sciencefocus.com

Checked 22 October 2026, 10:34 UTC · via 8.8.8.8
!Passed with warnings
21 passed 4 warnings 0 failed 6 info

Registration

info

.com generic · Lexsynergy Limited · expires 2027-03-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Lexsynergy Limited
Registered
4 March 2000
Last changed
2 February 2026
Expires
4 March 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns1.imdserve.com, ns2.imdserve.com, ns3.imdserve.com, ns4.imdserve.com, ns5.imdserve.com, ns6.imdserve.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 2027-03-04 #3
    The registration is valid until 2027-03-04 (132 days).
  • ✓ Transfer locked #4
    Registry status: client delete 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

warn

ns1.imdserve.com, ns2.imdserve.com, ns3.imdserve.com, ns4.imdserve.com, ns5.imdserve.com, ns6.imdserve.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.imdserve.com, ns2.imdserve.com, ns3.imdserve.com, ns4.imdserve.com, ns5.imdserve.com, ns6.imdserve.com
NS in the zone
ns20.digicertdns.com, ns21.digicertdns.com, ns22.digicertdns.com, ns23.digicertdns.net, ns24.digicertdns.net, ns25.digicertdns.net
NameserverAddressesNetwork (AS)Glue
ns1.imdserve.com (parent only)208.94.148.4 2600:1800:10::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.94.148.4
ns2.imdserve.com (parent only)208.80.124.4 2600:1801:11::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.124.4
ns20.digicertdns.com (zone only)208.94.148.223 2600:1800:10::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns21.digicertdns.com (zone only)208.80.124.223 2600:1801:11::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns22.digicertdns.com (zone only)208.80.126.223 2600:1802:12::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns23.digicertdns.net (zone only)208.80.125.223 2600:1801:13::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns24.digicertdns.net (zone only)208.80.127.223 2600:1802:14::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns25.digicertdns.net (zone only)208.94.149.223 2600:1800:15::1:1fAS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US-
ns3.imdserve.com (parent only)208.80.126.4 2600:1802:12::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.126.4
ns4.imdserve.com (parent only)208.80.125.4 2600:1801:13::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.125.4
ns5.imdserve.com (parent only)208.80.127.4 2600:1802:14::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.127.4
ns6.imdserve.com (parent only)208.94.149.4 2600:1800:15::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.94.149.4

Checks

  • ✓ 6 nameservers #6
    Delegated to ns1.imdserve.com, ns2.imdserve.com, ns3.imdserve.com, ns4.imdserve.com, ns5.imdserve.com, ns6.imdserve.com.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.imdserve.com, ns2.imdserve.com, ns3.imdserve.com, ns4.imdserve.com, ns5.imdserve.com, ns6.imdserve.com; only in the zone: ns20.digicertdns.com, ns21.digicertdns.com, ns22.digicertdns.com, ns23.digicertdns.net, ns24.digicertdns.net, ns25.digicertdns.net. ns1.imdserve.com, ns2.imdserve.com, ns20.digicertdns.com, ns21.digicertdns.com, ns22.digicertdns.com, ns23.digicertdns.net, ns24.digicertdns.net, ns25.digicertdns.net, ns3.imdserve.com, ns4.imdserve.com, ns5.imdserve.com, ns6.imdserve.com report NS ns20.digicertdns.com ns21.digicertdns.com ns22.digicertdns.com ns23.digicertdns.net ns24.digicertdns.net ns25.digicertdns.net.
    #7
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1.imdserve.com (glue 208.94.148.4, zone 208.94.148.4, 2600:1800:10::1); ns2.imdserve.com (glue 208.80.124.4, zone 208.80.124.4, 2600:1801:11::1); ns3.imdserve.com (glue 208.80.126.4, zone 208.80.126.4, 2600:1802:12::1); ns4.imdserve.com (glue 208.80.125.4, zone 208.80.125.4, 2600:1801:13::1); ns5.imdserve.com (glue 208.80.127.4, zone 208.80.127.4, 2600:1802:14::1); ns6.imdserve.com (glue 208.94.149.4, zone 208.94.149.4, 2600:1800:15::1). Update the glue at your registrar.
    #8
  • ✓ 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): 24 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

24 of 24 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.imdserve.com 208.94.148.4NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns1.imdserve.com 2600:1800:10::1NOERROR, 6 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns2.imdserve.com 208.80.124.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns2.imdserve.com 2600:1801:11::1NOERROR, 24 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns20.digicertdns.com 208.94.148.223NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns20.digicertdns.com 2600:1800:10::1:1fNOERROR, 5 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns21.digicertdns.com 208.80.124.223NOERROR, 24 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns21.digicertdns.com 2600:1801:11::1:1fNOERROR, 24 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns22.digicertdns.com 208.80.126.223NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns22.digicertdns.com 2600:1802:12::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns23.digicertdns.net 208.80.125.223NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns23.digicertdns.net 2600:1801:13::1:1fNOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns24.digicertdns.net 208.80.127.223NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns24.digicertdns.net 2600:1802:14::1:1fNOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns25.digicertdns.net 208.94.149.223NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns25.digicertdns.net 2600:1800:15::1:1fNOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns3.imdserve.com 208.80.126.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns3.imdserve.com 2600:1802:12::1NOERROR, 8 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns4.imdserve.com 208.80.125.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns4.imdserve.com 2600:1801:13::1NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns5.imdserve.com 208.80.127.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns5.imdserve.com 2600:1802:14::1NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns6.imdserve.com 208.94.149.4NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns6.imdserve.com 2600:1800:15::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast

Checks

  • ✓ All respond #14
    All 24 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: ns1.imdserve.com: "DNS Made Easy Anycast"; ns2.imdserve.com: "DNS Made Easy Anycast"; ns20.digicertdns.com: "DNS Made Easy Anycast"; ns21.digicertdns.com: "DNS Made Easy Anycast"; ns22.digicertdns.com: "DNS Made Easy Anycast"; ns23.digicertdns.net: "DNS Made Easy Anycast"; ns24.digicertdns.net: "DNS Made Easy Anycast"; ns25.digicertdns.net: "DNS Made Easy Anycast"; ns3.imdserve.com: "DNS Made Easy Anycast"; ns4.imdserve.com: "DNS Made Easy Anycast"; ns5.imdserve.com: "DNS Made Easy Anycast"; ns6.imdserve.com: "DNS Made Easy Anycast".
    #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 2009010268 · primary ns10.dnsmadeeasy.com

Found

Primary (MNAME)
ns10.dnsmadeeasy.com
Contact (RNAME)
dns.dnsmadeeasy.com
Serial
2009010268
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns1.imdserve.com (208.94.148.4)2009010268
ns1.imdserve.com (2600:1800:10::1)2009010268
ns2.imdserve.com (208.80.124.4)2009010268
ns2.imdserve.com (2600:1801:11::1)2009010268
ns20.digicertdns.com (208.94.148.223)2009010268
ns20.digicertdns.com (2600:1800:10::1:1f)2009010268
ns21.digicertdns.com (208.80.124.223)2009010268
ns21.digicertdns.com (2600:1801:11::1:1f)2009010268
ns22.digicertdns.com (208.80.126.223)2009010268
ns22.digicertdns.com (2600:1802:12::1:1f)2009010268
ns23.digicertdns.net (208.80.125.223)2009010268
ns23.digicertdns.net (2600:1801:13::1:1f)2009010268
ns24.digicertdns.net (208.80.127.223)2009010268
ns24.digicertdns.net (2600:1802:14::1:1f)2009010268
ns25.digicertdns.net (208.94.149.223)2009010268
ns25.digicertdns.net (2600:1800:15::1:1f)2009010268
ns3.imdserve.com (208.80.126.4)2009010268
ns3.imdserve.com (2600:1802:12::1)2009010268
ns4.imdserve.com (208.80.125.4)2009010268
ns4.imdserve.com (2600:1801:13::1)2009010268
ns5.imdserve.com (208.80.127.4)2009010268
ns5.imdserve.com (2600:1802:14::1)2009010268
ns6.imdserve.com (208.94.149.4)2009010268
ns6.imdserve.com (2600:1800:15::1)2009010268

Checks

  • ✓ Serial 2009010268 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
  • i
    Hidden master
    The primary nameserver ns10.dnsmadeeasy.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 dns@dnsmadeeasy.com #25
    The SOA RNAME dns.dnsmadeeasy.com means dns@dnsmadeeasy.com.
  • ✓ Date-based serial #26
    The serial 2009010268 follows the YYYYMMDDnn convention (2009-01-02).

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

20 records at the apex

Found

Read from
208.94.148.4:53
TypeValueTTL
SOAns10.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2009010268 43200 3600 1209600 18086400
NSns22.digicertdns.com.86400
NSns20.digicertdns.com.86400
NSns24.digicertdns.net.86400
NSns25.digicertdns.net.86400
NSns21.digicertdns.com.86400
NSns23.digicertdns.net.86400
A3.124.189.64300
MX10 eu-smtp-inbound-1.mimecast.com.172800
MX10 eu-smtp-inbound-2.mimecast.com.172800
TXT"v=spf1 a mx ip4:78.136.36.160 include:eu._netblocks.mimecast.com include:msgfocus.com include:spf.protection.outlook.com ip4:164.177.142.162 ip4:164.177.142.163 include:spf.mandrillapp.com -all"1800
TXT"_globalsign-domain-verification=90diKXUg9fFz_vxOVpyAM_k4zm7Cn9SmcaJw1ooEGF"1800
TXT"facebook-domain-verification=20cpvbp20xo4bnp264eovhyzx4ymol"1800
TXT"MS=ms56712685"1800
TXT"0ed1fe018a5d7f0f1c200e46bfab91897bd71692ec"1800
TXT"MS=ms43366988"1800
TXT"google-site-verification=86GU3Gl-5FPUvA3sdpqqdEaOR4N6wFzsTUerQibrBz0"1800
TXT"google-site-verification=QKZdiJUzj1Jngo2wzA5793qKUZErmO3U7Ij-RMtKpas"1800
TXT"google-site-verification=Ky6ki_cbO4ISVZZweNA_exy2ETG-F3oh2sYnizL6EG8"1800
TXT"_globalsign-domain-verification=ypTmCodsGVFAp2zOZqygneXH8KL6TPtuVBQ16WReRG"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 2d, 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