Domain technical report
Kotlin Programming Language
kotlinlang.org
Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build backend, mobile, web, and desktop applications efficiently.
IPv44
IPv60
MX5
NS4
Analyze any domain
Get a complete DNS, email, SSL, HTTP and network analysis in seconds.
79
Total
65
DNS
90
Email
73
Security
65
Network
100
Availability
Domainkotlinlang.org
IPv44
IPv60
MX records5
StatusActive
DiagnosticsMain findings and recommendations
IPv4 (A)30 / 30 pts · Dns
4 IPv4 address(es) detected.
IPv6 (AAAA)0 / 10 pts · Dns
0 IPv6 address(es) detected.
Name server redundancy20 / 20 pts · Dns
4 NS record(s); 2 or more required.
SOA record10 / 10 pts · Dns
Authoritative zone record.
DNSSEC chain0 / 15 pts · Dns
Both DS and DNSKEY are required.
CAA policy5 / 5 pts · Dns
Certificate authority restriction.
DNS propagation0 / 10 pts · Dns
Agreement between public resolvers.
MX records20 / 20 pts · Mail
5 MX record(s).
SPF25 / 25 pts · Mail
SPF policy published.
DMARC25 / 25 pts · Mail
DMARC policy published.
DKIM20 / 20 pts · Mail
A DKIM selector was verified.
MTA-STS0 / 5 pts · Mail
Mail transport policy.
TLS-RPT0 / 5 pts · Mail
TLS reporting policy.
Valid TLS certificate55 / 55 pts · Security
194 day(s) remaining.
Certificate lifetime10 / 10 pts · Security
Full points require at least 30 days remaining.
HTTP security headers8 / 35 pts · Security
2 of 9 evaluated headers detected.
PTR reverse DNS30 / 30 pts · Network
PTR: server-54-192-100-72.mci50.r.cloudfront.net
IPv4 diversity35 / 35 pts · Network
Two or more IPv4 addresses receive full points.
IPv6 connectivity0 / 35 pts · Network
AAAA availability.
DNS resolution40 / 40 pts · Availability
At least one address family must resolve.
HTTP response40 / 40 pts · Availability
HTTP/2 200
HTTPS final URL20 / 20 pts · Availability
Final URL uses HTTPS.
DNS and emailPublished records and email configuration
A
4 record(s)54.192.100.72 54.192.100.79 54.192.100.96 54.192.100.83
AAAA
0 record(s)—
Not configured
CNAME
0 record(s)—
Not configured
MX
5 record(s)5 alt1.aspmx.l.google.com. 10 alt3.aspmx.l.google.com. 1 aspmx.l.google.com. 5 alt2.aspmx.l.google.com. 10 alt4.aspmx.l.google.com.
TXT
3 record(s)"facebook-domain-verification=fz49z7zr0ycqj7f9qvli45x3wqzfrh" "google-site-verification=Kldj7OgchCyGYVHwynlh6tOmYdmPHPVno2VxUNeW0TI" "v=spf1 include:_spf.google.com a:mkto-mailer.jetbrains.com -all"
NS
4 record(s)ns-163.awsdns-20.com. ns-1638.awsdns-12.co.uk. ns-953.awsdns-55.net. ns-1287.awsdns-32.org.
SOA
1 record(s)ns-1638.awsdns-12.co.uk. awsdns-hostmaster.amazon.com. 2019052201 7200 900 2019072901 86400
CAA
4 record(s)0 iodef "mailto:caa-iodef@jetbrains.com" 0 issue "letsencrypt.org" 0 issuewild ";" 0 issue "amazon.com"
DS
0 record(s)—
Not configured
DNSKEY
0 record(s)—
Not configured
RRSIG
0 record(s)—
Not configured
NSEC
0 record(s)—
Not configured
NSEC3
0 record(s)—
Not configured
SRV
0 record(s)—
Not configured
NAPTR
0 record(s)—
Not configured
TLSA
0 record(s)—
Not configured
SSHFP
0 record(s)—
Not configured
SPF
Configuredv=spf1 include:_spf.google.com a:mkto-mailer.jetbrains.com -all
DMARC
Configuredv=DMARC1; p=reject; adkim=s; aspf=s;
DKIM
Selector googlev=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvCB6RR8mwRD42m0Hdg07a4NJrWuVF3tcyo+sCeC27QO1VMiACu14JUzu6zDP6TK9HroceQrZgL5sF0XyLc56c2ShgODraDQBc2g0N9XVUjbruSPdVJb98zxaJ2JasFtL3mELxkUOzEuRC2ujA4BwUnsUl2lnYVJ3wuM8LoZM2PQIDAQAB
Analyzed webpageMetadata and HTTP response
Title and description
ExtractedTitle
Kotlin Programming Language
Description
Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build backend, mobile, web, and desktop applications efficiently.
Final URL
https://kotlinlang.org/
HTTP status
206
HTTP
Status
HTTP/2 200
Final URL
https://kotlinlang.org/
Version
3
Server
AmazonS3
X-Powered-By
SSL and HTTP securityCertificate, protocol and security headers
SSL certificate
AvailableAvailable
Yes
Issuer
Amazon
CN
kotlinlang.org
Valid from
2026-08-05T19:00:00-05:00
Valid until
2027-02-19T17:59:59-06:00
Days remaining
194
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256
Security headers
2 activeHSTSNot detected
Content Security PolicyNot detected
X-Content-Type-OptionsNot detected
X-Frame-OptionsImplemented
Referrer PolicyImplemented
Permissions PolicyNot detected
Cross-Origin-Opener-PolicyNot detected
Cross-Origin-Embedder-PolicyNot detected
Cross-Origin-Resource-PolicyNot detected
DNS propagationComparison across public resolvers
Public resolver comparison
ReviewDifferences detected
5 public resolvers queried.
ResolverServerResultLatency
Google
8.8.8.818.160.200.25, 18.160.200.81, 18.160.200.87, 18.160.200.90
58,70 ms
Cloudflare
1.1.1.118.160.200.25, 18.160.200.81, 18.160.200.87, 18.160.200.90
53,20 ms
Quad9
9.9.9.954.192.100.72, 54.192.100.79, 54.192.100.83, 54.192.100.96
80,01 ms
OpenDNS
208.67.222.22218.160.200.25, 18.160.200.81, 18.160.200.87, 18.160.200.90
109,53 ms
AdGuard
94.140.14.1454.192.100.72, 54.192.100.79, 54.192.100.83, 54.192.100.96
267,65 ms
IP, geolocation and ASNAssociated network information
54.192.100.72
No datasuccess
No
country
region
city
asn
organization
isp
54.192.100.79
No datasuccess
No
country
region
city
asn
organization
isp
54.192.100.96
Identifiedsuccess
Yes
country
United States
country_code
US
region
Missouri
city
Kansas City
latitude
39.0997285
longitude
-94.5785681
asn
16509
organization
Amazon.com, Inc.
isp
Amazon.com, Inc.
timezone
America/Chicago
54.192.100.83
No datasuccess
No
country
region
city
asn
organization
isp
Visitor information
Visitorip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No
SMTPEmail port connectivity
alt1.aspmx.l.google.com
Port 25: Closed/unreachable - 0.8 ms - Port 465: Closed/unreachable - 4020.7 ms - Port 587: Closed/unreachable - 4021.2 ms -