mba.com

Checked 22 October 2026, 09:43 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.com generic · Network Solutions, LLC · expires 2031-04-17

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
16 April 1993
Last changed
16 February 2026
Expires
17 April 2031
Status
client transfer prohibited
Registry nameservers
dns1.gmac.com, dns2.gmac.com, dns3.gmac.com, dns4.gmac.com, dns5.gmac.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 2031-04-17 #3
    The registration is valid until 2031-04-17 (1637 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

dns1.gmac.com, dns2.gmac.com, dns3.gmac.com, dns4.gmac.com, dns5.gmac.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.gmac.com, dns2.gmac.com, dns3.gmac.com, dns4.gmac.com, dns5.gmac.com
NS in the zone
dns1.gmac.com, dns2.gmac.com, dns3.gmac.com, dns4.gmac.com, dns5.gmac.com
NameserverAddressesNetwork (AS)Glue
dns1.gmac.com208.94.148.2AS16552 DIGICERT - Tiggee LLC, US208.94.148.2
dns2.gmac.com208.80.124.2AS16552 DIGICERT - Tiggee LLC, US208.80.124.2
dns3.gmac.com208.80.126.2AS16552 DIGICERT - Tiggee LLC, US208.80.126.2
dns4.gmac.com208.80.125.2AS16552 DIGICERT - Tiggee LLC, US208.80.125.2
dns5.gmac.com208.80.127.2AS16552 DIGICERT - Tiggee LLC, US208.80.127.2

Checks

  • ✓ 5 nameservers #6
    Delegated to dns1.gmac.com, dns2.gmac.com, dns3.gmac.com, dns4.gmac.com, dns5.gmac.com.
  • ✓ 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 5 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16552 (DIGICERT - Tiggee LLC, US): 5 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

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.gmac.com 208.94.148.2NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
dns2.gmac.com 208.80.124.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
dns3.gmac.com 208.80.126.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
dns4.gmac.com 208.80.125.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
dns5.gmac.com 208.80.127.2NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast

Checks

  • ✓ All respond #14
    All 5 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: dns1.gmac.com: "DNS Made Easy Anycast"; dns2.gmac.com: "DNS Made Easy Anycast"; dns3.gmac.com: "DNS Made Easy Anycast"; dns4.gmac.com: "DNS Made Easy Anycast"; dns5.gmac.com: "DNS Made Easy Anycast".
    #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 2008010475 · primary dns1.gmac.com

Found

Primary (MNAME)
dns1.gmac.com
Contact (RNAME)
noc.gmac.com
Serial
2008010475
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
dns1.gmac.com (208.94.148.2)2008010475
dns2.gmac.com (208.80.124.2)2008010475
dns3.gmac.com (208.80.126.2)2008010475
dns4.gmac.com (208.80.125.2)2008010475
dns5.gmac.com (208.80.127.2)2008010475

Checks

  • ✓ Serial 2008010475 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 1h, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.gmac.com is one of the listed nameservers.
  • ✓ Contact noc@gmac.com #25
    The SOA RNAME noc.gmac.com means noc@gmac.com.
  • ✓ Date-based serial #26
    The serial 2008010475 follows the YYYYMMDDnn convention (2008-01-04).

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

20 records at the apex

Found

Read from
208.94.148.2:53
TypeValueTTL
SOAdns1.gmac.com. noc.gmac.com. 2008010475 43200 3600 1209600 18086400
NSdns2.gmac.com.86400
NSdns3.gmac.com.86400
NSdns4.gmac.com.86400
NSdns5.gmac.com.86400
NSdns1.gmac.com.86400
A107.154.102.703600
A107.154.111.703600
MX10 mx2.gmac.iphmx.com.3600
MX10 mx1.gmac.iphmx.com.3600
TXT"srfn6uipeulfuclhd4aes6t7pp"3600
TXT"Afvu9bHLb3kJqeU1rHkYi5TINI5AAPnTN0Z+oj+GMdFoJGYJNDR2VjEhG8t7ImfqX48/egUq67QaGV5CGT0Ygg=="3600
TXT"_qnh3aj07mmqf242d2oopdetr6eyrjje"3600
TXT"MS=ms28952655"3600
TXT"h9cljrbs03m5ncv6mul7k74k60"3600
TXT"google-site-verification=XJyB5OfVypAzGw01QWD6IZpph23TVoBwha6pKDcQhu8"3600
TXT"_g8ytdjibxcgp81tk3q3506wqsfkh27d"3600
TXT"globalsign-domain-verification=15807029E1715DF58D511B3AE18A992F"3600
TXT"cj3sxvkrm44l6vrhjbyws3tmhrxxcdkl"3600
TXT"v=spf1 ip4:192.197.156.0/24 ip4:198.37.148.119 include:spf.protection.outlook.com include:esa1.gmac.iphmx.com include:esa2.gmac.iphmx.com include:504970.spf08.hubspotemail.net include:sendgrid.net include:_spf.qualtrics.com include:mail.zendesk.com ?all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, 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.
  • 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