rsv.dk

Records from scan: 2026-06-26 21:49:56 · 1077ms total · last checked 2026-10-16 14:00 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rsv.dk is a .dk domain served by 3 nameservers (ns4.dns-123.net, ns5.dns-123.net, ns6.dns-123.net). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 5.186.164.154 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by rsv-dk.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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

3 records 49ms

Nameserver	IP addresses	PTR	ASN / ISP
ns4.dns-123.net	35.198.132.83	83.132.198.35.bc.googleusercontent.com	AS396982 Google LLC
ns5.dns-123.net	35.187.184.173	173.184.187.35.bc.googleusercontent.com	AS396982 Google LLC
ns6.dns-123.net	35.228.54.1	1.54.228.35.bc.googleusercontent.com	AS396982 Google LLC

🌍 A Records#

1 records 55ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
5.186.164.154	300s	server7154.serverpark.dk	AS44869	FIBIA P/S	5.186.0.0/16	🇩🇰 Denmark	Frederiksberg

📧 MX Records#

1 records 57ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	rsv-dk.mail.protection.outlook.com	2a01:111:f403:ca04::c 2a01:111:f403:ca09::7 2a01:111:f403:ca09::9 2a01:111:f403:ca09::d 52.101.68.15 52.101.68.29 52.101.73.28 52.101.73.8	mail-db9pr02cu00204.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-dbapr03cu00105.inbound.protection.outlook.com mail-am7pr05cu00204.inbound.protection.outlook.com mail-am0pr04cu00500.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 → 40.104.116.8
🔶 Autoconfig	5.186.164.154

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 396ms

TXT Record
MS=ms48428012
v=spf1 a mx ip4:5.186.17.117 include:spf.protection.outlook.com include:_spf.serverpark.dk include:spf.curanet.dk include:spf.comendosystems.com include:web.shared.mysmtp.com ~all

✉️ SPF#

Policy	Record (rsv.dk)
~all (soft fail)	v=spf1 a mx ip4:5.186.17.117 include:spf.protection.outlook.com include:_spf.serverpark.dk include:spf.curanet.dk include:spf.comendosystems.com include:web.shared.mysmtp.com ~all

📨 DMARC#

Policy	Record (_dmarc.rsv.dk)
p=none (monitor only)	v=DMARC1; p=none; pct=100; rua=mailto:rua@dmarc.i123.dk; ruf=mailto:ruf@dmarc.i123.dk; sp=none; aspf=r; adkim=r; ri=86400;

📬 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#

checked 2026-10-10 07:41:26

www	5.186.164.154 (AS44869) (address records, no CNAME)
www vs bare domain	Same network rsv.dk: 5.186.164.154 (AS44869) www.rsv.dk: 5.186.164.154 (AS44869)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-rsv-dk._domainkey.rsvdk365.onmicrosoft.com	RSA · ~2048 bit
selector2	selector2-rsv-dk._domainkey.rsvdk365.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: 14/10 · policy: ~all

error 14 DNS lookups: the limit is 10, so a receiver whose evaluation gets past the 10th returns permerror (SPF fails)

🔗 TLSA / DANE#

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

🔐 DNSSEC#

82ms

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

🏷️ SOA#

48ms

Field	Value
Serial	2024082201
Primary NS (MNAME)	ns4.dns-123.net
Responsible (RNAME)	admin@dns-123.net
Refresh	28800s
Retry	7200s
Expire	604800s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

49ms

55ms

57ms

AAAA

58ms

TXT

396ms

CAA

49ms

HTTPS

57ms

TLSA

232ms

SOA

48ms

MTA-STS

96ms

DNSSEC

82ms

SRV

454ms

Total

1077ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-06-26 21:49:56 shown	1077ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-25 02:14:17	774ms	3 NS 1 A 0 MX	🔒 Secure
2026-06-22 12:42:30	1193ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 02:43:55	3714ms	3 NS 1 A 1 MX	🔒 Secure
2026-06-17 13:50:03	2791ms	3 NS 1 A 1 MX	🔒 Secure