rechenback.dk DNS records

🖥️ Nameservers4 records 42ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records1 records 881ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
162.159.140.166	3599s	—	AS13335	Cloudflare, Inc.	162.159.128.0/19	—	—

📧 MX Records2 records 52ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	smtp.google.com	142.250.150.26 142.250.150.27 172.253.130.27 172.253.152.26 172.253.152.27 2a00:1450:4010:c1c::1b 2a00:1450:4010:c20::1a 2a00:1450:4010:c22::1a 2a00:1450:4010:c22::1b	la-in-f26.1e100.net la-in-f27.1e100.net yulppbn-in-f27.1e100.net yulpptr-in-f26.1e100.net yulpptr-in-f27.1e100.net la-in-f27.1e100.net yulppbn-in-f26.1e100.net yulpptr-in-f26.1e100.net yulpptr-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	3600s	mx.simply.com	94.231.106.20	mx.simply.com	AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 72ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records3 records 157ms

TXT Record
google-site-verification=9-c9qkXzJSoM_FsyjxUqHX53jjY4A3sktMmgP8qQNJM
v=spf1 include:_spf.google.com include:spf.simply.com ~all
v=spf1 include:spf.simply.com -all

✉️ SPF

⚠ Multiple SPF records — RFC 7208 §4.5 violation (receivers must treat this as permerror)

Policy	Record (rechenback.dk)
~all (soft fail)	v=spf1 include:_spf.google.com include:spf.simply.com ~all
-all (hard fail)	v=spf1 include:spf.simply.com -all

📨 DMARC

Policy	Record (_dmarc.rechenback.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 / DANE2 records 147ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	97A3BA009F39C761BFFB6574340E8138…
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	A9D603AF4D7ED6B9246B4B68500CD6F2…

🔐 DNSSEC85ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081807
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

42ms

A

881ms

MX

52ms

AAAA

73ms

TXT

157ms

CAA

36ms

HTTPS

41ms

TLSA

147ms

SOA

0ms

MTA-STS

52ms

DNSSEC

85ms

SRV

72ms

Total

2216ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-19 02:36:59	2216ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-07-02 10:47:31	720ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-23 03:39:54	719ms	4 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 20:38:27	720ms	4 NS 1 A 2 MX	🔒 Secure	View