Domain report: intcomedical.com

Registration

info

.com generic · Alibaba Cloud Computing (Beijing) Co., Ltd. · expires 2028-09-05

Found

TLD: .com (generic)
ICANN policies apply: yes
Registrar: Alibaba Cloud Computing (Beijing) Co., Ltd.
Registered: 5 September 2006
Last changed: 24 August 2024
Expires: 5 September 2028
Status: active
Registry nameservers: dns17.hichina.com, dns18.hichina.com
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 2028-09-05 #3

The registration is valid until 2028-09-05 (684 days).
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No transfer lock

The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.

#4
✓ Registry and delegation match #5

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

Delegation

info

dns17.hichina.com, dns18.hichina.com

Found

Parent zone: com
Delegation from: a.gtld-servers.net (192.5.6.30)
NS at the parent: dns17.hichina.com, dns18.hichina.com
NS in the zone: dns17.hichina.com, dns18.hichina.com

Nameserver	Addresses	Network (AS)	Glue
dns17.hichina.com	139.224.142.110 120.76.107.60 47.118.199.220 39.96.153.60 39.96.153.40 120.76.107.40 139.224.142.100 47.118.199.200 2408:4009:501::25	AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN	120.76.107.40 120.76.107.60 139.224.142.100 139.224.142.110 2408:4009:501::25 39.96.153.40 39.96.153.60 47.118.199.200 47.118.199.220
dns18.hichina.com	139.224.142.108 47.118.199.198 47.118.199.222 139.224.142.98 39.96.153.61 120.76.107.61 39.96.153.38 120.76.107.38 2408:4009:501::26	AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN AS37963 ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN	120.76.107.38 120.76.107.61 139.224.142.108 139.224.142.98 2408:4009:501::26 39.96.153.38 39.96.153.61 47.118.199.198 47.118.199.222

Checks

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns17.hichina.com, dns18.hichina.com.

#6
✓ 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.
i

One address family in one network

all IPv6 addresses are in 2408:4009:501::/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 (AS37963 (ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd., CN): 18 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
i

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
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

18 of 18 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns17.hichina.com 139.224.142.110	NOERROR, 201 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 120.76.107.60	NOERROR, 197 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 47.118.199.220	NOERROR, 202 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 39.96.153.60	NOERROR, 161 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 39.96.153.40	NOERROR, 165 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 120.76.107.40	NOERROR, 208 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 139.224.142.100	NOERROR, 170 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 47.118.199.200	NOERROR, 237 ms, authoritative	no	yes / yes	refused	-
dns17.hichina.com 2408:4009:501::25	NOERROR, 192 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 139.224.142.108	NOERROR, 208 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 47.118.199.198	NOERROR, 224 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 47.118.199.222	NOERROR, 183 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 139.224.142.98	NOERROR, 168 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 39.96.153.61	NOERROR, 149 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 120.76.107.61	NOERROR, 208 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 39.96.153.38	NOERROR, 164 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 120.76.107.38	NOERROR, 196 ms, authoritative	no	yes / yes	refused	-
dns18.hichina.com 2408:4009:501::26	NOERROR, 210 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 18 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.

SOA

warn

serial 2026082509 · primary dns17.hichina.com

Found

Primary (MNAME): dns17.hichina.com
Contact (RNAME): hostmaster.hichina.com
Serial: 2026082509
Refresh / retry: 3600 s / 1200 s
Expire: 86400 s
Negative TTL: 600 s

Serial per nameserver

Nameserver	Serial
dns17.hichina.com (139.224.142.110)	2026082509
dns17.hichina.com (120.76.107.60)	2026081813
dns17.hichina.com (47.118.199.220)	2026082616
dns17.hichina.com (39.96.153.60)	2026082617
dns17.hichina.com (39.96.153.40)	2026082617
dns17.hichina.com (120.76.107.40)	2026082509
dns17.hichina.com (139.224.142.100)	2026082709
dns17.hichina.com (47.118.199.200)	2026082616
dns17.hichina.com (2408:4009:501::25)	2026082509
dns18.hichina.com (139.224.142.108)	2026082709
dns18.hichina.com (47.118.199.198)	2026082616
dns18.hichina.com (47.118.199.222)	2026082815
dns18.hichina.com (139.224.142.98)	2026082509
dns18.hichina.com (39.96.153.61)	2026082616
dns18.hichina.com (120.76.107.61)	2026082509
dns18.hichina.com (39.96.153.38)	2026082616
dns18.hichina.com (120.76.107.38)	2026082509
dns18.hichina.com (2408:4009:501::26)	2026081813

Checks

!

Serials differ

The nameservers serve different versions of the zone: 2026081813 on dns17.hichina.com (120.76.107.60), dns18.hichina.com (2408:4009:501::26); 2026082509 on dns17.hichina.com (139.224.142.110), dns17.hichina.com (120.76.107.40), dns17.hichina.com (2408:4009:501::25), dns18.hichina.com (139.224.142.98), dns18.hichina.com (120.76.107.61), dns18.hichina.com (120.76.107.38); 2026082616 on dns17.hichina.com (47.118.199.220), dns17.hichina.com (47.118.199.200), dns18.hichina.com (47.118.199.198), dns18.hichina.com (39.96.153.61), dns18.hichina.com (39.96.153.38); 2026082617 on dns17.hichina.com (39.96.153.60), dns17.hichina.com (39.96.153.40); 2026082709 on dns17.hichina.com (139.224.142.100), dns18.hichina.com (139.224.142.108); 2026082815 on dns18.hichina.com (47.118.199.222). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.

#22
!

Unusual SOA timers

expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 1h, retry 20m, expire 1d, negative TTL 10m.

#23
✓ Primary is a public nameserver #24

The primary nameserver dns17.hichina.com is one of the listed nameservers.
✓ Contact hostmaster@hichina.com #25

The SOA RNAME hostmaster.hichina.com means hostmaster@hichina.com.
✓ Date-based serial #26

The serial 2026082509 follows the YYYYMMDDnn convention (2026-08-25).

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

5 records at the apex

Found

Read from: 139.224.142.110:53

Type	Value	TTL
SOA	dns17.hichina.com. hostmaster.hichina.com. 2013111909 3600 1200 86400 600	600
NS	dns18.hichina.com.	86400
NS	dns17.hichina.com.	86400
A	138.113.22.153	600
MX	1 intcomedical-com.mail.protection.outlook.com.	3600

Checks

✓ TTLs within range #32

TTLs: A 10m, MX 1h, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
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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