istructor.com - robtex.com
istructor.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 5.157.84.150🇳🇱 CLDIN-NL5.157.80.0/21 | ||||||
| PTR | redirect.server40.firstfind.nl | ||||||
| NS | ns3.firstfind.nl ⭐ | ||||||
| A | 2a01:b940:1057::53🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING | ||||||
| PTR | ns3.firstfind.nl | ||||||
| A | 5.157.86.222🇳🇱 CLDIN-NL5.157.80.0/21 | ||||||
| PTR | ns3.firstfind.nl | ||||||
| NS | ns4.firstfind.nl | ||||||
| A | 2a01:b940:1057::54🇳🇱 CLDIN-NL2a01:b940::/29 YOURHOSTING | ||||||
| A | 5.157.87.222🇳🇱 CLDIN-NL5.157.80.0/21 | ||||||
| PTR | ns4.firstfind.nl | ||||||
| NS | ns5.firstfind.net | ||||||
| A | 2a03:b0c0:2:d0::1183:f001🇳🇱 DIGITALOCEAN2a03:b0c0:2::/48 DigitalOcean | ||||||
| PTR | ns5.firstfind.net | ||||||
| A | 178.128.248.2🇳🇱 DIGITALOCEAN178.128.240.0/20 DigitalOcean | ||||||
| PTR | ns5.firstfind.net | ||||||
| MX | server40.firstfind.nl ⭐ | ||||||
| A | 5.157.84.149🇳🇱 CLDIN-NL5.157.80.0/21 | ||||||
| PTR | server40.firstfind.nl | ||||||
| SOA | ns3.firstfind.nlhostmaster@firstfind.nl 2016-07-12 #0 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774647827 | ||||||
Same first word
istructor.com |
DNS History
8 records (5 active, 3 former)
●NSns3.firstfind.nl2016-09-24 → 2026-03-27 · 2 obs
● 2026-03-27 21:58:44
●NSns4.firstfind.nl2016-09-24 → 2026-03-27 · 2 obs
● 2026-03-27 21:58:44
●NSns5.firstfind.net2016-09-24 → 2026-03-27 · 2 obs
● 2026-03-27 21:58:44
○MXmx1.firstfind.nl2016-09-24 → 2017-11-26 · 4 obs
● 2017-11-26 12:14:42
○ 2026-02-27 09:40:16
○ 2026-03-27 21:58:44
○MXmx2.firstfind.nl2016-09-24 → 2017-11-26 · 4 obs
● 2017-11-26 12:14:42
○ 2026-02-27 09:40:16
○ 2026-03-27 21:58:44
●MXserver40.firstfind.nl2016-09-24 → 2026-03-27 · 2 obs
● 2026-03-27 21:58:44
○A109.235.74.1582016-09-24 → 2017-11-26 · 4 obs
● 2017-11-26 12:14:42
○ 2026-02-27 09:40:16
○ 2026-03-27 21:58:44
●A5.157.84.1502026-02-27 → 2026-03-27 · 3 obs
● 2026-02-27 09:40:16
● 2026-03-27 21:58:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| istructor.com | ns4.firstfind.nl, ns3.firstfind.nl, ns5.firstfind.net | - |
✅ Authoritative Response
Server:178.128.248.2
NS records: ns4.firstfind.nl, ns3.firstfind.nl, ns5.firstfind.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for istructor.com (unsigned zone)
⏱️ Timing
Total: 846ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 5.157.84.150 |
| NS | 3 | ns3.firstfind.nl, ns5.firstfind.net... |
| MX | 1 | server40.firstfind.nl (pri: 10) |
| SOA | 1 | ns3.firstfind.nl hostmaster.firstfind.nl |
Analysis
IP Addresses
istructor.com maps to IP address 5.157.84.150.
Other host names, for instance orcs.nl, mimax.eu, soefi.be, dolfijn.nu and kloeg.eu share IP numbers with istructor.com.
Name Servers
istructor.com is delegated to name servers ns5.firstfind.net, ns3.firstfind.nl and ns4.firstfind.nl.
istructor.com at least partially shares name servers with other domains such as gifthouse.nl, transus.nl, netframe.nl, 10xsprint.com and termoparels.com.
Host names with two IP numbers:
ns5.firstfind.net points to 2a03:b0c0:2:d0::1183:f001 and 178.128.248.2.
ns3.firstfind.nl points to 2a01:b940:1057::53 and 5.157.86.222.
ns4.firstfind.nl points to 2a01:b940:1057::54 and 5.157.87.222.
Mail Servers
istructor.com is handled by a single mail server, server40.firstfind.nl.
istructor.com shares the same mail server setup as other domains, including dancesing.com, ikkoopmijnhuiszelf.com, w3designer.eu, aitelberd.com and rodef.nl.
server40.firstfind.nl points to one IP number: 5.157.84.149.