oculus.com

Checked 22 October 2026, 10:05 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 warnings 0 failed 3 info

Registration

info

.com generic · RegistrarSafe, LLC · expires 2034-05-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
RegistrarSafe, LLC
Registered
9 May 1995
Last changed
28 May 2025
Expires
10 May 2034
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.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 2034-05-10 #3
    The registration is valid until 2034-05-10 (2756 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update 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

a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com
NS in the zone
a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com
NameserverAddressesNetwork (AS)Glue
a.ns.facebook.com129.134.30.12 2a03:2880:f0fc:c:face:b00c:0:35AS32934 FACEBOOK - Facebook, Inc., US AS32934 FACEBOOK - Facebook, Inc., US129.134.30.12 2a03:2880:f0fc:c:face:b00c:0:35
b.ns.facebook.com129.134.31.12 2a03:2880:f0fd:c:face:b00c:0:35AS32934 FACEBOOK - Facebook, Inc., US AS32934 FACEBOOK - Facebook, Inc., US129.134.31.12 2a03:2880:f0fd:c:face:b00c:0:35
c.ns.facebook.com185.89.218.12 2a03:2880:f1fc:c:face:b00c:0:35AS32934 FACEBOOK - Facebook, Inc., US AS32934 FACEBOOK - Facebook, Inc., US185.89.218.12 2a03:2880:f1fc:c:face:b00c:0:35
d.ns.facebook.com185.89.219.12 2a03:2880:f1fd:c:face:b00c:0:35AS32934 FACEBOOK - Facebook, Inc., US AS32934 FACEBOOK - Facebook, Inc., US185.89.219.12 2a03:2880:f1fd:c:face:b00c:0:35

Checks

  • ✓ 4 nameservers #6
    Delegated to a.ns.facebook.com, b.ns.facebook.com, c.ns.facebook.com, d.ns.facebook.com.
  • ✓ 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 (AS32934 (FACEBOOK - Facebook, 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
  • 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

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a.ns.facebook.com 129.134.30.12NOERROR, 4 ms, authoritativenoyes / yesrefused-
a.ns.facebook.com 2a03:2880:f0fc:c:face:b00c:0:35NOERROR, 4 ms, authoritativenoyes / yesrefused-
b.ns.facebook.com 129.134.31.12NOERROR, 10 ms, authoritativenoyes / yesrefused-
b.ns.facebook.com 2a03:2880:f0fd:c:face:b00c:0:35NOERROR, 12 ms, authoritativenoyes / yesrefused-
c.ns.facebook.com 185.89.218.12NOERROR, 12 ms, authoritativenoyes / yesrefused-
c.ns.facebook.com 2a03:2880:f1fc:c:face:b00c:0:35NOERROR, 20 ms, authoritativenoyes / yesrefused-
d.ns.facebook.com 185.89.219.12NOERROR, 36 ms, authoritativenoyes / yesrefused-
d.ns.facebook.com 2a03:2880:f1fd:c:face:b00c:0:35NOERROR, 36 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 4207849484 · primary a.ns.facebook.com

Found

Primary (MNAME)
a.ns.facebook.com
Contact (RNAME)
dns.facebook.com
Serial
4207849484
Refresh / retry
7200 s / 1800 s
Expire
604800 s
Negative TTL
120 s

Serial per nameserver

NameserverSerial
a.ns.facebook.com (129.134.30.12)4207849484
a.ns.facebook.com (2a03:2880:f0fc:c:face:b00c:0:35)4207849484
b.ns.facebook.com (129.134.31.12)4207849484
b.ns.facebook.com (2a03:2880:f0fd:c:face:b00c:0:35)4207849484
c.ns.facebook.com (185.89.218.12)4207849484
c.ns.facebook.com (2a03:2880:f1fc:c:face:b00c:0:35)4207849484
d.ns.facebook.com (185.89.219.12)4207849484
d.ns.facebook.com (2a03:2880:f1fd:c:face:b00c:0:35)4207849484

Checks

  • ✓ Serial 4207849484 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 30m, expire 7d, negative TTL 2m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver a.ns.facebook.com is one of the listed nameservers.
  • ✓ Contact dns@facebook.com #25
    The SOA RNAME dns.facebook.com means dns@facebook.com.
  • ✓ Timestamp serial #26
    The serial 4207849484 is a Unix timestamp (2103-05-05 23:04 UTC).

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

warn

22 records at the apex

Found

Read from
129.134.30.12:53
TypeValueTTL
SOAa.ns.facebook.com. dns.facebook.com. 4207849484 7200 1800 604800 120120
NSb.ns.facebook.com.1800
NSc.ns.facebook.com.1800
NSd.ns.facebook.com.1800
NSa.ns.facebook.com.1800
A57.144.245.14160
AAAA2a03:2880:f37a:18d:face:b00c:0:32c260
MX10 mxa-00082601.gslb.pphosted.com.7200
MX20 mx0b-00082601.pphosted.com.7200
MX20 mx0a-00082601.pphosted.com.7200
MX10 mxb-00082601.gslb.pphosted.com.7200
TXT"adobe-idp-site-verification=6589f998-6437-4ab2-99b1-02d67ece0131"300
TXT"atlassian-domain-verification=I7HLjLnlhJiDT58wzrru2Pd/2cRWa3AKlgCjDPOO43GMP7H0QuafH6eBts3D1GaP"3600
TXT"7459f833d3664655b852ad410a354900"900
TXT"r7Wv17rB-rte1DermXCyHrnyU10ihYLkZCuM6xNT3NQ"3600
TXT"v=spf1 include:_spf.google.com include:spf-00082601.pphosted.com include:spf.protection.outlook.com include:mail.zendesk.com in" "clude:app-spf.arenasolutions.com include:_spf.facebook.com include:servers.mcsv.net include:spf.mandrillapp.com include:mktomai" "l.com ip4:163.114.130.16 ip6:2620:10d:c091:400::8:1 ip4:163.114.132.120 ip6:2620:10d:c090:450::120 ip4:163.114.134.16 ip6:2620:" "10d:c09b:400::8:1 ip4:163.114.135.16 ip6:2620:10d:c09c:400::8:1 -all"7200
TXT"google-site-verification=WqjG2jhIhBeSE7gfCqR7HsF3OhUVXdQPHfSSmkkTDL0"300
TXT"lucid-verification=YGC9NhgwXT2YQzyqYYoG"3600
TXT"cisco-ci-domain-verification=2643cd2482dca75881a12f388cd7c9d25493860d0c5dff7db0ba992a7a32941c"3600
TXT"google-site-verification=J8rIciAaK7BrunIRBbAFfsbtkPQDpF1m2hcm2vKBolM"300
TXT"slack-domain-verification=SkRZ7nGzBxrWgutzSoy3vTqkQSMRagsPit96Bxf1"3600
CAA0 issue "digicert.com; account=271b0beda0771d006aa3a6c11b05187d456d6c239b46cb5241196095b09c92af"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 30m; 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: digicert.com.