xylem.com

Checked 22 October 2026, 11:36 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 0 failed 6 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-08-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
29 December 1999
Last changed
1 August 2026
Expires
5 August 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns3.flygt.com, ns4.flygt.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 2027-08-05 #3
    The registration is valid until 2027-08-05 (287 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

ns3.flygt.com, ns4.flygt.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns3.flygt.com, ns4.flygt.com
NS in the zone
ns3.flygt.com, ns4.flygt.com
NameserverAddressesNetwork (AS)Glue
ns3.flygt.com199.253.108.247AS60269 XYLEMINC-AS - XYLEMINC-AS, SE199.253.108.247
ns4.flygt.com199.253.98.250AS60269 XYLEMINC-AS - XYLEMINC-AS, SE199.253.98.250

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns3.flygt.com, ns4.flygt.com.
    #6
  • ✓ 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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS60269 (XYLEMINC-AS - XYLEMINC-AS, SE): 2 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

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.flygt.com 199.253.108.247NOERROR, 91 ms, authoritativenoyes / yesrefused-
ns4.flygt.com 199.253.98.250NOERROR, 52 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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 1701 · primary ussgv1ib03.flygt.com

Found

Primary (MNAME)
ussgv1ib03.flygt.com
Contact (RNAME)
isglobalnetwork.xyleminc.com
Serial
1701
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns3.flygt.com (199.253.108.247)1701
ns4.flygt.com (199.253.98.250)1701

Checks

  • ✓ Serial 1701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 15m.
  • i
    Hidden master
    The primary nameserver ussgv1ib03.flygt.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 isglobalnetwork@xyleminc.com #25
    The SOA RNAME isglobalnetwork.xyleminc.com means isglobalnetwork@xyleminc.com.
  • ✓ Counter serial #26
    The serial 1701 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

warn

47 records at the apex

Found

Read from
199.253.108.247:53
TypeValueTTL
SOAussgv1ib03.flygt.com. isglobalnetwork.xyleminc.com. 1701 10800 3600 2419200 90028800
NSns4.flygt.com.28800
NSns3.flygt.com.28800
A199.253.101.6660
MX10 mxb-003d2901.gslb.pphosted.com.300
MX10 mxa-003d2901.gslb.pphosted.com.300
TXT"asuid.selector-east-us=3296BE503B16B3F0EE550732D27F97A8A6A91A03D1D7128702CDE95CFDC008A4"3600
TXT"QuoVadis=0f8e0685-946f-4de7-95e7-fb73c46f71d4"3600
TXT"atlassian-domain-verification=m9P4fbrITge4P+dpQlDFztbSgmvzEugW/tDmQIZaUlfbHyyMafZBnNqz42jVJOCs"3600
TXT"MS=ms66781026"3600
TXT"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"3600
TXT"ciscocidomainverification=7b97b8b72dec04c853c5097553e35b41bead8f86eac4787b648b9b21734920c1"3600
TXT"workplace-domain-verification=moTaHcew7YWWFCHj2DfPWWUPTRb0fq"3600
TXT"docusign=0a22f706-d444-40e8-9792-71ec09fb007d"3600
TXT"google-site-verification=CNLSYlFG9PzsOARiADi_cP7iTo-nqT650YEcj3MR53Q"3600
TXT"docusign=2725ba56-a77e-46c5-8c96-1b187313a5ff"3600
TXT"adobe-idp-site-verification=8ca49cf346aa0779371d24c68e6d09e825385ca1a2a0395d3639d76b95405435"3600
TXT"wiz-domain-verification=9193fa531cb134b8e27e12b86166f62d447bf04e8a94db515393080089b337b3"3600
TXT"cloudhealth=abcac64e-4456-4ceb-a3a2-b737ada4a737"3600
TXT"mongodb-site-verification=YHQrWZdpqeYO91AXt1hItBzqqNe295id"3600
TXT"QuoVadis=5af981a8-38da-4f8f-b33d-86c58b24bfc9"3600
TXT"workplace-domain-verification=38qIom7cydUFHBX1NVU62Jmm6Kd043"3600
TXT"identrust_validate=NpXXjInyvldf8U9S0oe/nCzoYtvEr033IG/rp+spNclC"3600
TXT"identrust_validate=bgVaSn+cLvcpGu/ITCQ1zAa/GJCMWRlbr9422KjIZdNV"3600
TXT"zoho-verification=zb03624742.zmverify.zoho.in"3600
TXT"flexera-domain-verification-sqztpntuxnsixrqq"3600
TXT"61MYHlePnvjm4ZE7bxKdQ2c9zVR/1gYqcUUmyHr/u/Q="3600
TXT"flexera-domain-verification-ouowxyjhhrbatqqz"3600
TXT"status-page-domain-verification=fb5767yc8tg9"3600
TXT"docker-verification=b21e5434-5184-43a8-8da2-513863f09f08"3600
TXT"identrust_validate=YEF2u0suOcMhc8GfbaqLIYpef4FVMn/eoz1b4xYbS54r"3600
TXT"airtable-verification=a1948e50ad4603fe15e0c44511089a6b"3600
TXT"DomainVerification=UWNCG1I62KBLRSBZQDEMN2454UL5QY94LAF1MQHY3AU3NN4C1XABG0GZA7WL0XEY"3600
TXT"smartsheet-site-validation=74-jTXzanAk_daHBy2j9ex60hmGon-hm"3600
TXT"DirectFedAuthUrl=https://sso.connect.pingidentity.com/sso/idp/SSO.saml2?idpid=4434ceca-e385-4866-88d9-54c28b48910c"3600
TXT"48d3be6f-cad7-477e-9ad1-2943d2e9cab5"3600
TXT"anthropic-domain-verification-02m43e=q930dfdyiYxRL1usIyXhuZBTv"3600
TXT"twilio-domain-verification=b5a4f2b76e64548293e265636d11a2cc"3600
TXT"google-gws-recovery-domain-verification=68667337"3600
TXT"identrust_validate=WlDa6GydZ2ZvWyuCGsgmOI9pjJDgHGwEY7qyyUS1M01K"3600
TXT"anthropic-domain-verification-c4b4tk=cK1WFsNxobZWkVjD7TbWbRAIj"3600
TXT"google-gws-recovery-domain-verification=72635202"3600
TXT"google-site-verification=h61y3r9Vt0P8_6scypr3cUlFyWmV337cCwRBEdKgTWA"3600
TXT"identrust_validate=/tiQD3YlznYApTSk1xTXr6Y680ZM0ib4haBOFT0MOkux"3600
TXT"ecostruxure-it-verification=b9255ec4-50b4-4189-96d1-87ad3d5e5dc1"3600
TXT"citrix.mobile.ads.otp=t9quazepv5m09dwil3guj"3600
TXT"asuid.selector-beta-dev" "=" "5D16B10426897023A38FA85181DE05CAB5B716531B440641BE0038059BD1B6D3"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 8h; resolvers may use either.
    #32
  • ✓ 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