Distance between Azure Zones

Question

Distance between Azure Zones

Guillaume V 20

Hello,

AWS is clear and provide the minimum distance between 2 zones "although all are within 100 km (60 miles) of each other.": https://aws.amazon.com/about-aws/global-infrastructure/regions_az/

Regarding Azure, I couldn't find the any information about it. How to advise clients when they are multi-cloud ?

Regards

Firman Yuriansyah 0 Reputation points Microsoft Employee

2025-10-20T08:41:36.7233333+00:00

This URLs specifics response to your question:
https://learn.microsoft.com/en-us/azure/reliability/availability-zones-overview?tabs=azure-cli

Availability zones are typically separated by several kilometers, and usually are within 100 kilometers. This distance means they're close enough to have low-latency connections to other availability zones through a high-performance network.

Answer accepted by question author

1 additional answer

Your answer

Firman Yuriansyah 0 Reputation points Microsoft Employee

2025-10-20T08:41:36.7233333+00:00

This URLs specifics response to your question:
https://learn.microsoft.com/en-us/azure/reliability/availability-zones-overview?tabs=azure-cli

Availability zones are typically separated by several kilometers, and usually are within 100 kilometers. This distance means they're close enough to have low-latency connections to other availability zones through a high-performance network.

Answer 1

Hi, Welcome to Microsoft Q&A community forum!
Many Azure regions provide availability zones, which are separated groups of datacenters within a region. Availability zones are close enough to have low-latency connections to other availability zones. They're connected by a high-performance network with a round-trip latency of less than 2ms. However, availability zones are far enough apart to reduce the likelihood that more than one will be affected by local outages or weather
But the actual distance between datacenters in availability zones is not defined and may vary. MS does not provide this type of information, but guarantees that a problem with one of the datacenters will not affect the other datacenters in the availability zone. If you have stringent parameters, you can consider using a different region for your disaster recovery
Azure strives to ensure a minimum distance of 300 miles (483 kilometers) between datacenters in enabled regions, although it isn't possible across all geographies.
ref link:
https://learn.microsoft.com/en-us/azure/reliability/cross-region-replication-azure Hope this helps
Cheers
Luca
Please "Accept as Answer" and Upvote if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues

Mazda Naqvy 20 Reputation points

2024-05-12T20:17:41.4133333+00:00

Thanks

Answer 2

Vahid Ghafarpour 23,600

Thanks for posting your question in the Microsoft Q&A forum. Azure strives to ensure a minimum distance of 300 miles (483 kilometres) between data centers in enabled regions. https://learn.microsoft.com/en-us/azure/reliability/cross-region-replication-azure ** Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful **

Steve Bates 0 Reputation points

2025-07-30T16:30:42.35+00:00

NB Availability Zones are Independant Datacenters that are close to each other, but with independent cooling power etc.

If you need to have copies of data further away you need to use a paired region that is in the paired region. Here is a list of the paired Regions.
https://learn.microsoft.com/en-us/azure/reliability/regions-list

For example a storage account that uses RA-GRS will be coping to the paired region.
eg for RA-GRS in UK I have Primary: UK South, Secondary: UK West. The distabce between UK South (London ) and UK West is 149 miles.

For a storage account that uses Locally-redundant storage (LRS), the location is only stated with a single location. For this the secondary copy is nearby but highly available.
I'd expect this to be less than 2 miles.

Share via

Distance between Azure Zones

1 additional answer

Your answer