symantec.com

.com generic · CSC Corporate Domains, Inc. · expires 2027-11-23

Found

TLD

.com (generic)

ICANN policies apply

yes

Registrar

CSC Corporate Domains, Inc.

Registered

24 November 1992

Last changed

19 October 2026

Expires

23 November 2027

Status

client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited

Registry nameservers

edns161.ultradns.biz, edns161.ultradns.com, edns161.ultradns.net, edns161.ultradns.org

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 2027-11-23 #3

  The registration is valid until 2027-11-23 (396 days).
• ✓ Transfer locked #4

  Registry status: client transfer 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.

edns161.ultradns.biz, edns161.ultradns.com, edns161.ultradns.net, edns161.ultradns.org

Found

Parent zone

com

Delegation from

a.gtld-servers.net (192.5.6.30)

NS at the parent

edns161.ultradns.biz, edns161.ultradns.com, edns161.ultradns.net, edns161.ultradns.org

NS in the zone

edns161.ultradns.biz, edns161.ultradns.com, edns161.ultradns.net, edns161.ultradns.org

Checks

• ✓ 4 nameservers #6

  Delegated to edns161.ultradns.biz, edns161.ultradns.com, edns161.ultradns.net, edns161.ultradns.org.
• ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS12008 (VERCARA - Vercara, LLC, US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

  #11
• ✓ Nameserver names under 4 TLDs #12

  Nameserver names use the TLDs .biz, .com, .net, .org.
• ✓ All reachable over IPv6 #13

  Every nameserver has an IPv6 address.

8 of 8 addresses answer authoritatively

Found

Checks

• ✓ All respond #14

  All 8 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: edns161.ultradns.biz: "UltraDNS Nameserver"; edns161.ultradns.com: "UltraDNS Nameserver"; edns161.ultradns.net: "UltraDNS Nameserver"; edns161.ultradns.org: "UltraDNS Nameserver".

  #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 2021022673 · primary lvn-exdns-1.broadcom.net

Found

Primary (MNAME)

lvn-exdns-1.broadcom.net

Contact (RNAME)

domains\.admin.broadcom.com

Serial

2021022673

Refresh / retry

10800 s / 3600 s

Expire

2592000 s

Negative TTL

300 s

Serial per nameserver

Checks

• ✓ Serial 2021022673 everywhere #22

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

  SOA refresh 3h, retry 1h, expire 30d, negative TTL 5m.
• i

  Hidden master

  The primary nameserver lvn-exdns-1.broadcom.net 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 domains.admin@broadcom.com #25

  The SOA RNAME domains\.admin.broadcom.com means domains.admin@broadcom.com.
• ✓ Date-based serial #26

  The serial 2021022673 follows the YYYYMMDDnn convention (2021-02-26).