certasonline.dk

Records from scan: 2026-09-19 15:34:05 · 10126ms total · last checked 2026-10-15 23:24 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

certasonline.dk is a .dk domain served by 3 nameservers (ns0.phase8.net, ns1.phase8.net, ns2.phase8.net). It was registered on 28 September 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.238.54.167 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by certasonline-dk.mail.eo.outlook.com. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

3 records 57ms

Nameserver	IP addresses	PTR	ASN / ISP
ns0.phase8.net	81.88.63.114	ns0.phase8.net	AS39729 Register S.p.A.
ns1.phase8.net	85.233.160.68	ns1.phase8.net	AS8622 Team Blue Internet Services Uk Limited
ns2.phase8.net	91.186.2.48	ns2.phase8.net	AS29550 Team Blue Carrier Limited

🌍 A Records#

1 records 46ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
20.238.54.167	600s	—	AS8075	Microsoft Corporation	20.192.0.0/10	🇮🇪 Ireland	Dublin

📧 MX Records#

1 records 68ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
30	600s	certasonline-dk.mail.eo.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::9 2a01:111:f403:ca09::24 2a01:111:f403:ca21::10 52.101.103.140 52.101.209.153 52.101.68.16 52.101.73.123	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-am6pr02cu00204.inbound.protection.outlook.com mail-matpr05cu00100.inbound.protection.outlook.com mail-miypr02cu00204.inbound.protection.outlook.com mail-cpjpr04cu00101.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-am6pr02cu00203.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 112ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

8 records 310ms

TXT Record
2019091013374144saa9tqkm54b9sx0sko3ouf5d8rktoe68kqnwp7pu501vw9cw
24031a8s6jf07a0grib7k5kloi
67v4es5v71a6g2t87jloh3rdaa
Copy recordMS=ms11489311
gbk3oecdj0o82g4gr7nvqu7mbv
jp1nnnoucmra85bu60psiprcfh
MS=ms60392323
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (certasonline.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

checked 2026-10-09 09:27:43

www	20.238.54.167 (AS8075) (address records, no CNAME)
www vs bare domain	Same network certasonline.dk: 20.238.54.167 (AS8075) www.certasonline.dk: 20.238.54.167 (AS8075)
Wildcard	No

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u10158738.wl239.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u10158738.wl239.sendgrid.net	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

9086ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2026081301
Primary NS (MNAME)	ns0.phase8.net
Responsible (RNAME)	support@phase8.net
Refresh	28800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-08 15:07:44

Field	Value
Registrar	ASCIO TECHNOLOGIES, CORP. DANMARK - FILIAL AF ASCIO TECHNOLOGIES, CORP. CANADA
Registered	2017-09-28
Expires	2027-09-30 (348d)

📋 WHOIS#

⏱️ Lookup Timing#

57ms

46ms

68ms

AAAA

80ms

TXT

310ms

CAA

80ms

HTTPS

56ms

TLSA

88ms

SOA

0ms

MTA-STS

124ms

DNSSEC

9086ms

SRV

112ms

Total

10126ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-19 15:34:05 shown	10126ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-14 06:31:01	5470ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-28 07:36:46	4610ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-23 07:40:58	1143ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 20:10:48	3680ms	3 NS 1 A 1 MX	🔓 Insecure