netcraft.com

Checked 22 October 2026, 10:01 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2034-10-17

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
18 October 1994
Last changed
6 January 2025
Expires
17 October 2034
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
authns1.netcraft.com, authns2.netcraft.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 2034-10-17 #3
    The registration is valid until 2034-10-17 (2916 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

authns1.netcraft.com, authns2.netcraft.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
authns1.netcraft.com, authns2.netcraft.com
NS in the zone
authns1.netcraft.com, authns2.netcraft.com
NameserverAddressesNetwork (AS)Glue
authns1.netcraft.com91.236.66.106 2a05:d018:a5f:9100:25e2:7f7e:21:8f2eAS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US2a05:d018:a5f:9100:25e2:7f7e:21:8f2e 91.236.66.106
authns2.netcraft.com91.236.64.5 2a10:a700:1::5AS212329 NETCRAFT - Netcraft Ltd, GB AS212329 NETCRAFT - Netcraft Ltd, GB2a10:a700:1::5 91.236.64.5

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: authns1.netcraft.com, authns2.netcraft.com.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: authns1.netcraft.com, authns2.netcraft.com.
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 2 addresses; AS212329 (NETCRAFT - Netcraft Ltd, GB): 2 addresses.
  • 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

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
authns1.netcraft.com 91.236.66.106NOERROR, 23 ms, authoritativenoyes / yesrefused-
authns1.netcraft.com 2a05:d018:a5f:9100:25e2:7f7e:21:8f2eNOERROR, 23 ms, authoritativenoyes / yesrefused-
authns2.netcraft.com 91.236.64.5NOERROR, 28 ms, authoritativenoyes / yesrefused-
authns2.netcraft.com 2a10:a700:1::5NOERROR, 28 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 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

pass

serial 2026100100 · primary authns1.netcraft.com

Found

Primary (MNAME)
authns1.netcraft.com
Contact (RNAME)
hostmaster.netcraft.com
Serial
2026100100
Refresh / retry
14400 s / 1800 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
authns1.netcraft.com (91.236.66.106)2026100100
authns1.netcraft.com (2a05:d018:a5f:9100:25e2:7f7e:21:8f2e)2026100100
authns2.netcraft.com (91.236.64.5)2026100100
authns2.netcraft.com (2a10:a700:1::5)2026100100

Checks

  • ✓ Serial 2026100100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 30m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver authns1.netcraft.com is one of the listed nameservers.
  • ✓ Contact hostmaster@netcraft.com #25
    The SOA RNAME hostmaster.netcraft.com means hostmaster@netcraft.com.
  • ✓ Date-based serial #26
    The serial 2026100100 follows the YYYYMMDDnn convention (2026-10-01).

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

pass

45 records at the apex

Found

Read from
91.236.66.106:53
TypeValueTTL
SOAauthns1.netcraft.com. hostmaster.netcraft.com. 2026100100 14400 1800 604800 3600900
NSauthns2.netcraft.com.900
NSauthns1.netcraft.com.900
A104.20.35.98900
A188.114.96.2900
A172.66.147.145900
MX10 mail-1c.netcraft.com.300
MX5 mail-1a.netcraft.com.300
TXT"mongodb-site-verification=vm70hiALv18h4WOLhEDIsB6i1PLZX3fb"900
TXT"facebook-domain-verification=q84ext6g441elo2m1niy7d42k2t6qi"900
TXT"jetbrains-domain-verification=9jyzvn1i2e9ngqfogqbjw2xrd"900
TXT"adobe-idp-site-verification=09537a9e1085d784a149eb5042eef1bc9a8de3f85b46e68b3ef0037985dfc1c5"900
TXT"rippling-domain-verification=2c9fe900dbf9a71b"900
TXT"incident.netcraft.com=ca3-375613219ce04e68b6648d466cc99e37"900
TXT"netcraft.com=ca3-f80c908d0460420ea415db4073b0a29c"900
TXT"openai-domain-verification=dv-21e2PYdryYmRKr3bz0bLg3Br"900
TXT"anthropic-domain-verification-ww1pen=XMLpZpclV7LHkzMQpMCpYzCGk"900
TXT"v=spf1 ip4:194.72.238.0/24 ip4:91.236.66.192/29 ip4:52.31.138.216/32 ip4:52.19.95.184/32 ip4:52.48.1.81/32 ip6:2a00:2381:ebdb::/64 mx include:_spf.google.com include:spf.protection.outlook.com include:25394294.spf06.hubspotemail.net -all"900
TXT"zapier-domain-verification-challenge=6a7e064f-fac6-434c-a402-8cd4a7377505"900
TXT"MS=ms49835954"900
TXT"1password-site-verification=ZA553LO4H5D7DLOSEEVMANPY7U"900
TXT"cursor-domain-verification-twtv0p=x1nt7nUHdw6GCZszJez9K67Df"900
TXT"docusign=134e8b44-f6f4-408b-b0f0-9b5fccdb834a"900
TXT"ahrefs-site-verification_4f46fda8c441afe71a611fd95e5cb02672d3d760130de776183c4c7fdfa06621"900
TXT"google-site-verification=i6ZARmNgvcdv1LL8W2r_MEw2noUtATGC60x_3KFzLb4"900
TXT"asv=e6e08661740e2c784499e3682a0f303c"900
TXT"_c179maz08s1larmwhgbofe8v2cpuavc"900
TXT"_ikulxonh34vwv8x42zkr5mxfbspt72v"900
TXT"2H34Q8VH72QhUtCduv7OEbsvE1LLryylb1E9aZsVh4eaB37nLqpLM5B3UnMw86cOHU4n1RxuB2eCTfnoOCmODQ=="900
TXT"atlassian-sending-domain-verification=d7bd07f1-665f-470e-93c1-bf27e5898d17"900
TXT"cloudflare_dashboard_sso=b27c6f6f85f06174ca5bc1a3f9558834"900
TXT"brevo-code:9bcd75774fb55b22baf7c18bb249a879"900
TXT"amazon-business-verification=1c9e5854fc7634f56fc4cec84cdde8b8beb74c609e88a9d75bfe2c2c79ab816f"900
TXT"anthropic-domain-verification-9cp84d=k4GUIpciFYaEwKsGL7RqsTQVO"900
TXT"cloudflare-verify.netcraft.com=342358972-2078293"900
TXT"atlassian-domain-verification=URvw4QypMibuOCaPklcKUHFwYVkgdVIPaKAiaD2H3bgKgmFYXuOTlQmkH9sBaSfa"900
CAA0 issuewild "amazon.com"900
CAA0 issue "amazon.com"900
CAA0 issue "comodoca.com"900
CAA0 issue "pki.goog"900
CAA0 issue "digicert.com; cansignhttpexchanges=yes"900
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"900
CAA0 issue "letsencrypt.org"900
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"900
CAA0 issue "globalsign.com"900

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, MX 5m, NS 15m. The NS TTL at the parent is 2d and in the zone 15m; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, comodoca.com, pki.goog, digicert.com, letsencrypt.org, globalsign.com.