monzo.com

Checked 22 October 2026, 09:52 UTC · via 8.8.8.8
!Passed with warnings
28 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Amazon Registrar, Inc. · expires 2027-01-11

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Amazon Registrar, Inc.
Registered
19 January 1998
Last changed
14 May 2026
Expires
11 January 2027
Status
client transfer prohibited
Registry nameservers
curt.ns.cloudflare.com, kara.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 2027-01-11 #3
    The registration is valid until 2027-01-11 (80 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

curt.ns.cloudflare.com, kara.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
curt.ns.cloudflare.com, kara.ns.cloudflare.com
NS in the zone
curt.ns.cloudflare.com, kara.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
curt.ns.cloudflare.com172.64.33.94 108.162.193.94 173.245.59.94 2606:4700:58::adf5:3b5e 2a06:98c1:50::ac40:215e 2803:f800:50::6ca2:c15eAS13335 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., US108.162.193.94 172.64.33.94 173.245.59.94 2606:4700:58::adf5:3b5e 2803:f800:50::6ca2:c15e 2a06:98c1:50::ac40:215e
kara.ns.cloudflare.com172.64.32.123 108.162.192.123 173.245.58.123 2a06:98c1:50::ac40:207b 2803:f800:50::6ca2:c07b 2606:4700:50::adf5:3a7bAS13335 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., US108.162.192.123 172.64.32.123 173.245.58.123 2606:4700:50::adf5:3a7b 2803:f800:50::6ca2:c07b 2a06:98c1:50::ac40:207b

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: curt.ns.cloudflare.com, kara.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

NameserverAnswerRecursionTCP / EDNSAXFRVersion
curt.ns.cloudflare.com 172.64.33.94NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
curt.ns.cloudflare.com 108.162.193.94NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
curt.ns.cloudflare.com 173.245.59.94NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
curt.ns.cloudflare.com 2606:4700:58::adf5:3b5eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
curt.ns.cloudflare.com 2a06:98c1:50::ac40:215eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
curt.ns.cloudflare.com 2803:f800:50::6ca2:c15eNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 172.64.32.123NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 108.162.192.123NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 173.245.58.123NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 2a06:98c1:50::ac40:207bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 2803:f800:50::6ca2:c07bNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
kara.ns.cloudflare.com 2606:4700:50::adf5:3a7bNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2

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: curt.ns.cloudflare.com: "2026.10.2"; kara.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 2417821304 · primary curt.ns.cloudflare.com

Found

Primary (MNAME)
curt.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417821304
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
curt.ns.cloudflare.com (172.64.33.94)2417821304
curt.ns.cloudflare.com (108.162.193.94)2417821304
curt.ns.cloudflare.com (173.245.59.94)2417821304
curt.ns.cloudflare.com (2606:4700:58::adf5:3b5e)2417821304
curt.ns.cloudflare.com (2a06:98c1:50::ac40:215e)2417821304
curt.ns.cloudflare.com (2803:f800:50::6ca2:c15e)2417821304
kara.ns.cloudflare.com (172.64.32.123)2417821304
kara.ns.cloudflare.com (108.162.192.123)2417821304
kara.ns.cloudflare.com (173.245.58.123)2417821304
kara.ns.cloudflare.com (2a06:98c1:50::ac40:207b)2417821304
kara.ns.cloudflare.com (2803:f800:50::6ca2:c07b)2417821304
kara.ns.cloudflare.com (2606:4700:50::adf5:3a7b)2417821304

Checks

  • ✓ Serial 2417821304 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 curt.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 2417821304 is a Unix timestamp (2046-08-14 01:01 UTC).

DNSSEC

info

Signed, DS published at parent

Found

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

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 019809DBBDF92435…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)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 2371 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-21 08:52 UTC and expires at 2026-10-23 10:52 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

57 records at the apex

Found

Read from
172.64.33.94:53
TypeValueTTL
SOAcurt.ns.cloudflare.com. dns.cloudflare.com. 2417821304 10000 2400 604800 18001800
NScurt.ns.cloudflare.com.86400
NSkara.ns.cloudflare.com.86400
A18.164.52.12257
A18.164.52.12657
A18.164.52.11257
A18.164.52.9757
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"DirectFedAuthUrl=https://login.internal.monzo.com/app/monzo_verint_1/exk40p8cdem6X3h5z417/sso/saml"300
TXT"MS=ms42758514"300
TXT"Whimsical = f4d56845866614ff1b2a9533e9091d11babbc9ea"300
TXT"ZOOM_verify_3piG8whx5suoIqhGryvU4F"300
TXT"_a8f6gh0svyn7ms90tsmiq6t926kbz8h"300
TXT"_lrf6crxzukkkaj295we5qsbnlemnj40"300
TXT"_zfvqarc8kx61q1nj1gxynb356cn2dgo"300
TXT"adobe-idp-site-verification=592c9edf9a90075970a1ff66610d225d1ded6877bf6763047e30582cfb30e230"300
TXT"ahrefs-site-verification_062eeff1447ff0c24d3f8710ab68a113c003a5fc2088103d537827dd4ada3972"300
TXT"anthropic-domain-verification-ns7yd5=VVWWin5m3PbFnKVrA6PLu9GEe"300
TXT"apple-domain-verification=6FeuQrjFyfEhqruT"300
TXT"atlassian-domain-verification=7bRv5l1YU8jBdMRJIiEu6pjKomzH4JShoN5AOa9BclQpqX4GdvDCQ0BTkIW8JKTM"300
TXT"cisco-ci-domain-verification=7b0a57633679838ae6972aadae4a229bf0368957bdc3e8d7362837f497552abf"300
TXT"cursor-domain-verification-x97aw0=47Q0pG60YngCFELdu140rJWTP"300
TXT"docker-verification=5e92272f-e386-4517-98c4-8f46af60c853"300
TXT"docusign=e7a72e83-f8ec-426d-bdd1-d6da56e11b94"300
TXT"dropbox-domain-verification=8oe284lsghmp"300
TXT"gdv=38a18585"300
TXT"google-site-verification=Lc4fSDIureqag1hJdW3dRmER4mpe2JHl2GwZrfZdPyE"300
TXT"google-site-verification=SxB2H05EJ_gvZPkMrdR0Q9K6yUR4vDSifrsPa0jSsHo"300
TXT"google-site-verification=r5NnG1LjAXyv8COQst-HOUVgGjydRAPDrUy1GLZCQpU"300
TXT"google-site-verification=xMawR2mAg4Ic3NAgT5g4sj_k5Q5qO2YeRfkVpsVxR6U"300
TXT"h1-domain-verification=kTLAojUZ4tXqVAPfjRdmjo9eptcMD9eVGPAE1F3DEg6PARsq"300
TXT"jamf-site-verification=8WpbuFXiBMH5oGrm9YJpcA"300
TXT"linear-domain-verification=rmjwgyxbn46z"300
TXT"mgverify=0e494b5877331162132317959e7b2159d49570e147d103789be661ae88f1e7e4"300
TXT"openai-domain-verification=dv-wJi3rCztFV8hZ3J85F8ROyMy"300
TXT"parallels-domain-verification=1d38eaa4532443bfa227463bef474019afb4c7cedc8b45e2b524bd81a01bccd9"300
TXT"stripe-verification=EB1AB1CDEE7FD561490376A6859FEACBA04E1BDECB2A4FF469FCC57765821946"300
TXT"stripe-verification=c8a1d595767023c6b01141a3b801fe3adc3f8fd31809afdad30178dab3d37d10"300
TXT"v=spf1 include:_spf.google.com include:amazonses.com include:_spf.mailgun.monzo.com -all"300
CAA0 iodef "mailto:security@monzo.com"300
CAA0 issue "amazon.com"300
CAA0 issue "buypass.com"300
CAA0 issue "comodoca.com"300
CAA0 issue "digicert.com; cansignhttpexchanges=yes"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "pki.goog; cansignhttpexchanges=yes"300
CAA0 issue "ssl.com"300
CAA0 issuewild "amazon.com"300
CAA0 issuewild "comodoca.com"300
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"300
CAA0 issuewild "letsencrypt.org"300
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"300
CAA0 issuewild "ssl.com"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (57s). 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.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, buypass.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.