ERR_ICANN_NAME_COLLISION -166

Net error -166

BROWSER

Resolving a hostname to an IP address list included the IPv4 address "127.0.53.53".

Browser error page with a network error code and a checklist of likely causes
Browser network errors: rule out your connection first, then the site.

What it means

ERR_ICANN_NAME_COLLISION is a Browser error code reported by Google Chrome, Microsoft Edge and other Chromium browsers. Its official message is: “Resolving a hostname to an IP address list included the IPv4 address "127.0.53.53".”

How to fix ERR_ICANN_NAME_COLLISION

  1. Reload the page once — single transient failures heal themselves immediately
  2. Flush DNS: 'ipconfig /flushdns' on Windows, 'dscacheutil -flushcache' on macOS
  3. Disable VPN, proxy settings and your antivirus web shield, then retry
  4. Test the same page from mobile data or another device to isolate YOUR setup from the site
  5. Bypass performance extensions: open a private window, disable ad-blockers and retry

Related errors

ERR_SSL_SERVER_CERT_BAD_FORMATERR_SSL_CLIENT_AUTH_CERT_BAD_FORMATERR_CT_STH_PARSING_FAILEDERR_CERT_COMMON_NAME_INVALIDERR_CERT_DATE_INVALIDERR_CERT_AUTHORITY_INVALIDERR_CERT_REVOKEDERR_UNKNOWN_URL_SCHEME

Source: Chromium net_error_list.h

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