duff.dk DNS records

🖥️ Nameservers2 records 220ms

Nameserver	IP addresses	PTR	ASN / ISP
mona.ns.cloudflare.com	108.162.192.206 172.64.32.206 173.245.58.206 2606:4700:50::adf5:3ace 2803:f800:50::6ca2:c0ce 2a06:98c1:50::ac40:20ce	mona.ns.cloudflare.com mona.ns.cloudflare.com mona.ns.cloudflare.com mona.ns.cloudflare.com mona.ns.cloudflare.com mona.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
stan.ns.cloudflare.com	108.162.193.235 172.64.33.235 173.245.59.235 2606:4700:58::adf5:3beb 2803:f800:50::6ca2:c1eb 2a06:98c1:50::ac40:21eb	stan.ns.cloudflare.com stan.ns.cloudflare.com stan.ns.cloudflare.com stan.ns.cloudflare.com stan.ns.cloudflare.com stan.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 234ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.28.195	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.147.106	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records7 records 211ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
11	300s	aspmx.l.google.com	2a00:1450:400c:c07::1b 2a00:1450:400c:c07::1b 66.102.1.26	wo-in-x1b.1e100.net wo-in-f27.1e100.net wb-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
20	300s	alt1.aspmx.l.google.com	172.253.152.26 2a00:1450:4013:c1e::1a	yulpptr-in-f26.1e100.net yugrqzs-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
20	300s	alt2.aspmx.l.google.com	142.251.127.26 2a00:1450:4001:c21::1a	lcfrai-in-f26.1e100.net lcfrai-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	300s	aspmx2.googlemail.com	192.178.213.27 2a00:1450:4013:c1e::1a	yugrqzs-in-f27.1e100.net yugrqzs-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	300s	aspmx3.googlemail.com	142.251.127.27 2a00:1450:4001:c21::1a	lcfrai-in-f27.1e100.net lcfrai-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	300s	aspmx4.googlemail.com	142.250.147.26 2a00:1450:4025:c01::1a	rd-in-f26.1e100.net rd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	300s	aspmx5.googlemail.com	172.253.152.26 2a00:1450:4010:c22::1a	yulpptr-in-f26.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)2 records 265ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::ac43:936a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3033::6815:1cc3	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 252ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.28.195,172.67.147.106 ech=AEX+DQBBvAAgACBDGjd7KAA//oYh2o3NrutZX4VpGmOe42gVNB175MZ0bAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:936a,2606:4700:3033::6815:1cc3

📝 TXT Records2 records 889ms

TXT Record
16de091ba0a169f3aab4545ad050398a
v=spf1 include:_spf.google.com ~all

✉️ SPF

Policy	Record (duff.dk)
~all (soft fail)	v=spf1 include:_spf.google.com ~all

📨 DMARC

Policy	Record (_dmarc.duff.dk)
p=reject	v=DMARC1; p=reject; pct=100

📬 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)

🔐 DNSSEC519ms

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

🏷️ SOA261ms

Field	Value
Serial	2407281203
Primary NS (MNAME)	mona.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

220ms

A

234ms

MX

211ms

AAAA

265ms

TXT

889ms

CAA

219ms

HTTPS

252ms

TLSA

534ms

SOA

261ms

MTA-STS

267ms

DNSSEC

519ms

SRV

274ms

Total

4498ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 19:00:31	1205ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-08-17 00:28:54	6775ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-08-06 00:58:41	3185ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-07-22 14:52:41	10013ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-07-12 17:20:37	1865ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-06-25 12:51:01	4498ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-06-21 15:25:05	3213ms	2 NS 2 A 7 MX	🔒 Secure	View
2026-06-17 04:55:09	655ms	2 NS 2 A 7 MX	🔒 Secure	View