VPC
6 posts
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What a NAT Gateway actually costs (2026)
The two meters a NAT Gateway bills, why one zonal gateway across three AZs costs more, and what regional mode changed in 2025.
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VPC endpoint cost: gateway vs interface (2026)
VPC gateway endpoints for S3 and DynamoDB carry no charge. Three documented ways one silently stops covering your traffic.
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What VPC Flow Logs actually cost (2026)
VPC Flow Logs bill the tiered Vended Logs meter. The aggregation interval AWS overrides on Nitro, and records you pay for twice.
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Elastic IP and public IPv4 pricing (2026)
A public IPv4 is $0.005 an hour, and idle addresses cost exactly the same as in-use ones. Plus AWS's formula for whether a NAT Gateway is cheaper.
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What cross-AZ data transfer costs (2026)
Cross-AZ transfer is $0.01 per GB each direction, so $0.02 a round trip. What is free, what a public IP costs, and the usage type that changed in 2025.
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Transit Gateway pricing and costs (2026)
Transit Gateway attachment hours land on the VPC owner, not the gateway owner, and three types bill three different accounts.