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82
Total
95
DNS
70
Email
100
Security
70
Network
60
Availability
Domaincodepen.io
IPv42
IPv62
MX records5
StatusActive
Domain technical report

Just a moment...

codepen.io

Generated: 2026-08-08T20:29:34-05:00 · Cached result

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IPv42
IPv62
MX5
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 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.

!
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

64 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

✓
HTTP security headers35 / 35 pts · Security

9 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 connectivity35 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

!
HTTP response0 / 40 pts · Availability

HTTP/2 403

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
104.16.147.32
104.16.163.32

AAAA

2 record(s)
2606:4700::6810:9320
2606:4700::6810:a320

CNAME

0 record(s)
—

Not configured

MX

5 record(s)
5 alt1.aspmx.l.google.com.
10 aspmx2.googlemail.com.
1 aspmx.l.google.com.
10 aspmx3.googlemail.com.
5 alt2.aspmx.l.google.com.

TXT

2 record(s)
"v=spf1 include:s43465759.fdmarc.net ~all"
"google-site-verification=ee6yZSYLRMH7NdG8DSox4-fH0btH7GdMbMyY7zHenxY"

NS

2 record(s)
kristin.ns.cloudflare.com.
albert.ns.cloudflare.com.

SOA

1 record(s)
albert.ns.cloudflare.com. dns.cloudflare.com. 2411530579 10000 2400 604800 1800

CAA

0 record(s)
—

Not configured

DS

1 record(s)
2371 13 2 B8D4185E08C97DB614E5ABA82CD4A9372A7AD474C35AD2B752D6DC2E 5C579AB6

DNSKEY

2 record(s)
256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==

RRSIG

0 record(s)
—

Not configured

NSEC

1 record(s)
\000.codepen.io. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

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

Configured
v=spf1 include:s43465759.fdmarc.net ~all

DMARC

Configured
v=DMARC1; p=quarantine; rua=mailto:794c09812c0a4c7a8f4d400401c310ac@dmarc-reports.cloudflare.net; aspf=s; adkim=s

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Just a moment...
Description
Final URL
https://codepen.io/
HTTP status
403

HTTP

Status
HTTP/2 403
Final URL
https://codepen.io/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
codepen.io
Valid from
2026-07-13T21:43:48-05:00
Valid until
2026-10-11T22:43:46-05:00
Days remaining
64
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

9 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
✓
Cross-Origin-Opener-PolicyImplemented
✓
Cross-Origin-Embedder-PolicyImplemented
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.16.147.32, 104.16.163.32
63,86 ms
Cloudflare
1.1.1.1
104.16.147.32, 104.16.163.32
19,56 ms
Quad9
9.9.9.9
104.16.147.32, 104.16.163.32
25,28 ms
OpenDNS
208.67.222.222
104.16.147.32, 104.16.163.32
25,41 ms
AdGuard
94.140.14.14
104.16.147.32, 104.16.163.32
42,65 ms

IP, geolocation and ASNAssociated network information

104.16.147.32

No data
success
No
country
region
city
asn
organization
isp

104.16.163.32

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

alt1.aspmx.l.google.com

Port 25: Closed/unreachable - 0.7 ms - 
Port 465: Closed/unreachable - 4006.4 ms - 
Port 587: Closed/unreachable - 4021.2 ms -

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