trello.com

Checked 22 October 2026, 11:12 UTC · via 8.8.8.8
!Passed with warnings
28 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-06-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
20 August 2004
Last changed
22 October 2026
Expires
1 June 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1442.awsdns-52.org, ns-2013.awsdns-59.co.uk, ns-402.awsdns-50.com, ns-722.awsdns-26.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 2027-06-01 #3
    The registration is valid until 2027-06-01 (222 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

ns-1442.awsdns-52.org, ns-2013.awsdns-59.co.uk, ns-402.awsdns-50.com, ns-722.awsdns-26.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1442.awsdns-52.org, ns-2013.awsdns-59.co.uk, ns-402.awsdns-50.com, ns-722.awsdns-26.net
NS in the zone
ns-1442.awsdns-52.org, ns-2013.awsdns-59.co.uk, ns-402.awsdns-50.com, ns-722.awsdns-26.net
NameserverAddressesNetwork (AS)Glue
ns-1442.awsdns-52.org205.251.197.162 2600:9000:5305:a200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-2013.awsdns-59.co.uk205.251.199.221 2600:9000:5307:dd00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-402.awsdns-50.com205.251.193.146 2600:9000:5301:9200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.146 2600:9000:5301:9200::1
ns-722.awsdns-26.net205.251.194.210 2600:9000:5302:d200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1442.awsdns-52.org, ns-2013.awsdns-59.co.uk, ns-402.awsdns-50.com, ns-722.awsdns-26.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-1442.awsdns-52.org 205.251.197.162NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1442.awsdns-52.org 2600:9000:5305:a200::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-2013.awsdns-59.co.uk 205.251.199.221NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-2013.awsdns-59.co.uk 2600:9000:5307:dd00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-402.awsdns-50.com 205.251.193.146NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-402.awsdns-50.com 2600:9000:5301:9200::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-722.awsdns-26.net 205.251.194.210NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-722.awsdns-26.net 2600:9000:5302:d200::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

warn

serial 1 · primary ns-1442.awsdns-52.org

Found

Primary (MNAME)
ns-1442.awsdns-52.org
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
120 s

Serial per nameserver

NameserverSerial
ns-1442.awsdns-52.org (205.251.197.162)1
ns-1442.awsdns-52.org (2600:9000:5305:a200::1)1
ns-2013.awsdns-59.co.uk (205.251.199.221)1
ns-2013.awsdns-59.co.uk (2600:9000:5307:dd00::1)1
ns-402.awsdns-50.com (205.251.193.146)1
ns-402.awsdns-50.com (2600:9000:5301:9200::1)1
ns-722.awsdns-26.net (205.251.194.210)1
ns-722.awsdns-26.net (2600:9000:5302:d200::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 2m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 2h, retry 15m, expire 14d, negative TTL 2m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1442.awsdns-52.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

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
55691ECDSAP256SHA256 (13)SHA256 FE52A4B971D20B12…yes

DNSKEY in the zone

Key tagRoleAlgorithm
57856ZSK (256)ECDSAP256SHA256 (13)
52674ZSK (256)ECDSAP256SHA256 (13)
55691KSK (257)ECDSAP256SHA256 (13)
4631KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 55691 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 11h0m0s and created on demand; the current one was made at 2026-10-22 07:00 UTC and expires at 2026-10-22 18:00 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

25 records at the apex

Found

Read from
205.251.197.162:53
TypeValueTTL
SOAns-1442.awsdns-52.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 12086400
NSns-1442.awsdns-52.org.86400
NSns-2013.awsdns-59.co.uk.86400
NSns-402.awsdns-50.com.86400
NSns-722.awsdns-26.net.86400
A18.66.112.9360
A18.66.112.9160
A18.66.112.3960
A18.66.112.4260
MX10 mxa-001d9801.gslb.pphosted.com.300
MX10 mxb-001d9801.gslb.pphosted.com.300
TXT"atlassian-domain-verification=ZRphniOpyvhHV76mRmxnLkHJVrKnbeOIxmhbxb8PF6AarX0FypthxYB/r5XpVC2E"300
TXT"facebook-domain-verification=5g7n6qixu6oqonzuw4igcyn2fd52yi"300
TXT"google-site-verification=L1Pv1rpciXhbLcwV1z84F6fdeNpGMIDd4nrgAzCQncc"300
TXT"google-site-verification=UqQbR3bkx0DW0mTjn4zpy-pFaTOtklFFLgVJPLpWBfg"300
TXT"google-site-verification=XiTuMrGYNDAcJ3h6FgJn-qK1wWhcRCTrwK7ihP4lgzQ"300
TXT"google-site-verification=dk_f7jMXJqZs_HAQ5Qvd1LMExtsW6rL0_3vK6wMWxyM"300
TXT"google-site-verification=j10V2FxDCOpk-ZtvXbt0csUYbGo4uttk0VIeNN3pMwQ"300
TXT"google-site-verification=klLlb7yZqSKsDzIEQ_Ck9G8vJZrZUYSl7G6SYm5ugaU"300
TXT"google-site-verification=lFRc2QYcvrD1x-JP-sbqyEHEVFTzLiYr_s5TMwqDPGE"300
TXT"google-site-verification=m3SBLzut__3UbFT85xIcXyZs4CsOKfX6MrdByMh6xSM"300
TXT"google-site-verification=rSOg_zfvrFkmPwI-Yg4oLj8SNdFQnPCeo9a0GtDf_y4"300
TXT"mailru-verification: 26cd15930108c82c"300
TXT"slack-domain-verification=IQyaWt1Bt2nVwCvOsgj2ObAap344ynM5bV6C8zlZ"300
TXT"v=spf1 include:_spf.google.com include:_spf.salesforce.com include:spemail.trello.com include:cust-spf.exacttarget.com include:amazonses.com -all"300

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