synopsys.com

Checked 22 October 2026, 10:53 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2028-06-26

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
27 June 1989
Last changed
22 June 2026
Expires
26 June 2028
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
exdns1.synopsys.com, exdns2.synopsys.com, exdns3.synopsys.com, exdns4.synopsys.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 2028-06-26 #3
    The registration is valid until 2028-06-26 (612 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.

Delegation

warn

exdns1.synopsys.com, exdns2.synopsys.com, exdns3.synopsys.com, exdns4.synopsys.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
exdns1.synopsys.com, exdns2.synopsys.com, exdns3.synopsys.com, exdns4.synopsys.com
NS in the zone
exdns1.synopsys.com, exdns2.synopsys.com, exdns3.synopsys.com, exdns4.synopsys.com
NameserverAddressesNetwork (AS)Glue
exdns1.synopsys.com149.117.1.1AS7809 SYNOPSYS - Synopsys Inc., US149.117.1.1
exdns2.synopsys.com149.117.1.2AS7809 SYNOPSYS - Synopsys Inc., US149.117.1.2
exdns3.synopsys.com149.117.1.3AS7809 SYNOPSYS - Synopsys Inc., US149.117.1.3
exdns4.synopsys.com149.117.1.4AS7809 SYNOPSYS - Synopsys Inc., US149.117.1.4

Checks

  • ✓ 4 nameservers #6
    Delegated to exdns1.synopsys.com, exdns2.synopsys.com, exdns3.synopsys.com, exdns4.synopsys.com.
  • ✓ 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: exdns1.synopsys.com, exdns2.synopsys.com, exdns3.synopsys.com, exdns4.synopsys.com.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 149.117.1.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS7809 (SYNOPSYS - Synopsys Inc., US): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
exdns1.synopsys.com 149.117.1.1NOERROR, 20 ms, authoritativenoyes / yesrefused-
exdns2.synopsys.com 149.117.1.2NOERROR, 20 ms, authoritativenoyes / yesrefused-
exdns3.synopsys.com 149.117.1.3NOERROR, 20 ms, authoritativenoyes / yesrefused-
exdns4.synopsys.com 149.117.1.4NOERROR, 21 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

info

serial 15001 · primary badc-ipam-exdns1.synopsys.com

Found

Primary (MNAME)
badc-ipam-exdns1.synopsys.com
Contact (RNAME)
hmaster.synopsys.com
Serial
15001
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
exdns1.synopsys.com (149.117.1.1)15001
exdns2.synopsys.com (149.117.1.2)15001
exdns3.synopsys.com (149.117.1.3)15001
exdns4.synopsys.com (149.117.1.4)15001

Checks

  • ✓ Serial 15001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 5m.
  • i
    Hidden master
    The primary nameserver badc-ipam-exdns1.synopsys.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 hmaster@synopsys.com #25
    The SOA RNAME hmaster.synopsys.com means hmaster@synopsys.com.
  • ✓ Counter serial #26
    The serial 15001 is a plain counter.

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

info

37 records at the apex

Found

Read from
149.117.1.1:53
TypeValueTTL
SOAbadc-ipam-exdns1.synopsys.com. hmaster.synopsys.com. 15001 10800 3600 2419200 300300
NSexdns3.synopsys.com.300
NSexdns1.synopsys.com.300
NSexdns2.synopsys.com.300
NSexdns4.synopsys.com.300
A149.117.73.34300
MX10 mxa-00230701.gslb.pphosted.com.300
MX10 mxb-00230701.gslb.pphosted.com.300
TXT"asv=a27efce1e17159e20a3607d7dd59e3aa"1
TXT"google-site-verification=wVreJ96AXv6fa6UUAQSYzWtN1S6ZGQ8hJMbo17TkFGI"1
TXT"11ea5740-6a84-431a-9495-d1aec10f114a"1
TXT"successfactors-site-verification=OWFlZTEwNzM1YmI2NGQxMzMxMmNjNTI5NzU5NmJhNGU2ZTFkNTYwOWM5MmYwMmRhY2VhZTBjMWU3ZGI2NDBlYw=="1
TXT"MS=88865D956AA98BBEFA948D10F45FF79BA7A92ADB"1
TXT"postman-domain-verification=d11ad187c9cdda5f5da65d7a523d5540a94bb29943799d0f18ad70ed59d6d9c0cc12c1d44ea0867d8573b252fb9c311de5ad8d5e80fcd75b86cd654dafe17e07"1
TXT"monday-com-verification=tc8R0JJPc93ynzdvfunX3oPSK2ox11XtdAZo-Akbjrg"1
TXT"P2A_5084_6"1
TXT"docker-verification=bd2ba22a-6c18-405a-a1b0-68f946ab3715"1
TXT"ibmid=c0c14b32-10f8-430d-a816-a80daa67817e"1
TXT"mongodb-site-verification=bwGpGKNN4jvJFwEdKmq0YmEHk3T1AQqD"1
TXT"Box-domain-verification=9b172a44cd703e553007029f95ee420c9042cc1bd1d9e4a99d632aaa178e5a92"1
TXT"v=verifydomain" "MS=msB0D400"1
TXT"MS=ms40559454"1
TXT"docusign=9ce82f70-8ba8-45c5-87a2-7219a4c84a09"1
TXT"openai-domain-verification=dv-KYIvUbLJB890SpcjN9r2vEPC"1
TXT"00d3000000007mmeai"1
TXT"docusign=ca44d866-ec9f-4125-9c79-728e5727776d"1
TXT"anthropic-domain-verification-10hjz7=Sle6MnsLimbxNz450UDzmht3z"1
TXT"b593976b-c8ed-4682-89a6-98f2d83bffb4"1
TXT"jamf-site-verification=odGmIhRE-sw9gYrdDd0-WA"1
TXT"Google-site-verification=Ec3zZnY74WH1zikDXcm7kKtuPbqD0YUxDg79BvAKOuo"1
TXT"successfactors-site-verification=YzNkMDE1M2I1ZjZmMzY4ZmQ2NWEwMDBlOTZkY2ZlNmE3MjM4M2Y1NDRhNTZmN2FhODAzZGVkZTlhMjI2NWNjMw=="1
TXT"v=spf1 include:_spf.synopsys.com include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"1
TXT"KqF0xBhtcfu309yxE829ne3ZLyXZeaNpi2h7uRHEBBIZcutwGAusobf+S3eu7G5fzaAJPxfrD4yJG864RU1GJQ=="1
TXT"qH78HbzFm/WML+0z1ClPg6h/ALz5qTVq6SF7fSMxZG6TaNcPtFbA7TCbMmdBelywDqID5zH8ZSlP0nJtUVCbvA=="1
TXT"atlassian-domain-verification=GqyibgPiaXhOERsot4TRzihsTmsusxwuzsX5lOONRQCMVDaAa2gXQ4PoR/W8za/N"1
TXT"smartsheet-site-validation=JgHRDHUEUdnQLP0J67NliHUr5jgwaOik"1
TXT"mixpanel-domain-verify=2a654d80-9169-4745-b703-97f3a6953e12"1

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 2d and in the zone 5m; 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.
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35