surfsup.dk

📜 Historical scan 2026-06-17 14:41:34 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

surfsup.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 76.76.21.21 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. 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 92ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 96ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
76.76.21.21	—	—	AS16509	Amazon.com, Inc.	76.76.21.0/24	🇺🇸 United States	Walnut

📧 MX Records#

5 records 87ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	—	aspmx.l.google.com	173.194.73.26 2a00:1450:4010:c1e::1a	lq-in-f26.1e100.net lb-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	—	alt1.aspmx.l.google.com	192.178.211.27 2404:6800:4000:1025::1b	lcbomp-in-f27.1e100.net lcbomp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	—	alt2.aspmx.l.google.com	108.177.125.26 2404:6800:4008:c01::1a	tp-in-f26.1e100.net tp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	—	alt3.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1a	tp-in-f27.1e100.net tp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	—	alt4.aspmx.l.google.com	173.194.43.27 2607:f8b0:400e:c1e::1b	yudlsqd-in-f27.1e100.net yudlsqd-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 327ms

TXT Record
ca3-8bff1dbbfb9c45e789f0a25622810aa0
google-site-verification=cYyAgbnqZrqdZWL4jqm7YNcnmws63tw_0kc3WZfJKqo
stripe-verification=0b9fde8762b12d6f7e57182503c7e2e5ff778ff726ecb3cf217f01dd326f86b2

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

Policy	Record (_dmarc.surfsup.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:kontakt@surfsup.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 2026-10-09 15:02:47

www CNAME	cname.vercel-dns.com (all on vercel-dns.com) → 66.33.60.193 76.76.21.241 (AS16509)
www vs bare domain	Same network surfsup.dk: 76.76.21.21 (AS16509) www.surfsup.dk: 66.33.60.193 76.76.21.241 (AS16509)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u39472394.wl145.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u39472394.wl145.sendgrid.net	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.

🔗 TLSA / DANE#

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

🔐 DNSSEC#

204ms

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

🏷️ SOA#

86ms

Field	Value
Serial	2025111001
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

92ms

96ms

87ms

AAAA

86ms

TXT

327ms

CAA

100ms

HTTPS

96ms

TLSA

93ms

SOA

86ms

MTA-STS

36ms

DNSSEC

204ms

SRV

0ms

Total

1653ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-08-26 12:44:46	1169ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-25 12:56:12	815ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-23 13:47:22	1065ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 14:41:34 shown	1653ms	2 NS 1 A 5 MX	🔒 Secure