Amazon EC2 instance IP addressing

Publisher

Amazon Web Services

URL

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-instance-addressing.html

Published

unknown

Updated

unknown

Accessed

2026-10-14

HTTP status

200

License

AWS documentation; Creative Commons Attribution-ShareAlike 4.0 for docs text per AWS site terms (not re-verified); no-redistribution; short excerpts and locators only

Source notes citing this source

• AWS releases an instance's auto-assigned public IPv4 address when the instance is stopped, hibernated or terminated, and assigns a new one on start. in context
• AWS directs customers who need a persistent public IP address that can be moved between instances to use an Elastic IP address. in context
• By default AWS does not assign a public IP address to instances launched into a nondefault subnet. in context
• AWS charges for all public IPv4 addresses, including those associated with running instances and Elastic IP addresses. in context
• Secondary private IPv4 addresses on EC2 can be reassigned from one instance to another, and AWS cites redirecting traffic to a standby instance as a use case. in context
• EC2 security groups attach to network interfaces, not individual IP addresses, so every IP on an interface is subject to that interface's security groups. in context
• Auto-assigned AWS public IPs and Azure default outbound IPs are unsuitable as SBC signaling addresses that carriers or Microsoft must reach, so a cloud SBC should use an Elastic IP or a Standard static public IP. inferred in context

Cite this source record

APA

WarmTransfer. (2026, October 14). Amazon EC2 instance IP addressing. WarmTransfer. https://warmtransfer.net/knowledge/sources/aws-ec2-instance-addressing

BibTeX

@misc{warmtransfer-aws-ec2-instance-addressing,
  title  = {Amazon EC2 instance IP addressing},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/aws-ec2-instance-addressing},
  note   = {Amazon Web Services, accessed 2026-10-14}
}