Find Containing CIDR

Enter an IP address (e.g., 18.234.32.147 or 2600:1f18:247c:b100::1) or a CIDR block (e.g., 13.52.5.0/26) to find the most specific matching range in the list below.

Filters

Regions

Recommended: Leave unchecked. Do not select any option.

Atlassian's products are delivered from a global network. Selecting only specific regions may result in degraded performance or service availability.

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Products

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IP Version

Recommended: Leave both checked.

Select the IP version(s) you need. We recommend leaving both options checked.

Direction

Egress (most popular option): Connections from Atlassian to remote servers, e.g. Webhooks, Email Servers, Application links to on-premises servers, etc.

Ingress (rarely chosen, Not recommended): Connections from Browsers and API Clients to Atlassian. Rarely restricted by firewalls.

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Direction Matching Mode:

Choose exclusive if you don't want summary ranges, and want only ranges used for that specific traffic direction.

We recommend using inclusive ranges as they will be more future-proof.

Perimeter (Select One)

Default is "commercial". Only select "fedramp" if your product is part of the FedRAMP program.

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Summarize Results

Recommended: Yes (Checked)

If checked, CIDR ranges that are fully contained within a larger range in the results will be hidden. Uncheck to see all individual matching ranges.

Filtered CIDRs (0)

Raw CIDR List (for copying)