Domain report: asuscomm.com

Registration

info

.com generic · Net-Chinese Co., Ltd. · expires 2034-01-08

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.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 2034-01-08 #3

The registration is valid until 2034-01-08 (2635 days).
✓ Transfer locked #4

Registry status: client delete prohibited, client transfer prohibited.
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

warn

ns-nw.asuscomm.com, ns2.asuscomm.com

Nameserver	Addresses	Network (AS)	Glue
ns-nw.asuscomm.com	52.250.42.40	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US	52.250.42.40
ns2.asuscomm.com (parent only)	52.250.42.40	AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US	52.250.42.40

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns-nw.asuscomm.com, ns2.asuscomm.com.

#6
!

NS sets differ

The nameservers at the parent and in the zone should be the same. Only at the parent: ns2.asuscomm.com. ns-nw.asuscomm.com, ns2.asuscomm.com report NS ns-nw.asuscomm.com.

#7
✓ Glue present and correct #8

Glue is published for the nameservers inside the zone: ns-nw.asuscomm.com, ns2.asuscomm.com.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
!

Nameservers in one network

all IPv4 addresses are in 52.250.42.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).

#10
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All nameservers in one AS

All nameserver addresses are announced by one network operator (AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 2 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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All nameserver names under .com

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
!

No IPv6

None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

#13

fail

2 of 2 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns-nw.asuscomm.com 52.250.42.40	NOERROR, 160 ms, authoritative	no	no / no	refused	-
ns2.asuscomm.com 52.250.42.40	NOERROR, 161 ms, authoritative	no	no / no	refused	-

✓ All respond #14

All 2 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.
✗

No DNS over TCP

DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns-nw.asuscomm.com (52.250.42.40): dial tcp 52.250.42.40:53: connect: connection refused; ns2.asuscomm.com (52.250.42.40): dial tcp 52.250.42.40:53: connect: connection refused.

#19
!

No EDNS

These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns-nw.asuscomm.com (52.250.42.40), ns2.asuscomm.com (52.250.42.40).

#20
✓ Public addresses #21

All nameserver addresses are publicly routable.

warn

serial 55 · primary ns-nw.asuscomm.com

Nameserver	Serial
ns-nw.asuscomm.com (52.250.42.40)	55
ns2.asuscomm.com (52.250.42.40)	55

✓ Serial 55 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

negative caching TTL (minimum) 30s is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 8h, retry 2h, expire 7d, negative TTL 30s.

#23
✓ Primary is a public nameserver #24

The primary nameserver ns-nw.asuscomm.com is one of the listed nameservers.
✓ Contact chris1_wang@asuscomm.com #25

The SOA RNAME chris1_wang.asuscomm.com means chris1_wang@asuscomm.com.
✓ Counter serial #26

The serial 55 is a plain counter.

warn

Not signed

warn

5 records at the apex

Type	Value	TTL
SOA	ns-nw.asuscomm.com. chris1_wang.asuscomm.com. 55 28800 7200 604800 30	86400
NS	ns-nw.asuscomm.com.	86400
A	52.250.42.40	86400
MX	10 hostmaster.asuscomm.com.	120
TXT	"Vrn20d-nLvmiEq-FsPwCItKcYL0k4m-HgP2cIo0E47o"	60