koert.nu - robtex.com
koert.nu
| DNSSEC | ⚠️ Not signed | ||||||
| A | 188.166.131.75🇳🇱 DIGITALOCEAN188.166.128.0/22 DigitalOcean | ||||||
| NS | ns1.sectigoweb.com ⭐ | ||||||
| A | 2400:cb00:2049:1::a29f:1804🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| PTR | ns1.dnsimple.com | ||||||
| A | 162.159.24.4Cloudflare162.159.24.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ns1.dnsimple.com | ||||||
| NS | ns2.sectigoweb.com | ||||||
| A | 2620:111:8005::53🇺🇸 AS327712620:111:8005::/48 Vultr Customer Route | ||||||
| A | 199.247.153.53🇺🇸 AS32771199.247.153.0/24 Vultr Customer Route | ||||||
| NS | ns3.sectigoweb.com | ||||||
| A | 2400:cb00:2049:1::a29f:1a04🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street | ||||||
| PTR | ns3.dnsimple.com | ||||||
| A | 162.159.26.4Cloudflare162.159.26.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ns3.dnsimple.com | ||||||
| NS | ns4.sectigoweb.com | ||||||
| A | 2620:111:8007::53🇺🇸 AS327712620:111:8007::/48 Vultr Customer Route | ||||||
| A | 199.247.155.53🇺🇸 AS32771199.247.155.0/24 Vultr Customer Route | ||||||
| MX | mail.koert.nu ⭐ | ||||||
| A | 109.70.7.233🇳🇱 CLDIN-NL109.70.0.0/21 | ||||||
| PTR | srv2.nc-websites.nl | ||||||
| TXT | v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrLHiExVd55zd/IQ/J/mR... | ||||||
| TXT | v=spf1 a mx ip4:146.185.182.187 ip4:141.193.32.12 ip4:188.166.131.75 include:... | ||||||
| SOA | ns1.sectigoweb.comadmin@sectigo.com serial=1674848083 | ||||||
nu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | catcher-in-the-rye.nic.nu ⭐ | ||||||
| NS | a.ns.nu | ||||||
| NS | c.ns.nu | ||||||
| NS | d.ns.nu | ||||||
| NS | m.ns.nu | ||||||
| NS | y.ns.nu | ||||||
| NS | z.ns.nu | ||||||
| TXT | NU zone update: 2026-05-12 00:39:17 +0000 (EPOCH 1778546357) (auto) | ||||||
| TXT | id:05d6b413-19c4-42bc-b158-eda4c09d2706 | ||||||
| SOA | catcher-in-the-rye.nic.nuhostmaster@nic.nu serial=1778546411 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSns1.sectigoweb.com2026-05-04 → 2026-05-12 · 2 obs
● 2026-05-12 01:13:18
●NSns2.sectigoweb.com2026-05-04 → 2026-05-12 · 2 obs
● 2026-05-12 01:13:18
●NSns3.sectigoweb.com2026-05-04 → 2026-05-12 · 2 obs
● 2026-05-12 01:13:18
●NSns4.sectigoweb.com2026-05-04 → 2026-05-12 · 2 obs
● 2026-05-12 01:13:18
●MXmail.koert.nu2026-05-04 → 2026-05-12 · 2 obs
● 2026-05-12 01:13:18
●A188.166.131.752026-05-04 → 2026-05-12 · 2 obs
● 2026-05-12 01:13:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| nu | a.ns.nu, c.ns.nu, d.ns.nu, m.ns.nu... | 12 records |
| koert.nu | ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com, ns4.sectigoweb.com | - |
✅ Authoritative Response
Server:162.159.24.4
NS records: ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com, ns4.sectigoweb.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for koert.nu (unsigned zone)
⏱️ Timing
Total: 2308ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 188.166.131.75 |
| NS | 4 | ns1.sectigoweb.com, ns2.sectigoweb.com... |
| MX | 1 | mail.koert.nu (pri: 10) |
| TXT | 2 | v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQ, v=spf1 a mx ip4:146.185.182.187 ip4:141. |
| SOA | 1 | ns1.sectigoweb.com admin.sectigo.com |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.ns.nu, c.ns.nu, d.ns.nu...)
Analysis
IP Addresses
koert.nu points to a single IP number: 188.166.131.75.
Other host names, for instance ubsnv.nl, www.hiephiepkado.nl, www.xenia.be, laparada.nl and worldpresent.nl share IP numbers with koert.nu.
Name Servers
koert.nu is delegated to four name servers: ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com and ns4.sectigoweb.com.
koert.nu shares name servers with other domains at least partially, for instance vanvlietsloopwerken.nl, windowdressing.nl, mesologie.nl, repnam.com and bmoautomation.nl.
Host names with two IP numbers:
ns1.sectigoweb.com resolves to 2400:cb00:2049:1::a29f:1804 and 162.159.24.4.
ns2.sectigoweb.com resolves to 2620:111:8005::53 and 199.247.153.53.
ns3.sectigoweb.com resolves to 2400:cb00:2049:1::a29f:1a04 and 162.159.26.4.
ns4.sectigoweb.com resolves to 2620:111:8007::53 and 199.247.155.53.
Mail Servers
The mail server for koert.nu is mail.koert.nu.
Host name mail.koert.nu resolves to IP 109.70.7.233.