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72
Total
70
DNS
45
Email
73
Security
65
Network
100
Availability
Domainbacklinko.com
IPv42
IPv60
MX records5
StatusActive
Domain technical report

Backlinko: SEO, Content Marketing, & Link Building Strategies

backlinko.com

It's time to get backlinks that make a difference. Backlinko is the place for next-level SEO training and link building strategies.

Generated: 2026-08-08T22:10:45-05:00 · Cached result

JSONCSVPDFVisit site
IPv42
IPv60
MX5
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 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 propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

5 MX record(s).

!
SPF0 / 25 pts · Mail

SPF policy not found.

✓
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

47 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: afa7f374f51cc8991.awsglobalaccelerator.com

✓
IPv4 diversity35 / 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

2 record(s)
3.33.186.135
15.197.167.90

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

5 record(s)
5 alt1.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt3.aspmx.l.google.com.
10 alt4.aspmx.l.google.com.

TXT

5 record(s)
"google-site-verification=dxxKd2phKddRux7_2OUuEe6NzYxZe7MoRE-Ht4l7AMg"
"google-site-verification=ydTK7Nghc98RUm0afOS4OqnCV8S0AP3sLuFCNXbrkxw"
"google-site-verification=rGQeOIsP0BszYIo9IeHwMjx6V2DTXDVb8svLW1vP-rE"
"google-site-verification=G1Z9KnHYpbhaEkwi19NGXHDbWHXPdCCWLc-K1Eviqoo"
"google-site-verification=Eq_cnun_H4DceU4N_NfJUG9UMrSaCoFiVw1IpG3HcfI"

NS

4 record(s)
dns1.p02.nsone.net.
dns3.p02.nsone.net.
dns2.p02.nsone.net.
dns4.p02.nsone.net.

SOA

1 record(s)
dns1.p02.nsone.net. domains+netlify.netlify.com. 1663265645 43200 7200 1209600 3600

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

Not configured
—

Not configured

DMARC

Configured
v=DMARC1; p=none; pct=100; rua=mailto:dmarc@fbl.optin.com;

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Backlinko: SEO, Content Marketing, & Link Building Strategies
Description
It's time to get backlinks that make a difference. Backlinko is the place for next-level SEO training and link building strategies.
Final URL
https://backlinko.com/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://backlinko.com/
Version
3
Server
Netlify
X-Powered-By
Next.js

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
backlinko.com
Valid from
2026-06-26T23:07:34-05:00
Valid until
2026-09-24T23:07:33-05:00
Days remaining
47
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

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
15.197.167.90, 3.33.186.135
89,33 ms
Cloudflare
1.1.1.1
15.197.167.90, 3.33.186.135
67,36 ms
Quad9
9.9.9.9
15.197.167.90, 3.33.186.135
120,59 ms
OpenDNS
208.67.222.222
15.197.167.90, 3.33.186.135
55,42 ms
AdGuard
94.140.14.14
15.197.167.90, 3.33.186.135
74,93 ms

IP, geolocation and ASNAssociated network information

3.33.186.135

No data
success
No
country
region
city
asn
organization
isp

15.197.167.90

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 - 1.3 ms - 
Port 465: Closed/unreachable - 4001 ms - 
Port 587: Closed/unreachable - 4020 ms -

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