Most popular variants of the header value (we only show this when there's just a bunch of variants):

Network Error Logging (NEL) defines a mechanism enabling web applications to declare a reporting policy that can be used by an user agent to report network errors for a given origin.

Reference...

We have seen 261 websites setting the NEL HTTP header and 36 unique values of this header.

  • www.bbc.co.uk {"report_to":"default","max_age":600,"include_subdomains":true,"failure_fraction":0.01}
  • www.bbc.com {"report_to":"default","max_age":2592000,"include_subdomains":true,"failure_fraction":0.01}
  • www.linkedin.com {"report_to":"network-errors","max_age":1296000,"success_fraction":0.00066,"failure_fraction":1,"include_subdomains":true}
  • www.bing.com {"report_to":"network-errors","max_age":604800,"success_fraction":0.001,"failure_fraction":1.0}
  • cdn.shopify.com {"report_to":"network-errors","max_age":0}
  • scotthelme.co.uk {"report_to":"default","max_age":10886400}
  • webcookies.org {"report_to": "nel", "max_age": 10886400}
  • www.heliosnet.com {"report_to":"default","max_age":31536000,"include_subdomains":true}
  • platform.linkedin.com {"report_to":"network-errors","max_age":1296000,"success_fraction":0.00066,"failure_fraction":1,"include_subdomains":true}
  • an.yandex.ru {"report_to": "network-errors", "max_age": 86400, "success_fraction": 0.001, "failure_fraction": 0.1}
  • www.chaturbate.com {"report_to":"default","max_age":2592000,"include_subdomains":true}
  • static1.dmcdn.net {"report_to":"telemetry","max_age":7776000,"include_subdomains":true,"failure_fraction":1.0}
  • s2.dmcdn.net {"report_to":"telemetry","max_age":7776000,"include_subdomains":true,"failure_fraction":1.0}
  • s1.dmcdn.net {"report_to":"telemetry","max_age":7776000,"include_subdomains":true,"failure_fraction":1.0}
  • bbc.com {'report_to':'default','max_age': 86400,'include_subdomains':true,'failure_fraction':0.5}
  • api.dmcdn.net {"report_to":"telemetry","max_age":7776000,"include_subdomains":true,"failure_fraction":1.0}
  • www.booking.com {"max_age":600,"report_to":"default"}
  • emp.bbci.co.uk {"report_to":"default","max_age": 604800,"include_subdomains":true,"failure_fraction":0.01}
  • yastatic.net {"report_to": "network-errors", "max_age": 31536000, "success_fraction": 0.01}
  • www.investopedia.com {"report_to":"network-errors","max_age":2592000,"success_fraction":0,"failure_fraction":1.0, "include_subdomains": true}
  • dc.ads.linkedin.com {"report_to":"network-errors","max_age":1296000,"success_fraction":0.00066,"failure_fraction":1,"include_subdomains":true}
  • chaturbate.com {"report_to":"default","max_age":2592000,"include_subdomains":true}
  • homepage.files.bbci.co.uk {"report_to":"default","max_age": 604800,"include_subdomains":true,"failure_fraction":0.01}
  • nav.files.bbci.co.uk {"report_to":"default","max_age": 604800,"include_subdomains":true,"failure_fraction":0.01}
  • mybbc.files.bbci.co.uk {"report_to":"default","max_age": 604800,"include_subdomains":true,"failure_fraction":0.01}
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