Domain technical report
Crystalinks Home Page
crystalinks.com
IPv41
IPv61
MX2
NS2
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69
Total
80
DNS
20
Email
65
Security
85
Network
100
Availability
Domaincrystalinks.com
IPv41
IPv61
MX records2
StatusActive
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
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 policy0 / 5 pts · Dns
Certificate authority restriction.
DNS propagation10 / 10 pts · Dns
Agreement between public resolvers.
MX records20 / 20 pts · Mail
2 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
159 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: 74-208-236-137.elastic-ssl.ui-r.com
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)74.208.236.137
AAAA
1 record(s)2607:f1c0:100f:f000::2e2
CNAME
0 record(s)—
Not configured
MX
2 record(s)10 mx00.ionos.com. 10 mx01.ionos.com.
TXT
0 record(s)—
Not configured
NS
2 record(s)ns52.1and1.com. ns51.1and1.com.
SOA
1 record(s)ns51.1and1.com. hostmaster.1and1.com. 2016051413 28800 7200 604800 300
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
Not configured—
Not configured
DKIM
Not found—
Not configured
Analyzed webpageMetadata and HTTP response
Title and description
ExtractedTitle
Crystalinks Home Page
Description
Final URL
https://crystalinks.com/
HTTP status
206
HTTP
Status
HTTP/2 200
Final URL
https://crystalinks.com/
Version
3
Server
Apache
X-Powered-By
SSL and HTTP securityCertificate, protocol and security headers
SSL certificate
AvailableAvailable
Yes
Issuer
Sectigo Limited
CN
*.crystalinks.com
Valid from
2026-07-05T19:00:00-05:00
Valid until
2027-01-16T17:59:59-06:00
Days remaining
159
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384
Security headers
0 activeHSTSNot 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
ConsistentConsistent propagation
5 public resolvers queried.
ResolverServerResultLatency
Google
8.8.8.874.208.236.137
101,32 ms
Cloudflare
1.1.1.174.208.236.137
56,84 ms
Quad9
9.9.9.974.208.236.137
55,96 ms
OpenDNS
208.67.222.22274.208.236.137
65,92 ms
AdGuard
94.140.14.1474.208.236.137
79,77 ms
IP, geolocation and ASNAssociated network information
74.208.236.137
No datasuccess
No
country
region
city
asn
organization
isp
Visitor information
Visitorip
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
mx00.ionos.com
Port 25: Closed/unreachable - 0.7 ms - Port 465: Closed/unreachable - 6.6 ms - Port 587: Closed/unreachable - 6.8 ms -