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 01:23:40
●NSns2.o2switch.net2026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 01:23:40
●MXmail.cers05.fr2026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 01:23:40
●A109.234.164.1872026-03-20 → 2026-03-22 · 2 obs
● 2026-03-22 01:23:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| fr | f.ext.nic.fr, d.nic.fr, g.ext.nic.fr | - |
| cers05.fr | ns1.o2switch.net, ns2.o2switch.net | - |
✅ Authoritative Response
Server: 109.234.161.5
NS records: ns1.o2switch.net, ns2.o2switch.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cers05.fr (unsigned zone)
⏱️ Timing
Total: 1327ms | 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 | Sendinblue-code:3a3fe58a66380df654f92f0f, v=spf1 +mx +a +ip4:109.234.164.153 +incl |
| SOA | 1 | ns1.o2switch.net systemshl.o2switch.fr |
Analysis
Hierarchy
cers05.fr is parent of mail.cers05.fr.
IP Addresses
cers05.fr points to a single IP: 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's delegation is to two name servers ns1.o2switch.net and ns2.o2switch.net.
cers05.fr shares the same name server configuration as other domains, such as secumax.fr, atelier-des-cadeaux.com, anne-ferrier.fr, capenr.com and intalti.com.
Host names with a single IP:
ns1.o2switch.net resolves to 109.234.160.5.
ns2.o2switch.net resolves to 109.234.161.5.
Mail Servers
cers05.fr is served by a single mail server, mail.cers05.fr.
mail.cers05.fr points to IP number 109.234.164.153.