alltheweb.com

Checked 22 October 2026, 07:43 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-09-25

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
26 September 1998
Last changed
24 August 2026
Expires
25 September 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.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 2027-09-25 #3
    The registration is valid until 2027-09-25 (337 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

ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com
NS in the zone
ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com
NameserverAddressesNetwork (AS)Glue
ns1.yahoo.com68.180.131.16 2001:4998:1b0::7961:686f:6f21AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US2001:4998:1b0::7961:686f:6f21 68.180.131.16
ns2.yahoo.com68.142.255.16 2001:4998:1c0::7961:686f:6f21AS7280 YAHOO-FC - Yahoo Holdings Inc., US AS7280 YAHOO-FC - Yahoo Holdings Inc., US2001:4998:1c0::7961:686f:6f21 68.142.255.16
ns3.yahoo.com27.123.42.42 2406:8600:f03f:1f8::1003AS23879 YAHOO-INY - INY Edge site, US AS23879 YAHOO-INY - INY Edge site, US2406:8600:f03f:1f8::1003 27.123.42.42
ns4.yahoo.com98.138.11.157AS36646 YAHOO-NE1 - Yahoo Holdings Inc., US98.138.11.157
ns5.yahoo.com202.165.97.53 2406:2000:1d0::7961:686f:6f21AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US202.165.97.53 2406:2000:1d0::7961:686f:6f21

Checks

  • ✓ 5 nameservers #6
    Delegated to ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.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 5 IPv4 /24s and 4 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS10880 (YAHOO-AN2 - Yahoo Holdings Inc., US): 4 addresses; AS23879 (YAHOO-INY - INY Edge site, US): 2 addresses; AS36646 (YAHOO-NE1 - Yahoo Holdings Inc., US): 1 address; AS7280 (YAHOO-FC - Yahoo Holdings Inc., US): 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns4.yahoo.com.
    #13

Nameservers

info

9 of 9 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.yahoo.com 68.180.131.16NOERROR, 19 ms, authoritativenoyes / yesrefusedYahoo
ns1.yahoo.com 2001:4998:1b0::7961:686f:6f21NOERROR, 15 ms, authoritativenoyes / yesrefusedYahoo
ns2.yahoo.com 68.142.255.16NOERROR, 3 ms, authoritativenoyes / yesrefusedYahoo
ns2.yahoo.com 2001:4998:1c0::7961:686f:6f21NOERROR, 4 ms, authoritativenoyes / yesrefusedYahoo
ns3.yahoo.com 27.123.42.42NOERROR, 214 ms, authoritativenoyes / yesrefusedYahoo
ns3.yahoo.com 2406:8600:f03f:1f8::1003NOERROR, 136 ms, authoritativenoyes / yesrefusedYahoo
ns4.yahoo.com 98.138.11.157NOERROR, 126 ms, authoritativenoyes / yesrefusedYahoo
ns5.yahoo.com 202.165.97.53NOERROR, 181 ms, authoritativenoyes / yesrefusedYahoo
ns5.yahoo.com 2406:2000:1d0::7961:686f:6f21NOERROR, 240 ms, authoritativenoyes / yesrefusedYahoo

Checks

  • ✓ All respond #14
    All 9 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: ns1.yahoo.com: "Yahoo"; ns2.yahoo.com: "Yahoo"; ns3.yahoo.com: "Yahoo"; ns4.yahoo.com: "Yahoo"; ns5.yahoo.com: "Yahoo".
    #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

warn

serial 2026080501 · primary hidden-master.yahoo.com.alltheweb.com

Found

Primary (MNAME)
hidden-master.yahoo.com.alltheweb.com
Contact (RNAME)
hostmaster.yahoo-inc.com.alltheweb.com
Serial
2026080501
Refresh / retry
900 s / 300 s
Expire
604800 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns1.yahoo.com (68.180.131.16)2026080501
ns1.yahoo.com (2001:4998:1b0::7961:686f:6f21)2026080501
ns2.yahoo.com (68.142.255.16)2026080501
ns2.yahoo.com (2001:4998:1c0::7961:686f:6f21)2026080501
ns3.yahoo.com (27.123.42.42)2026080501
ns3.yahoo.com (2406:8600:f03f:1f8::1003)2026080501
ns4.yahoo.com (98.138.11.157)2026080501
ns5.yahoo.com (202.165.97.53)2026080501
ns5.yahoo.com (2406:2000:1d0::7961:686f:6f21)2026080501

Checks

  • ✓ Serial 2026080501 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 15m is outside 20m–1d. Current values: refresh 15m, retry 5m, expire 7d, negative TTL 10m.
    #23
  • i
    Hidden master (not resolvable)
    The primary nameserver hidden-master.yahoo.com.alltheweb.com is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.
    #24
  • ✓ Contact hostmaster@yahoo-inc.com.alltheweb.com #25
    The SOA RNAME hostmaster.yahoo-inc.com.alltheweb.com means hostmaster@yahoo-inc.com.alltheweb.com.
  • ✓ Date-based serial #26
    The serial 2026080501 follows the YYYYMMDDnn convention (2026-08-05).

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

12 records at the apex

Found

Read from
68.180.131.16:53
TypeValueTTL
SOAhidden-master.yahoo.com.alltheweb.com. hostmaster.yahoo-inc.com.alltheweb.com. 2026080501 900 300 604800 6001800
NSns3.yahoo.com.1800
NSns4.yahoo.com.1800
NSns5.yahoo.com.1800
NSns2.yahoo.com.1800
NSns1.yahoo.com.1800
A13.248.158.71800
A76.223.84.1921800
MX10 midten.trd.overture.com.1800
CAA0 issue "globalsign.com"1800
CAA0 issue "digicert.com"1800
CAA0 iodef "mailto:security@yahooinc.com"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, MX 30m, NS 30m. The NS TTL at the parent is 2d and in the zone 30m; 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: globalsign.com, digicert.com.