cers05.fr - robtex.com
cers05.fr
| DNSSEC | ⚠️ Not signed | ||||||
| A | 109.234.164.187🇫🇷 O2SWITCH109.234.164.0/22 | ||||||
| PTR | juan.o2switch.net | ||||||
| NS | ns1.o2switch.net ⭐ | ||||||
| A | 109.234.160.5🇫🇷 O2SWITCH109.234.160.0/24 o2switch Internet Routing | ||||||
| PTR | ns1.o2switch.net | ||||||
| NS | ns2.o2switch.net | ||||||
| A | 109.234.161.5🇫🇷 O2SWITCH109.234.161.0/24 o2switch Internet Routing | ||||||
| PTR | ns2.o2switch.net | ||||||
| MX | mail.cers05.fr ⭐ | ||||||
| A | 109.234.164.153🇫🇷 O2SWITCH109.234.164.0/22 | ||||||
| PTR | 109-234-164-153.reverse.odns.fr | ||||||
| TXT | v=spf1 +mx +a +ip4:109.234.164.153 +include:spf.jabatus.fr -all | ||||||
| TXT | Sendinblue-code:3a3fe58a66380df654f92f0f17bab86fv=spf1 include:spf.sendinblue... | ||||||
| SOA | ns1.o2switch.netsystemshl@o2switch.fr 2025-04-09 #1 | ||||||
fr
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.fr ⭐ 🔒 | ||||||
| NS | d.nic.fr 🔒 | ||||||
| NS | f.ext.nic.fr 🔒 | ||||||
| NS | g.ext.nic.fr 🔒 | ||||||
| TXT | 34 RRs processed [03/03/2026 03H50:47] | ||||||
| SOA | a.nic.frdnsmaster@afnic.fr serial=2244430463 | ||||||
Subdomains
mail.cers05.fr |
Same first word
cers05.fr |
DNS History
4 records (4 active, 0 former)
●NSns1.o2switch.net2026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 15:44:24
●NSns2.o2switch.net2026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 15:44:24
●MXmail.cers05.fr2026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 15:44:24
●A109.234.164.1872026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 15:44:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| fr | d.nic.fr, f.ext.nic.fr, g.ext.nic.fr | - |
| cers05.fr | ns2.o2switch.net, ns1.o2switch.net | - |
✅ Authoritative Response
Server: 109.234.161.5
NS records: ns2.o2switch.net, ns1.o2switch.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cers05.fr (unsigned zone)
⏱️ Timing
Total: 811ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 109.234.164.187 |
| NS | 2 | ns2.o2switch.net, ns1.o2switch.net |
| MX | 1 | mail.cers05.fr (pri: 0) |
| TXT | 2 | v=spf1 +mx +a +ip4:109.234.164.153 +incl, Sendinblue-code:3a3fe58a66380df654f92f0f |
| SOA | 1 | ns1.o2switch.net systemshl.o2switch.fr |
Analysis
Hierarchy
The parent of mail.cers05.fr is cers05.fr.
IP Addresses
cers05.fr points to a single IP number: 109.234.164.187.
Other host names, for instance desgains.fr, envoisms.net, green-loc.fr, viadecom.fr and bruemmer-hamburg.de share IP numbers with cers05.fr.
Name Servers
cers05.fr is delegated to two name servers: ns1.o2switch.net and ns2.o2switch.net.
cers05.fr uses the same name server setup as other domains, for instance secumax.fr, atelier-des-cadeaux.com, anne-ferrier.fr, capenr.com and intalti.com.
Host names with one IP number:
ns1.o2switch.net points to: 109.234.160.5.
ns2.o2switch.net points to: 109.234.161.5.
Mail Servers
The mail server for cers05.fr is mail.cers05.fr.
Host name mail.cers05.fr resolves to IP 109.234.164.153.