spectrum.com

Checked 22 October 2026, 10:50 UTC · via 8.8.8.8
!Passed with warnings
23 passed 4 warnings 0 failed 4 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-07-26

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
27 July 1994
Last changed
22 July 2026
Expires
26 July 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.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 2027-07-26 #3
    The registration is valid until 2027-07-26 (276 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

ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com
NS in the zone
a1-187.akam.net, a11-66.akam.net, a12-66.akam.net, a18-65.akam.net, a2-65.akam.net, a7-66.akam.net
NameserverAddressesNetwork (AS)Glue
a1-187.akam.net (zone only)193.108.91.187 2600:1401:2::bbAS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-66.akam.net (zone only)84.53.139.66 2600:1480:1::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a12-66.akam.net (zone only)184.26.160.66 2600:1480:f000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a18-65.akam.net (zone only)95.101.36.65 2600:1480:4800::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-65.akam.net (zone only)95.100.174.65 2600:1480:7000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-66.akam.net (zone only)23.61.199.66 2600:1406:32::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
ns1.charter.com (parent only)24.216.90.1AS20115 CHARTER-20115 - Charter Communications LLC, US24.216.90.1
ns2.charter.com (parent only)24.216.90.2AS20115 CHARTER-20115 - Charter Communications LLC, US24.216.90.2
ns3.charter.com (parent only)24.240.146.1AS20115 CHARTER-20115 - Charter Communications LLC, US24.240.146.1
ns4.charter.com (parent only)24.240.146.2AS20115 CHARTER-20115 - Charter Communications LLC, US24.240.146.2

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com; only in the zone: a1-187.akam.net, a11-66.akam.net, a12-66.akam.net, a18-65.akam.net, a2-65.akam.net, a7-66.akam.net. a1-187.akam.net, a11-66.akam.net, a12-66.akam.net, a18-65.akam.net, a2-65.akam.net, a7-66.akam.net, ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com report NS a1-187.akam.net a11-66.akam.net a12-66.akam.net a18-65.akam.net a2-65.akam.net a7-66.akam.net.
    #7
  • ✓ 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 8 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS20115 (CHARTER-20115 - Charter Communications LLC, US): 4 addresses; AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 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: ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com.
    #13

Nameservers

warn

16 of 16 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-187.akam.net 193.108.91.187NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a1-187.akam.net 2600:1401:2::bbNOERROR, 4 ms, authoritativenoyes / yesrefused41824.10
a11-66.akam.net 84.53.139.66NOERROR, 5 ms, authoritativenoyes / yesrefused41824.8
a11-66.akam.net 2600:1480:1::42NOERROR, 5 ms, authoritativenoyes / yesrefused41824.4
a12-66.akam.net 184.26.160.66NOERROR, 5 ms, authoritativenoyes / yesrefused48878.27
a12-66.akam.net 2600:1480:f000::42NOERROR, 5 ms, authoritativenoyes / yesrefused48878.30
a18-65.akam.net 95.101.36.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a18-65.akam.net 2600:1480:4800::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a2-65.akam.net 95.100.174.65NOERROR, 5 ms, authoritativenoyes / yesrefused48878.30
a2-65.akam.net 2600:1480:7000::41NOERROR, 5 ms, authoritativenoyes / yesrefused48878.33
a7-66.akam.net 23.61.199.66NOERROR, 5 ms, authoritativenoyes / yesrefused41824.7
a7-66.akam.net 2600:1406:32::42NOERROR, 5 ms, authoritativenoyes / yesrefused41824.9
ns1.charter.com 24.216.90.1NOERROR, 122 ms, authoritativenoyes / yesrefusedlol
ns2.charter.com 24.216.90.2NOERROR, 117 ms, authoritativenoyes / yesrefusedlol
ns3.charter.com 24.240.146.1NOERROR, 116 ms, authoritativenoyes / yesrefusedlol
ns4.charter.com 24.240.146.2NOERROR, 126 ms, authoritativenoyes / yesrefusedlol

Checks

  • ✓ All respond #14
    All 16 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-187.akam.net: "41824.6"; a1-187.akam.net: "41824.10"; a11-66.akam.net: "41824.8"; a11-66.akam.net: "41824.4"; a12-66.akam.net: "48878.27"; a12-66.akam.net: "48878.30"; a18-65.akam.net: "48878.33"; a18-65.akam.net: "48878.31"; a2-65.akam.net: "48878.30"; a2-65.akam.net: "48878.33"; a7-66.akam.net: "41824.7"; a7-66.akam.net: "41824.9". Hide or replace the version string.
    #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.

SOA

pass

serial 2026090406 · primary ns1.charter.com

Found

Primary (MNAME)
ns1.charter.com
Contact (RNAME)
hostmaster.charter.com
Serial
2026090406
Refresh / retry
43200 s / 3600 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
a1-187.akam.net (193.108.91.187)2026090406
a1-187.akam.net (2600:1401:2::bb)2026090406
a11-66.akam.net (84.53.139.66)2026090406
a11-66.akam.net (2600:1480:1::42)2026090406
a12-66.akam.net (184.26.160.66)2026090406
a12-66.akam.net (2600:1480:f000::42)2026090406
a18-65.akam.net (95.101.36.65)2026090406
a18-65.akam.net (2600:1480:4800::41)2026090406
a2-65.akam.net (95.100.174.65)2026090406
a2-65.akam.net (2600:1480:7000::41)2026090406
a7-66.akam.net (23.61.199.66)2026090406
a7-66.akam.net (2600:1406:32::42)2026090406
ns1.charter.com (24.216.90.1)2026090406
ns2.charter.com (24.216.90.2)2026090406
ns3.charter.com (24.240.146.1)2026090406
ns4.charter.com (24.240.146.2)2026090406

Checks

  • ✓ Serial 2026090406 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 1h, expire 28d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.charter.com is one of the listed nameservers.
  • ✓ Contact hostmaster@charter.com #25
    The SOA RNAME hostmaster.charter.com means hostmaster@charter.com.
  • ✓ Date-based serial #26
    The serial 2026090406 follows the YYYYMMDDnn convention (2026-09-04).

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

49 records at the apex

Found

Read from
193.108.91.187:53
TypeValueTTL
SOAns1.charter.com. hostmaster.charter.com. 2026090406 43200 3600 2419200 360043200
NSa7-66.akam.net.43200
NSa18-65.akam.net.43200
NSa1-187.akam.net.43200
NSa2-65.akam.net.43200
NSa11-66.akam.net.43200
NSa12-66.akam.net.43200
A104.82.98.19320
AAAA2a02:26f0:b700:38c::122a20
AAAA2a02:26f0:b700:383::122a20
MX0 spectrum-com.mail.protection.outlook.com.14400
TXT"_ec65e45dac93fc3934fa5fdbb9bcf36a.spectrum.com."14400
TXT"smartsheet-site-validation=ZeIXL7WWBXaeYMbk20Nj0Bw6wd-DZdtV"14400
TXT"figma-domain-verification=d6976db429d27190853a51e2a795ca7f543818bcf389f6f21237a60902462b1a-1743432666"14400
TXT"dr7h5d42l6onl2cunp6l5lfec2"14400
TXT"pexip-ms-tenant-domain-verification=e09712b4-39a7-44ce-a036-a242f0e3f332"14400
TXT"miro-verification=e51116d30341c8179b1529830f0d0a994990af6e"14400
TXT"paloaltonetworks-site-verification=0f8aee8f1efecd666f61dd2e122cd3cd4fd01559231867de7421bbbd7ff5ec70"14400
TXT"00D41000000cQ2w=1TB7y00000009rJ"14400
TXT"_29620b79c3743504308685c884570739.spectrum.com."14400
TXT"cisco-ci-domain-verification=2616c4069abfb4cde83eab2f36c7645638aa84439c3b46f75372f9e9d945ee40"14400
TXT"00DO200000EkTBq=1TBO20000000ERB"14400
TXT"anthropic-domain-verification-rs19vn=hBt71QbMoLxxZ8xOOuxMByp8G"14400
TXT"ms=ms45056673"14400
TXT"wrike-verification=NjkzNDcyNTo1NmUwOTdiZjNhNmU5ZWI3ZmQ4NDM0MjIyZjQwZTY4ZDE0ZGQyYzFjOTAwNzAwNjAwNWI3ZWI1Y2JkZTYzZWFi"14400
TXT"@ MS=ms86718722"14400
TXT"docusign=f0e077d7-0eb2-4fc6-bd99-7cfe6227e228"14400
TXT"lucid-verification=crz_byg9nke4bne1QBP"14400
TXT"v=spf1 ip4:142.136.234.128/27 ip4:142.136.235.128/27 include:aspmx.pardot.com include:spf.protection.outlook.com ~all"14400
TXT"00DWB000006aAgX=1TBWB00000002Ej"14400
TXT"google-site-verification=QQsT4V9HBHhkUnVgV7QXFH1NiS-Ug-L28YxfbmBVyeo"14400
TXT"_0560d4c7f0ee467cfa8856068f5120e9.djqtsrsxkq.acm-validations.aws."14400
TXT"adobe-idp-site-verification=204abc57a67dcfff034aee07aa9db2a7577ce9bdb3bf45a3657c0a2a3fecb289"14400
TXT"facebook-domain-verification=gggrjx1q04wkwyb3g51ew9a0uvb3h0b"14400
TXT"postman-domain-verification=03636d118ea216ce2b7deaec31ccd70b5f593e1d0cbfec3b6b47f4f6da1358101082916a55e4fa40acd5541eb52fec96427b142cc83eae0186e509736b16a808"14400
TXT"flexera-domain-verification-oaimpehnwckstwhr"14400
TXT"insomnia-validation=8a6b7b20c0fb4a2ab8d7b0be5ff831eb6de71f05784d5ea690f05be80384dfc4"14400
TXT"facebook-domain-verification=oh9iz8g9in0fc1uzwop7nqa2qhgwqs"14400
TXT"flexera-domain-verification-lblhsdtuutrgdumi"14400
TXT"_4b8dc5b762cd5b4abdfdb6ea9237829e.zfyfvmchrl.acm-validations.aws."14400
TXT"docker-verification=5484f6dd-6c7e-4cdd-9f16-715034d56455"14400
TXT"smartsheet-site-validation=jOF0xArkkltDAbImVHr7xIkIaRJ-yeFI"14400
TXT"ms-domain-verification=31dce107-7863-4da1-91ec-acba091a8778"14400
TXT"atlassian-domain-verification=5q5r35hSgdQxHaBJ0S0BVJ9CBnmQ5/PNh8dPKJF6oHvKHTI4diJ2cF0L8r0wPxwH"14400
TXT"apple-domain-verification=ljFf9Ht3HWJXytvP34auvCc5G2VOU1m2FKzRBTWtjZc"14400
TXT"google-site-verification=0bRYti_wd6n2BgDhRaJ7JazASd9YHEzMGyX3fDXN36o"14400
TXT"SFMC-m2xZGT7-Ntc-O1HYMTGFW_SXjGyI_plkuo6mae4V"14400
TXT"docusign=a0cbf796-bb93-4544-bab0-f637c55cc80d"14400
TXT"7HLhOjsPmLXtqhkcpc7LvXFaZW1zjHo1-YAi1t7K5gESLZakuNo7NQ"14400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 12h; 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