crescendo.dk

📜 Historical scan 2026-08-06 04:05:09 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

crescendo.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 20 July 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 142.93.129.186 is hosted by DigitalOcean, LLC (AS14061) in The Netherlands. Mail is handled by crescendo-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 this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 76ms

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 Records#

1 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
142.93.129.186	600s	—	AS14061	DigitalOcean, LLC	142.93.0.0/16	🇳🇱 The Netherlands	Amsterdam

📧 MX Records#

1 records 62ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	crescendo-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca04::8 2a01:111:f403:ca09::2 2a01:111:f403:ca09::5 52.101.68.18 52.101.68.25 52.101.68.5 52.101.73.19	mail-db4pr02cu00204.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am1pr04cu00105.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-as8pr04cu00803.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 → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 103ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

5 records 189ms

TXT Record
google-site-verification=CfQ49g-ERECwmEM2fr7Ol0zX2sLkhKTDvnlUx-gF0zk
google-site-verification=k__jjntmOlbay9RZ-7RACfEtXijzfQamCZgIWBbSjX4
k=rsa; t=y;p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhALrX+Bh+Q57KLD29hcDi5+IUlMC7De8afAimNtDo0GcZfe71bEypT5liMe7LOEkBy1WoSG5zD0FT9zby0Vn3Gb6XUVZPs9d8VV1SShLDVufoSMkneGuXSUtU4bYEDHs0CQIDAQAB
MS=ms45582805
v=spf1 ip4:91.215.162.220 ip4:94.189.16.170 include:_spf.createsend.com include:spf.mailanyone.net include:emsd1.com include:spf.protection.outlook.com include:web.shared.mysmtp.com -all

✉️ SPF#

Policy	Record (crescendo.dk)
-all (hard fail)	v=spf1 ip4:91.215.162.220 ip4:94.189.16.170 include:_spf.createsend.com include:spf.mailanyone.net include:emsd1.com include:spf.protection.outlook.com include:web.shared.mysmtp.com -all

📨 DMARC#

Policy	Record (_dmarc.crescendo.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:jf@crescendo.dk; ruf=mailto:jf@crescendo.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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 19:40:55

www CNAME	crescendo-frontend-ppunh.ondigitalocean.app (all on ondigitalocean.app) → 162.159.140.98 172.66.0.96 2606:4700:7::60 2a06:98c1:58::60 (AS13335)
www vs bare domain	Different networks crescendo.dk: 142.93.129.186 (AS14061) www.crescendo.dk: 162.159.140.98 172.66.0.96 2606:4700:7::60 2a06:98c1:58::60 (AS13335) (all like this)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u5958487.wl238.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u5958487.wl238.sendgrid.net	RSA · ~1024 bit below 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: 8/10 · policy: -all

warn 8 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

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

🔐 DNSSEC#

99ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026073101
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-11 07:49:44

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1998-07-20
Expires	2030-09-30 (1442d)

📋 WHOIS#

⏱️ Lookup Timing#

76ms

44ms

62ms

AAAA

67ms

TXT

189ms

CAA

49ms

HTTPS

48ms

TLSA

639ms

SOA

0ms

MTA-STS

89ms

DNSSEC

99ms

SRV

103ms

Total

1766ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 16:22:10	1485ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 16:06:56	1202ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-03 18:02:43	1115ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-29 09:52:48	1319ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-28 04:30:29	1877ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-06 04:05:09 shown	1766ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-14 11:18:13	5330ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-30 20:15:00	729ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 19:39:24	661ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-21 10:38:34	1231ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-20 23:00:52	1101ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 22:55:58	1080ms	2 NS 1 A 1 MX	🔒 Secure