ricoh.com

Checked 22 October 2026, 10:31 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · GMO Internet Group, Inc. d/b/a Onamae.com · expires 2027-09-22

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GMO Internet Group, Inc. d/b/a Onamae.com
Registered
23 September 1997
Last changed
29 July 2026
Expires
22 September 2027
Status
client transfer prohibited
Registry nameservers
ns1.jp.ricoh.com, ns2.jp.ricoh.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 2027-09-22 #3
    The registration is valid until 2027-09-22 (334 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

warn

ns1.jp.ricoh.com, ns2.jp.ricoh.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.jp.ricoh.com, ns2.jp.ricoh.com
NS in the zone
ns1.jp.ricoh.com, ns2.jp.ricoh.com
NameserverAddressesNetwork (AS)Glue
ns1.jp.ricoh.com133.139.20.51AS131893 RICOH-NET - RICOH Company, Ltd., JP133.139.20.51
ns2.jp.ricoh.com133.139.88.51AS131893 RICOH-NET - RICOH Company, Ltd., JP133.139.88.51

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.jp.ricoh.com, ns2.jp.ricoh.com.
    #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: ns1.jp.ricoh.com, ns2.jp.ricoh.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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS131893 (RICOH-NET - RICOH Company, Ltd., JP): 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 .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
  • !
    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
ns1.jp.ricoh.com 133.139.20.51NOERROR, 246 ms, authoritativenoyes / yesrefused-
ns2.jp.ricoh.com 133.139.88.51NOERROR, 250 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

pass

serial 2026102202 · primary ns1.jp.ricoh.com

Found

Primary (MNAME)
ns1.jp.ricoh.com
Contact (RNAME)
postmaster.ns1.jp.ricoh.com
Serial
2026102202
Refresh / retry
3600 s / 1800 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.jp.ricoh.com (133.139.20.51)2026102202
ns2.jp.ricoh.com (133.139.88.51)2026102202

Checks

  • ✓ Serial 2026102202 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.jp.ricoh.com is one of the listed nameservers.
  • ✓ Contact postmaster@ns1.jp.ricoh.com #25
    The SOA RNAME postmaster.ns1.jp.ricoh.com means postmaster@ns1.jp.ricoh.com.
  • ✓ Date-based serial #26
    The serial 2026102202 follows the YYYYMMDDnn convention (2026-10-22).

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

14 records at the apex

Found

Read from
133.139.20.51:53
TypeValueTTL
SOAns1.jp.ricoh.com. postmaster.ns1.jp.ricoh.com. 2026102202 3600 1800 604800 3003600
NSns2.jp.ricoh.com.3600
NSns1.jp.ricoh.com.3600
A3.33.170.2053600
A15.197.131.2363600
MX10 mxb-00245801.gslb.pphosted.com.3600
MX10 mxa-00245801.gslb.pphosted.com.3600
TXT"google-site-verification=3ZYmxCyQ1y3VbN8fLZ8UBLRgi9M5X_VQ2mG04_2VU-k"3600
TXT"google-site-verification=65q51TtJPGDik2TnlO_V1oe0LPdPQ-jUtGUJod0GEvY"3600
TXT"google-site-verification=GltIHULzqRsxsC_8LZUsTGnvi6vaClEL6_t-MneqRY8"3600
TXT"google-site-verification=Yp9kHefnMGJwmO9cr_Vd6ri4E9EddA-nLMsnsU3KAIU"3600
TXT"google-site-verification=eI4W4JhrrX4vQO5IiFbD4RtnM71_E-WGZEPkkmQab0Y"3600
TXT"google-site-verification=m8J74gqln5Bp9nZdfS_SclPWRm110HOv73QltmTTRuQ"3600
TXT"v=spf1 ip4:202.248.73.0/24 include:spf-01.ricoh.co.jp ~all"3600

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