twoplustwo.com

Checked 22 October 2026, 11:14 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Squarespace Domains II LLC · expires 2027-06-07

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Squarespace Domains II LLC
Registered
8 June 1997
Last changed
23 May 2026
Expires
7 June 2027
Status
client delete prohibited, client transfer prohibited
Registry nameservers
colette.ns.cloudflare.com, wells.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 2027-06-07 #3
    The registration is valid until 2027-06-07 (227 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

colette.ns.cloudflare.com, wells.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
colette.ns.cloudflare.com, wells.ns.cloudflare.com
NS in the zone
colette.ns.cloudflare.com, wells.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
colette.ns.cloudflare.com162.159.38.28 108.162.194.28 172.64.34.28 2a06:98c1:50::ac40:221c 2803:f800:50::6ca2:c21c 2606:4700:50::a29f:261cAS13335 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., US108.162.194.28 162.159.38.28 172.64.34.28 2606:4700:50::a29f:261c 2803:f800:50::6ca2:c21c 2a06:98c1:50::ac40:221c
wells.ns.cloudflare.com108.162.195.125 162.159.44.125 172.64.35.125 2a06:98c1:50::ac40:237d 2803:f800:50::6ca2:c37d 2606:4700:58::a29f:2c7dAS13335 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., US108.162.195.125 162.159.44.125 172.64.35.125 2606:4700:58::a29f:2c7d 2803:f800:50::6ca2:c37d 2a06:98c1:50::ac40:237d

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: colette.ns.cloudflare.com, wells.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
colette.ns.cloudflare.com 162.159.38.28NOERROR, 33 ms, authoritativenoyes / yesrefused2026.10.2
colette.ns.cloudflare.com 108.162.194.28NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
colette.ns.cloudflare.com 172.64.34.28NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
colette.ns.cloudflare.com 2a06:98c1:50::ac40:221cNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
colette.ns.cloudflare.com 2803:f800:50::6ca2:c21cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
colette.ns.cloudflare.com 2606:4700:50::a29f:261cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
wells.ns.cloudflare.com 108.162.195.125NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
wells.ns.cloudflare.com 162.159.44.125NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
wells.ns.cloudflare.com 172.64.35.125NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
wells.ns.cloudflare.com 2a06:98c1:50::ac40:237dNOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
wells.ns.cloudflare.com 2803:f800:50::6ca2:c37dNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
wells.ns.cloudflare.com 2606:4700:58::a29f:2c7dNOERROR, 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: colette.ns.cloudflare.com: "2026.10.2"; wells.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 2415422242 · primary colette.ns.cloudflare.com

Found

Primary (MNAME)
colette.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2415422242
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
colette.ns.cloudflare.com (162.159.38.28)2415422242
colette.ns.cloudflare.com (108.162.194.28)2415422242
colette.ns.cloudflare.com (172.64.34.28)2415422242
colette.ns.cloudflare.com (2a06:98c1:50::ac40:221c)2415422242
colette.ns.cloudflare.com (2803:f800:50::6ca2:c21c)2415422242
colette.ns.cloudflare.com (2606:4700:50::a29f:261c)2415422242
wells.ns.cloudflare.com (108.162.195.125)2415422242
wells.ns.cloudflare.com (162.159.44.125)2415422242
wells.ns.cloudflare.com (172.64.35.125)2415422242
wells.ns.cloudflare.com (2a06:98c1:50::ac40:237d)2415422242
wells.ns.cloudflare.com (2803:f800:50::6ca2:c37d)2415422242
wells.ns.cloudflare.com (2606:4700:58::a29f:2c7d)2415422242

Checks

  • ✓ Serial 2415422242 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 colette.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 2415422242 is a Unix timestamp (2046-07-17 06:37 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

info

16 records at the apex

Found

Read from
162.159.38.28:53
TypeValueTTL
SOAcolette.ns.cloudflare.com. dns.cloudflare.com. 2415422242 10000 2400 604800 18001800
NScolette.ns.cloudflare.com.86400
NSwells.ns.cloudflare.com.86400
A104.26.7.213300
A104.26.6.213300
A172.67.69.64300
AAAA2606:4700:20::ac43:4540300
AAAA2606:4700:20::681a:7d5300
AAAA2606:4700:20::681a:6d5300
MX10 mx1.emailsrvr.com.300
MX20 mx2.emailsrvr.com.300
TXT"589q5fw0kwwk6h29px5cvwn86ybbspl5"300
TXT"8cqxhrzg6mpxcnlc3n4w666dzfgd3q83"300
TXT"google-site-verification=IRaQHcI0SDuU2IYYXjId52F4NzVjb2Lj9NI04zOz1rw"300
TXT"google-site-verification=at2JxzGrh6Uwiu_k_NQzeDmk_uGMISufgQRsHAUE9H0"300
TXT"v=spf1 ip4:162.242.203.144 include:emailsrvr.com -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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