port number table TCP – IP Ports list | These are numbers used by certain protocols of application layer. Each common protocols are allocated a unique ports . IANA is responsible for assignment of port numbers. Custom ports are also allocated to vendors by the regulatory authorities. Here are the list of important TCP -IP ports commonly used
FTP ———— 20,21
TelNet ———- 23
SMTP ———- 25
DNS ———– 53
TFTP ———– 69
SNMP ———- 161
RIP ————- 520
IMAP 4——— 143
IMAP 3 ——— 220
RPC ———— 135
LDAP ———- 389
Net Stat ——– 15
WINS ———- 42
BootP ———- 67
DHCP ———- 68
POP2 ———- 109
POP3 ———- 110
Net BIOS —— 139
SSL(HTTPS) — 443
SQL Server —- 1433
NFS ———— 2049
SSH ———— 22
RAP ———– 38
BGP ———– 179