Domain report: acer.de

Registration

info

.de country-code

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

info

ns-1108.awsdns-10.org, ns-1642.awsdns-13.co.uk, ns-238.awsdns-29.com, ns-851.awsdns-42.net

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns-1108.awsdns-10.org, ns-1642.awsdns-13.co.uk, ns-238.awsdns-29.com, ns-851.awsdns-42.net
NS in the zone: ns-1108.awsdns-10.org, ns-1642.awsdns-13.co.uk, ns-238.awsdns-29.com, ns-851.awsdns-42.net

Nameserver	Addresses	Network (AS)	Glue
ns-1108.awsdns-10.org	205.251.196.84 2600:9000:5304:5400::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns-1642.awsdns-13.co.uk	205.251.198.106 2600:9000:5306:6a00::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns-238.awsdns-29.com	205.251.192.238 2600:9000:5300:ee00::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns-851.awsdns-42.net	205.251.195.83 2600:9000:5303:5300::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-

✓ 4 nameservers #6

Delegated to ns-1108.awsdns-10.org, ns-1642.awsdns-13.co.uk, ns-238.awsdns-29.com, ns-851.awsdns-42.net.
✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 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 .com, .net, .org, .uk.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

pass

8 of 8 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns-1108.awsdns-10.org 205.251.196.84	NOERROR, 3 ms, authoritative	no	yes / yes	refused	-
ns-1108.awsdns-10.org 2600:9000:5304:5400::1	NOERROR, 7 ms, authoritative	no	yes / yes	refused	-
ns-1642.awsdns-13.co.uk 205.251.198.106	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-1642.awsdns-13.co.uk 2600:9000:5306:6a00::1	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-238.awsdns-29.com 205.251.192.238	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-238.awsdns-29.com 2600:9000:5300:ee00::1	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns-851.awsdns-42.net 205.251.195.83	NOERROR, 3 ms, authoritative	no	yes / yes	refused	-
ns-851.awsdns-42.net 2600:9000:5303:5300::1	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-

✓ 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.
✓ No version disclosed #17

The nameservers don't reveal their software version.
✓ 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.

info

serial 1 · primary ns-460.awsdns-57.com

✓ Serial 1 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
i

Hidden master

The primary nameserver ns-460.awsdns-57.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@admin.acer.com #25

The SOA RNAME dns.admin.acer.com means dns@admin.acer.com.
✓ Counter serial #26

The serial 1 is a plain counter.

warn

Not signed

warn

8 records at the apex

Type	Value	TTL
SOA	ns-460.awsdns-57.com. dns.admin.acer.com. 1 7200 900 1209600 86400	900
NS	ns-1108.awsdns-10.org.	172800
NS	ns-1642.awsdns-13.co.uk.	172800
NS	ns-238.awsdns-29.com.	172800
NS	ns-851.awsdns-42.net.	172800
A	54.168.146.98	60
A	52.199.44.156	60
TXT	"v=spf1 -all"	300