teacherspayteachers.com

Checked 22 October 2026, 10:55 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · 101domain GRS Limited · expires 2027-11-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
101domain GRS Limited
Registered
1 November 2005
Last changed
3 September 2026
Expires
1 November 2027
Status
client transfer prohibited
Registry nameservers
ns-1182.awsdns-19.org, ns-1802.awsdns-33.co.uk, ns-489.awsdns-61.com, ns-552.awsdns-05.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 2027-11-01 #3
    The registration is valid until 2027-11-01 (375 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

info

ns-1182.awsdns-19.org, ns-1802.awsdns-33.co.uk, ns-489.awsdns-61.com, ns-552.awsdns-05.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1182.awsdns-19.org, ns-1802.awsdns-33.co.uk, ns-489.awsdns-61.com, ns-552.awsdns-05.net
NS in the zone
ns-1182.awsdns-19.org, ns-1802.awsdns-33.co.uk, ns-489.awsdns-61.com, ns-552.awsdns-05.net
NameserverAddressesNetwork (AS)Glue
ns-1182.awsdns-19.org205.251.196.158 2600:9000:5304:9e00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1802.awsdns-33.co.uk205.251.199.10 2600:9000:5307:a00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-489.awsdns-61.com205.251.193.233 2600:9000:5301:e900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.233 2600:9000:5301:e900::1
ns-552.awsdns-05.net205.251.194.40 2600:9000:5302:2800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1182.awsdns-19.org, ns-1802.awsdns-33.co.uk, ns-489.awsdns-61.com, ns-552.awsdns-05.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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1182.awsdns-19.org 205.251.196.158NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1182.awsdns-19.org 2600:9000:5304:9e00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1802.awsdns-33.co.uk 205.251.199.10NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1802.awsdns-33.co.uk 2600:9000:5307:a00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-489.awsdns-61.com 205.251.193.233NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-489.awsdns-61.com 2600:9000:5301:e900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-552.awsdns-05.net 205.251.194.40NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-552.awsdns-05.net 2600:9000:5302:2800::1NOERROR, 5 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 1 · primary ns-1182.awsdns-19.org

Found

Primary (MNAME)
ns-1182.awsdns-19.org
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-1182.awsdns-19.org (205.251.196.158)1
ns-1182.awsdns-19.org (2600:9000:5304:9e00::1)1
ns-1802.awsdns-33.co.uk (205.251.199.10)1
ns-1802.awsdns-33.co.uk (2600:9000:5307:a00::1)1
ns-489.awsdns-61.com (205.251.193.233)1
ns-489.awsdns-61.com (2600:9000:5301:e900::1)1
ns-552.awsdns-05.net (205.251.194.40)1
ns-552.awsdns-05.net (2600:9000:5302:2800::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1182.awsdns-19.org is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

31 records at the apex

Found

Read from
205.251.196.158:53
TypeValueTTL
SOAns-1182.awsdns-19.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1182.awsdns-19.org.172800
NSns-1802.awsdns-33.co.uk.172800
NSns-489.awsdns-61.com.172800
NSns-552.awsdns-05.net.172800
A52.203.78.4160
A100.50.8.13260
A100.57.103.11460
A100.58.39.1560
MX1 mxa.global.inbound.cf-emailsecurity.net.900
MX5 mxb.global.inbound.cf-emailsecurity.net.900
TXT"MS=ms39073514"900
TXT"apple-domain-verification=-t6XgxGcqvLZ2Gis4mvchrzXMCITMAfWlnfFehvaKm4"900
TXT"atlassian-domain-verification=0oZoDzrB/ItUqdLnhyLp0e5aJW/JaRX1acbofl7yZYPl15F0tSMrxbCPiNdInfX1"900
TXT"atlassian-domain-verification=WiwD1OV2Q2VVrExmG4m4K16jNi1I3/VwW/q54wj+dJ/6kFF+yOtKcnd6L8dl3lIp"900
TXT"blitz=mu-821eb48a-6471999d-9ab2e2b4-ac091390"900
TXT"ca3-8116470552124982aadd9bec8eeadb56"900
TXT"docusign=7ec572b8-4c56-401d-a82a-c16ee4116228"900
TXT"facebook-domain-verification=uih7a8k3lkimb7ojkdmsa0nxno9h50"900
TXT"google-site-verification=23gKG5KMthiNOzIO0AaivsIJ61L5gNxqHt4p0tX0XyY"900
TXT"google-site-verification=APUPES-oZMiRqLKW3oNcKp715rO7hh0hJFiUVIY7giM"900
TXT"google-site-verification=RayeNbaxMLBHpt0Tc2mQRmb0vZDRtW-Y9RgG2doEvqw"900
TXT"google-site-verification=Rv27pa3KseHrahQ1lD7EVNr7rn3quBBnbFbAyuIkFV8"900
TXT"google-site-verification=TEUclUwYmKFyIvguaYAmV5utnhQ1u3odFB8E95RKzXA"900
TXT"google-site-verification=_ycPdftqUqhlTIwpIECdnpLOr2K3kJ7cnaMfGrRDqqM"900
TXT"google-site-verification=cx9fZfG1oredtrkCpEwVnZFA9N6z3a7fLwHA9Ylc8KY"900
TXT"google-site-verification=d1zEDEPkFcxAiOdR--5_RCXDn6aVYMRVWapYyAd_sPk"900
TXT"google-site-verification=d2N5mxNKGFPu1lqvDWawYFvjIgTneEpzhB_PwvbixuM"900
TXT"google-site-verification=hi_uDIQHFr0rFF5RzYUjM615HOEF4scFMS_Bef2V9xA"900
TXT"v=spf1 redirect=teacherspayteachers.com.hosted.spf-report.com"900
TXT"yahoo-verification-key=mJXo/ulIfqQgAp1xpwU5X79/8jAUXZg9TXwV0JxOeVw="900

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.
    #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