informit.com

Checked 22 October 2026, 09:20 UTC · via 8.8.8.8
!Passed with warnings
23 passed 4 warnings 0 failed 4 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-01-28

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
28 January 1999
Last changed
24 January 2026
Expires
28 January 2027
Status
client transfer prohibited
Registry nameservers
ns1.pearson.com, ns2.pearson.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 2027-01-28 #3
    The registration is valid until 2027-01-28 (97 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

warn

ns1.pearson.com, ns2.pearson.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.pearson.com, ns2.pearson.com
NS in the zone
dns-amer-2.ptns.pearson.com, dns-apac-1.ptns.pearson.com, dns-emea-1.ptns.pearson.com
NameserverAddressesNetwork (AS)Glue
dns-amer-2.ptns.pearson.com (zone only)159.182.12.40AS11892 PEARSON-NA - NCS Pearson Inc., US-
dns-apac-1.ptns.pearson.com (zone only)159.182.67.40AS9823 PEARSON-APAC - Pearson Group, AU-
dns-emea-1.ptns.pearson.com (zone only)159.182.79.40AS29016 PEARSON-EMEA - Pearson Shared Services Ltd, GB-
ns1.pearson.com (parent only)168.146.112.10AS9823 PEARSON-APAC - Pearson Group, AU168.146.112.10
ns2.pearson.com (parent only)168.146.112.11AS9823 PEARSON-APAC - Pearson Group, AU168.146.112.11

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.pearson.com, ns2.pearson.com.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.pearson.com, ns2.pearson.com; only in the zone: dns-amer-2.ptns.pearson.com, dns-apac-1.ptns.pearson.com, dns-emea-1.ptns.pearson.com. dns-amer-2.ptns.pearson.com, dns-apac-1.ptns.pearson.com, dns-emea-1.ptns.pearson.com, ns1.pearson.com, ns2.pearson.com report NS dns-amer-2.ptns.pearson.com dns-apac-1.ptns.pearson.com dns-emea-1.ptns.pearson.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 4 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS11892 (PEARSON-NA - NCS Pearson Inc., US): 1 address; AS29016 (PEARSON-EMEA - Pearson Shared Services Ltd, GB): 1 address; AS9823 (PEARSON-APAC - Pearson Group, AU): 3 addresses.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns-amer-2.ptns.pearson.com 159.182.12.40NOERROR, 94 ms, authoritativenoyes / yesrefused-
dns-apac-1.ptns.pearson.com 159.182.67.40NOERROR, 271 ms, authoritativenoyes / yesrefused-
dns-emea-1.ptns.pearson.com 159.182.79.40NOERROR, 24 ms, authoritativenoyes / yesrefused-
ns1.pearson.com 168.146.112.10NOERROR, 244 ms, authoritativenoyes / yesrefused-
ns2.pearson.com 168.146.112.11NOERROR, 241 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 5 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 2010121354 · primary dns-amer-2.ptns.pearson.com

Found

Primary (MNAME)
dns-amer-2.ptns.pearson.com
Contact (RNAME)
gns-dnsoperations.pearson.com
Serial
2010121354
Refresh / retry
900 s / 900 s
Expire
2592000 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
dns-amer-2.ptns.pearson.com (159.182.12.40)2010121354
dns-apac-1.ptns.pearson.com (159.182.67.40)2010121354
dns-emea-1.ptns.pearson.com (159.182.79.40)2010121354
ns1.pearson.com (168.146.112.10)2010121354
ns2.pearson.com (168.146.112.11)2010121354

Checks

  • ✓ Serial 2010121354 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 15m is outside 20m–1d; retry 15m should be shorter than refresh 15m. Current values: refresh 15m, retry 15m, expire 30d, negative TTL 15m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns-amer-2.ptns.pearson.com is one of the listed nameservers.
  • ✓ Contact gns-dnsoperations@pearson.com #25
    The SOA RNAME gns-dnsoperations.pearson.com means gns-dnsoperations@pearson.com.
  • ✓ Date-based serial #26
    The serial 2010121354 follows the YYYYMMDDnn convention (2010-12-13).

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

info

9 records at the apex

Found

Read from
159.182.12.40:53
TypeValueTTL
SOAdns-amer-2.ptns.pearson.com. gns-dnsoperations.pearson.com. 2010121354 900 900 2592000 900900
NSdns-apac-1.ptns.pearson.com.900
NSdns-emea-1.ptns.pearson.com.900
NSdns-amer-2.ptns.pearson.com.900
A159.182.75.47900
MX10 informit-com.mail.protection.outlook.com.900
TXT"google-site-verification=AIyDZJCKtANUuH8DFxSIwoLAh2lqGH4FOiu9RVbSMJo"900
TXT"v=spf1 include:_spf.informit_com._d.easydmarc.pro ~all"900
TXT"MS=ms18659953"900

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, MX 15m, NS 15m. The NS TTL at the parent is 2d and in the zone 15m; resolvers may use either.
  • ✓ 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