503k.net - robtex.com

503k.net

DNSSEC⚠️ Not signed
A18.166.174.197🇭🇰 Amazon18.166.0.0/15 EC2 HKG prefix
PTRec2-18-166-174-197.ap-east-1.compute.amazonaws.com
A45.156.221.11🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24
A45.156.221.12🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24
A45.156.221.13🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24
A45.156.221.14🇺🇸 DDOS-PROTECTION-LTD45.156.221.0/24
A54.46.75.85🇺🇸 Amazon54.46.0.0/17 EC2 HKG prefix
A156.240.110.244🇭🇰 HKCICL-AS-AP156.240.110.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED
A156.240.110.248🇭🇰 HKCICL-AS-AP156.240.110.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED
A210.79.61.18🇭🇰 EDTCL-HK210.79.61.0/24 EVERY DAY TECHNOLOGY CO. LIMITED UNIT 04,7/F,BRIGHT WAY TOWER,NO.33
NSedns153.ultradns.com ⭐ ⚠️ Not in parent delegation
A2001:502:f3ff::299🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar
PTRedns153.ultradns.com
A204.74.66.153🇺🇸 MAINT-ID-12008204.74.66.0/24 Neustar
PTRedns153.ultradns.com
NSedns153.ultradns.biz ⚠️ Not in parent delegation
A2610:a1:1015::299🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar
PTRedns153.ultradns.biz
A204.74.67.153🇺🇸 MAINT-ID-12008204.74.67.0/24 Neustar
PTRedns153.ultradns.biz
NSedns153.ultradns.net ⚠️ Not in parent delegation
A2610:a1:1014::299🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar
PTRedns153.ultradns.net
A204.74.110.153🇺🇸 MAINT-ID-12008204.74.110.0/24 Neustar
PTRedns153.ultradns.net
NSedns153.ultradns.org ⚠️ Not in parent delegation
A2001:502:4612::299🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar
PTRedns153.ultradns.org
A204.74.111.153🇺🇸 MAINT-ID-12008204.74.111.0/24 Neustar
PTRedns153.ultradns.org
NSpdns104.ultradns.biz ⚠️ Not in zone NS records
A2610:a1:1015::8c🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar
PTRpdns104.ultradns.biz
A156.154.66.104🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar
PTRpdns104.ultradns.biz
NSpdns104.ultradns.com ⚠️ Not in zone NS records
A2001:502:f3ff::8c🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar
PTRpdns104.ultradns.com
A156.154.64.104🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar
PTRpdns104.ultradns.com
NSpdns104.ultradns.net ⚠️ Not in zone NS records
A2610:a1:1014::8c🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar
PTRpdns104.ultradns.net
A156.154.65.104🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar
PTRpdns104.ultradns.net
NSpdns104.ultradns.org ⚠️ Not in zone NS records
A2001:502:4612::8c🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar
PTRpdns104.ultradns.org
A156.154.67.104🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar
PTRpdns104.ultradns.org
SOAedns153.ultradns.comzhanghang8819@gmail.com 2022-09-25 #3

net

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1784155967
⚠️ On DNS blocklist: tif

Same first word

503k.net

Similar names

5k03.com
035k.cc
k350.com
530k.top
k305.com
k350.top
350k.com
530k.net
k035.com
03k5.com

DNS History

18 records (17 active, 1 former)

NSedns153.ultradns.bizedns153.ultradns.comedns153.ultradns.netedns153.ultradns.orgpdns104.ultradns.bizpdns104.ultradns.compdns104.ultradns.netpdns104.ultradns.orgA156.240.110.244156.240.110.24818.166.174.197210.79.61.1845.156.221.1145.156.221.1245.156.221.1345.156.221.1454.46.75.8535.229.226.44
●NSedns153.ultradns.biz2026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●NSedns153.ultradns.com2026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●NSedns153.ultradns.net2026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●NSedns153.ultradns.org2026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●NSpdns104.ultradns.biz2026-04-17 → 2026-07-15 · 2 obs
● 2026-04-17 22:02:56
● 2026-07-15 23:06:24
●NSpdns104.ultradns.com2026-04-17 → 2026-07-15 · 2 obs
● 2026-04-17 22:02:56
● 2026-07-15 23:06:24
●NSpdns104.ultradns.net2026-04-17 → 2026-07-15 · 2 obs
● 2026-04-17 22:02:56
● 2026-07-15 23:06:24
●NSpdns104.ultradns.org2026-04-17 → 2026-07-15 · 2 obs
● 2026-04-17 22:02:56
● 2026-07-15 23:06:24
●A156.240.110.2442026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A156.240.110.2482026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A18.166.174.1972026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A210.79.61.182026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
○A35.229.226.442026-04-17 → 2026-04-17 · 3 obs
● 2026-04-17 22:02:56
○ 2026-05-27 20:45:10
○ 2026-07-15 23:06:24
●A45.156.221.112026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A45.156.221.122026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A45.156.221.132026-05-27 → 2026-07-15 · 5 obs
○ 2026-04-17 22:02:56
● 2026-05-27 20:45:10
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A45.156.221.142026-05-27 → 2026-07-15 · 5 obs
○ 2026-04-17 22:02:56
● 2026-05-27 20:45:10
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24
●A54.46.75.852026-04-17 → 2026-07-15 · 4 obs
● 2026-04-17 22:02:56
○ 2026-07-13 03:23:02
● 2026-07-15 23:06:22
● 2026-07-15 23:06:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
neta.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
503k.netpdns104.ultradns.net, pdns104.ultradns.com, pdns104.ultradns.biz, pdns104.ultradns.org2 records

✅ Authoritative Response

Server:156.154.65.104

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 503k.net (unsigned zone)

⏱️ Timing

Total: 457ms | Queries: -

📄 Records

TypeCountSample Data
A9156.240.110.244, 156.240.110.248...
NS4edns153.ultradns.biz, edns153.ultradns.com...
SOA1edns153.ultradns.com zhanghang8819.gmail

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

503k.net points to 9 IP addresses, including 18.166.174.197, 45.156.221.11 and 45.156.221.12, plus 6 other.

9270k.com, y5051.com, 4073y.com plus two other host names have IP numbers in common with 503k.net.

Name Servers

503k.net delegates authority to 8 name servers: edns153.ultradns.biz, pdns104.ultradns.biz, edns153.ultradns.com plus 5 other.

At least some of 503k.net's name servers are shared with other domains, for example leyubet1314.com, kyty53.com, 1007lyvip.com and two more.

These name servers tend to co-occur with pdns104.ultradns.com, pdns104.ultradns.net, pdns104.ultradns.org and 7 other name servers in the same DNS delegations.

Host names pointing to 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.