sinch.com

Checked 22 October 2026, 10:43 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · Key-Systems GmbH · expires 2026-12-02

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Key-Systems GmbH
Registered
3 December 1997
Last changed
3 December 2025
Expires
2 December 2026
Status
client transfer prohibited
Registry nameservers
ns-1252.awsdns-28.org, ns-1759.awsdns-27.co.uk, ns-417.awsdns-52.com, ns-677.awsdns-20.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 2026-12-02 #3
    The registration is valid until 2026-12-02 (40 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-1252.awsdns-28.org, ns-1759.awsdns-27.co.uk, ns-417.awsdns-52.com, ns-677.awsdns-20.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1252.awsdns-28.org, ns-1759.awsdns-27.co.uk, ns-417.awsdns-52.com, ns-677.awsdns-20.net
NS in the zone
ns-1252.awsdns-28.org, ns-1759.awsdns-27.co.uk, ns-417.awsdns-52.com, ns-677.awsdns-20.net
NameserverAddressesNetwork (AS)Glue
ns-1252.awsdns-28.org205.251.196.228 2600:9000:5304:e400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1759.awsdns-27.co.uk205.251.198.223 2600:9000:5306:df00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-417.awsdns-52.com205.251.193.161 2600:9000:5301:a100::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.161 2600:9000:5301:a100::1
ns-677.awsdns-20.net205.251.194.165 2600:9000:5302:a500::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1252.awsdns-28.org, ns-1759.awsdns-27.co.uk, ns-417.awsdns-52.com, ns-677.awsdns-20.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-1252.awsdns-28.org 205.251.196.228NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1252.awsdns-28.org 2600:9000:5304:e400::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1759.awsdns-27.co.uk 205.251.198.223NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1759.awsdns-27.co.uk 2600:9000:5306:df00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-417.awsdns-52.com 205.251.193.161NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-417.awsdns-52.com 2600:9000:5301:a100::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-677.awsdns-20.net 205.251.194.165NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-677.awsdns-20.net 2600:9000:5302:a500::1NOERROR, 4 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-417.awsdns-52.com

Found

Primary (MNAME)
ns-417.awsdns-52.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-1252.awsdns-28.org (205.251.196.228)1
ns-1252.awsdns-28.org (2600:9000:5304:e400::1)1
ns-1759.awsdns-27.co.uk (205.251.198.223)1
ns-1759.awsdns-27.co.uk (2600:9000:5306:df00::1)1
ns-417.awsdns-52.com (205.251.193.161)1
ns-417.awsdns-52.com (2600:9000:5301:a100::1)1
ns-677.awsdns-20.net (205.251.194.165)1
ns-677.awsdns-20.net (2600:9000:5302:a500::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-417.awsdns-52.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

43 records at the apex

Found

Read from
205.251.196.228:53
TypeValueTTL
SOAns-417.awsdns-52.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1252.awsdns-28.org.172800
NSns-1759.awsdns-27.co.uk.172800
NSns-417.awsdns-52.com.172800
NSns-677.awsdns-20.net.172800
A141.193.213.1160
A141.193.213.1060
MX10 sinch-com.mail.protection.outlook.com.120
TXT"ZOOM_verify_qxC2pDzFNkNEyI5TJd6YN4"60
TXT"anthropic-domain-verification-a7w1ck=7abOnSafXAqTq4lpbidWdzGD0"60
TXT"apple-domain-verification=EBKjQjFsX2bt3lSm"60
TXT"atlassian-domain-verification=uiLUzaYhwokN49RmyFbpkcjFqaoDKbpmGmytCXN1qA1cFHDUldSiZl2KK9KUPBoL"60
TXT"atlassian-sending-domain-verification=698f72f8-fefb-447a-a15f-13db4381fb5d"60
TXT"ca3-ba00822f92e9434e86967fa7fbd861e8"60
TXT"configcat-domain-verification=08da868d-cd2e-4110-8fb6-2d5c4a0d57e9"60
TXT"cursor-domain-verification-3drz3h=U3lUF8VD9lufANyJD4sYB3XKA"60
TXT"docusign=31a5f50e-dc44-4d81-aee1-274fa4fc9da9"60
TXT"docusign=9564f36d-b8af-46a0-906f-1f68bcda570e"60
TXT"google-site-verification=1AB897H9xeHzwV7v3CsIxveOpwuKQ3fPXzEnZCsxZSQ"60
TXT"google-site-verification=3FJCzkehK4EV0UzaVBv-ayJuJJDByKUjV0qyj1-gjvg"60
TXT"google-site-verification=7zRz__OxQNq0JZxbNmwBi8MltfePLuS8JnNvSP4_ae4"60
TXT"google-site-verification=FBw4U9mgPmIxxptHQzvkAg3LdLefr9uoUO07fXHn69Q"60
TXT"google-site-verification=IZpKIcYu3X1A_flxFMjJ23mrplQ6RkTEGiiEO6ApFSU"60
TXT"google-site-verification=_IiyDDsB-BF2uz7-Wnc1oahf7Qj33PKZBS_3_WG43q8"60
TXT"google-site-verification=j5webWiuraIgZAvfAvnb_Jdoikz69vu4QMBnx72XQQY"60
TXT"google-site-verification=weuUpv5Z_edWZfW_4mVZzwG4msnbEOvbc6zhDYeLcAs"60
TXT"gradle-verification=7QV3HLOJSTIPCS03GCS7ALH7IH31N"60
TXT"h1-domain-verification=ycSXNWTD3CT2BXsu3nLnrkDSFqrr3XwHCNHrE2sptH9aokxg"60
TXT"hj-ownership=d4eK3ZaBsmTf"60
TXT"hj-ownership=uB2jyH8AZYbJJ9M9AXw9"60
TXT"jamf-site-verification=Xq4LZRsHpkQHEVKm9vf0tw"60
TXT"mandrill_verify.ra8SPvzrRMrac1usIldKjw"60
TXT"mentimeter-f476da34-3a83-4318-8541-3087b1816eb2"60
TXT"mgverify=6719a707fb6a03434629a9d62801e03ee9f154d510e28c964a02f6d7d966df3e"60
TXT"miro-verification=121329dbcd8a9b88b8c5eccd5a1996ad3cbcfd5b"60
TXT"mongodb-site-verification=doBBe2rQfaYIa0xwqJVVO2xoOIcpyHOg"60
TXT"onetrust-domain-verification=3f99a4e0bd1e495c99d968fe066d08dc"60
TXT"pardot967543=9a741f2ca59f3f8ebbd8fa3b9f57cae4d7d0e52f2e14b1c828d3e66ded923022"60
TXT"postman-domain-verification=617b0805c7fb8afc9740d66f6a49b172ea4fde95e90939b59f43e4f342e30634fdfda3b142d3de78218ae28367b13319a377ff8cda9010f34f4f18ee8f71a0b4"60
TXT"segment-site-verification=7rLPEgezJwfBRnFFIPKYQdTA6hqVC30Q"60
TXT"smartsheet-site-validation=o7IhLBX8bTCaIkuKVXHfBpztA5VCRAK3"60
TXT"v=spf1 ip4:52.51.255.123 ip4:52.169.106.207 ip4:213.242.88.0/24 ip4:200.143.186.160/28 ip4:194.218.202.240/28 ip4:193.151.46.0/23 ip4:189.125.75.128/28 ip4:168.245.19.11 ip4:185.32.76.5 ip4:185.250.238.229 ip4:205.218.33.30 " "ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:52.82.172.0/22 ip4:141.193.32.19 ip4:72.35.23.0/24 " "ip4:72.35.12.0/24 ip4:192.162.216.0/22 ip4:208.70.128.0/21 ip4:185.38.180.0/22 ip4:89.104.206.0/23 ip4:3.211.161.173 ip4:52.21.142.91 ip4:34.227.209.168 " "ip6:2a01:77c0:1180::/46 ip6:2a01:77c0:1619::/48 ip6:2a01:77c0:7135::/48 ip6:2a01:77c0:6::/47 ip6:2001:978:2a01:0:6:0:1089:1091/128 " "ip6:2001:978:2a01:0:6:0:1089:1092/128 include:spf.protection.outlook.com include:_spf.mailgun.org include:_spf.eu.mailgun.org include:mailanyone.net include:et._spf.pardot.com include:_spf.cmail.ondemand.com ~all"60
TXT"vN+25vR1IbeCzHeidJBQnqu6nVxOZTF9x3Mo4mnNeXZ9gUjpSfBPk9zAJgg1OoUyJZzV3AyEVS2a6XBxZufxVw=="60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (2m). 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