theory.dk DNS records

🖥️ Nameservers2 records 65ms

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 Records1 records 2042ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
85.27.184.21	43198s	—	AS34705	Norlys Telco A/S	85.27.128.0/17	🇩🇰 Denmark	Brønderslev

📧 MX Records5 records 35ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	43200s	aspmx.l.google.com	2a00:1450:4010:c05::1b 2a00:1450:4010:c05::1b 74.125.205.27	li-in-f27.1e100.net li-in-x1b.1e100.net le-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	43200s	alt1.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1b	lcdels-in-f27.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	43200s	alt2.aspmx.l.google.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1b	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx2.googlemail.com	192.178.158.27 2404:6800:4013:813::1b	lcdels-in-f27.1e100.net lcdels-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	43200s	aspmx3.googlemail.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1b	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	85.27.184.21
🔶 Autoconfig	85.27.184.21

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records1 records 224ms

TXT Record
google-site-verification=ZK74hZ8R1xpHl629UzhPrgsa20tsevIDFP2z9Y5jOgE

✉️ SPF

✗ No SPF record — mail spoofing not restricted

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 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)

🔐 DNSSEC112ms

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

🏷️ SOA0ms

Field	Value
Serial	2026080901
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

65ms

A

2042ms

MX

35ms

AAAA

35ms

TXT

224ms

CAA

72ms

HTTPS

47ms

TLSA

103ms

SOA

0ms

MTA-STS

111ms

DNSSEC

112ms

SRV

79ms

Total

2760ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 21:52:07	2760ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-08-09 14:33:05	1620ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-07-12 01:50:41	1289ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-21 21:52:20	692ms	2 NS 1 A 5 MX	🔒 Secure	View
2026-06-18 05:29:09	4371ms	2 NS 1 A 5 MX	🔒 Secure	View