gtbyg.dk

Records from scan: 2026-09-27 18:10:00 · 638ms total · last checked 2026-09-29 18:23 (unchanged)

gtbyg.dk is a .dk domain served by 2 nameservers (ns.scannet2.dk, ns2.scannet2.dk). Mail is handled by gtbyg-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a 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

2 records 32ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.scannet2.dk	185.25.141.9 2a02:2339:4006:10d::4171:4171	ns1.scannet.dk ns1.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.scannet2.dk	2a02:2339:1:112:0:5:1:b11 91.197.248.72	ns2.scannet.dk ns2.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records

🌍

No A records found

📧 MX Records

1 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	gtbyg-dk.mail.protection.outlook.com	2a01:111:f403:ca04::9 2a01:111:f403:ca21::8 2a01:111:f403:ca48::8 2a01:111:f403:ca48::e 52.101.103.162 52.101.68.21 52.101.68.27 52.101.73.155	mail-db7pr03cu00601.inbound.protection.outlook.com mail-matpr04cu00100.inbound.protection.outlook.com mail-miypr02cu00100.inbound.protection.outlook.com mail-miypr03cu00206.inbound.protection.outlook.com mail-miypr03cu00202.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-am7pr02cu00203.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 → 40.104.116.24

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records

1 records 57ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	1	100	5061	sipfed.online.lync.com

📝 TXT Records

4 records 128ms

TXT Record
GI5-EC7-GIT
GUJ-OZO-S3D
MS=ms79661797
v=spf1 ip4:5.186.71.41 include:spf.protection.outlook.com include:spf.comendosystems.com -all

✉️ SPF

Policy	Record (gtbyg.dk)
-all (hard fail)	v=spf1 ip4:5.186.71.41 include:spf.protection.outlook.com include:spf.comendosystems.com -all

📨 DMARC

Policy	Record (_dmarc.gtbyg.dk)
p=reject	v=DMARC1; p=reject;

📬 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 2026-09-29 18:23:06

www	Address record (no CNAME)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys

1 found

Selector	CNAME	Key
selector1	selector1-gtbyg-dk._domainkey.gtbyg.onmicrosoft.com	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: 4/10 · policy: -all

No problems found

🔗 TLSA / DANE

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

🔐 DNSSEC

68ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA

0ms

Field	Value
Serial	2025121203
Primary NS (MNAME)	ns.scannet2.dk
Responsible (RNAME)	hostmaster@scannet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

32ms

40ms

38ms

AAAA

33ms

TXT

128ms

CAA

29ms

HTTPS

29ms

TLSA

174ms

SOA

0ms

MTA-STS

56ms

DNSSEC

68ms

SRV

57ms

Total

638ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-27 18:10:00 shown	638ms	2 NS 0 A 1 MX	🔒 Secure
2026-08-27 14:03:39	1111ms	2 NS 0 A 1 MX	🔒 Secure
2026-06-26 02:59:10	2025ms	2 NS 0 A 1 MX	🔒 Secure
2026-06-17 10:12:05	4719ms	2 NS 0 A 1 MX	🔒 Secure