Domain report: teachable.com

Registration

info

.com generic · Amazon Registrar, Inc. · expires 2027-04-14

Found

TLD: .com (generic)
ICANN policies apply: yes
Registrar: Amazon Registrar, Inc.
Registered: 14 April 2003
Last changed: 15 May 2026
Expires: 14 April 2027
Status: client transfer prohibited
Registry nameservers: ian.ns.cloudflare.com, nina.ns.cloudflare.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 2027-04-14 #3

The registration is valid until 2027-04-14 (174 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

ian.ns.cloudflare.com, nina.ns.cloudflare.com

Found

Parent zone: com
Delegation from: a.gtld-servers.net (192.5.6.30)
NS at the parent: ian.ns.cloudflare.com, nina.ns.cloudflare.com
NS in the zone: ian.ns.cloudflare.com, nina.ns.cloudflare.com

Nameserver	Addresses	Network (AS)	Glue
ian.ns.cloudflare.com	173.245.59.118 172.64.33.118 108.162.193.118 2803:f800:50::6ca2:c176 2a06:98c1:50::ac40:2176 2606:4700:58::adf5:3b76	AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US	108.162.193.118 172.64.33.118 173.245.59.118 2606:4700:58::adf5:3b76 2803:f800:50::6ca2:c176 2a06:98c1:50::ac40:2176
nina.ns.cloudflare.com	172.64.32.136 173.245.58.136 108.162.192.136 2803:f800:50::6ca2:c088 2a06:98c1:50::ac40:2088 2606:4700:50::adf5:3a88	AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US	108.162.192.136 172.64.32.136 173.245.58.136 2606:4700:50::adf5:3a88 2803:f800:50::6ca2:c088 2a06:98c1:50::ac40:2088

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ian.ns.cloudflare.com, nina.ns.cloudflare.com.

#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 6 IPv4 /24s and 4 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ian.ns.cloudflare.com 173.245.59.118	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
ian.ns.cloudflare.com 172.64.33.118	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
ian.ns.cloudflare.com 108.162.193.118	NOERROR, 4 ms, authoritative	no	yes / yes	refused	2026.10.2
ian.ns.cloudflare.com 2803:f800:50::6ca2:c176	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
ian.ns.cloudflare.com 2a06:98c1:50::ac40:2176	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
ian.ns.cloudflare.com 2606:4700:58::adf5:3b76	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
nina.ns.cloudflare.com 172.64.32.136	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
nina.ns.cloudflare.com 173.245.58.136	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
nina.ns.cloudflare.com 108.162.192.136	NOERROR, 5 ms, authoritative	no	yes / yes	refused	2026.10.2
nina.ns.cloudflare.com 2803:f800:50::6ca2:c088	NOERROR, 11 ms, authoritative	no	yes / yes	refused	2026.10.2
nina.ns.cloudflare.com 2a06:98c1:50::ac40:2088	NOERROR, 10 ms, authoritative	no	yes / yes	refused	2026.10.2
nina.ns.cloudflare.com 2606:4700:50::adf5:3a88	NOERROR, 10 ms, authoritative	no	yes / yes	refused	2026.10.2

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: ian.ns.cloudflare.com: "2026.10.2"; nina.ns.cloudflare.com: "2026.10.2". 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 2416899225 · primary ian.ns.cloudflare.com

Found

Primary (MNAME): ian.ns.cloudflare.com
Contact (RNAME): dns.cloudflare.com
Serial: 2416899225
Refresh / retry: 10000 s / 2400 s
Expire: 604800 s
Negative TTL: 1800 s

Serial per nameserver

Nameserver	Serial
ian.ns.cloudflare.com (173.245.59.118)	2416899225
ian.ns.cloudflare.com (172.64.33.118)	2416899225
ian.ns.cloudflare.com (108.162.193.118)	2416899225
ian.ns.cloudflare.com (2803:f800:50::6ca2:c176)	2416899225
ian.ns.cloudflare.com (2a06:98c1:50::ac40:2176)	2416899225
ian.ns.cloudflare.com (2606:4700:58::adf5:3b76)	2416899225
nina.ns.cloudflare.com (172.64.32.136)	2416899225
nina.ns.cloudflare.com (173.245.58.136)	2416899225
nina.ns.cloudflare.com (108.162.192.136)	2416899225
nina.ns.cloudflare.com (2803:f800:50::6ca2:c088)	2416899225
nina.ns.cloudflare.com (2a06:98c1:50::ac40:2088)	2416899225
nina.ns.cloudflare.com (2606:4700:50::adf5:3a88)	2416899225

Checks

✓ Serial 2416899225 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
✓ Primary is a public nameserver #24

The primary nameserver ian.ns.cloudflare.com is one of the listed nameservers.
✓ Contact dns@cloudflare.com #25

The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
✓ Timestamp serial #26

The serial 2416899225 is a Unix timestamp (2046-08-03 08:53 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

info

70 records at the apex

Found

Read from: 173.245.59.118:53

Type	Value	TTL
SOA	ian.ns.cloudflare.com. dns.cloudflare.com. 2416899225 10000 2400 604800 1800	1800
NS	ian.ns.cloudflare.com.	86400
NS	nina.ns.cloudflare.com.	86400
A	198.202.211.1	300
MX	1 aspmx.l.google.com.	300
MX	10 alt3.aspmx.l.google.com.	300
MX	10 alt4.aspmx.l.google.com.	300
MX	5 alt1.aspmx.l.google.com.	300
MX	5 alt2.aspmx.l.google.com.	300
TXT	"A52B1579E6"	120
TXT	"MS=ms46309658"	120
TXT	"MS=ms78296269"	120
TXT	"QuoVadis=feba1d66-ea2f-40c4-9681-143442022cab"	120
TXT	"ZOOM_verify_NG8JJfDLmTkqN4qjXE5DZh"	120
TXT	"ambassador-portals-herokuapp"	120
TXT	"anthropic-domain-verification-70zj35=ReJuRTdgeCwK7K5zyWbi3aCmB"	120
TXT	"apple-domain-verification=kcN2dcIuE6b07BgF"	120
TXT	"asv=c51ca35fbb7757e5a6f0189deab2fb58"	120
TXT	"atlassian-domain-verification=ESx5jS7H0NuVg0RqhI/1FhVKZnGfWOBfbjHRR+ll2Vc9gqeFZMH+UYiMEUffQVx9"	120
TXT	"atlassian-domain-verification=a9zEXCx1WsxRai9qeugknkTX2TV2ZRFywviwa7VbszMrReqWCSSghfkWl650QqEw"	120
TXT	"f2fnmke27g9bndg2f7de9bseh2"	120
TXT	"facebook-domain-verification=b6jirvkk1tilh9t8e1q57bh6b12s5x"	120
TXT	"firebase=teachable-webinar"	120
TXT	"globalsign-domain-verification=vVNUJEiPJniKDdoWicJuKMf9V52-vb9KovoAIiiida"	120
TXT	"google-site-verification=-dkPR93_MrFSt8aPZGAqIXul1EZpImnubVUphDThJDE"	120
TXT	"google-site-verification=-lHHXk1MJFS7GNHGxz9HcrQ5Hrf_rXVpfbRP2J1wPyA"	120
TXT	"google-site-verification=KuUrdPRv6-JotHpZjJF7Tw8oKUdXDLolfB9C4k_qwSA"	120
TXT	"google-site-verification=UtoyLIOCl7-JrUxpGD2RLbxGmBr5Lt-wVQqfOGBzr5A"	120
TXT	"google-site-verification=XxQdRDFEuE3ogqMfmEMZMnHTqg5KlNGF0Hos6fnaR-A"	120
TXT	"google-site-verification=lz55OpUkDlIAbssMq5j6w7Q3TImgYsatyg6Fws8fIkQ"	120
TXT	"google-site-verification=ow9HKkznXRHS4XhYL1Gfab5TQRz15gZbTczSInjX7ZU"	120
TXT	"google-site-verification=xt5p8RRZL20KTDvpDiLVYmWfUO_VTyhuD9fz5vxtzZA"	120
TXT	"google-site-verification=zS47T5jl0nSkNVgu8qCmj87R8YIZ-9H5oQNfbwsXIt0"	120
TXT	"h1-domain-verification=xbXGwB1ZYgw5WHW5qfLj8zpYoYC2F7TX6ATcpReVWRrNeJGj"	120
TXT	"have-i-been-pwned-verification=e29ac28e032e14176264d184461fe34a"	120
TXT	"mgverify=fdb0e4ab358548550e996faf8ce8baa3935f2caee833d7408b5d89cb2b933549"	120
TXT	"miro-verification=fb5d52859a00082e01344fb4b074f7f6b2754326"	120
TXT	"oacnl1dda6tcm54pe1mm0s7n4b"	120
TXT	"proxy.webflow.com"	120
TXT	"ps-cd-verification=f8d92b21-825e-4b5d-9dcc-e78fdd5c1aea"	120
TXT	"rt5kk15rl1b081jo9q65p4a62"	120
TXT	"stripe-verification=1a64c5fdd4ee26490d82ef5ee20be2e13eeacfe52a411ba2be9442509f4a1e3f"	120
TXT	"stripe-verification=6FD22B73E07DA0F1A55DE56B8AD7C3F286222B010A42F3CE40999F4B2EC28996"	120
TXT	"stripe-verification=947db08420734c6564dbef86cd766deb88a724a9014d73900cf8ad125851c65a"	120
TXT	"stripe-verification=99e5b79db397a21ae18c991ecf52712d9e16b18db57319c2dccf2f9104b4428f"	120
TXT	"stripe-verification=dae8649612417f93f7c10abb4fb37a5be02d6a6e6ea56c03d577bd7c0c5d199e"	120
TXT	"v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ip6:fdaa:50fa:a9ce::/48 ip4:209.85.220.54 include:50445500.spf06.hubspotemail.net -all"	120
TXT	"zoom-domain-verification=c548cc54-1209-4bcc-929e-9aebef6e1ebb"	120
CAA	0 issue "amazon.com"	300
CAA	0 issue "amazonaws.com"	300
CAA	0 issue "amazontrust.com"	300
CAA	0 issue "awstrust.com"	300
CAA	0 issue "comodoca.com"	300
CAA	0 issue "digicert.com; cansignhttpexchanges=yes"	300
CAA	0 issue "godaddy.com"	300
CAA	0 issue "letsencrypt.org"	300
CAA	0 issue "pki.goog; cansignhttpexchanges=yes"	300
CAA	0 issue "sectigo.com"	300
CAA	0 issue "ssl.com"	300
CAA	0 issuewild "amazon.com"	300
CAA	0 issuewild "amazonaws.com"	300
CAA	0 issuewild "amazontrust.com"	300
CAA	0 issuewild "awstrust.com"	300
CAA	0 issuewild "comodoca.com"	300
CAA	0 issuewild "digicert.com; cansignhttpexchanges=yes"	300
CAA	0 issuewild "godaddy.com"	300
CAA	0 issuewild "letsencrypt.org"	300
CAA	0 issuewild "pki.goog; cansignhttpexchanges=yes"	300
CAA	0 issuewild "sectigo.com"	300
CAA	0 issuewild "ssl.com"	300

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 5m, 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.
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
✓ CAA restricts issuance #35

Certificates may be issued by: amazon.com, amazonaws.com, amazontrust.com, awstrust.com, comodoca.com, digicert.com, godaddy.com, letsencrypt.org, pki.goog, sectigo.com, ssl.com.