academicbooks.dk

📜 Historical scan 2026-09-23 15:07:39 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

academicbooks.dk is a .dk domain served by 2 nameservers (lee.ns.cloudflare.com, phoenix.ns.cloudflare.com). It was registered on 15 January 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.40.22 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by academicbooks-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 38ms

Nameserver	IP addresses	PTR	ASN / ISP
lee.ns.cloudflare.com	108.162.193.129 172.64.33.129 173.245.59.129 2606:4700:58::adf5:3b81 2803:f800:50::6ca2:c181 2a06:98c1:50::ac40:2181	lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com lee.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
phoenix.ns.cloudflare.com	108.162.194.201 162.159.38.201 172.64.34.201 2606:4700:50::a29f:26c9 2803:f800:50::6ca2:c2c9 2a06:98c1:50::ac40:22c9	phoenix.ns.cloudflare.com phoenix.ns.cloudflare.com phoenix.ns.cloudflare.com phoenix.ns.cloudflare.com phoenix.ns.cloudflare.com phoenix.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 33ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.40.22	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.174.148	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 38ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	academicbooks-dk.mail.protection.outlook.com	2a01:111:f403:ca3c::6 2a01:111:f403:ca3c::a 2a01:111:f403:ca48::12 2a01:111:f403:ca48::a 52.101.181.156 52.101.185.114 52.101.209.153 52.101.91.159	mail-zrxpr04cu00106.inbound.protection.outlook.com mail-zrxpr07cu00102.inbound.protection.outlook.com mail-miypr05cu00202.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-wa4pr05cu00104.inbound.protection.outlook.com mail-zrxpr04cu00102.inbound.protection.outlook.com mail-cpjpr04cu00101.inbound.protection.outlook.com mail-matpr04cu00207.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 → 40.104.116.40

🔷 AAAA Records (IPv6)#

2 records 40ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::ac43:ae94	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:2816	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 53ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.40.22,172.67.174.148 ech=AEX+DQBBxQAgACDrycxHIbtbRFPj3PVyptXjvVD5nJu6aN8PBZoDNdNbWQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:ae94,2606:4700:3034::6815:2816

🔌 SRV Records#

1 records 78ms

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

📝 TXT Records#

5 records 208ms

TXT Record
apple-domain-verification=rUlkbk1jSUbfMnxS
google-site-verification=gZqbiqV9uYWuScsHSWUThWKP7ywOq47knAmBnW3J7oE
google-site-verification=RGp4U00Bs2InuFY4X4cY6BWwnMJz5bngazyYNrlH7gc
MS=ms92932091
v=spf1 ip4:192.38.111.162/28 ip4:212.97.211.166/27 include:bounce.peytz.dk include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (academicbooks.dk)
-all (hard fail)	v=spf1 ip4:192.38.111.162/28 ip4:212.97.211.166/27 include:bounce.peytz.dk include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.academicbooks.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:slfondendmarc@gmail.com,mailto:dmarc_agg@vali.email; ruf=mailto:slfondendmarc@gmail.com; sp=none; aspf=r;

📬 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 2026-10-16 08:15:37

www	104.26.0.132 104.26.1.132 172.67.74.149 2606:4700:20::681a:184 2606:4700:20::681a:84 2606:4700:20::ac43:4a95 (AS13335) (address records, no CNAME)
www vs bare domain	Same network academicbooks.dk: 104.26.0.132 104.26.1.132 172.67.74.149 2606:4700:20::681a:184 (AS13335) www.academicbooks.dk: 104.26.0.132 104.26.1.132 172.67.74.149 2606:4700:20::681a:184 (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#

3 found

Selector	CNAME	Key
s1	s1.domainkey.u14178468.wl219.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u14178468.wl219.sendgrid.net	RSA · ~1024 bit below 2048 bit
selector2	selector2-academicbooks-dk._domainkey.slfonden.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

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.academicbooks.dk	fjlB_A_g3gxJO1ERe6lbhtOGc4GlQExRowFH3a6o1yo
TXT	_acme-challenge.academicbooks.dk	z351sG6SuCMOj_8FAmt4g5h-IZ8yv2-CLfFV-7qaKJQ

🔗 TLSA / DANE#

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

🔐 DNSSEC#

63ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2414829243
Primary NS (MNAME)	lee.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-06 17:58:21

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2010-01-15
Expires	2027-05-31 (226d)

📋 WHOIS#

⏱️ Lookup Timing#

38ms

33ms

38ms

AAAA

40ms

TXT

208ms

CAA

43ms

HTTPS

53ms

TLSA

615ms

SOA

0ms

MTA-STS

58ms

DNSSEC

63ms

SRV

78ms

Total

1277ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 08:15:37	1951ms	2 NS 3 A 1 MX	🔒 Secure
2026-10-07 17:51:04	3878ms	2 NS 3 A 1 MX	🔒 Secure
2026-10-06 17:46:31	3705ms	2 NS 3 A 1 MX	🔒 Secure
2026-10-05 16:45:19	3938ms	2 NS 3 A 1 MX	🔒 Secure
2026-10-03 16:33:53	1135ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-23 15:07:39 shown	1277ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-23 09:30:52	2923ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-21 03:26:26	2060ms	2 NS 2 A 1 MX	🔒 Secure
2026-09-14 01:12:02	2035ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-20 22:12:21	11697ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-18 17:39:08	3949ms	2 NS 2 A 1 MX	🔒 Secure
2026-08-09 18:11:07	1895ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-27 01:29:13	17975ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-16 02:28:08	1905ms	2 NS 2 A 1 MX	🔒 Secure
2026-07-03 20:01:40	6268ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-25 13:31:27	2880ms	2 NS 2 A 1 MX	🔒 Secure
2026-06-22 10:48:03	1170ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 07:34:26	9485ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 12:37:02	1689ms	2 NS 1 A 1 MX	🔒 Secure