yelp.de

Checked 22 October 2026, 01:10 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 warnings 0 failed 6 info

Registration

info

.de country-code

Found

TLD
.de (country-code)
ICANN policies apply
no

Checks

  • i
    .de is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .de is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

info

dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns01.midtowndoornailns.com, ns02.midtowndoornailns.com, ns03.midtowndoornailns.com, ns04.midtowndoornailns.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns01.midtowndoornailns.com, ns02.midtowndoornailns.com, ns03.midtowndoornailns.com, ns04.midtowndoornailns.com
NS in the zone
dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns01.midtowndoornailns.com, ns02.midtowndoornailns.com, ns03.midtowndoornailns.com, ns04.midtowndoornailns.com
NameserverAddressesNetwork (AS)Glue
dns1.p08.nsone.net198.51.44.8 2620:4d:4000:6259:7:8:0:1AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns2.p08.nsone.net198.51.45.8 2a00:edc0:6259:7:8::2AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns3.p08.nsone.net198.51.44.72 2620:4d:4000:6259:7:8:0:3AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns4.p08.nsone.net198.51.45.72 2a00:edc0:6259:7:8::4AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
ns01.midtowndoornailns.com45.54.54.1AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US-
ns02.midtowndoornailns.com45.54.54.65AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US-
ns03.midtowndoornailns.com45.54.54.129AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US-
ns04.midtowndoornailns.com45.54.54.193AS63911 NETACTUATE-AS-AP - NetActuate, Inc, US-

Checks

  • ✓ 8 nameservers #6
    Delegated to dns1.p08.nsone.net, dns2.p08.nsone.net, dns3.p08.nsone.net, dns4.p08.nsone.net, ns01.midtowndoornailns.com, ns02.midtowndoornailns.com, ns03.midtowndoornailns.com, ns04.midtowndoornailns.com.
  • ✓ 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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS62597 (NSONE - NSONE Inc, US): 8 addresses; AS63911 (NETACTUATE-AS-AP - NetActuate, Inc, US): 4 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns01.midtowndoornailns.com, ns02.midtowndoornailns.com, ns03.midtowndoornailns.com, ns04.midtowndoornailns.com.
    #13

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.p08.nsone.net 198.51.44.8NOERROR, 6 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns1.p08.nsone.net 2620:4d:4000:6259:7:8:0:1NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p08.nsone.net 198.51.45.8NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p08.nsone.net 2a00:edc0:6259:7:8::2NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p08.nsone.net 198.51.44.72NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p08.nsone.net 2620:4d:4000:6259:7:8:0:3NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p08.nsone.net 198.51.45.72NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p08.nsone.net 2a00:edc0:6259:7:8::4NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns01.midtowndoornailns.com 45.54.54.1NOERROR, 19 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns02.midtowndoornailns.com 45.54.54.65NOERROR, 19 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns03.midtowndoornailns.com 45.54.54.129NOERROR, 20 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
ns04.midtowndoornailns.com 45.54.54.193NOERROR, 20 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9

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: dns1.p08.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns2.p08.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns3.p08.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns4.p08.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; ns01.midtowndoornailns.com: "19dd46e347df36b70933bf2be8023258586586a9"; ns02.midtowndoornailns.com: "19dd46e347df36b70933bf2be8023258586586a9"; ns03.midtowndoornailns.com: "19dd46e347df36b70933bf2be8023258586586a9"; ns04.midtowndoornailns.com: "19dd46e347df36b70933bf2be8023258586586a9".
    #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 1644351313 · primary dns1.p08.nsone.net

Found

Primary (MNAME)
dns1.p08.nsone.net
Contact (RNAME)
hostmaster.nsone.net
Serial
1644351313
Refresh / retry
43200 s / 900 s
Expire
604800 s
Negative TTL
60 s

Serial per nameserver

NameserverSerial
dns1.p08.nsone.net (198.51.44.8)1644351313
dns1.p08.nsone.net (2620:4d:4000:6259:7:8:0:1)1644351313
dns2.p08.nsone.net (198.51.45.8)1644351313
dns2.p08.nsone.net (2a00:edc0:6259:7:8::2)1644351313
dns3.p08.nsone.net (198.51.44.72)1644351313
dns3.p08.nsone.net (2620:4d:4000:6259:7:8:0:3)1644351313
dns4.p08.nsone.net (198.51.45.72)1644351313
dns4.p08.nsone.net (2a00:edc0:6259:7:8::4)1644351313
ns01.midtowndoornailns.com (45.54.54.1)1644351313
ns02.midtowndoornailns.com (45.54.54.65)1644351313
ns03.midtowndoornailns.com (45.54.54.129)1644351313
ns04.midtowndoornailns.com (45.54.54.193)1644351313

Checks

  • ✓ Serial 1644351313 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 15m, expire 7d, negative TTL 1m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.p08.nsone.net is one of the listed nameservers.
  • ✓ Contact hostmaster@nsone.net #25
    The SOA RNAME hostmaster.nsone.net means hostmaster@nsone.net.
  • ✓ Timestamp serial #26
    The serial 1644351313 is a Unix timestamp (2022-02-08 20:15 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

17 records at the apex

Found

Read from
198.51.44.8:53
TypeValueTTL
SOAdns1.p08.nsone.net. hostmaster.nsone.net. 1644351313 43200 900 604800 60600
NSdns1.p08.nsone.net.600
NSdns2.p08.nsone.net.600
NSdns3.p08.nsone.net.600
NSdns4.p08.nsone.net.600
NSns01.midtowndoornailns.com.600
NSns02.midtowndoornailns.com.600
NSns03.midtowndoornailns.com.600
NSns04.midtowndoornailns.com.600
A65.8.131.3022
A65.8.131.8822
A65.8.131.12122
A65.8.131.10922
MX1 corpmx.yelpcorp.com.3600
TXT"google-site-verification="3600
TXT"None"3600
TXT"v=spf1 ip4:198.51.132.21 ip4:199.255.188.0/22 ip4:209.177.160.9 ip4:209.177.164.34 ip4:209.177.168.2 include:servers.mcsv.net include:_spf1.yelp.com -all"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (22s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 10m; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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