cpu.fr

Checked 22 October 2026, 02:27 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 0 failed 6 info

Registration

info

.fr country-code · GIP RENATER · expires 2027-06-20

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
20 June 1996
Last changed
1 October 2026
Expires
20 June 2027
Status
active
Registry nameservers
ns.amue.fr, ns.cpu.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 2027-06-20 #3
    The registration is valid until 2027-06-20 (241 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

ns.amue.fr, ns.cpu.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
ns.amue.fr, ns.cpu.fr
NS in the zone
ns.amue.fr, ns.cpu.fr
NameserverAddressesNetwork (AS)Glue
ns.amue.fr195.83.191.21AS2200 FR-RENATER - Renater, FR195.83.191.21
ns.cpu.fr194.167.237.2AS2200 FR-RENATER - Renater, FR194.167.237.2

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.amue.fr, ns.cpu.fr.
    #6
  • ✓ 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: ns.cpu.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2200 (FR-RENATER - Renater, FR): 2 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.amue.fr 195.83.191.21NOERROR, 26 ms, authoritativenoyes / yesrefused-
ns.cpu.fr 194.167.237.2NOERROR, 17 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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

warn

serial 2022041234 · primary ns.cpu.fr

Found

Primary (MNAME)
ns.cpu.fr
Contact (RNAME)
hostmaster.cpu.fr
Serial
2022041234
Refresh / retry
3600 s / 3600 s
Expire
3600 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns.amue.fr (195.83.191.21)2022041234
ns.cpu.fr (194.167.237.2)2022041234

Checks

  • ✓ Serial 2022041234 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h; expire 1h is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 1h must be longer than refresh + retry. Current values: refresh 1h, retry 1h, expire 1h, negative TTL 10m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.cpu.fr is one of the listed nameservers.
  • ✓ Contact hostmaster@cpu.fr #25
    The SOA RNAME hostmaster.cpu.fr means hostmaster@cpu.fr.
  • ✓ Date-based serial #26
    The serial 2022041234 follows the YYYYMMDDnn convention (2022-04-12).

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

info

12 records at the apex

Found

Read from
195.83.191.21:53
TypeValueTTL
SOAns.cpu.fr. hostmaster.cpu.fr. 2022041234 3600 3600 3600 600600
NSns.cpu.fr.600
NSns.amue.fr.600
A62.210.42.54600
MX5 mx1.relay.renater.fr.600
MX5 mx2.relay.renater.fr.600
MX15 mxa.relay.renater.fr.600
MX15 mxc.relay.renater.fr.600
MX15 mxd.relay.renater.fr.600
MX15 mxb.relay.renater.fr.600
TXT"v=spf1 a:smtp.amue.fr a:reeves.paris.amue.fr a:margherita.amue.fr a:smtp.paris.amue.fr ~all"600
TXT"MS=ms29422170"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, NS 10m. The NS TTL at the parent is 1h and in the zone 10m; 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.
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35