Domain report: irif.fr

Registration

info

.fr country-code · GANDI · expires 2027-02-23

TLD: .fr (country-code)
ICANN policies apply: no
Registrar: GANDI
Registered: 13 May 2015
Last changed: 15 January 2026
Expires: 23 February 2027
Status: client transfer prohibited
Registry nameservers: korolev.univ-paris7.fr, ns4.cnrs.fr, potemkin.univ-paris7.fr
RDAP server: https://rdap.nic.fr/

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.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 2027-02-23 #3

The registration is valid until 2027-02-23 (124 days).
✓ Transfer locked #4

Registry status: client transfer prohibited.
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

info

korolev.univ-paris7.fr, ns4.cnrs.fr, potemkin.univ-paris7.fr

Parent zone: fr
Delegation from: d.nic.fr (194.0.9.1)
NS at the parent: korolev.univ-paris7.fr, ns4.cnrs.fr, potemkin.univ-paris7.fr
NS in the zone: korolev.univ-paris7.fr, ns4.cnrs.fr, potemkin.univ-paris7.fr

Nameserver	Addresses	Network (AS)	Glue
korolev.univ-paris7.fr	194.254.61.138 2001:660:3301:8000::1:2	AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR	194.254.61.138 2001:660:3301:8000::1:2
ns4.cnrs.fr	195.220.197.11 2001:660:500a:2210::11	AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR	-
potemkin.univ-paris7.fr	194.254.61.141 2001:660:3301:8000::1:1	AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR	194.254.61.141 2001:660:3301:8000::1:1

✓ 3 nameservers #6

Delegated to korolev.univ-paris7.fr, ns4.cnrs.fr, potemkin.univ-paris7.fr.
✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
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All nameservers in one AS

All nameserver addresses are announced by one network operator (AS2200 (FR-RENATER - Renater, FR): 6 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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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
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

warn

6 of 6 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
korolev.univ-paris7.fr 194.254.61.138	NOERROR, 14 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8
korolev.univ-paris7.fr 2001:660:3301:8000::1:2	NOERROR, 14 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8
ns4.cnrs.fr 195.220.197.11	NOERROR, 17 ms, authoritative	no	yes / yes	refused	SECRET
ns4.cnrs.fr 2001:660:500a:2210::11	NOERROR, 19 ms, authoritative	no	yes / yes	refused	SECRET
potemkin.univ-paris7.fr 194.254.61.141	NOERROR, 14 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8
potemkin.univ-paris7.fr 2001:660:3301:8000::1:1	NOERROR, 14 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8

✓ All respond #14

All 6 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.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: korolev.univ-paris7.fr: "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8"; potemkin.univ-paris7.fr: "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8". Hide or replace the version string.

#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.

info

serial 2026101600 · primary ns.irif.fr

✓ Serial 2026101600 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 6h, retry 1h, expire 30d, negative TTL 1d.
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Hidden master

The primary nameserver ns.irif.fr is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

#24
✓ Contact admin@math.univ-paris-diderot.fr #25

The SOA RNAME admin.math.univ-paris-diderot.fr means admin@math.univ-paris-diderot.fr.
✓ Date-based serial #26

The serial 2026101600 follows the YYYYMMDDnn convention (2026-10-16).

warn

Not signed

info

7 records at the apex

Type	Value	TTL
SOA	ns.irif.fr. admin.math.univ-paris-diderot.fr. 2026101600 21600 3600 2592000 86400	28800
NS	ns4.cnrs.fr.	28800
NS	korolev.univ-paris7.fr.	28800
NS	potemkin.univ-paris7.fr.	28800
MX	10 korolev.univ-paris7.fr.	28800
MX	10 potemkin.univ-paris7.fr.	28800
TXT	"v=spf1 mx ?all"	28800

✓ TTLs within range #32

TTLs: MX 8h, NS 8h. The NS TTL at the parent is 1h and in the zone 8h; 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.
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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