nbcnews.com

Checked 22 October 2026, 10:01 UTC · via 8.8.8.8
!Passed with warnings
24 passed 4 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-06-25

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
26 June 1997
Last changed
24 May 2025
Expires
25 June 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
nsa1.nbcnews.com, nsa2.nbcnews.com, nsa3.nbcnews.com, nsa4.nbcnews.com, nsa5.nbcnews.com, nsa6.nbcnews.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 2027-06-25 #3
    The registration is valid until 2027-06-25 (245 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update 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

warn

nsa1.nbcnews.com, nsa2.nbcnews.com, nsa3.nbcnews.com, nsa4.nbcnews.com, nsa5.nbcnews.com, nsa6.nbcnews.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
nsa1.nbcnews.com, nsa2.nbcnews.com, nsa3.nbcnews.com, nsa4.nbcnews.com, nsa5.nbcnews.com, nsa6.nbcnews.com
NS in the zone
nsa1.nbcnews.com, nsa2.nbcnews.com, nsa3.nbcnews.com, nsa4.nbcnews.com, nsa5.nbcnews.com, nsa6.nbcnews.com
NameserverAddressesNetwork (AS)Glue
nsa1.nbcnews.com54.200.82.65AS16509 AMAZON-02 - Amazon.com, Inc., US54.200.82.65
nsa2.nbcnews.com54.208.199.200AS14618 AMAZON-AES - Amazon.com, Inc., US54.208.199.200
nsa3.nbcnews.com13.52.111.184AS16509 AMAZON-02 - Amazon.com, Inc., US13.52.111.184
nsa4.nbcnews.com18.191.2.199AS16509 AMAZON-02 - Amazon.com, Inc., US18.191.2.199
nsa5.nbcnews.com52.88.170.187AS16509 AMAZON-02 - Amazon.com, Inc., US52.88.170.187
nsa6.nbcnews.com34.228.98.149AS14618 AMAZON-AES - Amazon.com, Inc., US34.228.98.149

Checks

  • ✓ 6 nameservers #6
    Delegated to nsa1.nbcnews.com, nsa2.nbcnews.com, nsa3.nbcnews.com, nsa4.nbcnews.com, nsa5.nbcnews.com, nsa6.nbcnews.com.
  • ✓ 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: nsa1.nbcnews.com, nsa2.nbcnews.com, nsa3.nbcnews.com, nsa4.nbcnews.com, nsa5.nbcnews.com, nsa6.nbcnews.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 6 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS14618 (AMAZON-AES - Amazon.com, Inc., US): 2 addresses; AS16509 (AMAZON-02 - Amazon.com, Inc., US): 4 addresses.
  • 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

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsa1.nbcnews.com 54.200.82.65NOERROR, 175 ms, authoritativenoyes / yesrefused9.18.28
nsa2.nbcnews.com 54.208.199.200NOERROR, 98 ms, authoritativenoyes / yesrefused9.18.28
nsa3.nbcnews.com 13.52.111.184NOERROR, 166 ms, authoritativenoyes / yesrefused9.18.28
nsa4.nbcnews.com 18.191.2.199NOERROR, 108 ms, authoritativenoyes / yesrefused9.18.28
nsa5.nbcnews.com 52.88.170.187NOERROR, 175 ms, authoritativenoyes / yesrefused9.18.28
nsa6.nbcnews.com 34.228.98.149NOERROR, 111 ms, authoritativenoyes / yesrefused9.18.28

Checks

  • ✓ All respond #14
    All 6 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: nsa1.nbcnews.com: "9.18.28"; nsa2.nbcnews.com: "9.18.28"; nsa3.nbcnews.com: "9.18.28"; nsa4.nbcnews.com: "9.18.28"; nsa5.nbcnews.com: "9.18.28"; nsa6.nbcnews.com: "9.18.28". 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

pass

serial 2026102317 · primary nsa1.nbcnews.com

Found

Primary (MNAME)
nsa1.nbcnews.com
Contact (RNAME)
nd.webops.nbcuni.com
Serial
2026102317
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
nsa1.nbcnews.com (54.200.82.65)2026102317
nsa2.nbcnews.com (54.208.199.200)2026102317
nsa3.nbcnews.com (13.52.111.184)2026102317
nsa4.nbcnews.com (18.191.2.199)2026102317
nsa5.nbcnews.com (52.88.170.187)2026102317
nsa6.nbcnews.com (34.228.98.149)2026102317

Checks

  • ✓ Serial 2026102317 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver nsa1.nbcnews.com is one of the listed nameservers.
  • ✓ Contact nd@webops.nbcuni.com #25
    The SOA RNAME nd.webops.nbcuni.com means nd@webops.nbcuni.com.
  • ✓ Date-based serial #26
    The serial 2026102317 follows the YYYYMMDDnn convention (2026-10-23).

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

24 records at the apex

Found

Read from
54.200.82.65:53
TypeValueTTL
SOAnsa1.nbcnews.com. nd.webops.nbcuni.com. 2026102317 10800 3600 604800 30086400
NSnsa1.nbcnews.com.300
NSnsa2.nbcnews.com.300
NSnsa3.nbcnews.com.300
NSnsa4.nbcnews.com.300
NSnsa5.nbcnews.com.300
NSnsa6.nbcnews.com.300
A54.69.127.167180
A44.219.25.60180
A34.206.62.195180
A52.37.236.218180
MX10 mxb-00176a04.gslb.pphosted.com.99
MX20 mx0a-00176a04.pphosted.com.99
MX20 mx0b-00176a04.pphosted.com.99
MX10 mxa-00176a04.gslb.pphosted.com.99
TXT"status-page-domain-verification=g1mtf45mvmsg"3600
TXT"v=msv1 t=845BDA23-4A70-4CCA-BF0C-3BECFC22A772"3600
TXT"facebook-domain-verification=kqjnlmeuf3c99pest8ha03obc0rzo9"3600
TXT"google-site-verification=MZHucJEiy3hHkD_EyCfnCM52zwIUSoz6wVPXyIc1Fe8"3600
TXT"google-site-verification=dMf4cxtcxKlWchKvPlULwDZi8XpI9-ARqe8j2mGmi4Y"3600
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com include:amazonses.com ~all"3600
TXT"_zb9s3eonpsdkdp8ekfmrm2zcedhbawn"3600
TXT"MS=ms47743650"3600
TXT"_73rsdvo67y994bm3vesxc772tqnxjsp"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (3m), MX (1m39s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 5m; 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