steff-byg.dk

📜 Historical scan 2026-06-22 16:14:18 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

steff-byg.dk is a .dk domain served by 2 nameservers (ns1.hostcenter.dk, ns2.hostcenter.dk). It was registered on 6 May 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.107 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by steffbyg-dk01c.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 38ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.hostcenter.dk	208.94.148.4	ns10.dnsmadeeasy.com	AS16552 Tiggee LLC
ns2.hostcenter.dk	208.80.124.4	ns11.dnsmadeeasy.com	AS16552 Tiggee LLC

🌍 A Records#

1 records 49ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.107	300s	vm1057.enterprisecloud.nu	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 55ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	steffbyg-dk01c.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::a 2a01:111:f403:ca09:: 2a01:111:f403:ca09::8 52.101.68.32 52.101.73.11 52.101.73.15 52.101.73.4	mail-dbapr03cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am0pr83cu00404.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 → 52.98.154.152
🔶 Autoconfig	185.21.40.107

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 250ms

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

📝 TXT Records#

2 records 257ms

TXT Record
MS=ms12995341
v=spf1 ip4:62.199.208.28 ip4:185.66.2.69 ip4:185.154.241.133 include:spf.mentor-it.dk include:spf.truelink.dk include:spf.protection.outlook.com include:spf.curanet.dk include:mitcom.dk -all

✉️ SPF#

Policy	Record (steff-byg.dk)
-all (hard fail)	v=spf1 ip4:62.199.208.28 ip4:185.66.2.69 ip4:185.154.241.133 include:spf.mentor-it.dk include:spf.truelink.dk include:spf.protection.outlook.com include:spf.curanet.dk include:mitcom.dk -all

📨 DMARC#

Policy	Record (_dmarc.steff-byg.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:dmarc@mentor-it.dk; ruf=mailto:dmarc@mentor-it.dk; fo=1;

📬 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 2026-10-10 06:25:59

www	185.21.40.107 (AS48854) (address records, no CNAME)
www vs bare domain	Same network steff-byg.dk: 185.21.40.107 (AS48854) www.steff-byg.dk: 185.21.40.107 (AS48854)
Wildcard	Yes: any name under the zone resolves
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#

2 found

Selector	CNAME	Key
selector1	selector1-steffbyg-dk01c._domainkey.steffensens.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-steffbyg-dk01c._domainkey.steffensens.onmicrosoft.com	RSA · ~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: 9/10 · policy: -all

warn 9 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

146ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2009010400
Primary NS (MNAME)	ns20.digicertdns.com
Responsible (RNAME)	dns@digicertdns.com
Refresh	43200s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	180s

📋 Registration#

WHOIS fetched 2026-10-13 01:28:56

Field	Value
Registrar	CURANET A/S
Registered	1999-05-06
Expires	2027-06-30 (255d)

🔗 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
kbhfl.dk	CURANET A/S

📋 WHOIS#

⏱️ Lookup Timing#

38ms

49ms

55ms

AAAA

48ms

TXT

257ms

CAA

41ms

HTTPS

45ms

TLSA

1098ms

SOA

0ms

MTA-STS

100ms

DNSSEC

146ms

SRV

250ms

Total

3746ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 21:01:04	1421ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-19 03:46:34	920ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 19:47:36	979ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-17 16:53:08	7064ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-15 22:28:57	1646ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-14 20:26:13	6333ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-09 19:17:48	10204ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-07 06:35:46	1594ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-26 19:38:42	3687ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-20 23:34:10	1259ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-19 23:08:37	1111ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-18 10:29:50	8949ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-17 02:37:11	10430ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-03 15:09:56	1087ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-01 04:59:47	1230ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 16:14:18 shown	3746ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-19 00:40:22	1079ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-18 00:59:07	943ms	2 NS 1 A 1 MX	🔒 Secure