itwbyg.dk

📜 Historical scan 2026-09-29 01:45:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

itwbyg.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 1 September 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 51.105.147.223 is hosted by Microsoft Corporation (AS8075) in The Netherlands. Mail is handled by itwbyg-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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 36ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
51.105.147.223	1800s	—	AS8075	Microsoft Corporation	51.104.0.0/15	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

1 records 45ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
5	3600s	itwbyg-dk.mail.protection.outlook.com	2a01:111:f403:c902::1 2a01:111:f403:c946::5 2a01:111:f403:f804::3 2a01:111:f403:f901::1 52.101.10.6 52.101.194.3 52.101.41.24 52.101.60.151	mail-sj2pr05cu00401.inbound.protection.outlook.com mail-ch4pr21cu00105.inbound.protection.outlook.com mail-co1pr03cu00403.inbound.protection.outlook.com mail-bl0pr02cu00601.inbound.protection.outlook.com mail-bn1pr21cu00106.inbound.protection.outlook.com mail-ch1pr04cu00103.inbound.protection.outlook.com mail-sj0pr03cu01600.inbound.protection.outlook.com mail-bnypr03cu00107.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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 139ms

TXT Record
E44AZPWBL9ZL67S1ELHTO3G3QM2GYQT4BCJT53SK
MS=ms80576978
v=spf1 ip4:87.54.4.138 ip4:87.54.4.139 ip4:81.200.33.53 ip4:78.156.98.47 include:spf.securesmtp.dk include:spf.protection.outlook.com include:spf.hostnordic.com -all

✉️ SPF#

Policy	Record (itwbyg.dk)
-all (hard fail)	v=spf1 ip4:87.54.4.138 ip4:87.54.4.139 ip4:81.200.33.53 ip4:78.156.98.47 include:spf.securesmtp.dk include:spf.protection.outlook.com include:spf.hostnordic.com -all

📨 DMARC#

Policy	Record (_dmarc.itwbyg.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:dmarc_agg@vali.email

📬 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#

latest probe, not this scan · checked 2026-10-13 00:32:12

www	51.105.147.223 (AS8075) (address records, no CNAME)
www vs bare domain	Same network itwbyg.dk: 51.105.147.223 (AS8075) www.itwbyg.dk: 51.105.147.223 (AS8075)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

3 found

Selector	CNAME	Key
s1	s1.domainkey.u14659792.wl043.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u14659792.wl043.sendgrid.net	RSA · ~2048 bit
selector1	selector1-itwbyg-dk._domainkey.itwconnect.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: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

116ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2026092801
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-13 00:50:49

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2008-09-01
Expires	2027-09-30 (342d)

🔗 Same registrant#

1 domain

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
paslode.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

36ms

45ms

AAAA

40ms

TXT

139ms

CAA

39ms

HTTPS

41ms

TLSA

780ms

SOA

0ms

MTA-STS

51ms

DNSSEC

116ms

SRV

45ms

Total

1371ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 00:32:12	1841ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-09 12:25:51	1415ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-04 09:38:22	903ms	2 NS 1 A 1 MX	🔒 Secure
2026-10-04 02:18:32	1120ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-29 01:45:49 shown	1371ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-21 07:31:35	1776ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-29 17:45:05	812ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 20:34:48	3738ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 19:46:56	1231ms	2 NS 1 A 1 MX	🔒 Secure