isby.dk

📜 Historical scan 2026-06-17 21:55:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

isby.dk is a .dk domain served by 2 nameservers (ns1.arrownet.dk, ns2.arrownet.dk). It was registered on 30 June 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx.danskkabeltv.dk. The zone is not DNSSEC-signed, 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 188ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.arrownet.dk	62.61.130.2	ns1.arrownet.dk	AS15516 DKTV A/S
ns2.arrownet.dk	62.61.131.2	ns2.arrownet.dk	AS15516 DKTV A/S

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 164ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx.danskkabeltv.dk	62.61.141.2 62.61.141.3 62.61.141.5 62.61.141.6 62.61.141.7 62.61.141.8	mx-01.dk-tv.net mx-02.dk-tv.net mx-04.dk-tv.net mx-05.dk-tv.net mx-06.dk-tv.net mx-07.dk-tv.net	AS15516 DKTV A/S AS15516 DKTV A/S AS15516 DKTV A/S AS15516 DKTV A/S AS15516 DKTV A/S AS15516 DKTV A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	cust-www1.arrownet.dk → 62.61.131.6
🔶 Autoconfig	cust-www1.arrownet.dk → 62.61.131.6

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 408ms

TXT Record
v=spf1 include:_spf-customer.dk-tv.net

✉️ SPF#

Policy	Record (isby.dk)
no all — incomplete SPF	v=spf1 include:_spf-customer.dk-tv.net

📨 DMARC#

Policy	Record (_dmarc.isby.dk)
p=reject	v=DMARC1;p=reject;sp=reject;fo=1;ri=3600;pct=100;rua=mailto:report@dmarc.dk-tv.net;ruf=mailto:failure@dmarc.dk-tv.net

📬 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 2026-10-12 02:57:57

www CNAME	cust-www1.arrownet.dk (all on arrownet.dk) → 62.61.131.6 (AS15516)
www vs bare domain	Only www resolves isby.dk: no address www.isby.dk: 62.61.131.6 (AS15516) (all like this)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
dkim	—	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: 3/10 · policy: none

warn No "all" and no redirect: mail from unlisted servers gets a neutral result

🔗 TLSA / DANE#

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

🔐 DNSSEC#

239ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

205ms

Field	Value
Serial	2017042407
Primary NS (MNAME)	ns.arrownet.dk
Responsible (RNAME)	hostmaster@arrownet.dk
Refresh	600s
Retry	3600s
Expire	3600000s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-14 17:12:16

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2005-06-30
Expires	2027-06-30 (253d)

🔗 Same registrant#

48 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
285-0.dk	Punktum dk A/S (direct)
aalstruphus.dk	Simply.com A/S
abkvintus.dk	Punktum dk A/S (direct)
ablindeparken.dk	Punktum dk A/S (direct)
afd133.dk	Punktum dk A/S (direct)
afd140.dk	Punktum dk A/S (direct)
afd5k.dk	Punktum dk A/S (direct)
aggersvoldhus.dk	Punktum dk A/S (direct)
allg.dk	Punktum dk A/S (direct)
aplus.dk	Punktum dk A/S (direct)
arrownet.dk	Punktum dk A/S (direct)
bbb17.dk	Punktum dk A/S (direct)
blokhaven.dk	Punktum dk A/S (direct)
blokland.dk	Punktum dk A/S (direct)
boegehegnet.dk	Punktum dk A/S (direct)
comx.dk	Punktum dk A/S (direct)
comxnet.dk	Punktum dk A/S (direct)
cxnet.dk	Punktum dk A/S (direct)
danskkabeltv.dk	Punktum dk A/S (direct)
dgaard.dk	Punktum dk A/S (direct)
dktv-service.dk	Punktum dk A/S (direct)
dktvanlaeg.dk	Punktum dk A/S (direct)
dktvmail.dk	Punktum dk A/S (direct)
etbrev.dk	Punktum dk A/S (direct)
falkoner-kollegiet.dk	Punktum dk A/S (direct)
fasanen-ab.dk	Punktum dk A/S (direct)
fascom.dk	Punktum dk A/S (direct)
fortbonet.dk	Punktum dk A/S (direct)
gyldenrisparken.dk	Punktum dk A/S (direct)
hareskovgaard-net.dk	Punktum dk A/S (direct)
hedenet.dk	Punktum dk A/S (direct)
hyperconnect.dk	Punktum dk A/S (direct)
i-connect.dk	Punktum dk A/S (direct)
ik-dan.dk	Punktum dk A/S (direct)
kaerskiftevej.dk	Punktum dk A/S (direct)
mail-mee.dk	Punktum dk A/S (direct)
mailone.dk	Punktum dk A/S (direct)
netbrev.dk	Punktum dk A/S (direct)
post-mee.dk	Punktum dk A/S (direct)
postlet.dk	Punktum dk A/S (direct)
rbparken.dk	Punktum dk A/S (direct)
sikringdktv.dk	Punktum dk A/S (direct)
skovbaeltet.dk	Punktum dk A/S (direct)
tdc-alarmnet.dk	Punktum dk A/S (direct)
telelet.dk	Punktum dk A/S (direct)
va-banehegnet.dk	Punktum dk A/S (direct)
vedfortet.dk	Punktum dk A/S (direct)
webskoven.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

188ms

185ms

164ms

AAAA

179ms

TXT

408ms

CAA

179ms

HTTPS

163ms

TLSA

125ms

SOA

205ms

MTA-STS

271ms

DNSSEC

239ms

SRV

268ms

Total

4052ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-04 14:44:32	1124ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-24 23:51:56	2779ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-18 22:39:43	949ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-17 21:55:36 shown	4052ms	2 NS 0 A 1 MX	🔓 Insecure