teamfortress.com

Checked 22 October 2026, 10:55 UTC · via 8.8.8.8
!Passed with warnings
24 passed 4 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-09-11

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
11 September 2004
Last changed
2 September 2024
Expires
11 September 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
a1-164.akam.net, a11-67.akam.net, a24-64.akam.net, a26-65.akam.net, a8-66.akam.net, a9-67.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 2028-09-11 #3
    The registration is valid until 2028-09-11 (690 days).
  • ✓ Transfer locked #4
    Registry status: client delete 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

warn

a1-164.akam.net, a11-67.akam.net, a24-64.akam.net, a26-65.akam.net, a8-66.akam.net, a9-67.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-164.akam.net, a11-67.akam.net, a24-64.akam.net, a26-65.akam.net, a8-66.akam.net, a9-67.akam.net
NS in the zone
a1-194.akam.net, a2-64.akam.net, a22-67.akam.net, a24-64.akam.net, a7-66.akam.net, a9-66.akam.net
NameserverAddressesNetwork (AS)Glue
a1-164.akam.net (parent only)193.108.91.164 2600:1401:2::a4AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a1-194.akam.net (zone only)193.108.91.194 2600:1401:2::c2AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-67.akam.net (parent only)84.53.139.67 2600:1480:1::43AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-64.akam.net (zone only)95.100.174.64 2600:1480:7000::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a22-67.akam.net (zone only)23.211.61.67 2600:1480:7800::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a24-64.akam.net2.16.130.64 2600:1480:9800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a26-65.akam.net (parent only)23.74.25.65 2600:1480:b800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-66.akam.net (zone only)23.61.199.66 2600:1406:32::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a8-66.akam.net (parent only)2.16.40.66 2600:1403:a::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a9-66.akam.net (zone only)184.85.248.66 2a02:26f0:117::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a9-67.akam.net (parent only)184.85.248.67 2a02:26f0:117::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-164.akam.net, a11-67.akam.net, a24-64.akam.net, a26-65.akam.net, a8-66.akam.net, a9-67.akam.net.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: a1-164.akam.net, a11-67.akam.net, a26-65.akam.net, a8-66.akam.net, a9-67.akam.net; only in the zone: a1-194.akam.net, a2-64.akam.net, a22-67.akam.net, a7-66.akam.net, a9-66.akam.net. a1-164.akam.net, a1-194.akam.net, a11-67.akam.net, a2-64.akam.net, a22-67.akam.net, a24-64.akam.net, a26-65.akam.net, a7-66.akam.net, a8-66.akam.net, a9-66.akam.net, a9-67.akam.net report NS a1-194.akam.net a2-64.akam.net a22-67.akam.net a24-64.akam.net a7-66.akam.net a9-66.akam.net.
    #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 9 IPv4 /24s and 9 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 21 addresses.
  • 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

22 of 22 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-164.akam.net 193.108.91.164NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a1-164.akam.net 2600:1401:2::a4NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a1-194.akam.net 193.108.91.194NOERROR, 3 ms, authoritativenoyes / yesrefused41824.11
a1-194.akam.net 2600:1401:2::c2NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a11-67.akam.net 84.53.139.67NOERROR, 3 ms, authoritativenoyes / yesrefused41824.4
a11-67.akam.net 2600:1480:1::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a2-64.akam.net 95.100.174.64NOERROR, 5 ms, authoritativenoyes / yesrefused48878.32
a2-64.akam.net 2600:1480:7000::40NOERROR, 5 ms, authoritativenoyes / yesrefused48878.26
a22-67.akam.net 23.211.61.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a22-67.akam.net 2600:1480:7800::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a24-64.akam.net 2.16.130.64NOERROR, 3 ms, authoritativenoyes / yesrefused48878.33
a24-64.akam.net 2600:1480:9800::40NOERROR, 5 ms, authoritativenoyes / yesrefused48878.30
a26-65.akam.net 23.74.25.65NOERROR, 3 ms, authoritativenoyes / yesrefused48878.31
a26-65.akam.net 2600:1480:b800::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a7-66.akam.net 23.61.199.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.7
a7-66.akam.net 2600:1406:32::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.10
a8-66.akam.net 2.16.40.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a8-66.akam.net 2600:1403:a::42NOERROR, 5 ms, authoritativenoyes / yesrefused48878.27
a9-66.akam.net 184.85.248.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.5
a9-66.akam.net 2a02:26f0:117::42NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a9-67.akam.net 184.85.248.67NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a9-67.akam.net 2a02:26f0:117::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5

Checks

  • ✓ All respond #14
    All 22 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: a1-164.akam.net: "41824.6"; a1-164.akam.net: "41824.11"; a1-194.akam.net: "41824.11"; a1-194.akam.net: "41824.5"; a11-67.akam.net: "41824.4"; a11-67.akam.net: "41824.7"; a2-64.akam.net: "48878.32"; a2-64.akam.net: "48878.26"; a22-67.akam.net: "48878.30"; a22-67.akam.net: "48878.31"; a24-64.akam.net: "48878.33"; a24-64.akam.net: "48878.30"; a26-65.akam.net: "48878.31"; a26-65.akam.net: "48878.33"; a7-66.akam.net: "41824.7"; a7-66.akam.net: "41824.10"; a8-66.akam.net: "48878.32"; a8-66.akam.net: "48878.27"; a9-66.akam.net: "41824.5"; a9-66.akam.net: "41824.6"; a9-67.akam.net: "41824.9"; a9-67.akam.net: "41824.5". 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

info

serial 2025071101 · primary ns1.valvesoftware.com

Found

Primary (MNAME)
ns1.valvesoftware.com
Contact (RNAME)
admin.valvesoftware.com
Serial
2025071101
Refresh / retry
3600 s / 900 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
a1-164.akam.net (193.108.91.164)2025071101
a1-164.akam.net (2600:1401:2::a4)2025071101
a1-194.akam.net (193.108.91.194)2025071101
a1-194.akam.net (2600:1401:2::c2)2025071101
a11-67.akam.net (84.53.139.67)2025071101
a11-67.akam.net (2600:1480:1::43)2025071101
a2-64.akam.net (95.100.174.64)2025071101
a2-64.akam.net (2600:1480:7000::40)2025071101
a22-67.akam.net (23.211.61.67)2025071101
a22-67.akam.net (2600:1480:7800::43)2025071101
a24-64.akam.net (2.16.130.64)2025071101
a24-64.akam.net (2600:1480:9800::40)2025071101
a26-65.akam.net (23.74.25.65)2025071101
a26-65.akam.net (2600:1480:b800::41)2025071101
a7-66.akam.net (23.61.199.66)2025071101
a7-66.akam.net (2600:1406:32::42)2025071101
a8-66.akam.net (2.16.40.66)2025071101
a8-66.akam.net (2600:1403:a::42)2025071101
a9-66.akam.net (184.85.248.66)2025071101
a9-66.akam.net (2a02:26f0:117::42)2025071101
a9-67.akam.net (184.85.248.67)2025071101
a9-67.akam.net (2a02:26f0:117::43)2025071101

Checks

  • ✓ Serial 2025071101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 15m, expire 28d, negative TTL 1h.
  • i
    Hidden master
    The primary nameserver ns1.valvesoftware.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 admin@valvesoftware.com #25
    The SOA RNAME admin.valvesoftware.com means admin@valvesoftware.com.
  • ✓ Date-based serial #26
    The serial 2025071101 follows the YYYYMMDDnn convention (2025-07-11).

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

14 records at the apex

Found

Read from
193.108.91.164:53
TypeValueTTL
SOAns1.valvesoftware.com. admin.valvesoftware.com. 2025071101 3600 900 2419200 360010800
NSa2-64.akam.net.172800
NSa22-67.akam.net.172800
NSa24-64.akam.net.172800
NSa1-194.akam.net.172800
NSa9-66.akam.net.172800
NSa7-66.akam.net.172800
A104.86.145.5020
MX10 us-smtp-inbound-1.mimecast.com.10800
MX10 us-smtp-inbound-2.mimecast.com.10800
TXT"v=spf1 mx include:_netblocks.mimecast.com -all"10800
CAA0 issue "letsencrypt.org"10800
CAA0 iodef "mailto:ssl-abuse@valvesoftware.com"10800
CAA0 issue "digicert.com"10800

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change.
    #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: letsencrypt.org, digicert.com.