rarlab.com

Checked 22 October 2026, 10:24 UTC · via 8.8.8.8
iAll checks passed
32 passed 0 warnings 0 failed 3 info

Registration

info

.com generic · Gandi SAS · expires 2031-04-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
1 April 2002
Last changed
17 February 2026
Expires
1 April 2031
Status
client transfer prohibited
Registry nameservers
ns1.rarlab.com, ns2.rarlab.com, ns3.rarlab.com
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2031-04-01 #3
    The registration is valid until 2031-04-01 (1621 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.

Delegation

info

ns1.rarlab.com, ns2.rarlab.com, ns3.rarlab.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.rarlab.com, ns2.rarlab.com, ns3.rarlab.com
NS in the zone
ns1.rarlab.com, ns2.rarlab.com, ns3.rarlab.com
NameserverAddressesNetwork (AS)Glue
ns1.rarlab.com195.201.22.99 2a01:4f8:1c0c:4e6d::1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE195.201.22.99 2a01:4f8:1c0c:4e6d::1
ns2.rarlab.com174.138.9.247 2a03:b0c0:2:d0::c1c:7001AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US174.138.9.247 2a03:b0c0:2:d0::c1c:7001
ns3.rarlab.com51.195.68.169 2001:41d0:f00:1e02::169AS16276 OVH - OVH SAS, FR AS16276 OVH - OVH SAS, FR2001:41d0:f00:1e02::169 51.195.68.169

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.rarlab.com, ns2.rarlab.com, ns3.rarlab.com.
  • ✓ 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: ns1.rarlab.com, ns2.rarlab.com, ns3.rarlab.com.
  • ✓ 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 3 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS14061 (DIGITALOCEAN-ASN - DigitalOcean, LLC, US): 2 addresses; AS16276 (OVH - OVH SAS, FR): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses.
  • i
    All nameserver names under .com
    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.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.rarlab.com 195.201.22.99NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1.rarlab.com 2a01:4f8:1c0c:4e6d::1NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.rarlab.com 174.138.9.247NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.rarlab.com 2a03:b0c0:2:d0::c1c:7001NOERROR, 11 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.rarlab.com 51.195.68.169NOERROR, 7 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.rarlab.com 2001:41d0:f00:1e02::169NOERROR, 7 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.rarlab.com: "Served by PowerDNS - https://www.powerdns.com/"; ns2.rarlab.com: "Served by PowerDNS - https://www.powerdns.com/"; ns3.rarlab.com: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2026091010 · primary ns3.rarlab.com

Found

Primary (MNAME)
ns3.rarlab.com
Contact (RNAME)
root.rarlab.com
Serial
2026091010
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.rarlab.com (195.201.22.99)2026091010
ns1.rarlab.com (2a01:4f8:1c0c:4e6d::1)2026091010
ns2.rarlab.com (174.138.9.247)2026091010
ns2.rarlab.com (2a03:b0c0:2:d0::c1c:7001)2026091010
ns3.rarlab.com (51.195.68.169)2026091010
ns3.rarlab.com (2001:41d0:f00:1e02::169)2026091010

Checks

  • ✓ Serial 2026091010 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.rarlab.com is one of the listed nameservers.
  • ✓ Contact root@rarlab.com #25
    The SOA RNAME root.rarlab.com means root@rarlab.com.
  • ✓ Date-based serial #26
    The serial 2026091010 follows the YYYYMMDDnn convention (2026-09-10).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
21246ECDSAP256SHA256 (13)SHA256 497A362C835085B7…yes

DNSKEY in the zone

Key tagRoleAlgorithm
21246KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 21246 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

pass

14 records at the apex

Found

Read from
195.201.22.99:53
TypeValueTTL
SOAns3.rarlab.com. root.rarlab.com. 2026091010 10800 3600 2419200 36003600
NSns2.rarlab.com.86400
NSns3.rarlab.com.86400
NSns1.rarlab.com.86400
A51.195.68.1623600
AAAA2001:41d0:f00:1e01::1623600
MX10 mailcow.rarlab.com.86400
TXT"v=spf1 mx -all"86400
CAA0 issue "digicert.com"3600
CAA0 issuewild "digicert.com"3600
CAA0 issue ";"3600
CAA0 iodef "mailto:postmaster@rarlab.com"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issuewild ";"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, MX 1d, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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, none (issuance forbidden), letsencrypt.org.