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63
Total
70
DNS
25
Email
73
Security
100
Network
60
Availability
Domainapp.link
IPv44
IPv68
MX records0
StatusActive
Domain technical report

app.link

app.link

Generated: 2026-08-08T20:55:50-05:00 · Cached result

JSONCSVPDFVisit site
IPv44
IPv68
MX0
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

4 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

8 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 policy0 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

!
MX records0 / 20 pts · Mail

0 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

!
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

195 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: server-18-238-25-103.cmh68.r.cloudfront.net

✓
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/2 404

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

4 record(s)
18.238.25.103
18.238.25.79
18.238.25.50
18.238.25.44

AAAA

8 record(s)
2600:9000:25f5:8000:19:9934:6a80:93a1
2600:9000:25f5:3a00:19:9934:6a80:93a1
2600:9000:25f5:da00:19:9934:6a80:93a1
2600:9000:25f5:6000:19:9934:6a80:93a1
2600:9000:25f5:ec00:19:9934:6a80:93a1
2600:9000:25f5:800:19:9934:6a80:93a1
2600:9000:25f5:c800:19:9934:6a80:93a1
2600:9000:25f5:2c00:19:9934:6a80:93a1

CNAME

0 record(s)
—

Not configured

MX

0 record(s)
—

Not configured

TXT

3 record(s)
"google-site-verification=jFobHOfP7n6ugi0Y9aObMrtJWcec5jZg0PwmoIMCPco"
"google-site-verification=FXJOkLzb6EKqvgtikG5X2LojokNDBwpYdzJ3qnOo_Q4"
"v=spf1 -all"

NS

4 record(s)
ns-1521.awsdns-62.org.
ns-249.awsdns-31.com.
ns-1800.awsdns-33.co.uk.
ns-615.awsdns-12.net.

SOA

1 record(s)
ns-1521.awsdns-62.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

0 record(s)
—

Not configured

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

Configured
v=spf1 -all

DMARC

Not configured
—

Not configured

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Description
Final URL
https://app.link/
HTTP status
404

HTTP

Status
HTTP/2 404
Final URL
https://app.link/
Version
3
Server
openresty
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Amazon
CN
appipv4.link
Valid from
2026-01-22T18:00:00-06:00
Valid until
2027-02-20T17:59:59-06:00
Days remaining
195
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

2 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
✓
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

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
52.84.127.115, 52.84.127.38, 52.84.127.54, 52.84.127.90
72,79 ms
Cloudflare
1.1.1.1
3.170.103.127, 3.170.103.31, 3.170.103.41, 3.170.103.60
46,21 ms
Quad9
9.9.9.9
18.238.152.11, 18.238.152.35, 18.238.152.49, 18.238.152.97
50,35 ms
OpenDNS
208.67.222.222
52.84.127.115, 52.84.127.38, 52.84.127.54, 52.84.127.90
55,28 ms
AdGuard
94.140.14.14
108.157.142.111, 108.157.142.128, 108.157.142.28, 108.157.142.6
67,37 ms

IP, geolocation and ASNAssociated network information

18.238.25.103

No data
success
No
country
region
city
asn
organization
isp

18.238.25.79

No data
success
No
country
region
city
asn
organization
isp

18.238.25.50

No data
success
No
country
region
city
asn
organization
isp

18.238.25.44

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

app.link

Port 25: Closed/unreachable - 1.1 ms - 
Port 465: Closed/unreachable - 4010.9 ms - 
Port 587: Closed/unreachable - 4021.4 ms -

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