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74
Total
75
DNS
70
Email
65
Security
50
Network
100
Availability
Domainlinkr.bio
IPv41
IPv60
MX records0
StatusActive
Domain technical report

Upgrading - Linkr Service

linkr.bio

Generated: 2026-08-09T06:30:26-05:00 · Cached result

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IPv41
IPv60
MX0
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 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 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).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 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.

!
HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: 250.241.8.34.bc.googleusercontent.com

i
IPv4 diversity20 / 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

1 record(s)
34.8.241.250

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

0 record(s)
—

Not configured

TXT

3 record(s)
;; communications error to 69.64.44.20#53: timed out
"v=spf1 include:sendgrid.net include:_spf.google.com ~all"
"google-site-verification=QF5ZS-IWwxl74bC0YlpUHE2-Ur_T5J-ZujDcxSL6tvs"

NS

2 record(s)
dns31.hichina.com.
dns32.hichina.com.

SOA

1 record(s)
dns31.hichina.com. hostmaster.hichina.com. 2026011209 3600 1200 86400 600

CAA

4 record(s)
0 issue "pki.goog"
0 issue "letsencrypt.org"
0 iodef "mailto:hello@linkr.bio"
0 issue "sectigo.com"

DS

0 record(s)
—

Not configured

DNSKEY

1 record(s)
;; communications error to 69.64.44.20#53: timed out

RRSIG

1 record(s)
;; communications error to 69.64.44.20#53: timed out

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 include:sendgrid.net include:_spf.google.com ~all

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:hello@linkr.bio; ruf=mailto:hello@linkr.bio

DKIM

Selector google
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsJ/Rfae7n9z2B5i/UW1NfOHqnYB9nUzA4sittJiHVH4Ta97KqL9LhNn3hxXVgrnEdSBMgwqnWLWvXNuFcbuEKn2lWwfC1496CnK25ik2xOzRkcCzVdAAfzKrSCWeYwDdimLJsj3a3BZphk7Wqi0hPsMVxy/jVUzgzuY7ZD3wR3CoZEMtKz7WgPJFY4vMig40bUDqvTKrC6+cva8XMh75bSb1EccrqZ4ptx4zUJn+Pk02/X1C6AFu4JnyPykdO41SwilFwvm6OF3rbjyM67IOr5z8XvTdu1U3KYjWJRfcnfb7fYIABhBm/VFjvXUr56K1j61zXiIno7T8+nq1ae6YFwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Upgrading - Linkr Service
Description
Final URL
https://linkr.bio/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://linkr.bio/
Version
3
Server
UploadServer
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
linkr.bio
Valid from
2026-07-01T20:33:53-05:00
Valid until
2026-09-29T21:28:04-05:00
Days remaining
51
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

0 active
—
HSTSNot detected
—
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
34.8.241.250
368,10 ms
Cloudflare
1.1.1.1
34.8.241.250
243,44 ms
Quad9
9.9.9.9
34.8.241.250
381,45 ms
OpenDNS
208.67.222.222
34.8.241.250
1.913,54 ms
AdGuard
94.140.14.14
34.8.241.250
435,74 ms

IP, geolocation and ASNAssociated network information

34.8.241.250

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

linkr.bio

Port 25: Closed/unreachable - 208.6 ms - 
Port 465: Closed/unreachable - 4015.7 ms - 
Port 587: Closed/unreachable - 4232.8 ms -

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