pdflib.com

Checked 22 October 2026, 10:12 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · IONOS SE · expires 2027-08-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
IONOS SE
Registered
21 August 1999
Last changed
22 August 2026
Expires
21 August 2027
Status
client transfer prohibited
Registry nameservers
ns1028.ui-dns.de, ns1042.ui-dns.com, ns1096.ui-dns.org, ns1111.ui-dns.biz
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 2027-08-21 #3
    The registration is valid until 2027-08-21 (303 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

ns1028.ui-dns.de, ns1042.ui-dns.com, ns1096.ui-dns.org, ns1111.ui-dns.biz

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1028.ui-dns.de, ns1042.ui-dns.com, ns1096.ui-dns.org, ns1111.ui-dns.biz
NS in the zone
ns1028.ui-dns.de, ns1042.ui-dns.com, ns1096.ui-dns.org, ns1111.ui-dns.biz
NameserverAddressesNetwork (AS)Glue
ns1028.ui-dns.de185.132.32.28 2607:f1c0:fe:53:185:132:32:28AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns1042.ui-dns.com185.132.34.42 2607:f1c0:fe:53:185:132:34:42AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB2001:8d8:fe:53:0:d9a0:522a:100 217.160.82.42
ns1096.ui-dns.org185.132.35.96 2607:f1c0:fe:53:185:132:35:96AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns1111.ui-dns.biz185.132.33.111 2607:f1c0:fe:53:185:132:33:111AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1028.ui-dns.de, ns1042.ui-dns.com, ns1096.ui-dns.org, ns1111.ui-dns.biz.
  • ✓ 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: ns1042.ui-dns.com (glue 2001:8d8:fe:53:0:d9a0:522a:100, 217.160.82.42, zone 185.132.34.42, 2607:f1c0:fe:53:185:132:34:42). 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
ns1028.ui-dns.de 185.132.32.28NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1028.ui-dns.de 2607:f1c0:fe:53:185:132:32:28NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1042.ui-dns.com 185.132.34.42NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1042.ui-dns.com 2607:f1c0:fe:53:185:132:34:42NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1096.ui-dns.org 185.132.35.96NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1096.ui-dns.org 2607:f1c0:fe:53:185:132:35:96NOERROR, 5 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1111.ui-dns.biz 185.132.33.111NOERROR, 6 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns1111.ui-dns.biz 2607:f1c0:fe:53:185:132:33:111NOERROR, 6 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: ns1028.ui-dns.de: "Served by PowerDNS - https://www.powerdns.com/"; ns1042.ui-dns.com: "Served by PowerDNS - https://www.powerdns.com/"; ns1096.ui-dns.org: "Served by PowerDNS - https://www.powerdns.com/"; ns1111.ui-dns.biz: "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 2017080249 · primary ns1096.ui-dns.org

Found

Primary (MNAME)
ns1096.ui-dns.org
Contact (RNAME)
hostmaster.1and1.com
Serial
2017080249
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1028.ui-dns.de (185.132.32.28)2017080249
ns1028.ui-dns.de (2607:f1c0:fe:53:185:132:32:28)2017080249
ns1042.ui-dns.com (185.132.34.42)2017080249
ns1042.ui-dns.com (2607:f1c0:fe:53:185:132:34:42)2017080249
ns1096.ui-dns.org (185.132.35.96)2017080249
ns1096.ui-dns.org (2607:f1c0:fe:53:185:132:35:96)2017080249
ns1111.ui-dns.biz (185.132.33.111)2017080249
ns1111.ui-dns.biz (2607:f1c0:fe:53:185:132:33:111)2017080249

Checks

  • ✓ Serial 2017080249 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 ns1096.ui-dns.org 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 2017080249 follows the YYYYMMDDnn convention (2017-08-02).

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

10 records at the apex

Found

Read from
185.132.32.28:53
TypeValueTTL
SOAns1096.ui-dns.org. hostmaster.1and1.com. 2017080249 28800 7200 604800 30086400
NSns1111.ui-dns.biz.172800
NSns1042.ui-dns.com.172800
NSns1028.ui-dns.de.172800
NSns1096.ui-dns.org.172800
A217.160.0.963600
AAAA2001:8d8:100f:f000::2c93600
MX10 pdflib-com.mail.protection.outlook.com.3600
TXT"MS=ms50831572"3600
TXT"v=spf1 include:_spf.perfora.net include:_spf.kundenserver.de include:spf.m-online.net include:spf.protection.outlook.com ip4:80.81.17.213 ip4:94.143.186.14 -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 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