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84
Total
100
DNS
100
Email
81
Security
70
Network
60
Availability
Domainlnk.bio
IPv43
IPv63
MX records5
StatusActive
Domain technical report

Attention Required! | Cloudflare

lnk.bio

Generated: 2026-08-09T17:44:03-05:00 · Cached result

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IPv43
IPv63
MX5
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

3 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

3 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 policy5 / 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.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

✓
MTA-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

51 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers16 / 35 pts · Security

4 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

3 record(s)
172.67.74.243
104.26.13.15
104.26.12.15

AAAA

3 record(s)
2606:4700:20::ac43:4af3
2606:4700:20::681a:d0f
2606:4700:20::681a:c0f

CNAME

0 record(s)
—

Not configured

MX

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

TXT

12 record(s)
"openai-domain-verification=dv-V8ldGzlLHwNzRxYJOko2w643"
"apple-domain-verification=3OTAPKD04XPQpaYF52R0TwrTL7WhuUkxw_xTdghKfPo"
"MS=6665EF0621AA32E95ED63A34434F3C322BBC091C"
"_hmz70hudmffgai5vk99ec2yts1q8af3"
"google-site-verification=hQje9qxeqhD0Ra91VBRbj-U4kwEk_9qTDlpyvSAV61M"
"v=MCPv1; k=ed25519; p=JuF3CqnEP0m0MK+ME4RaQakj920dqyedelIzxfDqrjs="
"hubspot-developer-verification=M2JhZjUzYjYtYTUzYS00MmQzLThlZmYtZWMwZjM3NjJlMTQx"
"v=spf1 mx a include:amazonses.com include:_spf.google.com -all"
"google-site-verification=w0k7i83-6SPO3zF-GZk88AHo6oztK4EmZcvDj9i3HPA"
"google-site-verification=3k1hniG700JGeSbF5gWS0hp-XjyTiXzfcpkmjrQ4i6c"
"pinterest-site-verification=35b1ba9414a04e15cfa9548773508940"
"stripe-verification=fdfaacdf6821d9098d85bdfb1295ee3d55ab27faf88ea9ad19a4ee8172052b0b"

NS

2 record(s)
maleah.ns.cloudflare.com.
will.ns.cloudflare.com.

SOA

1 record(s)
maleah.ns.cloudflare.com. dns.cloudflare.com. 2410125282 10000 2400 604800 1800

CAA

11 record(s)
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "letsencrypt.org"
0 issuewild "digicert.com; cansignhttpexchanges=yes"
0 issue "letsencrypt.org"
0 issue "comodoca.com"
0 issuewild "comodoca.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issue "ssl.com"
0 issuewild "ssl.com"
0 issue "amazon.com"
0 issuewild "pki.goog; cansignhttpexchanges=yes"

DS

1 record(s)
2371 13 2 2855FB0F436042C1355BB80E30F29B5162C6DA5B91CED65585236DB3 B1B45808

DNSKEY

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

RRSIG

3 record(s)
NS 13 2 86400 20260810234353 20260808214353 34505 lnk.bio. 36YGP344SBxbsLscv4i1lN+rEkFjkbQOCc+VVfYb7/+9i2Gilq8mWQd8 n1yROfhxrAh3+HHgSkOYn4u51nvozQ==
AAAA 13 2 300 20260810234353 20260808214353 34505 lnk.bio. S0WOTaaFw0VAMPzxKY9/FhfH7eif0PcUXsIxNvv4/IdeJRE7CztX4ykg Sq2v+iGuVvd5aD36yqUsuzFddICk2g==
DS 8 2 3600 20260830152525 20260809142525 39900 bio. typRPTI4NkNYiAjfiLWneDvYi6O04w9003znULsqeo11auKFCBV914KG tkT/FQuGZInkJOpg5oWS1eG0Uf0QeZksPlD46wE3/609jx4WOrTykfpg GKYHXPzpwxwC0rEZFZDZgUmemoKuQ1P9ovyKMXc5smn6PhYcmdAndoR6 lXY=

NSEC

1 record(s)
\000.lnk.bio. 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 mx a include:amazonses.com include:_spf.google.com -all

DMARC

Configured
v=DMARC1; p=reject; sp=reject; pct=100; ri=86400; rua=mailto:dmarc@lnk.bio

DKIM

Selector google
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCnjunKO2+vRa1dRIGPrpytB8nIr188FKlMtjl+2HaAbxivWA/vmGyfN9vjAZ/arGt2wPKMmSjlRaKAniPts3GArnheuguFldJuqfodaON8WeWLK5jOCb9p6xFDSteUACJDZ2oLq3hiA7gWB2JG0SYAe4z6SGFXJDOXDeejJK1xAQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Attention Required! | Cloudflare
Description
Final URL
https://lnk.bio/
HTTP status
403

HTTP

Status
HTTP/2 403
Final URL
https://lnk.bio/
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
lnk.bio
Valid from
2026-07-02T05:23:06-05:00
Valid until
2026-09-30T06:23:01-05:00
Days remaining
51
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

4 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.26.12.15, 104.26.13.15, 172.67.74.243
78,37 ms
Cloudflare
1.1.1.1
104.26.12.15, 104.26.13.15, 172.67.74.243
41,30 ms
Quad9
9.9.9.9
104.26.12.15, 104.26.13.15, 172.67.74.243
76,37 ms
OpenDNS
208.67.222.222
104.26.12.15, 104.26.13.15, 172.67.74.243
66,97 ms
AdGuard
94.140.14.14
104.26.12.15, 104.26.13.15, 172.67.74.243
51,63 ms

IP, geolocation and ASNAssociated network information

172.67.74.243

Identified
success
Yes
country
United States
country_code
US
region
California
city
San Francisco
latitude
37.7749113
longitude
-122.4185412
asn
13335
organization
Cloudflare, Inc.
isp
Cloudflare, Inc.
timezone
America/Los_Angeles

104.26.13.15

Identified
success
Yes
country
United States
country_code
US
region
California
city
San Francisco
latitude
37.7749113
longitude
-122.4185412
asn
13335
organization
Cloudflare, Inc.
isp
Cloudflare, Inc.
timezone
America/Los_Angeles

104.26.12.15

Identified
success
Yes
country
United States
country_code
US
region
California
city
San Francisco
latitude
37.7749113
longitude
-122.4185412
asn
13335
organization
Cloudflare, Inc.
isp
Cloudflare, Inc.
timezone
America/Los_Angeles

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 - 0.8 ms - 
Port 465: Closed/unreachable - 4020.6 ms - 
Port 587: Closed/unreachable - 4020.8 ms -

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