NEL

HTTP response header

Header usage statistics

NEL response header information and usage statistics.
Websites using header NEL5,867,065
Percentage of websites that use NEL header7.16%
Total discovered header values416
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country United States

NEL Directives

NEL directives value information and usage statistics
DirectiveShareWebsites countUnique Values

NEL header usage distribution by website rank



Geographical Distribution

Header usage distribution by websites across the globe.



Websites utilizing NEL

List of websites that use NEL header
DomainCountryRankContacts
hugedomains.com United States14
www.hugedomains.com United States14
m.facebook.com United States16
www.linkedin.com United States19
cdnjs.cloudflare.com United States20
cloudflare.com United States27
See full domain list

Common header values

List of top common NEL header values
Header valueValue prevalence
{"success_fraction":0,"report_to":"cf-nel","max_age":604800}81.07%
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}16.76%
{"report_to":"heroku-nel","max_age":3600,"success_fraction":0.005,"failure_fraction":0.05,"response_headers":["Via"]}1.53%
{ "report_to": "nel-endpoint-freshdesk", "max_age": 2592000, "include_subdomains": true}0.13%
{"failure_fraction": 0.001, "include_subdomains": true, "max_age": 600, "report_to": "endpoint-1"}0.09%
{ "report_to": "wm_nel", "max_age": 604800, "failure_fraction": 0.05, "success_fraction": 0.0}0.06%
{"report_to":"default","max_age":31557600,"include_subdomains":true,"success_fraction":0.005}0.05%
{"report_to":"default","max_age":31536000,"include_subdomains":true}0.04%
{"report_to":"default","max_age":31557600,"include_subdomains":true,"success_fraction":0.005"}0.04%
{"success_fraction":0,"report_to":"nel","max_age":3600}0.03%
{"report_to":"nel","max_age":604800,"include_subdomains":true,"failure_fraction":0.01}0.02%
{"report_to": "w3-reporting-nel", "max_age": 14400, "include_subdomains": false, "success_fraction": 1.0, "failure_fraction": 1.0}0.02%
{ "report_to": "nel-endpoint-freshworks360", "max_age": 2592000, "include_subdomains": true}0.02%
{"report_to":"network-errors","max_age":86400,"success_fraction":0.001,"failure_fraction":1.0}0.02%
{"report_to":"default","max_age":2592000,"include_subdomains":true,"failure_fraction":1.0}0.01%
{"report_to":"network-errors","max_age":86400,"success_fraction":0.2,"failure_fraction":1.0}0.01%
{ "report_to": "nel-endpoint-freshservice", "max_age": 2592000, "include_subdomains": true}0.01%
{"report_to":"default","max_age":31557600,"include_subdomains":true,"success_fraction":0.2}0.01%
{"report_to":"default","max_age":604800,"include_subdomains":true}0.01%
{ "report_to": "nel-endpoint-freshstatus", "max_age": 2592000, "include_subdomains": true}0.00%