nature.com

Checked 22 October 2026, 10:00 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2028-08-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
11 August 1994
Last changed
5 August 2026
Expires
10 August 2028
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk
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 2028-08-10 #3
    The registration is valid until 2028-08-10 (657 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

info

pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk
NS in the zone
pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk
NameserverAddressesNetwork (AS)Glue
pdns1.ultradns.net204.74.108.1 2001:502:f3ff::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns2.ultradns.net204.74.109.1 2610:a1:1014::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns3.ultradns.org199.7.68.1 2610:a1:1015::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns4.ultradns.org199.7.69.1 2001:502:4612::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns5.ultradns.info204.74.114.1 2610:a1:1016::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns6.ultradns.co.uk204.74.115.1 2610:a1:1017::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • ✓ 6 nameservers #6
    Delegated to pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk.
  • ✓ 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 (AS12008 (VERCARA - Vercara, 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 4 TLDs #12
    Nameserver names use the TLDs .info, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
pdns1.ultradns.net 204.74.108.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns1.ultradns.net 2001:502:f3ff::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns2.ultradns.net 204.74.109.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns2.ultradns.net 2610:a1:1014::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns3.ultradns.org 199.7.68.1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns3.ultradns.org 2610:a1:1015::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns4.ultradns.org 199.7.69.1NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns4.ultradns.org 2001:502:4612::1NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns5.ultradns.info 204.74.114.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns5.ultradns.info 2610:a1:1016::1NOERROR, 7 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns6.ultradns.co.uk 204.74.115.1NOERROR, 13 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns6.ultradns.co.uk 2610:a1:1017::1NOERROR, 17 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

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: pdns1.ultradns.net: "UltraDNS Nameserver"; pdns2.ultradns.net: "UltraDNS Nameserver"; pdns3.ultradns.org: "UltraDNS Nameserver"; pdns4.ultradns.org: "UltraDNS Nameserver"; pdns5.ultradns.info: "UltraDNS Nameserver"; pdns6.ultradns.co.uk: "UltraDNS Nameserver".
    #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 2018163455 · primary pdns1.ultradns.net

Found

Primary (MNAME)
pdns1.ultradns.net
Contact (RNAME)
dnsmaster.nature.com
Serial
2018163455
Refresh / retry
3600 s / 900 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
pdns1.ultradns.net (204.74.108.1)2018163455
pdns1.ultradns.net (2001:502:f3ff::1)2018163455
pdns2.ultradns.net (204.74.109.1)2018163455
pdns2.ultradns.net (2610:a1:1014::1)2018163455
pdns3.ultradns.org (199.7.68.1)2018163455
pdns3.ultradns.org (2610:a1:1015::1)2018163455
pdns4.ultradns.org (199.7.69.1)2018163455
pdns4.ultradns.org (2001:502:4612::1)2018163455
pdns5.ultradns.info (204.74.114.1)2018163455
pdns5.ultradns.info (2610:a1:1016::1)2018163455
pdns6.ultradns.co.uk (204.74.115.1)2018163455
pdns6.ultradns.co.uk (2610:a1:1017::1)2018163455

Checks

  • ✓ Serial 2018163455 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 15m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver pdns1.ultradns.net is one of the listed nameservers.
  • ✓ Contact dnsmaster@nature.com #25
    The SOA RNAME dnsmaster.nature.com means dnsmaster@nature.com.
  • ✓ Timestamp serial #26
    The serial 2018163455 is a Unix timestamp (2033-12-14 08:57 UTC).

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

48 records at the apex

Found

Read from
204.74.108.1:53
TypeValueTTL
SOApdns1.ultradns.net. dnsmaster.nature.com. 2018163455 3600 900 604800 360086400
NSpdns1.ultradns.net.86400
NSpdns2.ultradns.net.86400
NSpdns3.ultradns.org.86400
NSpdns4.ultradns.org.86400
NSpdns5.ultradns.info.86400
NSpdns6.ultradns.co.uk.86400
A146.75.116.9558
MX10 mxa-002c5801.gslb.pphosted.com.86400
MX10 mxb-002c5801.gslb.pphosted.com.86400
TXT"MS=ms77610658"86400
TXT"MS=ms87841658"86400
TXT"rpi5f08jedse2mt8382r95tj80."86400
TXT"Hello GlobalSign CEOS1602043687"86400
TXT"klaviyo-site-verification=RGffrp"86400
TXT"klaviyo-site-verification=SfRYxc"86400
TXT"klaviyo-site-verification=U8sqV2"86400
TXT"klaviyo-site-verification=UNZdq4"86400
TXT"klaviyo-site-verification=UzNPXX"86400
TXT"lovable_verification=RRjvRYYzlyNRyQgjsp9U"86400
TXT"docusign=67f44eaf-0dbe-458b-b10f-47bed1b15935"86400
TXT"docusign=7172e4ac-506c-48bb-9a02-40aa4f5970e4"86400
TXT"canva-site-verification=uyK4bK0s0B6XTjkr-evkKA"86400
TXT"1password-site-verification=55KOGYWRMNDKRKUTDFSXF3WSYY"86400
TXT"elevenlabs=IzVhiRt3uxo8ZMX_GxWWnO8BD5tqECcuYRAvtJ9M4_k"86400
TXT"openai-domain-verification=dv-HAPMMiP9yzTJ3yFoeETfV7vd"86400
TXT"shopify-verification-code=JAHiN7KQ1pbmGdnz9wgaKYgm5VCazy"86400
TXT"deepl-domain-verification=b8faec8a0acd4830a6c745d36a104c04"86400
TXT"facebook-domain-verification=jkc3tvps7b0r4s2a8go26hb3mur2ug"86400
TXT"onetrust-domain-verification=2fb9af66a4f8427c81ef817cc2fc7e5a"86400
TXT"anthropic-domain-verification-gbdrks=ymGP6KhyvFPcXIZ715PJVvZ3L"86400
TXT"extensis-domain-verification=247a2c5e-b2c3-477e-a1a1-69522ce10b98"86400
TXT"monday-com-verification=gAZywa4vaGsfLg6nd5lzh_H0u2mYn7u-W075cd-3X78"86400
TXT"monday-com-verification=gIfsbiBtQzvmY8SR8gmXmURzurNdeyafwCzP_vHk4wk"86400
TXT"google-site-verification=98cpzBJjv18c55LqVgp5mgYFTzGU6fLcF5t9GoTbbog"86400
TXT"google-site-verification=HHD68pull8xzsrxD3nrcvVeVgIWS8Ou3WfObgKmsAeU"86400
TXT"google-site-verification=MMKRJQfefRehxhwEreFHykRsf_auok6vGwCrP1fz-r4"86400
TXT"google-site-verification=ieCNIjjta99aFWzeD9Mhze-lTbXHZo6GAc-MgXlclL4"86400
TXT"google-site-verification=k7pclGN55ftDU-TcQZ1EkFy7EBSsxDUY79dYzxeVTQA"86400
TXT"google-site-verification=tYWiePuSRFUVlICaU0QdGNwirIvpr0YcTjConBwD6Cc"86400
TXT"zapier-domain-verification-challenge=3621a905-479a-4476-b1c9-c153c4b7537c"86400
TXT"_globalsign-domain-verification=IG4UdrI9gc_SVSE132aTagdWhxkvONdbIBhHhhcMlP"86400
TXT"adobe-idp-site-verification=e7d316e26179ad0d4b3f90cf2a0754eec7efe5ffd4e42fd68fb1bf562238e1e5"86400
TXT"cisco-ci-domain-verification=22a12fd0333f8053f7ff6792fa99da4b2a9f4833da46146e49cb65d7cd75ca26"86400
TXT"cisco-ci-domain-verification=2994122b15fd1403b4a698555609ab4fa873bf7e2dcbd7c3ab141489d06e9b7c"86400
TXT"atlassian-domain-verification=8YyRB1dGCFU6FTIcUt18raWzPoKaOFUG7xiFOkac8XcGVOZgEtzvjUqsWaClhXdJ"86400
TXT"figma-domain-verification=a02807ceec187285dae088008460ab5e258fd494d08ac0c2c56f3739ff32437f-1713256355"86400
TXT"v=spf1 ip4:195.128.10.18/32 ip4:195.128.10.15/32 ip4:195.128.10.69/32 ip4:195.128.10.25/32 ip4:195.128.10.24/32 ip4:195.128.10.23/32 ip4:203.200.192.105/32 ip4:203.200.192.109/32 ip4:167.89.16.99/32 ip4:66.159.232.113/32 ip4:66.159.234.15/32 ip4:208.85.55" ".170/32 ip4:208.85.55.173/32 ip4:199.168.14.54/32 ip4:192.87.127.243/32 ip4:192.87.127.244/32 ip4:208.185.229.0/24 ip4:208.185.235.0/24 ip4:52.43.154.216 ip4:192.174.90.93 ip4:52.41.1.125 ip4:192.174.90.94 ip4:192.174.90.91 include:spf.mandrillapp.com inc" "lude:servers.mcsv.net include:spf.flowmailer.net include:spf-002c5801.pphosted.com include:ses.echobox.com include:fc3949.cuenote.jp include:_spf.salesforce.com -all"86400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (58s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1d; 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