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Total

DNS

Email

Security

Network

100

Availability

Domainweb.dev

IPv41

IPv61

MX records0

StatusActive

Domain technical report

web.dev

Guidance to build modern web experiences that work on any browser.

Generated: 2026-08-08T18:39:35-05:00 · Cached result

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IPv41

IPv61

MX0

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

1 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.

DMARC0 / 25 pts · Mail

DMARC policy not found.

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 headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: any-in-201b.1e100.net

IPv4 diversity20 / 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 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

1 record(s)

216.239.32.27

AAAA

1 record(s)

2001:4860:4802:32::1b

CNAME

0 record(s)

—

Not configured

MX

0 record(s)

—

Not configured

TXT

1 record(s)

"google-site-verification=1KUpoM0U9uMGLkzIL1CaCnZDapQByrD74Wr92wrYZdA"

NS

4 record(s)

ns3.zdns.google.
ns1.zdns.google.
ns4.zdns.google.
ns2.zdns.google.

SOA

1 record(s)

ns1.zdns.google. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300

CAA

2 record(s)

0 issue "pki.goog"
0 issue "letsencrypt.org"

DS

0 record(s)

—

Not configured

DNSKEY

2 record(s)

256 3 8 AwEAAaKqmEhXDHrGrxLg5cZdId9NJg+tOR0hsXa+o/K/0h2oehVWch4q 1nsc/NaPAnJkwfbk++VGBnVSLMQRD5oi65AUIzAyau9y2ZtLGVqJN9cg zeWriI/IAWG35SsBq/Q3upl+gU5O5LyC/EnRL8RO+DUECAuo7Geq1OhG hyhq0WSR
257 3 8 AwEAAYSLv8Vj4oEjn1xXQgf2Zrd+h/KpcMJyaH6DOofb2yjou0+MddgU Y9j0fxK7ESgWl31g8CoegPht+pW8fzafNLGemFWavD70e2SkB14+8qeg DYZ/kR5IE+1N9/HVrIjLWbsh/Qovp/0OTdwSAaJu6a2adtkolV8OpCWZ J2qq0Bk71yszDQF2jmWuvxbe6QqsKbF07iShFz7C6M33QPJ9pSaVG6Oq g3SvhVK7M6yXoUeP0cKLNoVmWyY9qTT4lAfaMRnm8Jy1Yi1WgzCY8kVb u8PTlkEpIQZpgiTOyF0ecRI6pYTP8vPJOapnJmPapaIjf7q8f/LZMTAX JkWs5qnVq5U=

RRSIG

5 record(s)

DNSKEY 8 2 300 20260828205110 20260806205110 45175 web.dev. LCuKDCbsjicVyWBamuzDL2A6P4ivgGVawJv9AhebGRi+Ik2Vc//SbZW6 TtuBMl6NUbYAcrNOauPoy5aRzPgcAacn0KINMGHKud0BRBsUfymR1T6T NXyXQGb+j1SxkuFfxgCrxbEAn5mODOOjpEzWlvJKei45va+M8ivO5Viw SCi+U8IxNQsZ+pOQ2vVngcCAstCXXacvqAtdQcRkbAaWawTIEoWdpgAH CnBOlPAdSe3iRzoXC26nZgx6SteNymFq2QvY1h9m1QZIiYVJgA7+5Kgl rCZysalcIhv0CJswZ3DlICkcjQrhIVrS3YPf5DdBPlauSDqILGcUxnVi CSch3g==
NS 8 2 21600 20260828205110 20260806205110 27558 web.dev. Y7SdKKUXRn6k5Tv7i4bPEEo+SDXzKWZcXTllellnmFdL/1Jt43egwNpj Uk1t6u352Mp+5UaSdNLTXsKl25Jw39+dhx5RQM7+4kgcFob5t5N/E/DD gvIPrhNBD65tweHRZVwfC99psTxzfuGI1XbAUwBCANWwY2bfR2NMSAhs mhI=
SOA 8 2 21600 20260828205110 20260806205110 27558 web.dev. kOE73p7gYUPrwTWiBdeZbXzcynJF2PLQDr1HrQ2KQRTBvZWdJKYIiyT3 A0anh+F/0MUlbRF2hTHjWfbd7WXAaO41A/ScW1Uz02vBvgY+U7fJRtP0 JvzWgKs/BVKvbelLq4aGP0t3nG0V/zc0o0BdsZb7R2a7pa41Kirj76wY 0yw=
TXT 8 2 3600 20260828205110 20260806205110 27558 web.dev. echX44/0UAPmldmD4z3mMFLjiXNFVdrSa/3LnwJoyF6SJ1/hb/rcg5bz nDBN2ipCL6uAXfvbBFNZHjCoJ/h3AmbzZ2WAyjeymInGZP07Xe/cDqc8 1MBtSkhOfJ5qmBaq5UPr189vdtqEzfqDInm7vxl+wceHurPhG/UbCwzF E6I=
AAAA 8 2 300 20260828205110 20260806205110 27558 web.dev. e8fo8Mtvx2OIkhOlPz+CxocMKFeIMm8qDVlQwZo1abW1GG2OQLMHxZqX tFy+TS4HaV4xPii71HZI2U+32m9qCG0QmhfZ62CVipwbyeCLKRHsx5v1 at0T6JSj5dYT+F8xksjFXGLVcsiBeMzbVtewMijxsO4TkQK31CVQMCKk 9Gw=

NSEC

1 record(s)

*.web.dev. A NS SOA TXT AAAA RRSIG NSEC DNSKEY CDS 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

Not configured

—

Not configured

DMARC

Not configured

—

Not configured

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

web.dev

Description

Guidance to build modern web experiences that work on any browser.

Final URL

https://web.dev/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://web.dev/

Version

Server

Google Frontend

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Google Trust Services

devsite-sni.developers.google.com

Valid from

2026-07-20T13:05:57-05:00

Valid until

2026-10-12T13:05:56-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

3 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

—

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

216.239.32.27

46,90 ms

Cloudflare

1.1.1.1

216.239.32.27

54,40 ms

Quad9

9.9.9.9

216.239.32.27

223,13 ms

OpenDNS

208.67.222.222

216.239.32.27

163,92 ms

AdGuard

94.140.14.14

216.239.32.27

229,24 ms

IP, geolocation and ASNAssociated network information

216.239.32.27

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

web.dev

Port 25: Closed/unreachable - 4018.1 ms - 
Port 465: Closed/unreachable - 4020.6 ms - 
Port 587: Closed/unreachable - 4020.9 ms -

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