coretools.dk - dns.ninja
coretools.dk
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 193.8.38.10🇩🇰 team-blue-denmark193.8.38.0/24 Group Online A/S - tb | ||||||
| NS | ns1.simply.com ⭐ | ||||||
| A | 2a02:2339:1:15c::4562:4562🇩🇰 team-blue-denmark2a02:2339::/36 | ||||||
| PTR | ns1.simply.com | ||||||
| A | 91.197.248.78🇩🇰 team-blue-denmark91.197.248.0/22 | ||||||
| PTR | ns1.simply.com | ||||||
| NS | ns2.simply.com | ||||||
| A | 2a02:2339:4006:101::4562:4562🇩🇰 team-blue-denmark2a02:2339:4000::/34 | ||||||
| PTR | ns2.simply.com | ||||||
| A | 185.25.141.15🇩🇰 team-blue-denmark185.25.141.0/24 Zitcom A/S | ||||||
| PTR | ns2.simply.com | ||||||
| NS | ns3.simply.com | ||||||
| A | 91.197.248.79🇩🇰 team-blue-denmark91.197.248.0/22 | ||||||
| PTR | ns3.simply.com | ||||||
| NS | ns4.simply.com | ||||||
| A | 91.197.248.80🇩🇰 team-blue-denmark91.197.248.0/22 | ||||||
| PTR | ns4.simply.com | ||||||
| MX | mx1.onlinemail.io ⭐ | ||||||
| A | 185.21.42.12🇩🇰 team-blue-denmark185.21.40.0/22 ZITCOM A/S | ||||||
| PTR | mx1.onlinemail.io | ||||||
| MX | mx2.onlinemail.io ⭐ | ||||||
| A | 46.36.208.16🇩🇰 team-blue-denmark46.36.208.0/21 | ||||||
| PTR | mx2.onlinemail.io | ||||||
| TXT | v=spf1 a include:spf.curanet.dk include:spf.simply.com -all | ||||||
| SOA | ns1.simply.comhostmaster@simply.com 2025-10-14 #4 | ||||||
dk
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | b.nic.dk ⭐ | ||||||
| NS | c.nic.dk | ||||||
| NS | h.nic.dk | ||||||
| NS | l.nic.dk | ||||||
| NS | s.nic.dk | ||||||
| NS | t.nic.dk | ||||||
| TXT | DK zone updateEpoch 1785507661localtime Fri Jul 31 16:21:01 2026gmtime Fri Ju... | ||||||
| SOA | b.nic.dktech@punktum.dk serial=1785507661 | ||||||
Same first word
Similar names
DNS History
18 records (7 active, 11 former)
○NSns01.one.com2015-07-06 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
○NSns02.one.com2015-07-06 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
●NSns1.simply.com2026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
●NSns2.simply.com2026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
●NSns3.simply.com2026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
●NSns4.simply.com2026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
●MXmx1.onlinemail.io2026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
○MXmx1.pub.mailpod8-cph3.one.com2020-01-11 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
●MXmx2.onlinemail.io2026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
○MXmx2.pub.mailpod8-cph3.one.com2020-01-11 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
○MXmx3.pub.mailpod8-cph3.one.com2020-01-11 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
○MXmxcluster1.one.com2015-07-06 → 2017-03-13 · 4 obs
● 2017-03-13 04:53:56
○ 2020-01-11 13:43:42
○ 2026-07-31 14:43:12
○MXmxcluster2.one.com2015-07-06 → 2017-03-13 · 4 obs
● 2017-03-13 04:53:56
○ 2020-01-11 13:43:42
○ 2026-07-31 14:43:12
●A193.8.38.102026-02-15 → 2026-07-31 · 3 obs
● 2026-02-15 22:33:38
● 2026-07-31 14:43:12
○A2a02:2350:5:105:5140:0:a00d:1ae62020-01-11 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
○A46.30.212.2542015-07-06 → 2016-05-09 · 4 obs
● 2016-05-09 08:26:08
○ 2017-03-13 04:53:56
○ 2026-07-31 14:43:12
○A46.30.213.1932017-03-13 → 2017-03-13 · 4 obs
● 2017-03-13 04:53:56
○ 2020-01-11 13:43:42
○ 2026-07-31 14:43:12
○A46.30.215.692020-01-11 → 2020-01-11 · 4 obs
● 2020-01-11 13:43:42
○ 2026-02-15 22:33:38
○ 2026-07-31 14:43:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| dk | t.nic.dk, b.nic.dk, c.nic.dk, h.nic.dk... | - |
| coretools.dk | ns4.simply.com, ns3.simply.com, ns1.simply.com, ns2.simply.com | - |
✅ Authoritative Response
Server:185.25.141.15
NS records: ns4.simply.com, ns3.simply.com, ns1.simply.com, ns2.simply.com
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 987ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 193.8.38.10 |
| NS | 4 | ns3.simply.com, ns4.simply.com... |
| MX | 2 | mx2.onlinemail.io (pri: 10), mx1.onlinemail.io (pri: 10) |
| TXT | 1 | v=spf1 a include:spf.curanet.dk include: |
| SOA | 1 | ns1.simply.com hostmaster.simply.com |
Analysis
IP Addresses
coretools.dk resolves to just one IP address, 193.8.38.10.
Two other host names, along with mail.nyborgbegravelsesforretning.dk, bsm-production.dk and aabh.dk, also share IP numbers with coretools.dk.
Name Servers
The NS records for coretools.dk point to four name servers: ns1.simply.com, ns2.simply.com, ns3.simply.com and ns4.simply.com.
coretools.dk partially shares its NS delegation with several other domains, including danskmodetextil.com, badhabit.dk, houseofmartens.se and two others.
The name servers ns1.unoeuro.com, ns2.unoeuro.com, ns3.unoeuro.com and ns4.unoeuro.com are often found in use alongside these name servers.
Host names that have two IP addresses:
The A records for ns1.simply.com return 91.197.248.78 and 2a02:2339:1:15c::4562:4562.
The A records for ns2.simply.com return 185.25.141.15 and 2a02:2339:4006:101::4562:4562.
Host names that point to one IP address:
ns3.simply.com resolves to the IP address 91.197.248.79.
ns4.simply.com resolves to the IP address 91.197.248.80.
Mail Servers
coretools.dk is served by two mail servers, mx1.onlinemail.io and mx2.onlinemail.io.
Among the domains sharing a mail server setup with coretools.dk are humleauto.dk, ftuarkiv.dk, ordrupgaarden.dk and two others.
There is at least a partial MX overlap between coretools.dk and other domains, including joench.dk, photografica.com, stoned.dk and two others.
mx1.onlinemail.io resolves to 185.21.42.12. mx2.onlinemail.io resolves to 46.36.208.16. Both host names point to a single IP number.