft rome tcp/udp
570 demon tcp/udp
571 udemon tcp/udp
572 sonar tcp/udp
573 banyan-vip tcp/udp
574 FTP Software Agent System tcp/udp
575 VEMMI tcp/udp
576 ipcd tcp/udp
577 vnas tcp/udp
578 ipdd tcp/udp
579 decbsrv tcp/udp
580 SNTP HEARTBEAT tcp/udp
581 Bundle Discovery Protocol tcp/udp
582 SCC Security tcp/udp
583 Philips Video-Conferencing tcp/udp
584 Key Server