wolframalpha.com

Checked 22 October 2026, 11:32 UTC · via 8.8.8.8
!Passed with warnings
21 passed 3 warnings 0 failed 7 info

Registration

info

.com generic · GoDaddy Corporate Domains, LLC · expires 2027-07-31

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy Corporate Domains, LLC
Registered
31 July 2008
Last changed
30 June 2026
Expires
31 July 2027
Status
client transfer prohibited
Registry nameservers
wri-dns2.wolfram.com, wri-dns3.wolfram.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 2027-07-31 #3
    The registration is valid until 2027-07-31 (282 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

wri-dns2.wolfram.com, wri-dns3.wolfram.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
wri-dns2.wolfram.com, wri-dns3.wolfram.com
NS in the zone
wri-dns2.wolfram.com, wri-dns3.wolfram.com
NameserverAddressesNetwork (AS)Glue
wri-dns2.wolfram.com140.177.10.23AS11106 WOLFRAM-AS - Wolfram Research, Inc., US140.177.10.23
wri-dns3.wolfram.com140.177.10.19AS11106 WOLFRAM-AS - Wolfram Research, Inc., US140.177.10.19

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: wri-dns2.wolfram.com, wri-dns3.wolfram.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 one network
    all IPv4 addresses are in 140.177.10.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS11106 (WOLFRAM-AS - Wolfram Research, Inc., US): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
wri-dns2.wolfram.com 140.177.10.23NOERROR, 108 ms, authoritativenoyes / yesrefusedNot a chance
wri-dns3.wolfram.com 140.177.10.19NOERROR, 108 ms, authoritativenoyes / yesrefusedNot a chance

Checks

  • ✓ All respond #14
    All 2 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: wri-dns2.wolfram.com: "Not a chance"; wri-dns3.wolfram.com: "Not a chance".
    #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 11576 · primary dns-master.wolfram.com

Found

Primary (MNAME)
dns-master.wolfram.com
Contact (RNAME)
postmaster.wolfram.com
Serial
11576
Refresh / retry
86400 s / 21600 s
Expire
604800 s
Negative TTL
50400 s

Serial per nameserver

NameserverSerial
wri-dns2.wolfram.com (140.177.10.23)11576
wri-dns3.wolfram.com (140.177.10.19)11576

Checks

  • ✓ Serial 11576 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 6h, expire 7d, negative TTL 14h.
  • i
    Hidden master
    The primary nameserver dns-master.wolfram.com 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 postmaster@wolfram.com #25
    The SOA RNAME postmaster.wolfram.com means postmaster@wolfram.com.
  • ✓ Counter serial #26
    The serial 11576 is a plain counter.

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

13 records at the apex

Found

Read from
140.177.10.23:53
TypeValueTTL
SOAdns-master.wolfram.com. postmaster.wolfram.com. 11576 86400 21600 604800 5040086400
NSwri-dns2.wolfram.com.86400
NSwri-dns3.wolfram.com.86400
A140.177.52.200300
MX10 mx1.wolfram.com.86400
MX10 mx2.wolfram.com.86400
TXT"v=spf1 mx ip4:140.177.61.16 ip4:140.177.61.19 ip4:140.177.7.254 ip4:140.177.33.36 a:relay.wolfram.com a:mailhub.wolfram.com -all"86400
TXT"k9iem9obist7l7s290s26nrukd"86400
TXT"tfqd17vfsiig2kj2i49buurfsb"86400
TXT"google-site-verification=zWO6G9Gg0bBvpd8_p0sf4wTENzBIVfhOquy69veLqwk"86400
TXT"MS=ms90289672"86400
TXT"55tah09n23c7g07ma4leb1enm9"86400
TXT"mhj5bulei1b53p2egivtc0d04r"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1d, 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