yimg.com

.com generic · MarkMonitor Inc. · expires 2027-05-15

Found

TLD

.com (generic)

ICANN policies apply

yes

Registrar

MarkMonitor Inc.

Registered

14 May 1997

Last changed

13 April 2026

Expires

15 May 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 2027-05-15 #3

  The registration is valid until 2027-05-15 (204 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.

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

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.
• ✓ 5 autonomous systems #11

  The nameservers are spread over: AS10310 (YAHOO-1 - Yahoo Holdings Inc., US): 1 address; AS10880 (YAHOO-AN2 - Yahoo Holdings Inc., US): 3 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

9 of 9 addresses answer authoritatively

Found

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.

serial 2026101301 · primary hidden-master.yahoo.com

Found

Primary (MNAME)

hidden-master.yahoo.com

Contact (RNAME)

hostmaster.yahoo-inc.com

Serial

2026101301

Refresh / retry

3600 s / 900 s

Expire

604800 s

Negative TTL

600 s

Serial per nameserver

Checks

• ✓ Serial 2026101301 everywhere #22

  All nameservers serve the same version of the zone.
• ✓ Timers within recommendations #23

  SOA refresh 1h, retry 15m, expire 7d, negative TTL 10m.
• i

  Hidden master

  The primary nameserver hidden-master.yahoo.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 hostmaster@yahoo-inc.com #25

  The SOA RNAME hostmaster.yahoo-inc.com means hostmaster@yahoo-inc.com.
• ✓ Date-based serial #26

  The serial 2026101301 follows the YYYYMMDDnn convention (2026-10-13).