slideserve.com

Checked 22 October 2026, 10:44 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2028-04-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
9 April 2008
Last changed
10 April 2023
Expires
9 April 2028
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.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 2028-04-09 #3
    The registration is valid until 2028-04-09 (534 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net
NS in the zone
ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net
NameserverAddressesNetwork (AS)Glue
ns11.constellix.com96.45.80.1 2600:180a:1001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US2600:180a:1001::1 96.45.80.1
ns21.constellix.com46.31.236.1 2600:180b:2001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US2600:180b:2001::1 46.31.236.1
ns31.constellix.com43.247.170.1 2600:180c:3001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US2600:180c:3001::1 43.247.170.1
ns41.constellix.net96.45.81.1 2600:180a:4001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns51.constellix.net46.31.237.1 2600:180b:5001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns61.constellix.net43.247.171.1 2600:180c:6001::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-

Checks

  • ✓ 6 nameservers #6
    Delegated to ns11.constellix.com, ns21.constellix.com, ns31.constellix.com, ns41.constellix.net, ns51.constellix.net, ns61.constellix.net.
  • ✓ 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 6 IPv4 /24s and 6 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16552 (DIGICERT - Tiggee LLC, US): 12 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 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns11.constellix.com 96.45.80.1NOERROR, 3 ms, authoritativenoyes / yesrefused179812
ns11.constellix.com 2600:180a:1001::1NOERROR, 3 ms, authoritativenoyes / yesrefused179812
ns21.constellix.com 46.31.236.1NOERROR, 3 ms, authoritativenoyes / yesrefused105986
ns21.constellix.com 2600:180b:2001::1NOERROR, 3 ms, authoritativenoyes / yesrefused105986
ns31.constellix.com 43.247.170.1NOERROR, 3 ms, authoritativenoyes / yesrefused808515
ns31.constellix.com 2600:180c:3001::1NOERROR, 3 ms, authoritativenoyes / yesrefused808515
ns41.constellix.net 96.45.81.1NOERROR, 3 ms, authoritativenoyes / yesrefused179812
ns41.constellix.net 2600:180a:4001::1NOERROR, 3 ms, authoritativenoyes / yesrefused179812
ns51.constellix.net 46.31.237.1NOERROR, 3 ms, authoritativenoyes / yesrefused105986
ns51.constellix.net 2600:180b:5001::1NOERROR, 3 ms, authoritativenoyes / yesrefused105986
ns61.constellix.net 43.247.171.1NOERROR, 3 ms, authoritativenoyes / yesrefused808515
ns61.constellix.net 2600:180c:6001::1NOERROR, 4 ms, authoritativenoyes / yesrefused808515

Checks

  • ✓ All respond #14
    All 12 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: ns11.constellix.com: "179812"; ns21.constellix.com: "105986"; ns31.constellix.com: "808515"; ns41.constellix.net: "179812"; ns51.constellix.net: "105986"; ns61.constellix.net: "808515".
    #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

warn

serial 2015010322 · primary ns11.constellix.com

Found

Primary (MNAME)
ns11.constellix.com
Contact (RNAME)
dns.constellix.com
Serial
2015010322
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns11.constellix.com (96.45.80.1)2015010322
ns11.constellix.com (2600:180a:1001::1)2015010322
ns21.constellix.com (46.31.236.1)2015010322
ns21.constellix.com (2600:180b:2001::1)2015010322
ns31.constellix.com (43.247.170.1)2015010322
ns31.constellix.com (2600:180c:3001::1)2015010322
ns41.constellix.net (96.45.81.1)2015010322
ns41.constellix.net (2600:180a:4001::1)2015010322
ns51.constellix.net (46.31.237.1)2015010322
ns51.constellix.net (2600:180b:5001::1)2015010322
ns61.constellix.net (43.247.171.1)2015010322
ns61.constellix.net (2600:180c:6001::1)2015010322

Checks

  • ✓ Serial 2015010322 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 1h, expire 14d, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns11.constellix.com is one of the listed nameservers.
  • ✓ Contact dns@constellix.com #25
    The SOA RNAME dns.constellix.com means dns@constellix.com.
  • ✓ Date-based serial #26
    The serial 2015010322 follows the YYYYMMDDnn convention (2015-01-03).

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

18 records at the apex

Found

Read from
96.45.80.1:53
TypeValueTTL
SOAns11.constellix.com. dns.constellix.com. 2015010322 43200 3600 1209600 18086400
NSns41.constellix.net.86400
NSns51.constellix.net.86400
NSns61.constellix.net.86400
NSns11.constellix.com.86400
NSns21.constellix.com.86400
NSns31.constellix.com.86400
A151.101.65.551800
A151.101.129.551800
A151.101.193.551800
A151.101.1.551800
MX1 aspmx.l.google.com.1800
MX10 alt4.aspmx.l.google.com.1800
MX10 alt3.aspmx.l.google.com.1800
MX5 alt2.aspmx.l.google.com.1800
MX5 alt1.aspmx.l.google.com.1800
TXT"google-site-verification=63YkSCKyenKHr_LtwvwGM5LhOh_8_gzRts7Nv5382GU"1800
TXT"v=spf1 include:_spf.google.com include:sendgrid.net ~all"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, MX 30m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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