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65
Total
75
DNS
25
Email
69
Security
35
Network
100
Availability
Domaintypescriptlang.org
IPv45
IPv60
MX records0
StatusActive
Domain technical report

TypeScript: JavaScript With Syntax For Types.

typescriptlang.org

TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.

Generated: 2026-08-09T02:26:43-05:00 · Cached result

JSONCSVPDFVisit site
IPv45
IPv60
MX0
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

5 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 propagation10 / 10 pts · Dns

Agreement between public resolvers.

!
MX records0 / 20 pts · Mail

0 MX record(s).

!
SPF0 / 25 pts · Mail

SPF policy not found.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

87 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
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

5 record(s)
20.76.201.171
20.70.246.20
20.236.44.162
20.112.250.133
20.231.239.246

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

0 record(s)
—

Not configured

TXT

2 record(s)
"71z7qrm0ktfz0fjzj9mxyf5ntv9fydsm"
"chq4pfvlfb4v94bl6lfmlg4rt8mzcy6s"

NS

4 record(s)
ns3-04.azure-dns.org.
ns4-04.azure-dns.info.
ns1-04.azure-dns.com.
ns2-04.azure-dns.net.

SOA

1 record(s)
ns1-04.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300

CAA

1 record(s)
0 contactemail "caarecordaware@microsoft.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

Not configured
—

Not configured

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:rua@dmarc.microsoft;ruf=mailto:ruf@dmarc.microsoft;fo=1:s:d

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
TypeScript: JavaScript With Syntax For Types.
Description
TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.
Final URL
https://www.typescriptlang.org/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://www.typescriptlang.org/
Version
3
Server
GitHub.com
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Microsoft Corporation
CN
surface.com
Valid from
2026-07-27T03:28:29-05:00
Valid until
2026-11-04T01:28:29-06:00
Days remaining
87
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

1 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
Referrer PolicyNot detected
—
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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
20.112.250.133, 20.231.239.246, 20.236.44.162, 20.70.246.20, 20.76.201.171
117,88 ms
Cloudflare
1.1.1.1
20.112.250.133, 20.231.239.246, 20.236.44.162, 20.70.246.20, 20.76.201.171
32,22 ms
Quad9
9.9.9.9
20.112.250.133, 20.231.239.246, 20.236.44.162, 20.70.246.20, 20.76.201.171
55,74 ms
OpenDNS
208.67.222.222
20.112.250.133, 20.231.239.246, 20.236.44.162, 20.70.246.20, 20.76.201.171
47,48 ms
AdGuard
94.140.14.14
20.112.250.133, 20.231.239.246, 20.236.44.162, 20.70.246.20, 20.76.201.171
399,24 ms

IP, geolocation and ASNAssociated network information

20.76.201.171

No data
success
No
country
region
city
asn
organization
isp

20.70.246.20

No data
success
No
country
region
city
asn
organization
isp

20.236.44.162

No data
success
No
country
region
city
asn
organization
isp

20.112.250.133

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
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

typescriptlang.org

Port 25: Closed/unreachable - 0.9 ms - 
Port 465: Closed/unreachable - 4020.7 ms - 
Port 587: Closed/unreachable - 4020.8 ms -

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