nttdata.com

.com generic · PSI-Japan, Inc. · expires 2027-07-23

Found

TLD

.com (generic)

ICANN policies apply

yes

Registrar

PSI-Japan, Inc.

Registered

24 July 1995

Last changed

24 July 2026

Expires

23 July 2027

Status

client transfer prohibited

Registry nameservers

ns01.nttdata.co.jp, ns02.nttdata.co.jp, ns03.nttdata.co.jp, ns6.intervia.ad.jp, ns6.via.or.jp

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 2027-07-23 #3

  The registration is valid until 2027-07-23 (273 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.

ns01.nttdata.co.jp, ns02.nttdata.co.jp, ns03.nttdata.co.jp, ns6.intervia.ad.jp, ns6.via.or.jp

Found

Parent zone

com

Delegation from

a.gtld-servers.net (192.5.6.30)

NS at the parent

ns01.nttdata.co.jp, ns02.nttdata.co.jp, ns03.nttdata.co.jp, ns6.intervia.ad.jp, ns6.via.or.jp

NS in the zone

ns01.nttdata.co.jp, ns02.nttdata.co.jp, ns03.nttdata.co.jp, ns6.intervia.ad.jp, ns6.via.or.jp

Checks

• ✓ 5 nameservers #6

  Delegated to ns01.nttdata.co.jp, ns02.nttdata.co.jp, ns03.nttdata.co.jp, ns6.intervia.ad.jp, ns6.via.or.jp.
• ✓ 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.
• i

  One address family in one network

  all IPv6 addresses are in 2001:c80::/48, while the other address family is spread over several networks.

  #10
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS4673 (INTERVIA - NTT DATA CORPORATION, JP): 7 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 .jp

  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
• i

  Partly IPv6

  These nameservers have no IPv6 address: ns01.nttdata.co.jp, ns02.nttdata.co.jp, ns03.nttdata.co.jp.

  #13

7 of 7 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 7 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: ns6.intervia.ad.jp: "InterVia"; ns6.via.or.jp: "InterVia".

  #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.

56 records at the apex

Found

Read from

163.135.156.25:53

Checks

• ✓ TTLs within range #32

  TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; 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