centralesupelec.org - robtex.com
centralesupelec.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 51.75.23.42🇸🇦 OVH51.75.0.0/16 | ||||||
| PTR | 42.ip-51-75-23.eu | ||||||
| NS | ns1-metz.centralesupelec.fr ⭐ | ||||||
| A | 193.48.224.3🇫🇷 FR-RENATER193.48.0.0/14 RENATER | ||||||
| NS | ns.centralesupelec.fr | ||||||
| A | 138.195.193.12🇫🇷 FR-RENATER138.195.0.0/16 FR-ECP FRANCE | ||||||
| PTR | ns1-saclay.centralesupelec.fr | ||||||
| A | 193.48.224.3🇫🇷 FR-RENATER193.48.0.0/14 RENATER | ||||||
| A | 193.54.192.54🇫🇷 FR-RENATER193.54.0.0/15 RENATER FRANCE | ||||||
| PTR | ns1-rennes.centralesupelec.fr | ||||||
| NS | ns1-rennes.centralesupelec.fr | ||||||
| A | 193.54.192.54🇫🇷 FR-RENATER193.54.0.0/15 RENATER FRANCE | ||||||
| PTR | ns1-rennes.centralesupelec.fr | ||||||
| NS | ns1-saclay.centralesupelec.fr | ||||||
| A | 138.195.193.12🇫🇷 FR-RENATER138.195.0.0/16 FR-ECP FRANCE | ||||||
| PTR | ns1-saclay.centralesupelec.fr | ||||||
| MX | mail.supelec.fr ⭐ | ||||||
| A | 138.195.193.80🇫🇷 FR-RENATER138.195.0.0/16 FR-ECP FRANCE | ||||||
| PTR | mail.supelec.fr | ||||||
| TXT | HARICA-StHpUxbvcmWQ1IV1zQP | ||||||
| SOA | ns.centralesupelec.frhostmaster@centralesupelec.fr 2026-03-16 #1 | ||||||
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1777321349 | ||||||
Same first word
DNS History
12 records (6 active, 6 former)
○NSa.dns.gandi.net2015-05-31 → 2017-04-24 · 4 obs
● 2017-04-24 00:33:06
○ 2026-02-20 01:24:08
○ 2026-04-27 20:49:46
○NSb.dns.gandi.net2015-05-31 → 2017-04-24 · 4 obs
● 2017-04-24 00:33:06
○ 2026-02-20 01:24:08
○ 2026-04-27 20:49:46
○NSc.dns.gandi.net2015-05-31 → 2017-04-24 · 4 obs
● 2017-04-24 00:33:06
○ 2026-02-20 01:24:08
○ 2026-04-27 20:49:46
●NSns.centralesupelec.fr2026-02-20 → 2026-04-27 · 3 obs
● 2026-02-20 01:24:08
● 2026-04-27 20:49:46
●NSns1-metz.centralesupelec.fr2026-02-20 → 2026-04-27 · 3 obs
● 2026-02-20 01:24:08
● 2026-04-27 20:49:46
●NSns1-rennes.centralesupelec.fr2026-02-20 → 2026-04-27 · 3 obs
● 2026-02-20 01:24:08
● 2026-04-27 20:49:46
●NSns1-saclay.centralesupelec.fr2026-02-20 → 2026-04-27 · 3 obs
● 2026-02-20 01:24:08
● 2026-04-27 20:49:46
○MXfb.mail.gandi.net2015-05-31 → 2017-04-24 · 4 obs
● 2017-04-24 00:33:06
○ 2026-02-20 01:24:08
○ 2026-04-27 20:49:46
●MXmail.supelec.fr2026-02-20 → 2026-04-27 · 3 obs
● 2026-02-20 01:24:08
● 2026-04-27 20:49:46
○MXspool.mail.gandi.net2015-05-31 → 2017-04-24 · 4 obs
● 2017-04-24 00:33:06
○ 2026-02-20 01:24:08
○ 2026-04-27 20:49:46
○A217.70.184.382015-05-31 → 2017-04-24 · 4 obs
● 2017-04-24 00:33:06
○ 2026-02-20 01:24:08
○ 2026-04-27 20:49:46
●A51.75.23.422026-02-20 → 2026-04-27 · 3 obs
● 2026-02-20 01:24:08
● 2026-04-27 20:49:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| centralesupelec.org | ns1-rennes.centralesupelec.fr, ns1-saclay.centralesupelec.fr, ns1-metz.centralesupelec.fr | - |
✅ Authoritative Response
Server:193.48.224.3
NS records: ns1-rennes.centralesupelec.fr, ns1-saclay.centralesupelec.fr, ns1-metz.centralesupelec.fr
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for centralesupelec.org (unsigned zone)
⏱️ Timing
Total: 830ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 51.75.23.42 |
| NS | 3 | ns1-saclay.centralesupelec.fr, ns1-rennes.centralesupelec.fr... |
| MX | 1 | mail.supelec.fr (pri: 10) |
| TXT | 1 | HARICA-StHpUxbvcmWQ1IV1zQP |
| SOA | 1 | ns.centralesupelec.fr hostmaster.central |
Analysis
IP Addresses
centralesupelec.org points to IP number: 51.75.23.42.
Other host names such as www.centralesupelec.fr, research.centralesupelec.fr, 42.ip-51-75-23.eu, ikpo.asso.fr and ikpo.fr share IPs with centralesupelec.org.
Name Servers
centralesupelec.org is delegated to four name servers: ns1-metz.centralesupelec.fr, ns1-rennes.centralesupelec.fr, ns1-saclay.centralesupelec.fr and ns.centralesupelec.fr.
centralesupelec.org at least partially shares name servers with other domains, for instance supelec.fr, metz.centralesupelec.fr, 195.138.in-addr.arpa, l2s.supelec.fr and lss.supelec.fr.
These name servers are commonly used alongside ns-master.centralesupelec.fr, piston.ecp.fr, ns.laissus.fr, soleil.uvsq.fr, ns.sio.ecp.fr, ns.l2s.supelec.fr, ns.lss.supelec.fr, ns.lrmh.fr, ns.l2s.centralesupelec.fr and dns.rezo-rm.fr.
Host names with three IP numbers:
The host name ns.centralesupelec.fr points to: 138.195.193.12, 193.48.224.3 and 193.54.192.54.
Host names with one IP number:
The host name ns1-metz.centralesupelec.fr points to: 193.48.224.3.
The host name ns1-rennes.centralesupelec.fr points to: 193.54.192.54.
The host name ns1-saclay.centralesupelec.fr points to: 138.195.193.12.
Host names pointing to 138.195.193.12 are ns.centralesupelec.fr and ns1-saclay.centralesupelec.fr.
Host names pointing to 193.48.224.3 are ns.centralesupelec.fr and ns1-metz.centralesupelec.fr.
Host names pointing to 193.54.192.54 are ns.centralesupelec.fr and ns1-rennes.centralesupelec.fr.
Mail Servers
centralesupelec.org is handled by a single mail server, mail.supelec.fr.
centralesupelec.org shares the same mail server setup as other domains, for instance centralesupelec.com, centralesupelec.net and centralesupelec.eu.
mail.supelec.fr points to a single IP: 138.195.193.80.