istructor.com - dns.ninja
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=1786072549 | ||||||
Same first word
istructor.com |
DNS History
8 records (5 active, 3 former)
●NSns3.firstfind.nl2016-09-24 → 2026-08-07 · 2 obs
● 2026-08-07 03:34:14
●NSns4.firstfind.nl2016-09-24 → 2026-08-07 · 2 obs
● 2026-08-07 03:34:14
●NSns5.firstfind.net2016-09-24 → 2026-08-07 · 2 obs
● 2026-08-07 03:34:14
○MXmx1.firstfind.nl2016-09-24 → 2017-11-26 · 4 obs
● 2017-11-26 12:14:42
○ 2026-02-27 09:40:16
○ 2026-08-07 03:34:14
○MXmx2.firstfind.nl2016-09-24 → 2017-11-26 · 4 obs
● 2017-11-26 12:14:42
○ 2026-02-27 09:40:16
○ 2026-08-07 03:34:14
●MXserver40.firstfind.nl2016-09-24 → 2026-08-07 · 2 obs
● 2026-08-07 03:34:14
○A109.235.74.1582016-09-24 → 2017-11-26 · 4 obs
● 2017-11-26 12:14:42
○ 2026-02-27 09:40:16
○ 2026-08-07 03:34:14
●A5.157.84.1502026-02-27 → 2026-08-07 · 3 obs
● 2026-02-27 09:40:16
● 2026-08-07 03:34:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | h.gtld-servers.net, j.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net... | - |
| istructor.com | ns4.firstfind.nl, ns3.firstfind.nl, ns5.firstfind.net | - |
✅ Authoritative Response
Server:5.157.86.222
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: 598ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 5.157.84.150 |
| NS | 3 | ns5.firstfind.net, ns4.firstfind.nl... |
| MX | 1 | server40.firstfind.nl (pri: 10) |
| SOA | 1 | ns3.firstfind.nl hostmaster.firstfind.nl |
Analysis
IP Addresses
istructor.com resolves to just one IP address, 5.157.84.150.
Two other host names, along with af1.nl, stadsbrouwerijdemaastrichtermaltezer.com and orcs.nl, also share IP numbers with istructor.com.
Name Servers
istructor.com is served by three name servers: ns5.firstfind.net, ns3.firstfind.nl and ns4.firstfind.nl.
istructor.com partially shares its NS delegation with several other domains, including gifthouse.nl, transus.nl, netframe.nl and two others.
The hostnames ns5.firstfind.net, ns3.firstfind.nl and ns4.firstfind.nl each direct to two IP addresses — ns5.firstfind.net to 178.128.248.2 and 2a03:b0c0:2:d0::1183:f001, ns3.firstfind.nl to 5.157.86.222 and 2a01:b940:1057::53, and ns4.firstfind.nl to 5.157.87.222 and 2a01:b940:1057::54.
Mail Servers
The sole mail server for istructor.com is server40.firstfind.nl.
Among the domains sharing a mail server setup with istructor.com are dancesing.com, aitelberd.com, rodef.nl and two others.
server40.firstfind.nl resolves to 5.157.84.149 and no other IP number.