roberthalf.com

Checked 22 October 2026, 10:32 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2028-11-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
6 November 1995
Last changed
24 September 2026
Expires
5 November 2028
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns-1394.awsdns-46.org, ns-147.awsdns-18.com, ns-1976.awsdns-55.co.uk, ns-988.awsdns-59.net
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 2028-11-05 #3
    The registration is valid until 2028-11-05 (744 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1394.awsdns-46.org, ns-147.awsdns-18.com, ns-1976.awsdns-55.co.uk, ns-988.awsdns-59.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1394.awsdns-46.org, ns-147.awsdns-18.com, ns-1976.awsdns-55.co.uk, ns-988.awsdns-59.net
NS in the zone
ns-1394.awsdns-46.org, ns-147.awsdns-18.com, ns-1976.awsdns-55.co.uk, ns-988.awsdns-59.net
NameserverAddressesNetwork (AS)Glue
ns-1394.awsdns-46.org205.251.197.114 2600:9000:5305:7200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-147.awsdns-18.com205.251.192.147 2600:9000:5300:9300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.147 2600:9000:5300:9300::1
ns-1976.awsdns-55.co.uk205.251.199.184 2600:9000:5307:b800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-988.awsdns-59.net205.251.195.220 2600:9000:5303:dc00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1394.awsdns-46.org, ns-147.awsdns-18.com, ns-1976.awsdns-55.co.uk, ns-988.awsdns-59.net.
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1394.awsdns-46.org 205.251.197.114NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1394.awsdns-46.org 2600:9000:5305:7200::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-147.awsdns-18.com 205.251.192.147NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-147.awsdns-18.com 2600:9000:5300:9300::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1976.awsdns-55.co.uk 205.251.199.184NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1976.awsdns-55.co.uk 2600:9000:5307:b800::1NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns-988.awsdns-59.net 205.251.195.220NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-988.awsdns-59.net 2600:9000:5303:dc00::1NOERROR, 8 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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 1 · primary ns-988.awsdns-59.net

Found

Primary (MNAME)
ns-988.awsdns-59.net
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-1394.awsdns-46.org (205.251.197.114)1
ns-1394.awsdns-46.org (2600:9000:5305:7200::1)1
ns-147.awsdns-18.com (205.251.192.147)1
ns-147.awsdns-18.com (2600:9000:5300:9300::1)1
ns-1976.awsdns-55.co.uk (205.251.199.184)1
ns-1976.awsdns-55.co.uk (2600:9000:5307:b800::1)1
ns-988.awsdns-59.net (205.251.195.220)1
ns-988.awsdns-59.net (2600:9000:5303:dc00::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-988.awsdns-59.net is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

warn

43 records at the apex

Found

Read from
205.251.197.114:53
TypeValueTTL
SOAns-988.awsdns-59.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1394.awsdns-46.org.172800
NSns-147.awsdns-18.com.172800
NSns-1976.awsdns-55.co.uk.172800
NSns-988.awsdns-59.net.172800
A143.204.181.9060
A143.204.181.2460
A143.204.181.6060
A143.204.181.6160
MX10 rhii-com.mail.protection.outlook.com.300
TXT"00D3000000002D5=1TBUe00000001FY"3600
TXT"Dynatrace-site-verification=a16ab746-af0c-4bad-8017-caffc4a1c143__j2qs0ptnii3c7erdqopei87471"3600
TXT"MS=ms44996638"3600
TXT"ZOOM_verify_i9SsF3YpS4KNCmo2InRhNg"3600
TXT"_7z0rfvf46s3qsrqrp422h47eev7iynj"3600
TXT"_80ygsmwe2wbpq36c963w3gauo5xpivs"3600
TXT"_8hzxns81xg205076enun2i4ye35chbo"3600
TXT"adobe-idp-site-verification=5e0e2bc42a7dd89eca9f5eef3496237f46d7f1894f461f626d49d3dcc76d2d3c"3600
TXT"amazonses:8mQrVhoD81LYxKVnDqvZ12vjaee2mSm78jMafoyGsxA="3600
TXT"amazonses:A3JOf9Ogs1iLAaEy4Zcwi/5gVx/2U4+tmPXaBerWd+0="3600
TXT"amazonses:Qgfs02iNP+u0WgmNSiKHdnOVuoVmmq6ea3uD0DkQd74="3600
TXT"amazonses:WKVwm5rUn5z9s5kZS00WupC1VKLAWbTdsT92ht93MgM="3600
TXT"amazonses:nbiAHKljzfRu9Bebbn2bKLuS/q5zyM2iKG+KcfAmjNQ="3600
TXT"anthropic-domain-verification-4r5qr1=Rh91gKJXaaYxrgfUVpuCdJ7gH"3600
TXT"apple-domain-verification=Gf0qeQ2ig5Hnutat"3600
TXT"apple-domain-verification=neAQL7lK739D0EbqDtpUpwfHaFbqcUbqlmbm0WFL4CM"3600
TXT"atlassian-domain-verification=NdGTpfSypjZOqoQKQzayHY3UBT6/sezgbBwP/YQRM6CZqJxcmAhFV37ZGxU7UNG5"3600
TXT"atlassian-domain-verification=bGhk8ezCx3uSn90uFFEaEk1PPN65gx+aAprEkJebMscEIBQJ+Rlo2L8LlYr9MaDO"3600
TXT"bird-domain-verification=1277cd3b-6437-4608-b058-ea451bbb78fb"3600
TXT"canva-site-verification=ZrMAwovVAc8Z_ErPVVy_mw"3600
TXT"cursor-domain-verification-0j8hf5=YQA5Pd0QCB3m6Yje9mJ2glTAS"3600
TXT"docusign=8abd8be8-5979-4d12-a9f7-9bf99aca1903"3600
TXT"docusign=8c119285-3141-4e45-ad3d-90ae7a454fdf"3600
TXT"google-site-verification=i30wOekQz7zYa1FQ_PIJPzJQ4xohSd0yn-Ur-Ivdc_8"3600
TXT"jamf-site-verification=_iK2LbZDEYAtfbLEitkd3w"3600
TXT"mongodb-site-verification=cjnirnEUem46EifaTWjzbtq5Po9ONlu5"3600
TXT"ms-domain-verification=ee93d8d9-fd63-446f-af11-fe4549604aaf"3600
TXT"openai-domain-verification=dv-rmTblZBhgSYZzsiPHm1efTc5"3600
TXT"pexip-ms-tenant-domain-verification=55bf53d5-ab41-48dc-9a32-01ce673526d7"3600
TXT"rt27m5jwwbv1y8m43ncfpdm10b63kfv1"3600
TXT"sM9bFSytNPcLqFtXHHEkz2+Lts05I+XNqgcM5ac/cs1Vu7u5xOvWaU40glajqoEo/nPl2fS/VT7s7PG5SRx7Fw=="3600
TXT"sprout-social-2d06ef29-8dcf-4668-9c32-c45c9eaa5c2e"3600
TXT"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ 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