xcelenergy.com

Checked 22 October 2026, 11:34 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 6 info

Registration

info

.com generic · Network Solutions, LLC · expires 2029-05-28

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
28 May 1999
Last changed
29 March 2026
Expires
28 May 2029
Status
client transfer prohibited
Registry nameservers
authns1.centurylink.net, authns2.centurylink.net
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 2029-05-28 #3
    The registration is valid until 2029-05-28 (949 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

authns1.centurylink.net, authns2.centurylink.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
authns1.centurylink.net, authns2.centurylink.net
NS in the zone
authns1.centurylink.net, authns2.centurylink.net
NameserverAddressesNetwork (AS)Glue
authns1.centurylink.net63.150.72.4 2001:428::5AS209 CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC, US AS209 CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC, US-
authns2.centurylink.net208.44.130.120 2001:428::6AS209 CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC, US AS209 CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: authns1.centurylink.net, authns2.centurylink.net.
    #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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:428::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS209 (CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC, 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 .net
    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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
authns1.centurylink.net 63.150.72.4NOERROR, 100 ms, authoritativenoyes / yesrefused-
authns1.centurylink.net 2001:428::5NOERROR, 93 ms, authoritativenoyes / yesrefused-
authns2.centurylink.net 208.44.130.120NOERROR, 102 ms, authoritativenoyes / yesrefused-
authns2.centurylink.net 2001:428::6NOERROR, 95 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

warn

serial 2156 · primary ibgodn20-vip.xcelcon.com

Found

Primary (MNAME)
ibgodn20-vip.xcelcon.com
Contact (RNAME)
administrator.xcelenergy.com
Serial
2156
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
10 s

Serial per nameserver

NameserverSerial
authns1.centurylink.net (63.150.72.4)2156
authns1.centurylink.net (2001:428::5)2156
authns2.centurylink.net (208.44.130.120)2156
authns2.centurylink.net (2001:428::6)2156

Checks

  • ✓ Serial 2156 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 10s is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 3h, retry 1h, expire 28d, negative TTL 10s.
    #23
  • i
    Hidden master (not resolvable)
    The primary nameserver ibgodn20-vip.xcelcon.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 administrator@xcelenergy.com #25
    The SOA RNAME administrator.xcelenergy.com means administrator@xcelenergy.com.
  • ✓ Counter serial #26
    The serial 2156 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

pass

30 records at the apex

Found

Read from
63.150.72.4:53
TypeValueTTL
SOAibgodn20-vip.xcelcon.com. administrator.xcelenergy.com. 2156 10800 3600 2419200 10900
NSauthns1.centurylink.net.900
NSauthns2.centurylink.net.900
A192.234.135.26900
MX10 mxa-001a3603.gslb.pphosted.com.108000
TXT"docusign=8467754a-dd00-42c5-8c0e-2cb1a44aba51"900
TXT"atlassian-domain-verification=HFdMHRx6cZHdgY51NEOzgbesoom8uqmeygsGBRlPeRMohbcm3N8R2MSY04A6w0Dz"900
TXT"tzsK28lZQyIrLn7izWbGWQ3ST8wLxcwkR1xnW+mzWSuAACQEibnx/GK4KogHaBlAtoAcxWyOF0xox4g9s40+0Q=="900
TXT"MS=ms38239955"900
TXT"heyhack-verification=3f8d626a-36b3-4adf-bd48-d9bfd8a4c3dd"900
TXT"apple-domain-verification=k7v20LuxoC9C8xWj"900
TXT"google-site-verification=El1qAdK_5nB66ppe9nghFPbqZjpEqRLilj9bHlUHsrI"900
TXT"google-site-verification=cusf5n8UWH3uQQDHBp_afkXmOF1g8yuDTYFT8a-ERKk"900
TXT"00d1u0000011ttvuaq"900
TXT"_globalsign-domain-verification=xfkrv3yRwA5GGm0E4l5RlcNKTqVD8KAYsYdCYTBMF0"900
TXT"autodesk-domain-verification=GWo9Ln-qjr_hjIyr7SyV"900
TXT"115021812416121"900
TXT"v=spf1 ip4:192.234.135.34 ip4:192.234.136.20 ip4:107.20.210.250 ip4:52.1.14.157 include:spf.protection.outlook.com include:_spf.salesforce.com a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com -all"900
TXT"facebook-domain-verification=96z0bqaceq4m9m3wvynwtydxcxaroh"900
TXT"cloudhealth=bcee7e7d-ec3c-48d5-ac7f-238a1c68d4d5"900
TXT"google-site-verification=PfpLTKttMR-NvLpCKWL5OyU6AwVXmxxrlTOjPgNNCCU"900
TXT"nintex.5fd255fb197152006f25f8c5"900
TXT"docusign=8e5c49e2-d7a6-4129-883f-fc3db5d554fa"900
CAA0 issue "letsencrypt.org"900
CAA0 issue "globalsign.com"900
CAA0 issuewild "globalsign.com"900
CAA0 issue "oaticerts.com"900
CAA0 issue "pki.goog"900
CAA0 issue "digicert.com"900
CAA0 issue "amazon.com"900

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, MX 30h, NS 15m. The NS TTL at the parent is 2d and in the zone 15m; 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: letsencrypt.org, globalsign.com, oaticerts.com, pki.goog, digicert.com, amazon.com.