cyu.fr

Checked 22 October 2026, 02:30 UTC · via 8.8.8.8
!Passed with warnings
26 passed 1 warning 0 failed 4 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-01-24

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
4 July 2007
Last changed
28 February 2026
Expires
24 January 2027
Status
active
Registry nameservers
dns1.u-cergy.fr, dns2.u-cergy.fr, nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com
RDAP server
https://rdap.nic.fr/

Checks

  • i
    .fr is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .fr is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2027-01-24 #3
    The registration is valid until 2027-01-24 (94 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

dns1.u-cergy.fr, dns2.u-cergy.fr, nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
dns1.u-cergy.fr, dns2.u-cergy.fr, nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com
NS in the zone
dns1.u-cergy.fr, dns2.u-cergy.fr, nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com
NameserverAddressesNetwork (AS)Glue
dns1.u-cergy.fr193.54.113.3AS2200 FR-RENATER - Renater, FR193.54.113.3
dns2.u-cergy.fr193.54.113.5AS2200 FR-RENATER - Renater, FR193.54.113.5
nsa.perf1.fr81.92.94.100 2a01:c8:100::100AS20756 NAMESHIELD - NAMESHIELD SAS, FR AS20756 NAMESHIELD - NAMESHIELD SAS, FR81.92.94.100 2a01:c8:100::100
nsb.perf1.com81.92.95.100 2a01:c8:101::100AS20756 NAMESHIELD - NAMESHIELD SAS, FR AS20756 NAMESHIELD - NAMESHIELD SAS, FR-
nsc.perf1.com152.89.172.100 2a09:35c0:102::100AS209510 NAMESHIELDGRP - NAMESHIELD SAS, FR AS209510 NAMESHIELDGRP - NAMESHIELD SAS, FR-

Checks

  • ✓ 5 nameservers #6
    Delegated to dns1.u-cergy.fr, dns2.u-cergy.fr, nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 4 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS20756 (NAMESHIELD - NAMESHIELD SAS, FR): 4 addresses; AS209510 (NAMESHIELDGRP - NAMESHIELD SAS, FR): 2 addresses; AS2200 (FR-RENATER - Renater, FR): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .fr.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns1.u-cergy.fr, dns2.u-cergy.fr.
    #13

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.u-cergy.fr 193.54.113.3NOERROR, 15 ms, authoritativenoyes / yesrefused-
dns2.u-cergy.fr 193.54.113.5NOERROR, 15 ms, authoritativenoyes / yesrefused-
nsa.perf1.fr 81.92.94.100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure
nsa.perf1.fr 2a01:c8:100::100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure
nsb.perf1.com 81.92.95.100NOERROR, 9 ms, authoritativenoyes / yesrefusedSecure
nsb.perf1.com 2a01:c8:101::100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure
nsc.perf1.com 152.89.172.100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure
nsc.perf1.com 2a09:35c0:102::100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure

Checks

  • ✓ All respond #14
    All 8 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: nsa.perf1.fr: "Secure"; nsb.perf1.com: "Secure"; nsc.perf1.com: "Secure".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2019123487 · primary dns1.u-cergy.fr

Found

Primary (MNAME)
dns1.u-cergy.fr
Contact (RNAME)
hostmaster.cyu.fr
Serial
2019123487
Refresh / retry
1200 s / 300 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.u-cergy.fr (193.54.113.3)2019123487
dns2.u-cergy.fr (193.54.113.5)2019123487
nsa.perf1.fr (81.92.94.100)2019123487
nsa.perf1.fr (2a01:c8:100::100)2019123487
nsb.perf1.com (81.92.95.100)2019123487
nsb.perf1.com (2a01:c8:101::100)2019123487
nsc.perf1.com (152.89.172.100)2019123487
nsc.perf1.com (2a09:35c0:102::100)2019123487

Checks

  • ✓ Serial 2019123487 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 20m, retry 5m, expire 14d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.u-cergy.fr is one of the listed nameservers.
  • ✓ Contact hostmaster@cyu.fr #25
    The SOA RNAME hostmaster.cyu.fr means hostmaster@cyu.fr.
  • ✓ Timestamp serial #26
    The serial 2019123487 is a Unix timestamp (2033-12-25 11:38 UTC).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

pass

26 records at the apex

Found

Read from
193.54.113.3:53
TypeValueTTL
SOAdns1.u-cergy.fr. hostmaster.cyu.fr. 2019123487 1200 300 1209600 36003600
NSnsb.perf1.com.3600
NSdns1.u-cergy.fr.3600
NSnsc.perf1.com.3600
NSnsa.perf1.fr.3600
NSdns2.u-cergy.fr.3600
A193.54.116.333600
A193.54.116.313600
A193.54.116.323600
MX10 mxb.relay.renater.fr.3600
MX10 mxd.relay.renater.fr.3600
MX10 mxa.relay.renater.fr.3600
MX10 mxc.relay.renater.fr.3600
TXT"google-site-verification=8WkFT3nxwMCqDWpHjYcEGK6GwufJ0hc_NMcERhMAnv8"3600
TXT"HARICA-gfGE4xVZuXKsCVrnb73"3600
TXT"apple-domain-verification=PjSigbCIze60otuJ"3600
TXT"brevo-code:26c5961c94a9b9b8e8e0b42e05935660"3600
TXT"3bv212r5gjyfjcztc1x0jqqstqql4r03"3600
TXT"brevo-code:f949279146a8a8c8896ad568a3fd783c"3600
TXT"brevo-code:a54e0c78ea8729eea1005a1769a8c10e"3600
TXT"MS=ms61201078"3600
TXT"v=spf1 ip4:62.4.26.75 ip4:193.48.70.12 ip4:193.54.113.15 ip4:193.54.113.16 ip4:193.54.115.72 ip4:193.54.115.73 ip4:194.254.240.0/23 ip4:194.254.242.0/24 ip4:194.254.243.0/28 a:partage.renater.fr mx:partage.renater.fr include:_spf.google.com include:server" "s.etarget-emailing.com include:spf.mailjet.com include:spf.tipimail.com include:eu.zcsend.net include:sendgrid.net include:spf.ymag.cloud include:spf.brevo.com ~all"3600
TXT"tmes=bdd2b4ff447fb74e57fb57ea7847da56"3600
TXT"zoho-verification=zb16429823.zmverify.zoho.eu"3600
CAA0 issuewild "harica.gr"3600
CAA0 issue "harica.gr"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: harica.gr.