singaporeair.com

Checked 22 October 2026, 10:43 UTC · via 8.8.8.8
!Passed with warnings
28 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-03-17

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
16 March 1995
Last changed
22 May 2026
Expires
17 March 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a1-247.akam.net, a12-64.akam.net, a13-65.akam.net, a18-66.akam.net, a20-67.akam.net, a7-64.akam.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 2027-03-17 #3
    The registration is valid until 2027-03-17 (145 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

a1-247.akam.net, a12-64.akam.net, a13-65.akam.net, a18-66.akam.net, a20-67.akam.net, a7-64.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-247.akam.net, a12-64.akam.net, a13-65.akam.net, a18-66.akam.net, a20-67.akam.net, a7-64.akam.net
NS in the zone
a1-247.akam.net, a12-64.akam.net, a13-65.akam.net, a18-66.akam.net, a20-67.akam.net, a7-64.akam.net
NameserverAddressesNetwork (AS)Glue
a1-247.akam.net193.108.91.247 2600:1401:2::f7AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a12-64.akam.net184.26.160.64 2600:1480:f000::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-65.akam.net2.22.230.65 2600:1480:800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a18-66.akam.net95.101.36.66 2600:1480:4800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-67.akam.net95.100.175.67 2a02:26f0:67::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-64.akam.net23.61.199.64 2600:1406:32::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-247.akam.net, a12-64.akam.net, a13-65.akam.net, a18-66.akam.net, a20-67.akam.net, a7-64.akam.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 6 IPv4 /24s and 6 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 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 .net
    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
a1-247.akam.net 193.108.91.247NOERROR, 5 ms, authoritativenoyes / yesrefused41824.6
a1-247.akam.net 2600:1401:2::f7NOERROR, 5 ms, authoritativenoyes / yesrefused41824.5
a12-64.akam.net 184.26.160.64NOERROR, 5 ms, authoritativenoyes / yesrefused48878.31
a12-64.akam.net 2600:1480:f000::40NOERROR, 5 ms, authoritativenoyes / yesrefused48878.33
a13-65.akam.net 2.22.230.65NOERROR, 5 ms, authoritativenoyes / yesrefused41824.10
a13-65.akam.net 2600:1480:800::41NOERROR, 5 ms, authoritativenoyes / yesrefused41824.6
a18-66.akam.net 95.101.36.66NOERROR, 6 ms, authoritativenoyes / yesrefused48878.32
a18-66.akam.net 2600:1480:4800::42NOERROR, 5 ms, authoritativenoyes / yesrefused48878.29
a20-67.akam.net 95.100.175.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a20-67.akam.net 2a02:26f0:67::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a7-64.akam.net 23.61.199.64NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a7-64.akam.net 2600:1406:32::40NOERROR, 5 ms, authoritativenoyes / yesrefused41824.9

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: a1-247.akam.net: "41824.6"; a1-247.akam.net: "41824.5"; a12-64.akam.net: "48878.31"; a12-64.akam.net: "48878.33"; a13-65.akam.net: "41824.10"; a13-65.akam.net: "41824.6"; a18-66.akam.net: "48878.32"; a18-66.akam.net: "48878.29"; a20-67.akam.net: "48878.33"; a7-64.akam.net: "41824.4"; a7-64.akam.net: "41824.9". 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

info

serial 2026092802 · primary ns1.sq.com.sg

Found

Primary (MNAME)
ns1.sq.com.sg
Contact (RNAME)
networkoperations.singaporeair.com.sg
Serial
2026092802
Refresh / retry
10800 s / 3600 s
Expire
2592000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
a1-247.akam.net (193.108.91.247)2026092802
a1-247.akam.net (2600:1401:2::f7)2026092802
a12-64.akam.net (184.26.160.64)2026092802
a12-64.akam.net (2600:1480:f000::40)2026092802
a13-65.akam.net (2.22.230.65)2026092802
a13-65.akam.net (2600:1480:800::41)2026092802
a18-66.akam.net (95.101.36.66)2026092802
a18-66.akam.net (2600:1480:4800::42)2026092802
a20-67.akam.net (95.100.175.67)2026092802
a20-67.akam.net (2a02:26f0:67::43)2026092802
a7-64.akam.net (23.61.199.64)2026092802
a7-64.akam.net (2600:1406:32::40)2026092802

Checks

  • ✓ Serial 2026092802 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 30d, negative TTL 1h.
  • i
    Hidden master
    The primary nameserver ns1.sq.com.sg is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact networkoperations@singaporeair.com.sg #25
    The SOA RNAME networkoperations.singaporeair.com.sg means networkoperations@singaporeair.com.sg.
  • ✓ Date-based serial #26
    The serial 2026092802 follows the YYYYMMDDnn convention (2026-09-28).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
24 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
58041ECDSAP256SHA256 (13)SHA256 40D8C2770CB2AE4E…yes

DNSKEY in the zone

Key tagRoleAlgorithm
58041KSK (257)ECDSAP256SHA256 (13)
820ZSK (256)ECDSAP256SHA256 (13)
54504ZSK (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 58041 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 73h0m0s and created on demand; the current one was made at 2026-10-21 21:45 UTC and expires at 2026-10-24 22:45 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

warn

15 records at the apex

Found

Read from
193.108.91.247:53
TypeValueTTL
SOAns1.sq.com.sg. networkoperations.singaporeair.com.sg. 2026092802 10800 3600 2592000 3600900
NSa18-66.akam.net.900
NSa1-247.akam.net.900
NSa13-65.akam.net.900
NSa7-64.akam.net.900
NSa12-64.akam.net.900
NSa20-67.akam.net.900
A2.18.64.720
A2.18.64.3420
MX0 singaporeair-com.mail.protection.outlook.com.300
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com -all"3600
TXT"2155-88D9-EB88-FF14-B8BA-0E27-73EA-9EAE"3600
TXT"globalsign-domain-verification=52784278967930EEB8FF573589B498AC"3600
TXT"_hpjlh7dhk9h86x15g9fo4wp0klv406z"3600
TXT"google-site-verification=mFazZGW5VDkZBVTILxaaMSN8x2CFDF5H0LtMDA-rzFo"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 15m; 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.
  • 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