sischool.dk

📜 Historical scan 2026-09-16 08:25:57 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sischool.dk is a .dk domain served by 2 nameservers (bella.ns.cloudflare.com, mark.ns.cloudflare.com). It was registered on 12 October 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.4.105 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by sischool-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 30ms

Nameserver	IP addresses	PTR	ASN / ISP
bella.ns.cloudflare.com	108.162.192.74 172.64.32.74 173.245.58.74 2606:4700:50::adf5:3a4a 2803:f800:50::6ca2:c04a 2a06:98c1:50::ac40:204a	bella.ns.cloudflare.com bella.ns.cloudflare.com bella.ns.cloudflare.com bella.ns.cloudflare.com bella.ns.cloudflare.com bella.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
mark.ns.cloudflare.com	108.162.193.130 172.64.33.130 173.245.59.130 2606:4700:58::adf5:3b82 2803:f800:50::6ca2:c182 2a06:98c1:50::ac40:2182	mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com mark.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.4.105	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.131.252	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 41ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	sischool-dk.mail.protection.outlook.com	2a01:111:f403:ca04::9 2a01:111:f403:ca09::a 2a01:111:f403:ca21::a 2a01:111:f403:ca48::10 52.101.185.114 52.101.185.21 52.101.68.12 52.101.91.153	mail-db7pr03cu00601.inbound.protection.outlook.com mail-am7pr02cu00202.inbound.protection.outlook.com mail-maspr04cu00102.inbound.protection.outlook.com mail-miypr05cu00100.inbound.protection.outlook.com mail-zrxpr04cu00102.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-matpr04cu00101.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 → 40.104.116.24

🔷 AAAA Records (IPv6)#

2 records 40ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:83fc	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3033::6815:469	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 51ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.4.105,172.67.131.252 ech=AEX+DQBB6gAgACCFX7ZFNCYh9mu2n8DcCyzUX4RQnDlKBt0M15kL8feLPAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:83fc,2606:4700:3033::6815:469

🔌 SRV Records#

1 records 74ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

6 records 168ms

TXT Record
/cV6bvF8GaGBFcimvt59mbrF3ybF6TRj8YA85I+kEeA=
cisco-ci-domain-verification=6a9fcc392afd82be6778242246366368cdf4c2d5d7f7fd7aa5fac5c9d1107c42
K+FILDvfV1WjW7VwdQKwiLWde1imO8sIDgFu/zFo27+G0t8G1rZ3l6vhpoyFA1lqz+IyTbEG2gUD9gChDlq/Xw==
MS=ms76582345
uvmid=280202
v=spf1 ip4:46.32.40.41 ip4:94.138.76.52 ip4:94.138.76.44 ip4:89.184.150.166 ip4:94.138.77.92 ip4:94.138.76.180 ip4:212.37.142.20 ip4:212.37.142.28 ip4:89.221.167.132 ip4:185.16.17.219 ip4:185.16.17.220 ip4:195.231.242.115 ip4:40.118.61.36 a:massmail.scannet.dk include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (sischool.dk)
-all (hard fail)	v=spf1 ip4:46.32.40.41 ip4:94.138.76.52 ip4:94.138.76.44 ip4:89.184.150.166 ip4:94.138.77.92 ip4:94.138.76.180 ip4:212.37.142.20 ip4:212.37.142.28 ip4:89.221.167.132 ip4:185.16.17.219 ip4:185.16.17.220 ip4:195.231.242.115 ip4:40.118.61.36 a:massmail.scannet.dk include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.sischool.dk)
p=none (monitor only)	v=DMARC1;p=none;sp=reject;pct=100;rua=mailto:DMARC@sischool.dk;ruf=mailto:DMARC@sischool.dk;ri=86400;aspf=r;adkim=r;fo=1

📬 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 05:44:41

www	104.21.4.105 172.67.131.252 2606:4700:3030::ac43:83fc 2606:4700:3033::6815:469 (AS13335) (address records, no CNAME)
www vs bare domain	Same network sischool.dk: 104.21.4.105 172.67.131.252 2606:4700:3030::ac43:83fc 2606:4700:3033::6815:469 (AS13335) www.sischool.dk: 104.21.4.105 172.67.131.252 2606:4700:3030::ac43:83fc 2606:4700:3033::6815:469 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-sischool-dk._domainkey.elevcampus.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-sischool-dk._domainkey.elevcampus.onmicrosoft.com	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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

117ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2414880179
Primary NS (MNAME)	bella.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-04 00:35:26

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-10-12
Expires	2026-10-31 (13d)

📋 WHOIS#

⏱️ Lookup Timing#

30ms

44ms

41ms

AAAA

40ms

TXT

168ms

CAA

31ms

HTTPS

51ms

TLSA

840ms

SOA

0ms

MTA-STS

80ms

DNSSEC

117ms

SRV

74ms

Total

1690ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 00:10:27	1294ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-29 23:46:50	969ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-26 22:50:03	826ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-16 08:25:57 shown	1690ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-05 13:51:52	1366ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-12 10:13:17	1622ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-05 21:57:40	3311ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-20 05:43:31	9372ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-19 00:10:21	1405ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-26 17:40:16	1049ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-25 13:59:54	1144ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-20 17:04:15	1955ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-18 02:11:34	1230ms	2 NS 2 A 1 MX	🔒 Secure