sendgrid.com

Checked 22 October 2026, 10:40 UTC · via 8.8.8.8
!Passed with warnings
25 passed 4 warnings 0 failed 2 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-04-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
20 April 2009
Last changed
21 October 2026
Expires
20 April 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1389.awsdns-45.org, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.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 2028-04-20 #3
    The registration is valid until 2028-04-20 (545 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

warn

ns-1389.awsdns-45.org, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1389.awsdns-45.org, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com
NS in the zone
ns-1389.awsdns-45.org, ns-2039.awsdns-62.co.uk, ns-506.awsdns-63.com, ns-697.awsdns-23.net
NameserverAddressesNetwork (AS)Glue
ns-1389.awsdns-45.org205.251.197.109 2600:9000:5305:6d00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-2039.awsdns-62.co.uk (zone only)205.251.199.247 2600:9000:5307:f700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-506.awsdns-63.com (zone only)205.251.193.250 2600:9000:5301:fa00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-697.awsdns-23.net (zone only)205.251.194.185 2600:9000:5302:b900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns11.dnsmadeeasy.com (parent only)208.80.124.4 2600:1801:11::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.124.4 2600:1801:11::1
ns12.dnsmadeeasy.com (parent only)208.80.126.4 2600:1802:12::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.126.4 2600:1802:12::1
ns13.dnsmadeeasy.com (parent only)208.80.125.4 2600:1801:13::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.125.4 2600:1801:13::1
ns14.dnsmadeeasy.com (parent only)208.80.127.4 2600:1802:14::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.127.4 2600:1802:14::1
ns15.dnsmadeeasy.com (parent only)208.94.149.4 2600:1800:15::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.94.149.4 2600:1800:15::1

Checks

  • ✓ 6 nameservers #6
    Delegated to ns-1389.awsdns-45.org, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com; only in the zone: ns-2039.awsdns-62.co.uk, ns-506.awsdns-63.com, ns-697.awsdns-23.net. ns-1389.awsdns-45.org, ns-2039.awsdns-62.co.uk, ns-506.awsdns-63.com, ns-697.awsdns-23.net report NS ns-1389.awsdns-45.org ns-2039.awsdns-62.co.uk ns-506.awsdns-63.com ns-697.awsdns-23.net. ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com report NS ns10.dnsmadeeasy.com ns11.dnsmadeeasy.com ns12.dnsmadeeasy.com ns13.dnsmadeeasy.com ns14.dnsmadeeasy.com ns15.dnsmadeeasy.com.
    #7
  • ✓ 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 9 IPv4 /24s and 9 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses; AS16552 (DIGICERT - Tiggee LLC, US): 10 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

18 of 18 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1389.awsdns-45.org 205.251.197.109NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1389.awsdns-45.org 2600:9000:5305:6d00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-2039.awsdns-62.co.uk 205.251.199.247NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-2039.awsdns-62.co.uk 2600:9000:5307:f700::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-506.awsdns-63.com 205.251.193.250NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-506.awsdns-63.com 2600:9000:5301:fa00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-697.awsdns-23.net 205.251.194.185NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-697.awsdns-23.net 2600:9000:5302:b900::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns11.dnsmadeeasy.com 208.80.124.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns11.dnsmadeeasy.com 2600:1801:11::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns12.dnsmadeeasy.com 208.80.126.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns12.dnsmadeeasy.com 2600:1802:12::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns13.dnsmadeeasy.com 208.80.125.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns13.dnsmadeeasy.com 2600:1801:13::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns14.dnsmadeeasy.com 208.80.127.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns14.dnsmadeeasy.com 2600:1802:14::1NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns15.dnsmadeeasy.com 208.94.149.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns15.dnsmadeeasy.com 2600:1800:15::1NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast

Checks

  • ✓ All respond #14
    All 18 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: ns11.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns12.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns13.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns14.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns15.dnsmadeeasy.com: "DNS Made Easy Anycast".
    #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 1 · primary ns-506.awsdns-63.com

Found

Primary (MNAME)
ns-506.awsdns-63.com
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-1389.awsdns-45.org (205.251.197.109)1
ns-1389.awsdns-45.org (2600:9000:5305:6d00::1)1
ns-2039.awsdns-62.co.uk (205.251.199.247)1
ns-2039.awsdns-62.co.uk (2600:9000:5307:f700::1)1
ns-506.awsdns-63.com (205.251.193.250)1
ns-506.awsdns-63.com (2600:9000:5301:fa00::1)1
ns-697.awsdns-23.net (205.251.194.185)1
ns-697.awsdns-23.net (2600:9000:5302:b900::1)1
ns11.dnsmadeeasy.com (208.80.124.4)2011112307
ns11.dnsmadeeasy.com (2600:1801:11::1)2011112307
ns12.dnsmadeeasy.com (208.80.126.4)2011112307
ns12.dnsmadeeasy.com (2600:1802:12::1)2011112307
ns13.dnsmadeeasy.com (208.80.125.4)2011112307
ns13.dnsmadeeasy.com (2600:1801:13::1)2011112307
ns14.dnsmadeeasy.com (208.80.127.4)2011112307
ns14.dnsmadeeasy.com (2600:1802:14::1)2011112307
ns15.dnsmadeeasy.com (208.94.149.4)2011112307
ns15.dnsmadeeasy.com (2600:1800:15::1)2011112307

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 1 on ns-1389.awsdns-45.org (205.251.197.109), ns-1389.awsdns-45.org (2600:9000:5305:6d00::1), ns-2039.awsdns-62.co.uk (205.251.199.247), ns-2039.awsdns-62.co.uk (2600:9000:5307:f700::1), ns-506.awsdns-63.com (205.251.193.250), ns-506.awsdns-63.com (2600:9000:5301:fa00::1), ns-697.awsdns-23.net (205.251.194.185), ns-697.awsdns-23.net (2600:9000:5302:b900::1); 2011112307 on ns11.dnsmadeeasy.com (208.80.124.4), ns11.dnsmadeeasy.com (2600:1801:11::1), ns12.dnsmadeeasy.com (208.80.126.4), ns12.dnsmadeeasy.com (2600:1802:12::1), ns13.dnsmadeeasy.com (208.80.125.4), ns13.dnsmadeeasy.com (2600:1801:13::1), ns14.dnsmadeeasy.com (208.80.127.4), ns14.dnsmadeeasy.com (2600:1802:14::1), ns15.dnsmadeeasy.com (208.94.149.4), ns15.dnsmadeeasy.com (2600:1800:15::1). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-506.awsdns-63.com 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

37 records at the apex

Found

Read from
205.251.197.109:53
TypeValueTTL
SOAns-506.awsdns-63.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1389.awsdns-45.org.172800
NSns-2039.awsdns-62.co.uk.172800
NSns-506.awsdns-63.com.172800
NSns-697.awsdns-23.net.172800
A54.73.47.17090
A52.215.18.390
A18.153.248.4390
A3.67.50.7990
A3.66.59.23290
A3.70.78.17990
A3.123.94.16890
A18.202.70.5690
MX0 smtp.google.com.1800
TXT"48ed3283-0038-4458-8cb0-d2e7d0a4b860"1800
TXT"8mqpm5f9vltr3jvue71slj2j31"1800
TXT"MS=ms77173225"1800
TXT"anthropic-domain-verification-gjxs4q=b0anOdwQdQOCAOZGbpSFZUrIz"1800
TXT"dcacl5d6qbb453nflucim3hi48"1800
TXT"efd3d1covh2tjg32cohdkjof71"1800
TXT"facebook-domain-verification=dfv1zm6tx7ues6olt99mpc58vh49qj"1800
TXT"facebook-domain-verification=jotjcwyly7se4q6c3xsysztxo287s9"1800
TXT"google-site-verification=-BR0U2prX8YJz74uUQygVn22zPdt86Jc5FVd5ZX6xXo"1800
TXT"google-site-verification=gZJHxa9fylVS3VZ3Zl8jPTZesFDJi28bh5PQJujhez8"1800
TXT"knp3gmub9ht14m0lg24j0e5rq1"1800
TXT"loaderio=dc99536e3eb902ffc82885541e224e7c"1800
TXT"ms2jsau3o1f4h802lr68bsb256"1800
TXT"n0mu5saqt0fr95cu201trbacah"1800
TXT"postman-domain-verification=06c6947dd936dddbbfe7a7e5a71b5c984a44e5ce0cadd7a8174320c42fd2f5e2f10e18590d5fbaa5f574df473f2a841a8fc6bcb4fed1ec15254845ba5aad1ab1"1800
TXT"status-page-domain-verification=989qbtpx3q0r"1800
TXT"v=spf1 include:sendgrid.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:stspg-customer.com ip4:167.89.60.95 ip4:50.31.36.205 ~all"1800
CAA0 issue "amazon.com"90
CAA0 issue "globalsign.com"90
CAA0 issue "godaddy.com"90
CAA0 issue "letsencrypt.org"90
CAA0 issue "sectigo.com"90
CAA0 issue "symantec.com"90

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m30s). 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, globalsign.com, godaddy.com, letsencrypt.org, sectigo.com, symantec.com.