grenaa-kostskole.dk DNS records

🖥️ Nameservers2 records 91ms

Nameserver	IP addresses	PTR	ASN / ISP
ns3.supportcenter.dk	87.54.32.150	—	AS3292 TDC Holding A/S
ns4.supportcenter.dk	2.106.7.200	ns4.supportcenter.dk	AS3292 TDC Holding A/S

🌍 A Records1 records 92ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
87.54.32.75	3600s	fpkmatnov2005.supportcenter.dk inventory.supportcenter.dk mit2.supportcenter.dk viacfutv.dk www.mit.supportcenter.dk www.supportcenter.dk www.viacfutv.dk	AS3292	TDC Holding A/S	87.48.0.0/13	🇩🇰 Denmark	—

📧 MX Records1 records 135ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	. Null MX — domain accepts no email (RFC 7505)

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 329ms

TXT Record
v=spf1 -all

✉️ SPF

Policy	Record (grenaa-kostskole.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC

Policy	Record (_dmarc.grenaa-kostskole.dk)
p=reject	v=DMARC1; p=reject;rua=mailto:dmarc@via.dk; ruf=mailto:dmarc@via.dk

📬 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

🔗 TLSA / DANE

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

🔐 DNSSEC339ms

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

🏷️ SOA0ms

Field	Value
Serial	861
Primary NS (MNAME)	ns3.supportcenter.dk
Responsible (RNAME)	hostmaster@supportcenter.dk
Refresh	900s
Retry	600s
Expire	86400s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

91ms

A

92ms

MX

135ms

AAAA

110ms

TXT

329ms

CAA

112ms

HTTPS

108ms

TLSA

311ms

SOA

0ms

MTA-STS

101ms

DNSSEC

339ms

SRV

117ms

Total

1296ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 13:18:12	1296ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-27 16:53:51	470ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-26 16:20:06	481ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-25 16:01:44	517ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-25 01:04:03	16752ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-24 00:43:03	2012ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-21 23:54:33	1118ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-18 22:01:28	1513ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-16 16:05:20	681ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-15 14:49:03	716ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-10 21:12:36	2843ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-09 19:12:36	491ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-08-08 04:30:12	3022ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-29 20:31:47	6376ms	2 NS 1 A 0 MX	🔒 Secure	View
2026-07-25 14:59:18	839ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-23 13:48:09	16517ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-21 05:18:53	8936ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-18 02:48:42	2408ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-16 15:21:25	1014ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-12 17:52:47	16529ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-09 03:56:15	1279ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-06 18:42:33	2423ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-07-03 20:11:20	4864ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-30 11:36:45	412ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-29 05:07:53	2563ms	2 NS 1 A 1 MX	🔒 Secure	View