Cloudflare error 1005 concerns a blocked autonomous system number, or ASN, associated with a request’s network. The scope can be broader than one IP address. Locate the failed event and compare the network-level rule with the visitor or integration’s intended workflow before choosing an adjustment.
Guide reviewed: October 8, 2026. Interface labels may vary by version, account and device.
Confirm the ASN and affected network
| Check | Evidence | Reason |
|---|---|---|
| Failed request | Screenshot, time and Ray ID | Locate the actual event |
| Observed ASN | Network context in that event | Avoid relying on an unrelated lookup |
| Blocking policy | Rule purpose and scope | Understand who else an adjustment affects |
| Recovery | Original client and environment | Owner’s home connection does not test that ASN |
Why an ASN block can affect legitimate visitors
A network rule is broader than a decision about a single person. Its purpose might be to address unwanted traffic associated with a provider, but a reader or customer can still use that provider for an ordinary visit. The owner needs to review the request rather than assume that every affected visitor has the same intent.
For example, an integration hosted by a provider might share the network covered by a broad block. A successful test from the owner’s home connection would not verify that integration’s access. The two requests arrive through different environments.
Keep the distinction between an individual IP and a network ASN clear in the investigation. Adding an address-specific adjustment without understanding the broader policy can leave confusing or inconsistent behavior.
Collect the report and locate the event
Match the time zone. Keep the screenshot time with its UTC or local context and search the appropriate dashboard window using Ray ID or the reported client address. Use the ASN shown for that event to investigate what was blocked.
Visitors can send the owner a screenshot showing error 1005, the affected page address, and the approximate time. A Ray ID is particularly useful when present. If the owner needs the public IP address, share it privately through the support conversation.
Cloudflare recommends that owners search Security Events using the Ray ID or client IP. Its documentation also notes the need to account for the error timestamp’s time zone when searching the event history.
Review the relevant request and rule, including the ASN reported for that event. An ASN copied from an unrelated lookup or an earlier request is not enough to establish what happened at the time of the block.
Review the scope before changing the policy
Describe the legitimate workflow and the original reason for the network-level restriction. A trusted integration using one provider does not alone justify allowing every request from that provider network. Have its maintainer and the site administrator review a supported access arrangement and document the scope.
Find the configuration that denies the network and document why it was introduced. Compare that purpose with the legitimate workflow now being reported. The question may be a false match, an intentional restriction, or an access policy that no longer fits the site’s audience.
Cloudflare’s support page directs owners to assess the block and the ASN allowance under IP Access Rules. Before making a change, the administrator should understand how broadly it applies and what protection remains for the requests involved.
For a trusted integration, discuss a supported and appropriately scoped arrangement with its maintainer. Allowing an entire provider network solely because one integration needs access may have a larger effect than intended.
Keep the original configuration and the reason for any adjustment. If a temporary exception is introduced, record its expected duration or review point. That is easier to manage than an unexplained allowance that remains after the original workflow changes.
Retest from the affected environment
Use the client and page that originally failed, then confirm the intended response. A successful request from another network is supporting evidence, but it does not exercise the ASN decision behind the report.
If the failure involved an automated integration, ask its maintainer to perform a harmless test of the actual endpoint. Opening the homepage in a browser is not a substitute for the integration’s request.
Keep the test time so the administrator can compare the result with current request evidence. If the request remains blocked, recheck the active rule and observed network rather than adding a sequence of broad exceptions.
For a visitor awaiting review, explain the policy through the site’s own support channel. Cloudflare’s network provides the mechanism, but the owner is responsible for the site’s chosen access decision.
The final note should identify the network-level rule, the reviewed workflow, and the reason for the decision. That helps future administrators assess similar reports consistently without treating an ASN as a description of an individual visitor.
Reference: Cloudflare error 1005 documentation.
Record the reviewed ASN policy and result
Retest the original page or integration endpoint from the affected environment using harmless data. Record the request time and compare the new evidence with the policy. Preserve the final network rule and rationale so future access reports can be reviewed consistently.