Ensure
Number & Math

Random Port Generator

Draw random TCP port numbers from a range while skipping ports that known services already use.
max 100

Ports drawn

0

Drawn from

49152 - 65535

Ports available

16,384

Well known ports

These ports are left out of every draw.

PortService
20ftp-data
21ftp
22ssh
23telnet
25smtp
53dns
67dhcp
69tftp
80http
110pop3
123ntp
135msrpc
139netbios-ssn
143imap
161snmp
389ldap
443https
445smb
465smtps
514syslog
587smtp submission
636ldaps
993imaps
995pop3s
1433mssql
1521oracle
3306mysql
3389rdp
5432postgres
5672amqp
5900vnc
6379redis
8080http-alt
8443https-alt
9200elasticsearch
11211memcached
27017mongodb

Guides that cover this

Number bases, byte sizes and the units people argue aboutHow hex maps onto bits, why a 1 TB drive shows as 931 GB, what 0.1 plus 0.2 actually equals, and how rounding, percentages and locale formatting quietly change a number.

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