nfl.com

Checked 22 October 2026, 10:03 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 warnings 0 failed 7 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-05-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
20 May 1996
Last changed
19 April 2025
Expires
21 May 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
udns1.ultradns.net, udns2.ultradns.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 2027-05-21 #3
    The registration is valid until 2027-05-21 (210 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

udns1.ultradns.net, udns2.ultradns.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
udns1.ultradns.net, udns2.ultradns.net
NS in the zone
udns1.ultradns.net, udns2.ultradns.net
NameserverAddressesNetwork (AS)Glue
udns1.ultradns.net204.69.234.1 2001:502:f3ff::dAS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
udns2.ultradns.net204.74.101.1 2610:a1:1014::dAS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: udns1.ultradns.net, udns2.ultradns.net.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12008 (VERCARA - Vercara, LLC, US): 4 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 .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

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
udns1.ultradns.net 204.69.234.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
udns1.ultradns.net 2001:502:f3ff::dNOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
udns2.ultradns.net 204.74.101.1NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
udns2.ultradns.net 2610:a1:1014::dNOERROR, 8 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

Checks

  • ✓ All respond #14
    All 4 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: udns1.ultradns.net: "UltraDNS Nameserver"; udns2.ultradns.net: "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 2018968771 · primary udns1.ultradns.net

Found

Primary (MNAME)
udns1.ultradns.net
Contact (RNAME)
dns_admin.nfl.com
Serial
2018968771
Refresh / retry
60 s / 60 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
udns1.ultradns.net (204.69.234.1)2018968771
udns1.ultradns.net (2001:502:f3ff::d)2018968771
udns2.ultradns.net (204.74.101.1)2018968771
udns2.ultradns.net (2610:a1:1014::d)2018968771

Checks

  • ✓ Serial 2018968771 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 1m is outside 20m–1d; retry 1m should be shorter than refresh 1m. Current values: refresh 1m, retry 1m, expire 1000h, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver udns1.ultradns.net is one of the listed nameservers.
  • ✓ Contact dns_admin@nfl.com #25
    The SOA RNAME dns_admin.nfl.com means dns_admin@nfl.com.
  • ✓ Timestamp serial #26
    The serial 2018968771 is a Unix timestamp (2033-12-23 16:39 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

55 records at the apex

Found

Read from
204.69.234.1:53
TypeValueTTL
SOAudns1.ultradns.net. dns_admin.nfl.com. 2018968771 60 60 3600000 36003600
NSudns1.ultradns.net.86400
NSudns2.ultradns.net.86400
A151.101.193.5560
A151.101.129.5560
A151.101.65.5560
A151.101.1.5560
MX10 us-smtp-inbound-1.mimecast.com.43200
MX10 us-smtp-inbound-2.mimecast.com.43200
TXT"00687441"3600
TXT"MS=ms18024666"3600
TXT"6iumb0glosel79bbik4pvm18gl"3600
TXT"7mv1lef4edcvi5fk2gf2chsrck"3600
TXT"a2l59ofpco8dh7u8dbpl2t1sq0"3600
TXT"bls7s16g2di2nq6c794da558go"3600
TXT"cf79hu847ge40kg05b6rmplphr"3600
TXT"ivvmb8q8dk9dpj7fi8r8dn67o7"3600
TXT"p4opbhfvmn4c260prr8q7g5g6h"3600
TXT"t6mgFIBQaMKZt67fok1QOzztoQ"3600
TXT"vh4svp7pn995qsudqi4eiegpeb"3600
TXT"3fff4087a65c421498e2a07af1dd34f8"3600
TXT"_pgz89pw3mkmy4kwb3ta5me98naehe20"3600
TXT"_udnhxs2cqlk1ad18zcb7n1mot06cedv"3600
TXT"_v60lj3jfdgpngk22vcwls37tspw6bha"3600
TXT"v58zwtwk6m91r346pc6251bv4m5nlnnt"3600
TXT"3269f641-af27-48ce-bb26-7a108384d008"3600
TXT"9a0eaaca-9a65-4bae-b163-fd711fbb7ecc"3600
TXT"asv=b0d6312d97aa3b7cf0375948a0a8dfc8"3600
TXT"d365mktkey=5zy6zcap8rf59h2tcrocwglkk"3600
TXT"v=spf1 redirect=383h44w7._spf._d.mim.ec"3600
TXT"apple-domain-verification=wr6UhBjRQiqxF2TM"3600
TXT"TMqoXTHBZctkVhubaZv2Q3slJq7ybnXIQ8I7562ahpI="3600
TXT"docusign=190ca22a-d439-4834-90e6-b63b3445bdcc"3600
TXT"docusign=3794bc9a-7005-44cf-81a5-80e64fbe6fa5"3600
TXT"docusign=839c21cc-37de-4c37-a912-593834e95893"3600
TXT"jamf-site-verification=Yq9RvIVfUF2KIgLKxJ4LdA"3600
TXT"bw=jCmFW7Mu5/DGx8tloGZ76tJWk05jRK3FPauKaOM6ttT/"3600
TXT"openai-domain-verification=dv-v9p49bm4tFf7kTchZ9qUOH0d"3600
TXT"miro-verification=a79acd1c76e0e094f6a45623cbe4d5d13de5bdd0"3600
TXT"facebook-domain-verification=pseah17lt1x9r1cz2cba7mnlx966mb"3600
TXT"onetrust-domain-verification=b6a05e838f4545bebdcb04ddfb4ccbcf"3600
TXT"anthropic-domain-verification-4stn1z=vBPunnpfYtE3oaJrKRIMBP4e1"3600
TXT"logmein-verification-code=976afe6f-8039-40e4-95a5-261b462c9a36"3600
TXT"have-i-been-pwned-verification=d79d68f406d0de7f26b055343baeb776"3600
TXT"extensis-domain-verification=451c0b42-b415-451c-9373-6a1f9372b12e"3600
TXT"google-site-verification=0bQUaQQdlGVMOg3XlzRcho8lUrx5ThpIRrWZCQp2c6k"3600
TXT"google-site-verification=0sAKAVtt5dtfHlk204hLSll9NB0lPl1hZ20i3yFa7QU"3600
TXT"google-site-verification=Djad4Ek8u6jc5VLhz_ZsCEAaxqLAFcskkIlFbULx6NI"3600
TXT"google-site-verification=qHANBcJDpCSlB8wkuPHs-7H17FoZn2KJy172JQlCRuw"3600
TXT"google-site-verification=zOkS5eGiqoqc3TkTrIophWAmV9Hh5A4AHDuWkhIyXkc"3600
TXT"globalsign-domain-verification=muqi1mX3u8JwiHuzHPhlCSUQpxtBc0UkQT_7ttxccO"3600
TXT"FsSpdTPo0djnSMWFpBQ5jsmnTbGxn++3y8zP64ECdMRDhpA5U7xB4RuOKe4CXHutxDl2DTdMOFWFBRBk8qYaFA=="3600
TXT"tTVtBUC+ghLF0xAPuBxzVUXuVp7T+joUwfka0CVuv6i8jbudHOZEi0J7eN72WaKJlrEPjR1tk/t8ehm8NnDo+g=="3600
TXT"adobe-idp-site-verification=43f2e9edab68afd152efb003c67e2029801b2cea271b749ba486372dfccf6ea4"3600
TXT"atlassian-domain-verification=Darj04WQsHmE2PQUFHLnksSr1qlOnfb7Jw3iNOKa2Bebr1eNZYo5iJvqdHZSO6RE"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. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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