united.com

Checked 22 October 2026, 11:15 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2026-12-16

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
17 December 1998
Last changed
12 December 2025
Expires
16 December 2026
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-66.akam.net, a10-65.akam.net, a11-66.akam.net, a18-67.akam.net, a26-64.akam.net, a5-65.akam.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 2026-12-16 #3
    The registration is valid until 2026-12-16 (54 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

a1-66.akam.net, a10-65.akam.net, a11-66.akam.net, a18-67.akam.net, a26-64.akam.net, a5-65.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-66.akam.net, a10-65.akam.net, a11-66.akam.net, a18-67.akam.net, a26-64.akam.net, a5-65.akam.net
NS in the zone
a1-66.akam.net, a10-65.akam.net, a11-66.akam.net, a18-67.akam.net, a26-64.akam.net, a5-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-66.akam.net193.108.91.66 2600:1401:2::42AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a10-65.akam.net96.7.50.65 2600:1480:d000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net84.53.139.66 2600:1480:1::42AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a18-67.akam.net95.101.36.67 2600:1480:4800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-64.akam.net23.74.25.64 2600:1480:b800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-65.akam.net95.100.168.65 2600:1480:b000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-66.akam.net, a10-65.akam.net, a11-66.akam.net, a18-67.akam.net, a26-64.akam.net, a5-65.akam.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 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 2 addresses; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 10 addresses.
  • i
    All nameserver names under .net
    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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-66.akam.net 193.108.91.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a1-66.akam.net 2600:1401:2::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10
a10-65.akam.net 96.7.50.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a10-65.akam.net 2600:1480:d000::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a11-66.akam.net 84.53.139.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10
a11-66.akam.net 2600:1480:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9
a18-67.akam.net 95.101.36.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a18-67.akam.net 2600:1480:4800::43NOERROR, 3 ms, authoritativenoyes / yesrefused48878.29
a26-64.akam.net 23.74.25.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a26-64.akam.net 2600:1480:b800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a5-65.akam.net 95.100.168.65NOERROR, 5 ms, authoritativenoyes / yesrefused41824.10
a5-65.akam.net 2600:1480:b000::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-66.akam.net: "41824.7"; a1-66.akam.net: "41824.10"; a10-65.akam.net: "48878.30"; a10-65.akam.net: "48878.29"; a11-66.akam.net: "41824.10"; a11-66.akam.net: "41824.9"; a18-67.akam.net: "48878.30"; a18-67.akam.net: "48878.29"; a26-64.akam.net: "48878.33"; a26-64.akam.net: "48878.27"; a5-65.akam.net: "41824.10"; a5-65.akam.net: "41824.8". Hide or replace the version string.
    #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

info

serial 2011114158 · primary vndcdf-fs0000-gma3-vip.ual.com

Found

Primary (MNAME)
vndcdf-fs0000-gma3-vip.ual.com
Contact (RNAME)
hostmaster.united.com
Serial
2011114158
Refresh / retry
10800 s / 3600 s
Expire
2592000 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
a1-66.akam.net (193.108.91.66)2011114158
a1-66.akam.net (2600:1401:2::42)2011114158
a10-65.akam.net (96.7.50.65)2011114158
a10-65.akam.net (2600:1480:d000::41)2011114158
a11-66.akam.net (84.53.139.66)2011114158
a11-66.akam.net (2600:1480:1::42)2011114158
a18-67.akam.net (95.101.36.67)2011114158
a18-67.akam.net (2600:1480:4800::43)2011114158
a26-64.akam.net (23.74.25.64)2011114158
a26-64.akam.net (2600:1480:b800::40)2011114158
a5-65.akam.net (95.100.168.65)2011114158
a5-65.akam.net (2600:1480:b000::41)2011114158

Checks

  • ✓ Serial 2011114158 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 30d, negative TTL 10m.
  • i
    Hidden master
    The primary nameserver vndcdf-fs0000-gma3-vip.ual.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@united.com #25
    The SOA RNAME hostmaster.united.com means hostmaster@united.com.
  • ✓ Timestamp serial #26
    The serial 2011114158 is a Unix timestamp (2033-09-23 18:49 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

64 records at the apex

Found

Read from
193.108.91.66:53
TypeValueTTL
SOAvndcdf-fs0000-gma3-vip.ual.com. hostmaster.united.com. 2011114158 10800 3600 2592000 60028800
NSa11-66.akam.net.28800
NSa1-66.akam.net.28800
NSa5-65.akam.net.28800
NSa26-64.akam.net.28800
NSa18-67.akam.net.28800
NSa10-65.akam.net.28800
A23.209.208.13020
MX20 mx0a-00212602.pphosted.com.300
MX10 mxb-00212602.gslb.pphosted.com.300
MX10 mxa-00212602.gslb.pphosted.com.300
MX20 mx0b-00212602.pphosted.com.300
TXT"cloudhealth=5dda028a-3bad-41ee-8197-a76d049e4648"60
TXT"google-gws-recovery-domain-verification=47260811"60
TXT"e2ma-verification=l59eb"60
TXT"anthropic-domain-verification-9jtz5g=oedRjF26denAvMXx0Ubb50D74"60
TXT"e2ma-verification=vozeb"60
TXT"_globalsign-domain-verification=2wRqY6IrIINLY7B8Qcp-qur9HsiRTO04g4gwsMmFy3"60
TXT"TSqI+8N8XlipHXL0ef29pOHU8OuiMLGRBHCe/Bj9pnVXi4+pFDDuyU7cAs0mRED85RC60Vk/RQk/UE+o+Qe3dw=="60
TXT"docusign=a852ec83-5d46-4c48-9ae4-35ac3ae4b32c"60
TXT"pardot895221=5106e47e334be87ed949b11dd8839ee745c0b5f2d9c49d4d7268519ee605ad84"60
TXT"_f4a7xelp84p4m660f9cr1t61ryb6n3f"60
TXT"_7d3owcum7npdansxr9rm5adumrqels5"60
TXT"cisco-ci-domain-verification=150e1a1fbae294ccdb82094631861d593dd76e186d81076c716c15de04b1b04e"60
TXT"miro-verification=c4f22d27f3df65dc4bcc76cdacabb97da8a5765e"60
TXT"docusign=83f7c0a0-80c9-41e2-9dbb-101c34f5fd08"60
TXT"pardot895221=fa7d573afba39e23c5d310777b3e4b8e3059fc036c5f8a141061e48acb644c2e"60
TXT"adobe-idp-site-verification=4b5fa402a6cdc780157d690e7860970f4447772807197ddf38cbc78d7b3666d6"60
TXT"pardot895221=0283c9002444941b4251d2fc11749bba12b56a77f8f1fcafcae8f8ea396db336"60
TXT"EjEnj26GQ6Rch4cK-0_3Bg"60
TXT"verification_token=89j2T8i6qC1Au6dING32qQtik"60
TXT"e2ma-verification=to1eb"60
TXT"smartsheet-site-validation=a-QJqDk8-xugCQsJJ59BloRXsQ78NHEu"60
TXT"twilio-domain-verification=422291df00dd2d1e86b024d9d140c96f"60
TXT"starlink-domain-verification=c05d3ac0-aef3-4c4a-a5a2-d2310fb2422b"60
TXT"cisco-ci-domain-verification=2348f9b423234f5b6cb296d8e0b21a433c9708dbd7885f35a347b7f361eef8e6"60
TXT"3hdk90qzhvh0l7yvw0wg014c6m2xxz9d"60
TXT"atlassian-domain-verification=LS4NFLIjbXxDhEDh1uRXHFIsGV0c7/eMwPLjJasBzHbldYDoiaVCRUUJ19njM5b/"60
TXT"_pu9ae99ovdbyxleilm1jlqdhzbmmcv5"60
TXT"Dynatrace-site-verification=5aa9bae5-aed4-4063-8545-7f63572d80ff__3j2g8rj4tmvasq9qhrv51ichkd"60
TXT"ciUNjcPdDUwJlNwxs7hQOL+JdXldzfLl1U0+1NLC4U/KcgyYha7rJDX0z8ECmAXiC7WfSIWGNLcakbS5aicncg=="60
TXT"MS=ms48035785"60
TXT"sending_domain473072=2536efd81f433897e4eade7bd5c07c9f572003ea06fcdee11f2872c01a4befbf"60
TXT"webexdomainverification.=c3b585c2-1a13-47c5-abc9-49cebb862ae3"60
TXT"vmware-cloud-verification-9cd123ef-b219-486d-a9a0-b315b5ba0da3"60
TXT"sitecore-domain-verification=544b04b1172546a8ad8a86742156828e"60
TXT"hpe-greenlake-domain-verification=4a774d567170674c43373938696b56704239656c347a533862435a66356b4455"60
TXT"e2ma-verification=wozeb"60
TXT"docker-verification=eac5f372-ff38-49a3-a449-013649023462"60
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"60
TXT"mandrill_verify.o-YnntrhVJmYGforpN1_eg"60
TXT"qFCoTGARAo0YzsD8J4JXGTPJnoGyXVcN1UUT76knKhsb0VWg5k8Ltz0EKn5Wht7bsSdnw7/DP8N0lC4BPHOutQ=="60
TXT"google-site-verification=o8Ds49E6OUh_KlAGHKP5Cp1n2VFnRCOn0Po9XIYNuVw"60
TXT"insomnia-validation=7975158d8fce4d6c9e6889f06d4894d5c0e9e9e6e7985e37865960ac45e99c60"60
TXT"ibmid=775b7bb2-5029-4241-8adb-c97959b13265"60
TXT"pardot895221=e613bb2bd7a53de50e4c0f525dca606bba246e4d5fc9514a220acf78f6b40cd2"60
TXT"zoho-verification=zb79381715.zmverify.zoho.in"60
TXT"apple-domain-verification=JX4d4nEINvrmcrFB"60
TXT"e2ma-verification=so1eb"60
TXT"cisco-ci-domain-verification=7b72a7a0f463b7ae34bd19b2b4e7c9e32a23184af97a606601ab4470cbb94b67"60
TXT"vmware-cloud-verification-21e81564-6cf2-4948-92cd-7d169a06dbfd"60
TXT"rebelmouse=0296577248d0df8680XXXXb4f5b2663e106f6c40"60
TXT"duo_sso_verification=DhdWOQSIwy1C7mfnQgxNMBEtJM5SbFCu5mbQ8jKQCh4LGxf6CmNJlx1NUMEFrro1"60
TXT"webexdomainverification.NMB6=5e3a4841-bed2-49e3-995e-7e6577637d4a"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 8h; 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