cerfacs.fr

Checked 22 October 2026, 02:10 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-06-09

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
9 June 1996
Last changed
31 July 2026
Expires
9 June 2027
Status
active
Registry nameservers
dns.inria.fr, hal.cerfacs.fr, talisker.cerfacs.fr, zephyr.cerfacs.fr
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 2027-06-09 #3
    The registration is valid until 2027-06-09 (230 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

warn

dns.inria.fr, hal.cerfacs.fr, talisker.cerfacs.fr, zephyr.cerfacs.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
dns.inria.fr, hal.cerfacs.fr, talisker.cerfacs.fr, zephyr.cerfacs.fr
NS in the zone
dns.inria.fr, hal.cerfacs.fr, talisker.cerfacs.fr, zephyr.cerfacs.fr
NameserverAddressesNetwork (AS)Glue
dns.inria.fr193.51.208.13AS2200 FR-RENATER - Renater, FR193.51.208.13
hal.cerfacs.fr138.63.200.15AS1715 FR-REMIP2000 - Renater, FR138.63.200.15
talisker.cerfacs.fr138.63.200.55AS1715 FR-REMIP2000 - Renater, FR138.63.200.55
zephyr.cerfacs.fr138.63.200.29AS1715 FR-REMIP2000 - Renater, FR138.63.200.29

Checks

  • ✓ 4 nameservers #6
    Delegated to dns.inria.fr, hal.cerfacs.fr, talisker.cerfacs.fr, zephyr.cerfacs.fr.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: hal.cerfacs.fr, talisker.cerfacs.fr, zephyr.cerfacs.fr.
  • ✓ 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 2 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS1715 (FR-REMIP2000 - Renater, FR): 3 addresses; AS2200 (FR-RENATER - Renater, FR): 1 address.
  • i
    All nameserver names under .fr
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.inria.fr 193.51.208.13NOERROR, 30 ms, authoritativenoyes / yesrefused-
hal.cerfacs.fr 138.63.200.15NOERROR, 28 ms, authoritativenoyes / yesrefusedKSR X
talisker.cerfacs.fr 138.63.200.55NOERROR, 27 ms, authoritativenoyes / yesrefusedKSR X
zephyr.cerfacs.fr 138.63.200.29NOERROR, 28 ms, authoritativenoyes / yesrefusedKSR X

Checks

  • ✓ All respond #14
    All 4 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: hal.cerfacs.fr: "KSR X"; talisker.cerfacs.fr: "KSR X"; zephyr.cerfacs.fr: "KSR X".
    #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 2023072423 · primary hal.cerfacs.fr

Found

Primary (MNAME)
hal.cerfacs.fr
Contact (RNAME)
dnsmaster.cerfacs.fr
Serial
2023072423
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns.inria.fr (193.51.208.13)2023072423
hal.cerfacs.fr (138.63.200.15)2023072423
talisker.cerfacs.fr (138.63.200.55)2023072423
zephyr.cerfacs.fr (138.63.200.29)2023072423

Checks

  • ✓ Serial 2023072423 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver hal.cerfacs.fr is one of the listed nameservers.
  • ✓ Contact dnsmaster@cerfacs.fr #25
    The SOA RNAME dnsmaster.cerfacs.fr means dnsmaster@cerfacs.fr.
  • ✓ Date-based serial #26
    The serial 2023072423 follows the YYYYMMDDnn convention (2023-07-24).

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

21 records at the apex

Found

Read from
193.51.208.13:53
TypeValueTTL
SOAhal.cerfacs.fr. dnsmaster.cerfacs.fr. 2023072423 14400 3600 604800 8640086500
NSzephyr.cerfacs.fr.86500
NSdns.inria.fr.86500
NShal.cerfacs.fr.86500
NStalisker.cerfacs.fr.86500
A138.63.8.1186500
MX20 mx2.cerfacs.fr.86500
MX10 mx1.cerfacs.fr.86500
TXT"HARICA-XCBd7G9nrfUgwf53O9N"86500
TXT"v=spf1 ip4:138.63.2.56 ip4:138.63.2.84 ip4:138.63.2.86 a mx ~all"86500
TXT"HARICA-78fb0HAa4j4Lbn2YHjn"86500
TXT"apple-domain-verification=tqE11WuqaK34II0z"86500
CAA0 issuewild "digicert.com"86500
CAA0 issue "sectigo.com"86500
CAA0 issue "harica.gr"86500
CAA0 issuewild "sectigo.com"86500
CAA0 issue "digicert.com"86500
CAA0 issue "letsencrypt.org"86500
CAA0 iodef "mailto:dnsmaster@cerfacs.fr"86500
CAA0 issuewild "harica.gr"86500
CAA0 issuewild "letsencrypt.org"86500

Checks

  • ✓ TTLs within range #32
    TTLs: A 24h1m40s, MX 24h1m40s, NS 24h1m40s. The NS TTL at the parent is 1h and in the zone 24h1m40s; resolvers may use either.
  • ✓ 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: digicert.com, sectigo.com, harica.gr, letsencrypt.org.