rbc.com

Checked 22 October 2026, 10:25 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 warnings 0 failed 3 info

Registration

info

.com generic · GoDaddy Corporate Domains, LLC · expires 2027-10-23

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy Corporate Domains, LLC
Registered
24 October 1994
Last changed
22 September 2026
Expires
23 October 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
edns3.ultradns.biz, edns3.ultradns.com, edns3.ultradns.net, edns3.ultradns.org, ns7.ultradns2.com, ns7.ultradns2.org
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 2027-10-23 #3
    The registration is valid until 2027-10-23 (365 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

pass

edns3.ultradns.biz, edns3.ultradns.com, edns3.ultradns.net, edns3.ultradns.org, ns7.ultradns2.com, ns7.ultradns2.org

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
edns3.ultradns.biz, edns3.ultradns.com, edns3.ultradns.net, edns3.ultradns.org, ns7.ultradns2.com, ns7.ultradns2.org
NS in the zone
edns3.ultradns.biz, edns3.ultradns.com, edns3.ultradns.net, edns3.ultradns.org, ns7.ultradns2.com, ns7.ultradns2.org
NameserverAddressesNetwork (AS)Glue
edns3.ultradns.biz204.74.67.3 2610:a1:1015::203AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
edns3.ultradns.com204.74.66.3 2001:502:f3ff::203AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US2001:502:f3ff::203 204.74.66.3
edns3.ultradns.net204.74.110.3 2610:a1:1014::203AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
edns3.ultradns.org204.74.111.3 2001:502:4612::203AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
ns7.ultradns2.com204.74.104.7 2610:a1:3107::53AS399153 SECURITYSERVICES - Vercara, LLC, US AS399155 SECURITYSERVICES - Vercara, LLC, US204.74.104.7 2610:a1:3107::53
ns7.ultradns2.org204.74.106.7 2610:a1:3207::53AS399154 SECURITYSERVICES - Vercara, LLC, US AS399154 SECURITYSERVICES - Vercara, LLC, US-

Checks

  • ✓ 6 nameservers #6
    Delegated to edns3.ultradns.biz, edns3.ultradns.com, edns3.ultradns.net, edns3.ultradns.org, ns7.ultradns2.com, ns7.ultradns2.org.
  • ✓ 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 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS12008 (VERCARA - Vercara, LLC, US): 8 addresses; AS399153 (SECURITYSERVICES - Vercara, LLC, US): 1 address; AS399154 (SECURITYSERVICES - Vercara, LLC, US): 2 addresses; AS399155 (SECURITYSERVICES - Vercara, LLC, US): 1 address.
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .biz, .com, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
edns3.ultradns.biz 204.74.67.3NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.biz 2610:a1:1015::203NOERROR, 7 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.com 204.74.66.3NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.com 2001:502:f3ff::203NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.net 204.74.110.3NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.net 2610:a1:1014::203NOERROR, 8 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.org 204.74.111.3NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
edns3.ultradns.org 2001:502:4612::203NOERROR, 34 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns7.ultradns2.com 204.74.104.7NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns7.ultradns2.com 2610:a1:3107::53NOERROR, 6 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns7.ultradns2.org 204.74.106.7NOERROR, 10 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
ns7.ultradns2.org 2610:a1:3207::53NOERROR, 10 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

Checks

  • ✓ All respond #14
    All 12 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: edns3.ultradns.biz: "UltraDNS Nameserver"; edns3.ultradns.com: "UltraDNS Nameserver"; edns3.ultradns.net: "UltraDNS Nameserver"; edns3.ultradns.org: "UltraDNS Nameserver"; ns7.ultradns2.com: "UltraDNS Nameserver"; ns7.ultradns2.org: "UltraDNS Nameserver".
    #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

warn

serial 2019247709 · primary edns3.ultradns.com

Found

Primary (MNAME)
edns3.ultradns.com
Contact (RNAME)
premiumdns.support.neustar
Serial
2019247709
Refresh / retry
600 s / 600 s
Expire
1209600 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
edns3.ultradns.biz (204.74.67.3)2019247709
edns3.ultradns.biz (2610:a1:1015::203)2019247709
edns3.ultradns.com (204.74.66.3)2019247709
edns3.ultradns.com (2001:502:f3ff::203)2019247709
edns3.ultradns.net (204.74.110.3)2019247709
edns3.ultradns.net (2610:a1:1014::203)2019247709
edns3.ultradns.org (204.74.111.3)2019247709
edns3.ultradns.org (2001:502:4612::203)2019247709
ns7.ultradns2.com (204.74.104.7)2019247709
ns7.ultradns2.com (2610:a1:3107::53)2019247709
ns7.ultradns2.org (204.74.106.7)2019247709
ns7.ultradns2.org (2610:a1:3207::53)2019247709

Checks

  • ✓ Serial 2019247709 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 10m is outside 20m–1d; retry 10m should be shorter than refresh 10m. Current values: refresh 10m, retry 10m, expire 14d, negative TTL 15m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver edns3.ultradns.com is one of the listed nameservers.
  • ✓ Contact premiumdns@support.neustar #25
    The SOA RNAME premiumdns.support.neustar means premiumdns@support.neustar.
  • ✓ Timestamp serial #26
    The serial 2019247709 is a Unix timestamp (2033-12-26 22:08 UTC).

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

46 records at the apex

Found

Read from
204.74.67.3:53
TypeValueTTL
SOAedns3.ultradns.com. premiumdns.support.neustar. 2019247709 600 600 1209600 900900
NSns7.ultradns2.com.900
NSns7.ultradns2.org.900
NSedns3.ultradns.biz.900
NSedns3.ultradns.com.900
NSedns3.ultradns.net.900
NSedns3.ultradns.org.900
A23.67.141.2111
MX5 mx1.hc391-17.ca.iphmx.com.300
MX5 mx2.hc391-17.ca.iphmx.com.300
TXT"0xnffqvbtk"600
TXT"4Tmrz-iPcFnEIgq49jYT"600
TXT"00DAq00000HiAf3=1TBAq000000Fzx"600
TXT"\"00D5f000006qGQp=1TBOM00000001If\""600
TXT"ZOOM_verify_Grwq3gsmS92P1vp_NSbovQ"600
TXT"apple-domain-verification=WrN62xt7q6hLcvBC"600
TXT"ibmid=16a6ff63-d66c-4ac7-999f-0455dc146339"600
TXT"flexera-domain-verification-jhvlociomomlvmmp"600
TXT"SFMC-gEp6A4ucUJ6_IwcAaFEO_m_eMLH6p_LCEWN-CRFv"600
TXT"canva-site-verification=7hxOuyweWXeVrqIsZwIEnw"600
TXT"cloudflare_dashboard_sso=356ae4f7e5fcb3f5a29d120ef6ae6e6f"600
TXT"mongodb-site-verification=Km2ua3DiXSTIdaW0XFesLUqJ586NeNaT"600
TXT"mongodb-site-verification=Oiv82QdQoL6T5Ru49sR5l71V1wzTbPFQ"600
TXT"factory-domain-verification-tgb5ge=PQsforvQ9Rh6aIUxOZcreAJGw"600
TXT"onetrust-domain-verification=1612cd1273c242f3ade45db8d8b3e95e"600
TXT"uber-domain-verification=ac383e73-3042-4989-b4d3-f586711db699"600
TXT"anthropic-domain-verification-cgqxq0=e5m3kc5yPsDKGhBRje1aHRDZV"600
TXT"sinch-domain-verification=c092870b-b8c7-4c62-973a-4eb190260ad8"600
TXT"ITm79/f0YxEzzCwLDWCN5a1t9vs9LygGFht9EvuAcKC34BCAtagLvwgijyePWnxQ"600
TXT"\"00DAs00000qOoDp=1TBAs00000004Oc; 00Dau000008TQFR=1TBJQ0000000KZp\""600
TXT"slack-domain-verification=mhBiPcrWVq4fpx33n1WhrLlbNdo6V7fBG6Ygxcil"600
TXT"google-site-verification=28o7jnj4zNw09HHe0CmoyLmUsvQKh2FGkb098tnqrNg"600
TXT"notion-domain-verification=fSGYXBXky8vXfLtl7WQjyeG0q1zCFmMPqWD67WJcTYe"600
TXT"mgverify=e7518abaa36457fe8d11eebe2481a7cff74974ee921ec89f7aea7d39de6c88fe"600
TXT"intersight=8d689dc6c046df4cc07fa473dc9deb7722ecd4c681b24db9a4f8cbe133035b14"600
TXT"intersight=de27862b5fcef6b49501b5d338123e7355904b9ef420330f497f5292264d68e0"600
TXT"9X0iVAneJlUPQ+Cy9BQmj2oN2aDA9yJFjEWpBLNrtFrOZtdXi+FlgZOPU7TsWnHODJkw5zOJePjuIlAIR85xIA=="600
TXT"wiz-domain-verification=9842b15a3028580108c29e440bf767ca870aef9bc65ca1bf10eb353a7295a6e8"600
TXT"wiz-domain-verification=b1088d6cfb8e90501e1b78d19f0ea251899eb5677738e39dc8012e4ea9f88598"600
TXT"xif9q62Bs+/GPn/BflTpQI/yzFDrPT7PdxyLmW1PlJ0KnPs2UqOmcduCcFaZe+e6jon/ADwV6uk8QmkO6TQGVA=="600
TXT"Dynatrace-site-verification=4ff95308-3528-403b-8f0c-977eed9b988f__e4o86nm49qjd3bal0a2qnso4vm"600
TXT"adobe-idp-site-verification=35f5ec26db46b47b2d687034824eaabf9359afe2266ab9b428506c7123e393b5"600
TXT"figma-domain-verification=9b7e21ee536f107734afb6741613b9cf7efd1e51d3668dec227ea3f1229c8609-1740587603"600
TXT"\"00DKj000002Yq6c=1TBMm00000009mT; 00D1I000000ldHL=1TBOI00000003qj; 00Df4000004Jha3=1TBOH000000043d; 00D37000000JqE8=1TBOG00000006tR\""600
TXT"00D8c000006dcNF=1TBOL0000000Bec;00DbZ000001liWT=1TBbZ00000001U2;00DDx0000002DRt=1TBbZ000000012Y;00DD30000001UtK=1TBbZ00000000pe;00DHo0000007UDN=1TBOF00000004hy"600
TXT"v=spf1 mx exists:%{i}.spf.hc391-17.ca.iphmx.com exists:%{i}.spf.hc490-56.ca.iphmx.com exists:%{i}.spf.hc859-0.ca.iphmx.com ip4:142.245.10.0/28 ip4:170.175.30.0/28 include:spf.protection.outlook.com -all"600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (11s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 15m; resolvers may use either.
    #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