scalzi.com

Checked 22 October 2026, 10:34 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · IONOS SE · expires 2027-03-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
IONOS SE
Registered
4 March 1998
Last changed
4 March 2026
Expires
3 March 2027
Status
client transfer prohibited
Registry nameservers
ns1038.ui-dns.de, ns1051.ui-dns.biz, ns1079.ui-dns.com, ns1108.ui-dns.org
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 2027-03-03 #3
    The registration is valid until 2027-03-03 (131 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

warn

ns1038.ui-dns.de, ns1051.ui-dns.biz, ns1079.ui-dns.com, ns1108.ui-dns.org

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1038.ui-dns.de, ns1051.ui-dns.biz, ns1079.ui-dns.com, ns1108.ui-dns.org
NS in the zone
ns1038.ui-dns.de, ns1051.ui-dns.biz, ns1079.ui-dns.com, ns1108.ui-dns.org
NameserverAddressesNetwork (AS)Glue
ns1038.ui-dns.de185.132.32.38 2607:f1c0:fe:53:185:132:32:38AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns1051.ui-dns.biz185.132.33.51 2607:f1c0:fe:53:185:132:33:51AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns1079.ui-dns.com185.132.34.79 2607:f1c0:fe:53:185:132:34:79AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB2001:8d8:fe:53:0:d9a0:524f:100 217.160.82.79
ns1108.ui-dns.org185.132.35.108 2607:f1c0:fe:53:185:132:35:108AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1038.ui-dns.de, ns1051.ui-dns.biz, ns1079.ui-dns.com, ns1108.ui-dns.org.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1079.ui-dns.com (glue 2001:8d8:fe:53:0:d9a0:524f:100, 217.160.82.79, zone 185.132.34.79, 2607:f1c0:fe:53:185:132:34:79). Update the glue at your registrar.
    #8
  • ✓ 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 2607:f1c0:fe::/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 (AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 8 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 .biz, .com, .de, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1038.ui-dns.de 185.132.32.38NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1038.ui-dns.de 2607:f1c0:fe:53:185:132:32:38NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1051.ui-dns.biz 185.132.33.51NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1051.ui-dns.biz 2607:f1c0:fe:53:185:132:33:51NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1079.ui-dns.com 185.132.34.79NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1079.ui-dns.com 2607:f1c0:fe:53:185:132:34:79NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1108.ui-dns.org 185.132.35.108NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1108.ui-dns.org 2607:f1c0:fe:53:185:132:35:108NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 8 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: ns1038.ui-dns.de: "Served by PowerDNS - https://www.powerdns.com/"; ns1051.ui-dns.biz: "Served by PowerDNS - https://www.powerdns.com/"; ns1079.ui-dns.com: "Served by PowerDNS - https://www.powerdns.com/"; ns1108.ui-dns.org: "Served by PowerDNS - https://www.powerdns.com/".
    #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 2016010930 · primary ns1038.ui-dns.de

Found

Primary (MNAME)
ns1038.ui-dns.de
Contact (RNAME)
hostmaster.1and1.com
Serial
2016010930
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1038.ui-dns.de (185.132.32.38)2016010930
ns1038.ui-dns.de (2607:f1c0:fe:53:185:132:32:38)2016010930
ns1051.ui-dns.biz (185.132.33.51)2016010930
ns1051.ui-dns.biz (2607:f1c0:fe:53:185:132:33:51)2016010930
ns1079.ui-dns.com (185.132.34.79)2016010930
ns1079.ui-dns.com (2607:f1c0:fe:53:185:132:34:79)2016010930
ns1108.ui-dns.org (185.132.35.108)2016010930
ns1108.ui-dns.org (2607:f1c0:fe:53:185:132:35:108)2016010930

Checks

  • ✓ Serial 2016010930 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1038.ui-dns.de is one of the listed nameservers.
  • ✓ Contact hostmaster@1and1.com #25
    The SOA RNAME hostmaster.1and1.com means hostmaster@1and1.com.
  • ✓ Date-based serial #26
    The serial 2016010930 follows the YYYYMMDDnn convention (2016-01-09).

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

9 records at the apex

Found

Read from
185.132.32.38:53
TypeValueTTL
SOAns1038.ui-dns.de. hostmaster.1and1.com. 2016010930 28800 7200 604800 30086400
NSns1051.ui-dns.biz.172800
NSns1108.ui-dns.org.172800
NSns1038.ui-dns.de.172800
NSns1079.ui-dns.com.172800
A74.208.236.1653600
MX10 mx01.ionos.com.3600
MX10 mx00.ionos.com.3600
TXT"v=spf1 include:_spf-us.ionos.com ~all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 2d.
  • ✓ 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