open-school.nl - robtex.com
open-school.nl
| DNSSEC | ⚠️ Not signed | ||||||
| A | 185.87.187.132🇳🇱 CLDIN-NL185.87.184.0/22 | ||||||
| PTR | plsh01.pcx-ams03.provider.nl | ||||||
| NS | ns1.deziweb.com ⭐ | ||||||
| A | 91.198.106.76🇳🇱 CLDIN-NL91.198.106.0/24 | ||||||
| NS | ns2.deziweb.com | ||||||
| A | 185.103.241.19🇳🇱 CLDIN-NL185.103.240.0/22 | ||||||
| MX | mail.open-school.nl ⭐ | ||||||
| A | 185.87.187.132🇳🇱 CLDIN-NL185.87.184.0/22 | ||||||
| PTR | plsh01.pcx-ams03.provider.nl | ||||||
| MX | mx20.open-school.nl(20) | ||||||
| A | 185.94.228.170🇳🇱 CLDIN-NL185.94.228.0/24 CLDIN Antwerp | ||||||
| PTR | ns2.reviced.nl | ||||||
| SOA | ns1.deziweb.comsupport@deziweb.com 2019-11-15 #2 | ||||||
nl
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns1.dns.nl ⭐ | ||||||
| NS | ns3.dns.nl | ||||||
| NS | ns4.dns.nl | ||||||
| TXT | nl zone update: 2026-05-13 14:00:01 +0000 (EPOCH 1778680801) | ||||||
| SOA | ns1.dns.nldns@sidn.nl 2026-05-13 #28 | ||||||
Subdomains
Same first word
Similar names
DNS History
6 records (5 active, 1 former)
●NSns1.deziweb.com2015-08-01 → 2026-05-13 · 2 obs
● 2026-05-13 14:42:30
●NSns2.deziweb.com2015-08-01 → 2026-05-13 · 2 obs
● 2026-05-13 14:42:30
●MXmail.open-school.nl2015-08-01 → 2026-05-13 · 2 obs
● 2026-05-13 14:42:30
●MXmx20.open-school.nl2015-08-01 → 2026-05-13 · 2 obs
● 2026-05-13 14:42:30
●A185.87.187.1322026-04-15 → 2026-05-13 · 3 obs
● 2026-04-15 18:07:18
● 2026-05-13 14:42:30
○A193.23.143.2472015-08-01 → 2017-07-09 · 4 obs
● 2017-07-09 22:05:44
○ 2026-04-15 18:07:18
○ 2026-05-13 14:42:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| nl | ns3.dns.nl, ns1.dns.nl, ns4.dns.nl | - |
| open-school.nl | ns1.deziweb.com, ns2.deziweb.com | - |
✅ Authoritative Response
Server:185.103.241.19
NS records: ns1.deziweb.com, ns2.deziweb.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for open-school.nl (unsigned zone)
⏱️ Timing
Total: 768ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.87.187.132 |
| NS | 2 | ns2.deziweb.com, ns1.deziweb.com |
| MX | 2 | mail.open-school.nl (pri: 10), mx20.open-school.nl (pri: 20) |
| SOA | 1 | ns1.deziweb.com support.deziweb.com |
Analysis
Hierarchy
open-school.nl is a parent of mx20.open-school.nl and mail.open-school.nl.
IP Addresses
open-school.nl points to IP number: 185.87.187.132.
Other host names such as singel110.com, bearandbunny.com, optifysik.nl, allimax.nl and arcasa.nl share IPs with open-school.nl.
Name Servers
open-school.nl is delegated to two name servers: ns1.deziweb.com and ns2.deziweb.com.
open-school.nl shares the same name server setup as nog.deziweb.com, avance.nl, downloaddatabases.com, pizzarette.it and watosloepen.nl.
Host names with a single IP:
ns1.deziweb.com points to 91.198.106.76.
ns2.deziweb.com points to 185.103.241.19.
Mail Servers
open-school.nl is handled by two mail servers: mail.open-school.nl and mx20.open-school.nl.
Host names with a single IP:
mail.open-school.nl points to 185.87.187.132.
mx20.open-school.nl points to 185.94.228.170.