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85
Total
80
DNS
95
Email
77
Security
70
Network
100
Availability
Domaino2online.de
IPv42
IPv62
MX records4
StatusActive
Domain technical report

o2 | Mobilfunk, Festnetz, Smartphone & Internet

o2online.de

Dein Mobilfunkanbieter für ✓ günstige Handytarife ✓ Top-Smartphones ✓ Internet mobil & zu Hause ᐅ o2 Angebote entdecken.

Generated: 2026-08-10T18:52:48-05:00 · Cached result

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IPv42
IPv62
MX4
NS3

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

3 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

4 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-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

71 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers12 / 35 pts · Security

3 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 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)
141.101.90.39
141.101.90.38

AAAA

2 record(s)
2a06:98c1:3200::120:0:501
2a06:98c1:3200::120:0:500

CNAME

0 record(s)
—

Not configured

MX

4 record(s)
110 mx3c52.megamailservers.eu.
10 mx.o2online.de.
120 mx4c52.megamailservers.eu.
100 mx2c52.megamailservers.eu.

TXT

9 record(s)
"v=spf1 ip4:82.113.101.0/24 ip4:212.23.125.184 ip4:46.28.184.125 include:spf.mail.telefonica.de include:spfc50.megamailservers.eu include:spf.mailjet.com -all"
"wbjqxm9pt6krs013g6k3h6v6xwn6x3tz"
"google-site-verification=ilvQrILe7LToYDt98i1gjYtEVjrTSGEiJfR3BV57vew"
"trustpilot-one-time-verification-id=d7d7e916-a052-417e-99f2-62715f9e892a"
"google-site-verification: ub0a6_20S3EL-pUtqn2PIRG0MOA1TWO4SQijgY0nIAQ"
"_ndmcvxtiy3e4khz4kjr31phy9ii0r64"
"google-site-verification=FwT3kAVc80VnzKG5neMQDZQBnAAzXqUQ1JFqgkQUk9c"
"facebook-domain-verification=w9pmyg2ovroz7fvkbajxsxujzd1j6k"
"google-site-verification=7ZDGs63vaE7yemWciLcyS6TXixCaWiRv_PxkTr1Bok0"

NS

3 record(s)
ns3.o2online.de.
ns2.o2online.de.
ns1.o2online.de.

SOA

1 record(s)
ns1.o2online.de. domain-de.o2.com. 2026081001 10800 3600 604800 600

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 ip4:82.113.101.0/24 ip4:212.23.125.184 ip4:46.28.184.125 include:spf.mail.telefonica.de include:spfc50.megamailservers.eu include:spf.mailjet.com -all

DMARC

Configured
v=DMARC1; p=none; rua=mailto:dmarc@report.mail.telefonica.de

DKIM

Selector mailjet
k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQD31l0uDmCLKDgwoohsLBpouFfk+FWk9qpNmZ4JzIM9UVpMCJ9tUtgrbIpP9gfCHgg5oi30KsNnDnqwcHjWYsbSaJignVkX21DiFAtE3wzYN7NsNEW/wug9qRAczam348cBqJFkwWfG0RUPzE2s4hT3cab+EVA+H7O0OpFtLF200wIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
o2 | Mobilfunk, Festnetz, Smartphone & Internet
Description
Dein Mobilfunkanbieter für ✓ günstige Handytarife ✓ Top-Smartphones ✓ Internet mobil & zu Hause ᐅ o2 Angebote entdecken.
Final URL
https://www.o2online.de/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.o2online.de/
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
o2online.de
Valid from
2026-07-22T18:37:50-05:00
Valid until
2026-10-20T19:37:29-05:00
Days remaining
71
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

3 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
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
141.101.90.38, 141.101.90.39
35,31 ms
Cloudflare
1.1.1.1
141.101.90.38, 141.101.90.39
157,68 ms
Quad9
9.9.9.9
141.101.90.38, 141.101.90.39
153,55 ms
OpenDNS
208.67.222.222
141.101.90.38, 141.101.90.39
451,41 ms
AdGuard
94.140.14.14
141.101.90.38, 141.101.90.39
296,73 ms

IP, geolocation and ASNAssociated network information

141.101.90.39

No data
success
No
country
region
city
asn
organization
isp

141.101.90.38

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

mx3c52.megamailservers.eu

Port 25: Closed/unreachable - 82.3 ms - 
Port 465: Closed/unreachable - 4020.8 ms - 
Port 587: Closed/unreachable - 4131.6 ms -

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