HTTP response header

This header is optional. The X-FEServer header contains the name of the server(s) that routed the request

Header usage statistics

X-FEServer response header information and usage statistics.

Websites using header X-FEServer 21,369
Percentage of websites that use X-FEServer header <0.1%
Total discovered header values 10,001
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Connected technologies

Technologies that utilize the header

Outlook Web App, category Web Mail, total 24,466 websites

Distribution by websites popularity

X-FEServer detection in the top websites by popularity

Top 10k sites 5 websites
Top 100k sites 11 websites
Top 1m sites 140 websites

Websites utilizing X-FEServer

List of websites that use X-FEServer header

Domain Country Rank Contacts
outlook.live.com United States of America 1,610
outlook.office365.com United States of America 1,859
outlook.com United States of America 3,440
www.outlook.com United States of America 3,440
outlook.office.com United States of America 4,336
ne.de Germany 29,954
See full domain list
Flat price per the report, subscription is not required.

Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-FEServer header values

Header value Value prevalence
MAIL 2.59%
EX01 0.72%
EXCHANGE2016 0.61%
EX1 0.50%
EX2016 0.45%
EXCH01 0.40%
MAIL2 0.39%
EXCHANGE01 0.39%
EXCHANGE2019 0.32%
MAIL01 0.32%
EXCH2016 0.32%
EXCH 0.30%
MAIL1 0.29%
EXCHANGE2013 0.26%
EX 0.25%
EXCH02 0.24%
EX02 0.24%