Region Header
REMOTE_IDENT =
REMOTE_USER = APEX_PUBLIC_USER
Host = apex.oracle.com:443
Connection = close
X-Real-IP = 23.44.170.10
X-Forwarded-For = 216.73.216.12, 23.200.85.10, 23.44.170.10
X-Forwarded-Proto = https
X-Forwarded-Port = 443
X-Forwarded-Host = apex.oracle.com:443
Accept = */*
User-Agent = Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Referer = https://apex.oracle.com/pls/apex/f?p=69520
True-Client-IP = 216.73.216.12
Pragma = no-cache
X-EdgeConnect-Session-Id = 1fb93f17686346cc23edc435
CDN-Loop = akamai;v=1.0;c=1
X-Akamai-CONFIG-LOG-DETAIL = true
Accept-Encoding = gzip
Akamai-Origin-Hop = 2
Via = 1.1 v1-akamaitech.net(ghost) (AkamaiGHost), 1.1 akamai.net(ghost) (AkamaiGHost)
Cache-Control = no-cache, max-age=0
ORDS_VERSION = 25.1.0.r1001652
APEX_LISTENER_VERSION = 25.1.0.r1001652
DAD_NAME =
DOC_ACCESS_PATH =
DOCUMENT_TABLE =
GATEWAY_IVERSION = 3
GATEWAY_INTERFACE = CGI/1.1
HTTP_ACCEPT = */*
HTTP_ACCEPT_ENCODING = gzip
HTTP_ACCEPT_LANGUAGE =
HTTP_ACCEPT_CHARSET =
HTTP_IF_MODIFIED_SINCE =
HTTP_IF_NONE_MATCH =
HTTP_HOST = apex.oracle.com
HTTP_ORACLE_ECID =
HTTP_PORT = 443
HTTP_REFERER = https://apex.oracle.com/pls/apex/f?p=69520
HTTP_USER_AGENT = Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
PATH_ALIAS =
PATH_INFO = /f
PLSQL_GATEWAY = WebDb
QUERY_STRING = p=69520:1::::::
REMOTE_ADDR = 216.73.216.12
REQUEST_CHARSET = AL32UTF8
REQUEST_CONTEXT_PATH = /pls/apex
REQUEST_CONTEXT_ROOT = /pls/apex
REQUEST_IANA_CHARSET = UTF-8
REQUEST_METHOD = GET
REQUEST_PROTOCOL = https
REQUEST_SCHEME = https
SCRIPT_NAME = /pls/apex
SCRIPT_PREFIX =
SERVER_NAME = apex.oracle.com
SERVER_PORT = 443
SERVER_PROTOCOL = HTTP/1.1
SERVER_SOFTWARE = Mod-Apex
WEB_AUTHENT_PREFIX =
HTTP_COOKIE =
Region Footer

As you can tell from the URL, the page is developed in Oracle's Apex product and hosted on the free Oracle Apex site. The site terms forbid hosting production data, but the site is a great resource for Oracle developers: apex.oracle.com

The Browser Identification region is a basic APEX HTML region, with one APEX item. The browser string is read by the SQL expression:

SELECT OWA_UTIL.GET_CGI_ENV('HTTP_USER_AGENT')
FROM DUAL;

There's a lot more information in the CGI environment, and the PRINT_CGI_ENV procedure in the OWA_UTIL package will dump everything. The next region, CGI Environment Strings, is an Oracle PL/SQL region. The PL/SQL code in this region is a simple anonymous block:

begin
   owa_util.print_cgi_env;
end;

Read more about the OWA_UTIL package.