isp4u.dk DNS records

🖥️ Nameservers3 records 15ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.e-studio.dk	195.242.131.5 2001:67c:564:fffc::11	ns1.e-studio.dk ns1.e-studio.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.e-studio.dk	2a00:1b18:2:3::2 62.69.152.34	ns2.e-studio.dk ns2.e-studio.dk	AS47527 DLX A/S AS47527 DLX A/S
ns3.e-studio.dk	193.200.90.183 2001:67c:564:fffc::13	ns3.e-studio.dk ns3.e-studio.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS

🌍 A Records1 records 21ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
77.68.151.224	3600s	—	AS39642	Sinal A/S	77.68.128.0/17	🇩🇰 Denmark	Nørresundby

📧 MX Records5 records 24ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mail.isp4u.dk	193.200.90.180	web8.e-studio.dk	AS62121 Christian Ebsen ApS
10	300s	mx4.spamfri.dk	193.200.91.108 2001:67c:564:fffd::4001	mx4.spamfri.dk mx4.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
20	300s	mx2.spamfri.dk	193.200.91.109 2001:67c:564:fffd::2001	mx2.spamfri.dk mx2.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
30	300s	mx3.spamfri.dk	2a00:1b18:2:3:fe::2 62.69.152.43 62.69.152.43	mx3.spamfri.dk 43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk	AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S
40	300s	mx1.spamfri.dk	195.242.131.16 2001:67c:564:fffd::1001	mx1.spamfri.dk mx1.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	193.200.90.180
🔶 Autoconfig	193.200.90.180

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 30ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	0	443	cpanelemaildiscovery.cpanel.net

📝 TXT Records1 records 80ms

TXT Record
v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk ~all

✉️ SPF

Policy	Record (isp4u.dk)
~all (soft fail)	v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk ~all

📨 DMARC

Policy	Record (_dmarc.isp4u.dk)
p=none (monitor only)	v=DMARC1;p=none; sp=none; adkim=s; aspf=s

📬 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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.isp4u.dk	OKIDhNHtfDyOU6vTwvd9I2YJnEoFXG5uUyNzApgND_M

🔗 TLSA / DANE4 records 69ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.spamfri.dk	DANE-EE · SPKI · SHA-256	884451547A03D0AC2F628D943839BAA6…
SMTP _25._tcp.mx2.spamfri.dk	DANE-EE · SPKI · SHA-256	6598C93F79B95376BB8099E9AC862167…
SMTP _25._tcp.mx3.spamfri.dk	DANE-EE · SPKI · SHA-256	BBFB0694919290E5BC9D6E2C6F47D846…
SMTP _25._tcp.mx4.spamfri.dk	DANE-EE · SPKI · SHA-256	4EE743A99328AEF5142706CA5FD3AD61…

🔐 DNSSEC98ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2026083105
Primary NS (MNAME)	ns1.e-studio.dk
Responsible (RNAME)	hostmaster@mailrelay.e-studio.dk
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

15ms

A

21ms

MX

24ms

AAAA

25ms

TXT

80ms

CAA

20ms

HTTPS

13ms

TLSA

69ms

SOA

0ms

MTA-STS

32ms

DNSSEC

98ms

SRV

30ms

Total

631ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 19:46:50	631ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-30 06:03:40	2350ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-28 21:41:09	691ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-27 19:49:46	750ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-26 17:57:21	1067ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-25 11:01:44	2201ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-24 10:53:01	1322ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-23 07:56:50	9948ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-22 07:42:37	8566ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-21 07:26:02	3332ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-20 07:01:45	9389ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-19 05:50:12	4752ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-18 04:17:49	8227ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-16 06:09:32	6501ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-14 02:04:29	1286ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-10 20:40:13	1808ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-09 12:20:27	1435ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-06 18:19:12	10437ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-08-03 22:20:02	1321ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-07-31 15:31:48	1181ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-07-29 16:06:12	1538ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-07-27 13:53:51	25250ms	3 NS 1 A 5 MX	❓ Unknown	View
2026-07-26 13:29:51	9192ms	3 NS 1 A 5 MX	❓ Unknown	View
2026-07-25 12:57:27	1364ms	3 NS 1 A 5 MX	🔓 Insecure	View
2026-07-24 12:26:43	2134ms	3 NS 1 A 5 MX	🔓 Insecure	View