onlamp.com

Checked 22 October 2026, 10:10 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2026-12-15

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
15 December 2000
Last changed
18 November 2025
Expires
15 December 2026
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net, a3-67.akam.net, a4-64.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 2026-12-15 #3
    The registration is valid until 2026-12-15 (54 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client renew 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

a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net, a3-67.akam.net, a4-64.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net, a3-67.akam.net, a4-64.akam.net
NS in the zone
a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net, a3-67.akam.net, a4-64.akam.net
NameserverAddressesNetwork (AS)Glue
a1-225.akam.net193.108.91.225 2600:1401:2::e1AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a13-64.akam.net2.22.230.64 2600:1480:800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a16-65.akam.net23.211.132.65 2600:1406:1b::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a20-66.akam.net95.100.175.66 2a02:26f0:67::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a3-67.akam.net96.7.49.67 2600:1408:1c::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a4-64.akam.net72.246.46.64 2600:1480:9000::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net, a3-67.akam.net, a4-64.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
a1-225.akam.net 193.108.91.225NOERROR, 3 ms, authoritativenoyes / yesrefused41824.7
a1-225.akam.net 2600:1401:2::e1NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a13-64.akam.net 2.22.230.64NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a13-64.akam.net 2600:1480:800::40NOERROR, 5 ms, authoritativenoyes / yesrefused41824.6
a16-65.akam.net 23.211.132.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a16-65.akam.net 2600:1406:1b::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a20-66.akam.net 95.100.175.66NOERROR, 3 ms, authoritativenoyes / yesrefused48878.32
a20-66.akam.net 2a02:26f0:67::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a3-67.akam.net 96.7.49.67NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a3-67.akam.net 2600:1408:1c::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.8
a4-64.akam.net 72.246.46.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a4-64.akam.net 2600:1480:9000::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32

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: a1-225.akam.net: "41824.7"; a1-225.akam.net: "41824.11"; a13-64.akam.net: "41824.7"; a13-64.akam.net: "41824.6"; a16-65.akam.net: "48878.31"; a16-65.akam.net: "48878.27"; a20-66.akam.net: "48878.32"; a20-66.akam.net: "48878.30"; a3-67.akam.net: "41824.5"; a3-67.akam.net: "41824.8"; a4-64.akam.net: "48878.26"; a4-64.akam.net: "48878.32". 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

warn

serial 2021062203 · primary a1-225.akam.net

Found

Primary (MNAME)
a1-225.akam.net
Contact (RNAME)
nic-tc.oreilly.com
Serial
2021062203
Refresh / retry
600 s / 1800 s
Expire
5184000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
a1-225.akam.net (193.108.91.225)2021062203
a1-225.akam.net (2600:1401:2::e1)2021062203
a13-64.akam.net (2.22.230.64)2021062203
a13-64.akam.net (2600:1480:800::40)2021062203
a16-65.akam.net (23.211.132.65)2021062203
a16-65.akam.net (2600:1406:1b::41)2021062203
a20-66.akam.net (95.100.175.66)2021062203
a20-66.akam.net (2a02:26f0:67::42)2021062203
a3-67.akam.net (96.7.49.67)2021062203
a3-67.akam.net (2600:1408:1c::43)2021062203
a4-64.akam.net (72.246.46.64)2021062203
a4-64.akam.net (2600:1480:9000::40)2021062203

Checks

  • ✓ Serial 2021062203 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 10m is outside 20m–1d; retry 30m should be shorter than refresh 10m. Current values: refresh 10m, retry 30m, expire 60d, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-225.akam.net is one of the listed nameservers.
  • ✓ Contact nic-tc@oreilly.com #25
    The SOA RNAME nic-tc.oreilly.com means nic-tc@oreilly.com.
  • ✓ Date-based serial #26
    The serial 2021062203 follows the YYYYMMDDnn convention (2021-06-22).

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

8 records at the apex

Found

Read from
193.108.91.225:53
TypeValueTTL
SOAa1-225.akam.net. nic-tc.oreilly.com. 2021062203 600 1800 5184000 36003600
NSa13-64.akam.net.3600
NSa3-67.akam.net.3600
NSa20-66.akam.net.3600
NSa4-64.akam.net.3600
NSa16-65.akam.net.3600
NSa1-225.akam.net.3600
A34.169.83.1673600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; 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