`2721ky.com`

DNSSEC	⚠️ Not signed
A	18.166.174.197^{🇭🇰 Amazon18.166.0.0/15 EC2 HKG prefix}
		PTR	`ec2-18-166-174-197.ap-east-1.compute.amazonaws.com`
A	45.156.221.11^{🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24}
A	45.156.221.12^{🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24}
A	45.156.221.13^{🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24}
A	45.156.221.14^{🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24}
A	54.46.75.85^{🇺🇸 Amazon54.46.0.0/17 EC2 HKG prefix}
A	156.240.110.244^{🇭🇰 HKCICL-AS-AP156.240.110.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
A	156.240.110.248^{🇭🇰 HKCICL-AS-AP156.240.110.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
A	210.79.61.18^{🇭🇰 EDTCL-HK210.79.61.0/24 EVERY DAY TECHNOLOGY CO. LIMITED UNIT 04,7/F,BRIGHT WAY TOWER,NO.33}
NS	`edns153.ultradns.com` ⭐ ⚠️ Not in parent delegation
		A	2001:502:f3ff::299^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`edns153.ultradns.com`
		A	204.74.66.153^{🇺🇸 MAINT-ID-12008204.74.66.0/24 Neustar}
			PTR	`edns153.ultradns.com`
NS	`edns153.ultradns.biz` ⚠️ Not in parent delegation
		A	2610:a1:1015::299^{🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar}
			PTR	`edns153.ultradns.biz`
		A	204.74.67.153^{🇺🇸 MAINT-ID-12008204.74.67.0/24 Neustar}
			PTR	`edns153.ultradns.biz`
NS	`edns153.ultradns.net` ⚠️ Not in parent delegation
		A	2610:a1:1014::299^{🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar}
			PTR	`edns153.ultradns.net`
		A	204.74.110.153^{🇺🇸 MAINT-ID-12008204.74.110.0/24 Neustar}
			PTR	`edns153.ultradns.net`
NS	`edns153.ultradns.org` ⚠️ Not in parent delegation
		A	2001:502:4612::299^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`edns153.ultradns.org`
		A	204.74.111.153^{🇺🇸 MAINT-ID-12008204.74.111.0/24 Neustar}
			PTR	`edns153.ultradns.org`
NS	`pdns104.ultradns.biz` ⚠️ Not in zone NS records
		A	2610:a1:1015::8c^{🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar}
			PTR	`pdns104.ultradns.biz`
		A	156.154.66.104^{🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar}
			PTR	`pdns104.ultradns.biz`
NS	`pdns104.ultradns.com` ⚠️ Not in zone NS records
		A	2001:502:f3ff::8c^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`pdns104.ultradns.com`
		A	156.154.64.104^{🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar}
			PTR	`pdns104.ultradns.com`
NS	`pdns104.ultradns.net` ⚠️ Not in zone NS records
		A	2610:a1:1014::8c^{🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar}
			PTR	`pdns104.ultradns.net`
		A	156.154.65.104^{🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar}
			PTR	`pdns104.ultradns.net`
NS	`pdns104.ultradns.org` ⚠️ Not in zone NS records
		A	2001:502:4612::8c^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`pdns104.ultradns.org`
		A	156.154.67.104^{🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar}
			PTR	`pdns104.ultradns.org`
SOA	`edns153.ultradns.com`zhanghang8819@gmail.com 2022-12-19 #3

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785424272

⚠️ On DNS blocklist: tif

Same first word

2721ky.com

Similar names

1227ky.com

2217ky.com

2712ky.com

1272ky.com

DNS History

17 records (17 active, 0 former)

●NSedns153.ultradns.biz2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSedns153.ultradns.com2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSedns153.ultradns.net2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSedns153.ultradns.org2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSpdns104.ultradns.biz2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSpdns104.ultradns.com2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSpdns104.ultradns.net2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●NSpdns104.ultradns.org2026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A156.240.110.2442026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A156.240.110.2482026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A18.166.174.1972026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A210.79.61.182026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A45.156.221.112026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A45.156.221.122026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A45.156.221.132026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A45.156.221.142026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

●A54.46.75.852026-07-26 → 2026-07-30 · 2 obs

● 2026-07-26 19:59:16
● 2026-07-30 15:37:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
2721ky.com	pdns104.ultradns.net, pdns104.ultradns.com, pdns104.ultradns.biz, pdns104.ultradns.org	2 records

✅ Authoritative Response

Server:156.154.67.104

NS records: pdns104.ultradns.net, pdns104.ultradns.com, pdns104.ultradns.biz, pdns104.ultradns.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 2721ky.com (unsigned zone)

⏱️ Timing

Total: 514ms | Queries: -

📄 Records

Type	Count	Sample Data
A	9	`210.79.61.18, 54.46.75.85...`
NS	4	`edns153.ultradns.biz, edns153.ultradns.com...`
SOA	1	`edns153.ultradns.com zhanghang8819.gmail`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (pdns104.ultradns.com, pdns104.ultradns.com)

Analysis

IP Addresses

2721ky.com directs to 9 IP numbers: 18.166.174.197, 45.156.221.11, 45.156.221.12 and 6 other.

Two other host names, along with 2768ky.com, 291kaiyun.net and 2854ky.com, also share IP numbers with 2721ky.com.

Name Servers

2721ky.com delegates authority to 8 name servers: edns153.ultradns.biz, pdns104.ultradns.biz, edns153.ultradns.com plus 5 other.

2721ky.com partially shares its NS delegation with several other domains, including k8102.com, iristel.network, 2787ky.com and two others.

In DNS configurations, these name servers often share authority with pdns104.ultradns.com, pdns104.ultradns.net, pdns104.ultradns.org and 7 other name servers.

Host names that have two IP addresses:

edns153.ultradns.biz directs traffic to 204.74.67.153 and 2610:a1:1015::299.

pdns104.ultradns.biz directs traffic to 156.154.66.104 and 2610:a1:1015::8c.

edns153.ultradns.com directs traffic to 204.74.66.153 and 2001:502:f3ff::299.

pdns104.ultradns.com directs traffic to 156.154.64.104 and 2001:502:f3ff::8c.

edns153.ultradns.net directs traffic to 204.74.110.153 and 2610:a1:1014::299.

pdns104.ultradns.net directs traffic to 156.154.65.104 and 2610:a1:1014::8c.

edns153.ultradns.org directs traffic to 204.74.111.153 and 2001:502:4612::299.

pdns104.ultradns.org directs traffic to 156.154.67.104 and 2001:502:4612::8c.